US Patent No: 5,013,141

Number of patents in Portfolio can not be more than 2000

Liquid crystal light modulation device

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Abstract

A functional optical element has at least one diffraction grating in which first and second elements are alternately arranged. At least one of the first and second elements comprises an optically anisotropic substance and the adjacent elements are substantially different from each other. This diffraction grating is so disposed that the arrayed surface of the diffraction grating is located in the path of the incident light beam. The functional optical device is characterized in that an incident light beam having an arbitrary polarization characteristic is functioned as a plurality of light beams which are polarized in the different directions, so that at least part of the incident light beam is subjected to the diffraction effect. The optical condition of at least one of the first and second elements may be varied by a control device.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
CANON KABUSHIKI KAISHATOKYO49710

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Sakata, Hajime Hamamatsu, JP 47 913

Cited Art

Patent Info (Count) # Cites Year
 
CANON KABUSHIKI KAISHA (3)
4,729,640 Liquid crystal light modulation device 68 1985
4,822,146 Optical modulation element 16 1987
4,850,681 Optical modulation device 38 1987
 
U.S. PHILIPS CORPORATION (2)
4,362,359 Coupling device for coupling signals into and out of a transmission glass-fiber 36 1980
4,536,059 Liquid crystal display device with ridges 12 1982
 
OEP IMAGING OPERATING CORPORATION (1)
4,674,840 Liquid crystal display with polarizer and biaxial birefringent support 17 1983
 
RCA CORPORATION (1)
4,251,137 Tunable diffractive subtractive filter 39 1978
 
TEXAS INSTRUMENTS INCORPORATED (1)
4,228,574 Automated liquid crystal display process 27 1979
 
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY (1)
4,243,300 Large aperture phased element modulator/antenna 15 1978
 
WEBER, SALLY (1)
4,850,682 Diffraction grating structures 57 1986
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
4,367,924 Chiral smectic C or H liquid crystal electro-optical device 480 1980

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
SILICON LIGHT MACHINES CORPORATION (45)
5,982,553 Display device incorporating one-dimensional grating light-valve array 334 1997
6,088,102 Display apparatus including grating light-valve array and interferometric optical system 125 1997
6,271,808 Stereo head mounted display using a single display device 52 1998
6,130,770 Electron gun activated grating light valve 72 1998
6,101,036 Embossed diffraction grating alone and in combination with changeable image display 67 1998
6,215,579 Method and apparatus for modulating an incident light beam for forming a two-dimensional image 106 1998
6,956,878 Method and apparatus for reducing laser speckle using polarization averaging 24 2000
7,177,081 High contrast grating light valve type device 5 2001
6,764,875 Method of and apparatus for sealing an hermetic lid to a semiconductor die 24 2001
6,865,346 Fiber optic transceiver 4 2001
6,747,781 Method, apparatus, and diffuser for reducing laser speckle 59 2001
6,829,092 Blazed grating light valve 11 2001
6,707,591 Angled illumination for a single order light modulator based projection system 4 2001
6,800,238 Method for domain patterning in low coercive field ferroelectrics 1 2002
6,782,205 Method and apparatus for dynamic equalization in wavelength division multiplexing 60 2002
6,991,953 Microelectronic mechanical system and methods 9 2002
6,767,751 Integrated driver process flow 3 2002
6,728,023 Optical device arrays with optimized image resolution 17 2002
7,054,515 Diffractive light modulator-based dynamic equalizer with integrated spectral monitor 1 2002
6,822,797 Light modulator structure for producing high-contrast operation using zero-order light 5 2002
6,872,984 Method of sealing a hermetic lid to a semiconductor die at an angle 18 2002
6,829,258 Rapidly tunable external cavity laser 27 2002
6,908,201 Micro-support structures 2 2002
6,813,059 Reduced formation of asperities in contact micro-structures 65 2002
6,714,337 Method and device for modulating a light beam and having an improved gamma response 8 2002
7,057,795 Micro-structures with individually addressable ribbon pairs 1 2002
6,801,354 2-D diffraction grating for substantially eliminating polarization dependent losses 10 2002
6,956,995 Optical communication arrangement 2 2002
6,712,480 Controlled curvature of stressed micro-structures 6 2002
7,049,164 Microelectronic mechanical system and methods 49 2002
6,928,207 Apparatus for selectively blocking WDM channels 1 2002
7,057,819 High contrast tilting ribbon blazed grating 1 2002
6,987,600 Arbitrary phase profile for better equalization in dynamic gain equalizer 0 2002
6,934,070 Chirped optical MEM device 3 2002
6,927,891 Tilt-able grating plane for improved crosstalk in 1×N blaze switches 3 2002
7,068,372 MEMS interferometer-based reconfigurable optical add-and-drop multiplexor 4 2003
7,286,764 Reconfigurable modulator-based optical add-and-drop multiplexer 2 2003
6,947,613 Wavelength selective switch and equalizer 1 2003
6,922,272 Method and apparatus for leveling thermal stress variations in multi-layer MEMS devices 5 2003
7,391,973 Two-stage gain equalizer 0 2003
7,027,202 Silicon substrate as a light modulator sacrificial layer 52 2003
6,922,273 PDL mitigation structure for diffractive MEMS and gratings 2 2003
6,829,077 Diffractive light modulator with dynamically rotatable diffraction plane 2 2003
6,806,997 Patterned diffractive light modulator ribbon for PDL reduction 1 2003
7,042,611 Pre-deflected bias ribbons 0 2003
 
