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LED backlight module application grows fast in notebook computers
Since the second half of 2007, laptop panels have used white LEDs as backlights to gradually heat up. The advantages of using white LEDs as light sources are thinner, lighter weight, and lower power consumption, which can enhance laptops. Sexual convenience. In addition, environmental issues are another focus. Consumers' concern about environmental issues has become a backlight for notebook computer brands who are actively introducing mercury-free LEDs. In particular, Apple Electric announced in May 2007 that notebooks that have not come home will use LEDs as backlights and start to drive notebooks. Computer manufacturers adopt the trend of LED backlight technology. Therefore, the glare of white LED applications in notebook panels will continue to burn.
Panel factory actively develops notebook panel with LED backlight module
At present, panel manufacturers using white LEDs as backlights for notebook computers are most active with TMD. Therefore, most of the notebook panels using LED backlights before the first half of 2007 are panels from TMD. South Korea's two panel makers Samsung Electronics and LG.Philips LCD and Taiwan's AU Optronics (AUO) and Chi Mei Optoelectronics (CMO) also launched LED-backlit notebook panels in the second half of 2007, actively occupying this market.
Technical challenges for LED backlight modules for notebook computers
However, notebook panels with white LEDs as backlights still have to face many difficulties that must be overcome. The source of white LEDs for laptops is currently dominated by Toyota Synthetic (Toyoda Gosei) and Nichia (Nichia), with life and patent issues being the main factors contributing to supply constraints. Therefore, the supply source is limited, resulting in the shortage of LEDs for notebook computers, and the price remains relatively high, which makes the cost decline limited.
Secondly, the Light Guide Plate of the LED backlight module is also one of the technical bottlenecks. The thickness of the light guide plate of the CCFL backlight module is between 1.6 mm and 2.2 mm, and the thickness of the light guide plate of the LED backlight module is reduced to between 0.6 mm and 0.8 mm, so how to maintain the guide of the light guide plate in such a thin light guide plate Light function and uniformity are the bottlenecks of technology.
In addition, notebook panels using LED backlights are often required to be thinner glass substrates for thinner purposes, so it is also necessary to increase the thinning process of the glass, resulting in an increase in cost. In the color filter combination, because the spectrum of LED and CCFL is different, the color filter must also be modified to a certain extent to achieve better color rendering. The difficulties of these technologies will lead to an increase in the cost of LED-backlit notebook panels.
LED backlight module for notebook computer
The larger the size of the LCD panel, the more LED particles are needed, but as the LED brightness and technology improve, the cost reduction is helpful, and the number of particles used may be reduced in the future.
Differences between laptop panels with LED backlighting and CCFL
White LED price trends for laptops
In terms of price trends, since the white LED suppliers for notebook computers are still dominated by Toyoda Gosei and Nichia, the number of suppliers is limited, so the unit price is still around $0.2. As the proportion of LED backlights in notebook computers is gradually increasing, the demand for white LEDs for notebook computers is expected to continue to increase. Therefore, white LEDs for notebook computers will be in short supply and prices will continue to be maintained.
Mainstream white LED specifications and prices
Development of LED application in notebook panel backlight module
By DP Liu , Witsview