Color image forming method and apparatus
AssigneeKonica Corporation
InventorsKazuyoshi Tanaka, Toshifumi Isobe, Masahiko Itaya, Akiko Naganuma
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Abstract
A color image forming method and apparatus for sequentially forming toner images of a plurality of colors on a photosensitive body so as to form a color toner image. The method and apparatus maintain a substantially constant developing bias so that a first exposure potential of a photosensitive surface and a second exposure potential of the photosensitive surface are substantially equal to one another.
Claims13
A color image forming apparatus comprising:
- image data storing means for storing color image data for a plurality of colors;
- image data converting means for converting the color image data for the plurality of colors into corrected color image data for each color in a predetermined color sequence;
- means for irradiating a laser light onto a photosensitive surface on the basis of said corrected color image data to successively create an exposure potential and thereby form a latent image for each color in the predetermined color sequence;
- and
- means for maintaining a substantially constant developing bias so that a first exposure potential of the photosensitive surface and a second exposure potential of the photosensitive surface are substantially equal to one another, wherein the second exposure potential is provided while an image formed by developing a latent image formed by the first exposure potential is present on the photosensitive surface.
A color image forming method for forming color images comprising selecting color image data of mono-color from color image data of a plurality of colors, irradiating a laser light onto a uniformly electrically charged photosensitive surface on the basis of the selected color image data to form a latent image on said photosensitive surface and developing said latent image to form toner images of a plurality of colors sequentially characterized by that exposure potential provided by a first image exposure is equalized substantially to a surface potential of a toner layer provided by exposure on the toner layer by modulation of light intensity of said laser light.
A color image forming apparatus comprising:
- image data storing means for storing color image data for a plurality of colors;
- image data converting means for converting the color image data for the plurality of colors into color image data for mono-color in a predetermined color sequence;
- means for irradiating a laser light onto a photosensitive surface on the basis of said color image data of mono-color, which has been transmitted in parallel from the image data converting means, to successively create an exposure potential and thereby form a latent image for each color in the predetermined color sequence, wherein a substantially constant developing bias is maintained so that a first exposure potential of the photosensitive surface and a second exposure potential of the photosensitive surface are substantially equal to one another, wherein the second exposure potential is provided while an image formed by developing a latent image formed by the first exposure potential is present on the photosensitive surface;
- means for transmitting color image data for mono-color, which color image data forms a pixel, simultaneously in parallel from the image data converting means to the irradiating means;
- and
- means for developing the latent image for each color in the predetermined color sequence to form toner images of a plurality of colors.
Dependencies are inferred from the claim text.