LIQUID CRYSTAL PANEL DRIVING DEVICE

PROBLEM TO BE SOLVED: To completely resolve the danger that the latch-up the occurrence of a scanning drive circuit by generating a signal enabling a gate circuit at a delay of at least one vertical period from the start of the shift operation of a shift register. SOLUTION: An output stage enable pu...

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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 completely resolve the danger that the latch-up the occurrence of a scanning drive circuit by generating a signal enabling a gate circuit at a delay of at least one vertical period from the start of the shift operation of a shift register. SOLUTION: An output stage enable pulse OEV is kept at the L-state to close a gate circuit from the time t2 when power-on reset is released to at least the time t3 when one vertical period of a display region elapses regardless of the unstable output state of a shift register immediately after the application of power. The output data of the shift register based on a shift register clock pulse CPV are blocked by the gate circuit and are not transferred to an output buffer. The current of the output buffer is only a static current of a very small value, thereby the occurrence of latch-up caused by the flow of an unsteady transient current several times the current of the output stage in the stationary state of an output buffer group can be completely resolved.