As light-emitting diodes (LEDs) gradually replace cold cathode fluorescent bulbs (CCFLs), they are the main source of backlight technology for flat panel displays and notebook computer (NB) liquid crystal screens (LCDs); LEDs with environmental protection, long life and low power consumption are positive. Detonating huge green business opportunities and attracting many manufacturers to actively attack LED backlights. Especially for LED-backlit notebook applications, O2Micro with years of experience and technology in backlight and power management provides a series of implementations. Innovative LED driver for high image quality and uniformity.
According to iSuppli's statistics, in 2009, about 105 million TFT LCD panels will use LED as backlight technology, and the market demand for LEDs will have a market size of 163 million US dollars. It is expected that this number will increase by 9 times in 2012. , reaching a level of $1.4 billion. iSuppli also expects the penetration of LED backlight technology to increase from 3% in 2009 to approximately 39% in 2013. In addition, DisplaySearch's data is expected to be more than 50% of large-size TFT LCDs in 2012 (10-inch terpene and all notebooks will switch to LED backlight technology.
O2Micro's intelligent lighting department executive deputy Lin Yonglin also quoted relevant statistics and pointed out that the current penetration rate of LED backlight applications in notebook computers has reached 50%, and it is estimated that 70% to 90% of the proportion in the third quarter of this year; The industry's emphasis on environmental protection, and this green energy awareness has been recognized in the consumer side. Therefore, turning the traditional CCFL backlight used in large-size LCD into LED backlight is exactly what we are optimistic about now.
LED backlight technology is also becoming more and more popular in high-end notebook computers; especially in response to the relatively high requirements of multimedia functions in notebook computers, image quality has become a key performance. However, there are certain technical difficulties in developing green LED NB. Lin Yonglin pointed out that developers often face multi-string LED current sharing, audible noise caused by LED linear dimming, power dissipation, and manufacturers' requirements for different protection specifications.
To help developers overcome these challenges, O2Micro has released a series of LED drivers with high-speed pulse width modulation (PWM). Designed to allow LCD backlights to operate over a high frequency range, the switch uses fast switching modes, burst mode and phase-shift technology, as well as proprietary area illumination. Techniques such as (Area Lighting) effectively eliminate noise and improve the picture quality and contrast of the display, making the notebook display consistent and higher quality images.
For example, O2Micro's OZ9960 for 6 and 7? muscles, 11.6? men's "netbook" and the OZ9989 and 4-channel LED driver ICs to be launched in the third quarter; OZ9956B, OZ9959B, OZ9955A for notebook computers /B, and two new 6-channel products to be released; and a variety of products including 1, 3, 4, 6, and 8 different channels for PND, LED TV, and monitor applications.
At present, many major NB manufacturers in the market have chosen O2Micro's LED backlight driver for their high-end notebooks. Lin Yonglin pointed out that the company's biggest advantage is that it can provide LED driver products with different configurations, such as 3x9/4x7/4x8/6x10/8x8/8x9, according to different specifications of customers, so it can cover most application requirements in the market.
Lin Yonglin is quite optimistic about the development prospects of LED backlights. He said, "As the performance of LED chips continues to increase, the penetration of LED backlights in notebook computers and other market segments will become higher and higher after the cost is gradually reduced in the future; therefore, Depending on the needs and decisions of the consumer market, LED backlights will completely replace CCFL as the main LCD backlight technology will be just around the corner."
(Edit: Sandwich)
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