full form of crt tft lcd led factory

The recent surge in thin-film transistor (TFT) technology, specifically for the TFT LCD display, is making CRT (cathode ray tube) monitors a thing of the past. In fact, TFT display is being used in almost all LCD monitors these days, most notably in computers and televisions.

It owes its popularity to its ability to refresh the screen quicker than a CRT, thanks to the fact that its small transistors require such a tiny charge to engage. Aside from this, TFT displays boast other advantages that give ample reason for manufacturers and businesses to widely use it in their digital products.

Because TFT displays are handy, these can easily be transferred, moved around, and installed. It can also be mounted, freeing up space that can be used for other equipment or tasks. This makes TFT monitors a perfect choice for creating a functional workstation. With this technology, businesses can maximize the use of their workspace by keeping unwieldy monitors out of the way.

If you’re worried about ballooning energy bills, a TFT monitor can help lower them. Since it uses pixels to display images, it uses less energy than CRT monitors. In fact, you can save up to 78% in energy use when you use a TFT monitor.

Say goodbye to blur with a TFT module. It uses a flat matrix display in which all pixels remain active, thus eliminating flickers. There are also no geometric distortions to worry about, unlike a CRT screen that tends to obscure images because it electronically focuses on the image from the inside while displaying it from the rear.

Because it’s flicker-free, you can ensure a sharp visual from a TFT-module monitor, which helps avoid physical symptoms of overexposure to computers or televisions. It does not create strain on the eyes, nausea, or headaches.

Thin-film transistor (TFT) modules are ideal for graphic artists, web designers, photographers, and other media types who require two monitors simultaneously to do their work. Moreover, TFT modules enable dual monitor configurations. All your computer needs is a video card or a couple of monitor connections.

Because of these advantages, the TFT LCD display has gained prominence among many industries. Understanding how it works and how it can help promote your business will help you engage it based on your specific needs.

"Between 0.0001 and 0.00001 nits" "Sony claims an OLED contrast range of 1,000,000:1. When I asked how the contrast could be so high I was told that the surface is SO black the contrast is almost infinite. If the number representing the dark end of the contrast scale is nearly zero then dividing that number into the brightest value results in a very, very high contrast ratio."

Does not normally occur at 100% brightness level. At levels below 100% flicker often occurs with frequencies between 60 and 255 Hz, since often pulse-width modulation is used to dim OLED screens.

No native resolution. Currently, the only display technology capable of multi-syncing (displaying different resolutions and refresh rates without the need for scaling).Display lag is extremely low due to its nature, which does not have the ability to store image data before output, unlike LCDs, plasma displays and OLED displays.

In market, LCD means passive matrix LCDs which increase TN (Twisted Nematic), STN (Super Twisted Nematic), or FSTN (Film Compensated STN) LCD Displays. It is a kind of earliest and lowest cost display technology.

LCD screens are still found in the market of low cost watches, calculators, clocks, utility meters etc. because of its advantages of low cost, fast response time (speed), wide temperature range,  low power consumption, sunlight readable with transflective or reflective polarizers etc.  Most of them are monochrome LCD display and belong to passive-matrix LCDs.

TFT LCDs have capacitors and transistors. These are the two elements that play a key part in ensuring that the TFT display monitor functions by using a very small amount of energy without running out of operation.

Normally, we say TFT LCD panels or TFT screens, we mean they are TN (Twisted Nematic) Type TFT displays or TN panels, or TN screen technology. TFT is active-matrix LCDs, it is a kind of LCD technologies.

TFT has wider viewing angles, better contrast ratio than TN displays. TFT display technologies have been widely used for computer monitors, laptops, medical monitors, industrial monitors, ATM, point of sales etc.

Actually, IPS technology is a kind of TFT display with thin film transistors for individual pixels. But IPS displays have superior high contrast, wide viewing angle, color reproduction, image quality etc. IPS screens have been found in high-end applications, like Apple iPhones, iPads, Samsung mobile phones, more expensive LCD monitors etc.

Both TFT LCD displays and IPS LCD displays are active matrix displays, neither of them can produce color, there is a layer of RGB (red, green, blue) color filter in each LCD pixels to make LCD showing colors. If you use a magnifier to see your monitor, you will see RGB color. With switch on/off and different level of brightness RGB, we can get many colors.

Neither of them can’t release color themselves, they have relied on extra light source in order to display. LED backlights are usually be together with them in the display modules as the light sources. Besides, both TFT screens and IPS screens are transmissive, it will need more power or more expensive than passive matrix LCD screens to be seen under sunlight.  IPS screens transmittance is lower than TFT screens, more power is needed for IPS LCD display.

1971 – Lechner, F. J. Marlowe, E. O. Nester, and J. Tults demonstrated a 2-by-18 matrix display driven by a hybrid circuit using the dynamic scattering mode of LCDs

2020 – TFT LCD display technology dominants the display market now. Within the last 20 years, it has wiped out the market of CRT (cathode-ray tube) and Plasma. The only challenges are OLED (organic light-emitting diode)and Micro LED (Maybe, still in lab).

