Light guiding plate, surface light source device, transmission image display device

Provided is a light guide panel, a surface light source device and a transmission image display device. The light guide panel is arranged at the back surface side of a prism plate. The prism plate is provided with a plurality of prism units arranged on a surface in row, and each prism unit extends i...

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Bibliographische Detailangaben
Hauptverfasser:	SEKIGUCHI YASUHIRO, HYAKUTA KENTAROU, OHTA HIROFUMI
Format:	Patent
Sprache:	eng ; pol
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 ELEMENTS, SYSTEMS, OR APPARATUS 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:	Provided is a light guide panel, a surface light source device and a transmission image display device. The light guide panel is arranged at the back surface side of a prism plate. The prism plate is provided with a plurality of prism units arranged on a surface in row, and each prism unit extends in one direction. The light guide panel comprises: a main body which has a first surface and a second surface opposite to each other and an incidence surface intersecting with the first surface and the second surface; and a plurality of lens units formed on the second surface. Each lens unit has an external shape that enables the value greater than 1.055%, wherein the value is obtained by multiplying the ratio of the luminous flux of light emitted to a preset direction from a point on the first surface to the luminous flux of light emitted to all directions from the point, by the ratio of the amount of light from the first surface and the amount of light incoming to the incidence surface and the ratio is as light emission efficiency. The preset direction is of the direction about 30 DEG to the first surface normal in the planner of basically perpendicular to the lens unit extending direction.