Patents by Inventor Kazuya Ueda

Kazuya Ueda 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: 7515214
    Abstract: The invention relates to a liquid crystal display used as a display section of an electronic apparatus and provides a liquid crystal display having high chromaticity characteristics and viewing angle characteristics. A configuration is employed which includes substrates having electrodes on respective surfaces thereof opposite to each other, a liquid crystal sealed between the substrates, and a pixel region including a low effective voltage area in which an effective voltage applied to the liquid crystal is lower than a voltage applied between the electrodes, the low effective voltage area occupying part of the region in a predetermined area ratio, the pixel region having a threshold voltage that varies between the low effective voltage area and another area.
    Type: Grant
    Filed: March 24, 2004
    Date of Patent: April 7, 2009
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kazuya Ueda, Tsuyoshi Kamada, Hidefumi Yoshida, Yoshio Koike, Kenji Okamoto
  • Patent number: 7508385
    Abstract: The invention relates to a liquid crystal display device used for a display part of an information equipment and a driving method thereof, and has an object to provide a liquid crystal display device in which excellent viewing angle characteristics can be obtained and a driving method thereof. When a relatively high level data voltage is applied to a gate electrode of a TFT, a driving voltage is applied to a liquid crystal layer for a long time and a white display is realized. When a relatively low level data voltage is applied to the gate electrode of the TFT, the driving voltage is not applied to the liquid crystal layer, and a black display is realized. When an intermediate data voltage between the high level and the low level is applied to the gate electrode of the TFT, the TFT keeps an on state for a time determined by a time constant depending on a capacitance and a resistance. The driving voltage is applied to the liquid crystal layer for the on time.
    Type: Grant
    Filed: February 26, 2003
    Date of Patent: March 24, 2009
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kazuya Ueda, Hidefumi Yoshida, Yuichi Inoue, Yoshio Koike
  • Publication number: 20090073097
    Abstract: The liquid crystal display comprises a first substrate including a first pixel electrode and a second pixel electrode, a second substrate with an opposed electrode formed on, and a liquid crystal layer sealed between the first substrate and the second substrate. The thickness d1 of the liquid crystal layer on the first pixel electrode in the first pixel region is larger than the thickness d2 of the liquid crystal layer on the second pixel electrode in the second pixel region. The first pixel region includes a first partial region and a second partial region where the threshold voltage is higher than in the first partial region. The second pixel region includes a third partial region and a fourth partial region where the threshold voltage is higher than in the third partial region.
    Type: Application
    Filed: November 3, 2008
    Publication date: March 19, 2009
    Applicants: FUJITSU LIMITED, AU OPTRONICS CORPORATION
    Inventors: Kazuya Ueda, Tsuyoshi Kamada, Hidefumi Yoshida, Yoshio Koike, Kenji Okamoto
  • Publication number: 20090059148
    Abstract: The invention relates to a liquid crystal display based on an MVA mode of multi-division alignment in which alignment states of liquid crystal molecules having a negative dielectric anisotropy are made different from each other, and provides a liquid crystal display in which a drop in transmittance is suppressed and response characteristics are improved.
    Type: Application
    Filed: October 30, 2008
    Publication date: March 5, 2009
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Kazutaka Hanaoka, Seiji Tanuma, Yohei Nakanishi, Kazuya Ueda, Shingo Kataoka, Takahiro Sasaki, Arihiro Takeda, Hideaki Tsuda, Takatoshi Mayama, Yuichi Inoue, Norio Sugiura
  • Patent number: 7499132
    Abstract: A liquid crystal display including a pair of substrates arranged opposite to each other, electrodes respectively formed on opposite surfaces of the pair of substrates, and an alignment regulating structural member, formed on at least one of the pair of substrates, and which includes at least one of a linear projection arranged on the electrode and a slit portion formed by removing a part of an electrode material of the electrode.
