| US 7,474,366 B2 | ||
| Color liquid crystal display device | ||
| Shuichi Haga, Kanagawa (Japan); Tatsuhiko Matsumoto, Tokyo (Japan); Tsuneo Kusunoki, Kanagawa (Japan); Takahiro Igarashi, Kanagawa (Japan); Yoshihide Shimpuku, Kanagawa (Japan); and Takehiro Nakatsue, Kanagawa (Japan) | ||
| Assigned to Sony Corporation, Tokyo (Japan) | ||
| Filed on Mar. 20, 2006, as Appl. No. 11/384,780. | ||
| Prior Publication US 2006/0227260 A1, Oct. 12, 2006 | ||
| Int. Cl. G02F 1/1335 (2006.01) | ||
| U.S. Cl. 349—61 [349/70; 349/97; 349/106; 349/109] | 12 Claims |
| 1. A color liquid crystal display device, comprising:
a transmissive color liquid crystal display panel that comprises:
a color filter divided into segments, wherein each segment corresponds to a pixel and comprises a red filter, a green filter,
and a blue filter; and
a liquid crystal display backlight light source which emits white light and illuminates said color liquid crystal display
panel from a rear side,
wherein said backlight light source includes a fluorescent lamp in which a chromaticity point of the white light emitted is
in the vicinity of (x, y)=(0.275, 0.275) in an xy chromaticity diagram of an XYZ color system, and
wherein each of said red filter, said green filter, and said blue filter selects a wavelength to transmit respective red light,
green light and blue light, and at least said blue filter has a spectroscopic characteristic with a peak wavelength that is
420 nm or more and 455 nm or less and a half maximum full-width that is 110 nm or less.
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