The current technical status of OLED is described, and the passive driving mode of OLED is described in combination with the design of experimental OLED display driving circuit. Keywords: organic light-emitting diode; passive drive; active drive At present, in the field of optoelectronic display, CRT has come to an end, and LCD is at the peak of development. Compared with the LCD industry with mature technology, perfect industrial chain and large scale, OLED is still in the early stage of development. Its advantages can be seen from both technical and industrial aspects. In terms of technology: OLED is very thin and light, and its thickness can be thinner than LCD; because it does not require active light from the backlight, OLED has a wide viewing angle, which is generally considered to be close to 180 degrees; and it has the characteristics of power saving and low temperature resistance, and its performance at low temperatures is far better than LCD; fast response speed, the image refresh rate is almost 100 to 1000 times that of LCD; in addition to the fundamental improvement of image quality, it also has the characteristic of good shock resistance, which is very beneficial for portable devices; not only that, because bendable plastic can also be used as a matrix material, the shape of the OLED display is not restricted, it can be any shape, and can be placed on the surface of any object. Due to the use of new matrix materials, OLED displays are much flatter than the thinnest thin-film transistor (TFT) screens currently available. However, the above advantages have not been fully demonstrated in the electronic products currently on the market that use OLED. Many products choose OLED not because of the above advantages, but simply because they think it has high clarity and bright colors; OLED and LCD will have a long-term coexistence stage, but as these advantages of OLED are gradually realized, OLED will be able to challenge LCD in the future. In the industry: Compared with the hundreds of millions of dollars of investment in TFT-LCD, the investment in OLED is relatively much less, and it has more advantages in cost. Due to its outstanding performance advantages, OLED is very popular in the market, and from the current situation, it has been on an upward trend.
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