[CEATEC] Mitsubishi Uses Laser Light for LCD TV Backlight

Oct 11, 2011
Tetsuo Nozawa, Nikkei Electronics
Mitsubishi Electric's 55-inch "Laser Backlight TV" (right and center). The far-left TV is a 40-inch LED TV for comparison.
Mitsubishi Electric's 55-inch "Laser Backlight TV" (right and center). The far-left TV is a 40-inch LED TV for comparison.
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Mitsubishi Electric Corp prototyped the "Laser Backlight TV" and exhibited it at CEATEC Japan 2011.

In 2010, the company released the "Laser TV," a 75-inch rear-projection TV that shows laser light on its display by using the DLP (digital light processing) method. However, the Laser Backlight TV is a 55-inch LCD TV, and laser light is used to improve the white light of its backlight.

Specifically, white light is made by using red laser light and LEDs that emit cyan light. Cyan is a color made by mixing green and blue colors. When a red color is added to them, a white color consisting of red, green and blue colors is made.

Compared with a white color made by using only LEDs, the white color made by using red laser light can realize a higher color reproducibility for an LCD display. Especially, the color gamut in the red color direction is expanded by about 30%, Mitsubishi Electric said.

The problem for the Laser Backlight TV is its high cost. And the company did not reveal when it will be commercialized.