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Patent Searching and Data


Title:
DISPLAY UNIT OPERATION CONTROL CIRCUIT
Document Type and Number:
Japanese Patent JPH05224619
Kind Code:
A
Abstract:

PURPOSE: To enable a device to perform the detection of a fault of a display unit which is visually performed in the display control circuit which supplies a driving current to a switch connected in series with the display unit and controls the illumination and extinction of the display unit.

CONSTITUTION: The series circuit of a switch part 12 connected in series with a display unit 13 is provided with a detection part 14 which detects the presence or absence of a current flowing to the display unit 13 and this circuit is equipped with a control part 11 which outputs a signal indicating that the display unit is faulty when the detection signal from the detection part 14 indicates the absence of a current even if the driving current is supplied to the switch part 12.


Inventors:
Togawa, Atsushi
Application Number:
JP1992000057573
Publication Date:
September 03, 1993
Filing Date:
February 10, 1992
Export Citation:
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Assignee:
KOKUSAI ELECTRIC CO LTD
International Classes:
G09G3/00; (IPC1-7): G09G3/00
Attorney, Agent or Firm:
大塚 学