Introduction of LED and organic EL to replace the existing technology of new light source backlight technology

[BP] the Nikkei news agency reported in October 24th to 26 held the "FPD International 2007" on the back light seminar held, the meeting aims to replace the existing LED technology and the latest technology of organic EL back light published continuously. SONY introduced a large color gamut LED backlight technology SONY's Kinuma Xiaoichiro on the advantages and future development of LED backlight delivered a speech. LCD TV kakinuma compares SONY published in 2004 (QUALIA) used in LED backlight (first used for global) in 2007 and released 70 inch LCD TV (BRAVIA) using LED backlight technology, introduces the advantages of LED back light. Kinuma stressed that it is generally believed that the high purity of LED light source, can get a large color gamut, in order to give full play to this feature, you need to choose a suitable color filter". By choosing the appropriate color filters, QUALIA and BRAVIA achieve a large gamut of NTSC above 105% (CIExy). QUALIA LED backlight is installed above the light source called the divertor plate (Divertor Plate) "to solve the problem and the screen bright spot, BRAVIA LED back illuminated light through the lens alignment characteristics improved light, eliminating the target plate. During the period from 2004 to 2007, the luminous efficiency of the light source was increased to about 1.6 times, and the light utilization efficiency of the light source was increased to about 1.3 times. Therefore, in accordance with the 46 inch conversion, power consumption dropped to less than half. Kinuma said that in addition to the color of the future in the future, LED backlight is likely to support large dynamic range, energy saving Dimming (Local) and xvYCC become the main components. However, in order to achieve this goal, LED also need to further achieve high efficiency and low cost". The technology strategy of northeast white organic EL element of horses and flat white EL backlight speech. Introduced the company's current production of white organic EL backlight. The element structure of backlight for bottom emitting type film by vacuum evaporation. The luminescent layer is a low molecular fluorescent material. Brightness up to 1000cd/m2, life of 20 thousand hours or more. Can adjust the brightness by controlling the current. In addition, the company made use of thin film backplane flexible back light has also been successful. In addition, horses also cited several characteristics of organic EL back light: the multilayer light emitting layer, easy to realize multi wavelength; by adjusting the film thickness control white point. At present, the organic EL backlight mostly use fluorescent material, luminous efficiency and incandescent lamp is equivalent, in the future through the use of phosphorescent materials, to achieve high efficiency. In addition, will strive to achieve three wavelength, 4000cd/m2 high brightness, about 11 inches large". At the same time, it also introduced the use of white organic EL is a surface light source of the characteristics of indoor and refrigerator lighting applications. In addition, a 1.5 inch and 2.8 inch White Organic EL backlight was demonstrated at the workshop. Backlight light is very uniform, the brightness of 1000cd/m2.