stn vs tft display in stock

1.TN-type liquid crystal display due to low technical level, low price, application range of small-size products under 3 inches and can only show black and white monochrome and do some simple text, digital display, mainly used in electronic watches, calculators, simple handheld game consoles and other consumer electronics.

2.STN-type liquid crystal display is simpler than TFT-type process, high yield, relatively cheap, for the contrast between strong and screen conversion reaction time faster commodities, so more applied to information processing equipment. If you add a color filter in front of the LCD panel, you can display a variety of colors, even up to the degree of full color. These products are mostly used in the display of text, digital and graphics functions, such as low-grade laptops, handheld computers, stock machines and personal digital assistants (PDAs) and other portable products.

3. TFT LCD display because the display reaction speed is faster, suitable for animation and video display, so it is widely used in digital cameras, LCD projectors, laptops, desktop LCD monitors. Because it is better than STN-type products in terms of color quality and reaction speed, it is also the mainstream product on the market.

The LCD follows a series of rules that are different from CRT displays. THE LCD overcomes the shortcomings of CRT"s large size, power consumption and flickering, but also brings problems such as high cost, low viewing angle and unsatisfactory color display. CrT displays can be selected in a range of resolutions and can be adjusted to screen requirements, but LCD screens contain only a fixed number of LCD units and can only be displayed at one resolution (one pixel per unit) on the full screen. The CRT usually has three electronic guns, and the electron stream that is fired must be precisely aggregated or it will not be clearly displayed. However, there is no focus problem with the LCD because each LCD unit is switched on and off separately. That"s why the same picture is so clear on the LCD screen. LCD also does not have to worry about refresh frequency and flickering, the LCD unit is either on or off, so the image displayed at a low refresh frequency of 40-60Hz will not flash more than the image displayed at 75Hz. On the other hand, lcd units of LCD screens are prone to defects. For the 1024x768 screen, each pixel consists of three units, responsible for the red, green, and blue display of one unit so a total of about 2.4 million units (1024x768x3 x 2359296). It is difficult to guarantee that all these units are intact. Most likely, some of them have been shorted (with "bright spots") or broken (with "black spots"). Lcd displays contain things that are not used in CRT technology. The light source for the screen is the fluorescent tube that wraps behind it. Sometimes we find unusually bright lines in one part of the screen. There may also be some indecent stripes, a special light color

TFT == Thin Film Transistor - is a technology for building LCD screens. TFTs are brighter and more readable than LCDs , but cost more and consume more power. TFT is also known as AMLCD, or Active Matrix Liquid Crystal Display.

STN == Super Twist Nematic - a long long time ago, researchers discovered that the more twisted the molecules were in a liquid crystal display, the better the contrast produced.

IPS (In-Plane Switching) lcd is still a type of TFT LCD, IPS TFT is also called SFT LCD (supper fine tft ),different to regular tft in TN (Twisted Nematic) mode, theIPS LCD liquid crystal elements inside the tft lcd cell, they are arrayed in plane inside the lcd cell when power off, so the light can not transmit it via theIPS lcdwhen power off, When power on, the liquid crystal elements inside the IPS tft would switch in a small angle, then the light would go through the IPS lcd display, then the display on since light go through the IPS display, the switching angle is related to the input power, the switch angle is related to the input power value of IPS LCD, the more switch angle, the more light would transmit the IPS LCD, we call it negative display mode.

The regular tft lcd, it is a-si TN (Twisted Nematic) tft lcd, its liquid crystal elements are arrayed in vertical type, the light could transmit the regularTFT LCDwhen power off. When power on, the liquid crystal twist in some angle, then it block the light transmit the tft lcd, then make the display elements display on by this way, the liquid crystal twist angle is also related to the input power, the more twist angle, the more light would be blocked by the tft lcd, it is tft lcd working mode.

A TFT lcd display is vivid and colorful than a common monochrome lcd display. TFT refreshes more quickly response than a monochrome LCD display and shows motion more smoothly. TFT displays use more electricity in driving than monochrome LCD screens, so they not only cost more in the first place, but they are also more expensive to drive tft lcd screen.The two most common types of TFT LCDs are IPS and TN displays.

