Delta Introduces New Energy-Saving LED Backlight

TAIPEI, Taiwan - Delta Electronics Inc. has developed an advanced energy-saving LED backlight module (BLM) that it demonstrated at the Flat Panel Display (FPD) exhibition in Japan from October 24-26. This advanced optical product allows LEDs to achieve a maximum homogeneous illumination, the company said. The LED BLM features good heat dissipation performance, a wide gamut range, and a reduced number of LEDs, according to Delta.

In addition to exhibiting 32-, 40-, and 42-in. LED BLMs, Delta is also demonstrating LED lighting for indoor use, which includes standing, reading, and wall lamps, all based on the same technology. This signals Delta's entrance into the general LED lighting market.

"Delta is pleased to cooperate with the Industrial Technology Research Institute (ITRI) . We have a solid foundation in the fields of BLM, key components, and lighting," Roland Chiang, director of the CPBG Advanced Lighting Business Department at Delta Electronics, said in a press statement. "Our cooperation with the Material and Chemical Research Laboratories of ITRI has provided a number of patents which apply to lighting. This cooperation has added the new LED BLM product to Delta's green energy product roadmap and has furthered Delta's mission in the promotion of energy-saving and environmental protection."

LED BLM technology can be applied to many products, ranging from small cellular phones, to large outdoor exhibition boards, as well as lighting for both interior and exterior applications, Delta said. LED BLM technology has the advantages of high power efficiency, good performance in thermal dissipation, and substantial reduction of power consumption. In addition, Delta has design-in capabilities for both hybrid LED BLMs and full LED BLMs for TFT-LCD TVs. Compared to traditional CCFL BLMs, hybrid LED BLMs have advantages in increasing red light purity and brightness by mixing cyan CCFLs with red LEDs, increasing the NTSC gamut by 5% and contrast ratio by 44%, and decreasing loss of light due to LCD panel color filter. The advantages of full LED BLMs include the triangular arrangement built on the PCB, which greatly reduces the number of LEDs used by 10%. Other advantages include brightness uniformity of 90%, an NTSC gamut of 100%, and a contrast ratio of 2042 (in comparison with 81% of brightness uniformity, an NTSC gamut of 69%, and 1000 contrast ratio for traditional CCFL BLMs).

Delta said its general LED lighting uses 4-wavelength mixed LEDs to increase color rendering index and achieve luminance uniformity.