big lcd monitors free sample

Unused electronics are the bane of the modern life. Perfectly functional gadgets sit quietly in a corner of the store room, doing nothing. If you"re wondering what to do with old computer monitors, here are a few easy ideas to repurpose unused screens.

Perhaps the best thing to do with an old flat-screen monitor is a DIY DAKboard. The DAKboard is a LCD wall display that shows the current time, weather forecast, calendar events, stock quotes, fitness data, and news headlines. It"s all displayed on a soothing photo. You could buy an official DAKboard, but the makers themselves have shown how to build your own wall display with a Raspberry Pi. when you can build one for far less money and a little geeky fun, the choice is obvious.

Basically, you will be cutting out the polarizing film of the old LCD monitor. This film will then be put on a simple pair of glasses. Now your screen appears white, but the glasses can "see" the content. It"s one of the best ways to keep prying eyes out of your PC.

If you have a broken old LCD monitor, it can be re-purposed into a usable mirror; but if you have a working old LCD monitor, adding a Raspberry Pi can turn it into a smart magic mirror!

If you"re on a tight budget for a first-time DIY project, consider the $100 smart mirror. It"s not the best version of turning an LCD monitor into a smart mirror, but you"ll get the basic features and not spend a bomb.

All desktop operating systems support the ability to use dual monitors. It"s pretty easy to setup dual monitors on Windows, and you can then customize how you use the two spaces. To connect two monitors, you will likely need a graphics card with multiple HDMI ports, or use an HDMI and a VGA port on desktops.

Like any gadget, monitors have a limited shelf life. If you"re looking to upgrade, you now have a few ideas of what to do with your old monitor. And that age should influence which project you chose. For example, given the effort involved in building a smart mirror, don"t go with a screen that"s already shown signs of trouble. The Raspberry Pi-based projects are usually the easiest to keep changing.

Established in 2010, Topfoison has devoted itself to the manufacturing and development of high-quality products for the Wearable device, Smart Watch, VR, Medical device, Industrial LCD display including Color LCD modules/OLED/LCD display/Round lcd screen/Round AMOLED/ Square transflective lcd screen/ IPS full wide display/ 1080p fhd AMOLED and 2K 1440p lcd. Topfoison focus on1.22-7.0 inch small size displays, all the products produced in our company enjoys the most advanced production craft and technology as well as the strictly ISO quality management system.

We previously recommended an older version of this display, the Asus ProArt PA247CV, as a top pick in this guide. Both monitors are fantastic, but the newer PA248CNV offers a larger, more accurate display and a higher charging wattage for only around $40 more, an extra expense that we think is worth paying. If the PA248CNV is out of stock or has jumped in price when you’re shopping, or if you don’t have a high-powered laptop that requires 90 W charging, we recommend getting the PA247CV instead.

If you’ve been reading our other monitor guides lately, you might notice that this is the 24-inch version of the top pick in our guide to the best 27-inch monitors. Although many home-use displays under $500 have fallen short of their advertised color accuracy, contrast, and brightness in our tests, we’ve found that the ProArt line often lives up to its claims (or at least gets much closer than the competition). It also prioritizes features that are essential, such as USB-C charging for laptop owners and sturdy, adjustable stands.

We generally like this monitor and haven’t found issues with it. However, as we mention in our How we picked and tested section, if you’re planning on using this monitor as your main work display, you might want to consider a higher-resolution 27-inch monitor. (Our top pick in our guide to the best 27-inch monitors is just a larger, higher-resolution version of this same monitor.) On that kind of monitor, you have more screen space, and text is a bit sharper and easier to read. But if you’re already working on a 1080p laptop screen or monitor and satisfied with the image quality, that’s great! The Asus ProArt PA248CNV will be a quality replacement or upgrade.

You use it for work. You use it for gaming. You use it to access Netflix, YouTube, and your ex’s HBO account. It’s your computer monitor, and opting for a model that fits you and your needs is crucial. Whether your old display has died or you’ve decided that you need to upgrade to take advantage of the latest software, buying a new monitor is a big decision.

How big is big enough? When it comes to computer monitors, you want something that can fit comfortably on your desk while giving you plenty of screen real estate. While in the past sub-20-inch monitors were commonplace, today, unless you’re really constrained for space, there’s no real need to buy anything under 22 inches. For most, 24 inches is going to be a baseline, as you can pick up a number of screens at that size for around $100, and they look fantastic at 1080p.

