| US 7,333,157 B2 | ||
| Image display device | ||
| Jun Koide, Tokyo (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Mar. 13, 2006, as Appl. No. 11/375,294. | ||
| Claims priority of application No. 2005-074668 (JP), filed on Mar. 16, 2005. | ||
| Prior Publication US 2006/0209219 A1, Sep. 21, 2006 | ||
| Int. Cl. G02F 1/1335 (2006.01); G02F 1/133 (2006.01) | ||
| U.S. Cl. 349—5 [349/33] | 1 Claim |
| 1. An image display device comprising:
a first TN liquid crystal modulator for modulating the polarization state of a first colored light;
a second TN liquid crystal modulator for modulating the polarization state of a second colored light which has a shorter wavelength
than the first colored light;
a third TN liquid crystal modulator for modulating the polarization state of a third colored light which has a shorter wavelength
than the second colored light; and
an optical system for synthesizing the image light which is emitted from the three liquid crystal modulators, wherein a first
voltage is applied to the first liquid crystal modulator for providing the first colored light with about a half-wavelength
phase difference, and wherein a second voltage which is higher than the first voltage is applied to the second liquid crystal
modulator for providing the second colored light with about a half-wavelength phase difference, and wherein a third voltage
which is higher than the second voltage is applied to the third liquid crystal modulator for providing the third colored light
with about a half-wavelength phase difference.
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