| US 7,525,467 B2 | ||
| System for displaying image and digital-to-analog converting method | ||
| Wei-Cheng Lin, Hsinchu (Taiwan); Kai-Chieh Yang, Kaohsiung (Taiwan); Keiichi Sano, Taipei (Taiwan); Fang-Hsing Wang, Taichung (Taiwan); and Ting-Yu Chang, Kaohsiung (Taiwan) | ||
| Assigned to TPO Displays Corp., Miao-Li Country (Taiwan) | ||
| Filed on Feb. 15, 2008, as Appl. No. 12/31,736. | ||
| Claims priority of application No. 96106081 A (TW), filed on Feb. 16, 2007. | ||
| Prior Publication US 2008/0198054 A1, Aug. 21, 2008 | ||
| Int. Cl. H03M 1/66 (2006.01) | ||
| U.S. Cl. 341—144 [341/150] | 20 Claims |
| 1. An image display system, having a digital to analog converter comprising:
a charge sharing circuit receiving first to (N−1)th bits of serial digital signals by sequence and sharing and storing charges
in a first capacitor and a second capacitor by sequence according to a reference voltage, a ground voltage, a first clock
signal and the first to (N−1)th bits of serial digital signals; and
a voltage boosting circuit determining whether to boost a first terminal and a second terminal of the second capacitor to
the reference voltage according to a second clock signal and an Nth bit of the serial digital signal after receiving the (N−1)th
bit of the serial digital signal,
wherein the charge sharing circuit outputs an analog signal from the second terminal of the second capacitor after the voltage
boosting circuit receives the Nth bit of the serial digital signal.
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