For those who want more than that, though, there are plenty of sizes to choose from. Monitors that stretch 27 inches diagonally are increasingly popular, and there are plenty of options beyond 30 inches that are affordable. If you want to go extreme, we’ve even tried some great computer monitors that get close to 50 inches, like Samsung’s CHG90.

While you’ll need to sit well back from those, there’s no denying that they look amazing. They give you the same screen as multiple smaller monitors without a bezel dividing them down the middle. They tend to be rather expensive, though, and if you go really wide, you’ll struggle to find media that can display at close to its native resolution, leaving the picture to either look stretched or surrounded by black.

Anywhere between 24 and 30 inches is going to be perfectly fine for most users. They let you make the most of modern resolutions and color clarity, and they also fit a couple of different web pages open at the same time without needing to use two monitors, which is handy for many professionals. They don’t tend to be too expensive at that size, either, unless you opt for the top-end models.

Today, all the best screens are still LCD monitors that use LED technology for a slim product that saves energy while providing ideal backlighting. We’ve been waiting years for OLED technology to make the transition to PC monitors, it isfinally beginning thanks to brands like LG, but the technology is still relatively rare.

One aspect of PC monitors that you do need to consider, though, is resolution. While 1080p was once the gold standard, today, it’s just the baseline. If you’re happy to spend a little more, there are a few other options worth considering, especially if you want to improve screen space or gaming visuals. Resolution isn’t the be-all and end-all of monitor features, though. In fact, too much resolution on too small of a screen can often be annoying because it shrinks all images down and forces you to enlarge everything to easily read it.

1080p: If you want reasonable clarity, but want to save on cost or focus on other, more important features, 1080p is where it’s at — as long as the monitor you’re buying isn’t extremely large. 1080p is ideal for 21-inch to 24-inch displays. These monitors offer great picture quality, and now that they are competing with 4K, the prices are rock-bottom. If you want to go larger than 24 inches, though, you should consider 2,560 x 1,440 resolution at the least and perhaps 4K.

4K/Ultra HD (UHD): 4K is the resolution that the industry is most keen to drive consumers towards. It looks much more detailed than 1080p with 3,840 x 2,160 pixels, and prices have come down substantially in the past few years. That said, gamers will need a powerful graphics card to run a system at this resolution, and finding affordable monitors with full suites of frame synching support or high-refresh rates is still difficult. There is plenty of 4K media out there to enjoy, though, whether you’re streaming or using UHD Blu-rays.

5K:This resolution made headlines when Apple debuted it on its iMac, but it’s far from a common resolution even years later. Dell’s UP2715K is a great-looking display, but we would recommend many high-end 4K monitors before it, as you won’t be able to see too much difference between them.

8K: There are some 8K monitors available as well, notably Dell’s 8K Ultrasharp. There’s not really any need for a monitor with such a high resolution at this time, but they are available for those with the budget if resolution is absolutely the most important thing.

While the above are the most common resolutions you’ll find on monitors, some fall into more niche categories. The best ultrawide monitors offer unique aspect ratios and resolutions with broad horizontal pixel counts, but less on the vertical dimension.

Aspect ratio: The aspect the screen shows images in (length compared to height). A common standard, and your best bet, is 16:9. It works with plenty of content, and it’s great for movies or games. Some fancy monitors like to stretch things out with ratios like 21:9, but that is more suitable for unusual work situations or hardcore gaming. Another common format, 16:10, provides slightly more vertical space for viewing multiple open documents or images. 3:2 is becoming more commonplace in laptops for better web viewing, but that’s rare on stand-alone displays.

Brightness: High-end monitors these days have brightness around 300 to 350 cd/m2. Extra brightness may be handy if you work in a well-lit room or next to large windows. However, too much brightness is a recipe for eye strain. As long as brightness options reach 250 cd/m2, your monitor is good to go. That said, if you want one with HDR support, the more peak brightness, the better to best take advantage of that technology.

HDR: High dynamic range, or HDR, is a recent addition to the PC monitor space and can have a dramatic impact on visuals. However, most PC monitors lack the brightness needed to take full advantage of it, and even the best ones don’t look as good as they should. Keep in mind there are a variety of HDR versions to consider, like HDR10+, for more advanced content.