This article is introduce what is TN lcd and STN display, what is difference for FSTN and FFstn lcd? what types of lcd panel available for lcd technology? how the lcd panel display working. what is difference between FSTN and FFSTN lcd display definition? what does STN stand for? let"s see the introduction as following:

LCD is including monochrome lcd and color lcd types,monochrome lcd have TN LCD, STN LCD (yellow-green mode, blue mode, gray mode, black-white mode/FSTN,FFSTN), monochrome tft lcd. color lcd including color STN LCD and color TFT lcd types, color STN LCD (CSTN lcd) is almost phase out because it is no better than TFT in contrast, Now all CSTN LCDs were replaced by tft lcd dsiplay.

TN lcd means (twisted nematic) LCD, the namatic liquid crystal elements inside the lcd glass cell,its twisted angle is 90 degree, integrated the front and rear polarizes on the lcd, the polarized angle is also in 90 degree in cross, it control the light transmission and make the tn lcd display on and off.

STN lcd is super-twisted nematic lcd display, it is a type ofmonochrome lcd display,it is also passiveliquid crystal display(LCD). compare to TN lcd, STN LCD twist angle is 240 degree, instead of 90 degree of TN LCD, so we call it STN LCD. STN lcd have yellow-green display mode, gray,black-white mode,blue display mode,available.

The STN LCD is not only difference on twist angle in 240°, in the same time, because the liquid crystal has the double-reflective characteristic, the ambient light through the polarizer, it would change to linear polarized light, the linear polarized light go through the STN LCD cell with 240° twist angle, it would turn to oval polarized light because of the double-reflective of liquid crystal characteristic （the linear polarized light turn to two group lights via240° twist angle liquid crystal, and the two group light intervened to oval polarized light）. the oval polarized lights are always with colors, that that is the reason ofyellow-green or blue color come from for the STN LCD.

With the twist angle in 240°, it bring higherdisplay contrast as the twist angle from TN 90° to STN 240°, as see the graph as below, as the increasing about the lcd contrast in twist angle, when TN lcd can support 8 commons driver (1/8 duty), such as segment lcd, because the TN liquid crystal sharpness is less than STN LCD, if the commons higher than 8, the TN lcd contrast would be decreased dramatically. while STN lcd could support 240 commons (1/240 duty) in maximum. STN not only support 16x2, 20x4 characters lcd, and could support 128x64, 320x240 graphic lcd as well, it is all because the contrast increased due to liquid crystal"s twist angle for STN lcd.

Meanwhile, as the display contrast increased for the STN LCD, it bring wider viewing angle for STN lcd than TN lcd display. STN lcd viewing angle could be reach 120 degree, while TN lcd viewing angle around 90 degree.

FSTN lcd display mode is the profession name for black-white STN mode, it is white background and black display characters. it is the nearest color to paper in monochrome lcd, even its real background is a little near to gray. FSTN LCD mode is one of STN mode, it is mean film STN, instead of the background color to yellow-green color or blue color, FSTN LCD add a optics compensating film on the front of FSTN LCD, the optics compensating film compensate the linear polarize light and color from STN LCD, the STN LCD color turn to white background after light through the optics compensator film. that is the compensating film turn the oval polarized light to the linear polarized light again,then we could get thewhite and black lcd display. it is the display mode that near to paper.FSTN lcd is widely used in many display application because of its background.

FFSTN is FSTN LCD in negative display mode, it is also a kind of white-black stn lcd mode, FFSTN lcd is negative background with white display characters, while FSTN lcd is white background with black characters, its background would be in black, and display white characters. FSTN lcd would need one layer polarized light compensation, FFSTN would need two layers polarized light compensation on the front and rear polarizers, it would need higher cost than other STN LCD, but FFSTN LCD is best lcd soluton in STN LCD. it is higher contrast than other types of lcd.

CSTN lcd means color STN LCD, its display technology is based on FFSTN mode, but it have a RGB color filter in side the lcd glass, so it can realize to color display, and because FFSTN have high contrast, so instead lcd font display to other STN LCD, CSTN LCD is better in image display than other monochrome lcd. but CSTN lcd is still type of stn lcd, it have cross-talk effect, which decreased the contrast than TFT LCD which is active display mode without cross-talk.

