发明名称 DEVICE FOR DRIVING LIQUID CRYSTAL PANEL AND PORTABLE INFORMATION EQUIPMENT
摘要 PROBLEM TO BE SOLVED: To solve the problem that a screen picture display immediately before a power supply is turned off remains for a few seconds and can be seen on a reflective liquid crystal panel with a conventional driving device, and this has been unseemly and a cause of degradation of display quality. SOLUTION: A power supply delay circuit 5-1 makes a scanning driving circuit 2 and a data driving circuit 3 operate keeping the power supply on-state at least for one vertical period of time after it is turned off. Moreover, a chroma circuit 5-2 fixes data signals to be inputted to the data driving circuit 3 at a display color at the time of non-voltage applicated the reflective liquid crystal panel to be used. In such a manner, the remaining image of a screen picture at the time of turning off the power supply is eliminated, and display quality can be improved.
申请公布号 JP2001272650(A) 申请公布日期 2001.10.05
申请号 JP20000088804 申请日期 2000.03.28
申请人 MATSUSHITA ELECTRIC IND CO LTD 发明人 TAKAHASHI KIMIYO
分类号 G02F1/133;G09G3/20;G09G3/36;(IPC1-7):G02F1/133 主分类号 G02F1/133
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