Refresh rate: Rated in hertz (Hz), a monitor’s refresh rate is how often it updates the image on your screen. While most support up to 60Hz, some displays now offer much higher refresh rates. That can result in smoother movements on your desktop and support for higher frame rates in games, which can make a big difference in high-paced titles by reducing your input lag. 120Hz to 144Hz is a great range to target, but you could opt for the fastest screens out there with up to 240Hz support. Just make sure you have a high-powered graphics card to back it up.

IPS: Displays with IPS panels tend to be the most expensive of the bunch, but what you get for your money is much richer colors and clear viewing angles that are near horizontal. The downside of IPS panels is that they don’t tend to have as fast response times as TN displays, so some consider them inferior for gaming. There are, however, gaming IPS displays, like the fantastic Asus PG279Q, which make good ground on their TN counterparts. Some IPS monitors suffer from quality control issues, though, and most IPS displays have a telltale glow when displaying dark images due to backlight bleeding.

There are also curved monitors to consider. They don’t have different resolutions than their flat counterparts, but present a concave curved screen, which can make a difference to the experience and tasks they’re best suited for.

They have a narrow field of view, and aren’t that great for group watching. Fortunately, this is less of an issue on monitors, which tend to have an audience of one.

To run a display at 4K resolution, you’ll need to use HDMI 1.4 at the very least, though HDMI 2.0 would be required if you want to support a refresh rate of 60Hz, which should be a bare minimum unless all you do is watch movies on it (with HDMI 2.1 being the newest version of the standard). If you want to do high refresh rate gaming, especially at higher resolutions, DisplayPort 1.4 monitors can handle up to 8K at 60Hz and 4K at up to 200Hz, so they’re better suited than HDMI in that regard. DisplayPort 2.0 is also on the way.

The slightly older, DisplayPort 1.2 connector can handle 1440p and 1080p at high refresh rates, too, so if you’re not opting for 4K, that port option should suffice for lower-resolution monitors. USB-C is an option, as it can support up to 4K resolution, but it’s not as capable as DisplayPort connections.

We recommend picking a monitor that is easy to use, especially if you’re building a complex setup with more than one monitor. Think about adding a stand that you can tilt or rotate to achieve the perfect monitor angle. Some monitors even let you adjust tilt and rotation with one hand.

Built-in controls to navigate through the monitor’s menu and select different monitor modes are an interesting feature, but they shouldn’t feel clunky. Pay attention to port placement and cable management features to connect your new monitor in a neat and tidy manner. Some monitors go an extra step and include charging ports along the base or even turn the monitor base into a wireless charging pad for your phone.

The most common computer monitors are compact enough to sit on a table, desk, or stand. However, if you’re in the market for an enormous monitor, the most space-efficient choice is to mount the monitor onto a wall, thereby freeing up precious floor space. In this case, look for monitors thatcome with VESA standard mountingoptions or which are compatible with them. That way, you’ll have a larger selection of mounting arms from a variety of manufacturers to choose from, rather than being limited by specific mounting options.

You may use your monitor to hold video chats with friends or for business conferences. You have two main options for video communication, namely a built-in webcam or an independent camera, with marked differences that provide benefits according to your needs. Many monitors, especially high-quality models, come with an integrated webcam.

One of the largest recycling problems faced by most countries comes down to the sheer volume of computer electronics that are obsolete and outdated. With technology advances showing no signs of slowing down, it"s no wonder that businesses and home users are constantly upgrading computer monitors.

The first thing that"s important to understand is how big of a problem electronics are. With people replacing phones every year and computers every few years, it shouldn"t come as a surprise that there are mountains of discarded electronics every year.

When e-waste like monitors isn"t properly handled at the end of its life, then exposure to the natural elements alone can cause many of the toxic materials to break down and evaporate into the air.

But even modern LCD monitors contain many different metals and chemicals that are perfectly safe when they are contained. But even small amounts of them in the open air canseriously damage animals, plants, and humans.

When monitors and other computer electronics are illegally dumped, or they end up at a landfill, then all those metals like lead, mercury, and cadmium can ultimately release due to heat, cold, and moisture exposure.

