Optical printer head

Details Optical printer head Optical printer head

1990-11-29

1994-04-05

Fuller, Benjamin R.

Recorders

Light or beam recording

Including record receiver or handling means therefor

346108, G01D 1514

Patent

active

053009541

ABSTRACT:
A light emitting region of light emitting elements is so configured as to extend in an elongated fashion along the direction of movement of a photosensitive drum to prevent the area of exposure in the direction of movement of the drum from becoming unreasonably small. The width of the light emitting region of the light emitting elements is reduced to restrain unreasonable expanse of emitted light beams. Further, arrangement is made to provide greater current density thereby to obtain increased light intensity, and the distribution of current is equalized to provide uniform light brightness. Through development of finer and more intense light beams in this way, it is possible to inhibit unreasonable expanse of light beams thereby to enable each single light emitting diode to provide sufficient exposure intensity. Thus, the width of continuously printed lines, the width of intermittently printed lines, and the diameter of each dot in one dot printing can be substantially equalized. Therefore, the optical printer head according to the invention provides for good improvement in print equality.

REFERENCES:
patent: 4074318 (1978-02-01), Kapes, Jr.
patent: 4253102 (1981-02-01), Kataoka et al.
patent: 4383262 (1983-05-01), Noguchi
patent: 4553148 (1985-11-01), Behrens et al.
patent: 4775896 (1988-10-01), Umeda et al.
patent: 4897672 (1990-01-01), Horiuchi et al.
patent: 4928122 (1990-05-01), Doi et al.
patent: 4956684 (1990-09-01), Urata
IBM Technical Disclosure Bulletin, "Light-Emitting GaAs Diode", by M. Michelitsch, vol. 8, No. 11, Apr. 1966.

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