TFT LCD Display (Thin-Film-Transistor Liquid Crystal Display) technology has a sandwich-like structure with liquid crystal material filled between two glass plates. Two polarizer filters, color filters (RGB, red/green/blue) and two alignment layers determine exactly the amount of light is allowed to pass and which colors are created.

Each pixel in an active matrix is paired with a transistor that includes a capacitor which gives each sub-pixel the ability to retain its charge, instead of requiring an electrical charge sent each time it needed to be changed.  The TFT layer controls light flow a color filter displays the color and a top layer houses your visible screen.

Utilizing an electrical charge that causes the liquid crystal material to change their molecular structure allowing various wavelengths of backlight to “pass-through”. The active matrix of the TFT display is in constant flux and changes or refreshes rapidly depending upon the incoming signal from the control device.

The pixels of TFT displays are determined by the underlying density (resolution) of the color matrix and TFT layout. The more pixels the higher detail is available.Available screen size, power consumption, resolution, interface (how to connect) define the TFT displays.

The pixels of TFT displays are determined by the underlying density (resolution) of the color matrix and TFT layout. The more pixels the higher detail is available. Available screen size, power consumption, resolution, interface (how to connect) define the TFT displays.

The TFT screen itself can’t emit light like OLED display, it has to be used with a back-light of white bright light to generate the picture. Newer panels utilize LED backlight (light emitting diodes) to generate their light and therefore utilize less power and require less depth by design.

CRT stands for Cathode Ray Tube and LCD stands for Liquid Crystal Display area unit the kinds of display devices wherever CRT is employed as standard display devices whereas LCD is more modern technology. These area unit primarily differentiated supported the fabric they’re made from and dealing mechanism, however, each area unit alleged to perform identical perform of providing a visible variety of electronic media. Here, the crucial operational distinction is that the CRT integrates the 2 processes lightweight generation and lightweight modulation and it’s additionally managed by one set of elements. Conversely, the LCD isolates the 2 processes kind one another that’s lightweight generation and modulation.

What are the key differences between leading electronic visual displays available in the market? Such are the times that we live in that today most of us cannot possibly imagine a life without an electronic device. In fact, we have managed to surround ourselves and depend on a growing number of electronic appliances. Several of these devices - as it happens - also have an electronic visual display; be it a mobile phone, a tablet, a desktop monitor or the television set. Without a doubt, these electronic screen devices have revolutionised the way we lead our lives now as all of the four devices have become increasingly commonplace to the point of becoming basic necessities. Which brings to our blog topic: what exactly is an electronic screen and which are the leading screen technologies available today? Read on to know more…

An electronic screen or an electronic visual display, informally called a screen, is basically a device used to display / present images, text, or video transmitted electronically, without creating a permanent record. As mentioned earlier, electronic visual displays include television sets, computer monitors, and digital signage in information appliances. As per the definition, an overhead projector (along with screen onto which the text, images, or video is projected) can also be called an electronic visual display.

1. Cathode Ray Tube (CRT) display:A vacuum tube containing one or more electron guns and a phosphorescent screen, the cathode-ray tube (CRT) is used to display images. It modulates, accelerates, and deflects electron beams onto the screen to make the images. The images could be electrical waveforms (oscilloscope), pictures (television, computer monitor) or radar targets. CRTs have also been used as memory devices, wherein the visible light from the fluorescent material (if any) does not really have any significant meaning to a visual observer, but the visible pattern on the tube face could cryptically represent the stored data. In television sets and computer monitors, the front area of the tube is scanned systematically and repetitively in a pattern called a raster. Thanks to the intensity of each of the three electron beams - one for each additive primary color (red, green, and blue) - being controlled with a video signal as a reference, an image is produced. In modern CRT monitors and TVs, magnetic deflection bends the beams; magnetic deflection is essentially a varying magnetic field generated by coils and driven by electronic circuits around the neck of the tube, although electrostatic deflection is often used in oscilloscopes, a type of electronic test instrument. CRT is one of the older screen/ display technologies.

2. Flat-Panel display: Flat-panel displays are electronic viewing technologies that are used to allow people to see content (still images, moving images, text, or other visual material) in a range of entertainment, consumer electronics, personal computer, and mobile devices, and several kinds of medical, transportation and industrial equipment. They are much lighter and thinner than traditional cathode ray tube (CRT) television sets and video displays and are typically less than 10 centimetres (3.9 in) thick. Flat-panel displays can be classified under two display device categories: volatile and static. Volatile displays need pixels to be periodically electronically refreshed to retain their state (say, liquid-crystal displays). A volatile display only shows an image when it has battery or AC mains power. Static flat-panel displays rely on materials whose color states are bistable (say, e-book reader tablets from Sony), and they retain the text or images on the screen even when the power is off. In recent times, flat-panel displays have almost completely replaced old CRT displays. Most flat-panel displays from the 2010s use LCD and/or LED technologies. Majority of the LCD screens are back-lit as color filters are used to display colors. Being thin and lightweight, flat-panel displays offer better linearity and have higher resolution than the average consumer-grade TV from the earlier decades. The highest resolution for consumer-grade CRT TVs was 1080i, whereas many flat-panels can display 1080p or even 4K resolution.

