Blue backlight and phosphor layer for a color LCD

Details Blue backlight and phosphor layer for a color LCD Blue backlight and phosphor layer for a color LCD

2005-01-18

2005-01-18

Niebling, John F. (Department: 2812)

Liquid crystal cells, elements and systems

Particular structure

Particular illumination

Reexamination Certificate

active

06844903

ABSTRACT:
A color, transmissive LCD uses a backlight that supplies a uniform blue light to the back of the liquid crystal layer in an LCD. The blue light, after being modulated by the liquid crystal layer, is then incident on the back surface of phosphor material located above the liquid crystal layer. A first phosphor material, when irradiated with the blue light, generates red light for the red pixel areas of the display, and a second phosphor material, when irradiated with the blue light, generates green light for the green pixel areas of the display. No phosphor is deposited over the blue pixel areas.

REFERENCES:
patent: 5608554 (1997-03-01), Do
patent: 6078704 (2000-06-01), Bischel
patent: 6252254 (2001-06-01), Soules et al.
patent: 6501100 (2002-12-01), Srivastava et al.

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