Patents by Inventor Takehiko Sakai

Takehiko Sakai 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).

  • 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
  • Patent number: 9125839
    Abstract: A composition for external use on skin that can be spread evenly on the skin, does not produce a liquid residue as a result of temperature change, and can suppress a feeling of sliminess of xanthan gum is provided. There are provided a composition for external use on skin containing 0.1% by mass to 10% by mass of a component (A) (a water-soluble polymer obtained by mixing agar with xanthan gum) and 30% by mass or more of a component (D) (water); the composition for external use on skin containing 0.5% by mass to 40% by mass of a divalent polyol as a component (B); the composition for external use on skin according to any one of the above compositions, which contains moisturizers as a component (C); and the composition for external use on skin according to any one of the above compositions, which contains oil as a component (E).
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: September 8, 2015
    Assignee: The Nisshin Oillio Group, Ltd.
    Inventors: Hisanori Kachi, Makoto Matsuzawa, Minaho Ookubo, Keiichi Oyama, Aki Gotou, Masaaki Kojima, Takehiko Sakai, Junichi Itou
  • 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: 8508678
    Abstract: A liquid crystal display device includes an active matrix substrate (20a) including a plurality of first touch panel interconnects (19b) extending in parallel with each other, a counter substrate (30a) facing the active matrix substrate (20a) and including a plurality of second touch panel interconnects (25a) extending in parallel with each other in a direction intersecting the first touch panel interconnects (19b), a liquid crystal layer (40) provided between the active matrix substrate (20a) and the counter substrate (30a) with an alignment film (9a, 9b) being interposed between the liquid crystal layer (40) and each of the active matrix substrate (20a) and the counter substrate (30a), and a plurality of columnar touch pins (P) connected to the first or second touch panel interconnects (19b, 25a). Repellency to the alignment films (9a, 9b) is imparted to at least a portion of a top portion of each of the touch pins (P).
    Type: Grant
    Filed: June 17, 2009
    Date of Patent: August 13, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takehiko Sakai, Dai Chiba, Yoshiharu Kataoka, Takuya Watanabe, Shogo Nishiwaki, Kazunori Morimoto
  • Patent number: 8411212
    Abstract: A touch electrode and a detection element are positioned in at least two of pixels. The touch electrode is formed in a first substrate, and is positioned so as to face a counter electrode. The touch electrode contacts the counter electrode and is electrically connected thereto when a second substrate is pressed and bent toward the first substrate. The detection element is connected to the touch electrode, and detects the electrical connection between the touch electrode and the counter electrode.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: April 2, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Dai Chiba, Takehiko Sakai, Tetsuo Fujita, Kazunori Morimoto, Yoshiharu Kataoka, Shogo Nishiwaki
  • Patent number: 8390771
    Abstract: A device includes: an active matrix substrate (20a) including a plurality of first display lines (11a) extending parallel to each other and a plurality of second display lines extending parallel to each other in a direction crossing the first display lines (11a); and a counter substrate (30a) including a black matrix (B) provided so as to overlap the first display lines (11a) and the second display lines, wherein the active matrix substrate (20a) includes a plurality of touch panel lines (11b) extending parallel to each other in a direction in which the first display lines (11a) extend, and portions of the black matrix (B) overlapping the second display lines are electrically conductive and are configured so as to come into contact with the touch panel lines (11b) when the surface of the active matrix substrate (20a) or the counter substrate (30a) is pressed.
    Type: Grant
    Filed: June 22, 2009
    Date of Patent: March 5, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takehiko Sakai, Dai Chiba, Yoshiharu Kataoka, Takuya Watanabe
  • 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: 20130029932
    Abstract: A composition for external use on skin that can be spread evenly on the skin, does not produce a liquid residue as a result of temperature change, and can suppress a feeling of sliminess of xanthan gum is provided. There are provided a composition for external use on skin containing 0.1% by mass to 10% by mass of a component (A) (a water-soluble polymer obtained by mixing agar with xanthan gum) and 30% by mass or more of a component (D) (water); the composition for external use on skin containing 0.5% by mass to 40% by mass of a divalent polyol as a component (B); the composition for external use on skin according to any one of the above compositions, which contains moisturizers as a component (C); and the composition for external use on skin according to any one of the above compositions, which contains oil as a component (E).
