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1. 发明授权

US06476591B2 Power supply device for driving liquid crystal, liquid crystal device and electronic equipment using the same 有权
标题翻译：用于驱动液晶的电源装置，液晶装置和使用其的电子设备
公开(公告)号：US06476591B2
公开(公告)日：2002-11-05
申请号：US09977941
申请日：2001-10-17
申请人： Hisashi Yamaguchi , Tadashi Yasue
发明人： Hisashi Yamaguchi , Tadashi Yasue
IPC分类号： H03H106
CPC分类号： G09G3/3696 , G09G2330/021
摘要： A power supply device for driving liquid crystal which generates four liquid crystal drive voltages V1 and V4 between first and second reference voltages, the power supply device comprising: a voltage division circuit 102 which divides a voltage between voltages between voltages V1 and V5 and generates four pairs of first voltages NV1 to NV4 and second voltages PV1 to PV4; and four impedance conversion circuits 103 and 104 which generate impedance converted liquid crystal drive voltages V1 to V4 based on the four pairs of the first and second voltages. Each impedance conversion circuit comprises voltage follower type of differential amplifier circuits 120 and 110 to which a pair of the first and second voltages is input, and an output circuit 130 which is driven by the differential amplification circuits. The N-type transistor 134 and P-type transistor 132 in the output circuit are independently driven by the first and second output voltages VN, VP from the differential amplification circuits 120 and 110.
摘要翻译：一种用于驱动液晶的电源装置，其在第一和第二参考电压之间产生四个液晶驱动电压V1和V4，所述电源装置包括：分压电路102，其分压电压V1和V5之间的电压，并产生四个一对第一电压NV1至NV4和第二电压PV1至PV4; 以及基于四对第一和第二电压产生阻抗转换的液晶驱动电压V1至V4的四个阻抗转换电路103和104。每个阻抗转换电路包括输入一对第一和第二电压的电压跟随器类型的差分放大器电路120和110，以及由差分放大电路驱动的输出电路130。输出电路中的N型晶体管134和P型晶体管132由差分放大电路120和110的第一和第二输出电压VN，VP独立地驱动。

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