OPTICAL SHEET, BACKLIGHT UNIT USING THE SAME, AND DISPLAY DEVICE

PROBLEM TO BE SOLVED: To efficiently take out light from a light source and to suppress luminance unevenness in an optical sheet, a backlight unit using the same and a display device. SOLUTION: The optical sheet 21 used in the display device 100 has: a sheet-shaped light transmission part 4; a lens...

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Bibliographische Detailangaben
1. Verfasser:	FUKUNAGA SATOHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	ADVERTISING BLASTING CRYPTOGRAPHY 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 DISPLAY DISPLAYING EDUCATION FREQUENCY-CHANGING 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 LABELS OR NAME-PLATES LIGHTING MECHANICAL ENGINEERING NON-LINEAR OPTICS NON-PORTABLE LIGHTING DEVICES OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS SEALS SIGNS 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 efficiently take out light from a light source and to suppress luminance unevenness in an optical sheet, a backlight unit using the same and a display device. SOLUTION: The optical sheet 21 used in the display device 100 has: a sheet-shaped light transmission part 4; a lens part 1 having a lens 1A and the like arranged on an emission side interface 4c to be one sheet surface of the light transmission part 4; and a light shielding part 5 having optical apertures 5a formed in positions respectively opposed to the lens 1A and the like on an incident side interface to be the other sheet surface of the light transmission part 4. The light transmission part 4 is provided with a boundary surface 4b changing from a relatively high refractive index to a relatively low refractive index in a position except the incident side interface 4a in the sheet thickness direction from the light shielding part 5 toward the lens part 1. COPYRIGHT: (C)2009,JPO&INPIT