Patents Assigned to Chowa Giken Kabushiki-Kaisha
  • Patent number: 4368404
    Abstract: This invention is related to a matrix-type fluorescent indicator lamp which is formed of a matrix by making a number of grid thin wires 13 arranged in parallel intersect perpendicular to a number of anode thin wires 11 arranged in parallel within a sealed tube being composed of a glass cover 6 and an insulated substrate 8, and which displays characters and figures as a dotted pattern by making the fluorescent material-applied anode thin wires luminous spot-like where the anode thin wires 11 intersect the grid thin wires 13. In the lamp, said anode thin wires 11 are mutually arranged in parallel not being in contact with the insulated substrate 8 so as to densify luminous spots narrowing the pitch between the anode thin wires 11 arranged in parallel.
    Type: Grant
    Filed: December 13, 1979
    Date of Patent: January 11, 1983
    Assignee: Chowa Giken Kabushiki-Kaisha
    Inventor: Ikuo Daisyaku