Patents Examined by Tiep H. Nguyen
  • Patent number: 5677746
    Abstract: The back light device for a liquid crystal display disclosed has a photoconductor, a light source, a reflection plate, and a pair of resin blocks. A case is placed at a back surface of the photoconductor for holding the reflection plate and fixing the photoconductor. In the case, a plurality of consecutive cutouts are provided at a portion that holds the reflection plate. The consecutive cutouts are perpendicular to an axis of the light source. This structure enables the dissipation of the heat accumulated in the reflection plate through the consecutive cutouts.
    Type: Grant
    Filed: August 15, 1995
    Date of Patent: October 14, 1997
    Assignee: NEC Corporation
    Inventor: Takakazu Yano
  • Patent number: 5671029
    Abstract: An apparatus for manufacturing a display device in which a rubbing process is carried out to an orientation member included by a substrate member, the substrate member further including: a transparent substrate; a plurality of electrodes formed on one surface of the transparent substrate; a plurality of terminals which are formed in a peripheral portion of the transparent substrate and through which a drive signal is supplied to the electrodes, the orientation member covering the surface of the transparent substrate on which the electrodes are formed, comprises:holding means having a mounting face on which the substrate member is to be mounted, for holding the substrate member so that the orientation member is directed upward in relation to the mounting face;short-circuit means which can be contacted with and separated from a peripheral portion of the substrate member held by the holding means, where the terminals of the substrate member are formed, and have an electrically conductive contact face to be conta
    Type: Grant
    Filed: May 1, 1995
    Date of Patent: September 23, 1997
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Takashi Haruki
  • Patent number: 5671031
    Abstract: A reflection type liquid crystal display device of the present invention includes: a first substrate having a reflective electrode formed thereon; a second substrate having a transparent counter substrate and a color filter formed thereon; and a liquid crystal layer interposed between the first and second substrates, wherein the color filter includes a red color filter portion and a cyan color filter portion. The cyan color filter portion transmits light having a complementary color of a color of light transmitted through the red color filter portion. The light transmitted through the red color filter portion has a chromaticity (x, y) on the XYZ color system chromaticity diagram satisfying the following formulae at a 2.degree. viewing angle using a standard light source D.sub.65 :(0.038).sup.2 .ltoreq.(x-0.313).sup.2 +(25/4).multidot.(y-0.329).sup.2 .ltoreq.(0.178).sup.2 ;y.ltoreq.0.145x+0.236; andy.gtoreq.-0.233x+0.376.
    Type: Grant
    Filed: August 27, 1996
    Date of Patent: September 23, 1997
    Assignees: Sharp Kabushiki Kaisha, Toppan Printing Co., Ltd.
    Inventors: Kozo Nakamura, Mariko Ban, Naofumi Kimura, Akio Haneda
  • Patent number: 5671027
    Abstract: An active matrix liquid crystal display device, with a plurality of thin-film transistors provided over a glass substrate each including an anodized oxide film of aluminum gate electrode, in which transparent pixel electrodes are formed in the same plane as the gate electrodes between the glass substrate and amorphous silicon islands over which source and drain electrodes are provided.
    Type: Grant
    Filed: August 1, 1995
    Date of Patent: September 23, 1997
    Assignee: Hitachi, Ltd.
    Inventors: Akira Sasano, Kazuo Shirahashi, Yuka Matsukawa, Hideaki Taniguchi, Hideaki Yamamoto, Haruo Matsumaru
  • Patent number: 5666172
    Abstract: One side wall of a liquid crystal display device (11) having a surface iluminant light source (backlight) is formed by one side wall (521) of an outer frame (bezel cover) (500) and a vertical wall of a lamp cover (850). In this liquid crystal display device (11), the lower end of the side wall (521) of the outer frame (500) and the upper end of the cover (850) are provided with bent ends (853, 523) and these bent ends (853, 523) engage with each other. In this way it is possible to make the display than and lightweight while maintaining ample rigidity, Also, the liquid crystal panel (100) is not readily damaged by shocks from outside. Furthermore, replacement of the linear light source (811) is extremely easy.
    Type: Grant
    Filed: April 22, 1996
    Date of Patent: September 9, 1997
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kazushige Ida, Tetsuya Murai
  • Patent number: 5666171
    Abstract: An image projector comprises a liquid crystal display module and a light source both contained in a housing. The housing is formed with an inlet and an outlet, and is provided with a fan. An air flow channel is provided between the inlet and the outlet within the housing. There is provided a wind separator in the air flow channel, which separator separates cooling air such that cooling air flows separately towards the liquid crystal display module and the light source, for better cooling effect.
    Type: Grant
    Filed: July 28, 1995
    Date of Patent: September 9, 1997
    Assignee: Casio Computer Co., Ltd.
