| US 7,453,434 B2 | ||
| Liquid crystal display device | ||
| Hiroyuki Takahashi, Funabashi (Japan); Shinya Hashimoto, Mobara (Japan); and Takahiro Yamada, Mobara (Japan) | ||
| Assigned to Hitachi Displays, Ltd., Chiba-Ken (Japan); and Hitachi Device Engineering Co., Ltd., Chiba-Ken (Japan) | ||
| Filed on Apr. 11, 2003, as Appl. No. 10/411,267. | ||
| Claims priority of application No. 2002-126432 (JP), filed on Apr. 26, 2002. | ||
| Prior Publication US 2003/0201958 A1, Oct. 30, 2003 | ||
| Int. Cl. G09G 3/36 (2006.01) | ||
| U.S. Cl. 345—102 [345/204; 345/205; 345/690; 345/1.1; 345/3.1] | 21 Claims |
| 1. A liquid crystal display device comprising:
a first liquid crystal display panel for displaying an image in a transmission mode, said first liquid crystal display panel
having a number of first pixel electrodes, a first counter electrode for applying an electric field between itself and said
first pixel electrodes, and a first liquid crystal layer interposed between said first pixel electrodes and said first counter
electrode;
a second liquid crystal display panel for displaying an image in a reflection mode, said second liquid crystal display panel
having a number of second pixel electrodes, a second counter electrode for applying an electric field between itself and said
second pixel electrodes, and a second liquid crystal layer interposed between said second pixel electrodes and said second
counter electrode;
a first counter voltage generation circuit for applying a first counter voltage optimized for display of the transmission
mode to said first counter electrode of said first liquid crystal display panel; and
a second counter voltage generation circuit for applying a second counter voltage optimized for display of the reflection
mode to said second counter electrode of said second liquid crystal display panel.
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