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Image forming apparatus and driving method therefor

  • US 4,884,079 A
  • Filed: 01/19/1989
  • Issued: 11/28/1989
  • Est. Priority Date: 04/25/1984
  • Status: Expired due to Term
First Claim
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1. In an image forming apparatus comprising an exposure light source, a printer head which comprises a plurality of microshutters arranged in at least one line and each controlling the transmission or interruption of light from said exposure light source, and an image bearing member so disposed to be irradiated with light signals transmitted through the printer head;

  • the improvement whereineach of said plurality of microshutters is connected to one of a plurality of thin film transistors,said plurality of thin film transistors are divided into a plurality of groups each comprising a prescribed number of thin film transistors which are connected in common to one source line and are connected separately to different gate lines; and

    each of said different gate lines is commonly connected to a plurality of thin film transistors each belonging to one of said plurality of groups.

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