Patents by Inventor Katsuhiko Morishita

Katsuhiko Morishita has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20230400730
    Abstract: A liquid crystal display device includes a light source including a plurality of light emitters each to emit a laser beam and an emission surface through which the laser beam is emittable from each of the plurality of light emitters, and a liquid crystal panel on the emission surface to control an amount of the laser beam incident through the emission surface to be transmitted for display. Each of the plurality of light emitters emits the laser beam at an incident polarization angle on the liquid crystal panel maximizing a transmittance of the laser beam through the liquid crystal panel.
    Type: Application
    Filed: November 10, 2021
    Publication date: December 14, 2023
    Inventors: Katsuhiko MORISHITA, Yu MOCHIZUKI, Yoshiki TANAKA, Kenta KAMOSHIDA, Tetsuya MORITA, Mitsuhiro MURATA
  • Publication number: 20200150497
    Abstract: A liquid crystal display device includes: a first substrate; a second substrate; and a liquid crystal layer that contains liquid crystal molecules. The first substrate includes, in the following order toward the liquid crystal layer, a bus line extending in a first direction, a first electrode, an insulating layer, and a second electrode. The second electrode is provided with a longitudinal portion extending in a second direction in a pixel region. The initial alignment direction of the liquid crystal molecules and the second direction satisfy the following relation (A) or (B): (A) the initial alignment direction of the liquid crystal molecules is at an angle of 0° to +5° and the second direction is at a negative angle; and (B) the initial alignment direction of the liquid crystal molecules is at an angle of ?5° to 0° and the second direction is at a positive angle.
    Type: Application
    Filed: November 13, 2019
    Publication date: May 14, 2020
    Inventors: SHOGO NISHIWAKI, TAKAHIRO NEMOTO, KATSUHIKO MORISHITA, HISASHI NAGATA, MASATOSHI ITOH
  • Patent number: 10564479
    Abstract: A display device includes a display panel and imaging means. The display panel includes a first substrate, a second substrate, and an electrooptical substance layer between the first and second substrates. The display panel has a first substrate side as an external light entering side and is partitioned into a display area and a non-display area. The non-display area includes a light-transmitting area through which the external light entering the display panel is transmitted toward a second substrate side of the display panel. The imaging means is disposed on the second substrate side so as to receive the external light transmitting through the light-transmitting area, and a short-wavelength-light absorption layer capable of absorbing light having a wavelength shorter than visible light is disposed on the external light entering side with respect to the electrooptical substance layer and the short-wavelength-light absorption layer extends over an entire area of the light-transmitting area.
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: February 18, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Shogo Nishiwaki, Katsuhiko Morishita, Hisashi Nagata
  • Publication number: 20190384121
    Abstract: A display device includes a display panel and imaging means. The display panel includes a first substrate, a second substrate, and an electrooptical substance layer between the first and second substrates. The display panel has a first substrate side as an external light entering side and is partitioned into a display area and a non display area. The non-display area includes a light-transmitting area through which the external light entering the display panel is transmitted toward a second substrate side of the display panel. The imaging means is disposed on the second substrate side so as to receive the external light transmitting through the light-transmitting area, and a short-wavelength-light absorption layer capable of absorbing light having a wavelength shorter than visible light is disposed on the external light entering side with respect to the electrooptical substance layer and the short-wavelength-light absorption layer extends over an entire area of the light-transmitting area.
    Type: Application
    Filed: June 12, 2019
    Publication date: December 19, 2019
    Inventors: SHOGO NISHIWAKI, KATSUHIKO MORISHITA, HISASHI NAGATA
  • Patent number: 10203579
    Abstract: A liquid crystal display device includes a counter substrate and an active matrix substrate, and a liquid crystal layer that is provided between the counter substrate and the active matrix substrate. The active matrix substrate includes gate interconnect lines, data interconnect lines, a thin film transistor, a pixel electrode that is connected to the thin film transistor via a through hole, a common electrode, and an interlayer insulating layer that is disposed between the pixel electrode and the common electrode. Also, a photo spacer for providing a constant spacing between the counter substrate and the active matrix substrate is provided inside the liquid crystal layer, and equipotential lines having a voltage less than a threshold value are formed inside the photo spacer.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: February 12, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Katsuhiko Morishita, Kumi Furukawa, Shogo Nishiwaki, Masahiko Kondoh
  • Publication number: 20180081216
    Abstract: A liquid crystal display device includes a counter substrate and an active matrix substrate, and a liquid crystal layer that is provided between the counter substrate and the active matrix substrate. The active matrix substrate includes gate interconnect lines, data interconnect lines, a thin film transistor, a pixel electrode that is connected to the thin film transistor via a through hole, a common electrode, and an interlayer insulating layer that is disposed between the pixel electrode and the common electrode. Also, a photo spacer for providing a constant spacing between the counter substrate and the active matrix substrate is provided inside the liquid crystal layer, and equipotential lines having a voltage less than a threshold value are formed inside the photo spacer.
