发明名称 |
Liquid crystal display device and driving method of a liquid crystal display device |
摘要 |
A liquid crystal display device includes a gate driver, a source driver and a common driver. An input video signal is stored in a line memory and a gray scale with which an applied voltage becomes highest is detected from data corresponding to 1 line among the signal. A common electrode is driven by a common voltage being reduced in accordance with the gray scale and having a low effective value. The driver is driven by an output controlled in accordance with the voltage thus reduced. A voltage applied to a common electrode is set by using a LUT and a common voltage is set by using a LUT. It is therefore possible to provide a liquid crystal display device and a method of driving the liquid crystal display device, each of which can reduce power consumption. |
申请公布号 |
US9024854(B2) |
申请公布日期 |
2015.05.05 |
申请号 |
US201113695328 |
申请日期 |
2011.03.02 |
申请人 |
Sharp Kabushiki Kaisha |
发明人 |
Nakata Jun;Uehata Masaki |
分类号 |
G09G3/36 |
主分类号 |
G09G3/36 |
代理机构 |
Lowe Hauptman & Ham, LLP |
代理人 |
Lowe Hauptman & Ham, LLP |
主权项 |
1. A liquid crystal display device for carrying out such common voltage reversal driving that a common voltage is reversed per predetermined time period, comprising:
a gate driver; a source driver; a common driver; a memory for (i) setting a certain time period in a video signal as a detection time period for detecting a maximum gray scale, and (ii) storing a signal corresponding to the certain time period; a detector for detecting, among the signal which corresponds to the certain time period and is stored in the memory, a gray scale X with which an applied voltage becomes highest; a first look-up table with which a lowest common voltage Y in a range for displaying the gray scale X is selected with the use of (i) a signal corresponding to a previous detection time period and (ii) a gray scale X in the signal corresponding to the previous detection time period; and a second look-up table with which an optimum γ setting for the common voltage Y is selected. |
地址 |
Osaka JP |