how to see lcd screen in sunlight brands

I"m returning to SLRs after wandering in the point and shoot world for 20 years. I"ve been following the threads here for a while and understand the angst the upcomming new Nikons are causing. My old lenses are Pentax screw mounts, so I"m really starting from scratch.

You should really look at modern Pentax cameras as they are very compatible with older M42 lenses. It was a mistake I made with my first DSLR purchase...I completely discounted these old lenses and changed brands to Nikon only to find out later that they still have some life in them in the Pentax system.

An m42 adapter for Pentax is only about $25 and with it you retain metering, trap focus and these old lenses are image stabilized. And of course Pentax does still make new lenses too.

These, of course, won"t end up being your complete set of lenses for life but it"s nice to have a leg up when just starting out. Who knows? you might have a hidden gem in that old collection of yours.Here is a question I haven"t seen addressed: how readable are the D5000 and D90 LCD screens in bright sunlight? No matter how I adjust settings for the screen on my P&S, there are times were I can"t see anything. I know there is a tree overthere somewhere, but without a viewfinder I"m just pointing in the general direction and hoping for the best.

They all suck. I"ve been thinking of a Hoodman loupe myself (as mentioned in a post above).I like the smaller size/weight of the D5000, but recognize to some extent it is a result of eliminating the extra buttons and dials which give one direct access to those things we like to fiddle with. I can probably get used to going through an extra layer or two of menus, but if the LCD menus are hard to see in bright sunlight I"ve got the same problem.

Most of the size and weight savings are from the use of a penta-mirror viewfinder rather than the superior penta-prism viewfinder used in the higher end models. You may want to try both models and see what a larger brighter finder can or can"t do for you.

I"ve never found the lack of buttons to be a huge handicap on my D40 as the settings are accessible through an "INFO" button rather than through the menu proper. I find that even in bright sunlight I can change settings easy enough ... it"s evaluating a picture that is difficult.I understand the D90 contains an AF motor while the D5000 does not. Presumably this is part of the weight savings. But how much more do lenses with built in motors weigh vs their motorless counterparts? Is it still an overall weight savings?

I don"t think there is any measurable weight savings by using AF (the old style) vs AFS (the newer style with motor). There is, however, often a substantial monetary savings to be had with using AF lenses. Additionally, there are still several AF lenses sold new by Nikon that require the in camera motor (10 primes, 4 specialty lenses and one zoom require the motor). This almost 1/3 of all their lens lineup. All DX lenses are AFS at this time so if that"s where you think you will be exclusively buying then it might not be an issue. It is my opinion that Nikon was premature in pulling the focus motor in their entry level camera bodies. They simply should have waited until their new lenses were all AFS.

Sun is the biggest enemy of LCD displays. It will cause them to heat up, discolor, and eventually turn black. The sun hits the display surface with 1250 watts/m2 of energy, which will cause the temperature of the Liquid Crystal cell to increase significantly, even on the coldest of days. This can have the effect of literally causing the Liquid Crystals to boil and turn black, what is known as solar clearing.

We have all probably seen our phones turn off because they are “too hot” and need to cool down before use, but outdoor displays don’t have the luxury of taking a break when they are too hot. QSRs, media companies, and transit stations rely on the display being on and visible no matter what the ambient conditions are. Keeping LCDs cool is critically important to providing a 24/7 use in all environments, where temperature fluctuates and direct sunlight is always an issue.

LCDs have very low reflection and absorb almost 98% of the solar energy. This means that viewing an LCD outdoors works great because of the low reflection, but keeping it cool is the biggest challenge.

LG-MRI’s patented CoolVu® technology is designed to provide a consistent visual image in direct sunlight and in temperatures up to 50oC with no loss in image quality. The innovative technology begins by using computational fluid dynamics to model the internal temperature of the LCD, LCM, media player, and circuit boards over a 15 year period in real world solar and temperature scenarios. Before we build a product, we ensure that it will perform up to spec in the real world for a 10 year period. The CoolVu® feature uses a dual loop cooling system that immediately exhausts out the heat from the sun and never lets it have an effect on increasing the heat within the unit. Since this heat is exhausted from the onset, we never have to worry about heat buildup from the sun, which lowers our energy consumption and allows us to more comfortably run all of our internal components without the worry of overheating them. CoolVu® is also unique in that zero outside air flows over any electronics or optics within the display. All critical internal components of the LG-MRI displays remain cool, dry, and contaminate free (absolutely clean for life). As an added bonus, all of this is accomplished without the use of air-filters, completely eliminating a common requirement for periodic maintenance found in competitive products.

