| US 7,474,274 B2 | ||
| Display device and electronic device using the same | ||
| Tsutomu Matsuhira, Chiba (Japan); Hiroki Hanawa, Chiba (Japan); Nobuyuki Sasaki, Chiba (Japan); and Hideaki Adachi, Chiba (Japan) | ||
| Assigned to Seiko Instruments Inc., (Japan) | ||
| Filed on Oct. 07, 2004, as Appl. No. 10/960,167. | ||
| Claims priority of application No. 2003-349173 (JP), filed on Oct. 08, 2003; and application No. 2004-291522 (JP), filed on Oct. 04, 2004. | ||
| Prior Publication US 2005/0174300 A1, Aug. 11, 2005 | ||
| Int. Cl. G09G 5/00 (2006.01) | ||
| U.S. Cl. 345—1.1 [345/169; 345/211] | 20 Claims |
| 1. A display device, comprising:
a first display panel having first liquid crystals held between substrates;
a second display panel having second liquid crystals held between substrates, an optimal driver voltage of the second liquid
crystals being different from that of the first liquid crystals of the first display panel; and
a driver integrated circuit that selectively switches between a first driver signal and a second driver signal and supplies
the selected driver signal in parallel to the first display panel and to the second display panel,
wherein the first driver signal has an optimal driver voltage for the first display panel and the second driver signal has
an optimal driver voltage for the second display panel, and wherein the second display panel exhibits a single color display
over its entire display area when the first driver signal is supplied in parallel to the first display panel and to the second
display panel.
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