发明授权
- 专利标题： Circuit for generating a constant voltage from a plurality of predetermined voltages using a capacitive element and switch, and a liquid crystal display apparatus employing such a circuit
- 专利标题（中）： 使用电容元件和开关从多个预定电压产生恒定电压的电路和使用这种电路的液晶显示装置
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申请号： US09012299申请日： 1998-01-23
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公开(公告)号： US06175349B1公开(公告)日： 2001-01-16
- 发明人: Yoshiyuki Kokuhata , Masahiro Takahashi
- 申请人： Yoshiyuki Kokuhata , Masahiro Takahashi
- 优先权： JP9-012687 19970127
- 主分类号： G09G336
- IPC分类号： G09G336
摘要：
A voltage generation circuit includes a potential line for a voltage value VA, a group of potential lines constituted by potential lines for voltage values V1, VM and VS, respectively, a potential line for a voltage value VB, a first capacitor, a second capacitor having a capacitance equal to the capacitance of the first capacitor, a first switch for selectively connecting the first terminal of the first capacitor to the potential line and one potential line out of the group of potential lines, and a second switch for selectively connecting a second terminal of the first capacitor to the potential line that applies a potential symmetric to the potential of one predetermined potential line out of the group of potential lines and to the first terminal of the second capacitor. The second capacitor includes first and second terminals connected to the potential line for VB and the one potential line out of the group of the potential lines, respectively. Connection switching of the first and second switches is controlled so that the first and second capacitors are charged and discharged in a complementary manner.
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