| US 7,562,988 B2 | ||
| Two-dimensional image display device | ||
| Ken'ichi Kasazumi, Osaka (Japan); Kiminori Mizuuchi, Osaka (Japan); and Kazuhisa Yamamoto, Osaka (Japan) | ||
| Assigned to Panasonic Corporation, Osaka (Japan) | ||
| Appl. No. 10/584,074 PCT Filed Dec. 21, 2004, PCT No. PCT/JP2004/019059 § 371(c)(1), (2), (4) Date Jun. 22, 2006, PCT Pub. No. WO2005/062116, PCT Pub. Date Jul. 07, 2005. |
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| Claims priority of application No. 2003-425599 (JP), filed on Dec. 22, 2003. | ||
| Prior Publication US 2007/0165184 A1, Jul. 19, 2007 | ||
| Int. Cl. G03B 21/00 (2006.01); G03B 21/20 (2006.01); G03B 21/26 (2006.01) | ||
| U.S. Cl. 353—94 [353/31; 353/85] | 6 Claims |
| 1. A two-dimensional image display device comprising:
a red light source for emitting red light;
a green light source for emitting green light;
a blue light source for emitting blue light; and
a means for forming a two-dimensional image by using the red light, the green light and the blue light emitted from the respective
red, green and blue light sources,
wherein a center wavelength of the blue light emitted from the blue light source is not less than 420 nm and is not larger
than 455 nm,
wherein a center wavelength of the red light emitted from the red light source is not less than 635 nm and is not larger than
655 nm,
wherein a center wavelength of the green light emitted from the green light source is not less than 505 nm and is not larger
than 550 nm,
wherein a ratio of the blue light emitted from the blue light source to the green light emitted from the green light source
during a white display is not less than 0.5:1 and is not larger than 4:1, and
wherein a ratio of the red light emitted from the red light source to the green light emitted from the green light source
during the white display is not less than 0.4:1 and is not larger than 1.3:1.
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