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1. WO2012070467 - LIGHT DIFFUSION PLATE, SURFACE LIGHT SOURCE DEVICE, LIQUID CRYSTAL DISPLAY DEVICE, AND METHOD FOR PRODUCING SURFACE PROFILE TRANSFER RESIN SHEET

Publication Number WO/2012/070467
Publication Date 31.05.2012
International Application No. PCT/JP2011/076548
International Filing Date 17.11.2011
IPC
G02B 5/02 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5Optical elements other than lenses
02Diffusing elements; Afocal elements
F21S 2/00 2006.01
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 3/00 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
3Globes; Bowls; Cover glasses
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
G02B 5/0215
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5Optical elements other than lenses
02Diffusing elements; Afocal elements
0205characterised by the diffusing properties
021the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
0215the surface having a regular structure
G02B 5/0278
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5Optical elements other than lenses
02Diffusing elements; Afocal elements
0273characterized by the use
0278used in transmission
Applicants
  • 住友化学株式会社 SUMITOMO CHEMICAL COMPANY, LIMITED [JP]/[JP] (AllExceptUS)
  • 奥 尚規 OKU Hisanori [JP]/[JP] (UsOnly)
  • 角谷 英則 KADOYA Hidenori [JP]/[JP] (UsOnly)
Inventors
  • 奥 尚規 OKU Hisanori
  • 角谷 英則 KADOYA Hidenori
Agents
  • 長谷川 芳樹 HASEGAWA Yoshiki
Priority Data
2010-26133324.11.2010JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) LIGHT DIFFUSION PLATE, SURFACE LIGHT SOURCE DEVICE, LIQUID CRYSTAL DISPLAY DEVICE, AND METHOD FOR PRODUCING SURFACE PROFILE TRANSFER RESIN SHEET
(FR) PLAQUE DE DIFFUSION DE LA LUMIÈRE, DISPOSITIF DE SOURCE DE LUMIÈRE DE SURFACE, DISPOSITIF D'AFFICHAGE À CRISTAUX LIQUIDES ET PROCÉDÉ POUR PRODUIRE UNE FEUILLE DE RÉSINE DE TRANSFERT DE PROFIL DE SURFACE
(JA) 光拡散板、面光源装置、液晶表示装置および表面形状転写樹脂シートの製造方法
Abstract
(EN)
Provided are: a light diffusion plate which is capable of suppressing illumination unevenness regardless of the viewing angle, while maintaining good light transmitting properties; a surface light source which is provided with the light diffusion plate; and a liquid crystal display device. A light diffusion plate (9) is formed of a light-transmitting resin which has a back surface (18) that is provided with a fine recessed and projected pattern (19) and a front surface (15) that is provided with a plurality of linear half-round ridges (16) that are parallel to each other. The light diffusion plate (9) has an internal haze of 0-60% and an outer haze due to the fine recessed and projected pattern (19) of 71-99%.
(FR)
L'invention porte sur : une plaque de diffusion de la lumière qui est apte à supprimer une irrégularité d'éclairage quel que soit l'angle de visualisation, tout en conservant de bonnes propriétés de transmission de la lumière ; une source de lumière de surface qui comporte la plaque de diffusion de la lumière ; et un dispositif d'affichage à cristaux liquides. Une plaque de diffusion de la lumière (9) est constituée par une résine transmettant la lumière qui a une surface arrière (18) qui comporte un motif à creux et saillies fins (19) et une surface avant (15) qui comporte une pluralité d'arêtes semi-rondes linéaires (16) qui sont parallèles les unes aux autres. La plaque de diffusion de la lumière (9) a un voile interne de 0 à 60 % et un voile externe dû au motif à creux et saillies fins (19) de 71 à 99 %.
(JA)
 良好な透光性を維持しつつ、見る角度に関係なく照明斑を抑制することができる光拡散板、およびこれを備える面光源装置および液晶表示装置を提供する。 光拡散板(9)は、微細な凹凸(19)が形成された背面(18)と、複数の直線状の半円凸条(16)が互いに平行に形成された前面(15)とを有する透光性樹脂からなり、内部ヘイズが0~60%であり、微細な凹凸(19)に基づく外部ヘイズが71~99%である。
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