features of lcd monitors in stock
Unlike CRT monitors, LCD monitors display information well at only the resolution they are designed for, which is known as the native resolution. Digital displays address each individual pixel using a fixed matrix of horizontal and vertical dots. If you change the resolution settings, the LCD scales the image and the quality suffers. Native resolutions are typically:
When you look at an LCD monitor from an angle, the image can look dimmer or even disappear. Colors can also be misrepresented. To compensate for this problem, LCD monitor makers have designed wider viewing angles. (Do not confuse this with a widescreen display, which means the display is physically wider.) Manufacturers give a measure of viewing angle in degrees (a greater number of degrees is better). In general, look for between 120 and 170 degrees. Because manufacturers measure viewing angles differently, the best way to evaluate it is to test the display yourself. Check the angle from the top and bottom as well as the sides, bearing in mind how you will typically use the display.
This is a measurement of the amount of light the LCD monitor produces. It is given in nits or one candelas per square meter (cd/m2). One nit is equal to one cd/m2. Typical brightness ratings range from 250 to 350 cd/m2 for monitors that perform general-purpose tasks. For displaying movies, a brighter luminance rating such as 500 cd/m2 is desirable.
The contrast ratio rates the degree of difference of an LCD monitor"s ability to produce bright whites and the dark blacks. The figure is usually expressed as a ratio, for example, 500:1. Typically, contrast ratios range from 450:1 to 600:1, and they can be rated as high as 1000:1. Ratios more than 600:1, however, provide little improvement over lower ratios.
Unlike CRT monitors, LCD monitors have much more flexibility for positioning the screen the way you want it. LCD monitors can swivel, tilt up and down, and even rotate from landscape (with the horizontal plane longer than the vertical plane) to portrait mode (with the vertical plane longer than the horizontal plane). In addition, because they are lightweight and thin, most LCD monitors have built-in brackets for wall or arm mounting.
Besides the basic features, some LCD monitors have other conveniences such as integrated speakers, built-in Universal Serial Bus (USB) ports and anti-theft locks.
Contrast ratio - The difference in light intensity between white and black on an LCD display is called contrast ratio. The higher the contrast ratio, the easier it is to see details.
Ghosting - An effect of slower response times that cause blurring of images on an LCD monitor, it"s also known as latency. The effect is caused by voltage temporarily leaking from energized elements to neighboring, non-energized elements on the display.
Luminance - Also known as brightness, it is the level of light emitted by an LCD display. Luminance is measured in nits or candelas per square meter (cd/m2). One nit is equal to one cd/m2.
Stuck pixels - A pixel that is stuck either "on" or "off", meaning that it is always illuminated, unlit, or stuck on one color regardless of the image the LCD monitor displays can also be called a dead pixel.
Viewing angle - It"s the degree of angle at which you can view the screen from the sides (horizontal angle) and top/bottom (vertical angle) and continue to see clearly defined images and accurate colors.
These LCD displays are the most common among others, mainly because they are lightweight, produce the best images, and use less power. The display is composed of millions of pixels that form images.
If you are looking for information about LCD Monitors (see HP monitors) then you are at the right place. You will find everything you want to know about LCD Monitor with its definition, description, function, benefits, how to use it, where to buy, and links for reviews and comparisons to make the most out of your investment.
An LCD monitor (Liquid Crystal Display Monitor) is a video display device commonly used in computers and televisions. It is a flat panel display as opposed to the more traditional cathode-ray tube (CRT) for television sets and oscilloscope monitors.
Also, this flat panel display has other advantages over CRT displays that include higher resolution, brighter images, better contrast ratios, deeper black ranges, more color palettes, and most importantly extremely lower power demands. In most cases, LCD monitors are lightweight and thinner than CRT monitors, which makes them perfect as portable monitors, too.
There are various types of LCD monitors on the market, with each having its pros and cons. Some are designed to provide wide viewing angles, while others are made to provide great image quality. If you are looking for an LCD monitor for your Mac Mini, PC, or laptop, here are the main types to choose from;
Twisted Nematic (TN) is one of the most common LCD technologies. It has been the dominant technology for regular home and office displays from 2001 to 2010 until it was replaced by better alternative technologies of In-Plane Switching (IPS), and VA.
One of the biggest selling points of TN displays is their incredibly fast response time, which is at 1ms. This makes them excellent for competitive FPS gaming, or for that awesome snappy feel when browsing the web or editing photos.
Vertical Alignment (VA) panels are a type of LCD display panel that features better contrast ratios and black uniformity when compared to IPS and TN panels.
IPS (In-Plane Switching) panels come with the best features. Their most distinctive feature is their wide viewing angles both horizontally and vertically.
As a result of this, they are best suited for multi-user or collaborative environments, though it must be said that this kind of technology is also appreciated by individuals who look for wider screen views.
The additional characteristics of this type of LCD monitor include high image quality, adaptability to bright light conditions, color accuracy, and competitive pricing - all factors which have made them very popular.
At the back of the LCD display, there is a backlight that emits white light. It goes through a horizontal polarizer; this is a kind of filter that allows only horizontal polarized light beams to pass through it.
Most modern LCD monitors have several parts that work together to produce an image. The main parts include;The panel,The cables (power cable and connectivity cables)The stand
LCD Monitor is one of the most important technologies that exist today, especially if you are working on a project. One of the very first LCD monitors was developed in 1970 by inventor J. Fergason (see also who created the first monitor historically).
Before that, cathode ray displays were bulky, consumed a lot of electricity, did not last a long time, and did not produce great images like today’s Acer LCD monitor, Dell LCD monitor, or AOC LCD monitor.
It is not until 1981 when Solartron introduced the first color LCD monitor; his name is always mentioned when one is researching thehistory ofmonitors. Since then, LCD monitors have evolved at an alarming rate. Even now, more innovations are being made to make them more durable and useful for customers.
Liquid crystals are made up of organic material that has special properties that change when an electric current is applied to them. This material is sandwiched between two layers. The electric current makes the crystals change their shape so they can either let light through or block it at will.
The inventor of the LCD monitor is inventor J. Fergason. He was a business entrepreneur as well as an American inventor. He was born on January 12, 1934, and died on December 9, 2008.
Before he died, he had over 100 US patents on his name. He began experimenting with liquid crystals when he was hired by Westinghouse Research Laboratories. His research led to the development of a Liquid crystal thermometer and a mood ring.
