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1. WO2019045095 - BACKLIGHT UNIT AND LIQUID CRYSTAL DISPLAY DEVICE

Publication Number WO/2019/045095
Publication Date 07.03.2019
International Application No. PCT/JP2018/032594
International Filing Date 03.09.2018
IPC
F21S 2/00 2016.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
21LIGHTING
SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
2Systems of lighting devices, not provided for in main groups F21S4/-F21S10/113
F21V 5/00 2018.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
21LIGHTING
VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
5Refractors for light sources
F21V 5/04 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
21LIGHTING
VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
5Refractors for light sources
04of lens shape
G02B 3/00 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
3Simple or compound lenses
G02B 5/02 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5Optical elements other than lenses
02Diffusing elements; Afocal elements
G02F 1/13357 2006.01
GPHYSICS
02OPTICS
FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
01for the control of the intensity, phase, polarisation or colour
13based on liquid crystals, e.g. single liquid crystal display cells
133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
1333Constructional arrangements
1335Structural association of cells with optical devices, e.g. polarisers or reflectors
13357Illuminating devices
CPC
F21S 2/00
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
21LIGHTING
SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
2Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
F21V 5/00
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
21LIGHTING
VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
5Refractors for light sources
F21V 5/04
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
21LIGHTING
VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
5Refractors for light sources
04of lens shape
G02B 19/00
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
19Condensers, ; e.g. light collectors or similar non-imaging optics
G02B 3/0056
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
3Simple or compound lenses
0006Arrays
0037characterized by the distribution or form of lenses
0056arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses
G02B 6/0053
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
0001specially adapted for lighting devices or systems
0011the light guides being planar or of plate-like form
0033Means for improving the coupling-out of light from the light guide
005provided by one optical element, or plurality thereof, placed on the light output side of the light guide
0053Prismatic sheet or layer; Brightness enhancement element, sheet or layer
Applicants
  • 富士フイルム株式会社 FUJIFILM CORPORATION [JP]/[JP]
Inventors
  • 渡邉 晋也 WATANABE Shinya
  • 関口 恵 SEKIGUCHI Megumi
  • 矢内 雄二郎 YANAI Yujiro
  • 山田 直良 YAMADA Naoyoshi
  • 齊藤 之人 SAITOH Yukito
Agents
  • 渡辺 望稔 WATANABE Mochitoshi
  • 伊東 秀明 ITOH Hideaki
  • 三橋 史生 MITSUHASHI Fumio
Priority Data
2017-16966604.09.2017JP
2017-23021030.11.2017JP
2018-09561017.05.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) BACKLIGHT UNIT AND LIQUID CRYSTAL DISPLAY DEVICE
(FR) UNITÉ DE RÉTROÉCLAIRAGE ET DISPOSITIF D'AFFICHAGE À CRISTAUX LIQUIDES
(JA) バックライトユニットおよび液晶表示装置
Abstract
(EN)
The purpose of the present invention is to enhance the front surface luminance, reduce light leakage in a diagonal direction when displaying black, and improve the display performance. A backlight unit including light sources, a light guide plate, and a light-collimating member in which a lens array is formed on one surface of a transparent substrate and a plurality of truncated cones are arranged on the other surface of the transparent substrate, wherein: the truncated cones on the light-collimating member are shaped such that the width thereof progressively decreases further from the transparent substrate with respect to the height direction; the position of each of the lenses of the lens array is displaced, relative to the position of the truncated cone corresponding to the lens, away from the light source nearest to the lens with respect to a direction linking the center of the lens and the light source nearest to the lens; the optical axis of a lens is disposed so as to pass through the inclined surface of the truncated cone corresponding to the lens; the light guide plate and the surface of the truncated cones on the opposite side from the transparent-substrate side are in contact with each other; and the shape of the truncated cones on the light-collimating member satisfies a specific numerical relationship.
(FR)
Le but de la présente invention est d'améliorer la luminance de surface avant, de réduire une fuite de lumière dans une direction diagonale lors de l'affichage de noir, et d'améliorer les performances d'affichage. Une unité de rétroéclairage comprend des sources de lumière, une plaque de guidage de lumière et un élément de collimation de lumière dans lequel un réseau de lentilles est formé sur une surface d'un substrat transparent et une pluralité de cônes tronqués sont agencés sur l'autre surface du substrat transparent, les cônes tronqués sur l'élément de collimation de lumière étant formés de telle sorte que leur largeur diminue progressivement en s'éloignant du substrat transparent par rapport à la direction de hauteur ; la position de chacune des lentilles du réseau de lentilles étant déplacée, par rapport à la position du cône tronqué correspondant à la lentille, à distance de la source de lumière la plus proche de la lentille par rapport à une direction reliant le centre de la lentille et la source de lumière la plus proche de la lentille ; l'axe optique d'une lentille étant disposé de manière à passer à travers la surface inclinée du cône tronqué correspondant à la lentille ; la plaque de guidage de lumière et la surface des cônes tronqués sur le côté opposé à partir du côté substrat transparent étant en contact l'une avec l'autre ; et la forme des cônes tronqués sur l'élément de collimation de lumière satisfaisant une relation numérique spécifique.
(JA)
正面輝度を上昇させるとともに、黒表示時の斜め方向の光漏れを低減し表示性能を向上させる。透明基材の片面にレンズアレイが形成されており、透明基材のもう一方の面に複数の円錐台形が配列している光平行化部材と、導光板と、光源とを含むバックライトユニットであって、光平行化部材上の円錐台形は、高さ方向において透明基材から離れるにしたがって幅が狭くなる形状であり、レンズアレイの各レンズの位置がこのレンズに対応する円錐台形の位置に対して、レンズの中心とこのレンズから最も近い光源とを結んだ方向において、光源から遠い方向にずれており、レンズの光軸がこのレンズに対応する円錐台形の斜面を通るように配置されており、導光板と円錐台形の透明基材側とは反対側の表面が接しており、光平行化部材の円錐台形の形状が特定の数式を満たす。
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