OK, now that you know that those old monitors in the garage or basement could be a health hazard and that the right thing to do is to recycle computer monitors, it"s time to go through this simple process.

Make sure that your old computer monitors are safely placed in your trunk so that they avoid falling or rolling around. Those external plastics won"t stand up to much force, and you can quickly damage internal components that contain the heavy metals.

The recycling process for computers and monitors starts with carefully taking apart the electronics into their individual components. There are plenty of plastics, and then there"s the glass and multiple circuit boards.

While they might not take care of the overall breakdown of the materials, many of them do offer to take back old computer monitors, printers, hard drives, phones, and laptops for free or a nominal fee.

Many major electronics stores now offer a recycling program where you can drop off computers, laptops, TVs, monitors, and anything electrical that you bought there.

This should be your first option if you have computer monitors that are relatively modern and still in working order. Many charities and Goodwill stores will happily accept electronics that could help out people with little financial means.

If you"re in the San Francisco Bay Area and have some old monitors from personal home use, then GreenCitizen offers a free drop-off service . And the process couldn"t be any easier.

Then weigh the fee items and fill out the mail-in recycling form. All that"s left is to pay the fee online and receive the shipping instructions. You can then use your preferred shipping company to have your old computer monitors and other equipment sent to the recycling center.

Yes, old CRT monitors can be recycled. In most cases, it"s not possible to reuse them with modern computers, but they contain toxic metals that should end up in the trash or landfill.

The penalty for not recycling old computer monitors is different from state to state and county to county. In many cases, it ranges from $50 to several hundred dollars, which should be enough incentive not to throw it in the trash.

Yes, a monitor can store data. This is typically more common with smart TVs, but some monitors also have similar functions that could store login details for streaming services. It"s important that you use a data destruction service for such devices.

The display in modern monitors is typically an LCD with LED backlight, having by the 2010s replaced CCFL backlit LCDs. Before the mid-2000s,CRT. Monitors are connected to the computer via DisplayPort, HDMI, USB-C, DVI, VGA, or other proprietary connectors and signals.

Originally, computer monitors were used for data processing while television sets were used for video. From the 1980s onward, computers (and their monitors) have been used for both data processing and video, while televisions have implemented some computer functionality. In the 2000s, the typical display aspect ratio of both televisions and computer monitors has changed from 4:3 to 16:9.

Modern computer monitors are mostly interchangeable with television sets and vice versa. As most computer monitors do not include integrated speakers, TV tuners, nor remote controls, external components such as a DTA box may be needed to use a computer monitor as a TV set.

Early electronic computer front panels were fitted with an array of light bulbs where the state of each particular bulb would indicate the on/off state of a particular register bit inside the computer. This allowed the engineers operating the computer to monitor the internal state of the machine, so this panel of lights came to be known as the "monitor". As early monitors were only capable of displaying a very limited amount of information and were very transient, they were rarely considered for program output. Instead, a line printer was the primary output device, while the monitor was limited to keeping track of the program"s operation.

Multiple technologies have been used for computer monitors. Until the 21st century most used cathode-ray tubes but they have largely been superseded by LCD monitors.

The first computer monitors used cathode-ray tubes (CRTs). Prior to the advent of home computers in the late 1970s, it was common for a video display terminal (VDT) using a CRT to be physically integrated with a keyboard and other components of the workstation in a single large chassis, typically limiting them to emulation of a paper teletypewriter, thus the early epithet of "glass TTY". The display was monochromatic and far less sharp and detailed than on a modern monitor, necessitating the use of relatively large text and severely limiting the amount of information that could be displayed at one time. High-resolution CRT displays were developed for specialized military, industrial and scientific applications but they were far too costly for general use; wider commercial use became possible after the release of a slow, but affordable Tektronix 4010 terminal in 1972.

By the end of the 1980s color progressive scan CRT monitors were widely available and increasingly affordable, while the sharpest prosumer monitors could clearly display high-definition video, against the backdrop of efforts at HDTV standardization from the 1970s to the 1980s failing continuously, leaving consumer SDTVs to stagnate increasingly far behind the capabilities of computer CRT monitors well into the 2000s. During the following decade, maximum display resolutions gradually increased and prices continued to fall as CRT technology remained dominant in the PC monitor market into the new millennium, partly because it remained cheaper to produce.