Because STN lcd display is 240 degree twist angle, it have better display contrast than TN display in 90 degree twist angle. the STN display could support the 1/240 duty lcd, that with 480 segment x240 common graphic lcd. and the TN lcd only support 1/8 duty with 8 commons maximum. so TN lcd is mainly used in segment lcd display or icon lcd display. STN display is mainly used in graphic lcd display. of course, if STN lcd is also can be used segment lcd display or icon lcd display, but its cost would be around double than TN lcd display.

STN LCD display require less power and are less expensive to manufacture than,STN displays typically has lower image quality and slowerresponse timecompare than TFT displays. and tft lcd display is mainly in color display, but STN LCDs have the advantage that it can be made purely reflective for viewing under direct sunlight. STN LCD is a good choice for sunlight readable display in outdoor, for it has a display effect in outdoor and less power consumption. such as transflective STN lcd or reflective STN LCD, it can be display good without backlight light on.

TFT (thin film transistor)is still one kinds of lcd, but it active matrix lcd which without cross-talk with higher contrast than STN LCD or monochrome TN LCD. because of the thin film transistor inside, it is without cross-talk problem, and easily to get the high contrast. besides IPS tft, most of tft lcd is still TN LCD display mode, that is 90 degree twist angle to the liquid crystal.

The short name of TFT:Thin Film Transistor in Chinese. What is the difference between TFT and LCD? Our laptops and desktops now use relatively advanced TFT displays, which consist of LCD pixels and are powered by thin-film transistors integrated behind the pixels. Therefore, the TFT type display screen also belongs to a class of display devices with a source matrix.

TFT type display screen is currently a better LCD color display, TFT type display has many advantages: high responsiveness, high brightness, high contrast, and so on.TFT displays are closest to CRT displays. The TFT screen also often appears on the screen of each big mobile phone, there are 65536 colors, 160,000 colors, 16 million colors three, its display effect is also very good.

TFT means that every LCD pixel on an LCD is driven by a thin-film transistor integrated behind it. Thus can achieve high speed, high brightness, high contrast display screen information, TFT-LCD(thin-film transistor liquid crystal display) is one of the majority of LIQUID crystal displays.

Liquid Crystal Display (LCD). The structure of the LCD is placed in the middle of the two pieces of parallel glass liquid crystal box, the substrate glass set on TFT (thin-film transistor), set the color filter substrate glass on, on the TFT signal, and the voltage change to control the rotation direction of the liquid crystal molecules, so as to achieve control of each pixel display emergent polarized light or not and to achieve. Now THAT LCD has replaced CRT as the mainstream, the price has dropped a lot and become widely available.

The TFT(Thin Film Field-effect Transistor) is a video in which every single pixel in the liquid crystal display is actuated by a Thin Film Transistor embedded in the rear. Thus can achieve high speed, high brightness, high contrast display screen information.

Color screens of mobile phones vary depending on LCD quality and research and development technology. The types of color screens include STN (CSTN), TFT(LTPS), TFD, UFB, and OLED.

Liquid Crystal Display (LCD). Generally divided into monochrome and color LCD two kinds, the current monochrome LCD has almost out of the notebook computer market, and color LCD still continues to develop. The color LCD can be divided into two types: STN and TFT. The TFT(Thin Film Transistorized)LCD, also known as the active transistorized Transistor LIQUID crystal display (LCD), is the true-color LIQUID crystal display that many people describe as the Thin Film Transistor.DSTN (Dual Scan Twisted Nematic)LCD, namely double scan LIQUID crystal display. It is a display mode of STN LCD, which is no longer on the market.

What is the difference between TFT and LCD? Read here I believe you have a general understanding and cognition of TFT and LCD, LCD refers to liquid crystal display, TFT is a kind of LCD. The former is for laptops and the latter is for desktop computers. There are several different technologies for LCD, FED, PDP, OLED, TFT-LCD, they are all LCD. Only the desktop with several fronts more, lower cost, TFT technology cost is higher, generally used for notebook, or MOTO, etc., now most of the display is TFT type display, I believe we will pay more attention to the choice and purchase of digital goods.

From their discovery in 1888 to their first application within displays in the 1960s, liquid crystals have become a mainstream material choice with many impactful applications in the world of electronics.

As the key component behind liquid crystal displays (LCD), these materials change light polarization to create vibrant, high-resolution images on digital screens. The growth of LCD technology has helped propel the larger display panel market enormously, with industry valuation projected to reach $178.20 billion by 2026.

