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1. WO2002018984 - OPTICAL SHEET USING DIFFRACTION GRATING, AND DISPLAY DEVICE USING THE OPTICAL SHEET

Publication Number WO/2002/018984
Publication Date 07.03.2002
International Application No. PCT/JP2001/007474
International Filing Date 30.08.2001
IPC
G02B 5/18 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5Optical elements other than lenses
18Diffracting gratings
G02F 1/1335 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
CPC
G02B 5/1842
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5Optical elements other than lenses
18Diffraction gratings
1842Gratings for image generation
G02B 5/1866
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5Optical elements other than lenses
18Diffraction gratings
1866Transmission gratings characterised by their structure, e.g. step profile, contours of substrate or grooves, pitch variations, materials
G02B 5/1871
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5Optical elements other than lenses
18Diffraction gratings
1866Transmission gratings characterised by their structure, e.g. step profile, contours of substrate or grooves, pitch variations, materials
1871Transmissive phase gratings
G02F 1/133504
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; ; Manufacturing methods
1335Structural association of cells with optical devices, e.g. polarisers or reflectors
133504Diffusing, scattering, diffracting elements
G02F 2201/305
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
2201Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
30grating
305diffraction grating
Applicants
  • TOPPAN PRINTING CO., LTD. [JP]/[JP]
Inventors
  • TAKAHASHI, Susumu
  • TODA, Toshiki
  • NAGANO, Akira
Agents
  • SUZUYE, Takehiko
Priority Data
2000-26443831.08.2000JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) OPTICAL SHEET USING DIFFRACTION GRATING, AND DISPLAY DEVICE USING THE OPTICAL SHEET
(FR) FEUILLE OPTIQUE UTILISANT UN RESEAU DE DIFFRACTION ET UNITE D'AFFICHAGE UTILISANT CETTE FEUILLE OPTIQUE
Abstract
(EN)
A light diffusing sheet, comprising diffraction grating cells, having a plurality of curved grids of a same shape in the relation of being moved parallel with each other, disposed on a plane substrate in a matrix shape, wherein the sheet is manufactured by embossing an original plate having the grids formed therein by etching a light sensitive material by an electron beam step-and-repeat equipment, and a reflection layer is provided thereon, whereby, when a light beam is applied to the sheet from a diagonal upper side, high intensity diffraction light beams are emitted in a specified direction.
(FR)
L'invention concerne une feuille de diffusion de lumière comprenant des cellules de réseau de diffraction ainsi qu'une pluralité de grilles incurvées de forme identique disposées les unes par rapport aux autres de façon à être déplacées en parallèle. Cette feuille de diffusion est disposée sur un substrat plan dans une forme de matrice, ladite feuille étant fabriquée par estampage d'une plaque originale sur laquelle les grilles sont formées par gravure d'un matériau photosensible au moyen d'un dispositif à photorépétition utilisant un faisceau électronique. Une couche de réflexion est appliquée sur cette feuille. Ainsi, lorsqu'un faisceau lumineux est appliqué diagonalement sur cette feuille à partir d'un côté supérieur, des faisceaux lumineux de diffraction à intensité élevée sont émis dans un sens spécifié.
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