LIGHT SOURCE SUITABLE FOR LCD BACKLIGHT DISPLAY

PROBLEM TO BE SOLVED: To provide an LED-based light source for a liquid crystal backlight display, which achieves uniform emission and shows superior characteristics in suppressing heat scattering and light loss. SOLUTION: A light source device comprises: a light source consisting of an arranged arr...

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Bibliographische Detailangaben
Hauptverfasser:	MOK THYE LINN, TAN SIEW KIM
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS BLASTING 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 ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRICITY FREQUENCY-CHANGING FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF HEATING INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21Sand F21V, RELATING TO THEFORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THELIGHT EMITTED LIGHTING MECHANICAL ENGINEERING NON-LINEAR OPTICS NON-PORTABLE LIGHTING DEVICES OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS SEMICONDUCTOR DEVICES STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR SYSTEMS THEREOF TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an LED-based light source for a liquid crystal backlight display, which achieves uniform emission and shows superior characteristics in suppressing heat scattering and light loss. SOLUTION: A light source device comprises: a light source consisting of an arranged array of plural LED dies 71; a reflector 72; and a light pipe 73 made of a transparent material layer. According to the device, light emitted vertically from the LED die 71 is reflected by the reflector 72 to fall onto the light pipe 73. The size and cross sectional shape of the reflector 72 is selected so that the light that is emitted from the LED dies 71 to be reflected first at the upper face 74 or lower face 75 of the light pipe 73, can be reflected at an angle larger than the critical angle θc, that is, can be totally reflected. Light, when hitting the lower face 75, is reflected again at an angle larger than the critical angle, or is scattered at a scattering center 78 on the lower face 75. COPYRIGHT: (C)2007,JPO&INPIT