公开(公告)号：US20020101416A1

公开(公告)日：2002-08-01

申请号：US10012396

申请日：2001-12-12

Applicant: LG. Philips LCD Co., Ltd.

Inventor： You Tack Woo ,  Sang Gyu Kim ,  Youn Su Kang

IPC: G09G005/00

CPC classification number: G09G3/3611 ,  G09G2320/0276

Abstract: A liquid crystal display device include a gamma a voltage controller. The gamma voltage controller includes a voltage-divider network of resistive elements and is part of a gamma voltage circuit, which also includes a programmable digital-to-analog converter. The output voltage signals from the programmable digital-to-analog converter are input to the gamma voltage controller for requisite voltage division. The voltage difference between any two voltage signals output from the gamma voltage controller (i.e., the gamma reference voltage signals) can be finely aligned by setting appropriate values for different resistive elements in the gamma voltage controller. This allows generation of gamma reference voltage signals whose voltages can be precisely controlled according to the T-V characteristics of a liquid crystal display panel in the liquid crystal display device.

Abstract translation: 液晶显示装置包括伽马电压控制器。 伽马电压控制器包括电阻元件的分压网络，并且是伽马电压电路的一部分，其还包括可编程数模转换器。 可编程数模转换器的输出电压信号输入到伽玛电压控制器进行必要的分压。 通过设置γ电压控制器中的不同电阻元件的适当值，可以精确地对准从γ电压控制器输出的任何两个电压信号之间的电压差（即伽马参考电压信号）。 这允许产生可以根据液晶显示装置中的液晶显示面板的T-V特性精确地控制其电压的伽马参考电压信号。