3. Plasma (P) display: A plasma display panel (PDP) is a type of flat panel display that uses small cells containing plasma; ionized gas that responds to electric fields. Earlier, plasma displays were commonly used in larger televisions (30 inches and larger). But since more than a decade now, they have lost almost all market share due to competition from low-cost LCDs and more expensive but high-contrast OLED flat-panel displays. Companies stopped manufacturing plasma displays for the United States retail market in 2014, and for the Chinese market in 2016.

4. Electroluminescent display (ELD):Electroluminescent Displays (ELDs) are screens that make use of electroluminescence. Electroluminescence (EL) is an optical and electrical phenomenon where a material emits light in response to an electric current passed through it, or to a strong electric field.

So ELD then is a kind of flat panel display produced by sandwiching a layer of electroluminescent material between two layers of conductors. When the current flows, the layer of material emits radiation in the form of visible light. Basically, electroluminescence works by exciting atoms by passing an electric current through them, leading them to emit photons. By varying the material being excited, the color of the light being emitted is changed. The actual ELD is built using flat, opaque electrode strips running parallel to each other, covered by a layer of electroluminescent material, followed by another layer of electrodes, running perpendicular to the bottom layer. This top layer has to be transparent so as to allow light to escape. At each intersection, the material lights, creating a pixel.

5. Liquid Crystal Display (LCD): A liquid-crystal display (LCD) is a flat-panel display or other electronically modulated optical device that makes use of the light-modulating properties of liquid crystals. Liquid crystals do not give out light directly; they use a backlight or reflector to create images in color or monochrome. LCDs display arbitrary images like in a general-purpose computer display or fixed images with low information content, that can be displayed or hidden, such as preset words, digits, and seven-segment displays, like in a digital clock. They use the same core technology, apart from the fact that arbitrary images are made up of a large number of small pixels, while other displays have larger elements. LCDs could be on (positive) or off (negative), as per the polarizer arrangement. For instance, a character positive LCD with a backlight has black lettering on a background the same color as the backlight, and a character negative LCD has a black background with the letters matching the backlight color. Blue LCDs typically get their characteristic appearance from optical filters being added to white.

LCD screens are being used in several applications such as LCD televisions, computer monitors, instrument panels, aircraft cockpit displays, and indoor and outdoor signage. Small LCD screens are seen in portable consumer devices such as digital cameras, watches, calculators and mobile telephones, including smartphones. LCDs are also found in consumer electronics products such as DVD players, video game devices and clocks. It is interesting to note that these displays are available in a wide range of screen sizes as compared to CRT and plasma displays. Also, while LCD screens have replaced heavy, bulky cathode ray tube (CRT) displays in almost all applications, they are slowly being replaced by OLEDs, which can be easily made into different shapes, and boast other advantages such as having 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 and potentially lower power consumption. OLEDs, however, are more expensive for a given display size and they can suffer from screen burn-in when a static image is displayed on a screen for a long time (for instance, the table frame for an airline flight schedule on an indoor sign), not to mention that there is currently no way to recycle OLED displays. LCD panels, on the other hand, are susceptible to image persistence but they rarely suffer image burn-in as they do not use phosphors, plus they can be recycled, although this technology is not exactly common as yet. Not surprisingly, attempts have been made to increase the lifespan of LCDs in the form of quantum dot displays, which provide performance to that of an OLED display, but the Quantum dot sheet that gives these displays their characteristics can not yet be recycled. LCDs are also more energy-efficient and can be disposed of more safely than a CRT display.

6. Light-Emitting Diode (LED) display:An LED display is a flat panel display that uses an array of light-emitting diodes as pixels for a video display. Their brightness lets them be used outdoors where they are visible in the sun for store signs and billboards. It was in 1962 that LED diodes first came into being; this was when the first practical LED was invented by General Electric’s Nick Holonyak Jr. This was also when they were mainly red in color. While the early models had a monochromatic design, the efficient Blue LED completing the color triad became available in the market only in the late 1980s. Today, large displays use high-brightness diodes to generate a wide spectrum of colors. In fact, recently, LEDs have also become a popular choice among destination signs on public transport vehicles and variable-message signs on highways. LED displays can offer general illumination in addition to visual display, as when used for stage lighting or other decorative (as opposed to informational) purposes. Several big corporations such as Apple, Samsung and LG are currently looking to develop MicroLED displays. These displays are easily scalable, and help with making the production process more streamlined. That said, production costs continue to be quite high and thus remain a limiting factor.