    Inventors: Hideki Nakamura, Yukio Suzuki
  • Patent number: 5666177
    Abstract: A liquid crystal display having improved contrast has been developed by providing a black matrix comprising two layers, a metallic underlayer and a top layer of resin in which particles of black pigment have been dispersed. Additionally, said resin is photosensitive so, after exposure to an image having the shape of the desired black matrix, it assumes the form of the black matrix after development. It is then used as a mask during the etching of the underlying metallic layer. The presence of the resin greatly reduces the reflectivity of the black matrix, thereby increasing the contrast level of the overall display, while the underlying metallic layer provides a solid base for it to rest on.
    Type: Grant
    Filed: February 26, 1996
    Date of Patent: September 9, 1997
    Assignee: Industrial Technology Research Institute
    Inventors: Ting-Chiang Hsieh, Dong-Yuan Goang
  • Patent number: 5663817
    Abstract: A structure including a laser source 1, a collimator 14, a liquid-crystal cell spatial modulator 7, a convergent lens and a zoom 10 function to project moving images with variable enlargements onto a screen 11 for use with air combat simulators.
    Type: Grant
    Filed: August 4, 1994
    Date of Patent: September 2, 1997
    Assignee: Thomson-CSF
    Inventors: Pascal Frapin, Michel Lacroix
  • Patent number: 5661578
    Abstract: The disclosure is directed to a color liquid crystal display backlight system for daytime and nighttime use. Night vision imaging system retirements are met so that light emissions from the 630 nm to 930 nm range are substantially reduced or eliminated. Separate daytime and nighttime light sources are utilized. The NVIS compatible nighttime source is positioned to be out of sight of a user and produces an appropriately filtered, substantially collimated beam which diffusively reflects from the inside walls and base of the display housing before it illuminates the display surface. Intensities of both daytime and nighttime light sources can be controlled.
    Type: Grant
    Filed: July 27, 1993
    Date of Patent: August 26, 1997
    Assignee: Honeywell Inc.
    Inventors: Robert D. Habing, Armand R. Losinski, Larry A. Nelson, Teddy J. Wood
  • Patent number: 5659377
    Abstract: In accordance with the invention, an apparatus for filling an LCD cell comprises a capillary wick coupled to reservoir of liquid crystal material by capillary action. The cell is filled by disposing the plates containing an unsealed region in contact with the wick, minimizing contact between the cell and the material in the reservoir.
    Type: Grant
    Filed: November 30, 1995
    Date of Patent: August 19, 1997
    Assignee: Lucent Technologies Inc.
    Inventors: Gary Dabbagh, Cheng-Yih Lin
  • Patent number: 5659410
    Abstract: A wedge shaped parallelized light flux element made of a light scattering guide of an emitting directionality has a specified ranged effective scattering irradiation parameter and correlation distance "a". A light incident into the parallelized light flux element from a fluorescent lamp arranged facing a light incident surface of the parallelized light flux element is emitted from a light output surface as a parallelized light flux G1 by composite factors including forward scattering of the inside, repeated reflection on wedge shaped two sides, critical angular condition and boundary face transmittance for the light output surface. A total amount of parallel light flux G1 emitted from the parallel light flux emitting section F is reflected on a two side prism surface of two prism reflection element PR thereby being converted into sectional area enlarged light fluxes G2 and G3. They are incident on a liquid crystal panel LP through a light diffusion plate DF, and utilized as a backlight.
    Type: Grant
    Filed: December 23, 1994
    Date of Patent: August 19, 1997
    Assignee: Enplas Corporation
    Inventors: Yasuhiro Koike, Takayuki Arai
  • Patent number: 5654810
    Abstract: A liquid crystal display apparatus designed so that the viewing angle dependence is minimized without causing the displayed image to become unsharp. The liquid crystal display apparatus has a display surface (16) for displaying an image by a plurality of pixels, and a backlight (11) disposed at a side of the apparatus which is reverse to the display surface (16) to allow an approximately parallel light beam, which is approximately normal to the display surface (16), to enter each pixel of the display surface. A microlens array (20) is disposed at the viewing side of the display surface (16), and a diffusing element (21) is disposed in the vicinity of a surface conjugate with the display surface (16) which is formed by the microlens array (20).
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: August 5, 1997
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Toshiro Okamura, Seiichiro Tabata
  • Patent number: 5648859
    Abstract: A liquid crystal microprism array has a plurality of grooves formed on a surface of a transparent substrate, a plurality of spaces divided by ridges of the grooves, and a plurality of liquid crystal cells placed in the spaces.
    Type: Grant
    Filed: July 27, 1994
    Date of Patent: July 15, 1997
    Assignee: Nippon Telephone & Telegraph Corp.
    Inventors: Katsuhiko Hirabayashi, Tsuyoshi Yamamoto, Masayasu Yamaguchi, Hirofumi Yamazaki
  • Patent number: 5646703
    Abstract: Disclosed is a liquid crystal display provided with an optical compensatory sheet consisting essentially of a transparent support and a layer prepared from a discotic liquid crystal of a low molecular weight, or an optical compensatory sheet which has the minimum of absolute values of retardation values in a direction inclined from the normal of the sheet and has no optic axis.
