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Class 348/751 - Liquid crystal


Subclass of Class 348 - Television
Definition: Subject matter wherein the modulator comprises a medium
No. of patents: 154
Last issue date: 09/28/2010


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NumberTitleIssue Date
7804547Liquid crystal display device
A liquid crystal display device includes a liquid crystal display panel, a backlight which illuminates the liquid crystal display panel, and a display control circuit which controls the liquid crystal display panel and the illumination light source. The display cont...
09/28/2010
7429111Two-panel color management system
The invention provides a two-panel color management system for projection display applications, wherein color sequencing is accomplished using achromatic beam switching and static color separation. In a preferred embodiment, a liquid-crystal polarization switch alte...
09/30/2008
7391568Luminous intensity distribution control device and display having the same
A liquid crystal display apparatus including: a liquid crystal display element having a liquid crystal layer; a backlight apparatus arranged at one side of the couple of substrates of the liquid crystal display element; a polarizer arranged between the liquid crysta...
06/24/2008
7336289Projection type display apparatus
A projection type display apparatus that projects video onto a screen includes a liquid crystal panel using polymer-dispersed liquid crystal that disperses light when a voltage is applied and that transmits light when a voltage is not applied, being attached to an a...
02/26/2008
7327408Illuminator that generates linearly polarized light for microdisplay based light engine
A hollow sphere with a scattering (e.g., white diffusive) interior surface directs light input from at least one input light source to an exit. In one embodiment, an internal hot mirror and phosphor are positioned to intercept the input light on which visible light ...
02/05/2008
7324279Dual modulator projection system
A three dimensional display system 100 using two spatial light modulators and a single projection path. Light source 102 emits a white light beam 104 which typically is focused onto an aperture of a recycling integrator 106. The light bea...
01/29/2008
7320521Optical engine architectures
An optical engine architecture that operates as either a two-imager or a three-imager optical engine. The optical engine uses a first PBS cube and a second PBS cube having an optical axis between them. In between the first PBS cube and second PBS cube are two quarte...
01/22/2008
7321464Electroluminescent light source and display incorporating same
A brightness enhanced reflective polarizer includes a reflective polarizer and a structured surface material. ...
01/22/2008
7304629Video information display system and display apparatus applicable to the same
A display apparatus includes a plurality of display systems each having a light source, a reflection type liquid crystal panel and an optical system, a screen displaying superimposingly the images obtained from the plurality of display systems, and a selector for se...
12/04/2007
7293880Light source including multiple light emitting devices driven by a control device, and projector
Aspects of the invention can provide a light source that can reduce the optical system in size while enlarging a color reproducible range and achieving higher luminance. The system can include a cross dichroic prism to combine an R light, a G1 light, a G
11/13/2007
7241014Microdisplay projection
Methods and apparatus for forming two orthogonally polarized beams of light from an unpolarized beam of light using one of at least two different image modes, the forming includes a color filtering process that is based on the image mode being used, and projecting t...
07/10/2007
7233342Time and voltage gradation driven display device
To provide a display device which is capable of multi-gradation display without complicating the structure of a D/A converter circuit. Of m bit digital video data inputted from the external, upper n bit data is used as voltage gradation information and lower (m−n)...
06/19/2007
7220002Color separation and synthesis systems, color separation systems and color synthesis systems, illumination optical systems, projection optical systems, and projection display devices using these systems
Color separation and synthesis systems, color separation systems and color synthesis systems, illumination optical systems, projection optical systems, and projection display devices using these systems include a wavelength-splitting element that reflects linearly p...
05/22/2007
7213922Projector
Aspects of the invention provide a projector capable of comparatively easily achieving a contrast ratio higher than the original contrast ratio of the liquid-crystal light valve by a simple mechanism. The illumination light modulated by liquid-crystal light valves, ...
05/08/2007
7198376Illumination optical unit liquid crystal projector and production method of liquid crystal projector
A lighting optical unit having an optical system for irradiating light from a light-source lamp on a predetermined object in a uniform and/or convergent manner includes a reflector for reflecting light from the light-source lamp to provide converged light and an opt...
04/03/2007
7193594Display device
An object of the present invention is to provide a display device which enables multi-gray scale display without complicating the structure of D/A converter circuit. The measure taken to achieve the object is to use n bit of information among m bit digital vi...
03/20/2007
7190519Plate-like polarizing element, a polarizing conversion unit provided with the element, and a projector provided with the unit
This specification discloses a polarizing. element for dividing light into first and second polarized lights differing in polarized state from each other by a polarizing dividing surface, directing the first polarized light in a first direction, reflecting the secon...
03/13/2007
7185989Color separation device, imaging optical engine, and projection apparatus
A color separation device according to the present invention comprises a first color separation member having a first polarization direction changing element and a second polarization direction changing element, and a first polarization separation element, and a sec...
03/06/2007
7175281Method and apparatus to increase the contrast ratio of the image produced by a LCoS based light engine
A transmissive LCD is placed in optical series with pixels of an image. The transmissive LCD is set to full transmissivity when bright pixels of the image pass through the transmissive LCD. Transmissivity is decreased where pixels darker than a darkening threshold p...
