Image forming device with beam current control

Claim 2

An image forming device comprising: a cold cathode member, comprising a semiconductor, for generating an electron beam; an accelerating electrode member for withdrawing the electron beam generated by said cathode member; a member for modulating the electron beam; a member for deflecting the electron beam; an image forming member for forming an image by irradiation by the electron beam, wherein the accelerating electrode member is integrally molded together with said cold cathode member on a side of said image forming member relative to said cold cathode member through an electrical isolator; a detecting means for detecting a current flowing to said accelerating electrode member, which current is caused by a part of the electron beam generated by said cold cathode member; and a control means for outputting a control signal in proportion to the current detected, wherein variation with time of quantity of the electrons emitted per unit time from said cold cathode member to said image forming member is hindered by supplying the control signal from said control means to a power source of said cold cathode member or of said accelerating electrode member.

Claim 3

An image forming device comprising: a cold cathode member comprising at least two cold cathode type solid electron beam generating elements arranged in parallel, each comprising a semiconductor, for generating an electron beam; an accelerating electrode member, for each cold cathode type solid electron beam generating element, for withdrawing the electron beam generated by its respective said cold cathode type solid electron beam generating element; a member for modulating the electron beam; a member for deflecting the electron beam; an image forming member for forming an image by irradiation by the electron beam, wherein each accelerating electrode member is disposed on a side of said image forming means relative to said cold cathode type solid electron beam generating element therefor in a state of being electrically isolated from said cold cathode type solid electron beam generating element; a detecting means for detecting a current flowing to each accelerating electrode member; and a control means for outputting a control signal in proportion to the current detected flowing to each accelerating electrode member. wherein variation with time of quantity of the electrons emitted per unit time from each cold cathode type solid electron beam generating element to said image forming member is hindered by supplying the control signal from said control means to a power source of each cold cathode type solid electron beam generating element or of the accelerating electrode member therefor.

Claim 4

An image forming device comprising: a cold cathode member comprising at least two cold cathode type solid electron beam generating elements arranged in parallel, each comprising a semiconductor, for generating an electron beam; an accelerating electrode member, for each cold cathode type solid electron beam generating element, for withdrawing the electron beam generated by its respective said cold cathode type solid electron beam generating element; a member for modulating the electron beam; a member for deflecting the electron beam; an image forming member for forming an image by irradiation by the electron beam, wherein each accelerating electrode member is disposed on a side of said image forming means relative to said cold cathode type solid electron beam generating element therefor in a state of being electrically isolated from said cold cathode type solid electron beam generating element; a detecting means for detecting a current flowing to each accelerating electrode member; and a control means for outputting a control signal in proportion to the current detected flowing to each accelerating electrode member. wherein variation with time of quantity of the electrons emitted per unit time from each cold cathode type solid electron beam generating element to said image forming member is hindered by supplying the control signal from said control means to a power source of each cold cathode type solid electron beam generating element or of the accelerating electrode member therefor.

Claim 5

An image forming device comprising: a cold cathode member, comprising a semiconductor, for generating an electron beam; an accelerating electrode member for withdrawing the electron beam generated by said cathode member; a member for modulating the electron beam; a member for deflecting the electron beam; an image forming member for forming an image by irradiation by the electron beam, wherein the accelerating electrode member is disposed on a side of said image forming means relative to said cold cathode member in a state of being electrically isolated from said cold cathode member; a detecting means for detecting a current flowing to said accelerating electrode member; and a control means for outputting a control signal in proportion to the current detected. wherein variation with time of quantity of the electrons emitted per unit time from said cold cathode member to said image forming member is hindered by supplying the control signal from said control means to a power source of said cold cathode member or of said accelerating electrode member, and wherein said cold cathode member is a cathode member which generates the electron beam by supplying a reverse voltage to said semiconductor, said semiconductor having a p-n junction.

Claim 6

An image forming device comprising: a cold cathode member, comprising a semiconductor, for generating an electron beam; an accelerating electrode member for withdrawing the electron beam generated by said cathode member; a member for modulating the electron beam; a member for deflecting the electron beam; an image forming member for forming an image by irradiation by the electron beam, wherein the accelerating electrode member is disposed on a side of said image forming means relative to said cold cathode member in a state of being electrically isolated from said cold cathode member; a detecting means for detecting a current flowing to said accelerating electrode member; and a control means for outputting a control signal in proportion to the current detected. wherein variation with time of quantity of the electrons emitted per unit time from said cold cathode member to said image forming member is hindered by supplying the control signal from said control means to a power source of said cold cathode member or of said accelerating electrode member, and wherein said cold cathode member is a cathode member which generates the electron beam by supplying a reverse voltage to said semiconductor, said semiconductor having a p-n junction.

