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US 5,313,308 AGranted
Image forming apparatus which changes its tone reproducing property in accordance with ambient conditions
AssigneeCanon Kabushiki Kaisha
InventorsTakashi Hasegawa, Sono Gu
Life of this patent
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Abstract
A color image forming apparatus includes an electrophotographic photosensitive member; a device for forming latent images by optical scanner with light information corresponding to colors; plural developing devices for developing in different colors; a detector for an ambient condition; and a device for changing a tone reproducing property of the latent image forming device using one of stored tables in accordance with an output of the detector.
Claims36
An image forming apparatus, comprising:
- means for forming an image from image input data on a recording material with a tone reproducing property;
- means for detecting an ambient condition;
- and
- means for changing the tone reproducing property of said image forming means in accordance with a parameter determined by predetermined tables made for a plurality of predetermined ambient conditions, wherein when the detected ambient condition is deviated from any of said predetermined ambient conditions, the parameter is determined by interpolation using said tables.
1 more element
A color image forming apparatus, comprising:
- an electrophotographic photosensitive member;
- means for forming latent images by optical scanning means with light information corresponding to colors;
- plural developing means for developing in different colors;
- means for detecting an ambient condition;
- and
- means for changing a tone reproducing property of said image forming means in accordance with a parameter determined by predetermined tables made for a plurality of predetermined ambient conditions, wherein when the detected ambient condition is deviated from any of said predetermined ambient conditions, the parameter is determined by interpolation using said tables.
3 more elements
A color image forming apparatus, comprising:
- an electrophotographic photosensitive member;
- means for forming latent images by optical scanning means with light information corresponding to colors;
- plural developing means for developing in different colors;
- means for detecting an ambient condition;
- and
- means for changing a tone reproducing property of said image forming means in accordance with a parameter determined by predetermined tables made for a plurality of predetermined ambient conditions, wherein when the detected ambient condition is deviated from any of said predetermined ambient conditions, the parameter is determined by interpolation using said tables.
3 more elements
A color image forming apparatus, comprising:
- an electrophotographic photosensitive member;
- means for forming latent images by optical scanning means with light information corresponding to colors;
- plural developing means for developing in different colors;
- means for detecting an ambient condition;
- means for changing a tone reproducing property of said image forming means in accordance with a parameter determined by predetermined tables made for a plurality of predetermined ambient conditions, wherein when the detected ambient condition is deviated form any of said predetermined ambient conditions, the parameter is determined by interpolation using said tables;
- and
- means for receiving an output of said charging means, for comparing it with a predetermined triangular wave and for producing a pulse-width-modulated binary signal to drive said optical scanning means.
4 more elements
A color image forming apparatus, comprising:
- an electrophotographic photosensitive member;
- means for forming latent images by optical scanning means with light information corresponding to colors;
- plural developing means for developing in different colors;
- means for detecting an ambient condition;
- means for changing a tone reproducing property of said image forming means in accordance with a parameter determined by predetermined tables made for a plurality of predetermined ambient conditions, wherein when the detected ambient condition is deviated from any of said predetermined ambient conditions, the parameter is determined by interpolation using said tables;
- and
- means for receiving an output of said changing means, for comparing it with a predetermined triangular wave and for producing a pulse-width-modulated binary signal to drive said optical scanning means.
4 more elements
Dependencies are inferred from the claim text.