Programmable wavelength router
OF THE DRAWING 1. Overview The preferred implementation of the present invention both demultiplexes (i.e., spectrally separates) and routes (i.e., spatially permutates) a wavelength division multiple... Read More
Inventors: Wu, Kuang-Yi; Liu, Jian-Yu;, Assignee: Chorum Technologies Inc. (Richardson, TX) |
Color selective light modulators employing birefringent stacks
The present invention provides a color selective polarization modulator and a high brightness color filter or display system. Color separation is accomplished with nearly lossless retarder films, prov... Read More
Inventors: Sharp, Gary D.;, Assignee: ColorLink, Inc. (Boulder, CO) |
Liquid crystal devices using a linear electro-optic effect
What is claimed is: 1. A device for influencing light, the device comprising: a first ferroelectric or electroclinic response type liquid crystal halfwave plate with liquid crystal material between a ... Read More
Inventors: Andersson, Gunnar; Dahl, Ingolf; Komitov, Lachezar; Lagerwall, Sven Torbjorn; Skarp, Kent; Stebler, Bengt;, Assignee: S.T. Lagerwall S.A.R.L. (Bandol, FR) |
Optical equalizer
It is an object of the present invention to provide an easily scalable optical equalisation to at least partially compensate for the effects of gain tilt in optical amplifiers. It is a further object ... Read More
Inventors: King, Jonathan Paul;, Assignee: Nortel Networks Limited (Saint Laurent, CA) |
Distributed resonant ring fiber filter
An object of the invention is to improve the efficiency of a fiber amplifier and/or tailor the spectral output of a fiber amplifier. Another object is to provide an improved fiber optic filter. Yet an... Read More
Inventors: Berkey, George E.; Dong, Liang;, Assignee: Corning Incorporated (Corning, NY) |
Method and apparatus for reducing optical cross talk in a liquid crystal optical switch
The present invention relates to a method and an apparatus for electrically driving a liquid crystal device operating as a high-speed optical switch in a preferred field sequential color display syste... Read More
Inventors: Bos, Philip J.; Prince, Dennis;, Assignee: Tektronix, Inc. (Beaverton, OR) |
Method of and an apparatus for projecting a scanned two- or three-dimensional modulated light pattern originating from a light source
I claim: 1. A method of projecting a scanned two- or three-dimensional modulated light pattern originating from a light source and represented by a matrix of pixels, the method comprising the steps of... Read More
Inventors: Shanks, Ian A.;, Assignee: Thorn EMI plc (London, GB2) |
ECB type liquid crystal display device having birefringent layer with equal refractive indexes in the thickness and plane directions
OF THE INVENTION The present invention concerns a liquid crystal display device comprising: (1) a liquid crystal cell in which a liquid crystal layer comprising a liquid crystal composition having a ... Read More
Inventors: Kanemoto, Akihiko; Takiguchi, Yasuyuki; Iimura, Haruo;, Assignee: Ricoh Company, Ltd. (Tokyo, JP) |
Agile beam laser
In order to overcome the deficiencies in the prior art, the present invention utilizes phase conjugation principles to provide for a steerable laser beam having good beam quality. The present inventio... Read More
Inventors: Valley, George C.;, Assignee: Hughes Aircraft Company (El Segundo, CA) |
Jinc-trap resonator
The present invention provides a Fourier transform resonator employing a Jinc-trap spatial filter which is designed to satisfy the aforementioned needs. The resonator creates extremely flat, broad mod... Read More
Inventors: O'Meara, Thomas R.;, Assignee: The United States of America as represented by the Secretary of the Air (Washington, DC) |
Scanning laser for a scanning laser radar
The present invention disclosed and claimed herein provides an optical radar system for transmitting a first coherent signal and receiving the reflected portion thereof. The transmitter has a means fo... Read More
Inventors: Eden, Dayton D.; Case, William E.;, Assignee: LTV Aerospace and Defense (Dallas, TX) |
Visual display device with memory and telephone exchange incorporating such a device
To obviate these disadvantages the invention proposes a display device with a memory of the type incorporating a smectic liquid crystal layer which can assume a transparent state under the action of a... Read More
Inventors: Perbet, Jean-Noel; Hareng, Michel; Le Berre, Serge;, Assignee: Thomson-CSF (Paris, FR) |
CRT Display device
The disadvantages of the prior art are overcome with the present invention and an improved display control system for use in a CRT display device is provided. In accordance with one aspect of the pres... Read More
Inventors: Sakano, Yukio;, Assignee: Ricoh Company, Ltd. (JP) |
Electro-mechanical package of visual display and related circuitry
The present invention provides an electro-mechanical package, or single assembly, comprising three primary components, or modules: a readout device, preferably in the form of a liquid crystal display;... Read More
Inventors: Crosby, John B.;, Assignee: Beckman Instruments, Inc. (Fullerton, CA) |
Method for manufacturing a liquid crystal display device with thin-film-transistors
It is an object of the invention to provide a liquid crystal display which can be manufactured economically. It is another object of the invention to provide a liquid crystal display which exhibits hi... Read More
Inventors: Oritsuki, Ryouji; Wakui, Masateru; Suzuki, Hirofumi;, Assignee: Hitachi, Ltd. (Tokyo, JP) |
Liquid crystal display having patterned insulating and semiconductor layers and a method of fabricating the same
