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US5455597A
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Image-forming apparatus, and designation of electron beam diameter at image-forming member in image-forming apparatus
Assignee: TRI-POINT MEDICAL Corp
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Filing: 1993-12-23
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Granted: 1995-10-03
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Expires: 2013-12-23
Abstract
Abstract An image-forming apparatus is comprised of a substrate, an electron-emitting device which is provided on the substrate and includes an electron-emitting region between electrodes and emits electrons on application of voltage between the electrodes, and an image-forming member which forms an image on irradiation of an electron beam. A diameter S 1 of the electron beam on the image-forming member in direction of application of the voltage between the electrodes is given by Equation (I): S.sub.1 =K.sub.1 ·2d(V.sub.f /V.sub.a).sup.1/2 (I) where K 1 is a constant and 0.8≦K 1 ≦1.0, d is a distance between the substrate and the image-forming member, V f is a voltage applied between the electrodes, and V a is a voltage applied to the image-forming member. A method for designing a diameter of an electron beam at an image-forming member face of the image-forming apparatus is comprised of a diameter S 1 the electron beam at the image-forming member face in a direction of application of the voltage between the electrodes designed so as to satisfy the equation (I).
Inventors
- 👤 Naoto Nakamura
- 👤 Ichiro Nomura
- 👤 Hidetoshi Suzuki
- 👤 Yasue Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:04
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/30; H01J1/316; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/123; H01J31/125; H01J31/127; H01J2201/00; H01J2201/30; H01J2201/316; H01J2201/3165
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
126 words
An image-forming apparatus comprising: a substrate; an electron-emitting device provided on said substrate, said electron emitting device having an electron-emitting region between first and second electrodes and emitting electrons on application of a voltage between said electrodes; and an image-forming member which forms an image on irradiation of an electron beam, wherein a diameter S 1 of the electron beam on said image-forming member in a direction of application of the voltage between said electrodes is given by Equation (I): S.sub.1 =K.sub.1 ·2d(V.sub.f /V.sub.a).sup.1/2 (I), where K 1 is a constant and 0.8≦K 1 ≦1.0, d is a distance between said substrate and said image-forming member, V f is a voltage applied between said electrodes, and V a is a voltage applied to said image-forming member.
Claim 2
Dependent Claim
126 words
An image-forming apparatus comprising: a substrate; an electron-emitting device provided on said substrate, said electron emitting device having an electron-emitting region between first and second electrodes and emitting electrons on application of a voltage between said electrodes; and an image-forming member which forms an image on irradiation of an electron beam, wherein a diameter S 1 of the electron beam on said image-forming member in a direction of application of the voltage between said electrodes is given by Equation (I): S.sub.1 =K.sub.1 ·2d(V.sub.f /V.sub.a).sup.1/2 (I), where K 1 is a constant and 0.8≦K 1 ≦1.0, d is a distance between said substrate and said image-forming member, V f is a voltage applied between said electrodes, and V a is a voltage applied to said image-forming member.
Claim 3
Dependent Claim
31 words
The image-forming apparatus according to claim 1, further comprising a plurality of said electron-emitting devices, and electron beams emitted from respective electron-emitting regions form one picture element on said image-forming member.
Claim 4
Dependent Claim
30 words
The image-forming apparatus according to claim 2, wherein said plurality of electron emitting regions are placed between a pair of low voltage electrodes with interposition of a high potential electrode.
Claim 5
Dependent Claim
37 words
The image-forming apparatus according to claim 3, wherein the distance D between said plurality of electron-emitting regions in a voltage application direction satisfies Equation (II): K.sub.2 ·2d(V.sub.f /V.sub.a).sup.1/2 ≧D/2≧K.sub.3 ·2d(V.sub.f /V.sub.a).sup.1/2 (II) K.sub.2 =1.25±0.05, and K.sub.3 =0.35±0.05
Claim 6
Dependent Claim
21 words
The image-forming apparatus according to any of claims 1 to 4, wherein said electron-emitting device is a surface conduction electron-emitting device.
Claim 7
Dependent Claim
25 words
The image-forming apparatus according to any of claims 1 to 4, wherein said electron-emitting device and the image-forming member respectively have independent voltage application means.
Claim 8
Dependent Claim
31 words
The image-forming apparatus according to any of claims 1 to 4, further comprising modulation means for modulating the electron beam emitted from said electron-emitting device in accordance with an information signal.
