lcd screen yellowing brands

The above-mentioned optical properties are of course the basic requirements of LOCA adhesives. The next challenge is to be certain that these optical qualities will be retained and consistent over time under real-world operating conditions. It is in this regard that b* number becomes a useful tool. The b* number is especially important in its consistency over time as yellowing of screens is considered highly undesirable and indicative of aging or failure in the eyes of consumers.

Many environmental conditions have been shown in the past to lead to a yellowing of LOCA materials over time and a corresponding deterioration in image quality. By measuring the CIELAB coordinates of a given device after initial manufacture, it is then possible to expose the device to harsh conditions and measure any changes in CIELAB numbers.

Each of these tests and all of them combined is designed to simulate years of real-world aging in environments such as in automobiles and appliances. By showing consistency over time under these conditions of the b* value, manufacturers can be confident of resistance to yellowing for LCD displays. In addition, customized testing is not uncommon in cases where a product may be exposed to unique or especially harsh conditions.

Chase Corporation, Westwood, Ma., founded in 1946, is a leading manufacturer of industrial products for high-reliability applications with a global customer base operating in diverse market sectors. Our HumiSeal® group specializes in the manufacture of polymers for the protection of PCBs. In addition, the HumiSeal group produces the Vivid Cure line of LOCA adhesives for LCD display manufacture. Our outstanding manufacturing and technical support groups can provide your organization with a reliable global supply, unmatched quality, and superior technical support.

My Sharp Aquos LCD tv model LC-C6554U has some vertically oriented oval-shaped yellowish discolorations in the upper left corner, upper right corner, and upper middle. The rest of the picture is perfect and these areas are only visible with a light image color, such as sky or snow. I’m hoping this is repairable as the rest of the TV functions perfectly. Any thoughts? Thanks.

The only time I"ve seen a yellow tint on an LCD panel it was caused by moisture which somehow got into the LCD panel (more specifically the backlight diffuser layers behind it).

This kinda damage isn"t fixable, even if you go to the extreme of taking the actual LCD panel apart, trying to clean the backlight diffuser sheets by hand (been there, done that)

@brandonwh64: a solid line of lit pixels usually means bad LCD panel. The tab bonds (where the flex cables meet the actual glass panel) are coming loose, causing randomly lit/unlit lines or rows because the pixels don"t get control signals. No way to fix it properly. Just temporary solutions.

I just noticed the same problem. I dont suffer from the flickering that some are seeing but I can see the yellowish coloring at the bottom of the display. I"m not very happy at all. The screen brightness is terrific, but this yellow hue is annoying.

But tonight I also noticed this yellow hue. To me its again on the left side of the screen more than the rest, and the bottom. I"m getting pretty frustrated with the whole experience so far. No complaint about the brightness. Color is a different story.

The "shoulder" is smoother in the 17" screen, meaning that transition from detailed highlight to no-detail (pure white) is less abrupt, more photographic so to speak.

I can"t believe all of the complaints about the LED screen. Mine is A+ and if anything the LED screen is brighter and the colors are more vivid on an LED screen vs. the old CCFL"s. I"m also impressed with the "instant on" power of the LED screen. There is no warmup involved like on the old screens that take a while to get to full brightness. It sounds like many people are having some issues but thankfully I"m in the clear!! I"m glad too...b/c I don"t have time to fool around with returns etc. Thanks.

I had a chance to go to a different Apple store today and looked at (3) 15" MacBook Pro"s. They ALL had the "slight" yellow hue on the bottom 1/3 of the screen. Could this be a manufacturing problem or a calibration problem???

I"ve gone to 3 apple stores and looked at all of their MBP"s. All of the 15" models (glossy and matte) had the yellowing problem. The flickering/shimmering/interference seemed show up mostly on the matte versions, the glossy didn"t seem to flicker nearly as much. But the flickering definitely didn"t happen to all of them and none of them were as bad as the one I had returned.

hi guy, i recently got a brand new glossy MBP too, i tried look at the screen from different sides (that"s assume you guys aren"t talking about looking at the screen directly and notice the yellowish color), the only one side that wasn"t look yellowish to me was when I looked at it from the top to the bottom, otherwise from the left, the right, or the bottom to the top i noticed an evenly light yellowish color on the computer screen, so is that means my MBP has the same problem like many others?

