Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 8182098 | Projection optical system Provided is a projection optical system. The projection optical system includes: A projection optical system comprising: a first optical part that comprises at least one optical lens, and projects and displays light beams; a second optical part that comprises an ima... | 05/22/2012 |
| 8096662 | Light source unit having reflective wall surfaces and light-emitting elements, and projector utilizing the light source unit A light source unit has a main body portion and light emitting elements, and the main body portion includes wall surfaces which constitute reflecting planes which are inclined so as to define a rectangular projecting port, and an inclination of the wall surfaces lyi... | 01/17/2012 |
| 8092028 | Light source, and image display apparatus, monitoring apparatus, and illumination apparatus using the same A light source that emits light includes light source units, each emitting a plurality of light beams parallel to one another, the plurality of light beams including first and second light beams, and a beam distance adjustment element that is an optical element made... | 01/10/2012 |
| 8094355 | Laser projection system with a spinning polygon for speckle mitigation A laser projection system comprises: (i) a coherent light source including at least one laser configured to emit an output beam carrying signal data; (ii) a scanning optics, the scanning optics comprising at least one scanning reflector, the scanning reflector posit... | 01/10/2012 |
| 8070299 | Light source apparatus and projector having a wavelength separator A light source apparatus includes a light source unit that supplies light having a first wavelength, a wavelength conversion element that converts the light having the first wavelength into the light having a second wavelength different from the first wavelength, an... | 12/06/2011 |
| 8052284 | Projector with reduced size and higher contrast A projector with reduced size and higher contrast includes a prism assembly, a light system, and a Digital Micro-mirror Device (DMD). Only In the “ON” state of DMD, the light from the light system reflects to a projection screen through the prism assembly and th... | 11/08/2011 |
| 8047658 | Methods and systems for multiple primary color display Methods and systems for multiple primary color display are provided. Methods and systems of the present invention improve the spectrum efficiency of a color display system, and provide enhanced brightness and color gamut. In an embodiment, methods and systems of the... | 11/01/2011 |
| 8038305 | Light source unit, illumination device, image display apparatus, and monitor apparatus A light source unit includes: a light source part that supplies light; an optical element that changes an optical path of the light from the light source part; and a wavelength conversion element that converts a wavelength of the light from the optical element. The ... | 10/18/2011 |
| 8025416 | Integrated optical polarization combining prism for projection displays In an embodiment, an optical component is provided. The optical component includes a first polarizing prism having a first face, a second face and a third face. The light beam may be received incident on the first face. Light having a first polarization may be outpu... | 09/27/2011 |
| 7993014 | Prism for high contrast projection Prism elements having TIR surfaces placed in close proximity to the active area of a SLM device to separate unwanted off-state and/or flat-state light from the projection ON-light bundle. The TIR critical angle of these prisms is selected to affect either the off-st... | 08/09/2011 |
| 7972016 | Projector system with combinated light sources A projector system includes a light source module and an integrator including a light receiving surface for receiving light from the light source module. The light source module includes a number of light sources for emitting parallel light, multiple sets of light-a... | 07/05/2011 |
| 7883215 | Projector and projector circuit board thereof One embodiment of the invention discloses projector circuit boards comprising an image receiving terminal, a central processing unit, a motor driving module, a DMD and a DMD control module. The image receiving terminal receives an image signal and transmits the rece... | 02/08/2011 |
| 7878662 | X-prism for use in projector An x-prism provides four triangular prisms each of which includes a hypotenuse side, a first side surface adjoining the hypotenuse side surface, a second side surface perpendicular to the first side surface, a first end surface and an opposite second end surface, th... | 02/01/2011 |
| 7708412 | Light shielding member for a micro-mirror projection system A DLP optical system is provided. The DLP optical system includes a lamp unit, an optical engine unit, a DMD, a prism, a projection lens, and a light-blocking part. The lamp unit provides light, and the optical engine unit is optically connected with the lamp unit, ... | 05/04/2010 |
| 7703928 | Optical projection apparatus An optical projection apparatus is provided, where a reflective light valve, a light deflecting device and a lens set are arranged on an optical path of the light beam providing by an illuminating system. The light deflecting device is located between the illuminati... | 04/27/2010 |
| 7665850 | Prism for high contrast projection Prism elements having TIR surfaces placed in close proximity to the active area of a SLM device to separate unwanted off-state and/or flat-state light from the projection ON-light bundle. The TIR critical angle of these prisms is selected to affect either the off-st... | 02/23/2010 |
| 7641346 | Method 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... | 01/05/2010 |
| 7553032 | Imaging system for an optical engine of a projection apparatus An imaging system for an optical engine of projection apparatus comprises a body, a prism device, a digital micromirror assembly, a projection lens assembly, and an illumination system. A first slide mechanism disposed between the prism device and the body enables t... | 06/30/2009 |
| 7448758 | Illumination unit and projection type image display apparatus employing the same An illumination unit includes first, second, third, and fourth light source units to emit first, second, third, and fourth light beams of different wavelength bands, and a hexahedral color synthesis prism to synthesize the first, second, third, and fourth light beam... | 11/11/2008 |
| 7443594 | Color display device using separate diffracted light and illumination light A display device includes a condenser unit, an illumination lens system, a plurality of diffractive light modulators, a mirror for separating illumination light from diffracted light, a polarized beam separator, a filter unit and a projection unit. The condenser uni... | 10/28/2008 |