    Type: Application
    Filed: March 2, 2016
    Publication date: March 22, 2018
    Inventors: KATSUHIKO MORISHITA, KUMI FURUKAWA, SHOGO NISHIWAKI, MASAHIKO KONDOH
  • Patent number: 9377656
    Abstract: According to the present invention, a liquid crystal display device driven by a transverse electric field system, which can prevent the occurrence of color unevenness in display, is provided. Namely, the liquid crystal display device of the present invention includes: a first substrate, a second substrate, and a liquid crystal layer interposed between the first substrate and the second substrate. The first substrate includes a first shield electrode with translucency, a supporting substrate, a light shielding layer, and a colored layer. The second substrate includes a common electrode and a pixel electrode, and assuming that the liquid crystal layer is the center of the liquid crystal display device, the first shield electrode is provided outwardly from the supporting substrate when seen from the center. The liquid crystal display device further comprises a first controlling circuit configured to apply a positive electric potential to the first shield electrode.
    Type: Grant
    Filed: May 29, 2013
    Date of Patent: June 28, 2016
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Katsuhiko Morishita, Takehiko Sakai, Shogo Nishiwaki, Masashi Chino, Masatoshi Kondo
  • Patent number: 9360715
    Abstract: The present invention provides an FFS-mode liquid crystal display device which can prevent trace unevenness during white screen display. The present invention provides a liquid crystal display device including: a pair of substrate; and a liquid crystal layer interposed between the pair of substrates, wherein one of the pair of substrates includes a scanning signal line, a data signal line, pixel electrodes with a comb-tooth portion, a plate-like common electrode, and an interlayer insulating film provided between the pixel electrodes and the common electrode, the comb-tooth portion of each of the pixel electrodes includes a straight portion and a bent portion, the bent portion is provided at least at one end of the comb-tooth portion, and the interlayer insulating film is thinner at a position overlapping with the bent portion than at a position overlapping with the straight portion.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: June 7, 2016
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Katsuhiko Morishita, Takehiko Sakai, Shogo Nishiwaki, Masashi Chino, Masatoshi Kondo
  • Publication number: 20150301411
    Abstract: According to the present invention, a liquid crystal display device driven by a transverse electric field system, which can prevent the occurrence of color unevenness in display, is provided. Namely, the liquid crystal display device of the present invention includes: a first substrate, a second substrate, and a liquid crystal layer interposed between the first substrate and the second substrate. The first substrate includes a first shield electrode with translucency, a supporting substrate, a light shielding layer, and a colored layer. The second substrate includes a common electrode and a pixel electrode, and assuming that the liquid crystal layer is the center of the liquid crystal display device, the first shield electrode is provided outwardly from the supporting substrate when seen from the center. The liquid crystal display device further comprises a first controlling circuit configured to apply a positive electric potential to the first shield electrode.
    Type: Application
    Filed: May 29, 2013
    Publication date: October 22, 2015
    Inventors: Katsuhiko MORISHITA, Takehiko SAKAI, Shogo NISHIWAKI, Masashi CHINO, Masatoshi KONDO
  • Publication number: 20150116644
    Abstract: The present invention provides an FFS-mode liquid crystal display device which can prevent trace unevenness during white screen display. The present invention provides a liquid crystal display device including: a pair of substrate; and a liquid crystal layer interposed between the pair of substrates, wherein one of the pair of substrates includes a scanning signal line, a data signal line, pixel electrodes with a comb-tooth portion, a plate-like common electrode, and an interlayer insulating film provided between the pixel electrodes and the common electrode, the comb-tooth portion of each of the pixel electrodes includes a straight portion and a bent portion, the bent portion is provided at least at one end of the comb-tooth portion, and the interlayer insulating film is thinner at a position overlapping with the bent portion than at a position overlapping with the straight portion.
