Organic light-emitting diode (OLED) display is a display device that uses organic light-emitting diode technology.
OLED, the full name of Organic Light-Emitting Diode, is a current-type organic light-emitting device. Its working principle is mainly based on the luminescence phenomenon caused by the carrier injection and recombination of organic semiconductor materials and luminescent materials under electric field drive.
Specifically, the working process of OLED display includes the injection, transmission, recombination of electrons and holes, and the de-excitation luminescence of excitons.
Characteristics of OLED display
1. Self-luminescence: OLED is a self-luminous display without backlight and liquid crystal. Each pixel can emit light independently, so it has excellent color saturation, contrast and response speed.
2. Thin and light: Since OLED is made of organic materials, its material is thinner and lighter, and it can realize a variety of designs, such as bendable and foldable displays.
3. High contrast: OLED display can completely turn off pixels when black, making black deeper, thus providing very high contrast.
4. Wide viewing angle: OLED display has a wide viewing angle of 178 degrees, and the screen can be viewed from any angle without color distortion or brightness reduction.
5. Fast response: OLED displays have a very fast response speed, which is suitable for games and videos, and can reduce motion blur and smearing.
6. Low energy consumption: OLED displays only work when they need to emit light, so they have low energy consumption.
Types of OLED displays
OLED displays can be divided into small molecule OLED and polymer OLED (also known as PLED) according to the different luminescent materials. In addition, according to different driving methods, OLED can also be divided into active drive (active drive) and passive drive (passive drive). Active drive applies current to the selected cathode and anode strips through an external circuit to control the light emission of pixels; while passive drive controls the light emission of pixels through a thin film transistor (TFT) array.
Application of OLED displays
Due to the above advantages, OLED displays have been widely used in various electronic devices, such as smartphones, tablets, TVs, wearable devices, etc. With the continuous advancement of technology and the reduction of costs, OLED displays are expected to be applied and promoted in more fields.
In summary, the organic light-emitting diode (OLED) display is a display device with the advantages of self-luminescence, light weight, high contrast, wide viewing angle, fast response and low energy consumption. Its unique light-emitting principle and diversified design make it occupy an important position in future display technology.