Tests have proved that Samsung monitors such as Samsung u32j590 31.5 16 9 4k UHD LCD monitor and AOC 27b1h 27 LCD monitor black are much better than the traditional cathode ray and Plasma monitors. Why?
In order to have a better understanding of what makes this type of monitor superior, it is first necessary to understand its features which are;Are lightweight
LCD is the best technology for most people, but it does have its downsides. The most obvious one is price. While LCD panels are getting cheaper, they"re still more expensive than CRT displays.
An LCD Monitor gives sharp clear image quality with its high resolution. The high resolution means viewing more pixels on the screen for a superior picture. Combining super-resolution, vivid colors, and extreme brightness, LCD monitors will amaze you. Nonetheless, when looking for your movies monitor, it is essential to go for high-resolution models.
The price of an LCD monitor depends on its size and features. Generally, prices range from roughly $150 to over $2000, although some models may be less expensive or more expensive.
It is possible that buying one of the less expensive models could save you money in the long run, and it is also possible that buying one of the more expensive models could save you money in the long run.
There are various models of LCD monitors on the market. The power consumption of each model depends on the display size, resolution, brightness, etc. The power consumption of a 19-inch LCD monitor averages around 20 watts.
There are various brands that manufacture LCD monitors. Some of the most common brands include:Lenovo such as Lenovo l22e 20 21.5-inch LCD backlit lcd monitorDELL such as dell 2407wfp 24-inch widescreen ultrasharp lcd monitorSamsung such as Samsung 32 curved 1920x1080 HDMI 60hz 4ms fhd lcd monitorAcerHPLG such as LG 34 ips lcd ultrawide fhd freesync monitor blackSanyoSony
Huge number of professionals enjoy numerous benefits of LCD technology. No matter what you do, whether you use your computer monitor for editing videos, graphic design, programming, or if you are someone who plays computer games frequently, you will need the best LCD because of its great features.
LED monitors (a form of LCD) are your best choice as monitors for graphic design. They are a bit pricier than VA panels but the difference in performance is worth it. You get a faster response time and better color rendition while keeping everything within a budget.
If you are a photographer, working with monitors for photo editing is as important as the camera you work with. The key feature you should look for is backlight. LED"s (a form of LCD) will have brighter, sharper blacks than that of an regular LCD, making them ideal for the digital photo editor. The fact is also that you won"t have to spend a fortune as there are many affordable options.
When looking for a monitor for architects one should focus on color, brightness, and contrast. Optimal color performance and resolution is what most monitors for architecture are equiped with. We should also point out that best monitors for CAD and similar demanding software share similar features and technology.
Without a shadow of a doubt, to trade without hinderence you will need the best monitor for traders out there. The screen size matters, with better resolution, you get the better image quality, and most importantly with flicker free, and anti-glare screen features, you won"t to strain your eyes in artificial light.
In this category LCD monitor represents an excellent choice. You can have all features of a business-style monitor with full customibility according to what your work requires. We must point out that you should look at monitors for programming that provide vibrant colors and excellent viewing angles usually found in a 4k monitor - see Ultrawide Vs. 4K here - which may not be within your budget. If you must compromise than go for these budget monitors we reviewed.
For non-professionals, too, a good monitor is critical for daily use, whether you are creating spreadsheets, editing videos, or, surfing the Internet.
I have made it simple for you to pick the best computer LCD monitors currently by listing them in this section. I have evaluated each monitor based on its price, display technology, panel type, size, inputs, speakers, ergonomics, and video performance.
If you want to buy an LCD monitor, there are several key factors to consider. They include screen size, screen resolution, response time, brightness, and refresh rate.
When buying an LCD monitor, one of the most important parameters to consider is screen resolution (the number of pixels). The higher the resolution, like in these 40 inch 4K monitors, the more you will see your documents (see here which monitors are our top choice for reading), spreadsheets, or photos on your screen. You"ll also enjoy sharper images and smoother lines.
The refresh rate of a small LCD monitor, curved LCD monitor, or a touch screen LCD monitor is very important, especially when playing video games. The refresh rate is measured in Hertz or Hz. It refers to the number of times the picture on the screen is refreshed per second. With 60Hz there could be plenty of ghosting, but with 120hz monitors, or, even better, 144Hz monitors, the difference will be obvious.
The higher the refresh rate, the more fluid video content will appear on your screen. A refresh rate is crucial when you are playing games, so the safest bet is to go for a 240Hz monitor. Also, you will give your games an immersive feel with one of the ultra-wide computer monitors.
Screen size is also an important thing to consider when you"re in the market for a new LCD monitor. The most common sizes used for monitors are 14, 17,21, 27,32 and 42 inches. Anything less than a 24 inch monitor would be considered a small LCD monitor.
These are the required steps to install an LCD monitor. Your new monitor can come with all the necessary accessories you"ll need, including cables and screws.
The first step to installing any LCD monitor is to unbox the product. Feel free to take your time as you unpack and familiarize yourself with the product. Look at all of the contents and verify that everything is accounted for.
The second step to installing an LCD monitor is gathering the tools required for the job such as a screwdriver, gloves, and screws and the cables needed.
Most monitors come with an instruction manual that can be read to better understand how to install the LCD screen. The user manual details the screen resolution, cable connection placement, and how to mount the monitor to its stand.
To connect an LCD monitor to a computer using a cable, insert one end of the cable into the appropriate port at the rear or the side of the computer. Connect the other end to the display.
Are you afraid of making a mistake when cleaning it? Don"t worry, I have a great solution for you. You can follow my simple guidelines and learn how to clean a monitor in a matter of minutes.
Before cleaning your monitor, use the power button to switch it off or unplug it from the electric socket if it is still connected. Leaving this step out may cause serious injury as you risk the danger of electric shock if you do not turn off your monitor first.
If you want to clean your entire monitor, you will also need to remove it from its frame. You can do this by removing the screws at the back of the frame with a screwdriver. Then slide the monitor out of the frame.
To clean the LCD monitor of your computer, find some monitor wipes. These are available at most office supply stores and are perfect for cleaning monitor screens.
Many monitor experts recommend that you purchase a monitor cleaning kit because these kits include all the products that you will need to effectively clean your monitor. This kit contains a monitor cleaning solution, which you can use to clean any oil or dirt off the surface of your monitor.
Each type, depending upon the needs of the user, has its own benefits and drawbacks. In order to determine which is the best for your individual needs, it is necessary to know what you are connecting with.
