Backlight Device and Transmission Type Liquid Crystal Display Apparatus

A transmission liquid crystal display device using a backlight device for supplying display light emitted from a large number of light emission diodes to a transmission display panel. The transmission liquid crystal display device has an optical sheet block ( 10 ) between a liquid crystal panel ( 5...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	MAHAMA KAZUTOSHI, HATANAKA MASATO
Format:	Patent
Sprache:	eng
Schlagworte:	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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Beschreibung
Zusammenfassung:	A transmission liquid crystal display device using a backlight device for supplying display light emitted from a large number of light emission diodes to a transmission display panel. The transmission liquid crystal display device has an optical sheet block ( 10 ) between a liquid crystal panel ( 5 ) and a light source unit ( 7 ) having a large number of LEDs ( 12 ) and has a light diffusion plate ( 15 ), which has light transmission properties and is made of resin, for controlling the incidence of display light emitted from each of the LEDs ( 12 ). On the light diffusion plate ( 15 ) are formed vertically long light modulation patterns ( 18 ) by using light reflective ink. Each pattern ( 18 ) faces each LED ( 12 ) and has a size equal to the size of each LED ( 12 ) including its external shape. The light modulation patterns ( 18 ) uniformize the light emitted from the LEDs ( 12 ) and realize an image display of high brightness where color irregularity and horizontal stripes are suppressed.