MANUFACTURE OF LIGHT GUIDE MEMBER AND SURFACE LIGHT EMITTING DEVICE USING THEREOF

PROBLEM TO BE SOLVED: To accurately form a protrusion of a light guide plate, and to increase the brightness and a whole surface light emitting device, by injection molding of a light transmissive resin, using a mold member obtained by forming a recess having a tilted face to a material having a smo...

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Bibliographische Detailangaben
Hauptverfasser:	ONO MASAFUMI, YAMAGAMI TAKEHARU, YOSHIKAWA YUKIO, TOMOSADA KEIICHIROU
Format:	Patent
Sprache:	eng
Schlagworte:	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 FREQUENCY-CHANGING FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF HEATING LIGHTING MECHANICAL ENGINEERING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To accurately form a protrusion of a light guide plate, and to increase the brightness and a whole surface light emitting device, by injection molding of a light transmissive resin, using a mold member obtained by forming a recess having a tilted face to a material having a smooth face, machining the smooth face and the recess to obtain a prescribed roughness, and provided only the smooth face with a mirror finished surface. SOLUTION: All the mold recesses 102 to be used as cavities for molding protrusions, are successively cutted and machined by a cutting tool 30, and then a face farther from a light source of the protrusions, of a tilted face devoted for reflection, is machined with an accurate vertical angle. The abrasive grain of a given grain size is injected from a sand blast nozzle 300 to the material 101a, to roughen both of the smooth face 103 and the mold recess 102, then the roughened smooth face 103 is ground by a grinder 301, and the complete mirror finished surface is formed on the smooth face by the polishing. The material 101a having only the roughened face on the mold recess 102 face, is removed, to be integrated with a block member of a mold.