US Patent No: 4,389,096

Number of patents in Portfolio can not be more than 2000

Image display apparatus of liquid crystal valve projection type

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Abstract

A liquid crystal light valve projection type image display apparatus comprises an electro-optic element and a Schlieren optical system. The electro-optic element has a liquid crystal layer having a dielectric and optical anisotropy. An electric field having a spatial intensity distribution according to an image signal is applied to said liquid crystal at a spatial period, so that a spatially phase-modulated phase diffraction grating is formed in the liquid crystal layer. Thus, a projected image in enlarged form is obtained. The fact that the electric field with a spatial period is applied to the liquid crystal leads to a constant light diffraction angle, and the modulation of the diffraction light intensity in the applied electric field enables an image corresponding to the input image signal to be projected at high light utilization.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.OSAKA27275

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Asai, Komei Hirakata, JP 1 270
Fukai, Masakazu Nishinomiya, JP 7 395
Hori, Yoshikazu Osaka, JP 35 694

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Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
QUALCOMM MEMS TECHNOLOGIES, INC. (177)
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6,040,937 Interferometric modulation 571 1996
5,986,796 Visible spectrum modulator arrays 444 1996
6,674,562 Interferometric modulation of radiation 593 1998
6,055,090 Interferometric modulation 423 1999
7,123,216 Photonic MEMS and structures 480 1999
7,138,984 Directly laminated touch sensitive screen 89 2001
6,867,896 Interferometric modulation of radiation 364 2001
6,680,792 Interferometric modulation of radiation 455 2001
6,650,455 Photonic mems and structures 453 2001
6,710,908 Controlling micro-electro-mechanical cavities 306 2002
7,042,643 Interferometric modulation of radiation 155 2002
7,126,738 Visible spectrum modulator arrays 116 2002
7,110,158 Photonic MEMS and structures 157 2002
7,550,794 Micromechanical systems device comprising a displaceable electrode and a charge-trapping layer 20 2002
7,297,471 Method for manufacturing an array of interferometric modulators 17 2003
7,221,495 Thin film precursor stack for MEMS manufacturing 93 2003
7,460,291 Separable modulator 42 2003
7,012,726 MEMS devices with unreleased thin film components 65 2003
7,198,973 Method for fabricating an interference display unit 89 2003
7,161,728 Area array modulation and lead reduction in interferometric modulators 128 2003
7,692,844 Interferometric modulation of radiation 10 2004
7,532,194 Driver voltage adjuster 3 2004
7,119,945 Altering temporal response of microelectromechanical elements 119 2004
7,706,050 Integrated modulator illumination 27 2004
7,193,768 Interference display cell 22 2004
7,291,921 Structure of a micro electro mechanical system and the manufacturing method thereof 25 2004
7,476,327 Method of manufacture for microelectromechanical devices 29 2004
7,060,895 Modifying the electro-mechanical behavior of devices 38 2004
7,280,265 Interferometric modulation of radiation 40 2004
7,164,520 Packaging for an interferometric modulator 30 2004
7,250,315 Method for fabricating a structure for a microelectromechanical system (MEMS) device 44 2004
7,855,824 Method and system for color optimization in a display 15 2005
7,893,919 Display region architectures 2 2005
7,813,026 System and method of reducing color shift in a display 10 2005
7,424,198 Method and device for packaging a substrate 2 2005
7,710,632 Display device having an array of spatial light modulators with integrated color filters 22 2005
7,626,751 Display device having an array of spatial light modulators with integrated color filters 0 2005
7,379,227 Method and device for modulating light 10 2005
7,355,780 System and method of illuminating interferometric modulators using backlighting 35 2005
7,289,259 Conductive bus structure for interferometric modulator array 55 2005
7,460,246 Method and system for sensing light using interferometric elements 8 2005
7,012,732 Method and device for modulating light with a time-varying signal 53 2005
7,359,066 Electro-optical measurement of hysteresis in interferometric modulators 6 2005
7,701,631 Device having patterned spacers for backplates and method of making the same 2 2005
7,928,928 Apparatus and method for reducing perceived color shift 4 2005
7,259,449 Method and system for sealing a substrate 11 2005
7,781,850 Controlling electromechanical behavior of structures within a microelectromechanical systems device 3 2005
7,668,415 Method and device for providing electronic circuitry on a backplate 5 2005
7,429,334 Methods of fabricating interferometric modulators by selectively removing a material 12 2005
7,420,728 Methods of fabricating interferometric modulators by selectively removing a material 15 2005
7,405,924 System and method for protecting microelectromechanical systems array using structurally reinforced back-plate 7 2005
7,368,803 System and method for protecting microelectromechanical systems array using back-plate with non-flat portion 7 2005
7,299,681 Method and system for detecting leak in electronic devices 1 2005
7,920,135 Method and system for driving a bi-stable display 2 2005
7,586,484 Controller and driver features for bi-stable display 11 2005
7,535,466 System with server based control of client device display features 5 2005