7. Organic Light-Emitting Diode OLED display: An organic light-emitting diode (OLED), also called an organic EL (organic electroluminescent) diode, is a light-emitting diode (LED), where the emissive electroluminescent layer is a film of organic compound that gives out light in response to an electric current. The organic layer is located between two electrodes, at least one of which is transparent. OLEDs are used to build digital displays in devices such as television screens, computer monitors, portable systems such as smartphones, handheld game consoles and digital assistants. Typically, an OLED display works without a backlight because it emits visible light. This means that it can display deep black levels and can be thinner and lighter than a liquid crystal display (LCD). In low ambient light conditions, say in a dark room, an OLED screen can achieve a higher contrast ratio than an LCD, irrespective of whether the LCD uses an LED backlight or cold cathode fluorescent lamps.

Also important to note an OLED display can be driven with a passive-matrix (PMOLED) or active-matrix (AMOLED) control scheme. In the former, each row (and line) in the display is controlled sequentially, one by one, as opposed to in the AMOLED where a thin-film transistor backplane is used to directly control and switch each individual pixel on or off, thus offering higher resolution and larger display sizes.

Lastly, there are two main families of OLED: those based on small molecules and those making use of polymers. A big area of research is the development of white OLED devices for use in solid-state lighting applications.

8. Active-Matrix Organic Light-Emitting Diode (AMOLED) display: AMOLED (Active-Matrix Organic Light-Emitting Diode) is a display device technology being used in smartwatches, mobile devices, laptops, televisions, media players and digital cameras. As mentioned earlier, it is a type of OLED; rather a specific type of thin-film-display technology where organic compounds form the electroluminescent material. What distinguishes it from PMOLED is the active matrix technology behind the addressing of pixels. An AMOLED display basically comprises an active matrix of OLED pixels generating light (luminescence) upon electrical activation that have been positioned or integrated onto a thin-film transistor (TFT) array, which in turn operates as a series of switches to control the current flowing to each individual pixel. AMOLED technology has continued to work towards consuming low power, becoming low-cost and offering scalability (mainly by offering larger sizes.

9. Super AMOLED display: Super AMOLED is essentially an AMOLED display but it is a term coined for marketing purposes by leading device manufacturers. It is used to denote AMOLED displays that come with an integrated digitizer, i.e. the layer that detects touch is integrated into the screen, instead of overlaid on top of it. The display technology however is not an improvement on the AMOLED. For instance, Samsung claims that Super AMOLED displays reflect one-fifth as much sunlight as the first generation AMOLED. In fact, Super AMOLED displays that are part of the Pentile matrix family, are also at times known as SAMOLED. Other variations of this term include Super AMOLED Advanced, Super AMOLED Plus, HD Super AMOLED, HD Super AMOLED Plus and Full HD Super AMOLED.

10. Quantum Dot (QD) display:A quantum dot display is a display device that uses quantum dots (QD), basically semiconductor nanocrystals that can generate pure monochromatic red, green, and blue light. Photo-emissive quantum dot particles are used in a QD layer which converts the backlight to give out pure basic colors that in turn enhance display brightness and color gamut by decreasing light loss and color crosstalk in RGB color filters. This technology is used in LED-backlit LCDs, though it applies to other display technologies as well (such as white or blue/UV OLED).

Among devices employing QD screens, one can find electro-emissive or electroluminescent quantum dot displays, which are currently an experimental type of display based on quantum-dot light-emitting diodes (QD-LED). These displays are similar to active-matrix organic light-emitting diode (AMOLED) and MicroLED displays, as in light is produced directly in each pixel by applying an electric current to inorganic nano-particles. QD-LED displays are supposed to support large, flexible displays and not degrade as readily as OLEDs, making them good bets for flat-panel TV screens, digital cameras, mobile phones and handheld game consoles. As of 2018, all commercial products like LCD TVs that use quantum dots and are called QLED, use photo-emissive particles, whereas electro-emissive QD-LED TVs are only to be found in laboratories today.

TFT is a Thin Film Transistor, TFT refers to each LCD liquid crystal display pixels that are driven by integration in the behind of the Thin Film Transistor. Therefore, the TFT-type display has the advantages of high responsiveness, high brightness, and high contrast, and its display effect is close to that of CRT display, TFT-LCD is one of the most liquid crystal displays.TFT display is also a kind of active-matrix liquid crystal display equipment. TFT-LCD is one of the best LCD color displays, TFT-LCD has the advantages of fine and vivid image, lightweight, low power consumption, and good environmental protection performance, widely used in TV, laptop, mobile phone, monitor, medical beauty, and other equipment.

Unlike TN, TFT displays are “backlit” – the imaginary light path is not from top to bottom, as in TN, but from bottom to top. In this way, a special light tube is set on the back of the liquid crystal, and the light source shines upward through the lower polarizer. Since the upper and lower interlayer electrodes are changed into FET electrodes and common electrodes, the performance of liquid crystal molecules will also change when the FET electrode is switched on. The display purpose can be achieved through shading and light transmission, and the response time is greatly improved to about 80ms.TFT is commonly known as “true color” because it has higher contrast and richer colors than TN-LCD, and the screen updates faster.

