Organic light-emitting diodes ( OLED screen) is based on a new type of mobile phone display OLED screen comprehensive analysis, because of its high contrast, thin thickness, fast response, flexibility and other advantages, is considered to be the next generation of flat panel display new application technology panel, wide temperature range, simple process. Therefore, many manufacturers ian the world have invested in research and development. At present, there are 38 OLED screen mobile phones in the Chinese mobile phone market [10 monochrome OLED screens, 15 regional colors model, 256 models of 8 colors, 3 models of full-color mobile phones]. As far as I know, at present, domestic mobile phone design companies are developing 7 OLED screen mobile phones. In addition, a certain product and an international brand product were added.
It is estimated that by the end of this year, there will be 50 OLED screen mobile phones in the Chinese mobile phone market, which will be very popular in the Chinese mobile phone market. At the same time, comprehensive data shows that OLED screens are expected to compete with STN-LCD and TFT-LCD technologies in the future. Here, we will introduce the relevant knowledge of OLED. The principle of OLED screen is similar to LED. Negative bias and negative bias are generated from the light-emitting layer and the light-emitting layer, respectively. The anode ITO conductive film, the cathode contains mg, Li and other metals. Its basic structure is shown below. The color of the OLED screen depends on the material of the organic light-emitting layer, so manufacturers can get the desired color by changing the material of the light-emitting layer.
It can also be understood that the main principle of light emission is the combination of electrons and holes to produce light. Depending on the material, the energy levels of electrons and holes are also different, resulting in different wavelengths of light. OLED screen is a self-illuminating material that does not require backlight. At the same time, it has the advantages of wide viewing angle, uniform picture quality, fast reaction speed, easy coloring, and simple manufacturing process. It can be made into a curved panel, which conforms to the principle of light and short. However, due to the high driving voltage of OLEDs, OLEDs are very energy-efficient. However, because PLED does not need to go through the thin-film process and expensive vacuum devices, the module structure has only two layers, so the investment cost is much lower than that of OLED screen. However, since the color performance of PLED is not as good as that of OLED screens, the subtraction constant of each color is different, so the color difference must be compensated. At the same time, the bandwidth is large, the luminous color is not easy to adjust, and the product life is also short. At present, PLED is mainly used for large-size panels. From the perspective of OLED, it is necessary to develop a large number of OLED products with high unit price and low market value.