Backlight module: manufacturers actively promote LED technology led the future

LED (light-emitting diode) TV continues to launch, set off a wave of LED backlight, the brand manufacturers in the second half of this year have launched a new product. Leading brand TV manufacturers such as Samsung, LG, SHARP and PHILPS, plans to start mass production in 2010, LCD TV with LED backlight, predictable LCD TV will be the main market growth stage of LED backlight, LED backlight technology will dominate the future LCD TV market.

Cost is still the main problem of LED backlight

With the LCD TV brand manufacturers to actively introduce the use of LED backlight products, the recent rapid growth of the LED Backlight Market and become TFT-LCD (thin film transistor LCD) industry highlights. DisplaySearch latest survey data show that in 2009 the proportion of LED backlight LCD TV is 3%, by 2013 will grow rapidly to 40%, is expected in 2014 will have the opportunity to more than CCFL (cold cathode fluorescent lamp) backlight shipments.

A series of reports on LCD matching capability and backlight module

LED TV penetration forecast

LED penetration forecast for various panel products

If you go from CRT to LCD is a milestone in the TV screen, then use the LED backlight module to replace the CCFL module, the birth of the LED backlight TV, LCD TV will be another new generation of products. Due to the price of LED TV than the existing LCD TV is higher than 60%, experts believe that in the case of high cost and part of the components can only be supplied by a small number of manufacturers, a short time to be really difficult volume.

To display products, the cost is still the main problem of LED backlight. Experts said that from the current application point of view, side light guide technology can save LED usage, it will reduce the cost accordingly. The side light type backlight technology is that the LED light source is arranged on 4 sides, and the white light is evenly distributed on the liquid crystal panel by the light guide plate, and the utility model can reduce the usage of LED and reduce the production cost.

Liu Weidong, chief engineer of Hisense electric Limited by Share Ltd, said that the side of the light side of the LED backlight will replace all other ways to occupy the absolute dominance of the view is one-sided. Analysis of direct type LED backlight light guide side, between the CCFL and the evolution of competition, Liu Weidong believes that the future will show the following trends: the first is the direct type to occupy the high-end LED, and the side of the light guide to occupy the low-end LED, then gradually replace the CCFL side of the light guide and direct type backlight, and gradually replace the side of the light guide.

Backlight module technology to enhance the space

We know that the liquid crystal itself is not luminous, all need a light source to make it shine. Any kind of light source, whether it is CCFL or LED, need a light guide plate, and other auxiliary materials. The backlight module is composed of a light source, a light guide plate, a reflecting plate, a diffusion plate and a light adding film. The main function of the optical film is to condense the light and improve the brightness. Optical film is mainly brightening film, the current concentration of technology is still very high, the United States 3M company has a number of patents brightening film, its products accounted for about 75% of the global market. In addition, Japan can also produce similar ensequence brightness enhancement film, but poor quality. Brightening film can be said to be the make-up of the backlight module. 3M (Chinese) optical big screen business development manager Du Guanglei said in an Chinese "electronic newspaper" interview with reporters, the LCD diaphragm, the major manufacturers are trying to manufacture optical gain and more integrated membrane products. With the LED is not still need to use the backlight structure now? "3M has developed a backlight system that doesn't need a light guide plate, or a diaphragm, or even both. LED to the LCD display is just beginning to change, then we will wait and see the development. "Blocking optitek said.

Liquid crystal display technology has never been a perfect technology, so it is because each of its components have great room for improvement and potential. Du Guanglei said: "now the hottest topic of energy, for example, through the panel, diaphragm, light source and power supply can improve the energy efficiency of liquid crystal devices. Diaphragm manufacturers not only in dozens of peers and wrestling, but also by other parts of the challenge. In this competition, the long-term survival of enterprises will develop their own technology. 3M is such a business, we will be 10% of the annual revenue into product development, and its results not only to the company to return, but also directly or indirectly to the upstream and downstream enterprises. "Blocking optitek said.

Upstream and downstream linkage to promote new backlight technology

At present, the domestic LCD upstream supporting the factory is not particularly large, if the new liquid crystal production line to build, we must build a new upstream supporting factories to ensure supply, reduce costs. BOE Technology Group Vice President of the Central Academy of Sciences Wang Gang said.

The development for the domestic backlight Wang Gang suggestions: first, to technology development, follow not technology, not to do product processors, designers, product developers. Second, we must do a good job of market positioning, the development of new products for the domestic market, new technology. At the same time to ensure the domestic market share, to expand the international market.

Du Guanglei believes that with the technological progress of domestic panel manufacturing, product localization rate will be higher, in its implementation of lower cost, shorter supply time, should establish the eco industrial chain, promote the development of local China upstream industry chain. "In foreign countries, we have close cooperation with upstream and downstream enterprises