Claim 7

An image forming device according to claim 1, wherein said cold cathode member is a cathode member which generates the electron beam by supplying a forward voltage to said semiconductor, said semiconductor having a p-n junction.

Claim 8

An image forming device according to claim 1, wherein said cold cathode member and said accelerating electron member are integrated.

Claim 9

An image forming device having an electron beam generating device provided with a plurality of electron beam generating sections, each comprising a cold cathode member, arranged two-dimensionally and a deflecting means capable of scanning the electron beams emitted by said electron beam generating device to a member to be irradiated successively to sections of a region of the member to be irradiated, wherein a correcting means is provided for correcting image distortion compared with original image data for each of the sections of the region, and the electron beam generating device is driven according to the image data from the correcting means.

Claim 10

An image forming device having an electron beam generating device provided with a plurality of electron beam generating sections, each comprising a cold cathode member, arranged two-dimensionally and a deflecting means capable of scanning the electron beams emitted by said electron beam generating device to a member to be irradiated successively to sections of a region of the member to be irradiated, wherein a correcting means is provided for correcting image distortion compared with original image data for each of the sections of the region, and the electron beam generating device is driven according to the image data from the correcting means.

Claim 11

An image forming device having an electron beam generating device provided with a plurality of electron beam generating sections arranged two-dimensionally and a deflecting means, for deflecting electron beams emitted from said electron beam generating device in an X direction and in a Y direction perpendicular to the X direction, capable of scanning the electron beams emitted by said electron beam generating device to a member to be irradiated successively to sections of a region of the member to be irradiated, wherein a correcting means is provided for correcting image distortion compared with original image data for each of the sections of the region, and the electron beam generating device is driven according to the image data from the correcting means.

Claim 12

An image forming device having an electron beam generating device provided with a plurality of electron beam generating sections arranged two-dimensionally and a deflecting means, for deflecting electron beams emitted from said electron beam generating device in an X direction and in a Y direction perpendicular to the X direction, capable of scanning the electron beams emitted by said electron beam generating device to a member to be irradiated successively to sections of a region of the member to be irradiated, wherein a correcting means is provided for correcting image distortion compared with original image data for each of the sections of the region, and the electron beam generating device is driven according to the image data from the correcting means.

Claim 13

An image forming device comprising: a cold cathode member, comprising a semiconductor, for generating an electron beam; an accelerating electrode member for withdrawing the electron beam generated by said cathode member; a member for modulating the electron beam; an image forming member for forming an image by irradiation of the electron beam; wherein said accelerating electrode member is integrally molded together with said cold cathode member on a side of said image forming member relative to said cold cathode member through an electrical isolator; a detecting means for detecting a current flowing to said accelerating electrode member, which current is caused by a part of the electron beam generated by said cold cathode member; and a control means for outputting a control signal in proportion to the current detected, wherein variation with time of quantity of the electrons emitted per unit time from said cold cathode member to said image forming member is kept within a range of ±5% by supplying the control signal from said control means to a power source of the cold cathode member.

Claim 14

An image forming device comprising: a cold cathode member, comprising a semiconductor, for generating an electron beam; an accelerating electrode member for withdrawing the electron beam generated by said cathode member; a member for modulating the electron beam; an image forming member for forming an image by irradiation of the electron beam; wherein said accelerating electrode member is integrally molded together with said cold cathode member on a side of said image forming member relative to said cold cathode member through an electrical isolator; a detecting means for detecting a current flowing to said accelerating electrode member, which current is caused by a part of the electron beam generated by said cold cathode member; and a control means for outputting a control signal in proportion to the current detected, wherein variation with time of quantity of the electrons emitted per unit time from said cold cathode member to said image forming member is kept within a range of ±5% by supplying the control signal from said control means to a power source of the cold cathode member.

Claim 15

An image forming device according to claim 8, wherein said cold cathode member is a cathode member which generates the electron beam by supplying a forward voltage to said semiconductor, said semiconductor having a p-n junction.

Claim 16

An image forming device according to claim 8, wherein said cold cathode member and said accelerating electron member are integrated.

