working principle of lcd display pricelist

To create an LCD, you take two pieces ofpolarized glass. A special polymer that creates microscopic grooves in the surface is rubbed on the side of the glass that does not have the polarizing film on it. The grooves must be in the same direction as the polarizing film. You then add a coating of nematic liquid crystals to one of the filters. The grooves will cause the first layer of molecules to align with the filter"s orientation. Then add the second piece of glass with the polarizing film at a right angle to the first piece. Each successive layer of TN molecules will gradually twist until the uppermost layer is at a 90-degree angle to the bottom, matching the polarized glass filters.

As light strikes the first filter, it is polarized. The molecules in each layer then guide the light they receive to the next layer. As the light passes through the liquid crystal layers, the molecules also change the light"s plane of vibration to match their own angle. When the light reaches the far side of the liquid crystal substance, it vibrates at the same angle as the final layer of molecules. If the final layer is matched up with the second polarized glass filter, then the light will pass through.

If we apply an electric charge to liquid crystal molecules, they untwist. When they straighten out, they change the angle of the light passing through them so that it no longer matches the angle of the top polarizing filter. Consequently, no light can pass through that area of the LCD, which makes that area darker than the surrounding areas.

Building a simple LCD is easier than you think. Your start with the sandwich of glass and liquid crystals described above and add two transparent electrodes to it. For example, imagine that you want to create the simplest possible LCD with just a single rectangular electrode on it. The layers would look like this:

The LCD needed to do this job is very basic. It has a mirror (A) in back, which makes it reflective. Then, we add a piece of glass (B) with a polarizing film on the bottom side, and a common electrode plane (C) made of indium-tin oxide on top. A common electrode plane covers the entire area of the LCD. Above that is the layer of liquid crystal substance (D). Next comes another piece of glass (E) with an electrode in the shape of the rectangle on the bottom and, on top, another polarizing film (F), at a right angle to the first one.

The electrode is hooked up to a power source like a battery. When there is no current, light entering through the front of the LCD will simply hit the mirror and bounce right back out. But when the battery supplies current to the electrodes, the liquid crystals between the common-plane electrode and the electrode shaped like a rectangle untwist and block the light in that region from passing through. That makes the LCD show the rectangle as a black area.

Photo: A trick of the polarized light: rotate one pair of polarizing sunglasses past another and you can block out virtually all the light that normally passes through.

Photo: A less well known trick of polarized light: it makes crystals gleam with amazing spectral colors due to a phenomenon called pleochroism. Photo of protein and virus crystals, many of which were grown in space. Credit: Dr. Alex McPherson, University of California, Irvine. Photo courtesy of NASA Marshall Space Flight Center (NASA-MSFC).

Photo: Prove to yourself that an LCD display uses polarized light. Simply put on a pair of polarizing sunglasses and rotate your head (or the display). You"ll see the display at its brightest at one angle and at its darkest at exactly 90 degrees to that angle.

Photo: How liquid crystals switch light on and off. In one orientation, polarized light cannot pass through the crystals so they appear dark (left side photo). In a different orientation, polarized light passes through okay so the crystals appear bright (right side photo). We can make the crystals change orientation—and switch their pixels on and off—simply by applying an electric field. Photo from liquid crystal research by David Weitz courtesy of NASA Marshall Space Flight Center (NASA-MSFC).

Liquid crystal refers to the intermediate status of a substance between solid (crystal) and liquid. When crystals with a high level of order in molecular sequence are melted, they generally turn liquid, which has fluidity but no such order at all. However, thin bar-shaped organic molecules, when they are melted, keep their order in a molecular direction although they lose it in molecular positions. In the state in which molecules are in a uniform direction, they also have refractive indices, dielectric constants and other physical characteristics similar to those of crystals, depending on their direction, even though they are liquid. This is why they are called liquid crystal. The diagram below shows the structure of 5CB (4-pentyl-4’-Cyanobiphenyl) as an example of liquid crystal molecules.

A liquid crystal display (LCD) has liquid crystal material sandwiched between two sheets of glass. Without any voltage applied between transparent electrodes, liquid crystal molecules are aligned in parallel with the glass surface. When voltage is applied, they change their direction and they turn vertical to the glass surface. They vary in optical characteristics, depending on their orientation. Therefore, the quantity of light transmission can be controlled by combining the motion of liquid crystal molecules and the direction of polarization of two polarizing plates attached to the both outer sides of the glass sheets. LCDs utilize these characteristics to display images.

An LCD consists of many pixels. A pixel consists of three sub-pixels (Red/Green/Blue, RGB). In the case of Full-HD resolution, which is widely used for smartphones, there are more than six million (1,080 x 1,920 x 3 = 6,220,800) sub-pixels. To activate these millions of sub-pixels a TFT is required in each sub-pixel. TFT is an abbreviation for "Thin Film Transistor". A TFT is a kind of semiconductor device. It serves as a control valve to provide an appropriate voltage onto liquid crystals for individual sub-pixels. A TFT LCD has a liquid crystal layer between a glass substrate formed with TFTs and transparent pixel electrodes and another glass substrate with a color filter (RGB) and transparent counter electrodes. In addition, polarizers are placed on the outer side of each glass substrate and a backlight source on the back side. A change in voltage applied to liquid crystals changes the transmittance of the panel including the two polarizing plates, and thus changes the quantity of light that passes from the backlight to the front surface of the display. This principle allows the TFT LCD to produce full-color images.

