LOW POWER CONSUMPTION LIQUID CRYSTAL DISPLAY DEVICE

PROBLEM TO BE SOLVED: To provide a low power consumption liquid crystal display device of which a picture display range can optionally be set by a user without changing the brightness of a screen and power consumption of back light can be decreased and a driving time of a battery can be prolonged. S...

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Bibliographic Details
Main Author TAKIZAWA KAZUTO
Format Patent
LanguageEnglish
Published 14.02.1997
Edition6
Subjects
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
FREQUENCY-CHANGING
NON-LINEAR OPTICS
OPTICAL ANALOGUE/DIGITAL CONVERTERS
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICAL LOGIC ELEMENTS
OPTICS
PHYSICS
TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Summary:PROBLEM TO BE SOLVED: To provide a low power consumption liquid crystal display device of which a picture display range can optionally be set by a user without changing the brightness of a screen and power consumption of back light can be decreased and a driving time of a battery can be prolonged. SOLUTION: This device is constituted of defusing/polarizing plate 4 having a filter to uniform a brightness of whole screen, back lights 5a, 5b having different power consumptions arranged at the rear side or at the side of the defusing/ polarizing plate 4, and a changeover switch 6 for turning on the back lights.
Bibliography:Application Number: JP19950191745