    Type: Application
    Filed: April 24, 2013
    Publication date: April 30, 2015
    Inventors: Katsuhiko Morishita, Takehiko Sakai, Shogo Nishiwaki, Masashi Chino, Masatoshi Kondo
  • Patent number: 8907938
    Abstract: A liquid crystal display device which can suppress generation of a locally luminous part where a dark line disappears. The display device includes: a pair of substrates, a liquid crystal layer sandwiched between the pair of substrates, wherein one of the pair of substrates includes a pair of electrodes in pixel. At least one of the electrodes may include a comb-tooth portion. A first comb-tooth portion of one of the pair of electrodes and a second comb-tooth portion of the other one of the pair of electrodes may be disposed to face each other. The distance between the pair of electrodes in a transverse direction of the comb-tooth portions of the pair of electrodes is at most 10 ?m in example embodiments, and a rotational viscosity of the p-type nematic liquid crystals may be at least 130 mPa·s.
    Type: Grant
    Filed: February 18, 2010
    Date of Patent: December 9, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kazunori Morimoto, Takehiko Sakai, Tetsuo Fujita, Dai Chiba, Katsuhiko Morishita, Tsuyoshi Okazaki
  • Patent number: 8546808
    Abstract: The liquid crystal display device of this invention includes picture element regions each defined by a first electrode provided on a first substrate and a second electrode provided on a second substrate so as to oppose the first electrode via a liquid crystal layer sandwiched therebetween. In each of the picture element regions, the first electrode includes a solid portion and a nonsolid portion. The liquid crystal display device further includes a pair of polarizing plates disposed with polarization axes thereof crossing each other substantially perpendicularly. The polarization axis of one of the pair of polarizing plates is substantially parallel to a direction in which the solid portion extends. When a voltage is applied between the first electrode and the second electrode, in each of the picture element regions, liquid crystal molecules of the liquid crystal layer are in a radially-inclined orientation state.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: October 1, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masumi Kubo, Akihiro Yamamoto, Takashi Ochi, Tetsuhiro Yamaguchi, Naoshi Yamada, Katsuhiko Morishita, Kiyoshi Ogishima, Kazuhiro Maekawa
  • Patent number: 8421975
    Abstract: The present invention provides a liquid crystal display device which can suppress generation of an afterimage.
    Type: Grant
    Filed: June 22, 2009
    Date of Patent: April 16, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Katsuhiko Morishita, Toshihiro Matsumoto, Tsuyoshi Okazaki
  • Patent number: 8384853
    Abstract: It is an object to provide a display that can reliably shield visible light in the entire wavelength regions when viewed from an oblique direction and a viewing angle control element used for the display. A viewing angle control liquid crystal panel (2) is comprised of a liquid crystal cell (21) and an emission-side polarizing plate (22). When light having a part of wavelength components (R,G) in the visible wavelength regions enters at least at a predetermined angle, the liquid crystal cell (21) provides the incident light with a phase difference so as to function as a first light-shielding layer that shields the light of the R and G components not to pass through the emission-side polarizing plate (22).
    Type: Grant
    Filed: May 20, 2008
    Date of Patent: February 26, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takehiko Sakai, Dai Chiba, Katsuhiko Morishita, Yoshiharu Kataoka, Chikanori Tsukamura
  • Publication number: 20120182511
    Abstract: The present invention provides a liquid crystal display device that adopts a TBA mode that can suppress the occurrence of unevenness of luminance. The liquid crystal display device includes a pair of substrates disposed facing each other, and a liquid crystal layer sandwiched between the pair of substrates. One of the pair of substrates has a pair of comb-tooth-shaped electrodes. The pair of electrodes are disposed to planarly face each other in a pixel, and are formed by patterning the same layer. The liquid crystal layer includes p-type nematic liquid crystal, and is driven by an electric field generated between the pair of electrodes. The p-type nematic liquid crystal is vertically aligned with respect to the surfaces of the pair of substrates when no voltage is applied. A spacing between the pair of electrodes varies in a longitudinal direction of the pair of electrodes.