Yes, LCD monitors are suitable for gaming. High resolution, high refresh rates, and low response times are some of the features that make LCD monitors suitable for both professional gamers and amateur gamers.
The combination of high refresh rates and low response times enables gamers to react quickly and enjoy a smooth visual performance. Features like in G-sync monitors help eliminate motion blur and other issues that can reduce your performance.
Yes, LCD monitors are suitable for business. Business owners with limited space, or workers traveling on business, now can take their lightweight computer monitor with them. Moreover, since convenience is your number one goal in that case, it helps to have monitors with speakers built into them already!
The best work monitorsare superbly suited for the display of data, tables with rows and columns of numbers, figures, or other information. The performance is consistent and they help save energy as they are energy efficient. And for best productivity, if you are able to pull it off, using multiple monitors for which the bezel less monitors are best suited, is the right way to go.
It is also important that the monitor has some type of heat sink; the way it dissipates heat away from the circuitry. The most common heat sink is a base plate or duct that channels air through the back of the monitor. This helps prevent discoloration on the screen that can happen with some LCD monitors when they are left in a car continuously.
They are typically well-shielded against RFI/EMI to prevent interference from cellular phone signals, thunderstorm lighting, and other types of interference that might disrupt the video signal from your device.
LCD monitors use cold cathode fluorescent lamps (CCFLs) to illuminate the display while LED monitors use diode-based lights. Also, in terms of eye strain, visuals, and energy consumption, LEDs outperform LCDs.
IPS is a technology used in LCD screens. IPS monitors are preferred by professionals for their true-to-life color representation, wide viewing angles, and superior-high-quality image clarity.
They are the ultimate solution for professional photo editing, graphic designing, and video editing. Generally, LCD monitors are the most affordable and popular display options available today (see monitors under 200 dolars). These monitors are ideal for both office and home use, whether you want to game or watch movies. As for games exclusively, curved gaming monitors, which are mostly IPS, are especially comfortable for your eyes and they are probably the ones to turn to (see also top curved monitors overall)
Apart from LCD monitors, other types of computer monitors are;The first is the CRT or cathode ray tube monitor.Another type of monitor is an OLED Monitor. It is brighter, thinner, and with better color contrast than most other monitors.Plasma monitorsTouch Screen monitor
Are you tired of your old computer monitor and in dire need of a new one? Maybe you should make yourself familiar with LCD computer monitors. LCD stands for liquid crystal display and are also known as flatscreens.
LCDs have been used for a while, for example in digital clocks and laptops. In recent years they have become a standard for desktop monitors. During the same time, LCDs have also conquered the TV market.
Flatscreen monitors are much thinner and lighter than CRT (cathode ray tube) monitors. They also require less energy, emit no electromagnetic radiation, and the technology enables clearer images, higher resolutions, and a flicker-free display, which is easier on the eyes.
These are only a few key arguments to finally replace the old CRT monitor. This article explains the various features of monitors in general and flatscreens in specific. It will help you understand what you should watch out for when buying a new LCD computer monitor.
The screen size is measured in inches, diagonally from the bottom left to the upper right corner of the display. Available sizes range from 15" to 30". The most common size for a desktop monitor today is 19" to 22", but it is not uncommon to buy larger sizes.
Bigger sizes usually means you will have more room on your desktop. You might finally be able to view multiple open windows in parallel. However, bigger monitors also take up more space on your desk and they tend to be more expensive.
Aspect ratio describes the relative number of horizontal to vertical pixels in a display. Standard CRT monitors were almost square with an aspect ratio of 4:3. Today, you will find widescreen monitors that have aspect ratios like movie theater screens, i.e. 16:9 or 16:10. 16:9 is also called HD (high definition).
Resolution is the number of pixels displayed horizontally and vertically. Due to the nature of LCD technology, flatscreens have only one optimized or native resolution. Hence, their native resolution describes the absolute number of pixels present horizontally and vertically.
Unlike CRT monitors, using a lower than native resolution on a flatscreen, leads to fuzzy images. Hence it is important to choose the right native resolution from the start as you can not change it, unless you accept a loss of image quality.
Crunch Gear has produced a great comparison chart of aspect ratios and available resolutions. Click the respective links for the article [Broken URL Removed] or the full size image.
Contrast ratio describes the difference between the brightest white and the darkest black the LCD computer monitor can display. Higher contrast ratios equal whiter whites and blacker blacks, as well as a greater degree of gray values in between. The best contrast ratio you can get is 1,000 : 1.
LCD monitors are illuminated by several backlights. Brightness is measured in candelas per square meter (cd/m2). A higher rating of at least 300 cd/m2, i.e. higher brightness, is to be desired if you want to watch movies or play games on your computer. For office work and browsing a lower rating of 200 - 250 cd/m2 is fine.
The higher the viewing angle, the better people who look at the monitor from the side will be able to see its display. Compared to CRTs, LCDs have a limited viewing angle. However, this feature is only interesting if you expect yourself or guests to look at your monitor with an angle. You can ignore it if you"re always going to sit straight in front of your monitor.
All this time I"ve only been talking about the display and the LCD technology. But a monitor is more than just a display. It needs to be connected to a computer and possibly other devices. Hence, you need to know what type of port you will need and then make sure the monitor has it. Most importantly, check which connector your video card supports.
I didn"t go into response time, which can be neglected, and panel technology, which basically doesn"t matter if you make up your mind about the above features.
To summarize, you should first pick a desired size, aspect ratio, and resolution. These characteristics should meet your needs. In the next step you can compare all available models for further features, most importantly contrast ratio, brightness, and available ports. Finally, the price will decide which model you can afford.
Liquid-crystal display (LCD) monitors are the most common today. They generally consist of a liquid crystal panel and a fluorescent backlight system located at the back of the screen. The images are shown when the light from the feedback system hits the screen.
LCD monitors are characterized by their flat, thin, and durable screens. Besides, they have had integrated LED feedback for some years now, which is why manufacturers often talk about LED LCDs. These monitors generally have low energy consumption and are affordable.
LCD monitors have many benefits to offer. As we just mentioned, they have extremely low energy consumption, and you can find very affordable models. They also allow you to enjoy very vivid colors and high definition levels.
You will have to evaluate a series of key criteria before you can choose the LCD monitor that best fits your needs. Since we want to make your life easier, we have selected the most important aspects to consider and have detailed them in the following section. This will help you sort through the wide array of options on the market, and you will know how to pick a monitor that offers the performance and value for the money you’re looking for.