    Type: Grant
    Filed: January 5, 2005
    Date of Patent: March 3, 2009
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kazutaka Hanaoka, Seiji Tanuma, Yohei Nakanishi, Kazuya Ueda, Shingo Kataoka, Takahiro Sasaki, Arihiro Takeda, Hideaki Tsuda, Takatoshi Mayama, Yuichi Inoue, Norio Sugiura
  • Patent number: 7499127
    Abstract: First and second polarization plates are disposed on both sides of a liquid crystal panel in which thicknesses of a liquid crystal layer are set up depending on colors of color filters. Then, a first retardation film is disposed between the liquid crystal panel and the first polarization film, and a second retardation film is disposed between the liquid crystal panel and the second polarization film. Assuming that a maximum value of a refractive index in an in-plane direction out of principal indices of refraction is Nx, that a refractive index in an orthogonal direction to the direction of the refractive index which has the value of Nx is Ny, and that a thickness is d, the first and second retardation films are set to satisfy a difference in values of (Nx?Ny)×d equal to or less than 10 nm.
    Type: Grant
    Filed: March 2, 2005
    Date of Patent: March 3, 2009
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masakazu Shibasaki, Hidefumi Yoshida, Kazuya Ueda
  • Patent number: 7486361
    Abstract: The invention relates to a transflective liquid crystal display capable of display in both of transmissive and reflective modes and a method of manufacturing the same and provides a transflective liquid crystal display which can achieve high display characteristics in both of the transmissive and reflective modes.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: February 3, 2009
    Assignees: Fujitsu Limited, Au Optronics Corporation
    Inventors: Hidefumi Yoshida, Yasutoshi Tasaka, Kunihiro Tashiro, Katsufumi Ohmuro, Tsuyoshi Kamada, Kazuya Ueda, Masakazu Shibasaki
  • Patent number: 7474292
    Abstract: A picture element electrode is divided into sub picture element electrodes by slits extending obliquely. Further, a control electrode is formed over an auxiliary capacitance bus line. Part of the sub picture element electrodes overlaps the control electrode and is capacitively coupled to the control electrode. The control electrode and the source electrode of a TFT are connected through an interconnection. Part of the sub picture element electrodes is electrically connected to the interconnection. Further, part of the sub picture element electrodes is electrically connected to an interconnection extending from the control electrode.
    Type: Grant
    Filed: January 26, 2005
    Date of Patent: January 6, 2009
    Assignees: Fujitsu Limited, Au Optronics Corporation
    Inventors: Tsuyoshi Kamada, Takashi Sasabayashi, Kazuya Ueda, Hidefumi Yoshida
  • Patent number: 7466295
    Abstract: The liquid crystal display comprises a first substrate 2 including a first pixel electrode 12a and a second pixel electrode 12b, a second substrate 4 with an opposed electrode 22 formed on, and a liquid crystal layer 6 sealed between the first substrate 2 and the second substrate 4. The thickness d1 of the liquid crystal layer 6 on the first pixel electrode 12a in the first pixel region 8R, 8G is larger than the thickness d2 of the liquid crystal layer 6 on the second pixel electrode 12b in the second pixel region 8B. The first pixel region 8R, 8G includes a first partial region 11a, and a second partial region 13a where the threshold voltage is higher than in the first partial region 11a. The second pixel region 8B includes a third partial region 11b, and a fourth partial region 13b where the threshold voltage is higher than in the third partial region 11b.
    Type: Grant
    Filed: July 14, 2004
    Date of Patent: December 16, 2008
    Assignees: Fujitsu Limited, AU Optronics Corporation
    Inventors: Kazuya Ueda, Tsuyoshi Kamada, Hidefumi Yoshida, Yoshio Koike, Kenji Okamoto
  • Patent number: 7433005
    Abstract: The invention relates to a liquid crystal display device used as a display part of an information equipment and a method of manufacturing the same, and has an object to provide the liquid crystal display device which can obtain excellent display characteristics without raising the manufacture cost and the method of manufacturing the same.