CANON KABUSHIKI KAISHA (7)
5,237,435 Multicolor projector employing diffraction grating type liquid crystal light modulators 107 1991
5,333,021 Projector provided with a plurality of image generators 11 1991
5,299,037 Diffraction grating type liquid crystal display device in viewfinder 67 1993
5,631,750 Scattering type liquid crystal device 14 1994
6,054,971 Display apparatus 5 1994
6,122,107 Angular integrator 3 1999
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SHARP KABUSHIKI KAISHA (5)
5,872,611 Liquid crystal display having two or more spacings between electrodes 76 1997
6,091,463 Diffractive spatial light modulator 12 1998
5,953,093 Liquid crystal display having two or more spacings between electrodes 60 1998
6,141,077 Liquid crystal display including pixel electrode(s) designed to improve viewing characteristics 46 1999
6,342,939 Liquid crystal display including pixel electrode (S) designed to improve viewing characteristics 34 2000
 
INTEL CORPORATION (4)
6,678,078 Optical filter employing holographic optical elements and image generating system incorporating the optical filter 12 2000
6,507,419 Illumination system using optical feedback 1 2000
6,504,629 Method and apparatus for illuminating a display 2 2000
6,211,976 Holographic projection system 102 2000
 
HOYA CORPORATION (3)
6,421,109 Method and system for display resolution multiplication 12 1999
6,339,486 Holographic technique for illumination of image displays using ambient illumination 3 1999
6,424,437 Projection display employing switchable holographic optical elements 2 2000
 
ASAHI GLASS COMPANY, LIMITED (2)
6,304,312 Optical head, method of manufacturing the same, and diffraction element suitable therefor 5 1998
7,835,252 Optical head apparatus 0 2007
 
MASSACHUSETTS INSTITUTE OF TECHNOLOGY (2)
5,742,373 Color microdisplays and methods of manufacturing same 55 1995
5,940,159 Color microdisplays and methods of manufacturing same 9 1998
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (2)
5,193,130 Light deflecting device 9 1990
5,299,289 Polymer dispersed liquid crystal panel with diffraction grating 133 1992
 
U.S. PHILIPS CORPORATION (2)
6,014,197 Electro-optical device wherein orientation layers have grating structure and comprises birefringent material with refractive indices equal to electro-optic medium 12 1996
5,930,044 Deflecting element having a switchable liquid crystalline material 9 1998
 
BOE-HYDIS TECHNOLOGY CO., LTD. (1)
6,480,252 Liquid crystal display having uneven convex and concave portions in both pixel and common electrodes 0 2000
 
CALIFORNIA INSTITUTE OF TECHNOLOGY (1)
6,587,180 Adjustable liquid crystal blazed grating deflector 12 2001
 
CITIZEN FINETECH MIYOTA CO., LTD. (1)
5,552,916 Diffractive light modulator 35 1993
 
ENPLAS CORPORATION (1)
6,275,338 Light regulation device 23 1997
 
GETNER FOUNDATION LLC (1)
5,844,652 Liquid crystal display using a liquid crystal showing a ferroelectric property or an anti-ferroelectric property 9 1996
 
HANNSTAR DISPLAY CORP. (1)
7,311,951 Phoretic display 1 2004
 
IBSEN PHOTONICS A/S (1)
6,762,880 Grating structures and methods of making the grating structures 7 2001
 
LOCKHEED MARTIN CORPORATION (1)
5,107,357 Low insertion loss optical beam steerer 5 1991
 
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6,447,690 Methods for fabricating stepped etalons 1 2000
 
MICRON TECHNOLOGY, INC. (1)
5,182,665 Diffractive light modulator 136 1990
 
RETINAL DISPLAYS, INC. (1)
6,407,724 Method of and apparatus for viewing an image 30 1998
 
RICOH COMPANY, LTD. (1)
5,278,817 Optical pick-up for use with an opto-magnetic signal 11 1992
 
SAMSUNG DISPLAY CO., LTD. (1)
7,084,565 Assembly of organic electroluminescence display device 12 2004
 
SEMICONDUCTOR ENERGY LABORATORY CO., LTD. (1)
5,539,548 Electro-optical device with laminated layers of liquid crystal an light scattering support layers 10 1994
 
XEROX CORPORATION (1)
5,537,252 Double blazed binary diffraction optical element beam splitter 4 1993
 
ZBD DISPLAYS LIMITED (1)
5,724,113 Liquid crystal device alignment layer having an asymmetric profile grating on its surface 4 1996