DIRECT TYPE BACKLIGHT DEVICE AND LIQUID CRYSTAL DISPLAY USING THE SAME

A direct type LED backlight device improves color unevenness on the periphery of the display region without increase of the driver and its control circuit and contour change of a liquid crystal panel. This device includes a bottom wall, a set of optical members arranged opposite to an inner surface...

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Bibliographische Detailangaben
1. Verfasser:	SUGAYA HIROKI
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 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:	A direct type LED backlight device improves color unevenness on the periphery of the display region without increase of the driver and its control circuit and contour change of a liquid crystal panel. This device includes a bottom wall, a set of optical members arranged opposite to an inner surface of the bottom wall, a side wall maintaining the bottom wall and the set of optical members at a predetermined distance, and LEDs fixed to the inner surface of the bottom wall. The side wall has a protrusion protruding toward a central portion of a space formed by the bottom wall, the side wall, and the set of optical members. At least part of emission surfaces of the LEDs arranged at outermost positions are overlapped with the protrusion and located at such positions as to be invisible when seen along a direction perpendicular to the set of optical members.