With Unequal Areas For Different Colors Or With Fractional Shift Between One Line Of Colors And The Next Patents (Class 349/109)
  • Patent number: 6335779
    Abstract: A method of manufacturing an in-plane switching liquid crystal display apparatus which includes forming on a TFT array substrate, a plurality of scanning signal lines, a plurality of image signal lines each crossing the scanning signal lines, thin film transistors at each intersection of the scanning signal lines and image signal lines, liquid crystal driving electrodes opposing the liquid crystal driving electrodes, and common signal lines connected to the common electrodes. Further, the method includes opposing a counter substrate to the TFT array substrate, interposing a plurality of spacers in a gap between the TFT array substrate and the counter substrate, and interposing a sealing agent in the gap between the TFT array substrate and the counter substrate so as to adhere the TFT array substrate and the counter substrate at peripheral portions thereof.
    Type: Grant
    Filed: September 19, 2000
    Date of Patent: January 1, 2002
    Assignees: Mistubishi Denki Kaubshiki Kaisha, Advanced Display Inc.
    Inventors: Yasuhiro Morii, Fumio Matsukawa, Akira Tsumura, Shin Tahata, Masaya Mizunuma, Akira Tamatani, Masayuki Fujii, Yasuo Fujita
  • Patent number: 6275274
    Abstract: The reflective liquid crystal display device of this invention includes: a pair of substrates sandwiching a liquid crystal layer therebetween; a plurality of pixel electrodes having a delta arrangement formed on one of the pair of substrates; a plurality of signal lines formed on the one of the pair of substrates, the signal lines having bent portions; a plurality of scanning lines formed on the one of the pair of substrates, the plurality of scanning lines and signal lines being formed to run along peripheries of the plurality of pixel electrodes so as to cross each other; and a plurality of thin film transistors electrically connected to the plurality of signal lines for controlling potentials of the pixel electrodes, wherein at least one of the plurality of thin film transistors is formed at a position where the distance between two adjacent signal lines of the plurality of signal lines is reduced by the bent portion of at least one of the two adjacent signal lines.
    Type: Grant
    Filed: October 8, 1998
    Date of Patent: August 14, 2001
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yuzuru Kanemori, Kazuhiko Tsuda, Kozo Nakamura
  • Patent number: 6124909
    Abstract: In a liquid crystal display device using color filters, the area of each of color filters arranged on the inner surface of one of substrates in correspondence with the pixel areas is set to be smaller than that of each pixel area to form non-colored light exit areas, and color pixels are displayed with non-colored light which is not transmitted through the color filters and colored light which is transmitted through the color filters. Since high-luminance color pixels are displayed with these colored light and non-colored light, the screen can be made brighter. The liquid crystal display device further includes a reflecting member for reflecting external light incident from the front side of the device and transmitted through the liquid crystal layer toward the front side.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: September 26, 2000
    Assignee: Casio Computer Co., Ltd.
    Inventors: Takashi Miyashita, Tetsushi Yoshida, Hidetoshi Akao, Tsuyoshi Toyoshima, Jiro Takei
  • Patent number: 6115015
    Abstract: Blue bright spots occurring when using overhead projectors with liquid crystal modules (LCDs) are prevented by providing intercepting filter in the liquid crystal module for modifying light reaching the thin film transistors of the LCDs in the portion of the spectrum absorbed by and passing through the protection layer formed on the TFT. In the case where protection layer on the TFT is formed of an amorphous silicon layer, the intercepting filter has the characteristic of modifying the light having wavelengths of 380 nm to 500 nm. The intercepting filter being a color filter of other than blue is formed just above the TFT at least part of which is related to a cell of blue.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: September 5, 2000
    Assignee: International Business Machines Corporation
    Inventors: Takashi Fujita, Shuichi Odahara
  • Patent number: 6100861
    Abstract: Pixel layout and placement designs provide improved color gamut in a tiled flat-panel display. The subpixels of the pixel designs are sized, placed and geometrically shaped so that the color purity, or equal amounts of RGB, are emitted from the display. The pixel designs match the subpixel size with the color filter and spectral content of the illumination source. The layout and placement design of the color pixel elements does not significantly shift the color purity of each pixel of the tile that may be in plane misalignment with respect to aperture masks above and below the tiles in the display configurations.
    Type: Grant
    Filed: February 17, 1998
    Date of Patent: August 8, 2000
    Assignee: Rainbow Displays, Inc.