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.

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.

The liquid crystals inside the monitor are electrically charged to particular levels after which they will either allow or prevent light from passing through the crystals. This light is then projected onto the pixels, displaying the image.

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

One of the more interesting things about old calculators is how they displayed their numbers. As easy as it seems today, in the late 60s and early 70s it was quite hard to devise a display system for a calculator, especially a

The Cathode Ray Tube (CRT) was developed for television in the 40s. The CRT shoots a focused electron beam from the back of the tube to the front of the tube. The front of the tube is coated

with phosphors that glow when they are struck by the electron beam. An image is created by moving the electron beam back and forth across the back of the screen. The beam moves in a

pattern from left to right, top to bottom and then it repeats. Each time the beam makes a pass across the screen, it lights up phosphor dots on the inside of the glass tube, thereby illuminating

the active portions of the screen. The intensity of the beam is modulated thus causing the screen phosphors to glow with different intensities or to even not glow at all. The desired images to be

displayed are actually retraced between 30 to 70 times each second. This keeps the images continually refreshed in the glowing screen phosphors without a flicker being perceivable to the eye.

The electron beam is generated from a filament and electrically charged cathode in the back neck of the CRT. The electron beam is first passed through a control grid. The control grid modulates

the intensity of the electron beam. The higher the intensity the brighter the phosphor dot it strikes will glow. Next the beam passes through an accelerating electrode, this will speed up the

electron beam. Then the beam passes through a focusing anode. This will focus or tighten the stream of electrons. All of these elements comprise the electron gun structure housed in the neck of the CRT.

The structure on the neck of the CRT is the yoke. The yoke contains four electromagnets placed around the neck of the CRT in 90 degree increments. By varying the voltage of these four

electromagnets, the electron beam can be deflected or bent to reach any location on the phosphor coated screen. A final stage of acceleration is achieved with the high voltage anode.

The familiar suction cup wire that attaches to the side of the CRT is connected to this anode. This anode is often a metalized surface on the inside of the picture tube. Many thousands of volts are

screens. Additional circuitry in the calculator can create numbers, letters, and other symbols by using the control grid to turn the electron beam on and off, while simultaneously using the

In a Nixie Tube display each numeral is a complete, lighted cathode in the shape of the numeral. The cathodes are stacked so that different numerals appear at different depths, unlike a planar

display in which all numerals are on the same plane relative to the viewer. The anode is a transparent metal mesh wrapped around the front of the display. The tube is filled with the inert

gas neon with a small amount of mercury. When an electric potential of 180 to 200 volts DC is applied between the anode and any cathode, the gas near the cathode breaks down and glows. The digits glow with a orange-red color.

The name Nixie came about accidentally. A [Burroughs] draftsman making drawings of the device labeled it NIX I, for Numeric Indicator eXperimental No. 1. His colleagues began referring to it as "Nixie," and the name stuck (

Interestingly enough the Nixie design is considered "failsafe". If a filament (cathode) fails, the numeral is not illuminated. Whereas, in a seven-segment display if one segment fails, a number

An Incandescent Filament display is usually housed in a vacuum tube like the either the Nixie tube or the early Vacuum Fluorescent tubes. This display is typically a seven segment style of

display where each display segment is formed with a conductive anode tungsten filament. A small voltage placed across a filament will cause it to heat to incandescence. They emit a yellowish

-white light that can be filtered to any desired color. The filament voltage (3-5vdc) can also be varied to change the brightness level of the display. The biggest problem with Incandescent

displays is they have a slow response time and they consume a large amount of current. A popular version of this type of display was the RCA Numitron. Some early electronic kits used the Incandescent Filament display.

A Planar Gas Discharge or Plasma Display Panels (PDP) display utilizes the same principle the Nixie tube does. It"s construction consists of sandwiching a hollow center layer filled with neon

and a small amount of mercury between a glass front and a ceramic back. A thick conductive paint forms the Cathodes on the inside of the ceramic back. The Cathodes form the segments of each

digit. Each digit is covered by a separate Anode that is deposited on the inside of the glass front. The Anodes are formed from a thin transparent layer of tin oxide. When a sufficient voltage is

The Vacuum Fluorescent display (VFD) consists of a vacuum tube in which there are three basic types of electrodes, the filament (cathode), the anode (segment), and the grid. The VFD is

the seven-segment configuration (that form a square eight), glow when struck by the electrons. When a positive voltage of 12 to 25 volts is applied to the grid and the anodes, the electrons

VFDs were developed in Japan in 1967. Early versions of VFDs were individual digits housed in vacuum tubes like the Nixie tube and Incandescent Filament displays. VFD Phosphors can be

formulated to emit red, yellow, and green as well as the more common blue-green color. Later versions would house all of the digits (and other graphics and indicators) in one large glass

assembly. Currently VCRs account for 30% of the VFD market and Audio/Video products account for another 30%. Many early series of calculators like the Commodore 412F, Brother 310, and the

Thin-film Electroluminescent Displays (ELDs) use a thin film of phosphor (zinc sulfide (ZnS); ZnSe; ZnSMn or other fluorescent materials) sandwiched between a dielectric layer that is

sandwiched between two glass plates. Transparent electrodes (tin-oxide) are deposited on the insides of the glass plates. When a sufficient AC voltage (>100 volts) is applied to any of these

electrodes the phosphors will be excited and will emit light. ELD phosphors can be mixed with pigments to emit many colors of light including green, blue-green, lemon-yellow, orange, red as well as white light.

