发明名称 |
Compensation circuit for common voltage according to gate voltage |
摘要 |
Disclosed is a compensation circuit for a common voltage according to a gate voltage, which compensates the common voltage in accordance with variation in gate high voltage, to obtain an optimal common voltage. The compensation circuit includes a divider to divide a gate high voltage, an adder to add a fed-back common voltage to a voltage output from the divider, and a differential amplifier to differentially amplify a voltage output from the adder, and to output the amplified voltage as a compensated common voltage. |
申请公布号 |
US9389621(B2) |
申请公布日期 |
2016.07.12 |
申请号 |
US201414574685 |
申请日期 |
2014.12.18 |
申请人 |
LG DISPLAY CO., LTD. |
发明人 |
Lee Kyung-Woo;Song Jae-Hun |
分类号 |
H03F3/45;G05F1/46;G09G3/36 |
主分类号 |
H03F3/45 |
代理机构 |
Dentons US LLP |
代理人 |
Dentons US LLP |
主权项 |
1. A compensation circuit for a common voltage, comprising:
a divider to divide a gate high voltage, wherein the gate high voltage is varied in accordance with an ambient temperature, wherein the gate high voltage is increased at a low temperature and decreased at a high temperature; an adder to add a feed-back common voltage supplied directly from a common voltage circuit and a voltage output from the divider; and a differential amplifier to differentially amplify a voltage output from the adder and a voltage from a variable resistor, wherein a voltage output from the differential amplifier is a compensated common voltage based upon the varied gate high voltage. |
地址 |
Seoul KR |