Isuppli claims that the new technology has better performance on TV backlighting

According to the discussion of the iSuppliFID2007 meeting, LCD TV manufacturers are trying to make the products become out of the ordinary, and move to a bigger market size panel, and rear projection TV manufacturers are trying to compete with flat-panel TV, both sides are looking for resources to cope with the challenges of advanced backlight.

The cost of LCD panel decreases with the increase in size, but the cost of lighting has not decreased. In fact, as part of the larger size of the TV, the cost of lighting has increased. This is the most concerned about the issue of the panel manufacturers that bear most of the cost of lighting. In addition, panel manufacturers also tend to supply third party lighting manufacturers, which further increases the cost.

At present, most LCD TV use fluorescent lamp light source including lamp tube and a series of optical film. On the plus side, these technologies have advantages in terms of longevity, efficiency and mass production. From the negative aspect, the learning curve of these resources without corresponding Economics (learning-curve), and does not match the requirements of ROHS containing mercury, and has a slow startup time, color gamut is narrow, with the increase of the cost of the display problem.

LCD TV need to improve the image quality to win customers still use CRT or plasma display, and lighting is an important component of the LCD TV market how to break the barriers to application. From a cost point of view, with the LCD prices continue to decline, starting from the largest screen, LCD TV began to save money.

Although the display lighting including fluorescent lamp varieties, new FED (field emission display) technology and OLED technology etc. many techniques available, LED is in the short term is most likely to improve the light LCD TV backlight lighting performance, it can directly replace standard fluorescent lamps, which means to enter in the design change and the market they are the easiest to implement the. In addition, LED color sequence without the use of filters, their ability to accurately control the brightness of the LED to ensure a high dynamic range, which is only used in high-end LCD TV market features. But the use of LED is still facing a problem, which is too high for the mass market price. ISuppli believes that the next few years there will be a significant decline in costs, which will enable the LED to serve the mass market, but the high cost of LED in the near future will limit its application on LCD TV. LED based LCD TV global shipments will rise from 07 in the fourth quarter of 42 thousand to the 08 quarter of fourth units in the 64 thousand quarter.

Source: China Semiconductor Lighting Network