LIQUID CRYSTAL DISPLAY DEVICE

PROBLEM TO BE SOLVED: To provide a liquid crystal display device capable of improving color reproducibility even when a plurality of kinds of light sources are used as a back light. SOLUTION: When the value of temperature detected by a temperature detecting circuit is lower than a preset temperature...

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Bibliographische Detailangaben
Hauptverfasser:	MORIYASU MITSUHIRO, CHIKASAWA HIDEYUKI
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 ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY 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 provide a liquid crystal display device capable of improving color reproducibility even when a plurality of kinds of light sources are used as a back light. SOLUTION: When the value of temperature detected by a temperature detecting circuit is lower than a preset temperature value T1, a cold-cathode fluorescent tube (CFL) is turned on with a duty ratio of 100%, thereby increasing luminance. When the temperature detected value increases above the preset temperature value T1, the duty ratio is varied to a value that a user sets and the CFL is turned on. COPYRIGHT: (C)2007,JPO&INPIT