Backlight device and color liquid crystal display apparatus

Details Backlight device and color liquid crystal display apparatus Backlight device and color liquid crystal display apparatus

2005-08-09

2010-02-16

Pak, Sung H (Department: 2874)

Liquid crystal cells, elements and systems

Particular structure

Particular illumination

Reexamination Certificate

active

07663714

ABSTRACT:
Disclosed is a backlight device used for a color liquid crystal display (LCD) apparatus. The red light, green light and blue light, generated by a light source, made up by a red light emitting diode (21R), a green light emitting diode (21G) and a blue light emitting diode (21B), respectively, are mixed together to generate white light. The red light has a half-value width hwr such that 15 nm≦hwr≦30 nm, and the green light has a half-value width hwg such that 25 nm≦hwg≦50 nm. The blue light has a half-value width hwb such that 15 nm≦hwb≦30 nm. The white light illuminates a transmissive color liquid crystal display panel (10) from its back side. The transmissive color liquid crystal display panel includes a color filter (19) made up by a tristimulus filter for wavelength-selecting and transmitting red light, green light and blue light.

REFERENCES:
patent: 2003/0063062 (2003-04-01), Tsumura
patent: 2004/0042234 (2004-03-01), Otake
patent: 2003-207770 (2003-07-01), None
patent: 2004-093761 (2004-03-01), None
patent: 2004-118133 (2004-04-01), None
patent: 01/84227 (2001-11-01), None
International Search Report dated Nov. 1, 2005.
European Search Report issued on Jan. 29, 2008 in connection with European Patent Application No. 05770536.0.

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