A prolific variety of LCD types has been developed to best meet their exact use-cases and end-environments. Displays may be optimized for power consumption, contrast ratio, color reproduction, optimal viewing angle, temperature range, cost, and more.

Passive Matrix LCDs offer a cost advantage (both parts and tooling) and are highly customizable. The counterpart to Passive Matrix displays are Active Matrix displays.

Furthermore, the processes used for manufacturing Active-Matrix LCDs can create much finer details on the electrode structure. This allows splitting each pixel in three sub-pixels with different color. This together with the better voltage control allows full color displays.

The transistor switches used in Active Matrix Displays must not protrude significantly above the surface of the display substrates lest they might interfere with a uniform liquid crystal layer thickness. They must be implemented in thin films of suitable materials. Hence, the name Thin Film Transistors (TFT). While AM and TFT have a different meaning, they are often used interchangeably to indicate a higher performance display.

TFTs can be formed by amorphous silicon (denoted α-Si TFT), by poly-crystalline silicon (LTPS for Low Temperature Poly Silicon), or by semiconducting metal oxides (Ox-TFT or IGZO-TFT for Indium Gallium Zinc Oxide).

Currently the most common Electronics Display Technology on the market is LCD technology and among LCD technologies, TFT display technology is the most widely used across consumer applications (laptops, tablets, TVs, Mobile phones, etc.) as well as many industrial, automotive, and medical applications.

As the first commercially successful LCD technology, Passive Matrix Twisted Nematic (TN) LCDs use a 90° twist of the nematic LC fluid between two polarizers to display information. The twist of the LC fluid either blocks light from passing through the LCD cell or allows light to pass, depending on the applied voltage. The applied voltage changes the twisted nematic orientation into an orientation that does not change the polarization of tight. This is called the TN effect.

TN displays can be normally white (NW) when they use two orthogonal liner polarizers or normally black (NB) when parallel linear polarizers are used. ‘Normally’ refers to what happens when no voltage is applied.

Initially, Passive TN LCDs were used in segmented, icon, or character displays where an image element was turned “on” and “off” depending on how the fluid was driven. Improvements were made along the way to address the limited viewing angle of TN technology, which can suffer from contrast loss or even inversion at shallow angles.

It can be advantageous to twist the director of the nematic phase a bit more than 90 degrees, but less than 180 degrees. Displays like this are a subset of TN displays and are sometimes caller Hyper Twisted Nematic Displays.

The numbers of rows or icons that can be addressed in a TN display without Active Matrix addressing is very limited. This is related to how strongly the liquid crystal responds to the applied voltage. Twisting the LC nematic fluid more than 180 degrees (typically between 210 and 270 degrees) causes the display to require a much smaller voltage difference between on and off pixels. This in turn allows addressing of many more rows without an active matrix. Displays with a twist between 210 and 270 degrees are called Super Twisted Nematic displays.

The higher display resolution of STN displays comes at a price. The optical effect is no longer neutrally black and white as in a TN display. Rather these displays are naturally yellow and black or blue and white. The color can be somewhat compensated with colored polarizers, but that comes at the expense of brightness and contrast.

The color in STN displays is caused by birefringence. Adding the same birefringence in the opposite direction can compensate for the effect. Initially this was done by stacking two STN displays on top of each other. This is referred to as Double STN or DSTN, but this is of course thicker and more expensive.

The birefringence of an STN display can be approximated with a stretched transparent plastic film. Adding such a film to an STN display instead of the 2nd STN display is a lot more attractive and has almost the same performance. This is referred to as a Film Compensated STN display (FSTN, or sometimes if two films are used as FFSTN).

FSTN displays are used commonly in consumer, medical and industrial display applications that require low cost and do not need high resolution images or full color.

Another development to the TN display was to use the same concept as in FSTN displays on TN displays. However, the film cannot just be a stretched polymer. Instead, a twisted liquid crystal structure is made and polymerized into a film that is used as a compensation film for TN displays. As this method mostly improves the display characteristics at shallow viewing angles while preserving the excellent performance in straight on viewing, this technology is called Wide View Twisted Nematic (WVTN).

The above display technologies have liquid crystal molecules that are aligned nearly parallel to the display surface with more or less twisting when going from one substrate to the other. In VA (also called VAN) displays, the liquid crystal molecules are aligned vertically with respect to the display surface. Applying a voltage causes the molecules to lay flat, with or without twist.