    Type: Application
    Filed: March 14, 2011
    Publication date: January 31, 2013
    Applicant: This Nisshin Oillio Group, Ltd.s
    Inventors: Hisanori Kachi, Makoto Matsuzawa, Minaho Ookubo, Keiichi Oyama, Aki Gotou, Masaaki Kojima, Takehiko Sakai, Junichi Itou
  • 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
  • Publication number: 20120069282
    Abstract: The present invention provides a liquid crystal display device capable of reducing a white tinge phenomenon in a vertical alignment mode having at least a pair of comb-shaped electrodes. The present invention provides a liquid crystal display device including a pair of substrates disposed opposite each other, and a liquid crystal layer sandwiched between the pair of substrates, wherein one of the pair of substrates includes a pair of comb-shaped electrodes, the pair of electrodes are disposed opposite each other planarly within a pixel, the liquid crystal layer contains 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 relative to surfaces of the pair of substrates when no voltage is applied, and two or more regions differing from each other in an interval between the pair of electrodes are formed within the pixel.
    Type: Application
    Filed: April 20, 2010
    Publication date: March 22, 2012
    Inventors: Tsuyoshi Okazaki, Takehiko Sakai, Katsuhiko Morishita, Shingo Kawashima, Dai Chiba, Tetsuo Fujita
  • Publication number: 20120057118
    Abstract: Provided is a liquid crystal display device in which transmittance can be enhanced. The present invention provides a liquid crystal display device provided with a pair of substrates and a liquid crystal layer sandwiched between the pair of substrates. One of the substrates has a comb-shaped first electrode and a comb-shaped second electrode. The first electrode includes a first trunk portion and a first branch portion obliquely connected to the first trunk portion. The second electrode includes a second trunk portion and a second branch portion obliquely connected to the second trunk portion. The liquid crystal layer includes a p-type nematic liquid crystal that is vertically aligned with respect to the surfaces of the substrates when no voltage is applied. Each pixel has a blank portion of the second electrode having an acute angle-shaped blank portion and an obtuse angle-shaped blank portion that are mutually adjacent.
    Type: Application
    Filed: April 20, 2010
    Publication date: March 8, 2012
    Inventors: Katsuhiko Morishita, Tsuyoshi Okazaki, Takehiko Sakai, Dai Chiba, Tetsuo Fujita, Shingo Kawashima
  • Publication number: 20120050246
    Abstract: The present invention provides a liquid crystal display device which can suppress generation of a locally luminous part where a dark line disappears.
    Type: Application
    Filed: February 18, 2010
    Publication date: March 1, 2012
    Inventors: Kazunori Morimoto, Takehiko Sakai, Tetsuo Fujita, Dai Chiba, Katsuhiko Morishita, Tsuyoshi Okazaki
  • Patent number: 8098350
    Abstract: There are provided a display that can block light so that a display on an image display device is invisible from a wide range of view angles in an oblique direction, and a view angle control element employed therein. In a narrow view angle state, a view angle control liquid crystal panel (2) prevents light in a predetermined wavelength region that has been incident at a polar angle of ?H or more from being transmitted through a polarizing plate (22) by using a phase difference imparted by a liquid crystal cell (21). In the narrow view angle state, a view angle control liquid crystal panel (3) prevents light that has been incident at a polar angle of ?L or more, among light that has been transmitted through the polarizing plate (22), from being transmitted through a polarizing plate (32) by using a phase difference imparted by a liquid crystal cell (31). Consequently, light forming a polar angle of ?L or more is blocked as a whole, which allows the narrow view angle state to cover a wide range.
    Type: Grant
    Filed: June 19, 2008
    Date of Patent: January 17, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takehiko Sakai, Dai Chiba, Katsuhiko Morishita, Yoshiharu Kataoka, Chikanori Tsukamura