PLANAR LIGHTING APPARATUS

PROBLEM TO BE SOLVED: To provide a planar lighting apparatus which effectively utilizes light in the case the sizes of liquid crystal display devices arranged on both surfaces of a light transmission plate vary and is ameliorated in the luminance unevenness of the liquid crystal display devices. SOL...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	TAKAYANAGI KAZUTOSHI, MIZUTANI HITOSHI, EGAWA MOTOJI, KAWASHIMA SATOYUKI, ISHIGAMI KATSUJI
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 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 ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS 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 planar lighting apparatus which effectively utilizes light in the case the sizes of liquid crystal display devices arranged on both surfaces of a light transmission plate vary and is ameliorated in the luminance unevenness of the liquid crystal display devices. SOLUTION: A light source 1 is arranged on one end surface side of the light transmission plate 11 constituted to guide the exit light from the light source 1 to the side of the body illuminated from an exit surface. A first liquid crystal display element D1 and a second liquid crystal display element D2 are respectively disposed on both surfaces of the plate 11. The element D2 is smaller in display area than the element D1. A non-display region (a) of the exit surface on which the element D2 is disposed is equipped with a reflecting means 2. The light emitted to the region (a) is reflected by the reflecting means 2 and is made incident on the element D1 to increase the luminance of the element D1 and to reduce the luminance unevenness. COPYRIGHT: (C)2005,JPO&NCIPI