    Inventors: Jennifer Cohen, Raymond G. Greene, Dean W. Skinner
  • Patent number: 6100955
    Abstract: A so-called in-plane electric field type color liquid crystal display device employs the following configuration in order to minimize smear. Groups of row-direction arrayed unit pixels are staggered one-half pitch of the unit pixels from the adjacent row-direction arrayed unit pixel groups. Three adjoining unit pixels are selected from two adjacent row-direction arrayed unit pixel groups so that they straddle these two unit pixel groups, and the three selected adjoining unit pixels are assigned three primary colors respectively.
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: August 8, 2000
    Assignee: Hitachi, Ltd.
    Inventors: Kazuhiko Yanagawa, Masuyuki Ohta, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai
  • Patent number: 6081309
    Abstract: A liquid crystal device is constituted by a first substrate provided with a plurality of scanning electrodes; a second substrate provided with a plurality of data electrodes and disposed opposite to the first substrate, the data electrodes intersecting the scanning electrodes to form a plurality of pixels; a liquid crystal disposed between the first and second substrates; and a plurality of color filters of first to third colors composed of red, green and blue disposed on one of the first and second substrates. In the device each pixel is constituted by four intersections formed by adjacent two scanning electrodes and adjacent two data electrodes, said four intersections being provided with said color filters of first to third colors.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: June 27, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaaki Suzuki, Masanori Takahashi
  • Patent number: 6028333
    Abstract: A circuit adapted to dynamically activate an electro-optical display device is constructed from a thin-film gate-insulated semiconductor device. This device comprises PMOS TFTs producing only a small amount of leakage current. Besides the dynamic circuit, a CMOS circuit comprising both NMOS and PMOS thin-film transistors is constructed to drive the dynamic circuit.
    Type: Grant
    Filed: July 19, 1996
    Date of Patent: February 22, 2000
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Yasuhiko Takemura
  • Patent number: 6023315
    Abstract: A liquid crystal spatial light modulator comprises columns and rows of picture elements. The columns are arranged as groups of columns, for instance under respective parallax generating elements in an autostereoscopic 3D display. The picture elements are arranged as sets to form color picture elements such that the picture elements of each set are disposed at the apices of a polygon, such as a triangle, and are disposed in corresponding columns of the groups of columns.
    Type: Grant
    Filed: July 3, 1996
    Date of Patent: February 8, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Johnathan Harrold, Graham John Woodgate
  • Patent number: 5936693
    Abstract: An underlying electrode is formed on nearly the entire surface of an opposing substrate and a color filter is formed on the underlying electrode. An overcoat layer is formed on the color filter. A stripe-shaped overlying electrode connected to the underlying electrode and extending to a part of each pixel area is formed on the overcoat layer, and an alignment film is formed on the overlying electrode. Formed on a TFT substrate are TFT's, pixel electrodes and another alignment film which covers the TFT's and pixel electrodes. A liquid crystal is provided between both substrates. When a drive voltage is applied between the underlying electrode and the pixel electrodes, the drive voltage is applied almost directly to the liquid crystal between the overlying electrode and the pixel electrodes, and a drive voltage dropped by the color filter and overcoat layer is applied to the liquid crystal between the underlying electrode and the pixel electrodes.
    Type: Grant
    Filed: September 26, 1995
    Date of Patent: August 10, 1999
    Assignee: Casio Computer Co., Ltd.
    Inventors: Tetsushi Yoshida, Takashi Miyashita, Yoshinaga Miyazawa, Toshihiro Mannouji, Hiroko Awata, Yasushi Nakajima
  • Patent number: 5936694
    Abstract: A liquid crystal device is constituted by disposing a liquid crystal between a pair of substrates each provided with an electrode to provide an effective optical modulation region and a peripheral region. At least one substrate of the pair of substrates comprises an intermediate layer disposed between the substrate and the electrode in the effective optical modulation region and the peripheral region, and the electrode on the intermediate layer comprises a first electrode disposed at least in the effective optical modulation region and a second electrode disposed in the peripheral region. The first and second electrodes are separated from each other. The intermediate layer may preferably include a color filter, a light-interrupting layer and a coating layer.
    Type: Grant
    Filed: April 24, 1996
    Date of Patent: August 10, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaaki Suzuki, Noriyuki Nakai, Masayuki Shimamune
  • Patent number: 5899550
    Abstract: A display device includes a multiplicity of pixels arranged in a matrix of rows and columns, each pixel including a plurality of color pixels each divided into a plurality of sub-color pixels having mutually different areas. The plurality of sub-color pixels are arranged in the row or column direction in different manners for at least two of said plurality of color pixels. As a result, the sub-color pixels may be arranged so that, when the respective color pixels are driven to display an identical gradation level, a ratio of a row-direction line width to a column-direction line width is closer to 1 than the ratio obtained when all the color pixels have an identical sub-color pixel arrangement, whereby numerals and characters, for example, can be displayed at an improved display quality.
