Patents by Inventor Hideki Katsura

Hideki Katsura 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).

  • Liquid crystal display device and manufacturing method thereof
    Patent number: 6844910
    Abstract: Relating to a method of manufacturing a liquid crystal display device, minimizing liquid crystal material loss and use of cleaning solvent, and providing a liquid crystal display device in which a seal pattern having few gap inconsistencies are taken as a objective. Liquid crystal material wraparound can be prevented by forming a seal stopper portion outside a peripheral seal portion, and in addition, by increasing the degree of symmetry of the seal pattern and by forming a damming portion between injection ports, gap inconsistencies within the liquid crystal display device can be reduced.
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: January 18, 2005
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Hideki Katsura
  • Liquid crystal display device, and method of manufacturing the same
    Patent number: 6842211
    Abstract: A technique for providing a liquid crystal display device which has an excellent production yield but little orientation fault. A liquid crystal display device in which an orientation regulating member 108 including a trunk portion 108a and a branch portion 108b is formed between a seal member 112 and a liquid crystal 114 so that not only a mechanical strength is enhanced but also the liquid crystal molecules can be homogeneously arrayed to establish a satisfactory black level when no voltage is applied, thereby to improve the contrast.
    Type: Grant
    Filed: November 1, 2001
    Date of Patent: January 11, 2005
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Hideki Katsura
  • Liquid crystal display device, and method of manufacturing the same
    Publication number: 20020051112
    Abstract: A technique for providing a liquid crystal display device which has an excellent production yield but little orientation fault.
    Type: Application
    Filed: November 1, 2001
    Publication date: May 2, 2002
    Inventor: Hideki Katsura
  • Electro-optical device
    Publication number: 20020017645
    Abstract: An object of the present invention is to provide a pixel structure capable of shielding light between a TFT and a pixel without using a light shielding mask (black matrix) in an electro-optical display device. The present invention has a feature in that, as one of means for shielding light, a lamination film consisting of two colored layers (a lamination layer of a red-colored layer and a blue-colored layer) is formed on an opposing substrate as a light shielding portion so as to overlap with a TFT formed on a device electrode.
    Type: Application
    Filed: May 3, 2001
    Publication date: February 14, 2002
    Applicant: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Yuugo Goto, Hideki Katsura
  • Liquid crystal display device and manufacturing method thereof
    Publication number: 20010015786
    Abstract: Relating to a method of manufacturing a liquid crystal display device, minimizing liquid crystal material loss and use of cleaning solvent, and providing a liquid crystal display device in which a seal pattern having few gap inconsistencies are taken as a objective. Liquid crystal material wraparound can be prevented by forming a seal stopper portion outside a peripheral seal portion, and in addition, by increasing the degree of symmetry of the seal pattern and by forming a damming portion between injection ports, gap inconsistencies within the liquid crystal display device can be reduced.
    Type: Application
    Filed: December 28, 2000
    Publication date: August 23, 2001
    Inventor: Hideki Katsura