OLED screens, used in televisions and monitors, are known for their deep blacks, high contrast, vivid colors, and sharp images. However, they also have a flaw called screen burn-in, where a permanent image appears on the screen, visible even when other content is displayed. This is different from image retention, a temporary issue that usually fades quickly. Burn-in is a physical degradation of the screen and cannot be reversed. OLED technology works by having each pixel produce its own light through organic materials that glow when an electric current passes through. This allows for perfect black levels but also leads to wear over time. Pixels that are lit brightly and for long periods become less efficient. This uneven wear can lead to burn-in, especially when the same image or element remains on screen for extended periods. There are two main types of OLED panels: WOLED and QD-OLED, with a third option called Tandem architecture. WOLED technology, used by LG Display and others, uses white light filtered into red, green, and blue with an extra white sub-pixel. QD-OLED technology, developed by Samsung Display, uses a blue light source that powers quantum dots to create red and green light. The Tandem architecture stacks multiple light-emitting layers to share the workload, reducing heat and wear. Blue is the weakest part of OLED technology, as its materials are the least efficient and degrade the fastest. Every sub-pixel in an OLED panel includes blue. In WOLED panels, each sub-pixel has the same layers, while in QD-OLED panels, all sub-pixels emit blue light, which is then converted into red or green using quantum dots. In April 2025, LG Display announced a new panel using phosphorescent blue, which could reduce power use by 15% and extend the panel's life. However, this technology is currently limited to small and medium screens like smartphones and tablets, not yet used in OLED televisions in 2026. Television use is generally varied, with content changing frequently, which helps distribute wear across the screen. In contrast, PC monitors often display static elements like taskbars and icons, which can cause faster wear. A test by the Canadian site Rtings ran 102 televisions for nearly three years and found that OLEDs performed better than many LCDs under extreme conditions, although they are not immune to burn-in. Manufacturers have introduced several countermeasures, including software features like pixel shift, logo detection, brightness limiters, and compensation cycles. More advanced panels with better heat dissipation and Tandem architecture are also being developed. Some manufacturers now offer up to four years of warranty coverage for burn-in on monitors. To enjoy OLED screens without worrying about burn-in, users should keep the built-in protections active, avoid using "Vivid" or "Dynamic" modes, lower brightness, and keep the device updated. For those watching news or sports, varying the content and avoiding leaving the screen on in the background is recommended. Gamers should reduce interface opacity and enable automatic sleep, while office workers should hide taskbars, use dark modes, and set quick screen sleep. If OLED is not suitable, alternatives like Mini-LED televisions or IPS monitors are better choices, as they do not suffer from permanent burn-in. If burn-in occurs, users should check if it's just image retention and use compensation cycles. If the issue persists, they should photograph the screen on a gray calibration chart and contact the manufacturer or retailer. Burn-in will not disappear as long as OLED technology uses organic materials, but it has become a manageable risk. For televisions with varied content, OLED remains a good option. For monitors used in office work, the length of the burn-in warranty can be an important factor in purchasing decisions. Future advancements in Tandem panels, phosphorescent blue for larger screens, and eventually Micro LED technology may offer better solutions.