I bought one of the new MBPs with the led screen. I can say that looking at the screen from an extreme viewing angle such as looking at it directly from the side, it does have a yellowish hue to it. However, when you look at it from normal viewing angles such as in normal usage then it does not have a yellowish hue and it is quite an excellent screen.

Guy"s I highly recommend calibrating the display with the ColorSync program in the Utilities folder. All of the MBP LED"s have this(mine DID). It is because the default color profile is not calibrated for LED back lighting(in my opinion). Running ColorSync corrected the yellow problem. If you don"t want to run Colorsynce just go system preferences>displays> and choose the color tab. Once in the color settings choose any profile besides besides color LCD and you will see a huge difference.

Electronic products will have some minor problems over a long period of time, and the same is true for the stretched LCD bar screen. What kind of issues will occur when the stretched LCD bar screen is used for a long time? The stretched LCD bar screen is used for a long time, the faults of the LCD screen are rough as follows: white screen, blurry screen, black screen, dark screen, yellowing, white spot, bright line, bright band, dark line, dark band, outer membrane scratch, etc.

Among these faults, it is relatively easy to repair the dark screen, yellowing, white spots, and outer membrane scratch. The dark screen is actually the aging of the lamp tube, and it is enough to replace it directly. The yellowing and white spots are both issues of the backlight source. Corresponding backlight sheet or light guide plate can be solved. Scratching of the outer film means that the polarizer covered on the surface of the liquid crystal glass is damaged, and it can also be replaced manually.

Of course, there are many precautions when implementing these faults that can be solved by replacement. When replacing the lamp, pay attention to installing it in place to avoid light leakage; when dealing with the backlight, pay attention to dust prevention, otherwise, you will see dust spots after the screen is lit.; When replacing the polarizing film, it is necessary to avoid crushing the screen when the film is torn off, and dust is taboo. Once dust enters the film, air bubbles will be generated, the polarizing film will basically be scrapped, and the polarizing film needs to be replaced again.

The protective film of the screen is recommended to be attached when the stretched LCD bar screen is not in use, and then removed when the stretched LCD strip screen is used, which can effectively protect the chemical coating on the outer layer of the screen so that the most The outer coating will not be oxidized prematurely. During the process of using the screen, the user must not easily touch/press the LCD screen or use a hard object to contact the screen. If you don"t pay attention often, there will be scars such as white marks that can never be erased on the long LCD screen for a long time.

I don"t think there"s a fix, though I"d love to know if there"s a solution other than outright replacing the screens. From what I understand the yellowing is just a flaw in the LCDs and even some brand new units from way back when had the issue. I found some forum posts from 2006 concerning yellowed screens when I realized my DS Lite"s top screen was yellowing recently so I guess this has always been an issue with these specific LCDs.

If your business frequently relies on projected presentations for training or sales, it"s crucial to keep your audio-visual systems working in peak condition. A yellow-toned discoloration can reflect poorly on your brand and make your presentations a lot less effective. The first step in correcting discoloration on your screen is to pinpoint the precise problem, which is usually either the screen itself or a problem with the projector.

Yellow tones in your projected visuals are due to one of two sources: the projector lamp or the screen itself. To determine which is the cause of your yellowing issues, visually inspect your screen in natural light. If at all possible, physically move the screen outside on a clear, sunny day and visually compare its surface to a white sheet of paper. If you can see the difference between the two tones, the problem is likely your screen. If both appear close in tone, the problem may lie in your projector’s lamp.