The advantage of this arrangement is a very dark black state with very little light leakage. This allows making displays with a black mask and colored icons or symbols. These displays look like color displays with brilliant colors, however each image element or icon can only have its assigned color or black.

Due to the ability in AM displays to address one row while the other rows are isolated, the demands on the electro-optical performance of the Liquid Crystal Configuration are less stringent. In principle, all the above mentioned configurations can be used in AM displays. In practice, TN, and WVTN are frequently used as well as some versions of VA technology described below. (MVA, AIFF-MVA, PVA, ASV).

The advantage of these technologies is a much wider and more symmetrical viewing angle along with the elimination of the contrast inversion (or color shift) seen in TN TFT LCDs when viewed from various angles. IPS and FFS displays also are less sensitive to pressure, which is a big advantage in touchscreen displays.

Here, each color sub-pixel is further divided into zones (called domains) having a different direction of the molecular movement when voltage is applied. Again, the purpose is a much wider and more symmetric viewing performance and the elimination of color shifts and contrast inversion at shallow angles. MVA technology achieves that with carefully designed protrusions on the inside surfaces of the display, while PVA uses fine patterning of the electrodes on both substrates.

The integrated circuit is a patterned piece of silicon or other type of semiconducting material. A modern IC contains millions or even billions of tiny transistors. Their tiny size allows for the fabrication of smaller, faster, more efficient, and less expensive electronic circuits. The driver chips addressing electronics displays are ICs.

Often PCBAs are connected to the display with flexible printed circuits. It’s also possible to mount all necessary components on FPCs without the need of a PCBA in the display module.

Low Voltage Differential Signaling (LVDS) is an interface to the display, not a display technology itself. This technology is not specific to displays, as it’s used in many other applications as well. It’s a high-speed signal that provides some noise immunity for the display. It also allows for longer distances compared to parallel interfaces.

As display resolutions increase, data transmission rates must increase as well. At high frequencies, single-ended signaling circuits can begin to act as antennas to radiate and receive radiated noise. Low Voltage Differential Signaling (LVDS) addresses many of these shortcomings by using differential signaling at low voltages to transmit display data at high speeds.

Mobile Industry Processor Interface (MIPI®) is a high-speed Display Serial Interface (DSI) between the host processor and the display module. It has a low pin count, high bandwidth, and low Electro Magnetic Interference (EMI), and is commonly used in cameras, cell phones and tablets.

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NVD’s state-of-the-art factories are equipped to build solutions using a wide range of display and touch technologies. To view our extensive portfolio, visit our Products Page.

With industry-leading certifications and expert engineers on staff, NVD can handle your design needs, even for the most rigorous and complex end environments. To learn more about what makes us the display manufacturer for your needs, contact us today.

STN technology is a passive-matrix technology, meaning that each pixel must be "refreshed" individually many times each second. To accomplish this, the liquid crystal must react slowly enough to maintain state between refreshes. This keeps response times relatively low, and limits brightness and contrast.

– Liquid crystal material: Both use nematic LC materials but FSTN fluid has more cholesteric doping materials in it in order to help its molecular to twist higher degree.

– Viewing Angle: FSTN LCD has much better wide viewing angle than TN LCD especially at higher multiplexing application. TN LCD has a weak viewing direction, that is the reason we have to define 6 or 12 o’clock viewing angle. But FSTN LCD can be viewed clearly from all the viewing directions.

– Response time:  Between FSTN LCD has higher twist angle, it takes more time to make a change. It has longer response time or slower response speed than TN LCD.

– Operation Temperature Range:  Because of extremely slow response and background color change for FSTN LCDs at low temperature, FSTN LCDs can only be used within -20oC to +70oC, but TN LCDs can be used with -40oC to +90oC which can be easily used for outdoor applications. FSTN LCD response speed in extremely cold environment can be improved by adding a heater. FSTN LCD color change at low and high temperature can be solved by adding a reversed optical compensation cell as DSTN (Double STN), but the cost will be more than double.

– Power Consumption: Theoretically, FSTN and TN LCDs should consume the same level of power. But FSTN LCDs are normally used for high multiplex application, they use higher frequency drive and their LCD controllers and drivers normally consume more power than TN LCDs. While in general opinions, TN uses much less power than STN or FSTN LCD displays.

