Led print head and method of adjusting the focus thereof

Details Led print head and method of adjusting the focus thereof Led print head and method of adjusting the focus thereof

1996-06-18

1998-09-15

Metjahic, Safet

Incremental printing of symbolic information

Electric marking apparatus or processes

Electrostatic

347238, 347242, G03G 1304, B41J 2385

Patent

active

058087184

ABSTRACT:
An LED print head is for use in an LED printer. The LED print head has an LED circuit board on which a plurality of LED chips are mounted in line, and a lens assembly having rod lenses for focusing light emitted from the LED chips on a surface of a photosensitive drum in the LED printer. A first member or slider engages either the LED circuit board or the lens assembly and is adapted to displace stepwise to cause either the LED circuit board or the lens assembly to flex stepwise relative to the surface of the photosensitive drum. A second member or slider engages said first member to movably hold said first member. The LED circuit board or lens assembly is flexed so that a point on the photosensitive drum and the surface of the corresponding LED form a pair of conjugate points with respect to the corresponding rod lens.

REFERENCES:
patent: 5173759 (1992-12-01), Murano
patent: 5390670 (1995-02-01), Centa et al.
patent: 5495281 (1996-02-01), Nashida et al.
patent: 5504514 (1996-04-01), Nelson
patent: 5506612 (1996-04-01), Ogata et al.
patent: 5515097 (1996-05-01), Munechika et al.
patent: 5585783 (1996-12-01), Hall

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