7,302,157 System and method for multi-level brightness in interferometric modulation 37 2005
7,289,256 Electrical characterization of interferometric modulators 10 2005
7,916,103 System and method for display device with end-of-life phenomena 1 2005
7,321,456 Method and device for corner interferometric modulation 32 2005
7,372,613 Method and device for multistate interferometric light modulation 63 2005
8,362,987 Method and device for manipulating color in a display 0 2005
7,692,839 System and method of providing MEMS device with anti-stiction coating 1 2005
7,420,725 Device having a conductive light absorbing mask and method for fabricating same 29 2005
7,405,861 Method and device for protecting interferometric modulators from electrostatic discharge 3 2005
7,719,500 Reflective display pixels arranged in non-rectangular arrays 26 2005
7,547,565 Method of manufacturing optical interference color display 12 2005
7,527,995 Method of making prestructure for MEMS systems 20 2005
7,808,703 System and method for implementation of interferometric modulator displays 2 2005
7,349,136 Method and device for a display having transparent components integrated therein 7 2005
RE42119 Microelectrochemical systems device and method for fabricating same 4 2005
8,008,736 Analog interferometric modulator device 0 2005
7,710,629 System and method for display device with reinforcing substance 3 2005
8,124,434 Method and system for packaging a display 0 2005
7,554,714 Device and method for manipulation of thermal response in a modulator 18 2005
7,130,104 Methods and devices for inhibiting tilting of a mirror in an interferometric modulator 53 2005
7,553,684 Method of fabricating interferometric devices using lift-off processing techniques 6 2005
7,417,783 Mirror and mirror layer for optical modulator and method 7 2005
7,373,026 MEMS device fabricated on a pre-patterned substrate 12 2005
7,343,080 System and method of testing humidity in a sealed MEMS device 8 2005
RE40436 Hermetic seal and method to create the same 7 2005
7,304,784 Reflective display device having viewable display on both sides 32 2005
7,161,730 System and method for providing thermal compensation for an interferometric modulator display 78 2005
7,567,373 System and method for micro-electromechanical operation of an interferometric modulator 19 2005
7,936,497 MEMS device having deformable membrane characterized by mechanical persistence 0 2005
7,463,421 Method and device for modulating light 15 2005
7,317,568 System and method of implementation of interferometric modulators for display mirrors 1 2005
7,492,502 Method of fabricating a free-standing microstructure 11 2005
7,417,735 Systems and methods for measuring color and contrast in specular reflective devices 23 2005
7,369,296 Device and method for modifying actuation voltage thresholds of a deformable membrane in an interferometric modulator 14 2005
7,630,119 Apparatus and method for reducing slippage between structures in an interferometric modulator 10 2005
7,911,428 Method and device for manipulating color in a display 13 2005
7,807,488 Display element having filter material diffused in a substrate of the display element 17 2005
7,728,800 Method and device for manipulating color in a display 0 2005
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7,327,510 Process for modifying offset voltage characteristics of an interferometric modulator 142 2005
7,369,294 Ornamental display device 38 2005
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7,898,521 Device and method for wavelength filtering 16 2005
7,782,293 Device and method for wavelength filtering 0 2005
7,653,371 Selectable capacitance circuit 10 2005
7,415,186 Methods for visually inspecting interferometric modulators for defects 3 2005
7,453,579 Measurement of the dynamic characteristics of interferometric modulators 10 2005
7,236,284 Photonic MEMS and structures 82 2005
7,630,114 Diffusion barrier layer for MEMS devices 1 2005
8,014,059 System and method for charge control in a MEMS device 0 2005
7,776,631 MEMS device and method of forming a MEMS device 6 2005
7,618,831 Method of monitoring the manufacture of interferometric modulators 0 2005
7,403,323 Process control monitors for interferometric modulators 1 2005
7,369,252 Process control monitors for interferometric modulators 0 2005
7,259,865 Process control monitors for interferometric modulators 20 2005
7,795,061 Method of creating MEMS device cavities by a non-etching process 1 2005
7,916,980 Interconnect structure for MEMS device 0 2006
7,382,515 Silicon-rich silicon nitrides as etch stops in MEMS manufacture 4 2006
7,582,952 Method for providing and removing discharging interconnect for chip-on-glass output leads and structures thereof 2 2006
7,547,568 Electrical conditioning of MEMS device and insulating layer thereof 6 2006
7,550,810 MEMS device having a layer movable at asymmetric rates 19 2006
7,450,295 Methods for producing MEMS with protective coatings using multi-component sacrificial layers 40 2006
7,483,197 Photonic MEMS and structures 16 2006
7,616,369 Film stack for manufacturing micro-electromechanical systems (MEMS) devices 11 2006
7,532,377 Movable micro-electromechanical device 28 2006
7,643,203 Interferometric optical display system with broadband characteristics 17 2006
7,903,047 Mode indicator for interferometric modulator displays 2 2006
7,711,239 Microelectromechanical device and method utilizing nanoparticles 0 2006
7,623,287 Non-planar surface structures and process for microelectromechanical systems 4 2006
