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OLED display screen structure and its characteristics
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OLED display screen is an application of the OEL display technology, in the past ten years, more and more research strength into OLED technology research and development, the structure of OLED display and OLED display technology is increasingly mature. At present, the OLED display in People's Daily life play an irreplaceable role. Based on the wide application of OLED display, this chapter on the characteristics of OLED display screen structure and make a brief analysis.
To image that OLED display screen structure, can be per unit as a hamburger, OLED luminescence materials is caught in the middle of vegetables. Each of the OLED display unit can be controlled to produce three different colors of light. As the OLED and LCD, is divided into active and passive. Passive mode by address selected unit is lit. Active mode, OLED unit after a thin film transistor (TFT), light emitting unit under the TFT driving light. Active OLED compare save electricity, but passive OLED display performance is better.
OLED display screen is composed of the following sections:
At the grass-roots level (transparent plastic, glass, metal foil) - base used to support the OLED.
Anode anode when current flows through the device (transparent) - electronic (increase electron hole).
Organic layer, layer composed of organic molecules or organic polymer.
Conductive layer - this layer consists of plastic organic molecules, these molecules transport from anode hole. Polyaniline can be used as conductive polymer OLED.
By the organic emission layer - the layer of plastic molecules (unlike the conductive layer), these molecular electron transfer from the cathode; Luminescence process in this layer. Get fluorene as emission layer of polymer can be used.
The cathode (can be transparent, opaque, depending on the type of OLED) - when equipment in current circulation, cathode electron injection circuit.
The characteristics of the OLED display
OLED, namely Organic Light Emitting Diode (Organic Light - Emitting Diode), also known as Organic laser Display (Organic Electroluminesence Display, OELD). Because has the character of thin, save electricity, from 2003 onwards, the display device has been widely applied in the MP3 player, and belong to the DC digital products and mobile phones, had previously only on some exhibition showcased the OLED screen engineering sample, also did not walk into practical application stage. But have a lot of OLED screen LCD incomparable advantages, so it has been in the industry are also look good.
OLED for spontaneous light material, don't need to the back plate, wide Angle at the same time, uniform quality, quick response speed, color, use simple drive circuit can be more easily to glow, simple process and can be made into flexure type panel, conform to the principle of thin and short, application scope belong to small and medium size panel.
Display aspects: active luminous, wider range of perspectives; Fast response speed, image stabilization; High brightness, colorful, high resolution.
Working conditions: low driving voltage, low energy consumption, can match with the solar cell, integrated circuits, etc.
Wide adaptability, the glass substrate can achieve large flat-panel display; Such as make substrate with flexible material, can make foldable display. Because OLED are all solid state, the vacuum device, shock resistance, resistance to low temperature 40 ℃ (-), and other characteristics, has very important application in military aspects, such as used as modern weapons such as tanks, aircraft display terminal.
OLED display technology and the traditional LCD display in a different way, no need backlight, with very thin organic materials coating and glass substrates, when a current through the organic material will glow. And OLED display screen can do much lighter, more visual Angle, and can significantly save electricity.
Currently in OLED technology of two system, low molecular OLED technology for Japan to master, and polymer PLEDLG phones so-called OEL is the system, technology and patent, by the British company CDT master of science and technology, both PLED products compared to the colorization of remains difficult. While low molecular OLED color more easily.
But while technology better in the future OLED will replace such as TFT LCD, but organic light-emitting display technology there are defects such as short service life, large screen difficult.
conclusion
OLED display screen structure and its characteristics, can know OLED display is composed of thin solid state devices, organic molecules exert power after can shine. OLED electronics produce more bright, can have a clearer image, its power consumption is less than the traditional traditional LED display.
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