    Type: Grant
    Filed: September 22, 1994
    Date of Patent: July 8, 1997
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Koh Kamada, Hiroko Kozono, Jun Watanabe, Kohei Arakawa
  • Patent number: 5646702
    Abstract: A liquid crystal display having pixels illuminated by field emitter arrays. The field emitter arrays may be utilized to illuminate each pixel individually or to be a backlight lamp to illuminate the whole display, whether monochrome or color. A field emitter array back-lighted liquid crystal displays, whether active matrix or passive, provide greater compactness, higher luminous efficiency, more brightness, and longer lifetime than a fluorescent lamp. Field-emitter arrays may also provide light in various colors for the liquid crystal display thereby eliminating the need for color filters which result in duller colors than that of field emitter arrays. Each color filter absorbs two-thirds of the light that it receives. A color filter liquid crystal color display exhibits colors that have diminished chromaticity and purity in comparison to those of a field emitter array liquid crystal display.
    Type: Grant
    Filed: October 31, 1994
    Date of Patent: July 8, 1997
    Assignee: Honeywell Inc.
    Inventors: Akintunde Ibitayo (Tayo) Akinwande, Kalluri R. Sarma
  • Patent number: 5646757
    Abstract: In a circuit equivalent to a plasma addressed display device for one pixel, a liquid crystal layer and a dielectric sheet are constructed according toRLC/(RLC+RG)<CG/(CLC+CG)where RLC and CLC are respectively the resistance and capacity of the liquid crystal layer, and where RG and CG are respectively the resistance and capacity of the dielectric sheet. Accordingly, the circuit has a high pass characteristic, so that the circuit can reduce the gain of the DC component. Even when a data voltage includes a direct current offset, the DC component applied to the liquid crystal layer is low, and accordingly, it is possible to prevent the occurrence of image sticking.
    Type: Grant
    Filed: April 25, 1995
    Date of Patent: July 8, 1997
    Assignee: Sony Corporation
    Inventor: Masatake Hayashi
  • Patent number: 5644259
    Abstract: A reset circuit includes a plurality of registers (R1-R8) in which a logical value at power on is shifted and set to a predetermined logical value after a predetermined time has elapsed since a power supply was switched on and a logic circuit (1) for outputting a coincidence signal while each of the/plurality of registers is set to the predetermined logic value but outputting a non-coincidence signal while when at least one register is set to a value different from the predetermined logical value. The non-coincidence signal is employed as a reset signal. The plurality of registers are designed to output a value different from the predetermined logic value initially when switching on the power supply. The reset signal can be obtained by even a low power voltage irrespective of a power voltage waveform at the power-on time.
    Type: Grant
    Filed: March 18, 1996
    Date of Patent: July 1, 1997
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Nobuo Shishikura, Makiko Ogiu
  • Patent number: 5644369
    Abstract: A switchable lens/diffuser including an optical component constructed to form an optical image in cooperation with light directed thereon and a layer of polymer dispersed liquid crystal material having a clear state and a diffusing state, the layer of material being positioned in conjunction with the optical component so that the optical component forms an optical image when the layer of polymer dispersed liquid crystal material is in the clear state and the layer of polymer dispersed liquid crystal material serves as a diffusing screen to form an image in cooperation with the light directed thereon in the diffusing state.
    Type: Grant
    Filed: February 24, 1995
    Date of Patent: July 1, 1997
    Assignee: Motorola
    Inventors: Karen E. Jachimowicz, Michael S. Lebby
  • Patent number: 5644415
    Abstract: Electric field adjusting layers each of which is different from an aligning film in at least one of a resistivity and a dielectric constant are formed in each pixel on a pixel electrode of a first substrate. An electric field applied to a liquid crystal partially changes in each pixel, and regions which are different from each other in aligned state are formed in each pixel. Therefore, a field angle is widened. A value .DELTA.n.d of the liquid crystal is preferably set to be 600 nm or more.
    Type: Grant
    Filed: December 13, 1994
    Date of Patent: July 1, 1997
    Assignee: Casio Computer Co., Ltd.
    Inventors: Hisashi Aoki, Tetsushi Yoshida
  • Patent number: 5641954
    Abstract: A series of taps are created within an acousto-optic cell by imaging an array of LEDs within the cell. The illuminated tap regions are selectively changed by energizing selected LEDs. The electrical input signal produces a travelling acoustic wave within the cell and when the wave crosses illuminated tap regions, electrical output signals are produced having delays proportional to the positions of illuminated LEDs in the array. The magnitude of the output signal is proportional to the LED light intensity which is varied to produce a weighted output signal.
    Type: Grant
    Filed: August 17, 1995
    Date of Patent: June 24, 1997
    Assignee: The United States of American as represented by the Secretary of the Air Force
    Inventors: Christopher W. Keefer, Michael J. Ward, David J. Grucza