There are multiple technologies that have been used to implement liquid-crystal displays (LCD). Throughout the 1990s, the primary use of LCD technology as computer monitors was in laptops where the lower power consumption, lighter weight, and smaller physical size of LCDs justified the higher price versus a CRT. Commonly, the same laptop would be offered with an assortment of display options at increasing price points: (active or passive) monochrome, passive color, or active matrix color (TFT). As volume and manufacturing capability have improved, the monochrome and passive color technologies were dropped from most product lines.

The first standalone LCDs appeared in the mid-1990s selling for high prices. As prices declined they became more popular, and by 1997 were competing with CRT monitors. Among the first desktop LCD computer monitors was the Eizo FlexScan L66 in the mid-1990s, the SGI 1600SW, Apple Studio Display and the ViewSonic VP140vision science remain dependent on CRTs, the best LCD monitors having achieved moderate temporal accuracy, and so can be used only if their poor spatial accuracy is unimportant.

High dynamic range (HDR)television series, motion pictures and video games transitioning to widescreen, which makes squarer monitors unsuited to display them correctly.

Organic light-emitting diode (OLED) monitors provide most of the benefits of both LCD and CRT monitors with few of their drawbacks, though much like plasma panels or very early CRTs they suffer from burn-in, and remain very expensive.

Radius of curvature (for curved monitors) - is the radius that a circle would have if it had the same curvature as the display. This value is typically given in millimeters, but expressed with the letter "R" instead of a unit (for example, a display with "3800R curvature" has a 3800mm radius of curvature.

Dot pitch represents the distance between the primary elements of the display, typically averaged across it in nonuniform displays. A related unit is pixel pitch, In LCDs, pixel pitch is the distance between the center of two adjacent pixels. In CRTs, pixel pitch is defined as the distance between subpixels of the same color. Dot pitch is the reciprocal of pixel density.

Pixel density is a measure of how densely packed the pixels on a display are. In LCDs, pixel density is the number of pixels in one linear unit along the display, typically measured in pixels per inch (px/in or ppi).

Contrast ratio is the ratio of the luminosity of the brightest color (white) to that of the darkest color (black) that the monitor is capable of producing simultaneously. For example, a ratio of 20,000∶1 means that the brightest shade (white) is 20,000 times brighter than its darkest shade (black). Dynamic contrast ratio is measured with the LCD backlight turned off. ANSI contrast is with both black and white simultaneously adjacent onscreen.

Color depth - measured in bits per primary color or bits for all colors. Those with 10bpc (bits per channel) or more can display more shades of color (approximately 1 billion shades) than traditional 8bpc monitors (approximately 16.8 million shades or colors), and can do so more precisely without having to resort to dithering.

Refresh rate is (in CRTs) the number of times in a second that the display is illuminated (the number of times a second a raster scan is completed). In LCDs it is the number of times the image can be changed per second, expressed in hertz (Hz). Determines the maximum number of frames per second (FPS) a monitor is capable of showing. Maximum refresh rate is limited by response time.

On two-dimensional display devices such as computer monitors the display size or view able image size is the actual amount of screen space that is available to display a picture, video or working space, without obstruction from the bezel or other aspects of the unit"s design. The main measurements for display devices are: width, height, total area and the diagonal.

With the introduction of flat panel technology, the diagonal measurement became the actual diagonal of the visible display. This meant that an eighteen-inch LCD had a larger viewable area than an eighteen-inch cathode-ray tube.

Until about 2003, most computer monitors had a 4:3 aspect ratio and some had 5:4. Between 2003 and 2006, monitors with 16:9 and mostly 16:10 (8:5) aspect ratios became commonly available, first in laptops and later also in standalone monitors. Reasons for this transition included productive uses (i.e. besides Field of view in video games and movie viewing) such as the word processor display of two standard letter pages side by side, as well as CAD displays of large-size drawings and application menus at the same time.LCD monitors and the same year 16:10 was the mainstream standard for laptops and notebook computers.

In 2011, non-widescreen displays with 4:3 aspect ratios were only being manufactured in small quantities. According to Samsung, this was because the "Demand for the old "Square monitors" has decreased rapidly over the last couple of years," and "I predict that by the end of 2011, production on all 4:3 or similar panels will be halted due to a lack of demand."