– Assembly (Display Module):  Because most of TN displays have fewer contacts, it can use pins, zebra, FPC (Flex Printed Circuit) to make the connections. When assembled in the LCD modules, normally COB (Chip on Board) is used. While FSTN displays have more contacts, high density and more reliable assembly ways have to be used. COG (Chip on Glass) excels because of its low cost and compatible for high volume production.

– Sunlight Readable: It is a big advantage for both TN and FSTN LCD. By applying a reflective or transflective polarizer at the back of the LCD, the high contrast display can be achieved under sunlight.

If you want to buy a new monitor, you might wonder what kind of display technologies I should choose. In today’s market, there are two main types of computer monitors: TFT LCD monitors & IPS monitors.

The word TFT means Thin Film Transistor. It is the technology that is used in LCD displays.  We have additional resources if you would like to learn more about what is a TFT Display. This type of LCDs is also categorically referred to as an active-matrix LCD.

These LCDs can hold back some pixels while using other pixels so the LCD screen will be using a very minimum amount of energy to function (to modify the liquid crystal molecules between two electrodes). TFT LCDs have capacitors and transistors. These two elements play a key part in ensuring that the TFT display monitor functions by using a very small amount of energy while still generating vibrant, consistent images.

Industry nomenclature: TFT LCD panels or TFT screens can also be referred to as TN (Twisted Nematic) Type TFT displays or TN panels, or TN screen technology.

IPS (in-plane-switching) technology is like an improvement on the traditional TFT LCD display module in the sense that it has the same basic structure, but has more enhanced features and more widespread usability.

Both TFT display and IPS display are active-matrix displays, neither can’t emit light on their own like OLED displays and have 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 hence utilizing less power and requiring less depth by design. Neither TFT display nor IPS display can produce color, there is a layer of RGB (red, green, blue) color filter in each LCD pixels to produce the color consumers see. If you use a magnifier to inspect your monitor, you will see RGB color in each pixel. With an on/off switch and different level of brightness RGB, we can get many colors.

Winner. IPS TFT screens have around 0.3 milliseconds response time while TN TFT screens responds around 10 milliseconds which makes the latter unsuitable for gaming

Winner. the images that IPS displays create are much more pristine and original than that of the TFT screen. IPS displays do this by making the pixels function in a parallel way. Because of such placing, the pixels can reflect light in a better way, and because of that, you get a better image within the display.

As the display screen made with IPS technology is mostly wide-set, it ensures that the aspect ratio of the screen would be wider. This ensures better visibility and a more realistic viewing experience with a stable effect.

Winner. While the TFT LCD has around 15% more power consumption vs IPS LCD, IPS has a lower transmittance which forces IPS displays to consume more power via backlights. TFT LCD helps battery life.

Normally, high-end products, such as Apple Mac computer monitors and Samsung mobile phones, generally use IPS panels. Some high-end TV and mobile phones even use AMOLED (Active Matrix Organic Light Emitting Diodes) displays. This cutting edge technology provides even better color reproduction, clear image quality, better color gamut, less power consumption when compared to LCD technology.

This kind of touch technology was first introduced by Steve Jobs in the first-generation iPhone. Of course, a TFT LCD display can always meet the basic needs at the most efficient price. An IPS display can make your monitor standing out.

