LIQUID CRYSTAL DEVICE

PURPOSE:To enable dimming which generates no flicker even when the driving period of liquid crystal is variable by varying the illumination time of a light source and dimming the light source by a turn-on device which turns on the light source and setting the dimming period in an area wherein the li...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	IWAMOTO HIROBUMI, YAMAMOTO TAKASHI
Format:	Patent
Sprache:	eng
Schlagworte:	ADVERTISING 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 DISPLAYING EDUCATION ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY FREQUENCY-CHANGING LABELS OR NAME-PLATES NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS SEALS SIGNS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	PURPOSE:To enable dimming which generates no flicker even when the driving period of liquid crystal is variable by varying the illumination time of a light source and dimming the light source by a turn-on device which turns on the light source and setting the dimming period in an area wherein the light output of the light source has no pause period. CONSTITUTION:The liquid crystal display device uses the discharge lamp which dims the light source by varying the ON time ratio of chopping control ad its turn-on circuit 12, whose chipping period is set in the area wherein the light output of the discharge lamp 13 has no OFF time. Namely, the dimming period Tch is set to