This type of solid state display can endure extreme conditions with exceptional tolerance to shock, vibration, temperature, and humidity, while response times remain less than one millisecond. I

have not seen ELDs used in calculators but they are used in some laptops, office machines and in the cockpit of the Spaceshuttle. They are also used to backlight LCD panels.

A Light Emitting Diode (LED) is an special type of diode that emits light when electricity applied to it"s anode and cathode. A typical LED requires about 1 1/2 volts DC at 10 milliamps to begin

emitting light. LEDs usually produce red light but yellow, green and blue versions are also now available. The LED was first marketed by Texas Instruments around 1962. LED displays (7 or more

individual LEDs) were introduced around 1967 but were very expensive. Calculators used LEDs that were arranged to form either a seven-segment display or a dot-matrix display.

Early seven segment displays formed each segment with many LEDs, later seven-segment displays would use one LED per segment with a light pipe to spread it"s light across the segment.

Also early LED displays were made small in order to keep power consumption down. A clear plastic bubble lens was fabricated into the package to magnify the display for easier viewing.

The dot-matrix style of display would form characters shaped similarly to that of a dot-matrix printer. A dot matrix of 4x7 or 5x7 is typically used. Notice how the 4x7 matrix makes up for the

missing 5th column by slightly slanting the columns. LEDs require much more power than LCDs and are more expensive to manufacture. This is the simple reason for their demise from being used in calculators.

The Liquid Crystal Display (LCD) was first developed at RCA around 1971. LCDs are optically passive displays (they do not produce light). As a result, LCDs require all most no power to

operate. Many LCD calculators can operate from the power of a solar cell, others can operate for years from small button cell batteries. LCDs work from the ability of liquid crystals (LC) to rotate

polarized light relative to a pair of crossed polarizers laminated to the outside of the display. There are two main types of LCD displays used for calculators today: Twisted nematic (TN) and

supertwisted nematic (STN). TN displays twist polarized light to 90 degrees and have a limited viewing angle. STN displays were developed to twist polarized light between 180 to 260 degrees

A LCD consists of two plates of glass, sealed around the perimeter, with a layer of liquid crystal fluid between them. Transparent, conductive electrodes are deposited on the inner surfaces of the

glass plates. The electrodes define the segments, pixels, or special symbols of the display. Next a thin polymer layer is applied on top of the electrodes. The polymer is etched with channels in

order to align the twist orientation of the LC"s helix shaped molecules. Finally, polarizing films are laminated to the outer surfaces of the glass plates at 90 degree angles. Normally, two polarizing

films at 90 degrees should be dark, preventing any transmission of light but due to the ability of LC to rotate polarized light the display appears clear. When AC voltage is passed through the LC,

LCD stands for liquid crystal display. Liquid crystal is a kind of material that is neither liquid nor a solid, it comes in between these two states of matter. It has properties similar to that of the crystallised solid. The arrangement of molecules is in a fixed pattern however they are not fixed in shape or form.

They are usually found in smartphones, televisions, computer monitors and instrument panels and use a liquid crystal display panel to control where the light is displayed on your screen.

In LCD displays, light emitted from the backlight passes via a vertical polarisation filter after going through the liquid crystal element, this liquid crystal element twists this light wave. The vertically polarised light then turns to a horizontally polarised light. This horizontally polarised light passes via the horizontal polarisation filter allowing the passage of light. Hence the light is visible to us. The voltage we apply to the LCD is applied in such a way that the crystal mechanism of the light is removed and the light acquires a straight pattern. Due to this, the vertically polarised light will come out vertically only, however, the horizontally polarised light will be blocked and we won’t see any light in this case. This is how LCD works on the principle of blocking light.

3The fluorescent lights in an LCD TV are always placed behind the screen.The placements of the lights on an LED TV can differ which means light-emitting diodes can be placed either behind the screen or around its edges.

7LCD TVs are the most efficient type of TVs as can help you save as much as 30-70% more electricity than any other TV type.LED TVs consume very little energy so there is almost a 50% reduction in power consumption.

8LCD TVs use the cold cathode fluorescent lamps (CCFL) for backlighting. The picture quality of LCD TV is noticeable in scenes with high contrast, as the dark portions of the picture may appear too bright or washed out.LED TVs to use energy-efficient light-emitting diodes for backlighting and can provide a clearer, better picture, a thinner panel, and lesser heat dissipation than a customary LCD TV.