OPTICAL SHEET, AND BACKLIGHT UNIT AND DISPLAY DEVICE USING SAME

PROBLEM TO BE SOLVED: To provide an optical sheet which can be thinned, and a backlight unit for display and a display device which can be thinned. SOLUTION: The optical sheet 38 is constituted of a light-diffusible base material 39, a lens part 45, a film 60, and a reflection layer 47. The lens par...

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Bibliographic Details
Main Author SAKAI NATSUKA
Format Patent
LanguageEnglish
Published 14.08.2008
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
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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Summary:PROBLEM TO BE SOLVED: To provide an optical sheet which can be thinned, and a backlight unit for display and a display device which can be thinned. SOLUTION: The optical sheet 38 is constituted of a light-diffusible base material 39, a lens part 45, a film 60, and a reflection layer 47. The lens part 45 is constituted of a convex cylindrical lens group or a semi-spherical convex lens group. The film 60 is bonded to the surface in such a thickness direction that the light-diffusible base material 39 faces an image display element and is formed of a material having a water absorption rate lower than that of a material constituting the light-diffusible base material 39. The reflection layer 47 is constituted of light reflection parts 48 each provided to a region including a light non-convergence surface by the lens part 45 and light transmission parts (opening parts) 46 each provided to the vicinity of the focal point surface of each lens 44. COPYRIGHT: (C)2008,JPO&INPIT
Bibliography:Application Number: JP20070018115