The main feature of TFT-LCD, as opposed to TN, is one semiconductor switch per pixel. Because each pixel can be directly controlled by point pulses. Therefore, each node is relatively independent and can be controlled continuously. Such a design method not only improves the response speed of the display screen but also can accurately control the display grayscale, which is why TFT color is more realistic than DSTN.

The TFT panel is cut from a larger substrate. LCD products also have a large array of transistors to control the three primary colors, and current manufacturing technology is difficult to ensure that tens or even hundreds of millions of transistors on a large substrate are without a single problem. If there is a problem with one of the transistors, then the corresponding color of the corresponding point of the transistor will go wrong (only a certain fixed color can be displayed), and this point is commonly called “bad point”. The probability of bad spots is not fixed in position, so a substrate is likely to be wasted a lot. Generally, LCD requires that the bad point is less than 5, and some large manufacturers have narrowed the standard to 3, or even 0, which will reduce the yield rate. Some smaller manufacturers expand the bad points, which naturally reduces costs and quality, which is one reason why some manufacturers have been able to slash prices.

Although there are many manufacturers capable of producing LCDs, there are only a handful of manufacturers capable of producing TFT panels.ACER, as a well-known enterprise in the IT industry, is quite powerful. Although IT does not have the ability to produce TFT panels by itself,

The display sets the electron, the communication and the information processing technology in one body, is considered as the electron industry after the 20th-century microelectronics, the computer another important development opportunity.

With the rapid development of science and technology, a revolution is taking place in display technology. After more than 20 years of research, competition, and development, the flat-panel display has entered the role and become the mainstream of display products in the new century. There are four types of flat-panel displays with the most fierce competition:

The principle of field emission flat display is similar to that of CRT, which only has one to three electron guns and up to six. The field emission display adopts an electron gun array (electron emission micro tip array, such as diamond film tip cone), and the display with a resolution of VGA (640×480×3) needs 921,600 electron emission micro tips with uniform performance.

Glow plasma display are through small vacuum plasma discharge excitation discharge cavity light-emitting materials, luminous effect, and low power consumption is its shortcomings (only 1.2 lm/W, and lamp luminous efficiency more than 80 lm/W, 6 watts per square inch display area), but in 102 ~ 152 cm diagonal field of the large-screen display has a strong competitive advantage.

The semiconductor light-emitting diode (LED) display scheme, due to the successful development of GaN blue light-emitting diode, has won absolute control over the market of the video display with very large screens, but this kind of display is only suitable for large outdoor displays, and video display with a small and medium screen does not have its market.

Special TFT – LCD, LCD flat panel display, is the only one in the brightness, contrast, such as power, life, volume and weight of integrated performance to catch up with and surpass that of the CRT display device, it features good performance, large-scale production, a high degree of automation, low cost of raw materials, the vast development space, will quickly become the mainstream product of the new century, is one of the highlights of the 21st-century global economic growth.

TFT-LCD, which USES liquid crystal as the excellent characteristic of the light valve, divides the luminous display device into two parts, namely the light source and the control of the light source. As a light source, no matter from luminous efficiency, full color, or life, has achieved brilliant results, but also in continuous deepening. Since the invention of the LCD, the backlight has been continuously improved, from monochrome to color, from thick to thin, from side fluorescent lamps to flat fluorescent lamps. The latest achievements in light sources will provide a new backlight for LCD. With the progress of light source technology, there will be newer and better light sources and LCD applications. Is the control of the light source, the rest of the large scale integrated circuit technology and semiconductor technology transplanted, successfully developed the thin film transistor (TFT) production technology, implements the matrix addressing the control of the liquid crystal light valve, solved the LCD light valve and the controller, so that the advantages of liquid crystal display (LCD).

The TFT thin-film transistor (matrix) — which “actively” controls individual pixels on the screen — is the origin of the so-called active matrix TFT.So how exactly do images come about? The basic principle is simple: a display screen consists of a number of pixels that can emit light of any color, and controlling each pixel to display a corresponding color does the trick. In TFT LCD, backlight technology is generally adopted. In order to accurately control the color and brightness of each pixel, a switch similar to a shutter needs to be installed after each pixel. When the “shutter” is opened, light can come through, but when the “shutter” is closed, light cannot come through.

Of course, it’s not as simple technically as that. Liquid Crystal Display USES the properties of Liquid crystals (Liquid when heated and solid when cooled)

Liquid crystal displays (LCDs) are filamentous, and their molecular structure changes as the environment change, giving them different physical properties — allowing light to pass through or block it — in the case of louvers.

You know the three primary colors, so each pixel on the display needs to be made up of three similar basic components described above, which control the red, green, and blue colors respectively.

TFT color filter is divided into red, green, and blue according to the color, which is successively arranged on the glass substrate to form a group (dot pitch) corresponding to a pixel. Each monochrome filter is called a sub-pixel. That said, if a TFT display supports a maximum resolution of 1280×1024, it needs at least 1280×3×1024 sub-pixels and transistors. For a 15-inch TFT display (1024 x 768), a pixel is about 0.0188 inches.