    Type: Grant
    Filed: March 30, 2004
    Date of Patent: October 7, 2008
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hidefumi Yoshida, Yasutoshi Tasaka, Kazuya Ueda, Tsuyoshi Kamada, Masakazu Shibasaki, Kunihiro Tashiro
  • Publication number: 20080204649
    Abstract: The invention relates to a substrate for a liquid crystal display used in a display section of an information apparatus and a liquid crystal display having the same and provides a substrate for a liquid crystal display and a liquid crystal display having the same that provide good display characteristics without any increase in manufacturing steps. A configuration is employed which includes a plurality of gate bus lines formed on a substrate substantially in parallel with each other, a plurality of drain bus lines formed on the substrate such that they intersect the gate bus lines with an insulation film interposed therebetween, pixel regions provided on the substrate in the form of a matrix, pixel electrodes having a plurality of electrode units formed in the pixel regions, slits formed between the electrode units, and connection electrodes for connecting the plurality of electrode units with each other and a thin film transistor formed at each pixel region.
    Type: Application
    Filed: January 23, 2008
    Publication date: August 28, 2008
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Hidefumil Yoshida, Yasutoshi Tasaka, Takashi Sasabayashi, Takahiro Sasaki, Arihiro Takeda, Kazuya Ueda
  • Patent number: 7391490
    Abstract: The invention relates to liquid crystal displays used in television receivers and display sections of electronic apparatus and, more particularly, to a liquid crystal display in which a polymeric material included in a liquid crystal material is polymerized to impart a pre-tilt angle to the liquid crystal material. The invention provides a liquid crystal display in which gradation/luminance characteristics in an oblique direction are improved and in which reduction in luminance is suppressed. The liquid crystal display includes a TFT substrate and an opposite substrate provided opposite to each other and a liquid crystal composition including a liquid crystal material and a polymer sealed between the substrates.
    Type: Grant
    Filed: January 17, 2006
    Date of Patent: June 24, 2008
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yohei Nakanishi, Tsuyoshi Kamada, Kazuya Ueda, Hideaki Tsuda
  • Publication number: 20080143940
    Abstract: The invention relates to a liquid crystal display device used as a display part of an information equipment and a method of manufacturing the same, and has an object to provide the liquid crystal display device which can obtain excellent display characteristics without raising the manufacture cost and the method of manufacturing the same.
    Type: Application
    Filed: October 31, 2007
    Publication date: June 19, 2008
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Hidefumi Yoshida, Yasutoshi Tasaka, Kazuya Ueda, Tsuyoshi Kamada, Masakazu Shibasaki, Kunihiro Tashiro, Tetsuya Kobayashi
  • Publication number: 20080111964
    Abstract: A liquid crystal display device includes a drive substrate, a counter substrate, a spacer, a liquid crystal layer, and an aperture pattern. The drive substrate is configured to have arranged pixel electrodes. The counter substrate is configured to have a counter electrode common to a plurality of pixels. The spacer is configured to have a column shape and be interposed between the drive substrate and the counter substrate that are so disposed that the pixel electrodes and the counter electrode face each other. The liquid crystal layer is configured to be provided and sealed between the drive substrate and the counter substrate. The aperture pattern in which the spacer is enclosed is provided in the counter electrode.
    Type: Application
    Filed: June 1, 2007
    Publication date: May 15, 2008
    Applicant: SONY CORPORATION
    Inventors: Yasuhiro Shirasaka, Kazuya Ueda, Yoshiki Nakamura, Yumiko Tatemori
  • Patent number: 7342629
    Abstract: The invention relates to a liquid crystal display device used as a display part of an information equipment and a method of manufacturing the same, and has an object to provide the liquid crystal display device which can obtain excellent display characteristics without raising the manufacture cost and the method of manufacturing the same.