You could find more details about the comparision of transflective tft lcd and high brightness tft lcd :https://www.szmaclight.com/new/How-to-choose-Sunlight-readable-tft.html

The surface treatment could reduce reflectance on the screen surface. the display are made by many materials layers, such as a Sunlight readable tft lcd display with capacitive touch, from the top layer to bottom layer,it is made by top cover lens --> touch sensors layer-->OCA layer or air gap layer --> top polarizer --> top glass --> bottom glass-->bottom polarizer-->backlight films.

when the ambient light go through the display, the refraction and reflection happened in each layer. the refraction and reflection light combine to diffuse lights inside the display, it lead to display blur to the screen, the situation would be worse under the sunlight that with strong incident light to the screen.

and Anti-Glare film or apply AR coating. it could reduce 2%~3% surface reflectance on the top surface of sunlight readable display. the surfact treatment could be made by additional materials coating on the screen"s surface or an external film on the screen.

An additional linear polarizer on the top of tft screen would also decrease the surface reflectance from ambient light.Or a circular polarizer (O-film) to block reflected light. when

to viewer’s eyes.But the additional polarizers would make the more thickness to the screen, and reducing the brightness of the lcd screen, a surface coating with AR or AG treatment are more effective and popular for the sunlight readable lcd display.

The brightness will be reduced if the module require touch panel or O-Film on it). meanwhile,high brightness displays will generate more heat and use more power than a traditional LCD.

causing worse sunlight readability. We can improve it from two directions.Add AR films or AR surface treatment on both interfaces of internal air gap. it could reduce thereflection ratio from 8.5% to 2%.

Traditional LED display can be in higher brightness when in outdoor working, but common LED screen is hard to make with high resolution(PPI). so it is hard to get a high quality display effect. To the OLED display, even the organic led display(OLED) can be in high resolution, but its cost is more expensive than lcd display. in the same time, LCD"s lifetime is more longer than oled display.

Monochrome lcd display can be used forsunlight readable screen, Its display modes have TN or stn lcd with Positive mode,they are withdark display letters on lighter background. the sunlihgt readable lcd can be reflective or transreflective display mode, the costs are similar for monochrome reflective lcd, transflective lcd, andtransmissive lcd, Transflective or reflective monochrome lcd are the common and economy solution for sunlight readable lcd displays.Since the reflective lcd and transflective lcd has the lowest power consumption than other sunlight readable display, reflective lcd doesn"t need backlight, while transflective lcd only need the backlight in dark environment. the monochrome lcd is easily to custom make, its tooling cost is also cheaper than other custom tft display or oled display.

For lcd displays in daylight and outdoor application, if you"d like color displays, we would suggest sunlight readable tft displays, because the cost of sunlight readable tft is lower than color OLED display, the color tft displays have longer lifetime than OLED display. Different to traditional monochrome lcd, tft lcd screen have full display colors, the high brightness TFT and transflective tft lcd display would be good solutions for sunlight readable outdoor display,

Maclight"s high brightness TFT LCD panels are featured with brightness up to 1000 nits. high brightness tft bychoosing a very bright backlight to keep the display visible even when the sun is on it.we could upgrade the backlight to dramatically increase brightness with our high-quality LED backlights.

Maclight"s sunlight readable display models are available in resistive touch panel and capacitive touch screen, but the brightness would be affected after adding the touch panel. Maclight Sunlight Readable LCD Modules (High Brightness TFT Display and transflecitve tft lcd display module) are suitable for outdoor applications. Maclight transflective tft including 1.8 " , 2.2" transflective tft, 2.4" tranflective tft display, 2.8", 3.0, 3.5" transflective. Maclight"s high backlighting sunlight viewable TFT display sizes including 2.4 “ tft , 2.8” tft lcd, 3.5"tft LCD, 4.3”, 5",7" and 10.1 inch tft lcd, the sunlight readable display sizes are up to 85" , the upgraded backlight brightness can be up to 3000 nits in maximum.

degrees. So, in this range we are safe, we can go very low with the temperature, and it will not become solid, and we can go very high with the temperature up to 110 degrees and it will not become isotropic.

Maybe you have even seen some displays that were used outdoors and sometimes they become black. We call that the blackening effect. If they become black, that means the crystals become isotropic. You can sometimes see that the part of the display is black or sometimes the whole display becomes black, depending on the temperature. The good thing is that it is not damaging the display, so once the temperature drops it goes back to the nematic phase and the display is working again, but in a high temperature you cannot see anything on the display, it is not working.

On the picture above, we have an example from a data sheet of a display with high temperatures. As we said it’s a liquid crystal from -40 to +110 degrees, and this is the latest technology. But you need to be careful! This is only about the surface of a display, the TFT glass itself. If we have the sunlight going to the display it can increase the temperature of the whole display as a module.

For the whole display module, the operating temperature range can be as low as 0 to +50 degrees or -20 to 70 degrees. We can have two operating temperatures, that means if we use the display outdoors, we are safe from the sunlight, the surface of the display can go very high, but we need to control the ambient temperature inside the display housing to not go too high. +50 or +70 will be maximum, usually we need fans to remove the heat from inside. Typically, in our case we have a computer inside and we have more devices that cannot work at high temperatures like +100 degrees, so we control the temperature anyway. So, the temperature cannot be too high inside and for sure cannot be that high as a liquid crystal itself can withstand, which is +110 degrees.