As you know, pixels are critical to a display, and the smaller each pixel, the larger the maximum possible resolution of the display. But because of the physical limitations of transistors, the TFT is roughly 0.0117 inches (0.297mm) per pixel, so the maximum resolution for a 15-inch display is 1,280 by 1,024.[1]

TFT technology is the basis of liquid crystal (LC), inorganic and organic thin-film electroluminescence (EL and OEL) flat panel displays.TFT is a kind of film necessary for manufacturing circuits formed by sputtering and chemical deposition process on the non-single wafers such as glass or plastic substrate, and large-scale semiconductor integrated circuit (LSIC) is produced by processing of the film. Using non-single-crystal substrate can greatly reduce the cost, which is the extension of traditional LSI to large-area, multi-function, and low-cost direction.

The first generation of large-area glass substrate (300mm×400mm) TFT-LCD production line was put into production in the early 1990s. By the first half of 2000, the area of glass substrate has been expanded to 680mm×880mm), and the recent 950mm×1200mm glass substrate will also be put into operation. In principle, there is no area limit.

The 1.3-inch TFT chip used for liquid crystal projection has a resolution of one million pixels in XGA.The resolution of the SXGA (1280×1024) 16.1-inch TFT array amorphous silicon film thickness is only 50nm, and the TAB ON GLASS and SYSTEM ON GLASS technology, its IC integration, requirements for equipment and supply technology, technical difficulty than the traditional LSI.

TFT was first used as a matrix location circuit to improve the optical valve characteristics of liquid crystals. For high-resolution displays, the accurate control of object elements is realized through voltage adjustment in the range of 0-6v (its typical value is 0.2 to 4V), thus making it possible for LCD to achieve a high-quality high-resolution display.TFT-LCD is the first flat panel display in human history to surpass CRT in display quality. Now people are starting to integrate the drive IC into the glass substrate, and the whole TFT will be more powerful than traditional large-scale semiconductor integrated circuits.

The glass and plastic substrates fundamentally solve the cost problem of large-scale semiconductor integrated circuits and open up wide application space for large-scale semiconductor integrated circuits.

In addition to traditional film formation processes such as sputtering and CVD (chemical vapor deposition) and MCVD (molecular chemical vapor deposition), laser annealing technology has also been applied, which can produce amorphous and polycrystalline films as well as monocrystalline films. Not only can make silicon membrane but also can make other Ⅱ – Ⅵ and Ⅲ – Ⅴ semiconductor thin film.

Low voltage applications, low drive voltage, solid use safety, and reliability improvement; Flat, light, and thin, saving a lot of raw materials and space; Low power consumption, its power consumption is about one-tenth of the CRT display, reflective TFT-LCD is only about one percent of the CRT, saving a lot of energy; TFT-LCD products also have specifications, models, size series, variety, convenient and flexible use, maintenance, update, upgrade easy, long service life and many other characteristics. The display range covers the application range of all monitors from 1 inch to 40 inches and the large projection plane, which is a full-size display terminal; Display quality from the simplest monochrome character graphics to high resolution, high color fidelity, high brightness, high contrast, the high response speed of various specifications of video display; Display mode has direct vision type, projection type, perspective type, and reflection type.

No radiation, no flicker, no harm to the user’s health. In particular, the appearance of TFT-LCD electronic books and periodicals will bring mankind into the era of a paperless office and paperless printing, and trigger the revolution of human learning, communication, and recording civilization.

The temperature range from -20℃ to +50℃ can be used normally, and the low temperature working temperature of TFT-LCD after temperature reinforcement can reach -80 ℃. It can be used as a mobile terminal display, desktop terminal display, and large screen projection TV. It is a full-size video display terminal with excellent performance.

The power consumption of computer or tv displays vary significantly based on the display technology used, manufacturer and build quality, the size of the screen, what the display is showing (static versus moving images), brightness of the screen and if power saving settings are activated.

Click calculate to find the energy consumption of a 22 inch LED-backlit LCD display using 30 Watts for 5 hours a day @ $0.10 per kWh. Check the table below and modify the calculator fields if needed to fit your display.

Price (kWh): Enter the cost you are paying on average per kilowatt hour, our caculators use the default value of 0.10 or 10 cents. To find an exact price check your electricity bill or take a look at Global Electricity Prices.

LED & LCD screens use the same TFT LCD (thin film transistor liquid crystal display) technology for displaying images on the screen, when a product mentions LED it is referring to the backlighting. Older LCD monitors used CCFL (cold cathode fluorescent) backlighting which is generally 20-30% less power efficient compared to LED-backlit LCD displays.

The issue in accurately calculating the energy consumption of your tv or computer display comes down to the build quality of the screen, energy saving features which are enabled and your usage patterns. The only method to accurately calculate the energy usage of a specific model is to use a special device known as an electricity usage monitor or a power meter. This device plugs into a power socket and then your device is plugged into it, electricity use can then be accurately monitored. If you are serious about precisely calculating your energy use, this product is inexpensive and will help you determine your exact electricity costs per each device.