The resolution for computer monitors has increased over time. From 280 × 192 during the late 1970s, to 1024 × 768 during the late 1990s. Since 2009, the most commonly sold resolution for computer monitors is 1920 × 1080, shared with the 1080p of HDTV.2560 × 1600 at 30 in (76 cm), excluding niche professional monitors. By 2015 most major display manufacturers had released 3840 × 2160 (4K UHD) displays, and the first 7680 × 4320 (8K) monitors had begun shipping.

Most modern monitors will switch to a power-saving mode if no video-input signal is received. This allows modern operating systems to turn off a monitor after a specified period of inactivity. This also extends the monitor"s service life. Some monitors will also switch themselves off after a time period on standby.

Most modern monitors have two different indicator light colors wherein if video-input signal was detected, the indicator light is green and when the monitor is in power-saving mode, the screen is black and the indicator light is orange. Some monitors have different indicator light colors and some monitors have blinking indicator light when in power-saving mode.

Many monitors have other accessories (or connections for them) integrated. This places standard ports within easy reach and eliminates the need for another separate hub, camera, microphone, or set of speakers. These monitors have advanced microprocessors which contain codec information, Windows interface drivers and other small software which help in proper functioning of these functions.

Monitors that feature an aspect ratio greater than 2:1 (for instance, 21:9 or 32:9, as opposed to the more common 16:9, which resolves to 1.77:1).Monitors with an aspect ratio greater than 3:1 are marketed as super ultrawide monitors. These are typically massive curved screens intended to replace a multi-monitor deployment.

These monitors use touching of the screen as an input method. Items can be selected or moved with a finger, and finger gestures may be used to convey commands. The screen will need frequent cleaning due to image degradation from fingerprints.

Some displays, especially newer flat panel monitors, replace the traditional anti-glare matte finish with a glossy one. This increases color saturation and sharpness but reflections from lights and windows are more visible. Anti-reflective coatings are sometimes applied to help reduce reflections, although this only partly mitigates the problem.

Most often using nominally flat-panel display technology such as LCD or OLED, a concave rather than convex curve is imparted, reducing geometric distortion, especially in extremely large and wide seamless desktop monitors intended for close viewing range.

Newer monitors are able to display a different image for each eye, often with the help of special glasses and polarizers, giving the perception of depth. An autostereoscopic screen can generate 3D images without headgear.

Raw monitors are raw framed LCD monitors, to install a monitor on a not so common place, ie, on the car door or you need it in the trunk. It is usually paired with a power adapter to have a versatile monitor for home or commercial use.

A stowable rack mount monitor is 1U, 2U or 3U high and is mounted on rack slides allowing the display to be folded down and the unit slid into the rack for storage as a drawer. The flat display is visible only when pulled out of the rack and deployed. These units may include only a display or may be equipped with a keyboard creating a KVM (Keyboard Video Monitor). Most common are systems with a single LCD but there are systems providing two or three displays in a single rack mount system.

An open frame monitor provides the display and enough supporting structure to hold associated electronics and to minimally support the display. Provision will be made for attaching the unit to some external structure for support and protection. Open frame monitors are intended to be built into some other piece of equipment providing its own case. An arcade video game would be a good example with the display mounted inside the cabinet. There is usually an open frame display inside all end-use displays with the end-use display simply providing an attractive protective enclosure. Some rack mount monitor manufacturers will purchase desktop displays, take them apart, and discard the outer plastic parts, keeping the inner open-frame display for inclusion into their product.

Van Eck phreaking is the process of remotely displaying the contents of a CRT or LCD by detecting its electromagnetic emissions. It is named after Dutch computer researcher Wim van Eck, who in 1985 published the first paper on it, including proof of concept. Phreaking more generally is the process of exploiting telephone networks.

Masoud Ghodrati, Adam P. Morris, and Nicholas Seow Chiang Price (2015) The (un)suitability of modern liquid crystal displays (LCDs) for vision research. Frontiers in Psychology, 6:303.

Before the widespread use of PCs, a computer that could fit on a desk was remarkably small, leading to the "desktop" nomenclature. More recently, the phrase usually indicates a particular style of computer case. Desktop computers come in a variety of styles ranging from large vertical tower cases to small models which can be tucked behind or rest directly beneath (and support) LCD monitors.