Claim 9
Dependent Claim
144 words
An image-forming apparatus comprising: a substrate; an electron-emitting device provided on said substrate, said electron-emitting device having an electron-emitting region between first and second electrodes and emitting electrons on application of a voltage between said electrodes; and an image-forming member which forms an image on irradiation of an electron beam, wherein a diameter S 2 of the electron beam on said image-forming member in a direction perpendicular to the direction of application of the voltage between said electrodes is given by Equation (III): S.sub.2 =L+2K.sub.4 ·2d(V.sub.f /V.sub.a).sup.1/2 (III), where K 4 is a constant and 0.8≦K 4 ≦0.9, d is a distance between said substrate and said image-forming member, L is the length of said electron-emitting region perpendicular to the direction of voltage application, V f is a voltage applied between said electrodes, and V a is a voltage applied to said image-forming member.
Claim 10
Dependent Claim
144 words
An image-forming apparatus comprising: a substrate; an electron-emitting device provided on said substrate, said electron-emitting device having an electron-emitting region between first and second electrodes and emitting electrons on application of a voltage between said electrodes; and an image-forming member which forms an image on irradiation of an electron beam, wherein a diameter S 2 of the electron beam on said image-forming member in a direction perpendicular to the direction of application of the voltage between said electrodes is given by Equation (III): S.sub.2 =L+2K.sub.4 ·2d(V.sub.f /V.sub.a).sup.1/2 (III), where K 4 is a constant and 0.8≦K 4 ≦0.9, d is a distance between said substrate and said image-forming member, L is the length of said electron-emitting region perpendicular to the direction of voltage application, V f is a voltage applied between said electrodes, and V a is a voltage applied to said image-forming member.
Claim 11
Dependent Claim
19 words
The image-forming apparatus according to claim 8, wherein a plurality of said electron-emitting devices are placed on said substrate.
Claim 12
Dependent Claim
82 words
The image-forming apparatus according to claim 8, wherein a diameter S 1 of an electron beam on said image-forming member in a direction of application of the voltage between said electrodes is given by Equation (I) S.sub.1 =K.sub.1 ·2d(V.sub.f /V.sub.a).sup.1/2 (I), where K 1 is a constant and 0.8≦K 1 ≦1.0, d is a distance between said substrate and said image-forming member, V f is a voltage applied between said electrodes, and V a is a voltage applied to said image-forming member.
Claim 13
Dependent Claim
32 words
The image-forming apparatus according to claim 10, further comprising has a plurality of said electron-emitting devices, and electron beams emitted from respective electron-emitting regions form one picture element on said image-forming member.
Claim 14
Dependent Claim
30 words
The image-forming apparatus according to claim 11, wherein said plurality of electron emitting regions are placed between a pair of low voltage electrodes with interposition of a high potential electrode.
Claim 15
Dependent Claim
37 words
The image-forming apparatus according to claim 12, wherein a distance D between said plurality of electron-emitting regions in a voltage application direction satisfies Equation (II): K.sub.2 ·2d(V.sub.f /V.sub.a).sup.1/2 ≧D/2≧K.sub.3 ·2d(V.sub.f /V.sub.a).sup.1/2 (II) K.sub.2 =1.25±0.05, and K.sub.3 =0.35±0.05
Claim 16
Dependent Claim
21 words
The image-forming apparatus according to any of claims 8 to 13, wherein said electron-emitting device is a surface conduction electron-emitting device.
Claim 17
Dependent Claim
26 words
The image-forming apparatus according to any of claims 8 to 13, wherein said electron-emitting device and said image-forming member respectively have an independent voltage application means.
Claim 18
Dependent Claim
32 words
The image-forming apparatus according to any of claims 8 to 13, further comprising a modulation means for modulating the electron beam emitted from said electron-emitting device in accordance with an information signal.
Claim 19
Dependent Claim
138 words
An image-forming apparatus comprising: a substrate; a plurality of electron-emitting devices provided on said substrate, each electron-emitting device having an electron-emitting region between first and second electrodes and emitting electrons on application of a voltage between said respective electrodes; and an image-forming member which forms an image on irradiation of an electron beam, wherein said electron-emitting devices are arranged at an arrangement pitch P in a direction perpendicular to voltage application between said electrodes, and the pitch P satisfies Equation (IV): P<L+2K.sub.5 ·2d(V.sub.f /V.sub.a).sup.1/2 (IV), where K 5 =0.80, d is a distance between said substrate and said image-forming member, L is the length of said electron-emitting region in a direction perpendicular to the direction of voltage application, V f is a voltage applied between said electrodes, and V a is a voltage applied to said image-forming member.