And that will be all in this article about contrast, brightness, and temperatures. Just one more thing: if you are planning on buying a laptop today, you can find brightness in the specification. Look at this number because this will determine how good your laptop will be outdoors. There are laptops on the market today that will have 1000 candelas or even more. If you are looking for a new device my recommendation also goes for mobile phones. Low brightness mobile phones can have 300, maybe 500 candelas, but nowadays the standard will be around 1000 candelas, but there are phones on the market that already have 1500 or even 1800 candelas. That means if you are in the sunlight you will still be able to see the image clearly. Of course, the battery will be drained faster, but sometimes it is not so important, maybe you just want to check something quickly, to read something and you want to have a clear image just be aware that this number is pretty important when you buy new devices!

There are two distinct problems with composing images on screens in bright sunlight. The first is glare, or a reflection of bright light off of the glossy surface of the screen. The second issue that the ambient light is far brighter than the backlight of the screen, and so with your eyes adjusted for the brightness of the ambient sunlight, the image being displayed is simply not bright enough to see. This second problem has been an issue since the invention of photography. Photography pioneers had the problem of not being able to compose a photo with the dim image projected through a lens onto the ground glass of their view cameras. Fortunately they were resourceful folks and we can take cues from their solution to the problem. Though you don’t see it much these days, surely we are all acquainted with the archetype of the old-timey photographer ducking under a black “cape” attached to his camera before making a portrait. The purpose of the black cape or hood was precisely to minimize the issues we’re talking about.

Modern versions are available for purchase, or you can replicate the concept with any old piece of fabric, or perhaps with a jacket or shirt that you have with you anyways. It can get hot under black fabric under the beating sun, so the convention nowadays is to have fabric which is white on one side and black on the other; the white facing out reflects away sunlight, while the black facing in towards your screen absorbs and minimizes any light that may reflect from below onto your screen. Sure it may look goofy but it works!

Like t7iguy, I will also use those reflectors or diffusers sometimes when making photographs under bright sunlight. However those address modifying the light on the subject, not on the screen, and would be a whole other big topic of discussion.

LCD displays are classed as transmissive displays, meaning they do not produce their own light source but rely on another light source to make them visible.

Flat panel LCD displays are built from multiple layers that work together to produce the final on-screen image. At the back of the panel the first layer is the backlight. This is the primary light source for the screen which ultimately makes the image visible. Previously a diffused panel of cold cathode tubes (fluorescent lights) was used for the light source but modern LED technology is more energy efficient and long lasting.

Most modern LCD monitors now use LED’s for their backlight, either around the edge of the screen or as a complete matrix which covers the entire screen area. A full backlight matrix provides many advantages over the edge-lit system. It usually results in a brighter and more even image but it also allows for the controlled local dimming of areas of the screen to help increase contrast and improve black levels. A full matrix backlight costs more than the edge-lit version and also increases the overall size and power consumption of the unit with the trade-off being overall better image quality.

Some screens take advantage of a transflective layer. This layer reflects incoming light back out of the panel increasing the light output of the screen in bright conditions. This technology is most commonly found in smaller screens like automotive screens and portable devices as it is a great way to reduce energy consumption.

However the light behind the screen is produced the next layer in the panel is a polarising filter which aligns the light waves into a single direction. The polarised light now enters the actual Liquid Crystal layer. This layer determines whether the light passes through or not. The panel is made up of individual cells, three cells side-by-side represents a single screen pixel. So a Full HD resolution screen, 1920 x 1080 pixels, would require 6,220,800 cells to produce a full colour image.

Each of the three cells in a pixel represents a primary colour – Red, Green and Blue. The Colour Filter layer consists of rows made from these three colours aligned to the cells below. As all other colours in the visible light spectrum are made from these three primary colours by mixing the intensity of each cell the LCD can produce any colour required. So if you wanted to produce the colour Red on screen the Blue and Green cells would turn on, blocking the passage of light and leaving only the Red cell to light up. As the cells are so tightly packed if all three are turned off to allow the light to pass through the human eye perceives the combination of the primary colours as white light.

Anyone who has taken a laptop outside on a sunny day will know that standard LCD screens do not hold up well in very bright conditions. The main reason for this is that the backlight in the screen is having to compete with the incoming sunlight and inevitably the sun is brighter.

Daylight visible screens have extra bright backlights to help push the image through in high ambient light conditions. The standard measurement of brightness for LCD monitors is cd/m2 (candela per square metre) or Nit (believed to be derived from the Latin word nitere, to shine). 1 nit = 1 cd/m2 so the terminology is interchangeable. Candela is the standard unit of luminance and for screens it is measured over a standard area of 1 metre squared.

LCD screens for desktop monitors typically rate at anywhere between 250cd/m2 and 450cd/m2. Large format Public Display monitors typically range from 350cd/m22 up to 700cd/m2. Some manufacturers claim 700cd/m2 to be a high brightness screen, which technically it is, however it cannot really be classed as daylight viewable. Generally anything above 1000cd/m2 can be considered a daylight screen but as with most technology bigger is better. Screens rated at 2,500cd/m2 and above produce excellent results in very bright conditions. Currently the brightest LCD displays available are rated at 5,000cd/m2.

