OLED is the future of flat-panel displays because, compared to LCDs, OLEDs are superior in color reproduction, dynamic range, response time, and energy efficiency. However, the latest batch of OLED panels powering laptops and desktop monitors has an issue that OLED TVs do not have—burn-in.
When an OLED panel displays a static image for too long, some areas of the panel can permanently discolor. Some PC monitor manufacturers have realized that they have just sold an expensive and sophisticated technology that might age within the standard warranty period or shortly thereafter, so they are increasingly offering extended warranties for burn-in for their customers. Scientists at Cambridge University believe they have found a breakthrough solution to prevent OLED burn-in.
The scientists discovered that the main culprit behind OLED burn-in is the blue diode. Blue LED has always been an elusive technology, emerging decades after green and red lights. With the advent of blue LEDs, white LEDs became possible, making LEDs the main source of lighting for humans and eventually OLED panels. The energy of the blue diode is relatively high, and it uses a more unusual substrate of gallium nitride. The scientists at Cambridge University found that wrapping the blue diode with an acrylic band could reduce burn-in and improve the efficiency of the manufacturing process.
They published their method in the journal Nature. Unfortunately, it will take some time for display manufacturers to take an interest in this new method and reconfigure their organic light-emitting diode production lines to adopt it—we estimate it will take at least several years.
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