Organic electroluminescent (EL) as early as 1936 for the first time found by the Destria Ph.D., is a technology has been 60 years, until recent years due to solid-state chemistry and thin film semiconductor technology, EL flat-panel displays gradually be taken seriously. EL light-emitting material to follow is divided into two kinds of organic and inorganic, in the past mostly inorganic research-based. Currently, light-emitting materials to achieve a breakthrough in life after the operation, has reached industrial value. EL can be applied to cause word processors, personal computers, and other OA equipment, and vehicle navigation terminals with a variety of purposes. In addition, EL displays full-color technology has reached practical level, in the near future, the desire to enhance the high-precision, full-color EL displays.
 
 
What is cold

     Electrical excitation (Electro Luminescent) referred to as the EL, it is a phenomenon of electrical energy into light energy, but because the operation of the process will not heat, it is generally known as "cold." Cold light technology involves a complex solid-state chemistry, materials science, vacuum plating (Ion sputtering, ion sputtering), the combination of motor, etc., and because the needs of the manufacturing process, it is also a labor-intensive industries. In addition to general purpose cold outside, this technology also combines semiconductor technology towards luminescent display development, vision, we can replace the CRT and TFT; such as the thickness of 40-inch color TV is only 2 cm, weight of 2 .5 kg, no radiation pollution, non-reflective questions. In Taiwan there are six or seven years of production history, the early cold wet product comparison intolerance and anti-voltage is not good, how long it will play with no spots or black. But two or three years through the continuous development and improvement in the industry, quality has been able to reach the market demand. United States, Japan and other countries have to produce full-color screen with a dot-like cold plates, instrument panels used in the machine or computer, the TV screen.
 
  
 The advantages of cold
1 good stability 6 has a thickness of very thin and elastic flexion of 11 can drive power conditions specified
(2) low temperature light is not affected 7 lightweight, many colors to choose from 12 light-emitting surface of the printed text pattern
3, when almost no heat lamps 8 low power consumption, no significant interference of electromagnetic radiation and 13 products are not subject to vibration or shock impact on life
4 soft and uniform light-emitting area and 9. Can be customized with the construction needs of any size or punching 14 quality effects from voltage instability
5 no viewing angle limits 10. To meet the need to specify the location and style terminal 15 of voltage change in color does not affect the light

EL sheet applications
 
1. LCD backlight for use in a variety of calculators, notebook computers, handheld computers, telephones, remote control, electronic diaries, electronic dictionaries, audio equipment, fax machines, copiers, cash registers, electronic scales, appliances, instruments and so on.
2. Military aircraft and aerospace industry, tanks, submarines, the meter display and interior lighting, marking the helicopter landing at night, night drop target display, night military identification marking, and labeling the aviation industry of a variety of other purposes.
3. Automotive instrument panels, door alarm, number plates, third brake lights.
4. Emergency signs marking, signs, numbers, import and export mark, marked construction, traffic, safety displays, road separation and so on.
5. Advertising bus, train inside and outside advertising advertising box on the table advertising racks, restaurant menus.
6. Construction and interior decoration elevators, stairs, switch of the normal or emergency lighting, decorative lighting; and wall lamps, table lamps, walkway lights.