7,527,996 Non-planar surface structures and process for microelectromechanical systems 4 2006
7,417,784 Microelectromechanical device and method utilizing a porous surface 42 2006
8,004,743 Method and apparatus for providing brightness control in an interferometric modulator (IMOD) display 1 2006
7,773,289 Method and apparatus for providing brightness control in an interferometric modulator (IMOD) display 0 2006
7,706,044 Optical interference display cell and method of making the same 8 2006
7,880,954 Integrated modulator illumination 14 2006
7,369,292 Electrode and interconnect materials for MEMS devices 13 2006
7,349,139 System and method of illuminating interferometric modulators using backlighting 15 2006
7,848,001 Method and system for interferometric modulation in projection or peripheral devices 4 2006
7,907,319 Method and device for modulating light with optical compensation 19 2006
7,161,094 Modifying the electro-mechanical behavior of devices 17 2006
7,372,619 Display device having a movable structure for modulating light and method thereof 74 2006
7,649,671 Analog interferometric modulator device with electrostatic actuation and release 7 2006
7,405,863 Patterning of mechanical layer in MEMS to reduce stresses at supports 3 2006
7,321,457 Process and structure for fabrication of MEMS device having isolated edge posts 60 2006
7,187,489 Photonic MEMS and structures 73 2006
7,636,151 System and method for providing residual stress test structures 0 2006
7,471,442 Method and apparatus for low range bit depth enhancements for MEMS display architectures 4 2006
7,835,061 Support structures for free-standing electromechanical devices 4 2006
7,385,744 Support structure for free-standing MEMS device and methods for forming the same 42 2006
7,527,998 Method of manufacturing MEMS devices providing air gap control 10 2006
7,388,704 Determination of interferometric modulator mirror curvature and airgap variation using digital photographs 3 2006
7,534,640 Support structure for MEMS device and methods therefor 13 2006
7,830,586 Transparent thin films 10 2006
7,554,711 MEMS devices with stiction bumps 30 2006
7,763,546 Methods for reducing surface charges during the manufacture of microelectromechanical systems devices 3 2006
7,566,664 Selective etching of MEMS using gaseous halides and reactive co-etchants 24 2006
7,619,810 Systems and methods of testing micro-electromechanical devices 2 2006
7,385,748 Visible spectrum modulator arrays 26 2006
8,284,474 Method and system for interferometric modulation in projection or peripheral devices 0 2007
8,059,326 Display devices comprising of interferometric modulator and sensor 1 2007
7,738,156 Display devices comprising of interferometric modulator and sensor 0 2007
7,642,110 Method for fabricating a structure for a microelectromechanical systems (MEMS) device 14 2007
7,852,545 Method and device for modulating light 8 2007
7,848,004 System and method for a MEMS device 5 2007
7,830,587 Method and device for modulating light with semiconductor substrate 9 2007
7,826,120 Method and device for multi-color interferometric modulation 8 2007
7,808,694 Method and device for modulating light 8 2007
7,738,157 System and method for a MEMS device 11 2007
7,564,613 Microelectromechanical device and method utilizing a porous surface 2 2007
8,111,445 Spatial light modulator with integrated optical compensation structure 1 2008
7,623,752 System and method of testing humidity in a sealed MEMS device 4 2008
7,570,865 System and method of testing humidity in a sealed MEMS device 1 2008
8,105,496 Method of fabricating MEMS devices (such as IMod) comprising using a gas phase etchant to remove a layer 0 2008
8,045,252 Spatial light modulator with integrated optical compensation structure 1 2008
8,040,588 System and method of illuminating interferometric modulators using backlighting 0 2008
8,193,441 Photovoltaics with interferometric ribbon masks 0 2008
8,416,487 Photonic MEMS and structures 0 2009
8,169,687 Photonic MEMS and structures 0 2009
8,394,656 Method of creating MEMS device cavities by a non-etching process 0 2010
8,416,154 Apparatus and method for reducing perceived color shift 0 2011
 
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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
6,956,878 Method and apparatus for reducing laser speckle using polarization averaging 24 2000
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6,865,346 Fiber optic transceiver 4 2001
6,747,781 Method, apparatus, and diffuser for reducing laser speckle 59 2001
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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
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7,054,515 Diffractive light modulator-based dynamic equalizer with integrated spectral monitor 1 2002
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6,714,337 Method and device for modulating a light beam and having an improved gamma response 8 2002
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6,801,354 2-D diffraction grating for substantially eliminating polarization dependent losses 10 2002
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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
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6,922,272 Method and apparatus for leveling thermal stress variations in multi-layer MEMS devices 5 2003
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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
6,806,997 Patterned diffractive light modulator ribbon for PDL reduction 1 2003
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