First, what is the LCD junior physics to learn the material has three states: solid, liquid and gaseous. The following LCD screen manufacturers tell about the difference between STN LCD and TFT LCD. In fact, the so-called three-state is only a general distinction, some of the solid matter can be subdivided into different states of the state. Similarly, the liquid can also have a different "state", where the molecular arrangement of the direction of the liquid we call it "liquid crystal", referred to as "liquid crystal". Ordinary solid crystals have directionality, so many of their physical properties also have directionality. Liquid crystals have a general crystal in the direction of the same time with the liquid flow. If you want to change the direction of the solid crystal must rotate the entire crystal, and the liquid crystal is different, and its direction can be controlled by the electric field or magnetic field. Both STN and TFT use a so-called "nematic" liquid crystal (Nematic), it is filamentous, the use of electric field to control the "filament" liquid crystal direction is the application of commonly used method. Liquid crystals are usually made of liquid crystal in two pieces of glass. The surface of the glass is coated with a layer of substances called the agent, by its type and treatment methods can be controlled in the absence of external electric field when the liquid crystal arrangement. Second, STN LCD principle The world"s first liquid crystal display appeared in the early seventies, known as the TN-type liquid crystal display (Twisted Nematic, twisted nematic). In the 1980s, the STN type liquid crystal display (Super Twisted Nematic) appeared, while the TFT liquid crystal display (Thin Film Transistor) technology was proposed. We first talk about the principle of TN-type LCD, STN LCD and TN LCD display the same principle, but the distortion of the liquid crystal molecules are different. The nematic liquid crystal is sandwiched between two pieces of glass, and the surface of the glass is first plated with a transparent and electrically conductive film for the electrode, and then plated with a surface alignment agent on the glass with the film electrode so that the liquid crystal A specific and parallel to the direction of the glass surface. The natural state of the liquid crystal has a twist of 90 degrees, the use of electric field can make liquid crystal rotation, the refraction coefficient of liquid crystal with the direction of the liquid crystal changes, the result is light after TN type LCD polarized polarity changes. As long as the appropriate thickness is chosen so that the polarity of the light changes just 90 °, two parallel polarizers can be used so that the light can not pass at all. And a large enough voltage can make the liquid crystal direction parallel to the direction of the electric field, so that the polarity of the light will not change, the light can pass through the second polarizer. So, you can control the light of the light and dark. As mentioned earlier, STN-type liquid crystal and TN-type liquid crystal display the same principle, but it will be incident light rotation 180 ~ 270 degrees, rather than 90 degrees. Moreover, the simple TN-type liquid crystal display itself only two changes in light and shade. While the STN LCD is light green and orange-based. However, if the traditional monochrome STN LCD display with a color filter, and the monochrome display matrix for each pixel is divided into three sub-pixels, respectively, through the color filter display red, green and blue primary colors, you can display Out of color.

Due to the principle of TN and STN type liquid crystal display, if the display part of it is bigger and bigger, then the central part of the electrode reaction time may be longer. In fact, this is not a big problem for the phone, because the current mobile phone display are relatively small, the impact of liquid crystal reaction time is relatively small. But for notebooks and other equipment need large-screen LCD display, too slow LCD reaction time will seriously affect the display, so TFT LCD technology has aroused the attention of manufacturers. In addition, the color screen in the application of more and more mobile phones in a new generation of products are supported 65536 color display, and some even support 16 million color display, when the TFT"s high contrast, rich color advantage even more important The

LCD screen manufacturers STN LCD is a reflective LCD device, its advantage is small power consumption, but in a dark environment, poor resolution, so have to be equipped with external lighting. The TFT LCD with "back through" and "reflection" in combination, in the back of the LCD set a special light pipe. This is why we see some mobile phone next to the screen seems to have "lights", and some of the phone"s light is like the screen itself issued a reason. Moreover, the LCD screen manufacturers of liquid crystal display backlight technology is also constantly progress, from monochrome to color, from thick to thin, from the side of the fluorescent lamp to flat fluorescent lamp.

By the way, the reflective LCD device has black and white characters (NB) and black and white (NN) two, recently we see the V70 display is belonging to the NB type, of course, this is certainly the integration of the latest technology Enhanced NB. Well, we still get down to business, continue to TFT LCD display principle. TFT liquid crystal display technology using the "active matrix" approach to drive. Method is the use of thin film technology made of the transistor electrode, the use of scanning method "initiative" to control any one of the display points on and off. Light source when exposed through the lower polarizing plate up through the liquid crystal molecules through the light. When the electrodes are turned on, the liquid crystal molecules change like the TN liquid crystal arrangement, and also through the shading and light transmission to achieve the purpose of the display. Sounds like this and TN-type LCD display principle is almost, indeed so. But the difference is that since the FET transistor has a capacitive effect, it is possible to maintain the potential state, and the liquid crystal molecules that have been transmitted will remain in this state until the FET electrode is energized again to change its arrangement. And TN-type liquid crystal does not have this feature, liquid crystal molecules once the electric field, immediately return to the original state, which is TFT LCD and TN liquid crystal display the principle of the biggest difference.

TFT LCD for each pixel are equipped with a semiconductor switch, the processing technology is similar to large-scale integrated circuits. Because each pixel can be directly controlled by the point pulse, therefore, each node is relatively independent, and can be continuous control, this design not only improves the reaction speed of the display, and can accurately control the display gray, so TFT LCD The color is more realistic.

