LED backlight Features oled module

The most significant advantages compared to traditional CCFL backlight, led backlight can provide an unprecedented level of color reproduction. By the choice of an appropriate wavelength LED and color film to match the color reproduction range of the LED backlight can reach 105% of the NTSC standard or even 120%. In comparison, the traditional CRT TV only about 85% of the CCFL backlit LCD TV is only 65 to 75%.256x64 oled
Quality is life display industry, with more vivid colors will be overwhelming. In accordance with the terms of the traditional concept of the liquid crystal display, especially LCD TV color and response speed than CRT or PDP was criticized, but once the LED backlight color will overwhelm the major competitors CRT and PDP. In addition, LED backlight can be solved to some extent caused by smearing due to the slow response. LED can instantly start, the response speed of the order of ns is CCFL million times. With the fast response backlight, liquid crystal display device can be instantly backlight blinking technology to eliminate ordinary LCD blur trailing in fast-moving objects, the picture quality will be significantly improved. More importantly, the use of different monochromatic lights LED backlight instantly switch field sequential color can be achieved, so that it can completely remove about 30% of the total cost liquid crystal display color filter.128x32 oled
Service life, LED can reach more than 100,000 hours, best CCFL twice, even eight hours a day watching television, can be spotted more than 30 years. And the CCFL containing Crit mercury vapor type, LED is a semiconductor solid state light sources, and is an ideal green light. EU has comprehensive restrictions on electronic products containing mercury and other harmful elements into July 2006, LED backlight LCD products during this period began to replace the CCFL to the world has created a great opportunity. Cold cathode fluorescent tube high-voltage AC drive complex set of power transformer rectifier, LED required auxiliary optical components can be made very simple, do not need a lot of space, can be made very thin body, alleviate a lot of weight. SONY TX series laptop, for example, and the cold cathode fluorescent tube LCD VAIO T Series, thickness from 9mm down to 4.5mm, a 26% reduction in weight. Mitsubishi Electric released six primary colors SID2005 LED-backlit LCD TV thickness of only 5 cm! In addition, the LED can start quickly in the environment of less than -40 ° C, and CCFL does not work in such an environment, LED-backlit LCD display by the military, aviation, exploration and other fields favor good adaptability to the environment.
Of course, the LED backlight there are some problems. Currently, LED backlight is about 3-5 times the price of similar CCFL backlight. This difference is enough to make the vast majority of manufacturers and users away. Followed by cooling, LED backlight work will be issued when a lot of heat, especially for large-size LCD TV is more serious. So often requires the use of forced cooling measures, such as fan. In addition there is the problem of the luminous efficiency. Highest current commercial LED luminous efficiency of approximately 30-35lm / W, CCFL luminous efficiency of only about one half of the (CCFL light emitting efficiency is about 60-70 lm / W) LED so the need for greater power to to reach and CCFL brightness.