Claim 17

An image forming device comprising: a cold cathode member comprising at least two cold cathode type solid electron beam generating elements arranged in parallel, each comprising a semiconductor, for generating an electron beam; an accelerating electrode member, for each cold cathode type solid electron beam generating element, for withdrawing the electron beam generated by its respective said cold cathode solid electron beam generating element; a member for modulating the electron beams; an image forming member for forming an image by irradiation of the electron beams; wherein each accelerating electrode member is placed on a side of said image forming means relative to said cold cathode solid electron generating element therefor in a state of being electrically isolated from said cold cathode solid electron beam generating element; a detecting means for detecting a current flowing to each accelerating electrode member; and a control means for outputting a control signal in proportion to the current detected in each detecting means, wherein variation with time of current caused by electrons irradiated onto said image forming member is kept within a range of ±5% by supplying the control signal from said control means to a power source of the each cold cathode solid electron beam generating element.

Claim 18

An image forming device comprising: a cold cathode member comprising at least two cold cathode type solid electron beam generating elements arranged in parallel, each comprising a semiconductor, for generating an electron beam; an accelerating electrode member, for each cold cathode type solid electron beam generating element, for withdrawing the electron beam generated by its respective said cold cathode solid electron beam generating element; a member for modulating the electron beams; an image forming member for forming an image by irradiation of the electron beams; wherein each accelerating electrode member is placed on a side of said image forming means relative to said cold cathode solid electron generating element therefor in a state of being electrically isolated from said cold cathode solid electron beam generating element; a detecting means for detecting a current flowing to each accelerating electrode member; and a control means for outputting a control signal in proportion to the current detected in each detecting means, wherein variation with time of current caused by electrons irradiated onto said image forming member is kept within a range of ±5% by supplying the control signal from said control means to a power source of the each cold cathode solid electron beam generating element.

Claim 19

An image forming device comprising: a cold cathode member, comprising a semiconductor, for generating an electron beam; an accelerating electrode member for withdrawing the electron beam generated by said cathode member; a member for modulating the electron beam; an image forming member for forming an image by irradiation of the electron beam; wherein said accelerating electrode member is placed on a side of said image forming means relative to said cold cathode member in a state of being electrically isolated from said cold cathode member; a detecting means for detecting a current flowing to said accelerating electrode member; and a control means for outputting a control signal in proportion to the current detected, wherein variation with time of current caused by electrons irradiated onto said image forming member is kept within a range of ±5% by supplying the control signal from said control means to a power source of the cold cathode member, and wherein said cold cathode member is a cathode member which generates the electron beam by supplying a reverse voltage to said semiconductor, said semiconductor having a p-n junction.

Claim 20

An image forming device comprising: a cold cathode member, comprising a semiconductor, for generating an electron beam; an accelerating electrode member for withdrawing the electron beam generated by said cathode member; a member for modulating the electron beam; an image forming member for forming an image by irradiation of the electron beam; wherein said accelerating electrode member is placed on a side of said image forming means relative to said cold cathode member in a state of being electrically isolated from said cold cathode member; a detecting means for detecting a current flowing to said accelerating electrode member; and a control means for outputting a control signal in proportion to the current detected, wherein variation with time of current caused by electrons irradiated onto said image forming member is kept within a range of ±5% by supplying the control signal from said control means to a power source of the cold cathode member, and wherein said cold cathode member is a cathode member which generates the electron beam by supplying a reverse voltage to said semiconductor, said semiconductor having a p-n junction.

Claim 21

An image forming device comprising: a cold cathode member, comprising a semiconductor, for generating an electron beam; an accelerating electrode member for withdrawing the electron beam generated by said cathode member; a member for modulating the electron beam; a member for deflecting the electron beam; an image forming member for forming an image by irradiation of the electron beam; wherein said accelerating electrode member is integrally molded together with said cold cathode member on a side of the image forming member relative to said cold cathode member through an electrical isolator; a detecting means for detecting current flowing to said accelerating electrode member, which current is caused by a part of the electron beam generated by said cold cathode member; and a control means for outputting a control signal in proportion to the current detected, wherein variation with time of of quantity of the electrons emitted per unit time from said cold cathode member to said image forming member is kept within a range of ±6% by supplying the control signal from said control means to a power source of said accelerating electrode member.