However having a bright backlight on its own does not make for a good looking LCD screen. Just turning up the light source behind the screen can lead to washed out colours, poor contrast and a generally disappointing image. To produce great looking and vivid images your screen needs high levels of contrast and accurate colour reproduction. A full matrix LED backlight allows for high brightness but combined with local dimming it can create high contrast images with deep black levels. By calibrating the colour of the screen you can help produce more natural looking colours. Many LCD screens are prone to a bluish tint leading to colours looking cool. Ensuring your screen is properly calibrated helps maintain a true colour reproduction leaving skin tones looking natural and whites as pure white.

The other issue affecting LCD panels that are used in sunlight is their susceptibility to damage from the heat of the sun. When the Liquid Crystal layer is heated the crystal warps resulting in dark patches forming on the screen. If removed from the heat these patches will usually cool and return to normal but repeated exposure will eventually lead to permanent damage. Professional high brightness displays use LCD panels that are rated for operation under extreme temperatures and do not warp or blacken.

A good quality high brightness screen will look great in all conditions. The added brightness makes your content shine whether it is installed inside or out. As with most visual things you have to see the difference these screens produce for yourself. Photos of these screens just do not capture the true quality of the image when compared to standard screens.

It can be difficult to read an LCD display under intense sunlight, especially when it does not have adequate sunlight-readability features. People working on this equipment outdoors would have to work hard to make sure that the screen is readable.

Fortunately, technological advancements are underway to resolve technical issues and other problems faced by individuals who regularly use outdoor LCDs. In the meantime, if you are looking for technical fixes that address the lack of sunlight readability in LCD displays or screen panels, keep these solutions in mind.

A simple solution to improve readability in bright outdoor locations is to turn up the brightness to the maximum level. This will help offset the glare produced by the sun’s rays.

Besides cranking up the brightness, you may want to go for optical bonding as your next technical solution. The goal of optical bonding is to shield the external layer of the LCD display from damage. This damage is usually caused by the sun, water, dust, dirt, and other debris. This process consists of laminating the surface layer of the glass to combine with the elements of the LCD inside the display. Afterwards, a bonding agent, such as silicone or urethane, fills the gap between the LCD layer and the glass. This stops potentially dangerous elements from piercing the surface.

Other than safeguarding the internal mechanisms of the LCD device, optical bonding provides better visual clarity for the user by minimizing the amount of glares, reflections, and shadowing caused by the sun.

Apart from making the screen unreadable, sunlight can also cause the temperature of the device to rise quickly. When a device overheats, it causes the solid LCD crystals to melt. This results in the screen to turn black and become unusable until the crystals cool down and harden again. Thus, it is crucial to install a properly designed ventilation structure in these outdoor devices.

Besides ventilation, mounting an outdoor LCD displays requires protection against the sun. Sunlight contains ultraviolet (UV) rays. Prolonged and excessive exposure to these rays can damage the LCD device. It can affect the display to the extent where it will decrease the readability, which is why it is vital to apply a high-quality protective film. Doing so preserves the lifetime and sustainability of the LCD device.

On top of UV protection, you should also protect an LCD display with an infrared protective film. Infrared light beams give off heat. An LCD display not adequately shielded with infrared could cause the device to overheat and cause damage to the display. Having a working anti-infrared solution will protect the device and improve sunlight readability.

If you are seeking LCD display with sunlight readable technology, contact Microtips Technology. Some of our OLED display modules, such as the White 20×4 OLED display, have sunlight readable enhancements, such as polarizers and special films. Rest assured that our products do an amazing job in displaying all kinds of pictures, text, and full motion video.

Visible in sunlight-readable display TFT LCD Module does not fully recover its color in sunlight, but it can still be seen clearly, with only a slight change in color.TFT is divided into semi-penetrating and reflective types. In the sunlight, the semi-transparent brightness will have a certain degree of reduction, the color deviation will also have a certain degree of change, which is generally acceptable.

The outdoor sunlight-readable display effect of reflective TFT is better than that of semi-penetrating TFT because the former is displayed by the brightness of a complete backrest light plate, while reflective TFT is similar to the mirror, which can improve the display brightness by borrowing the ambient brightness. Therefore, the higher the ambient brightness is, the higher the screen brightness will be.

This paper makes a comprehensive comparison between high brightness TFT LCD and horizontal TFT LCD from the aspects of technical parameters, display performance, and cost evaluation. After reading this article, you will have a deep understanding of sun-readable TFT and how to select sun-readable TFT LCD to select the most suitable commutating TFT LCD or high-brightness TFT LCD for your outdoor display.

As can be seen from the parameters, STONE STVA035WT-01 is a sunlight readable TFT LCD module with a brightness of 1000 CD /m2. The color TFT LCD has a 320×240 resolution, supports RS232/USB ports, has a 3.5-inch diagonal size, and has resistive and capacitive touch screens. The TFT model has a built-in Cortex M4 driver chip.

