Recorders – Electric recording – Electrochemical
Patent
1992-07-02
1995-01-24
Miller, Jr., George H.
Recorders
Electric recording
Electrochemical
346160, G01D 1506, G01D 1514
Patent
active
053845919
ABSTRACT:
An electrophotographic recording device comprises a photoconductive drum which is rotated at a constant speed, a charger for charging a photoconductive surface of the photoconductive drum, a recording head which includes a large number of light emitting diodes arranged in a line, and which exposes the charged photoconductive surface, in order to form an electrostatic image corresponding to image data on the photoconductive surface, a developing unit for developing the electrostatic image into a toner image, a transfer unit for transferring the toner image onto a paper sheet, a fixing unit for fixing the toner image transferred onto the paper sheet, a line density decision circuit for deciding the line density of an image from the image data, and an emission time setting circuit for determining an emission time of the light emitting diodes in accordance with the line density detected by the decision circuit, the emission time setting circuit determining a first emission time in relation to image data to be printed with a first line density, and determining a second emission time shorter than the first emission time in relation to image data to be printed with a second line density higher than the first line density.
REFERENCES:
patent: 4746941 (1988-05-01), Pham et al.
patent: 4748465 (1988-05-01), Tsilibes et al.
patent: 4831395 (1989-05-01), Pham et al.
patent: 5189441 (1993-02-01), Fukui et al.
patent: 5200763 (1993-04-01), Tanuma et al.
Kazuhiro Samejima & Masaru Ohnishi, Compact LED Head, Technological Research Report of the Electronic Communcations Society, 1985, at 1-5.
Kabushiki Kaisha Toshiba
Miller Jr. George H.
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