LED printbar aging compensation using I-V slope characteristics

Details LED printbar aging compensation using I-V slope characteristics LED printbar aging compensation using I-V slope characteristics

1995-10-19

1999-01-12

Le, N.

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

347237, B41J 245, B41J 247, B41J 2435

Patent

active

058596585

ABSTRACT:
An apparatus for compensating LED printbars, and printers which use LED printbars, for aging. Changes in the slopes of the forward voltage drop verses forward current characteristics (the I-V characteristics) of the LEDs of the LED printbar are determined. The drive currents of the LEDs are then changed as a function of the changes in the slopes so as to compensate for changes in the LED light outputs.

REFERENCES:
patent: 4525729 (1985-06-01), Agulnek et al.
patent: 4689694 (1987-08-01), Yoshida
patent: 4706130 (1987-11-01), Yamakawa
patent: 4780731 (1988-10-01), Creutzmann et al.
patent: 4831395 (1989-05-01), Pham et al.
patent: 4897672 (1990-01-01), Horiuchi et al.
patent: 4952949 (1990-08-01), Uebbing
patent: 5016027 (1991-05-01), Uebbing
patent: 5025322 (1991-06-01), Ng
patent: 5138337 (1992-08-01), Ng
patent: 5623300 (1997-04-01), Itoh et al.

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