Color image forming apparatus and color measurement controlling method therefor
AssigneeCanon Kabushiki Kaisha
InventorToshiki Nakayama
Life of this patent
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Abstract
A color image forming apparatus, when a white LED is made to emit light onto a color image so that the reflected light can be detected, changes a color measuring condition in adaptation to a reflectance predicted for the image from the forming condition of the color image to be detected. The amount of reflected light is detected by photodiodes, and the image forming condition is adjusted, based on the detected amount of reflected light of each color image. Thereby, irrespective of the reflectance of each color image, the color measurement of each color image is effected with good accuracy, and the hue and density of the color image to be detected are accurately detected, thereby to form a color image with excellent color reproduction.
Claims30
A color image forming apparatus comprising:
- an image forming unit which forms a color image on a recording material;
- a color measuring unit which optically measures each of colors of a plurality of patch images formed on a recording material by said image forming unit, by detecting each of reflected lights from the plurality of patch images;
- a measuring condition controller which variably sets a measuring condition of said color measuring unit in accordance with a patch image to be measured;
- and
- a forming condition controller which controls an image forming condition on a basis of a measuring result of said color measuring unit.
A color measurement controlling method for forming a color image on a recording material, comprising:
- an image forming step, of forming a plurality of a color image on a recording material;
- a setting step, of variably setting a measuring condition of said color measuring step in accordance with a patch image to be measured;
- a color measuring step of optically measuring each of colors of a plurality of patch images formed on a recording material in said image forming step, by detecting each of reflected lights from the plurality of patch images;
- and
- a controlling step, of controlling an image forming condition on a basis of a measuring result in said color measuring step.
Dependencies are inferred from the claim text.