Title:
CONTROLLER OF PLOT HEAD FOR ELECTROPHOTOGRAPH
Document Type and Number:
Japanese Patent JPS62258559
Kind Code:
A
Abstract:
PURPOSE:To suppress the deterioration in the picture quality basedon the sot whose intensity is deficient by controlling the sum of outputs of a spot whose intensity is deficient and an adjacent spot so as to be equal to the sum of the outputs of other spots. CONSTITUTION:A picture signal outputted from a memory 20 is latched by a latch circuit 22. A control section 23 outputs an enable signal VE having a duty ratio in response to the luminous intensity of the light spot 26 of a light emitting diode array to an AND circuit 24, its AND output turns on/off a transistor 25 to drive each spot 26. The duty ratio of the enable signal is brought into 100% to the spot with deficient rating, the sum of outputs of adjacent spots is made equal to the sum of outputs of other spots. As a result, the deterioration in the picture quality by the spot with deficient rating is suppressed.
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Inventors:
YAMASHITA JUN
Application Number:
JP10177186A
Publication Date:
November 11, 1987
Filing Date:
May 01, 1986
Export Citation:
Assignee:
FUJI XEROX CO LTD
International Classes:
B41J2/44; B41J2/45; B41J2/455; H04N1/036; H04N1/23; H04N1/40; (IPC1-7): B41J3/21; H04N1/036; H04N1/40
Attorney, Agent or Firm:
Tadao Hirata
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