公开(公告)号：DE69122366T2

公开(公告)日：1997-02-06

申请号：DE69122366

申请日：1991-12-19

Applicant: XEROX CORP

Inventor： BUTLER MICHAEL A

IPC: G01N21/47 ,  G01N21/55 ,  G03G15/00 ,  G03G15/01 ,  G03G15/08 ,  G01N15/06

Abstract: An electrographic apparatus having a densitometer, which achieves improved measuring of marking particle density on a photoreceptor or the like. The measuring method detects both specular and diffuse light reflected off of the photoreceptor containing marking particles. A compensation ratio is generated from a high density marking particle patch, and is used to compensate the marking particle density to both changing environmental conditions and differences between individual machines. Thus, a more accurate specular signal is calculated which is an accurate indicator of toner density of mass per unit of area concentration. These concentration measures enable accurate adjustments of the electrographic apparatus color toner development systems.

公开(公告)号：DE69411430T2

公开(公告)日：1998-12-17

申请号：DE69411430

申请日：1994-02-23

Applicant: XEROX CORP

Inventor： THIERET TRACY E ,  HENDERSON THOMAS A ,  BUTLER MICHAEL A

IPC: G03G15/01 ,  G03G21/14 ,  B41J2/44 ,  G05B13/02 ,  G05B15/02 ,  H04N1/00 ,  H04N1/29

Abstract: A controls system architecture (110) for an image output terminal (IOT) has a hierarchical structure which isolates subsystem controls for purposes of efficient algorithm design, analysis and implementation. The architecture is preferably divided into three levels (1,2,3) and has a controls supervisor (112) which provides subsystem isolation functions and reliability assurance functions. The architecture improves image quality of IOT outputs by controlling the operation of the IOT to ensure that a toner reproduction curve of an output image matches a tone reproduction curve of an input image, despite several uncontrollable variables which change the tone reproduction curve of the output image.

公开(公告)号：DE69411430D1

公开(公告)日：1998-08-13

申请号：DE69411430

申请日：1994-02-23

Applicant: XEROX CORP

Inventor： THIERET TRACY E ,  HENDERSON THOMAS A ,  BUTLER MICHAEL A

IPC: G03G15/01 ,  G03G21/14 ,  B41J2/44 ,  G05B13/02 ,  G05B15/02 ,  H04N1/00 ,  H04N1/29

Abstract: A controls system architecture (110) for an image output terminal (IOT) has a hierarchical structure which isolates subsystem controls for purposes of efficient algorithm design, analysis and implementation. The architecture is preferably divided into three levels (1,2,3) and has a controls supervisor (112) which provides subsystem isolation functions and reliability assurance functions. The architecture improves image quality of IOT outputs by controlling the operation of the IOT to ensure that a toner reproduction curve of an output image matches a tone reproduction curve of an input image, despite several uncontrollable variables which change the tone reproduction curve of the output image.

公开(公告)号：DE69122366D1

公开(公告)日：1996-10-31

申请号：DE69122366

申请日：1991-12-19

Applicant: XEROX CORP

Inventor： BUTLER MICHAEL A

IPC: G01N21/47 ,  G01N21/55 ,  G03G15/00 ,  G03G15/01 ,  G03G15/08 ,  G01N15/06

Abstract: An electrographic apparatus having a densitometer, which achieves improved measuring of marking particle density on a photoreceptor or the like. The measuring method detects both specular and diffuse light reflected off of the photoreceptor containing marking particles. A compensation ratio is generated from a high density marking particle patch, and is used to compensate the marking particle density to both changing environmental conditions and differences between individual machines. Thus, a more accurate specular signal is calculated which is an accurate indicator of toner density of mass per unit of area concentration. These concentration measures enable accurate adjustments of the electrographic apparatus color toner development systems.

公开(公告)号：BR9400656A

公开(公告)日：1994-09-27

申请号：BR9400656

申请日：1994-02-23

Applicant: XEROX CORP

Inventor： THIERET TRACY E ,  HENDERSON THOMAS A ,  BUTLER MICHAEL A

IPC: B41J2/44 ,  G03G15/01 ,  G03G21/14 ,  G05B13/02 ,  G05B15/02 ,  H04N1/00 ,  H04N1/29 ,  G03C7/30

Abstract: A controls system architecture (110) for an image output terminal (IOT) has a hierarchical structure which isolates subsystem controls for purposes of efficient algorithm design, analysis and implementation. The architecture is preferably divided into three levels (1,2,3) and has a controls supervisor (112) which provides subsystem isolation functions and reliability assurance functions. The architecture improves image quality of IOT outputs by controlling the operation of the IOT to ensure that a toner reproduction curve of an output image matches a tone reproduction curve of an input image, despite several uncontrollable variables which change the tone reproduction curve of the output image.