LIGHT SOURCE DEVICE

PROBLEM TO BE SOLVED: To provide a light source device whose thickness can be reduced. SOLUTION: The light radiated from light emitting diode elements 39 to 42 are reflected depending on the difference of refractive index between an air layer formed in a concave 33 and a light diffusing plane 33A, s...

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Bibliographische Detailangaben
Hauptverfasser:	HAYASHI KINJI, YASUKAWA TAKEMASA, WADA SATOSHI
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 a light source device whose thickness can be reduced. SOLUTION: The light radiated from light emitting diode elements 39 to 42 are reflected depending on the difference of refractive index between an air layer formed in a concave 33 and a light diffusing plane 33A, so that the light reflected form the plurality of light emitting diodes 31 are efficiently mixed in a light guide member 32, and a plane light source is given in a fictive plane parallel to a light out going plane. The diffusion region of the radiated light is not required to be secured in the whole direction of the thickness of the light guide member 32 as convention, so that the thickness of the light guide 32 can be defined thin, and the thickness of the total device can be made small. COPYRIGHT: (C)2007,JPO&INPIT