It is an object of the present invention to improve the foregoing characteristics or provide a trade-off between those characteristics and to provide a substrate having thin-film transistors and a liq... Read More
Inventors: Ono, Kikuo; Ohwada, Junichi; Yamamoto, Hideaki; Asuma, Hiroaki; Konishi, Nobutake;, Assignee: Hitachi, Ltd. (Tokyo, JP) |
Active matrix liquid crystal panel having an active layer and an intervening layer formed of a common semiconductor film
OF THE INVENTION FIG. 1A is a block diagram showing the arrangement of the main part of an active matrix liquid crystal display according to the present invention, and FIG. 1B is a diagram showing th... Read More
Inventors: Ueda, Tomomasa; Onozuka, Yutaka; Hara, Yujiro; Saito, Shuichi; Ikeda, Mitsushi;, Assignee: Kabushiki Kaisha Toshiba (Kawasaki, JP) |
Semiconductor device
It is an object of the present invention to provide a TFT having a high resistance region (HRD) through a simplified process instead of the foregoing complicated process. Here, the HRD includes not on... Read More
Inventors: Zhang, Hongyong; Yamaguchi, Naoaki; Takemura, Yasuhiko;, Assignee: Semiconductor Energy Laboratory Co., Ltd. (Kanagawa-ken, JP) |
Compound semiconductor light emitting device and method of fabricating the same
An object of the present invention, which has been completed to solve the above problems, is to provide semiconductor lasers capable of suppressing the surface state density on the facets of semicondu... Read More
Inventors: Horie, Hideyoshi; Ohta, Hirotaka; Fujimori, Toshinari;, Assignee: Mitsubishi Chemical Corporation (Tokyo, JP) |
Exposure control system
The present invention is addressed to an exposure control system and apparatus which enjoys a capability for enhanced operational versatility in conjunction with high exposure regulating accuracy. Uti... Read More
Inventors: Stempeck, John W.;, Assignee: Polaroid Corporation (Cambridge, MA) |
Program-controlled shutter
What is claimed is: 1. A program-controlled shutter comprising a. an exposure control mechanism comprising a plurality of shutter blades which also function as the aperture control blades, and driving... Read More
Inventors: Iwata, Hiroshi; Ishikawa, Katsuji;, Assignee: West Electric Company, Ltd. (JA) |
Light totalizing system for photographic camera provided with a shutter-diaphragm
What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims. 1. In combination with a photographic-camera shutter-diaphragm system of the type operative fo... Read More
Inventors: Lermann, Peter; Wagensonner, Eduard; Ruf, Wolfgang;, Assignee: AGFA-Gevaert, A.G. (Leverkusen, DE) |
Multi-item input/output device to input information to and retrieve other information from a terminal computer
With the foregoing in mind, it is an object of the present invention to provide an input/output device which eliminates the need for increasing the number of key switches with an increasing number of ... Read More
Inventors: Hakaridani, Mitsuhiro; Kamada, Hiroshi; Suzuki, Hitoshi; Osaki, Mikio;, Assignee: Sharp Kabushiki Kaisha (Osaka, JP) |
Failure detection circuit for impact printers or the like
Accordingly, an object of the present invention is to provide an improved failure detection circuit for an impact printer or the like which permits testing of the hammer drive circuits prior to the ti... Read More
Inventors: Nishino, Shinichi; Katagiri, Shigenobu; Kubo, Kazuyuki;, Assignee: Hitachi Koki Company, Limited (Tokyo, JP) |
Multipurpose liquid crystal display having means for removably positioning the retroreflector
What is claimed is: 1. A multipurpose liquid crystal display suitable for use as a reflective display and as overhead projection panel, comprising (a) a first transparent electrode means; (b) a second... Read More
Inventors: Kamath, Hundi; Jones, Philip J.;, Assignee: Raychem Corporation (Menlo Park, CA) |
Color filter
It is a primary object of this invention to provide effective color filter devices. Another object of the invention is to provide color filter devices of both the reflection and transmission types of ... Read More
Inventors: Katagiri, Yoshio;, Assignee: Kabushiki Kaisha Daini Seikosha (JA) |
Liquid crystal display device
OF THE PREFERRED EMBODIMENTS FIG. 4a is an exploded, explanatory view for showing an embodiment of a liquid crystal display device (including two liquid crystal layers) according to the first aspect ... Read More
Inventors: Tanaka, Masashi; Nakajima, Yutaka; Ihochi, Takahiko; Shibuya, Yoshimichi;, Assignee: Hitachi, Ltd. (Tokyo, JP) |
Warning display circuit of the electric shutter for camera
The present invention has eliminated this inconvenience: the warning and indication are given by effectuating comparison of the reference pulse whose width is pre-determined with a pulse having a widt... Read More
Inventors: Nagaoka, Shinji; Kato, Shogo; Nakamura, Yukio;, Assignee: Seiko Koki Kabushiki Kaisha (JA) |
Photographic apparatus having a reflex optical system
The present invention provides a photographic apparatus, preferably in the form of a reflex camera for use with integral self-developing film units. The camera features a reflex optical system wherein... Read More
Inventors: Johnson, Bruce K.;, Assignee: Polaroid Corporation (Cambridge, MA) |
Image processing equipment with light source synchronized to blanking interval of video camera
The objects of the present invention are as described above, and the equipment according to the present invention for measuring the change in the sample with the time by a high-sensitivity television ... Read More
Inventors: Uchiyama, Shigeru; Fujiwake, Hideji; Nakagawa, Iwayo; Hirano, Masahiko; Mizuguchi, Yoshinori; Oishi, Hideshi; Sugiyama, Norikazu;, Assignee: Hamamatsu Photonics K.K. (JP) |
LCD 