The 3.5-inch daylight readable TFT LCD has a logical power supply voltage (V) ranging from 6V to 12v, with a maximum of 40V. With led backlight, the Angle of view is 70/70/50/70, when the grayscale is reversed 12, the aspect ratio is 4:3. It can work at -20℃~ +70℃, and the storage temperature is -30℃~ +80℃.STONE daylight readable TFT LCD is an ideal choice for outdoor industrial measuring instruments, testing equipment, measuring tools, outdoor display, and other industrial electronic equipment.

Because of the requirement of the display that works in a bright environment and direct sunlight, the requirement of a TFT LCD screen is higher and higher.

Horizontal reflection TFT displays have a layer of reflectors in front of the backlight. Incident light bounces off the reflective layer and is used to illuminate the TFT display. Therefore, the TFT LCD module has two characteristics of “transmission” and “reflection”.

1. The reflective TFT display has good readability under bright ambient light and direct sunlight. Transmission TFT LCD displays can only work under backlight, while transverse reflection TFT displays are characterized by a reflector on the color filter of the TFT unit, so the incoming ambient light is reflected in the TFT reflective layer and then illuminates the display. Thus, the readability of the content is perfect in very bright sunlight, even without backlighting.

2. Compared with the traditional “transmission only” display, another advantage of the cross-flow TFT LCD display module is power saving. Cross-flow TFT LCD displays combine the advantages of both transmission and cross-flow displays so that TFT displays are fully readable under almost any ambient light condition. In addition, they are highly energy-efficient and are ideal for battery-powered devices and mobile applications. In a bright environment, customers who use a retro-streamlined TFT-LCD can save power by reducing or turning off the backlight of the display, due to the dominance of “reflection” mode.

The horizontal TFT LCD modules of brands such as Winstar Raystar have higher horizontal flow. If they only use the semi-transparent reflective polarimeter back delivery TFT LCD with a reflectance of only 2%, then it is not a true semi-transparent reflective TFT LCD.

The STONE sunlight-readable display module adopts the “transmission” mode, which improves the TFT-LCD panel structure, expands the color reproduction range under the “transmission” mode, and realizes a new TFT-LCD module, which gives full play to the advantages of the transmitted TFT LCD module in a vivid display of color.

There is no best, only the most suitable, through the general introduction of this article. Have you decided what type of LCD display module to choose for your outdoor sunlight-readable display module?

First, the display screen on a sunlight readable/outdoor readable LCD should be bright enough so that the display is visible under strong sunlight. Second, the display contrast ratio must be maintained at 5 to 1 or higher.

Although a display with less than 500 nits screen brightness and a mere 2 to 1 contrast ratio can be read in outdoor environments, the quality of the display will be extremely poor. At i-Tech, a truly sunlight readable display is typically considered to be an LCD with 1000 nits or greater screen brightness with a contrast ratio greater than 5 to 1. In outdoor environments under the shade, such a display can provide an excellent image quality.

Luminance is the scientific term for hotopic Brightness?which specifies the visual brightness of an object. In layman"s terminology, it is commonly referred to as brightness? Luminance is specified in candelas per square meter (Cd/m2) or nits. In the US, the British unit Foot-lamberts (fL) is also frequently used. To convert from fL to nits, multiply the number in fL by 3.426 (i.e. 1 fL = 3.426 nits).

Luminance is a major determinant of perceived picture quality in an LCD. The importance of luminance is enhanced by the fact that the human mind will react more positively to brightly illuminated scenes and objects. Users are typically more drawn to brighter displays that are more pleasing to the eye and easier to read. In indoor environments, a standard active-matrix LCD with a screen luminance around 250 nits looks good. However, a sunlight readable LCD with a screen luminance of 1,000 will look even more beautiful.

Contrast ratio (CR) is the ratio of luminance between the brightest �white� and the darkest �black� that can be produced on a display. CR is another major determinant of perceived picture quality. If a picture has high CR, you will judge it to be sharper and more crisp than a picture with lower CR. For example, a typical newspaper picture has a CR of about 5 to 7, whereas a high quality magazine picture has a CR that is greater than 15. Therefore, the magazine picture will look better even if the resolution is the same as that of the newspaper picture.

A typical AMLCD exhibits a CR between 300 to 700 when measured in a dark room. However, the CR on the same unit measured under ambient illumination is drastically lowered due to surface reflection (glare). For example, a standard 200 nit LCD measured in a dark room has a 300 CR, but will have less than a 2 CR under strong direct sunlight. This is due to the fact that surface glare increases the luminance by over 200 nits both on the white and the black that are produced on the display screen. The result is that the luminance of the white is slightly over 400 nits, and the luminance of the black is over 200 nits. The CR ratio then becomes less than 2 and the picture quality is drastically reduced.

i-Tech sunlight readable LCDs with 1500 nits screen brightness will have a CR over 8 with the same amount of glare under the same strong sunlight, making the picture quality on these units extremely good. For further reading on contrast ratio, please see Tech Note 0101, Page 2, the Display Contrast Ratio.