    Type: Grant
    Filed: August 26, 1997
    Date of Patent: May 4, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yuichi Masaki
  • Patent number: 5870157
    Abstract: A liquid crystal display device of the present invention includes: a active matrix substrate; a liquid crystal layer; and a counter substrate opposing the active matrix substrate with the liquid crystal layer interposed therebetween. The active matrix substrate includes a plurality of scanning lines, a plurality of signal lines crossing the scanning lines, a plurality of switching elements each provided near a crossing of each scanning line and each signal line, an insulating film, and a plurality of pixel electrodes at least partially overlapping the scanning lines and the signal lines with the insulating film interposed therebetween. The counter substrate includes a plurality of color filters. Adjoining color filters of different colors on the counter substrate at least partially overlap each other at a position corresponding to a boundary between adjoining pixel electrodes on the active matrix substrate.
    Type: Grant
    Filed: September 26, 1996
    Date of Patent: February 9, 1999
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takayuki Shimada, Yuzuru Kanemori, Mikio Katayama
  • Patent number: 5812228
    Abstract: The invention provides a color liquid crystal display including (a) two transparent substrates A and B disposed in facing relation, (b) a plurality of switching elements disposed on a surface of the substrate A, the surface facing the substrate B, said switching elements defining an area, (c) a light-impermeable layer disposed on a surface of the substrate B, the surface facing the substrate A, and (d) a colored layer overlying the light-impermeable layer and defining a display area corresponding to the area defined by the switching elements. The colored layer has an extension extending over the display area in longitudinal and transverse directions of the display area. The extensions of the colored layer cover the light-impermeable layer therewith to thereby prevent a light reflected from the light-impermeable layer from entering the switching element. Thus, it is possible to prevent the black level of the display area from being whitened.
    Type: Grant
    Filed: October 3, 1995
    Date of Patent: September 22, 1998
    Assignee: NEC Corporation
    Inventors: Junichirou Miura, Toshiaki Ishiyama
  • Patent number: 5760857
    Abstract: A so-called in-plane electric field type color liquid crystal display device employs the following configuration in order to minimize smear. Groups of row-direction arrayed unit pixels are staggered one-half pitch of the unit pixels from the adjacent row-direction arrayed unit pixel groups. Three adjoining unit pixels are selected from two adjacent row-direction arrayed unit pixel groups so that they straddle these two unit pixel groups, and the three selected adjoining unit pixels are assigned three primary colors respectively.
    Type: Grant
    Filed: August 5, 1996
    Date of Patent: June 2, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Kazuhiko Yanagawa, Masuyuki Ohta, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai
  • Patent number: 5737042
    Abstract: An image display device is so adapted as to eliminate both largest and next largest noise components. The image display device includes an image display body having a plurality of pixels arranged periodically in two dimensions and an optical low-pass filter placed on or above the front surface of the image display body. One of two cut-off spatial frequencies in at least one direction of the optical low-pass filter is set within a range of values greater than 1/4 and less than 3/4 of a specific sampling frequency (that having the second lowest frequency) among sampling frequencies determined by the pixel arrangement of the image display body, and the other of the two cut-off spatial frequencies is set within a range of values greater than 3/4 and less than 5/4 of the specific sampling frequency, where the specific sampling frequency is taken as being 1.
    Type: Grant
    Filed: August 30, 1995
    Date of Patent: April 7, 1998
    Assignee: Omron Corporation
    Inventors: Masayuki Shinohara, Shigeru Aoyama
  • Patent number: 5642176
    Abstract: Disclosed herein is a liquid crystal display device comprising a liquid crystal held between a pair of bases each equipped with at least a transparent electrode, and pixels each having at least four color regions which are divided from one another, wherein the four color regions in one pixel comprise a first region in which a filter for red is arranged to display a red color, a second region in which a filter for blue is arranged to display a blue color, a third region in which a filter for green is arranged to display a green color, and a fourth region in which a filter for red, a filter for blue and a filter for green are arranged to display a color.
    Type: Grant
    Filed: November 24, 1995
    Date of Patent: June 24, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kotaro Abukawa, Toshimitsu Tanaka