Digital image forming apparatus with test image optimization

Details Digital image forming apparatus with test image optimization Digital image forming apparatus with test image optimization

1996-03-06

1998-10-13

Frahm, Eric

Facsimile and static presentation processing

Facsimile

Recording apparatus

358406, 399 49, 399 74, H04N 129, G03G 2100

Patent

active

058220798

ABSTRACT:
An image forming apparatus is provided which is immune to characteristic variations of a photoconductor and a developer material, which can detect the amount of toner adhering to a test toner image accurately, and which can always form a favorable image using an optimal image forming parameter. A predetermined test toner image is formed on the photoconductor using developing devices. The amount of toner adhering to the formed test toner image is detected by an AIDC sensor. A printer control unit determines grid potential Vg of a corona charger and development bias potential Vb of each developing device based on the detected amount of adhering toner. A predetermined image is formed using the determined grid potential and development bias potential. The printer control unit changes the image forming condition for the next test toner image based on the detected amount of adhering toner so that the amount of toner adhering to the next test toner image can be detected in a range of high detection sensitivity of the AIDC sensor.

REFERENCES:
patent: 5148289 (1992-09-01), Nishiyama et al.
patent: 5206686 (1993-04-01), Fukui et al.
patent: 5241347 (1993-08-01), Kodama
patent: 5266997 (1993-11-01), Nakane et al.
patent: 5315351 (1994-05-01), Matsushiro et al.
patent: 5583644 (1996-12-01), Sasanuma et al.

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