The display screen of an OLED e-book reader is composed of a series of organic compound layers, including a light-emitting layer, an electroluminescent layer, and a substrate. Because organic materials are greatly affected by environmental factors such as temperature and light, there are certain problems in the brightness and color of the display screen.

First of all, the display screen of an OLED e-book reader generally has the problem of brightness attenuation. This is because the organic compound layer is affected by many factors such as time, environment, and frequency of use. Some of the components may degrade during use, resulting in a gradual decrease in the overall brightness of the display. In this regard, manufacturers generally take targeted measures, such as screening during manufacturer testing, optimizing the internal structure of the product, adding light compensation, etc., to prolong the life and stability of the display as much as possible.

Secondly, the color change problem of the display screen of OLED e-book readers is also relatively common. This is because organic materials are sensitive to environmental factors such as temperature and humidity. These environmental factors will affect the molecular structure of organic compound pigments, resulting in subtle changes in the display of certain colors. In order to avoid this phenomenon, manufacturers often use program algorithms, electronic device synchronization, temperature control and other means to reduce color changes as much as possible and improve the color reproduction of the display.

In addition, the display of OLED e-book readers may also have problems such as flickering screens. Due to the temperature limitation of the electroluminescent layer of the display screen, there will be a short flicker phenomenon when switching content frequently. However, this flickering phenomenon usually does not have a great impact on reading, and the manufacturer will try to reduce the flickering as much as possible to improve the user experience.

To sum up, the display screen of the OLED e-book reader has some problems such as brightness attenuation, color change and flickering. However, for most users, these problems will not have too much impact on reading. At the same time, manufacturers will try their best to improve, optimize and control to improve product quality and user experience.