You won’t want the same type of monitor if you often play video games on your computer or if you only use it for browsing the internet and office tasks. This is why the very first aspect you should think about is how exactly you plan on using your LCD monitor.
Even if you are looking for a gaming monitor, you will have to choose a model suitable for the type of game you play. If you are into competitive games, you should choose one with a low response time. For graphic design or to view content in high definition, on the other hand, your best bet will be a VA panel.
The screen size of a monitor is generally expressed as a function of the length of its diagonal in inches. The size of the screen you choose should, in part, be determined by the area of your home or office where you want to fit the monitor. That being said, the vast majority of LCD monitors currently vary between 24 and 27 inches in size.
Did you know that LCD, called liquid-crystal display, means that electrical pulses form the basis for the alignment of the crystals, which produce different colors due to their uneven light transmission?
As we briefly mentioned earlier, there are three main types of panels for monitors and TVs: TN, IPS, and VA. Each one has its own features and is more tailored to a specific type of use.
We have entered the age of 4K resolution, and we are already starting to talk about 8K resolutions. In any case, if you use your computer for navigation or office tasks, Full HD resolution will be plenty enough for you. This is quite different if you want to play video games intensively.
If this is your case, you should start your search by looking at monitors with 4K resolution. Do keep in mind that a high-quality LCD monitor isn’t enough; you still need to have a powerful enough computer. Since more and more 4K content is being released, you may also be interested in these monitors if you are a cinephile.
High dynamic range (HDR) technology has become increasingly common in monitors and televisions in the last few years. It makes it possible to offer colors that are much closer to those we can see in reality. Another fantastic benefit of HDR is that it can independently illuminate different areas of the monitor.
This high-dynamic range means that you can enjoy a higher contrast in the image. The main advantages of this technology are, therefore, the illumination of the different scenes and the incredibly vivid colors it offers. Remember that there are currently different HDR standards: HDR10, Dolby Vision, HDR10+, and HLG.
The greatest advantage of the HDMI port is that it also allows you to transmit audio. DVI ports, on the other hand, support higher refresh rates. You may also think about the DisplayPort connection as it offers the best bandwidth. As you can imagine, it’s never a bad idea to have an LCD monitor with a couple of USB ports as well.
Currently, the vast majority of manufacturers use the 16:9 aspect ratio. That said, the more recent 21:9 aspect ratio is increasingly common. It allows us to work with high diagonals and for tasks where you need many windows at the same time, including the use of multimedia equipment.
If you are an avid gamer, on the other hand, you may also be interested in the 1440p resolution, which won’t be so heavy on your graphics card. Don’t hesitate to go for an HDR 4K monitor if you have a desktop computer with a powerful graphics card or a gaming console. The latest video games will be perfect for you to make the most of this resolution.
First of all, there is often a direct relationship between the size of the screen and the price of the monitor. However, we’re sure you will have guessed that it isn’t the only influencing factor in the final cost of the product. The type of panel is another element that plays a significant role in this, the three main ones being TN, VA, and IPS.
The most expensive panels are currently the IPS models, although their price has dramatically decreased in recent years. Also, the image resolution and HDR technology are factors to consider in the final cost of an LCD monitor. If you are looking for a gaming model, keep in mind that they often integrate specific technologies to offer better in-game performance and are, therefore, more expensive.
Most laptops feature a VGA or HDMI connector through which you can connect them to a monitor. In any case, you can always establish the connection using a USB Type-C port. This will allow you to enjoy one of two different things: a larger screen or the possibility of having a dual-screen setup.
A crucial part of every system build, a well-made computer monitor ensures that you will realize the performance output by your computer hardware. Perhaps you spent days, weeks, and months choosing the right CPU and the best graphics card to play the games at the resolutions you want. However, suppose you blew your budget on all the horsepower and left none for the display. In that case, you’re not going to appreciate the intensity of all those pixels that your computer renders at incredible speeds. With PC games getting more graphically intense, you must ensure your display can keep up.
You’ve probably seen terms like HD and Full HD on the boxes of monitors and TVs, but what does that mean? As you may have guessed, HD refers to “High Definition,” a quick way to refer to a high-quality video output. So if you see the term “Full HD” on a monitor box, that’s just a shorthand to denote its resolution, which would be 1920 by 1080, also called 1080p. The reason why it’s specified as “Full HD” is that there are also some TVs and monitors that output at 720p (high definition but not relatively as high as 1080p), which is 1280 by 720 pixels. 1080p is considered the current standard for monitors, and popular manufacturers, including Dell, Acer, Samsung, LG, BenQ and Viewsonic, offer a variety of 1080p monitors in their product lineups.
When it comes to resolution, 4K is all the buzz right now. Game developers and graphics card manufacturers focus on making and running games at 4k resolutions, twice the horizontal and vertical resolution of 1080p. Officially labeled as 4K UHD, the full pixel resolution is 3840 by 2160. That’s why there had to be a new term to define the resolution scale because 4k is much clearer and more vibrant than 1080p. Many people would call it hyper-realistic because of how many pixels populate the display area. To make it easier to distinguish between the two resolution types, 1080p is often referred to as 2k resolution.
As you can imagine, the more pixels there are to display, the more critical it is that your monitor has a high refresh rate, especially when it comes to gaming. Typically, the standard has been a 120-hertz refresh rate in gaming monitors, but many features a 144-hertz refresh rate. The quicker a monitor can refresh the display, and the smoother the visual experience will be. This is because the refresh rate in the monitor works in tandem with a low response time (which specifies how quickly the monitor can send and receive new information) to make a seamless visual transition. Sometimes, if the response rate is not quick enough, some residual pixels can remain on the screen as the monitor is trying to refresh new ones. This is called ‘ghosting.’ Although it’s standard to have a four-millisecond response time on many gaming monitors, Samsung, LG, BenQ, Viewsonic, and more all offer 2k and 4k monitors with one-millisecond response times. It is also important to ensure refresh rates are identical if you plan to sync two monitors for your display.
