Mitsubishi Electric debuts plans to release a Laser Backlight LCD TV in Japan later this year. Its backlight unit includes red laser diodes and cyan LEDs. Compared with Mitsubishi Electric’s existing LCD TVs, which use white LEDs for backlight, the color gamut of the new TV is about 1.3 times wider. It is a 126% color gamut on NTSC standards. The color red is realized by the laser light source and the colors green and blue are realized by the cyan LEDs.
The backlight of the prototyped 46-inch LCD TV is the edge-lit type. It uses a few dozen of the red laser diodes and several hundred of the cyan LED. Because of the divergent angles between a laser and an LED, Mitsubishi Electric developed an optical system for evenly mixing lights from them. As a result, the unevenness of color was mitigated, the company said.
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