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1. (WO1998052093) LAMINATED PHASE PLATE AND LIQUID CRYSTAL DISPLAY COMPRISING THE PLATE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/052093 International Application No.: PCT/JP1998/001925
Publication Date: 19.11.1998 International Filing Date: 24.04.1998
Chapter 2 Demand Filed: 03.08.1998
IPC:
G02B 5/30 (2006.01) ,G02F 1/1334 (2006.01) ,G02F 1/1335 (2006.01) ,G02F 1/13363 (2006.01)
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5
Optical elements other than lenses
30
Polarising elements
G PHYSICS
02
OPTICS
F
DEVICES 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
1
Devices 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
01
for the control of the intensity, phase, polarisation or colour
13
based on liquid crystals, e.g. single liquid crystal display cells
133
Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
1333
Constructional arrangements
1334
based on polymer-dispersed liquid crystals, e.g. microencapsulated liquid crystals
G PHYSICS
02
OPTICS
F
DEVICES 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
1
Devices 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
01
for the control of the intensity, phase, polarisation or colour
13
based on liquid crystals, e.g. single liquid crystal display cells
133
Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
1333
Constructional arrangements
1335
Structural association of optical devices, e.g. polarisers, reflectors, with the cell
[IPC code unknown for ERROR IPC Code incorrect: invalid subgroup (0=>999999)!]
Applicants:
SHARP KABUSHIKI KAISHA [JP/JP]; 22-22, Nagaike-cho Abeno-ku Osaka-shi Osaka 545-8522, JP (AT, BE, CA, CH, CN, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, JP, KR, LU, MC, NL, PT, SE, SG)
OKAMOTO, Masayuki [JP/JP]; JP (UsOnly)
MITSUI, Seiichi [JP/JP]; JP (UsOnly)
HIRAKI, Hajime [JP/JP]; JP (UsOnly)
UEKI, Shun [JP/JP]; JP (UsOnly)
MINOURA, Kiyoshi [JP/JP]; JP (UsOnly)
Inventors:
OKAMOTO, Masayuki; JP
MITSUI, Seiichi; JP
HIRAKI, Hajime; JP
UEKI, Shun; JP
MINOURA, Kiyoshi; JP
Agent:
HARA, Kenzo; Harakenzo Patent Law Firm Daiwa Minamimorimachi Building 2-6, Tenjinbashi 2-chome Kita Kita-ku, Osaka-shi Osaka 530-0041, JP
Priority Data:
9/11940009.05.1997JP
Title (EN) LAMINATED PHASE PLATE AND LIQUID CRYSTAL DISPLAY COMPRISING THE PLATE
(FR) PANNEAU DE MISE EN PHASE STRATIFIE ET AFFICHEUR A CRISTAUX LIQUIDES COMPRENANT LEDIT PANNEAU
Abstract:
(EN) A laminated phase plate composed of first and second optical phase difference compensation plates (1 and 2). The retardation of the first optical phase difference compensation plate (1) for a transmitted light with a wavelength of 550 nm is 100 - 180 nm. The retardation of the second optical phase difference compensation plate (2) for a transmitted light with a wavelength of 550 nm is 200 - 360 nm. The plates (1 and 2) are so arranged that the value of |$g(u)1 - 2 X $g(u)2| will range from 80 to 100 degrees wherein $g(u)1 denotes an angle between the vibration direction (4) of a linearly polarized light (3) which is visible light and has the same plane of vibration and the slow axis direction of the first optical phase difference compensation plate (1) when the linearly polarized light (3) enters the second optical phase difference compensation plate (2), and $g(u)2 denotes an angle between the vibration direction of the linearly polarized light (3) entering the second optical phase compensation plate (2) and the slow axis direction of the second optical phase difference compensation plate (2). Thus a laminated phase plate with an improved function is provided realizing a reflection liquid crystal display which has an excellent visibility or a projection liquid crystal display which has a high efficiency.
(FR) L'invention a pour objet un panneau de mise en phase stratifié constitué d'un premier et d'un deuxième panneaux (1 et 2) de compensation de différence des phases optiques. Le retard optique du premier panneau (1) de compensation de différence des phases optiques est de 100 à 180 nm pour une lumière transmise ayant une longueur d'onde de 550 nm. Le retard optique du deuxième panneau (2) de compensation de différence des phases optiques est de 200 à 360 nm pour une lumière transmise ayant une longueur d'onde de 550 nm. Les panneaux (1 et 2) sont disposés de façon que la valeur de |$g(u) 1 - 2 x $g(u)2| soit comprise entre 80 et 100 degrés, $g(u) 1 désignant un angle entre la direction de vibration (4) d'une lumière à polarisation rectiligne (3), qui est une lumière visible ayant les mêmes plan de vibration et direction de l'axe lent, du premier panneau (1) de compensation de différence des phases optiques lorsque la lumière à polarisation rectiligne (3) pénètre dans le deuxième panneau (1) de compensation de différence des phases optiques, $g(u) 2 désignant un angle entre la direction de vibration d'une lumière à polarisation rectiligne (3) pénètrant dans le deuxième panneau (2) de compensation de différence des phases optiques et la direction de l'axe lent du deuxième panneau (2) de compensation de différence des phases optiques. L'invention permet d'obtenir un panneau de mise en phase stratifié avec une fonction améliorée et de mettre en oeuvre un afficheur réflectif à cristaux liquides qui offre une excellente visibilité ou un afficheur de projection à cristaux liquides à efficacité élevée.
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Designated States: CA, CN, JP, KR, SG, US
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)
Also published as:
KR1020010012224EP0989441US20020063826JP3445284CN1261961