Regarding the internal specs, response time and refresh rate are the main factors contributing to a smooth, immersive viewing experience. Still, the physical panel type of the monitor can also play into this. First, there’s the matter of how the monitor lights up: either with LCD or LED. The main difference lies in the material that is used to light the liquid crystals in the display. In LCD, it’s cold cathode fluorescent lamps (CCFLs), and in LEDs, it’s tiny light emitting and low-energy consuming diodes. This is the preferred type in most monitors because it consumes less power and produces less harsh light, so darker colors appear more vivid. Additionally, LED monitors can be much thinner than LCD ones.
Newer LCD monitors have improved with the implementation of IPS (In-Plane Switching) panels. For some, it’s a matter of preference, but where the IPS panels have shown their strength with accurate color reproduction, which is great for content creators who want to do photo editing or graphic design. The panel type you choose depends more on preference than anything else. Samsung is well known for championing the IPS panel in their monitors, and many people also enjoy using them for gaming.
For some people, it’s essential, not just the monitor specs. Having a monitor that is fast, intuitive, and also looks nice on their desk is a crucial part of a computer build designed to make a statement. Asus’ Predator X34 shows off with its 34-inch curved IPS panel that also features Nvidia’s Gsync technology, which matches the gaming framerates with the monitor’s native refresh rate to prevent screen tearing. For those who want the style without the price tag, Samsung offers a 29-inch curved monitor with a 4-millisecond response time.
As touch navigation becomes more normalized due to mobile browsing, you may also want to consider a touch monitor for maximum accessibility. Planar offers a 22-inch optical touchscreen monitor that is highly portable due to its USB connection type. For something you can use in meetings for presentations, Dell provides a capacitive touchscreen monitor that also features an IPS panel.
Finally, another consideration is whether there are enough HDMI (High-Definition Multimedia Interface) ports. HDMI allows simultaneous digital video and audio transmission from one source to another. While HDMI ports are often standard, especially on gaming monitors, verifying that a monitor has enough HDMI compatibility for your setup before purchasing is essential.
When you’ve picked out the perfect display, don’t forget the essential accessories to go with it. For a two or three-screen setup, Ergotron, Rosewill, and SIIG offer a variety of stationary and swivel monitor mounts for both the wall and your desk. Soon, you’ll have a command center that you’ll never want to leave. So, ready to get started?
Since monitors have to be lit in order for the viewer to see anything, the difference between the two types is in what is used to light up the crystals within the display. For LCD, that’s cold cathode fluorescent lamps (CCFL’s) and in LEDs, it’s tiny light emitting and low-energy consuming diodes. LED monitors tend to be thinner and more power-efficient, but improvements in the panel types have made LCDs more competitive.
Glass substrate with ITO electrodes. The shapes of these electrodes will determine the shapes that will appear when the LCD is switched ON. Vertical ridges etched on the surface are smooth.
A liquid-crystal display (LCD) is a flat-panel display or other electronically modulated optical device that uses the light-modulating properties of liquid crystals combined with polarizers. Liquid crystals do not emit light directlybacklight or reflector to produce images in color or monochrome.seven-segment displays, as in a digital clock, are all good examples of devices with these displays. They use the same basic technology, except that arbitrary images are made from a matrix of small pixels, while other displays have larger elements. LCDs can either be normally on (positive) or off (negative), depending on the polarizer arrangement. For example, a character positive LCD with a backlight will have black lettering on a background that is the color of the backlight, and a character negative LCD will have a black background with the letters being of the same color as the backlight. Optical filters are added to white on blue LCDs to give them their characteristic appearance.
LCDs are used in a wide range of applications, including LCD televisions, computer monitors, instrument panels, aircraft cockpit displays, and indoor and outdoor signage. Small LCD screens are common in LCD projectors and portable consumer devices such as digital cameras, watches, digital clocks, calculators, and mobile telephones, including smartphones. LCD screens are also used on consumer electronics products such as DVD players, video game devices and clocks. LCD screens have replaced heavy, bulky cathode-ray tube (CRT) displays in nearly all applications. LCD screens are available in a wider range of screen sizes than CRT and plasma displays, with LCD screens available in sizes ranging from tiny digital watches to very large television receivers. LCDs are slowly being replaced by OLEDs, which can be easily made into different shapes, and have a lower response time, wider color gamut, virtually infinite color contrast and viewing angles, lower weight for a given display size and a slimmer profile (because OLEDs use a single glass or plastic panel whereas LCDs use two glass panels; the thickness of the panels increases with size but the increase is more noticeable on LCDs) and potentially lower power consumption (as the display is only "on" where needed and there is no backlight). OLEDs, however, are more expensive for a given display size due to the very expensive electroluminescent materials or phosphors that they use. Also due to the use of phosphors, OLEDs suffer from screen burn-in and there is currently no way to recycle OLED displays, whereas LCD panels can be recycled, although the technology required to recycle LCDs is not yet widespread. Attempts to maintain the competitiveness of LCDs are quantum dot displays, marketed as SUHD, QLED or Triluminos, which are displays with blue LED backlighting and a Quantum-dot enhancement film (QDEF) that converts part of the blue light into red and green, offering similar performance to an OLED display at a lower price, but the quantum dot layer that gives these displays their characteristics can not yet be recycled.
Since LCD screens do not use phosphors, they rarely suffer image burn-in when a static image is displayed on a screen for a long time, e.g., the table frame for an airline flight schedule on an indoor sign. LCDs are, however, susceptible to image persistence.battery-powered electronic equipment more efficiently than a CRT can be. By 2008, annual sales of televisions with LCD screens exceeded sales of CRT units worldwide, and the CRT became obsolete for most purposes.
Each pixel of an LCD typically consists of a layer of molecules aligned between two transparent electrodes, often made of Indium-Tin oxide (ITO) and two polarizing filters (parallel and perpendicular polarizers), the axes of transmission of which are (in most of the cases) perpendicular to each other. Without the liquid crystal between the polarizing filters, light passing through the first filter would be blocked by the second (crossed) polarizer. Before an electric field is applied, the orientation of the liquid-crystal molecules is determined by the alignment at the surfaces of electrodes. In a twisted nematic (TN) device, the surface alignment directions at the two electrodes are perpendicular to each other, and so the molecules arrange themselves in a helical structure, or twist. This induces the rotation of the polarization of the incident light, and the device appears gray. If the applied voltage is large enough, the liquid crystal molecules in the center of the layer are almost completely untwisted and the polarization of the incident light is not rotated as it passes through the liquid crystal layer. This light will then be mainly polarized perpendicular to the second filter, and thus be blocked and the pixel will appear black. By controlling the voltage applied across the liquid crystal layer in each pixel, light can be allowed to pass through in varying amounts thus constituting different levels of gray.