    Type: Application
    Filed: May 10, 2010
    Publication date: July 19, 2012
    Inventors: Yuhko Hisada, Takehisa Sakurai, Mitsuhiro Murata, Tsuyoshi Okazaki, Katsuhiko Morishita
  • Patent number: 8199139
    Abstract: There are provided a viewing angle control device that can provide a pure black display without coloring and have a significantly improved shielding ability in the narrow viewing angle state, and a display using the viewing angle control device. To adjust the VT (voltage-transmittance) characteristics of a viewing angle control liquid crystal panel (2) that switches a viewing angle between a wide viewing angle state and a narrow viewing angle state by using birefringence of liquid crystal, translucent electrode films (205r, 205g, 206b), to which alternating-current voltages with different frequencies are applied, are provided on a portion of at least one of a pair of translucent substrates (201, 202) sandwiching the liquid crystal, the portion corresponding to at least one color of a picture element of a display liquid crystal panel (1), so that the voltage-transmittance characteristics of the liquid crystal are adjusted.
    Type: Grant
    Filed: March 13, 2008
    Date of Patent: June 12, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tsuyoshi Okazaki, Takehiko Sakai, Katsuhiko Morishita, Yoshiharu Kataoka, Chikanori Tsukamura, Dai Chiba
  • Publication number: 20120133867
    Abstract: A negative C plate (31) is arranged to be between a polarizing plate (32) and a reflective liquid crystal panel (20). A retardation of the negative C plate (31) is set so that a combination of the negative C plate (31) and the liquid crystal panel (20) generates a phase difference of “n?/4+?/8 (n is 0, or a positive or negative integer)” for a one-way light path with respect to linearly-polarized light entering into the liquid crystal display device. This makes it possible to provide, at low cost, a liquid crystal display device whose viewing angle can be narrowed by arbitrarily setting a direction in which visibility is limited.
    Type: Application
    Filed: February 6, 2012
    Publication date: May 31, 2012
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Takehiko Sakai, Dai Chiba, Katsuhiko Morishita, Yoshiharu Kataoka, Chikanori Tsukamura
  • Patent number: 8189147
    Abstract: A negative C plate (31) is arranged to be between a polarizing plate (32) and a reflective liquid crystal panel (20). A retardation of the negative C plate (31) is set so that a combination of the negative C plate (31) and the liquid crystal panel (20) generates a phase difference of “n?/4+?/8 (n is 0, or a positive or negative integer)” for a one-way light path with respect to linearly-polarized light entering into the liquid crystal display device. This makes it possible to provide, at low cost, a liquid crystal display device whose viewing angle can be narrowed by arbitrarily setting a direction in which visibility is limited.
    Type: Grant
    Filed: May 23, 2008
    Date of Patent: May 29, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takehiko Sakai, Dai Chiba, Katsuhiko Morishita, Yoshiharu Kataoka, Chikanori Tsukamura
  • Publication number: 20120127416
    Abstract: The present invention provides a liquid crystal display device having improved transmittance. The liquid crystal display device according to the present invention has a first substrate and a second substrate disposed to face each other, and a liquid crystal layer interposed between the first substrate and the second substrate. The first substrate includes a pixel electrode to which a signal voltage is supplied and a common electrode to which a common voltage is supplied. The pixel electrode and the common electrode both comprise comb teeth. The comb teeth of the pixel electrode and the comb teeth of the common electrode are disposed with each other alternately via an interval. The liquid crystal layer contains liquid crystal molecules having positive dielectric anisotropy. The liquid crystal molecules are aligned in a direction orthogonal to a surface of the first substrate in a voltage non-application condition.
    Type: Application
    Filed: May 10, 2010
    Publication date: May 24, 2012
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Katsuhiko Morishita, Tsuyoshi Okazaki, Takehiko Sakai, Dai Chiba, Shingo Kawashima, Tetsuo Fujita, Miyuki Yonezawa
  • Patent number: 8169567
    Abstract: A viewing angle controlling liquid crystal panel in which uniformity of a shielding effect in a screen is further improved is provided. Linearly polarized light enters a liquid crystal layer. Further, the liquid crystal layer is provided, on a light exit side of the liquid crystal layer, with a polarizing plate transmitting only a component of light having exited from the liquid crystal layer which component is parallel to a polarization axis of the linearly polarized light having entered the liquid crystal layer. Liquid crystal molecules contained in the liquid crystal layer are tilted in a direction parallel to or perpendicular to the polarization axis of the linearly polarized light having entered the liquid crystal layer. In addition, an electrode (26) is provided so that two or more different voltages can be applied to the liquid crystal layer simultaneously.
    Type: Grant
    Filed: August 27, 2007
    Date of Patent: May 1, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takehiko Sakai, Dai Chiba, Katsuhiko Morishita, Yoshiharu Kataoka, Chikanori Tsukamura