If the screen is not actually discolored, then something in the projector or the cabling is the most likely culprit behind the yellowing. The most common causes are:

Faulty polarizers: Optical components of a projector include polarizers that control the colors as they pass through LCD panels. When the polarizers begin to fail, the projection signals this with discoloration in spots, leading eventually to a full-screen discoloration.

If the screen itself is discolored, the causes can usually be found in the room where the screen is used. Environmental factors are almost exclusively to blame for yellowed screens.

One of the biggest culprits is cigarette smoke. Cigarettes contain over 4,000 various component chemicals, and many of these will stain surfaces including projector screens. To remedy this potential source of discoloration, prohibit smoking in the room where your business stores and uses the projection screen.

Faulty ventilation may also be to blame. Ensure that the room housing your screen is well-ventilated to prevent an accumulation of fine particles that can discolor its surface.

A buildup of chalk dust can also cause yellowing of your screen. If the room in which the screen is primarily used contains a chalkboard, consider switching to a whiteboard. At a minimum, ensure the screen is properly protected when the chalkboard is in use.

Identifying the likeliest cause of your screen’s discoloration and then addressing that cause is the best way to ensure your screen remains in good condition going forward.

Wear gloves before cleaning your screen. This will help prevent an accumulation of body oils and fingerprints, which can trap dust and other fine particles. Gloves will also help prevent small fibers being left behind.

Use a soft, lint-free, dry cloth to wipe away any fine particles. Microfiber and cotton both work well for this purpose. Avoid the use of harsh chemicals, as these can cause further damage to the screen.

Once you’ve cleaned off as much as you can, if the screen is still yellowed, you have only a few options. First, you can purchase a new screen. You can find workable alternatives at many price points with a little internet research and comparison shopping.

However, this is almost always a significant purchase, even with those precautions. This leaves the option of painting your screen. Small business owners with tight budgets often embrace the “DIY” philosophy, and in this case, the fix may be as inexpensive as a gallon of paint.

Latex paint or any paint designed specifically for use on vinyl siding is ideal for painting fabric projection screens. This will help to avoid cracking paint on the surface as the screen rolls and unrolls for use. A roller is generally the simplest method of application.

The yellowish, pressure sensitive hue you described sounds like backlight bleed. A lot (most?) LCDs suffer this to varying degrees. Some of it is due to pressure from the bezel/frame, some is inherent in the tech and can"t be easily mitigated.

If what you"re dealing with is indeed backlight bleed, a replacement screen/laptop/RMA service will almost certainly leave you with a similar looking screen (maybe better, maybe worse).

Redmi officially released the new Redmi K30 series mobile phone, but the design of the digging screen has once again caused the yellowing of the digging screen. In this regard, Lu Weibing, general manager of the Redmi brand, also popularized the digging screen scheme used by the Redmi K30 display.

Lu Weibing first introduced the characteristics of the LCD screen: the LCD liquid crystal layer is only 3μm, very thin and very fragile material. The liquid crystal layer is covered with two parallel layers of glass (CF color film and TFT substrate). The two glasses are ideal. In the state of maintaining parallel, the liquid crystal theoretically does not yellow, only when the parallel state of the two layers of glass is broken, the screen will yellow when the uniformity of the liquid crystal changes.

Increase the density of support columns. A large number of PS support pillars are added around the hole, and the density of the support pillars is much higher than that of ordinary screens, ensuring the stability of the two glass structures around the hole.

At the same time, Lu Weibing added that the Redmi K30 uses new processes including low-shrink polarizers and upgraded dispensing technology, all of which allow the screen structure to achieve long-term stability.

Redmi K30 uses the industry’s smallest LCD aperture and has a diameter of only 4.38mm. Why we can be the smallest can be summarized as “three reductions”.

Since there is no on camera colour management avilable, so it is not possible to profile the screen, on ANY camera this is just something you will have to put up with.

Apart from using the histogram for exposure information the only thing that you can really check for using the on camera LCD screen is focus, by zooming in, and general composition. Everything else will have to wait until you have downloaded the the pictures to a properly calibrated computer system.