Image forming apparatus which changes its tone reproducing property in accordance with ambient conditions

Claim 2

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.

Claim 3

An apparatus according to claim 1, wherein the input data are produced by reading original by a CCD.

Claim 4

An apparatus according to claim 1, wherein the input data are produced from an original by a CCD and an A/D converter.

Claim 5

An apparatus according to claim 1, wherein said detecting means detects a humidity.

Claim 6

An apparatus according to claim 1, wherein said detecting means detects a humidity and a temperature.

Claim 7

An apparatus according to claim 1, wherein said image forming means including an electrophotographic photosensitive member and latent image forming means for forming a latent image thereon.

Claim 8

An apparatus according to claim 1, wherein said changing means adds to data of the stored table data in accordance with an output of said detecting means.

Claim 9

An apparatus according to claim 1, wherein said changing means modifies the stored table using a coefficient in accordance with an output of said detecting means.

Claim 10

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.

Claim 11

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.

Claim 12

An apparatus according to claim 9, wherein the light information corresponds to color separated images of a full-color image, and said developing means develops the latent images with yellow, magenta and cyan developers.

Claim 13

An apparatus according to claim 10, wherein the light information is data produced by reading an original by a CCD.

Claim 14

An apparatus according to claim 10, wherein the light information is data produced by reading an original by a CCD and an A/D converter.

Claim 15

An apparatus according to claim 10, wherein said apparatus is an electrophotographic copying apparatus.

Claim 16

An apparatus according to claim 9, wherein said optical scanning means uses a laser beam.

Claim 17

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.

Claim 18

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.

Claim 19

An apparatus according to claim 15, wherein the light information corresponds to color separated images of a full-color image, and said developing means develops the latent images with yellow, magenta and cyan developers.

Claim 20

An apparatus according to claim 16, wherein the light information is data produced by reading an original by a CCD.

Claim 21

An apparatus according to claim 16, wherein the light information is data produced by reading an original by a CCD and an A/D converter.

Claim 22

An apparatus according to claim 16, wherein said apparatus is an electrophotographic copying apparatus.

Claim 23

An apparatus according to claim 15, wherein said optical scanning means uses a laser beam.

Claim 24

An apparatus according to claim 15, wherein said changing means adds to data of the stored table data in accordance with an output of said detecting means.

Claim 25

An apparatus according to claim 15, wherein said changing means modifies the stored table using a coefficient in accordance with an output of said detecting means.

Claim 26

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.

Claim 27

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.

Claim 28

An apparatus according to claim 23, wherein the light information corresponds to color separated images of a full-color image, and said developing means develops the latent images with yellow, magenta and cyan developers.

Claim 29

An apparatus according to claim 24, wherein the light information is data produced by reading an original by a CCD.

Claim 30

An apparatus according to claim 24, wherein the light information is data produced by reading an original by a CCD and an A/D converter.

Claim 31

An apparatus according to claim 24, wherein said apparatus is an electrophotographic copying apparatus.

Claim 32

An apparatus according to claim 23, wherein said optical scanning means uses a laser beam.

Claim 33

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.

Claim 34

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.

Claim 35

An apparatus according to claim 29, wherein the light information corresponds to color separated images of a full-color image, and said developing means develops the latent images with yellow, magneta and cyan developers.

Claim 36

An apparatus according to claim 30, wherein the light information is data produced by reading an original by a CCD.

Claim 37

An apparatus according to claim 30, wherein the light information is data produced by reading an original by a CCD and an A/D converter.

Claim 38

An apparatus according to claim 30, wherein said apparatus is an electrophotographic copying apparatus.

Claim 39

An apparatus according to claim 29, wherein said optical scanning means uses a laser beam.

Claim 40

An apparatus according to claim 29, wherein said changing means adds to data of the stored table data in accordance with an output of said detecting means.

Claim 41

An apparatus according to claim 29, wherein said changing means modifies the stored table using a coefficient in accordance with an output of said detecting means.