| 7429111 | Two-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 |
| 7429110 | Projector-type image display apparatus At least one exemplary embodiment is directed to a projector which includes several optical elements, reflective devices and beam splitters, arranged to reduce back reflection effects. At least one exemplary embodiment includes a mirror, two beam splitters, three re... | 09/30/2008 |
| 7425932 | Projection system featuring light source luminuous flux sensing and compensation A projection system having a projection display (20), at least one light source (10), and a sensor means for sensing and compensating for changes in the luminous flux emitted by the at least one light source (10) is described. The sensor means c... | 09/16/2008 |
| 7419269 | Display device and projector To provide a display device and a projector capable of enhancing the quality of dynamic images, of reducing limitations on light sources, enhancing the utilization efficiency of light, and of displaying images in full color, illumination light emitted from a light s... | 09/02/2008 |
| 7416307 | Optical apparatus and projection apparatus An optical apparatus provided with a light combining prism having three light incident faces, receiving the three beams of light having different wavelength bands through the three light incident faces, and combining the three incident beams of light for output, thr... | 08/26/2008 |
| 7410261 | Multicolor illuminator system In an image projection system, there are at least two light illumination units producing illumination light beams of respective first and second primary colors. A first beamsplitter is disposed to split at least a portion of the first illumination light beam into su... | 08/12/2008 |
| 7407292 | Projector and polarization member used in projector Aspects of the invention can provide a polarization member that can include a reflection type polarization element that transmits, of an incident light, a linear polarization component in a specific direction and reflects components other than the linear polarizatio... | 08/05/2008 |
| 7404643 | Projector having polarization conversion element A projector has an illumination system, an electro-optical modulator, a projection optical system, and a scanning system. The illumination system has a light source, a first lens array, a second lens array, a polarization conversion element and a superposing lens. T... | 07/29/2008 |
| 7401926 | Space light modulating apparatus, projector including same, process for manufacturing microstructure element used in same, and microstructure element manufactured by the same process A space light modulating apparatus includes a modulating unit that modulates incident light based on an image signal including a plurality of pixels and a light-shielding part placed between the pixels, and a refracting unit that refracts modulated light including a... | 07/22/2008 |
| 7403335 | Screen, Fresnel lens sheet used for the same, and image display apparatus using the same The present invention provides a screen suitable for reducing the longitudinal dimension of a set. The present invention includes two prism sections. One is a totally reflective prism section (10) provided at the image generation source side of a Fresnel lens... | 07/22/2008 |
| 7396132 | Prism assembly for use in optical devices and projector comprising such a prism assembly A prism assembly for use in optical devices, which includes a total internal reflection (TIR) assembly for redirecting an incoming lightbeam, a color prism assembly for splitting the incoming lightbeam into spectral bands, and at least one reflection light valve for... | 07/08/2008 |
| 7394597 | SLM projection display with series DMD illuminator The addition of DMD illumination modulator(s) 702 in series with projection SLM(s) 706/709 to produce high-performance projection displays with improved optical efficiency, reliability, and lower maintenance requirements. This approach eliminates the v... | 07/01/2008 |
| 7390094 | Method and apparatus to achieve a neutral dark state in image projection systems An absorptive layer is added to an image display system. The absorptive layer is selected to compensate for tint in a black state of a displayed image. In a Liquid Crystal On Silicon (LCOS) based light engine, blue wavelengths may cause a predominate tint in black p... | 06/24/2008 |
| 7387391 | Apparatus and method for mounting imagers on stress-sensitive polarizing beam splitters An optical device that includes an optical element, an imager, and a prism bracket. The optical element includes an optical element having first and second prisms coupled together. The imager is arranged adjacent to the first prism and configured to receive light fr... | 06/17/2008 |
| 7377649 | Projector arrangement A projector arrangement is provided wherein a spectral splitting and recombination unit (SSR) includes a first and a second polarization selective or polarizing beam splitting device and a wavelength selective optical element (WSOE) which are sufficient to realize t... | 05/27/2008 |
| 7369318 | Color display device having single illuminating system A display device is disclosed herein. The display device includes a condenser unit, an illumination lens system, an optical modulation system, a filter system and a projection system. The condenser unit converges polarized light output from a plurality of light sour... | 05/06/2008 |
| 7364303 | Image display apparatus At least one exemplary embodiment is directed to an image display apparatus, which can include multiple color combining elements, multiple light modulating elements, and a projection optical system, operatively connected to reduce the effects of ghost light. ... | 04/29/2008 |
| 7364302 | Projection display system using multiple light sources and polarizing element for using with same An image projection system has two illumination beams of different colors. A first polarizing beamsplitter (PBS) has first and second input faces. Light of the first color is incident on the first input face and the light of the second color is incident on second in... | 04/29/2008 |
| 7360902 | System and method for light source modulation In one embodiment, a method for modulating light in an image display system includes generating a plurality of light beams. The amount of light beams that are received by a modulator is selectively varied, and the modulated light beams are received at the modulator.... | 04/22/2008 |
| 7360905 | Compact optical engine for very small personal projectors using LED illumination According to various illustrative embodiments of the present invention, a device for a light projection system includes a single light emitting diode array comprising at least one green die, at least one blue die, and at least one red die, a single light collection,... | 04/22/2008 |
