DEVICE FOR DRIVING LIQUID CRYSTAL PANEL AND PORTABLE INFORMATION EQUIPMENT

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...

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Bibliographische Detailangaben
1. Verfasser:	TAKAHASHI KIMIYO
Format:	Patent
Sprache:	eng
Schlagworte:	ADVERTISING ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION CRYPTOGRAPHY DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING DISPLAY EDUCATION FREQUENCY-CHANGING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS SEALS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	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.