In general we recommend LED displays because they offer the best power savings and are becoming more cheaper. Choose a display size which you are comfortable with and make sure to properly calibrate your display to reduce power use. Enable energy saving features, lower brightness and make sure the monitor goes into sleep mode after 5 or 10 minutes of inactivity. Some research studies also suggest that setting your system themes to a darker color may help reduce energy cost, as less energy is used to light the screen. Also keep in mind that most display will draw 0.1 to 3 watts of power even if they are turned off or in sleep mode, unplugging the screen if you are away for extended periods of time may also help.

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Display screen is everywhere nowadays. Do you still remember the TVs or computer monitors 20 years ago? They were quadrate, huge and heavy. Now let’s look at the flat, thin and light screen in front of you, have you ever wondered why is there such a big difference?

Actually, the monitors 20 year ago were CRT (Cathode Ray Tube) displays, which requires a large space to run the inner component. And now the screen here in your presence is the LCD (Liquid Crystal Display) screen.

As mentioned above, LCD is the abbreviation of Liquid Crystal Display. It’s a new display technology making use of the optical-electrical characteristic of liquid crystal.

Liquid crystal is a state of substance that has both the characteristics of liquid and solid crystal. It don’t emit light itself, but it can let the light pass perfectly in specific direction. Meanwhile, liquid crystal molecule will rotate under the influence of a electric field, and then the light goes through it will rotate too. That said, liquid crystal can be a switch of light, which is the key in display technology.

STN LCD: STN is for Super-twisted Nematic. The liquid crystal in STN LCD rotate more angles than that in TN LCD, and have a different electrical feature, allowing STN LCD to display more information. There are many improved version of STN LCD like DSTN LCD (double layer) and CSTN LCD (color). This LCD is used in many early phones, computers and outdoor devices.

TFT LCD: TFT is for Thin Film Transistor. It’s the latest generation of LCD technology and has been applied in all the displaying scenario including electronic devices, motor cars, industrial machines, etc. When you see the word ‘transistor’, you may realize there’s integrated circuits in TFT LCD. That’s correct and the secret that TFT LCD has the advantage of high resolution and full color display.

In a simple way, we can divide TFT LCD into three parts, from bottom to top they are: light system, circuit system and light and color control system.In manufacturing process, we’ll start from inner light and color control system and then stretch out to whole module.

It’s accustomed to divide TFT LCD manufacturing process into three main part: array, cell and module. The former two steps are about the production of light and color control system, which contains TFT, CF (color filter) and LC (liquid crystal), named a cell. And the last step is the assembly of cell, circuit and light system.

In order to enhance productivity, in this step we’ll do a series of procedure on a large glass, which will be cut into smaller pieces in the following step.

First, let me introduce a crucial material, ITO, to you. ITO, abbreviation of Indium tin oxide, has the characteristic of electrical conductivity and optical transparency, as well as can be easily deposited as a thin film. Thus it’s widely used to create circuit on glass.

Now let’s turn to the production of TFT and CF. Here is a common method called PR (photoresist) method. The whole process of PR method will be demonstrated in TFT production.

◇   Use glue to build a boundary for LC on both glass. And on CF glass, apply one more layer of conductive adhesive. This enable LC molecule link to the control circuit.

Currently and unfortunately, there is no such thing as Cloud Police. If there were, two-thirds or more of the companies using ‘cloud’ in their advertising and documentation would be in Cloud Jail for seriously misusing the word in their marketing.

The term ‘Cloud’ is over-used and misused—sometimes intentionally and knowingly, but also often in ignorance. It’s just a word—but in the context of cloud computing technology, it does have a specific meaning in the United States. We may lack cloud police, but we do have a resource that defines cloud.

The National Institute of Standards and Technology (NIST) spells out the requirements in The NIST Definition of Cloud Computing. Regardless of where in the world your video system is located, there are certain, fundamental attributes of a ‘Cloud Video Surveillance System.’

A modern security video surveillance system is composed of securely connected video cameras (IP cameras and/or analogue cameras with encoders), video recorders, video display monitors, and video management software for managing equipment configuration and system performance configurations and for providing system operations functionality. Based on the NIST definition of cloud computing and its essential characteristics, a true cloud system would have significant advantages over a traditional on-premises server-based system.

Cloud Video System can be Operated and Managed from Anywhere. System management capabilities are off-site from camera locations for all system functionality. It should not be necessary to be on-site to view or export video or change system or device

Redundant System Functionality. The software system functionality is redundant, so in the event of a computing or networking failure, alternate computing and/or networking resources immediately take over without human interaction.

Intelligent Video Data Transmission and Video Data The installer and users should be able to configure and adjust video traffic bandwidth usage--such as the percentage of available bandwidth. On-premises appliances should intelligently buffer video being sent to the cloud to accommodate fluctuations in internet bandwidth availability.