The chemical formula of the liquid crystals used in LCDs may vary. Formulas may be patented.Sharp Corporation. The patent that covered that specific mixture expired.
Most color LCD systems use the same technique, with color filters used to generate red, green, and blue subpixels. The LCD color filters are made with a photolithography process on large glass sheets that are later glued with other glass sheets containing a TFT array, spacers and liquid crystal, creating several color LCDs that are then cut from one another and laminated with polarizer sheets. Red, green, blue and black photoresists (resists) are used. All resists contain a finely ground powdered pigment, with particles being just 40 nanometers across. The black resist is the first to be applied; this will create a black grid (known in the industry as a black matrix) that will separate red, green and blue subpixels from one another, increasing contrast ratios and preventing light from leaking from one subpixel onto other surrounding subpixels.Super-twisted nematic LCD, where the variable twist between tighter-spaced plates causes a varying double refraction birefringence, thus changing the hue.
LCD in a Texas Instruments calculator with top polarizer removed from device and placed on top, such that the top and bottom polarizers are perpendicular. As a result, the colors are inverted.
The optical effect of a TN device in the voltage-on state is far less dependent on variations in the device thickness than that in the voltage-off state. Because of this, TN displays with low information content and no backlighting are usually operated between crossed polarizers such that they appear bright with no voltage (the eye is much more sensitive to variations in the dark state than the bright state). As most of 2010-era LCDs are used in television sets, monitors and smartphones, they have high-resolution matrix arrays of pixels to display arbitrary images using backlighting with a dark background. When no image is displayed, different arrangements are used. For this purpose, TN LCDs are operated between parallel polarizers, whereas IPS LCDs feature crossed polarizers. In many applications IPS LCDs have replaced TN LCDs, particularly in smartphones. Both the liquid crystal material and the alignment layer material contain ionic compounds. If an electric field of one particular polarity is applied for a long period of time, this ionic material is attracted to the surfaces and degrades the device performance. This is avoided either by applying an alternating current or by reversing the polarity of the electric field as the device is addressed (the response of the liquid crystal layer is identical, regardless of the polarity of the applied field).
Displays for a small number of individual digits or fixed symbols (as in digital watches and pocket calculators) can be implemented with independent electrodes for each segment.alphanumeric or variable graphics displays are usually implemented with pixels arranged as a matrix consisting of electrically connected rows on one side of the LC layer and columns on the other side, which makes it possible to address each pixel at the intersections. The general method of matrix addressing consists of sequentially addressing one side of the matrix, for example by selecting the rows one-by-one and applying the picture information on the other side at the columns row-by-row. For details on the various matrix addressing schemes see passive-matrix and active-matrix addressed LCDs.
LCDs, along with OLED displays, are manufactured in cleanrooms borrowing techniques from semiconductor manufacturing and using large sheets of glass whose size has increased over time. Several displays are manufactured at the same time, and then cut from the sheet of glass, also known as the mother glass or LCD glass substrate. The increase in size allows more displays or larger displays to be made, just like with increasing wafer sizes in semiconductor manufacturing. The glass sizes are as follows:
Until Gen 8, manufacturers would not agree on a single mother glass size and as a result, different manufacturers would use slightly different glass sizes for the same generation. Some manufacturers have adopted Gen 8.6 mother glass sheets which are only slightly larger than Gen 8.5, allowing for more 50 and 58 inch LCDs to be made per mother glass, specially 58 inch LCDs, in which case 6 can be produced on a Gen 8.6 mother glass vs only 3 on a Gen 8.5 mother glass, significantly reducing waste.AGC Inc., Corning Inc., and Nippon Electric Glass.
The origins and the complex history of liquid-crystal displays from the perspective of an insider during the early days were described by Joseph A. Castellano in Liquid Gold: The Story of Liquid Crystal Displays and the Creation of an Industry.IEEE History Center.Peter J. Wild, can be found at the Engineering and Technology History Wiki.
In 1888,Friedrich Reinitzer (1858–1927) discovered the liquid crystalline nature of cholesterol extracted from carrots (that is, two melting points and generation of colors) and published his findings at a meeting of the Vienna Chemical Society on May 3, 1888 (F. Reinitzer: Beiträge zur Kenntniss des Cholesterins, Monatshefte für Chemie (Wien) 9, 421–441 (1888)).Otto Lehmann published his work "Flüssige Kristalle" (Liquid Crystals). In 1911, Charles Mauguin first experimented with liquid crystals confined between plates in thin layers.
In 1922, Georges Friedel described the structure and properties of liquid crystals and classified them in three types (nematics, smectics and cholesterics). In 1927, Vsevolod Frederiks devised the electrically switched light valve, called the Fréedericksz transition, the essential effect of all LCD technology. In 1936, the Marconi Wireless Telegraph company patented the first practical application of the technology, "The Liquid Crystal Light Valve". In 1962, the first major English language publication Molecular Structure and Properties of Liquid Crystals was published by Dr. George W. Gray.RCA found that liquid crystals had some interesting electro-optic characteristics and he realized an electro-optical effect by generating stripe-patterns in a thin layer of liquid crystal material by the application of a voltage. This effect is based on an electro-hydrodynamic instability forming what are now called "Williams domains" inside the liquid crystal.
In 1964, George H. Heilmeier, then working at the RCA laboratories on the effect discovered by Williams achieved the switching of colors by field-induced realignment of dichroic dyes in a homeotropically oriented liquid crystal. Practical problems with this new electro-optical effect made Heilmeier continue to work on scattering effects in liquid crystals and finally the achievement of the first operational liquid-crystal display based on what he called the George H. Heilmeier was inducted in the National Inventors Hall of FameIEEE Milestone.
In the late 1960s, pioneering work on liquid crystals was undertaken by the UK"s Royal Radar Establishment at Malvern, England. The team at RRE supported ongoing work by George William Gray and his team at the University of Hull who ultimately discovered the cyanobiphenyl liquid crystals, which had correct stability and temperature properties for application in LCDs.
The idea of a TFT-based liquid-crystal display (LCD) was conceived by Bernard Lechner of RCA Laboratories in 1968.dynamic scattering mode (DSM) LCD that used standard discrete MOSFETs.