    Type: Grant
    Filed: October 24, 2005
    Date of Patent: March 11, 2008
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hidefumi Yoshida, Yasutoshi Tasaka, Kazuya Ueda, Tsuyoshi Kamada, Masakazu Shibasaki, Kunihiro Tashiro
  • Publication number: 20080055529
    Abstract: Disclosed herein is a liquid crystal display device. The liquid crystal display device includes: a first substrate; a second substrate; a liquid crystal layer; a first electrode part; and a second electrode part. The first electrode part includes a pixel electrode formed in the pixel area and a peripheral electrode formed in the peripheral area. The second electrode part includes a pixel electrode part formed in the pixel area and a peripheral electrode formed in the peripheral area. The peripheral electrode of at least one of the first electrode part and the second electrode part is formed by a plurality of electrodes adjacent to each other. Voltage values of driving voltages applied to the respective electrodes adjacent to each other of the peripheral electrode are different from each other.
    Type: Application
    Filed: August 16, 2007
    Publication date: March 6, 2008
    Inventors: Yasuhiro Shirasaka, Kazuya Ueda, Hirohide Fukumoto, Hisashi Kadota
  • Patent number: 7319501
    Abstract: A slit pattern, which is an orientation control element extending in an oblique direction relative to an edge of a pixel electrode on a surface of a TFT substrate, is formed in the pixel electrode to extend in a substantially parallel direction to an extending direction of a bank-shaped pattern. Furthermore, as an orientation control element, fine slit patterns (concave portions in the pixel electrode) are formed locally in a part near the edge of the pixel electrode except in the pixel electrode to extend in an oblique direction relative to an extending direction of the edge.
    Type: Grant
    Filed: September 18, 2003
    Date of Patent: January 15, 2008
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Arihiro Takeda, Shingo Kataoka, Tsuyoshi Kamada, Kazuya Ueda, Takahiro Sasaki
  • Publication number: 20070273813
    Abstract: The invention relates to a transflective liquid crystal display capable of display in both of transmissive and reflective modes and a method of manufacturing the same and provides a transflective liquid crystal display which can achieve high display characteristics in both of the transmissive and reflective modes.
    Type: Application
    Filed: May 24, 2007
    Publication date: November 29, 2007
    Inventors: Hidefumi Yoshida, Yasutoshi Tasaka, Kunihiro Tashiro, Katsufumi Ohmuro, Tsuyoshi Kamada, Kazuya Ueda, Masakazu Shibasaki
  • Patent number: 7302021
    Abstract: In a digital broadcast receiving apparatus for amplifying a received modulated digital signal wave with automatically adjusted gain and demodulating the modulated signal wave to a digital signal, a tuner frequency-converts the modulated digital signal wave to generate a first modulated signal. A first automatic gain control amplification unit controls gain of the tuner to make a level of the first modulated signal at a first predetermined level. An A/D converter converts the first modulated signal into a second modulated signal. A demodulator demodulates the second modulated signal to generate a first demodulated digital signal. A second automatic gain control amplifier generates a second demodulated digital signal where frequency fluctuations included in the digital modulated wave are eliminated.
    Type: Grant
    Filed: June 12, 2001
    Date of Patent: November 27, 2007
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takaaki Konishi, Hiroshi Azakami, Kazuya Ueda, Naoya Tokunaga
  • Patent number: 7289178
    Abstract: The invention relates to a liquid crystal display used as a display section of an electronic apparatus and a method of manufacturing the same, and it is aimed at providing a liquid crystal display which can achieve high viewing angle characteristics and a method of manufacturing the same. A configuration is employed which includes a pair of substrates provided opposite to each other, a liquid crystal sealed between the pair of substrates, protrusions formed on at least one of the pair of substrates for regulating the alignment of the liquid crystal, and a plurality of pixel regions having both of a first area in which the protrusions are disposed at first intervals a2 and which has a first threshold voltage for driving of the liquid crystal and a second area in which the protrusions are disposed at second intervals a2 smaller than the first intervals and which has a second threshold voltage lower than the first threshold voltage.
    Type: Grant
    Filed: December 12, 2005
    Date of Patent: October 30, 2007
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takashi Sasabayashi, Arihiro Takeda, Hiroyasu Inoue, Kazuya Ueda, Yoshio Koike, Hideaki Tsuda, Yasutoshi Tasaka, Hidefumi Yoshida, Kunihiro Tashiro, Tsuyoshi Kamada, Kimiaki Nakamura