The viewing angle is the angle at which the image quality of an LCD degrades and becomes unacceptable for the intended application. As the observer physically moves to the sides of the LCD, the images on an LCD degrade in three ways. First, the luminance drops. Second, the contrast ratio usually drops off at large angles. Third, the colors may shift. The definition of the viewing angle of an LCD is not absolute as it will depend on your application.

Most LCD manufacturers define viewing angle as the angles where the CR (contrast ratio)^3 10. For LCDs designed for less demanding applications, the viewing angle is sometimes defined as the angles where the CR^3 5.

For LCDs used in outdoor applications, defining the viewing angle based on CR alone is not adequate. Under very bright ambient light, the display is hardly visible when the screen luminance drops below 200 nits. Therefore, i-Tech defines the viewing angles based on both the CR and the Luminance.

All LCD backlights powered by cold cathode fluorescent lamps (CCFL) require inverters. An inverter is an electronic circuit that transforms a DC voltage to an AC voltage, which drives the CCFLs. i-Tech Technology manufactures inverters for all its products. Additionally, Applied Concepts and ERG also provide inverters for our products as well.

The dimming range or dimming ratio of an inverter specifies its capability of performing backlight luminance adjustment. For inverters used in notebook computers and LCD monitors, the backlight luminance can be adjusted typically over a dimming range of less than 10:1. That is, the luminance is adjusted from 100% down to about 10%.

For very high brightness backlights used in i-Tech Technology sunlight readable LCD modules, the inverters must be able to provide a much wider dimming range. Otherwise, the LCD screen will be too bright during nighttime conditions. Therefore, our inverters provide a typical dimming ratio of 200:1, meaning that the luminance can be adjusted from 100% down to 0.5%.

Dimming capabilities are beneficial because lowering the backlight luminance will result in a lengthening of the backlight life. It also lowers the power consumption and the related thermal management issues.

Any high brightness backlight system will consume a significant amount of power, thereby increasing the LCD temperature. The brighter the backlight, the greater the thermal issue. Additionally, if the LCD is used under sunlight, additional heat will be generated as a result of sunlight exposure. Temperature issues can be handled through proper thermal management design.

We provide TFT LCD with reflective mode of illumination without compromising its transmissive illumination. With the imposed reflective function, the modified LCD can reflect the ambient light passing the LCD cell and utilize the reflected light beams as its illumination. The stronger the ambient light is, the brighter the LCD will appear. As a result, the modified LCD is viewable under all lighting conditions including direct sunlight regardless the LCD"s original brightness.

The market demands for outdoor LCD applications are expanding, such as mobile navigator/video systems, PDA, personal organizer, Tablet PC, notebook computer, and Kiosk display etc. However, a regular transmissive LCD is very difficult to read under strong ambient light. This limits the outdoor applications of a conventional transmissive LCD.

The high bright LCD and the transflective LCD are the solutions generally utilized for outdoor applications. However, both solutions have some shortcomings. Because of the added lamps, high bright LCD creates some undesirable problems, which include high power consumption, excessive heat generation, increased dimensions, electrical circuit alterations, and shortened LCD lifetime. Thus, it is usually troublesome and costly to accommodate a high bright LCD in systems. Though giving good performance under the direct sunlight, the transflective LCD trades of its indoor performances.

Problems noticed in transflective LCD include narrow viewing angle, discoloration, low brightness, and loss of contrast. Moreover, the transflective LCD is currently limited in choice of sizes and resolutions.

On the other hand, a Transflective LCD is readable everywhere including outdoor environments without extra power consumption and excessive heat generation. The indoor viewing qualities are also enhanced. The modified unit fits right back into its original system with no need of any alteration and extra effort. Thus in your choice of size, resolution, and model, a direct sunlight readable LCD is conveniently incorporated into your device.

i-Tech is a premier supplier of optical bonding and performance added passive enhancements for all flat panel . i-Tech Optical Bonding process produces an optical bond between any display cover glass or touch panel, and any size LCD.

In the world of LCD"s, i-Tech takes display enhancement to a new level above all others. Utilizing advanced proprietary optical bonding technology; i-Tech overcomes optical challenges for display product manufacturers at an affordable price. In a wide range of applications, standard liquid crystal appear to "washed out" in high ambient lighting conditions. This wash out is due to excessive reflections and glare caused by bright light.

Commercially available LCDs, especially when protected by a separate cover glass or plastic shield, can not deliver enough brightness to make the display functional in outdoors or in other high ambient light applications. The exclusive Optical Bonding process from i-Tech provides a significant reduction of ambient light reflections at an affordable price, compared to other display enhancement technologies.

Optical Bonding seals either a top cover glass or touch screen directly to the face of the display bezel. Our bonding process eliminates the air-gap between the display and the cover glass, vastly reducing reflective light, which causes visual washout of the display image. Optical Bonding also enhances structural integrity by supporting the LCD assembly with the cover glass. The bond maintains perfect display uniformity while providing shock protection, unlimted humidity protection, and elimination of fogging caused by trapped moisture accumulating in typical air-gap assemblies.

