Patents Assigned to Hitachi Chiba Electronics, LTD
  • Patent number: 6721019
    Abstract: There is provided a highly reliable screen input type display device using a touch panel which can facilitate the control of a gap formed between upper and lower substrates and can stabilize the linearity of the resistance value detection of a resistance film, whereby an erroneous detection of coordinated can be eliminated. For this purpose, a tape-like conductive pressure sensitive adhesive member, which is formed by sandwiching a metal foil with conductive pressure sensitive adhesive material, is used at a connection portion between an upper wiring electrode mounted on an upper resistance film formed on an upper substrate and an inter-substrate connection wiring electrode formed on a lower substrate.
    Type: Grant
    Filed: April 20, 2001
    Date of Patent: April 13, 2004
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd., Hitachi Chiba Electronics, Ltd.
    Inventors: Masao Kono, Akira Kakinuma, Koji Ishii, Haruhisa Otsuka, Kazuo Ishii
  • Patent number: 6529188
    Abstract: The present invention is provided for preventing the occurrence of cracks on an upper resistance film 11 derived from the repeated push inputting manipulation so as to eliminate the erroneous operation of coordinates detection. To achieve such an object, an upper substrate 4A having the upper resistance film 11 formed on an inner surface of a soft film member and a lower substrate 4B having a lower resistance film 12 formed on an inner surface of a hard plate are laminated with each other while inserting dot spacers 90 in a gap defined between opposing surfaces of the respective resistance films 11, 12, an input inoperable region NR where the upper substrate 4A is bent toward the lower substrate 4B is provided to a periphery of an input region AR by the push inputting manipulation, and a stress attenuating member 100A which gradually decreases a height thereof from the seal region SL side to the input region AR side is provided to the input inoperative region NR.
    Type: Grant
    Filed: February 14, 2001
    Date of Patent: March 4, 2003
    Assignees: Hitachi, Ltd., Hitachi Chiba Electronics, LTD
    Inventor: Shigeki Suzuki