02/13/2007
7173760Luminous intensity distribution control device and display having the same
A liquid crystal display apparatus including: a liquid crystal display element having a liquid crystal layer between a couple of substrates; a backlight apparatus arranged at one side of the couple of substrates; a polarizer arranged between the liquid crystal displ...
02/06/2007
7161573Liquid crystal display unit and method for driving the same
In a method for driving a liquid crystal display apparatus in which in each field, scan lines are successively scanned in order to display an image, the scanning sequence or the polarity of a signal voltage is reversed between a first field and a second field. A liq...
01/09/2007
7154527Optical device
Stereoscopic device including at least two apertures, each including a light valve, a multi wavelength light sensor array and a controllable multi wavelength illumination unit, producing at least two alternating beams of light, each of the beams of light is characte...
12/26/2006
7149033UV visual light beam combiner
An improved light beam combiner is disclosed that creates a more uniform light source across the UV, Visual, and NIR range. It is an optical mechanical device made up of a standard high low dielectric thin film which, when placed at a 45 degree angle between a Deute...
12/12/2006
7145536Liquid crystal display device
An object of the present invention is to provide a small-sized active matrix type liquid crystal display device that may achieve large-sized display, high precision, high resolution and multi-gray scales. According to the present invention, gray scale display...
12/05/2006
7136035Projection type display, a display and a drive method thereof
A projection type display is provided that can change a quantity of light emitted to a light modulation device without changing the intensity of light emission from a lamp and exhibits superiority in an image expression and adaptability to an operational environment...
11/14/2006
7126156Thin film transistor display device with integral control circuitry
A semiconductor device includes a control circuit for carrying out gamma correction of a supplied signal, and a memory for storing data used in the gamma correction. The control circuit and the memory are constituted by TFTs, and are integrally formed on the same in...
10/24/2006
7123311Projector with a micro lens array
The present invention is a projector provided with a light source, a color separating optical system for separating the light from the light source into three colored light beams of red, green and blue, a liquid crystal panel for the red color for modulating the red...
10/17/2006
7121668Device and method for generating an image for projection
In an image projection device, interferences between the light source and the light modulator leading to visible interferences in the projected image are suppressed by an interference cancellation circuit that pre-corrects the control signal that includes the image ...
10/17/2006
7116352Capsule
System for producing a stereoscopic image of an object, and displaying the stereoscopic image, the system including a capsule and a control unit, the capsule including a sensor assembly, a processor connected to the sensor assembly, a capsule transceiver connected t...
10/03/2006
7104652Image display device and projector
To provide an image display device and a projector having a brightness or an excellent utilization efficiency of the light by improving the display performance of a moving picture. A projector includes a light source for emitting illumination light, a liquid crystal...
09/12/2006
7102822High efficiency electromagnetic beam projector, and systems and methods for implementation thereof
This invention relates to electromagnetic wave beam paths, formation of the beam, illumination of programmable electromagnetic wave field vector orientation rotating devices (“PEMFVORD”) with an electromagnetic beam, and the technique of projection of the modula...
09/05/2006
7097306Projection device and liquid crystal panel unit for use in the projection device
A projection device includes on a chassis a liquid crystal panel for irradiation with light from a light source, a polarizing plate opposing the liquid crystal panel, and an optical compensation sheet provided between the liquid crystal panel and the polarizing plat...
08/29/2006
7091942Electrooptic device and driving method thereof
The invention provides an electro-optical apparatus with an enhanced visibility of image in the peripheral region of the active display area, and a method of driving such an electro-optical apparatus. The apparatus includes a mask signal generating circuit that cons...
08/15/2006
7086740Injection-molded vent screens
A projection device is provided, wherein the projection device includes a casing, a plurality of electronic components mounted within the casing, a vent in the casing disposed substantially adjacent to an electronic component, and an injection molded, electrically n...
08/08/2006
7088321Method and apparatus for driving LED light sources for a projection display
A circuit is provided to drive LEDs or diode lasers that emit light in desired wavelengths, such as the primary colors red, green, and blue, which serve as the light source for a projection display system. A display controller controls one or more series-parallel ar...
08/08/2006
7072000Projection type color image display unit
In a projection type color display unit having three optical shutters formed on substrates corresponding to three primary colors, a color separation circuit and a digitalizing circuit are provided on each substrate having the optical shutter, and signals correspondi...
07/04/2006
7059523Scan line alignment in raster pattern
A lightweight, compact image projection module, especially for mounting in a housing having a light-transmissive window, is operative for causing selected pixels in a raster pattern to be illuminated to produce an image of high resolution of VGA quality in color. A ...
06/13/2006
7057819High contrast tilting ribbon blazed grating
The light modulator includes elongated elements and a support structure coupled to the elongated elements. Each element includes one or more lengthwise slits within an active optical area, and a light reflective planar surface with the light reflective planar surfac...
06/06/2006
7057580Methods for forming/recording extremely high resolution and 3D images and devices for same
A system and method for forming an optical image having a screen on which is displayed an image which is to be reproduced on an image display plane. The image on the screen is optically transmitted in the form of a plurality of blocks to the image display plane and ...
06/06/2006
7052143Projection device having blower and/or lamp with feedback control
In one example, a method for controlling temperature in a projection device, comprises measuring a plurality of temperatures in the projection device; averaging said plurality of temperatures to determine an averaged temperature; determining an error between a set-p...
05/30/2006
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