Photocopying – Contact printing – Light boxes
Patent
1993-11-24
1995-12-19
Grimley, A. T.
Photocopying
Contact printing
Light boxes
355208, 382155, 395 3, G03G 1500
Patent
active
054773083
ABSTRACT:
An image forming apparatus is designed to compensate for voltage to be applied to an exposure lamp and a charger in accordance with changes in the density of a toner image formed on a photoreceptor that occur from its initial state to its final state after an image forming operation. More specifically, the density of a reference toner image is measured by a toner-density sensor. The amount of change in the density is measured beginning with its initial state by a subtracter, and the amount of compensation for the voltage required for obtaining the optimum image quality is found. By using these amounts of compensation as teaching data, learning is made as to the relationship between the amount of change in the density and the amount of compensation in a neurocomputer. Upon forming an image, the neurocomputer executes operations in accordance with the contents of the learning based on an inputted amount of change in density, and finds an appropriate amount of compensation. With this arrangement, it is possible to constantly obtain copied images having stable image quality, and to lower the cost of image forming apparatuses by reducing the number of parts used for the sensors or other devices.
REFERENCES:
patent: 4647184 (1987-03-01), Russell et al.
patent: 4916488 (1990-04-01), Kimura
patent: 5031123 (1991-07-01), Narukawa
patent: 5065190 (1991-11-01), Nakagama et al.
patent: 5067160 (1991-11-01), Omata et al.
patent: 5075725 (1991-12-01), Rushing et al.
patent: 5162899 (1992-11-01), Naka et al.
patent: 5200783 (1993-04-01), Maeda et al.
patent: 5204718 (1993-04-01), Morita
patent: 5216463 (1993-06-01), Morita
patent: 5216470 (1993-06-01), Asanuma et al.
patent: 5220373 (1993-06-01), Kanaya
patent: 5258783 (1993-11-01), Sasanuma et al.
patent: 5315352 (1994-05-01), Nakane et al.
"Electrophotography Process Control Method Based On Neural Network and Fuzzy Theory" Technical Report of the Institute of Image Electronics, Jan. 24, 1992, pp. 25-30.
Iwakura Yoshie
Kazaki Yuichi
Maeda Yasutaka
Ohhashi Shin-ichirou
Ohnishi Kazuyuki
Conlin David G.
Dang T. A.
Fournier Kevin J.
Grimley A. T.
Sharp Kabushiki Kaisha
LandOfFree
Image forming apparatus having an image-quality correction funct does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Image forming apparatus having an image-quality correction funct, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image forming apparatus having an image-quality correction funct will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-995291