LED backlight module into the design of low-cost innovation to survive

Backlight is one of the most important components of TFT-LCD (thin film transistor liquid crystal display), which has become the focus of industry because of its advantages such as low energy consumption, high quality, long life and environmental protection. Since 2004, Sony launched the first LED backlight LCD TV, LED device technology, performance continues to improve, a variety of domestic and international research and development of LED backlight technology has been fully developed, and continue to move forward. At present, mobile intelligent terminal application in small and medium size panels basically have all used LED as a backlight source, with light efficiency and price problems solved, a large number of LED light source has been installed into the large-size backlight module, its mainstream position has tended to be stable. With the LED used, more and more technologies such as dynamic backlight control technology, ultra-thin technology, cooling technology is applied to the backlight module and the backlight module industry gradually changed the previous Labour intensive, with the added value of technology more and more, in the industrial chain is more and more obvious.

LED backlight module determines the success or failure of the panel

The backlight module determines the power consumption of the whole TV, the cost of the TFT-LCD panel and the user's experience of the terminal display.

The backlight module is one of the key components of the LCD panel, its importance is mainly reflected in three aspects: first, the backlight module determines the power consumption of the TV set. Because the TFT-LCD panel is to change the alignment direction of the liquid crystal molecules by the electric field, the power consumption is very low. The power consumption of TFT-LCD is mainly composed of three parts: TFT circuit, drive circuit and backlight module. The backlight module occupied TFT-LCD power consumption of 80%, while the power consumption of the TFT-LCD panel for LCD TV 80%, it can be seen that the backlight module occupy the highest share in the overall power consumption of LCD TV.

Two backlight module determines the cost of the TFT-LCD panel. The backlight module is composed of three parts: LED light source, light guide plate, optical film, which accounts for 72% of the cost of the backlight module. Light source is the lamp, light guide plate is the role of the light source into a surface light source, the main role of the optical film is the condensation of light, improve brightness. One of the most expensive optical film, accounting for 44% of the cost of the backlight module, light guide plate accounted for 16%, lamp accounted for 12%, the other, such as shade, outer frame, accounting for about 28%. More than 70% of the cost of the TFT-LCD panel module is raw material, and the backlight module accounts for 20%~30% of the panel module cost. Therefore, the backlight module occupies the highest share in the cost structure of TFT-LCD.

Three is the quality of the backlight module determines the basic user experience for the terminal display. The demand for the display effect is gradually improved, and the requirements of wide viewing angle, low power consumption, faster response speed, richer color expression and so on have become the key factors to determine the advantages and disadvantages of backlight module.

Low cost into an important design direction

In the short term, LED backlight tends to saturation. In order to stimulate the penetration of the product, many manufacturers will design to low cost direction.

The future development trend of LED backlight module can be summarized as follows: first, LED backlight will become the mainstream of the backlight market. LED backlight is a powerful alternative to CCFL, with the maturity of LED technology and the continuous decline in cost, the application rate of LED backlight module in LCD is increasing year by year. 2009, LED backlight LCD TV global penetration of less than 1%. According to market research firm IDC data show that in 2012, the global LED backlight TV penetration rate has reached 73%, is expected in 2013 shipments penetration will reach 86%. These data indicate that the LED backlight module has become a standard LCD TV configuration, the market trend is irresistible.

Two is a low-cost LED backlight will further become the focus of market attention. LED backlight has been widely used in the 1 to 70 inch LCD monitor, and LED chip prices have been an important factor hindering the further popularization of LED backlight. With more manufacturers involved in LED backlight technology R & D and MOCVD localization brought about by the decline in the cost of LED chips, the future of the LED backlight module production costs will be reduced to some extent. At present, in order to stimulate the improvement of LED backlight product penetration, many manufacturers will be designed to low cost direction.

Three is a side emitting backlight and low-power technology will be more favored by the industry. Now the mass production of large size TV products are generally used under direct CCFL as a light source, not only a relatively large power consumption, technology development has been close to the theoretical limit. Side emitting LED large backlight technology, a set of ultra-thin, beautiful in one, and regional control technology integration, can greatly reduce the power consumption of the backlight.

Four is the panel, the whole machine is expected to extend the industrial chain of backlight modules. There are indications that, with the increasing size of the panel plant, they want to invest or acquire backlight module manufacturers to grasp the supply capacity. While the lower threshold of the TV backlight module is often the preferred entry panel factory. Overall, TV machine factory and LCD panel factory is a big demand for back light source, with the declining cost of LED chips, panel and machine manufacturers will have the ability to extend the industrial chain link back light module. For the whole enterprise, due to the increasingly fierce competition in the LCD industry in recent years, enterprises only continue to increase the intensity of vertical integration, in order to effectively solve and international manufacturers compete for key raw materials, reduce