On December 4, 1970, the twisted nematic field effect (TN) in liquid crystals was filed for patent by Hoffmann-LaRoche in Switzerland, (Swiss patent No. 532 261) with Wolfgang Helfrich and Martin Schadt (then working for the Central Research Laboratories) listed as inventors.Brown, Boveri & Cie, its joint venture partner at that time, which produced TN displays for wristwatches and other applications during the 1970s for the international markets including the Japanese electronics industry, which soon produced the first digital quartz wristwatches with TN-LCDs and numerous other products. James Fergason, while working with Sardari Arora and Alfred Saupe at Kent State University Liquid Crystal Institute, filed an identical patent in the United States on April 22, 1971.ILIXCO (now LXD Incorporated), produced LCDs based on the TN-effect, which soon superseded the poor-quality DSM types due to improvements of lower operating voltages and lower power consumption. Tetsuro Hama and Izuhiko Nishimura of Seiko received a US patent dated February 1971, for an electronic wristwatch incorporating a TN-LCD.
In 1972, the concept of the active-matrix thin-film transistor (TFT) liquid-crystal display panel was prototyped in the United States by T. Peter Brody"s team at Westinghouse, in Pittsburgh, Pennsylvania.Westinghouse Research Laboratories demonstrated the first thin-film-transistor liquid-crystal display (TFT LCD).high-resolution and high-quality electronic visual display devices use TFT-based active matrix displays.active-matrix liquid-crystal display (AM LCD) in 1974, and then Brody coined the term "active matrix" in 1975.
In 1972 North American Rockwell Microelectronics Corp introduced the use of DSM LCDs for calculators for marketing by Lloyds Electronics Inc, though these required an internal light source for illumination.Sharp Corporation followed with DSM LCDs for pocket-sized calculators in 1973Seiko and its first 6-digit TN-LCD quartz wristwatch, and Casio"s "Casiotron". Color LCDs based on Guest-Host interaction were invented by a team at RCA in 1968.TFT LCDs similar to the prototypes developed by a Westinghouse team in 1972 were patented in 1976 by a team at Sharp consisting of Fumiaki Funada, Masataka Matsuura, and Tomio Wada,
In 1983, researchers at Brown, Boveri & Cie (BBC) Research Center, Switzerland, invented the passive matrix-addressed LCDs. H. Amstutz et al. were listed as inventors in the corresponding patent applications filed in Switzerland on July 7, 1983, and October 28, 1983. Patents were granted in Switzerland CH 665491, Europe EP 0131216,
The first color LCD televisions were developed as handheld televisions in Japan. In 1980, Hattori Seiko"s R&D group began development on color LCD pocket televisions.Seiko Epson released the first LCD television, the Epson TV Watch, a wristwatch equipped with a small active-matrix LCD television.dot matrix TN-LCD in 1983.Citizen Watch,TFT LCD.computer monitors and LCD televisions.3LCD projection technology in the 1980s, and licensed it for use in projectors in 1988.compact, full-color LCD projector.
In 1990, under different titles, inventors conceived electro optical effects as alternatives to twisted nematic field effect LCDs (TN- and STN- LCDs). One approach was to use interdigital electrodes on one glass substrate only to produce an electric field essentially parallel to the glass substrates.Germany by Guenter Baur et al. and patented in various countries.Hitachi work out various practical details of the IPS technology to interconnect the thin-film transistor array as a matrix and to avoid undesirable stray fields in between pixels.
Hitachi also improved the viewing angle dependence further by optimizing the shape of the electrodes (Super IPS). NEC and Hitachi become early manufacturers of active-matrix addressed LCDs based on the IPS technology. This is a milestone for implementing large-screen LCDs having acceptable visual performance for flat-panel computer monitors and television screens. In 1996, Samsung developed the optical patterning technique that enables multi-domain LCD. Multi-domain and In Plane Switching subsequently remain the dominant LCD designs through 2006.South Korea and Taiwan,
In 2007 the image quality of LCD televisions surpassed the image quality of cathode-ray-tube-based (CRT) TVs.LCD TVs were projected to account 50% of the 200 million TVs to be shipped globally in 2006, according to Displaybank.Toshiba announced 2560 × 1600 pixels on a 6.1-inch (155 mm) LCD panel, suitable for use in a tablet computer,transparent and flexible, but they cannot emit light without a backlight like OLED and microLED, which are other technologies that can also be made flexible and transparent.
In 2016, Panasonic developed IPS LCDs with a contrast ratio of 1,000,000:1, rivaling OLEDs. This technology was later put into mass production as dual layer, dual panel or LMCL (Light Modulating Cell Layer) LCDs. The technology uses 2 liquid crystal layers instead of one, and may be used along with a mini-LED backlight and quantum dot sheets.
Since LCDs produce no light of their own, they require external light to produce a visible image.backlight. Active-matrix LCDs are almost always backlit.Transflective LCDs combine the features of a backlit transmissive display and a reflective display.
CCFL: The LCD panel is lit either by two cold cathode fluorescent lamps placed at opposite edges of the display or an array of parallel CCFLs behind larger displays. A diffuser (made of PMMA acrylic plastic, also known as a wave or light guide/guiding plateinverter to convert whatever DC voltage the device uses (usually 5 or 12 V) to ≈1000 V needed to light a CCFL.
EL-WLED: The LCD panel is lit by a row of white LEDs placed at one or more edges of the screen. A light diffuser (light guide plate, LGP) is then used to spread the light evenly across the whole display, similarly to edge-lit CCFL LCD backlights. The diffuser is made out of either PMMA plastic or special glass, PMMA is used in most cases because it is rugged, while special glass is used when the thickness of the LCD is of primary concern, because it doesn"t expand as much when heated or exposed to moisture, which allows LCDs to be just 5mm thick. Quantum dots may be placed on top of the diffuser as a quantum dot enhancement film (QDEF, in which case they need a layer to be protected from heat and humidity) or on the color filter of the LCD, replacing the resists that are normally used.
WLED array: The LCD panel is lit by a full array of white LEDs placed behind a diffuser behind the panel. LCDs that use this implementation will usually have the ability to dim or completely turn off the LEDs in the dark areas of the image being displayed, effectively increasing the contrast ratio of the display. The precision with which this can be done will depend on the number of dimming zones of the display. The more dimming zones, the more precise the dimming, with less obvious blooming artifacts which are visible as dark grey patches surrounded by the unlit areas of the LCD. As of 2012, this design gets most of its use from upscale, larger-screen LCD televisions.
