Why OLED Screens Are Prone to Burn-Ins: Insights from Limito Technology

The core reason for OLED burn-ins lies in the unique self-luminous working principle of OLED technology. Unlike LCD screens that rely on a backlight module to emit light, each pixel of an OLED screen is an independent organic light-emitting diode, which can emit light on its own when energized. This working mode brings advantages such as high contrast, wide viewing angle and fast response speed, but it also lays the foundation for the occurrence of burn-ins.

The irreversible degradation of organic light-emitting materials is the primary internal cause of burn-ins. The light-emitting layer of OLED pixels is composed of organic compounds, and these materials will gradually degrade under the action of electric field and heat during the light-emitting process, resulting in a permanent decrease in luminous efficiency. What makes the problem more prominent is that the degradation rates of red, green and blue sub-pixels are quite different: the blue organic material degrades 2-3 times faster than red and green materials because it needs higher energy to emit light, which leads to uneven aging of pixels and further exacerbates the risk of burn-ins.

The cumulative effect of static image display is the main external inducement of burn-ins. When an OLED screen displays the same static content for a long time—such as the status bar of a mobile phone, the logo of a TV station, or the fixed buttons of a device—the pixels in the corresponding area will be in a continuous working state, and their aging speed will be significantly faster than that of pixels in dynamic display areas. Over time, the brightness of these over-aged pixels will be significantly lower than that of other areas, leaving permanent ghost images on the screen, which is the typical manifestation of burn-ins.

In addition, factors such as driving current imbalance and imperfect encapsulation technology also contribute to burn-ins. The brightness of OLED pixels is determined by the driving current; long-term fixed current input will lead to unbalanced charge accumulation in the light-emitting layer, accelerating material degradation. At the same time, if there are tiny defects in the screen encapsulation process, moisture and oxygen will enter the interior, react with organic materials, and further speed up pixel aging.

As a pioneer in the custom OLED/TFT display industry, szallvision.com has been committed to reducing the risk of burn-ins through technological innovation. In the R&D and production process, we optimize the formula of organic light-emitting materials, improve the encapsulation process, and adopt intelligent pixel adjustment technology to balance pixel aging, effectively extending the service life of custom OLED displays. Understanding the causes of burn-ins is the first step to solving the problem, and szallvision.com will continue to leverage its technical advantages to provide more reliable and durable custom OLED display solutions for global clients.