Adaptive control electrophotographic apparatus

Claim 2

An adaptive control electrophotographic apparatus comprising: charging means for charging a photoconductive substance of the electrophotographic apparatus with a predetermined voltage of static electricity, exposing means for forming latent image of static electricity of a reference mark on said photoconductive substance by applying light emitted from light emitting means activated by an input voltage and reflected from said reference mark, developer means for generating visible image of said latent image on said photoconductive substance by supplying toner which is biased by a predetermined developer bias voltages, density sensor means for detecting density of said visible image of said reference mark formed on said photoconductive substance, input variation vector generating means for generating a plurality of input variation vectors for varying said voltage of static electricity, said input voltage and said developer bias voltage applied to said electrophotographic apparatus to be controlled, qualitative model calculation means for outputting predictive sign data by applying calculation to said input variation vector on the basis of a predetermined qualitative model, error sign detection means for detecting the sign of a difference between an aimed density value and the detected value of said density sensor means, an input variation vector selection circuit for selecting an input variation vector on the basis of the output of said error sign detection means and said predictive sign data, output sign detecting means for detecting a predetermined sign for representing variation of output value of said electrophotographic apparatus to be controlled, input vector renewal means for adding said selected input variation vector to said voltage of static electricity, said input voltage and said developer bias voltage of said electrophotographic apparatus to be controlled, and qualitative model correction means for correcting said qualitative model on the basis of said input of said electrophotographic apparatus to be controlled and said output detected by said output sign detecting means.

Claim 3

An adaptive control electrophotogaphic apparatus comprising: charging means for charging a photoconductive substance of the electrophotographic apparatus with a predetermined voltage of static electricity, exposing means for forming latent image of static electricity of a reference mark on said photoconductive substance by applying light emitted from light emitting means activated by an input voltage and reflected from said reference mark, developer means for generating visible image of said latent image on said photoconductive substance by using toner which is biased by a predetermined developer bias voltages, density sensor means for detecting density of said visible image of said reference mark formed on said photoconductive substance, input variation vector generating means for generating a plurality of input variation vectors for varying said voltage of static electricity, said input voltage and said developer bias voltage applied to said electrophotographic apparatus to be controlled, qualitative model calculation means for outputting predictive sign data by applying calculation to said input variation vector on the basis of a predetermined qualitative model, error sign detection means for detecting the sign of a difference between an aimed density value and the detected value of said density sensor means, an input variation vector selection circuit for selecting an input variation vector on the basis of the output of said error sign detected means and said predictive sign data, and input vector renewal means for adding said selected input variation vector to said voltage of static electricity, said input voltage and said developer bias voltage of said to be controlled.

Claim 4

An adaptive control electrophotogaphic apparatus comprising: charging means for charging a photoconductive substance of the electrophotographic apparatus with a predetermined voltage of static electricity, exposing means for forming latent image of static electricity of a reference mark on said photoconductive substance by applying light emitted from light emitting means activated by an input voltage and reflected from said reference mark, developer means for generating visible image of said latent image on said photoconductive substance by using toner which is biased by a predetermined developer bias voltages, density sensor means for detecting density of said visible image of said reference mark formed on said photoconductive substance, input variation vector generating means for generating a plurality of input variation vectors for varying said voltage of static electricity, said input voltage and said developer bias voltage applied to said electrophotographic apparatus to be controlled, qualitative model calculation means for outputting predictive sign data by applying calculation to said input variation vector on the basis of a predetermined qualitative model, error sign detection means for detecting the sign of a difference between an aimed density value and the detected value of said density sensor means, an input variation vector selection circuit for selecting an input variation vector on the basis of the output of said error sign detected means and said predictive sign data, and input vector renewal means for adding said selected input variation vector to said voltage of static electricity, said input voltage and said developer bias voltage of said to be controlled.

Claim 5

An adaptive control electrophotogaphic apparatus in accordance with claim 1 or 2 further comprises: transfer means for transferring said visible image to a transfer member, and density sensor means for detecting density of said visible image of said reference mark formed on said transfer member.

Claim 6

An adaptive control electrophotographic apparatus comprising: charging means for charging a photoconductive substance of the electrophotographic apparatus with a predetermined voltage of static electricity, exposing means for forming latent image of static electricity of a reference mark on said photoconductive substance by applying light emitted from light emitting means activated by an input voltage to said reference mark, developer means for generating visible image of said latent image on said photoconductive substance by supplying toner which is biased by a predetermined developer bias voltages, transfer means for transferring said visible image to a transfer member, being applied with a transfer voltage, density sensor means for detecting density of said visible image of said reference mark formed on said transfer member, input variation vector generating means for generating a plurality of input variation vectors for varying said voltage of static electricity, said input voltage and said developer bias voltage applied to said electrophotographic apparatus to be controlled, qualitative model calculation means for outputting predictive sign data by applying calculation to said input variation vector on the basis of a predetermined qualitative model, error sign detection means for detecting the sign of a difference between an aimed density value and the detected value of said density sensor means, an input variation vector selection circuit for selecting an input variation vector on the basis of the output of said error sign detection means and said predictive sign data, output sign detecting means for detecting a predetermined sign for representing variation of output value of said electrophotographic apparatus to be controlled, input vector renewal means for adding said selected input variation vector to said voltage of static electricity, said input voltage, said developer bias voltage and transfer voltage of said electrophotographic apparatus to be controlled, and qualitative model correction means for correcting said qualitative model on the basis of said input of said electrophotographic apparatus to be controlled and said output detected by said output sign detecting means.

Claim 7

An adaptive control electrophotographic apparatus comprising: charging means for charging a photoconductive substance of the electrophotographic apparatus with a predetermined voltage of static electricity, exposing means for forming latent image of static electricity of a reference mark on said photoconductive substance by applying light emitted from light emitting means activated by an input voltage to said reference mark, developer means for generating visible image of said latent image on said photoconductive substance by supplying toner which is biased by a predetermined developer bias voltages, transfer means for transferring said visible image to a transfer member, being applied with a transfer voltage, density sensor means for detecting density of said visible image of said reference mark formed on said transfer member, input variation vector generating means for generating a plurality of input variation vectors for varying said voltage of static electricity, said input voltage and said developer bias voltage applied to said electrophotographic apparatus to be controlled, qualitative model calculation means for outputting predictive sign data by applying calculation to said input variation vector on the basis of a predetermined qualitative model, error sign detection means for detecting the sign of a difference between an aimed density value and the detected value of said density sensor means, an input variation vector selection circuit for selecting an input variation vector on the basis of the output of said error sign detection means and said predictive sign data, output sign detecting means for detecting a predetermined sign for representing variation of output value of said electrophotographic apparatus to be controlled, input vector renewal means for adding said selected input variation vector to said voltage of static electricity, said input voltage, said developer bias voltage and transfer voltage of said electrophotographic apparatus to be controlled, and qualitative model correction means for correcting said qualitative model on the basis of said input of said electrophotographic apparatus to be controlled and said output detected by said output sign detecting means.

Claim 8

An adaptive control electrophotographic apparatus in accordance with claim 1, 2, 3, 4 or 5 wherein said reference mark comprises a high density mark and a low density mark.

Claim 9

An adaptive control electrophotographic apparatus in accordance with claim 1, 2, 3, 4 or 5 wherein said reference mark is located outward from a manuscript to be copied.