LIGHT GUIDE PLATE, SURFACE LIGHT SOURCE DEVICE AND DISPLAY DEVICE

To provide a guide plate, a surface light source device and a display device that efficiently use light and reduce luminance unevenness.SOLUTION: A light guide plate 30 comprises a light-emitting surface 31, a rear surface 32 arranged opposite to the light-emitting surface 31, and a first side surfa...

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Bibliographische Detailangaben
1. Verfasser:	ASANO EIJI
Format:	Patent
Sprache:	eng ; jpn
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 HEATING LIGHTING MECHANICAL ENGINEERING NON-LINEAR OPTICS NON-PORTABLE LIGHTING DEVICES OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS SYSTEMS THEREOF TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS WEAPONS
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Beschreibung
Zusammenfassung:	To provide a guide plate, a surface light source device and a display device that efficiently use light and reduce luminance unevenness.SOLUTION: A light guide plate 30 comprises a light-emitting surface 31, a rear surface 32 arranged opposite to the light-emitting surface 31, and a first side surface 33 and a second side surface 34 extending between the light-emitting surface 31 and the rear surface 32 in a first direction D1. The first side surface 33 is formed to be larger than the second side surface 34 in the first direction D1. On the side of the rear surface 32 of the light guide plate 30, a plurality of sets, each consisting of a first inclined portion 41 and a second inclined portion 42 adjacent to each other, are repeatedly provided in a second direction D2 extending from the first side surface 33 to the second side surface 34. An acute angle α formed by a first inclined surface 37 of the first inclined portion 41 with the second direction D2 is smaller than an acute angle β formed by a second inclined surface 38 of the second inclined portion 42 with the second direction D2, and the following relationships are satisfied: α