RGB-LED array: Similar to the WLED array, except the panel is lit by a full array of RGB LEDs. While displays lit with white LEDs usually have a poorer color gamut than CCFL lit displays, panels lit with RGB LEDs have very wide color gamuts. This implementation is most popular on professional graphics editing LCDs. As of 2012, LCDs in this category usually cost more than $1000. As of 2016 the cost of this category has drastically reduced and such LCD televisions obtained same price levels as the former 28" (71 cm) CRT based categories.
Monochrome LEDs: such as red, green, yellow or blue LEDs are used in the small passive monochrome LCDs typically used in clocks, watches and small appliances.
Mini-LED: Backlighting with Mini-LEDs can support over a thousand of Full-area Local Area Dimming (FLAD) zones. This allows deeper blacks and higher contrast ratio.MicroLED.)
Today, most LCD screens are being designed with an LED backlight instead of the traditional CCFL backlight, while that backlight is dynamically controlled with the video information (dynamic backlight control). The combination with the dynamic backlight control, invented by Philips researchers Douglas Stanton, Martinus Stroomer and Adrianus de Vaan, simultaneously increases the dynamic range of the display system (also marketed as HDR, high dynamic range television or FLAD, full-area local area dimming).
The LCD backlight systems are made highly efficient by applying optical films such as prismatic structure (prism sheet) to gain the light into the desired viewer directions and reflective polarizing films that recycle the polarized light that was formerly absorbed by the first polarizer of the LCD (invented by Philips researchers Adrianus de Vaan and Paulus Schaareman),
Due to the LCD layer that generates the desired high resolution images at flashing video speeds using very low power electronics in combination with LED based backlight technologies, LCD technology has become the dominant display technology for products such as televisions, desktop monitors, notebooks, tablets, smartphones and mobile phones. Although competing OLED technology is pushed to the market, such OLED displays do not feature the HDR capabilities like LCDs in combination with 2D LED backlight technologies have, reason why the annual market of such LCD-based products is still growing faster (in volume) than OLED-based products while the efficiency of LCDs (and products like portable computers, mobile phones and televisions) may even be further improved by preventing the light to be absorbed in the colour filters of the LCD.
A pink elastomeric connector mating an LCD panel to circuit board traces, shown next to a centimeter-scale ruler. The conductive and insulating layers in the black stripe are very small.
A standard television receiver screen, a modern LCD panel, has over six million pixels, and they are all individually powered by a wire network embedded in the screen. The fine wires, or pathways, form a grid with vertical wires across the whole screen on one side of the screen and horizontal wires across the whole screen on the other side of the screen. To this grid each pixel has a positive connection on one side and a negative connection on the other side. So the total amount of wires needed for a 1080p display is 3 x 1920 going vertically and 1080 going horizontally for a total of 6840 wires horizontally and vertically. That"s three for red, green and blue and 1920 columns of pixels for each color for a total of 5760 wires going vertically and 1080 rows of wires going horizontally. For a panel that is 28.8 inches (73 centimeters) wide, that means a wire density of 200 wires per inch along the horizontal edge.
The LCD panel is powered by LCD drivers that are carefully matched up with the edge of the LCD panel at the factory level. The drivers may be installed using several methods, the most common of which are COG (Chip-On-Glass) and TAB (Tape-automated bonding) These same principles apply also for smartphone screens that are much smaller than TV screens.anisotropic conductive film or, for lower densities, elastomeric connectors.
Monochrome and later color passive-matrix LCDs were standard in most early laptops (although a few used plasma displaysGame Boyactive-matrix became standard on all laptops. The commercially unsuccessful Macintosh Portable (released in 1989) was one of the first to use an active-matrix display (though still monochrome). Passive-matrix LCDs are still used in the 2010s for applications less demanding than laptop computers and TVs, such as inexpensive calculators. In particular, these are used on portable devices where less information content needs to be displayed, lowest power consumption (no backlight) and low cost are desired or readability in direct sunlight is needed.
A comparison between a blank passive-matrix display (top) and a blank active-matrix display (bottom). A passive-matrix display can be identified when the blank background is more grey in appearance than the crisper active-matrix display, fog appears on all edges of the screen, and while pictures appear to be fading on the screen.
Displays having a passive-matrix structure are employing Crosstalk between activated and non-activated pixels has to be handled properly by keeping the RMS voltage of non-activated pixels below the threshold voltage as discovered by Peter J. Wild in 1972,
STN LCDs have to be continuously refreshed by alternating pulsed voltages of one polarity during one frame and pulses of opposite polarity during the next frame. Individual pixels are addressed by the corresponding row and column circuits. This type of display is called response times and poor contrast are typical of passive-matrix addressed LCDs with too many pixels and driven according to the "Alt & Pleshko" drive scheme. Welzen and de Vaan also invented a non RMS drive scheme enabling to drive STN displays with video rates and enabling to show smooth moving video images on an STN display.
Bistable LCDs do not require continuous refreshing. Rewriting is only required for picture information changes. In 1984 HA van Sprang and AJSM de Vaan invented an STN type display that could be operated in a bistable mode, enabling extremely high resolution images up to 4000 lines or more using only low voltages.
High-resolution color displays, such as modern LCD computer monitors and televisions, use an active-matrix structure. A matrix of thin-film transistors (TFTs) is added to the electrodes in contact with the LC layer. Each pixel has its own dedicated transistor, allowing each column line to access one pixel. When a row line is selected, all of the column lines are connected to a row of pixels and voltages corresponding to the picture information are driven onto all of the column lines. The row line is then deactivated and the next row line is selected. All of the row lines are selected in sequence during a refresh operation. Active-matrix addressed displays look brighter and sharper than passive-matrix addressed displays of the same size, and generally have quicker response times, producing much better images. Sharp produces bistable reflective LCDs with a 1-bit SRAM cell per pixel that only requires small amounts of power to maintain an image.
Segment LCDs can also have color by using Field Sequential Color (FSC LCD). This kind of displays have a high speed passive segment LCD panel with an RGB backlight. The backlight quickly changes color, making it appear white to the naked eye. The LCD panel is synchronized with the backlight. For example, to make a segment appear red, the segment is only turned ON when the backlight is red, and to make a segment appear magenta, the segment is turned ON when the backlight is blue, and it continues to be ON while the backlight becomes red, and it turns OFF when the backlight becomes green. To make a segment appear black, the segment is always turned ON. An FSC LCD divides a