Photocopying – Contact printing – Light boxes
Patent
1993-12-09
1996-03-12
Braun, Fred L.
Photocopying
Contact printing
Light boxes
355214, 355246, G03G 1502, G03G 2100
Patent
active
054990793
ABSTRACT:
An image density control apparatus for controlling an image density on a photoconductor surface has a charger for charging the photoconductor surface uniformly. A laser beam is scanned over the photoconductor surface to form a standard latent image having an electric potential distribution on the photoconductor surface. A potential detector detects an electric potential distribution of the standard latent image, and a developer develops a standard toner image from the standard latent image. A density detector detects a density of the standard toner image. Based on the detected electric potential distribution and the detected density, an appropriate gradation correction data is selected. The appropriate gradation correction data is selected by first selecting a gradation correction table group in accordance with the detected electric potential distribution and second selecting a gradation correction data from the gradation correction table group in accordance with the detected density.
REFERENCES:
patent: 5206686 (1983-04-01), Fukui et al.
patent: 5274424 (1993-12-01), Hattori et al.
patent: 5305057 (1994-04-01), Hattori et al.
patent: 5311215 (1994-05-01), Hattori et al.
patent: 5343233 (1994-08-01), Abe
Kinoshita Takeru
Yamada Takanobu
Braun Fred L.
Minolta Camera Kabushiki Kaisha
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