Organic luminescent display.p6 waterproof rental cabinet

　　The English abbreviation OLED refers to Organic Light Emitting Diodes, sometimes also referring to organic light emitting displays. In Asia, the abbreviation OEL (Organic Electroluminescence) is often used to represent organic electroluminescence, but the two processes are actually the same.

　　According to the different organic luminescent materials used, OLEDs can be divided into two categories, namely small molecule organic light-emitting diodes (SMOLEDs) and polymer light-emitting displays (PLEDs). The former is an OLED made from organic electroluminescent films invented by Kodak, while the latter is a polymer based OLED, also known as LEP (Light Emitting Polymer), developed by Cambridge Display Technology Company CDT.

　　The typical structure of small molecule OLEDs is shown in Figure 4, with an organic luminescent layer sandwiched between a metal cathode and a glass anode coated with a transparent conductive film. The entire organic luminescent layer consists of a hole injection layer, a hole transport layer, an emission layer, and an electron transport layer. When a suitable voltage (typically between 2-10 volts) is applied to the device, the positive and negative charges injected into the emission layer combine to emit light (electroluminescence effect).

　　The OLED process was originally developed by Kodak and Sanyo, which is a combination of Kodak's organic electroluminescence process and Sanyo's Low-temperature polycrystalline silicon TFT process. Unlike traditional LCDs, OLEDs are self luminescent, so there is no need for backlight, diffusers, polarizers, color filters, and alignment materials. Its advantages are: wide viewing angle, high resolution, high brightness, fast response speed, low driving voltage, low power consumption, cheap manufacturing cost, lighter and thinner, etc.

　　It should be said that OLED is the most promising type of display, but it is still in its early stages. Its main drawback is the reliability of color - the color becomes uneven after one month of use. Usually, red and blue fade, leaving a very green display. The general blue lifespan is 1000 hours, the red lifespan is 30000 hours, and the green lifespan is 100000 hours. Although this is sufficient for producing alphanumeric devices like mobile phones, it is still a problem for desktop display. Experts predict that the large-scale production of various OLED based display products will take at least another 4 years.

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