Claim 22

An image forming device comprising: a cold cathode member, comprising a semiconductor, for generating an electron beam; an accelerating electrode member for withdrawing the electron beam generated by said cathode member; a member for modulating the electron beam; a member for deflecting the electron beam; an image forming member for forming an image by irradiation of the electron beam; wherein said accelerating electrode member is integrally molded together with said cold cathode member on a side of the image forming member relative to said cold cathode member through an electrical isolator; a detecting means for detecting current flowing to said accelerating electrode member, which current is caused by a part of the electron beam generated by said cold cathode member; and a control means for outputting a control signal in proportion to the current detected, wherein variation with time of of quantity of the electrons emitted per unit time from said cold cathode member to said image forming member is kept within a range of ±6% by supplying the control signal from said control means to a power source of said accelerating electrode member.

Claim 23

An image forming device comprising: a cold cathode member comprising at least two cold cathode solid electron beam generating elements arranged in parallel, each comprising a semiconductor, for generating an electron beam; an accelerating electrode member for each cold cathode solid electron beam generation element for withdrawing the electron beam generated by its respective said cold cathode solid electron beam generating element; a member for modulating the electron beams; a member for deflecting the electron beams; an image forming member for forming an image by irradiation of the electron beams; wherein said accelerating electrode member for each cold cathode solid electron beam generating element is placed on a side of the image forming means relative to said cold cathode solid electron beam generating element in a state of being electrically isolated from said cold cathode solid electron beam generating element; a detecting means for detecting current flowing to each accelerating electrode member; and a control means for outputting a control signal in proportion to the current detected, wherein variation with time of current caused by electrons irradiated onto said image forming member is kept within a range of ±6% by supplying the control signal from said control means to a power source of each accelerating electrode member.

Claim 24

An image forming device comprising: a cold cathode member comprising at least two cold cathode solid electron beam generating elements arranged in parallel, each comprising a semiconductor, for generating an electron beam; an accelerating electrode member for each cold cathode solid electron beam generation element for withdrawing the electron beam generated by its respective said cold cathode solid electron beam generating element; a member for modulating the electron beams; a member for deflecting the electron beams; an image forming member for forming an image by irradiation of the electron beams; wherein said accelerating electrode member for each cold cathode solid electron beam generating element is placed on a side of the image forming means relative to said cold cathode solid electron beam generating element in a state of being electrically isolated from said cold cathode solid electron beam generating element; a detecting means for detecting current flowing to each accelerating electrode member; and a control means for outputting a control signal in proportion to the current detected, wherein variation with time of current caused by electrons irradiated onto said image forming member is kept within a range of ±6% by supplying the control signal from said control means to a power source of each accelerating electrode member.

Claim 25

An image forming device comprising: a cold cathode member, comprising a semiconductor, for generating an electron beam; an accelerating electrode member for withdrawing the electron beam generated by said cathode member; a member for modulating the electron beam; a member for deflecting the electron beam; an image forming member for forming an image by irradiation of the electron beam; wherein said accelerating electrode member is placed on a side of the image forming means relative to said cold cathode member in a state of being electrically isolated from said cold cathode member; a detecting means for detecting current flowing to said accelerating electrode member; and a control means for outputting a control signal in proportion to the current detected, wherein variation with time of current caused by electrons irradiated onto said image forming member is kept within a range of ±6% by supplying the control signal from said control means to a power source of said accelerating electrode member, and wherein said cold cathode member is a cathode member which generates the electron beam by supplying a reverse voltage to said semiconductor, said semiconductor having a p-n junction.

Claim 26

An image forming device comprising: a cold cathode member, comprising a semiconductor, for generating an electron beam; an accelerating electrode member for withdrawing the electron beam generated by said cathode member; a member for modulating the electron beam; a member for deflecting the electron beam; an image forming member for forming an image by irradiation of the electron beam; wherein said accelerating electrode member is placed on a side of the image forming means relative to said cold cathode member in a state of being electrically isolated from said cold cathode member; a detecting means for detecting current flowing to said accelerating electrode member; and a control means for outputting a control signal in proportion to the current detected, wherein variation with time of current caused by electrons irradiated onto said image forming member is kept within a range of ±6% by supplying the control signal from said control means to a power source of said accelerating electrode member, and wherein said cold cathode member is a cathode member which generates the electron beam by supplying a reverse voltage to said semiconductor, said semiconductor having a p-n junction.

Claim 27

An image forming device according to claim 13, wherein said cold cathode member is a cathode member which generates the electron beam by supplying a forward voltage to said semiconductor, said semiconductor having a p-n junction.

Claim 28

An image forming device according to claim 13, wherein said cold cathode member and said accelerating electron member are integrated.