Internet-Based Integrations. Integrations with system functionality must be available through a single secure and well-engineered applications programming interface (API) available via a secure internet connection to the cloud-based system software.

System Performance Metrics. Maintain and chart a seven-day performance window of Camera LAN and internet packet loss, Camera LAN and Cloud Bandwidth Usage, per-camera video storage in hourly increments.

Automatic Cloud System Upgrades. Feature and system security upgrades to cloud system software and cloud user applications, including periodic software and firmware updates on-premises appliances, should be automatically provided as they are released.

On-Demand Periodic Full Hardware Replacement. To keep subscribed on-premises system physical hardware technologically current, provide on-demand complete hardware replacement at no charge every six years.

Cloud mis-marketing commonly occurs when vendors use public cloud data centre capabilities—such as AWS, Google or Azure--to provide parts of their customer solution, without actually providing the customer with the full benefits of cloud computing. In these cases, vendors are wrongfully labeling the products or services ‘cloud’ offerings.

Client-Server Based Applications Running in a Virtual Server. When a client-server application is installed in a virtual server in a public cloud—the same way it is done within an on-premises virtual server data centre—this is not a cloud application and does not provide the end-user with the benefits of cloud computing.

Browser-Based Client-Server Applications. Software running in a ‘cloud’ data centre can provide a browser-based interface without conforming to the essential cloud computing characteristics. The browser is not the determining factor in a cloud system.

Server Database Partitioning. The partitioning of a single client-server application database into separate customer partitions is not a cloud ‘multi-tenant’ model, because a shared database does not provide ‘different physical and virtual resources dynamically assigned and reassigned according to consumer demand,’ this is not a cloud-system architecture.

Client-Server Camera Licences ‘Priced’ as a Subscription. Software companies that re-price their client-server software licenses into monthly billings and call them cloud subscriptions are not providing a cloud subscriber application

Remotely Executed Upgrades. Remotely executed periodic upgrades of on-premises system software, performed as part of a service or support fee, are not a cloud computing service—regardless of whether the software upgrade image is stored in a cloud location.

Assumed Cybersecurity. Service providers will on occasion mistake the cybersecurity credentials and certifications of their public cloud partner with the cybersecurity of the software service provider’s own application. See sidebar ‘Assessing A Vendor’s Cybersecurity Credentials.’

So how do we sum up true cloud? Based on the nature of its software functionality, true cloud provides maximum value for the subscriber because it’s engineered to take advantage of the characteristics of cloud computing to be cost-effective, flexible, and high performing for all use cases.

Any vendor providing cloud-based applications should be able to explain in detail how they have applied the cloud computing characteristics--on-demand self-service, broad network access, resource pooling, rapid elasticity or expansion, and measured service--for the benefit of the subscriber.

Assessing a Vendor’s Cybersecurity Credentials - When end-users and resellers assess the cybersecurity credentials of vendors, it’s essential to check the documentation, read the fine print, and ask the right questions. Fortunately, there are some easy best practices to follow.

It’s good news if your vendor has completed audits such as SOC 2 Type 2 and ISO 27001. Considered the gold standard of security audits, SOC 2 Type 2 and ISO 27001 are rigorous assessments that take six months or more to complete, and they provide independent validation that vendor’s policies and procedures meet and exceed cybersecurity standards.

Always take a close look at audits and credentials to determine if your vendor holds the cybersecurity credential themselves, or if the credential is held by one of their vendors. For example, some vendors who host software in the cloud—whether cloud applications or virtualised client-server applications—make the mistake of pointing to a SOC 2 Type 2 or ISO 27001 certification held by AWS or Azure or another public cloud whose services the vendor uses to run their software.

However, such reports and certifications apply only to the cloud infrastructure on which the vendor’s software is running. The reports do not apply to the vendor’s software and the vendor’s own cybersecurity and data privacy practices, the vendor’s development environment, its technical support personnel or any internal vendor network that connects to its cloud system.

A great example is the Security, Trust, Assurance, and Risk (STAR) Registry provided by the Cloud Security Alliance (CSA), that documents the security and privacy controls of popular cloud computing offerings. Vendors can submit a free questionnaire to show their security and compliance postures, including the regulations, standards, and frameworks they adhere to.

Any cloud application service provider stating they have engineered sound cybersecurity for their cloud offering should back up that assertion by participating in the STAR registry program.—Ken Francis.

RM2CPKXWB–Casio Computer Co. President Kazuo Kashio shows off the company"s new pocket personal computer CASSIOPEIA E-707, a next-generation mobile network terminal that incorporates data communications functions in a Pocket PC, at an unveiling at a Tokyo hotel December 12, 2000. The low-power consumption, high-resolution Hyper Amorphous Silicon TFT (HAST) color LCD displays 65,536 colors for precise reproduction of text and images, and is to go on sale in January 2001. The price has not yet been set, but will be around 100,000 yen (around $900), the company said. ES/PB