Sunlight viewability of a display depends on the differences between "lumination" and "illumination" of the display. The lumination of the display is its brightness. A display"s brightness, typically referred to as a Nit (Candela per meter/2) is the amount of light energy coming out of the display. Illumination is the amount of ambient light shining onto a display. The readability of a display is dependant on the amount of light that is being reflected off of the display.

Light travels through a variety of transparent materials; such as air, glass, plastic, and even water. These material"s abilty to transmit light is measured by their "indices of refraction". As light transfers from one material to another, such as air to glass, the differences the index of refraction will cause reflection. In the case of an air-to-glass interface, the reflection will be slightly less than 5% of the ambient light. All surfaces that have an index mismatch will reflect and the reflection is cumulative. In the case of a standard glass or plastic window, there are three surfaces with an index mismatch which will create a total relfection of nearly 15% of the ambient light. If the total reflection (in nits) is close to the displays brightness, the contrast of the display will be reduced to the point where the display"s readabilty is reduced to unacceptable levels.

Optical Bonding from i-Tech is a solid, transparent bond which optically couples the front cover glass or touch screen directly to the face of the display. This internal bond eliminates reflection from the two internal layers. The outer surface of the window is treated with anti-reflecting coatings which matches the front surface of the glass with the index of refraction of air. This combination reduces the total reflection of the display and front cover glass to less than 2% of the ambient light. A reduction of reflection of this level, all but eliminates reflective loss in most ambient lighting conditions. With reductions of this level, displays with 300-500 nits of brightness will be viewable in daylight or indirect lighting conditions. At 500-800 nits brightness, most displays will be completely sunlight viewable.

Aside from the optical quality, Optical Bonding elminates the air-gap which prevents heat build-up from the "greenhouse" effect and prevents fogging from moisture or contamination from dirt or particles. It also offers shock protection and other damage to the LCD itself.

iTech IP65 Front and Full IP66 Chassis are designed for those applications require IP ( Ingress Protection ) feature, like chemical industry, food industry and medical industry. However, the IP65 Front and Full IP66 chassis might get moisture condensation issue for the applications under direct sunlight.

We provide two different choices of optical enhancement solutions that include anti-reflective coated and/or anti-glare protection glass. These technologies can be widely used in outdoor and indoor environment by enhancing optical performance of displays.

The anti-reflective coatings on the protection glass have excellent performance in tough ambient light conditions. With the normal glass, the strong reflection of the ambient light diminishes visibility and causes problems for viewer. Our special anti-reflective coated protection glass can increase contrast by enhancing light transmission rate over 95% (light reflectance rate less than 5%) and can effectively diminish the mirror images. The multi-layer vapor deposition coating either on one side or two sides of glass is designed to minimize reflectance and maximize transmittance.

Another solution, with an anti-glare (AG) coated protection glass, a microscopically rough surface laminated onto the topmost of display can diffuse glare. The chemically etched glass that has a slightly textured finish can reduce reflection by scattering light directed on its surface. It can soften the image of direct light sources visible in the reflection of the viewing area.

Clearing Point - The temperature at which the liquid crystal fluid changes from a nematic into an isotropic state. In practice, a positive image LCD will turn totally black at this temperature and will therefore be unreadable. Because the clearing point is different for every fluid type, ask for design assistance from your supplier if high temperature operation is critical in your application.

Also, for most cases, both TN, HTN and STN utilize the phase known as nematic for display purpose. Within this phase, the liquid crystal has a "rod shape" exists within the solution which has fast response and has excellent electro-optic properties. This phase, however, only exists within a limited temperature range. The higher end of this temperature range is known as clearing point, above which, the liquid crystal lost its birefrigerance properties and cannot bend the light path anymore. Thus the polarizer will then be the only factor which affect incoming and out coming light. When the LCD is cooled down to below its clearing point, the display should be working again. The temperature for the clearing point varies greatly from material to material and you should contact our engineers regarding what you have. Normally a safe margin should be used to avoid clearing point when designing the display.

Isotropic Stage The point where the fluid heats or cools to where it is no longer in the twisted nematic state. Since the molecules can no longer twist light, all incoming light is absorbed.

The lighter sensor measures the outside brightness according to different environments and sends the information to display. Display will adjust the brightness automatically.

With lighter condition (Outdoor/Sun-light) the brightness will increase; in the opposite condition, the brightness will be decreased to fit darker environment.

Light sensor detect the change of illumination outside, then it send the signal to MCU via I�2C interface. MCU will ask inverter to switch the brightness if the outside illumination was change over the default. MCU will transmit PWM signal to the inverter, amd the inverter will change the brightness of panel.

Each step has its own illuminate range according different environment illumination. This technology makes the use of visual application more friendly and intelligently.

Winmate �light sensor� technology are now available for 8.4�, 10.4�,12.1�, 15�, 17�, and 19� LCD with specific panel option. Please contact with sales for more detail information.

TouchScreen Solutions is a specialist manufacturer of touchscreens, optical filters to enhance the performance of electronic displays, and transparent composites.