While the term "desktop" often refers to a computer with a vertically aligned computer tower case, these varieties often rest on the ground or underneath desks. Despite this seeming contradiction, the term "desktop" does typically refer to these vertical tower cases as well as the horizontally aligned models which are designed to literally rest on top of desks and are therefore more appropriate to the "desktop" term, although both types qualify for this "desktop" label in most practical situations aside from certain physical arrangement differences. Both styles of these computer cases hold the systems hardware components such as the motherboard, processor chip and other internal operating parts. Desktop computers have an external monitor with a display screen and an external keyboard, which are plugged into ports on the back of the computer case. Desktop computers are popular for home and business computing applications as they leave space on the desk for multiple monitors.

An all-in-one computer (also known as single-unit PCs) is a desktop computer that combines the monitor and processor within a single unit. A separate keyboard and mouse are standard input devices, with some monitors including touchscreen capability. The processor and other working components are typically reduced in size relative to standard desktops, located behind the monitor, and configured similarly to laptops.

The development of thin plasma display and LCD screens permitted a somewhat smaller form factor, called the "lunchbox" computer. The screen formed one side of the enclosure, with a detachable keyboard and one or two half-height floppy disk drives, mounted facing the ends of the computer. Some variations included a battery, allowing operation away from AC outlets.

Notebook computers such as the TRS-80 Model 100 and Epson HX-20 had roughly the plan dimensions of a sheet of typing paper (ANSI A or ISO A4). These machines had a keyboard with slightly reduced dimensions compared to a desktop system, and a fixed LCD display screen coplanar with the keyboard. These displays were usually small, with 8 to 16 lines of text, sometimes only 40 columns line length. However, these machines could operate for extended times on disposable or rechargeable batteries. Although they did not usually include internal disk drives, this form factor often included a modem for telephone communication and often had provisions for external cassette or disk storage. Later, clam-shell format laptop computers with similar small plan dimensions were also called "notebooks".

LCD display doesn’t operate the same way as CRT displays , which fires electrons at a glass screen, a LCD display has individual pixels arranged in a rectangular grid. Each pixel has RGB(Red, Green, Blue) sub-pixel that can be turned on or off. When all of a pixel’s sub-pixels are turned off, it appears black. When all the sub-pixels are turned on 100%, it appears white. By adjusting the individual levels of red, green, and blue light, millions of color combinations are possible

The pixels of the LCD screen were made by circuitry and electrodes of the backplane. Each sub-pixel contains a TFT (Thin Film Transistor) element.  These structures are formed by depositing various materials (metals and silicon) on to the glass substrate that will become one part of the complete display “stack,” and then making them through photolithography. For more information about TFT LCDs, please refer to “

The etched pixels by photolith process are the Native Resolution. Actually, all the flat panel displays, LCD, OLED, Plasma etc.) have native resolution which are different from CRT monitors

Although we can define a LCD display with resolution, a Full HD resolution on screen size of a 15” monitor or a 27” monitor will show different. The screen “fineness” is very important for some application, like medical, or even our cell phone. If the display “fineness” is not enough, the display will look “pixelized” which is unable to show details.

But you see other lower resolution available, that is because video cards are doing the trick. A video card can display a lower LCD screen resolution than the LCD’s built-in native resolution. The video cards can combine the pixels and turn a higher resolution into lower resolution, or just use part of the full screen. But video cards can’t do the magic to exceed the native resolution.

Aspect Ratio:  You might hear 4:3 which is full screen, 16:9 is for widescreen; 21:9 is for ultrawide computer monitors and televisions, as well as cinematic widescreen projectors. Some ultrawide monitors are trying to replace dual monitor.

Circuit City customers can trade-in any qualifying consumer electronic product including PCs, laptops, servers, computer monitors, digital cameras, camcorders, multimedia projectors, audio receivers, game systems, mobile phones, PDAs, ipods and GPS navigation systems and recieve payment. Payment can be made in cash, PayPal, donations to charities and other options.

Sam’s Club members may trade or recycle any qualifying consumer electronic product through the Trade-In and Recycling Program, Electronic products accepted for trade-in include PCs, laptops, LCD monitors, digital cameras, camcorders, game systems, printers and MP3 players.