Highly reliable and versatile Monochrome LCD displays are continually evolving and offer low cost solutions with completely flexible designs - ideal for industrial and smart metering applications.

While monochrome STN LCD displays are acceptable, colour graphic displays are becoming more expected in most non-consumer applications and the price point for small displays is surprising close. Upgrading to a colour TFT display is much lower cost than you would imagine.

The benefits of the improved visual appearance more than justify the small additional cost and Anders can support you with the interface and mechanical design. If the display needs to fit an existing case aperture, Anders can provide a full custom display or modify the standard module using our cut-down TFT service and design a bezel or housing to create a perfect fit.

Residential and commercial metering solutions can highly benefit from the high reliability and efficiency offered from STN/FSTN LCD Displays. We can optimise these to suit your application including mechanical integration, coverlens design and backlight enhancements.

When simplicity and low power consumption is key for your portable industrial instrumentations, a STN/FSTN LCD Displays is one of the best technologies to adopt. These displays can be optimised to suit any application requirements.

STN/FSNT LCD Displays are ideal for portable medical devices as they drive very little power consumption and offer an easy integration. Replacing mechanical interfaces to STN/FSTN LCD Displays is possible at a low cost.

Putting your own stamp on your product is more than a logo on the start-up screen. Discover how we can help you design a unique display solution with our customisation services:

We aim to offer reliable and long-term solutions to our B2B customers. If you would like to discuss your display and/or embedded system requirements please contact us below.

When deciding between FSTN vs TN LCDs, the decision comes down to lower cost vs sharper contrast and wider viewing angle. This is the choice to make when ordering a Liquid Crystal Display from FocusLCDs.com.

Note: LCDs are not the same as TFTs or OLEDs. LCDs have one color background and a different color character/segment. There are many advantages of LCDs over other display technologies, but I will not cover that in this article since I want to keep it short and I am almost about out of coffee.

LCDs are built with a fluid placed between two pieces of glass. There are three types of displays available: TN, STN and FSTN. Your choice of fluid determines how the display will look cosmetically.

TN types of displays are used in gas pumps, digital clocks and pagers (If you were born before say 1985 you will need to go to the Smithsonian < http://collections.si.edu/search/results.htm?q=pa...>to see what these were.)

Twisted Nematic [See photo below] was one of the first fluid technologies incorporated in LCD technology. The viewing angle is not as wide as STN or FSTN. Examples of TN LCD displays can be seen in pagers and gas pumps.

Film Compensated Super Twist Nematic [See image below] is considered a better fluid technology than TN or STN. It allows for better viewing angles and better contrast.

There are three types of LCD technologies that use nematic fluid: Character, Graphic and Segment. This is something to keep in mind when comparing FSTN vs TN fluids. Below is a photo and quick description. Note: all three of these can be customized to fit your needs.

Can display all numbers, some letters and custom icons. Great for products that need very low cost and low power. Tooling fees are cheap and we can have samples to you in a few weeks.

Character LCDs display all letters, numbers and punctuation marks. They can be built to display most languages. FocusLCDs carries inventory and in many cases can ship the same day you order.

20x4, STN, Yellow background color, LED, Yellow/Green array backlight, Bottom view angle, Wide temp, Transmissive (positive), with Pins, RoHS Compliant, Controller Driver ST7066-0A

STN (Super-twisted Nematic) provides a sharper image and wider viewing angle than TN (Twisted Nematic). The cost for STN if approximately 5% higher than TN. STN is an ideal fluid for outdoor products that need to be read at various angles.

The Transmissive polarizer is best used for displays that run with the backlight on all the time. This polarizer provides the brightest backlight possible. When you have a need for a bright backlight with lower power drain, transmissive is a good choice.

Focus LCDs can provide many accessories to go with your display. If you would like to source a connector, cable, test jig or other accessory preassembled to your LCD (or just included in the package), our team will make sure you get the items you need.Get in touch with a team member today to accessorize your display!

Focus Display Solutions (aka: Focus LCDs) offers the original purchaser who has purchased a product from the FocusLCDs.com a limited warranty that the product (including accessories in the product"s package) will be free from defects in material or workmanship.