By utilising TouchScreen Solutions�s traditional lamination expertise, touchscreens are designed to provide the highest levels of light transmission, excellent readability and unsurpassed protection against a wide range of physical threats. The touchsacreens are accurate, highly dependable and have a rapid response time

The electronic controls effectively divide the screen into pixel sized sensing cells, using microfine wires which are not visible on a powered display. These wires are connected to a controller board, and an oscillation frequency is established for each wire. Touching the glass causes a change in the frequency of the wires at that particular point, the position of which is calculated and identified by the controller. Unlike other capacitive systems where the operator touches the actual conducting surface of the sensing panel, the active component of the sensor can be embedded up to 25mm from the touch surface ensuring long product life and stability.

The touchscreen can be supplied with the options of anti�glare or anti-reflection coatings, thermal toughening or chemical strengthening and privacy or contrast enhancement filters. The front glass of the touchscreen acts as a dielectric and enhances the capacitance of the touchscreen.

The driver software allows the touchscreen to interface with the host computer�s operating system by emulating the behaviour of a computer �mouse� and translates taps on the touchscreen surface into mouse clicks.

Touchscreen is proven to meet today�s demanding requirements for ATM�s, web phones, ticket machines, medical displays, industrial displays, pay-at-the-pump gas machines, and interactive kiosk systems. The touchscreen is durable and dependable, its construction protects against damage caused by moisture, heat and even vandalism.

The touchscreen comprises a laminated glass sensor, which encompasses the sensing medium, and the control card which connects to the communications port of the computer.

Female D9 serial connector on a 3 metre long, 3 wire, lead. Maximum length of lead - 10 metres. Power supply components in connection -2 diodes, 1 resistor and 1 capacitor .

Simple calibration and set-up with Windows 98, NT, 2000, XP and Linux. Mouse emulation with Select on Touch, Select on Dwell, Select on Release and Drag and Drop.

Recently there many end customer was mislead believing high brightness (over 2000nits, even up to 5000nits) is the better solution. But there are few concerns that the so called extreme high brightness (3000nits to 5000nits) panel manufacturer don"t tell you:

1. How much power consumption is the extreme high brightness LCD? It is very important because all of our outdoor LCD is in completely sealed enclosures keeping it cool is a very huge Challenge. Not mentioned the hot temperature around 40-50C area.

2. Also, you need to determine how far is viewer distance. Because high brightness (3000-5000nits LCD) might Damage eyesight if the viewer is too closed. LCD is design with high resolution for people to see it very closely, so extreme high brightness doesn"t make sense for outdoor LCD. If they want to put on extreme high brightness LCD on roof top to attract audience which LCD is not even big enough for seeing from far away. Most case customer will use LED which is more reliable and cost effective if it is larger than 82".

3. High chance rejection from city sign official. Many LED billboard brightness can goes up to 5000-7000nits, but the local government agency will not approve this brightness, because it is traffic distraction for driver or other people. So, it doesn"t make sense to spend a fortune on extreme high brightness but need to dim it down back to 1000-1500nits.

4. Viewable under sunlight is not just brightness only, it involve contrast ratio, reflection of the front glass and content graphics contrast such as (red and white). Sunlight readable is combination of all above, not just brightness only.

4. Viewable under sunlight is not just brightness only, it involve contrast ratio, reflection of the front glass and content graphics contrast such as (red and white). Sunlight readable is combination of all above, not just brightness only.

3. All the major branded LG and Samsung LCD manufacturer the most brightness that they do is only 1000-2000nits because we believe this major LCD maker already done a study on what is the most feasible and comfortable LCD brightness for outdoor. That"s why all the high brightness (3000-5000nits) maker is after market vendor without any study about the what is most suitable brightness for different applications, only advertising high brightness is not the solution. If you ask these vendor for outdoor enclosure which they will not provide or guaranteed it will work because they know it is a huge Challenge to cool down the display. Just like you are buying a 800 horse power car, but you still need to design the car frame and cooler to make this engine run safely on the road, which this extreme high brightness won"t help you to design that.

Backlit LCDs provide excellent visibility indoors, but require high-brightness backlights to produce enough brightness for for direct sunlight readability - 1000 nits or more, to be exact. All that brightness requires a lot of power to operate, making traditional high-brightness LCD signage costly in multiple ways.

Sun Vision Display panels actually turn sunlight into an asset through their reflective LCD technology.They"re the perfect solution for sunny locations. In fact, as sunlight or ambient light shining on the display increases, so does the brightness of the Sun Vision Display panel"s image - all while consuming almost no power (less than 6 watts). No need to shield the display from the sun!

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The High Brightness LCD Screen provides clear, readable and engaging digital signage in direct sunlight. With anti-glare technology and reliable operation up to 104°F, this digital signage display is ideal for outdoor use all year and in any weather.

By being readable in bright sunlight, the High Brightness Screen gives you the advertising edge you’ve been looking for. The weatherproof display provides the perfect focal point for outdoor locations, capturing attention and boosting brand awareness in shopping malls, train stations, stadiums and more.