LIGHTING DEVICE AND DISPLAY DEVICE

• Main Authors: ISHIDA TAKESHI, MASUDA TAKASHI
• Format: Patent
• Language: English; Japanese
• Published: 25.07.2019
• Subjects: 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; 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

To restrict an emission direction of light emitted from a lighting device more securely.SOLUTION: A lighting device includes: a light guide plate 33 having a light emission surface 36; a reflection type polarization plate 40 which covers the light emission surface 36 and provides optical effect to light from the light guide plate 33; and a prism sheet 50 which covers the reflection type polarization plate 40 from the opposite side of the light guide plate 33, the prism sheet 50 having multiple prism parts 52 and light reflection parts 53 which cover inclined surfaces 55 of the prism parts 52 which are opposite to the reflection type polarization plate 40.SELECTED DRAWING: Figure 1 【課題】照明装置からの出射光の出射方向をより確実に規制する。【解決手段】光出射面３６を有する導光板３３と、光出射面３６を覆うと共に導光板３３からの光に光学作用を付与する反射型偏光板４０と、反射型偏光板４０を導光板３３とは反対側から覆うプリズムシート５０であって、複数のプリズム部５２と、プリズム部５２における反射型偏光板４０とは反対側の斜面５５を覆う光反射部５３と、を有するプリズムシート５０と、を備えることに特徴を有する。【選択図】図１