Claim 20
Dependent Claim
138 words
An image-forming apparatus comprising: a substrate; a plurality of electron-emitting devices provided on said substrate, each electron-emitting device having an electron-emitting region between first and second electrodes and emitting electrons on application of a voltage between said respective electrodes; and an image-forming member which forms an image on irradiation of an electron beam, wherein said electron-emitting devices are arranged at an arrangement pitch P in a direction perpendicular to voltage application between said electrodes, and the pitch P satisfies Equation (IV): P<L+2K.sub.5 ·2d(V.sub.f /V.sub.a).sup.1/2 (IV), where K 5 =0.80, d is a distance between said substrate and said image-forming member, L is the length of said electron-emitting region in a direction perpendicular to the direction of voltage application, V f is a voltage applied between said electrodes, and V a is a voltage applied to said image-forming member.
Claim 21
Dependent Claim
16 words
The image-forming apparatus according to claim 17, wherein said electron-emitting devices are surface conduction electron-emitting devices.
Claim 22
Dependent Claim
22 words
The image-forming apparatus according to claim 17, wherein said electron-emitting devices and said image-forming member respectively have an independent voltage application means.
Claim 23
Dependent Claim
27 words
The image-forming apparatus according to claim 17, further comprising modulation means for modulating the electron beam emitted from said electron-emitting device in accordance with an information signal.
Claim 24
Dependent Claim
138 words
An image-forming apparatus comprising: a substrate; a plurality of electron-emitting devices provided on said substrate, each said electron emitting device having an electron-emitting region between first and second electrodes and emitting electrons on application of a voltage between said respective electrodes; and an image-forming member which forms an image on irradiation of an electron beam, wherein said electron-emitting devices are arranged at an arrangement pitch P in a direction perpendicular to voltage application between said electrodes, and the pitch P satisfies Equation (V): P≧L+2K.sub.6 ·2d(V.sub.f /V.sub.a).sup.1/2 (V), where K 6 =0.90, d is a distance between said substrate and said image-forming member, L is the length of said electron-emitting region perpendicular to the direction of voltage application, V f is a voltage applied between said respective electrodes, and V a is a voltage applied to said image-forming member.
Claim 25
Dependent Claim
138 words
An image-forming apparatus comprising: a substrate; a plurality of electron-emitting devices provided on said substrate, each said electron emitting device having an electron-emitting region between first and second electrodes and emitting electrons on application of a voltage between said respective electrodes; and an image-forming member which forms an image on irradiation of an electron beam, wherein said electron-emitting devices are arranged at an arrangement pitch P in a direction perpendicular to voltage application between said electrodes, and the pitch P satisfies Equation (V): P≧L+2K.sub.6 ·2d(V.sub.f /V.sub.a).sup.1/2 (V), where K 6 =0.90, d is a distance between said substrate and said image-forming member, L is the length of said electron-emitting region perpendicular to the direction of voltage application, V f is a voltage applied between said respective electrodes, and V a is a voltage applied to said image-forming member.
Claim 26
Dependent Claim
16 words
The image-forming apparatus according to claim 21, wherein said electron-emitting devices are surface conduction electron-emitting device.
Claim 27
Dependent Claim
22 words
The image-forming apparatus according to claim 21, wherein said electron-emitting devices and said image-forming member respectively have an independent voltage application means.
Claim 28
Dependent Claim
27 words
The image-forming apparatus according to claim 21, further comprising modulation means for modulating the electron beam emitted from said electron-emitting device in accordance with an information signal.
Claim 29
Independent Claim
130 words
A method for forming an image-forming apparatus comprising the steps of: providing a substrate with an electron-emitting device provided on the substrate and including an electron-emitting region between electrodes and for emitting electrons on application of a voltage between the electrodes, and an image-forming member which forms an image on irradiation of an electron beam; and designing a diameter S 1 of the electron beam at the image-forming member face in direction of application of the voltage between the electrodes to satisfy Equation (I): S.sub.1 =K.sub.1 ·2d(V.sub.f /V.sub.a).sup.1/2 (I), where K 1 is a constant and 0.8≦K 1 ≦1.0, d is a distance between the substrate and the image-forming member, V f is a voltage applied between the electrodes, and V a is a voltage applied to the image-forming member.
Claim 30
Independent Claim
130 words
A method for forming an image-forming apparatus comprising the steps of: providing a substrate with an electron-emitting device provided on the substrate and including an electron-emitting region between electrodes and for emitting electrons on application of a voltage between the electrodes, and an image-forming member which forms an image on irradiation of an electron beam; and designing a diameter S 1 of the electron beam at the image-forming member face in direction of application of the voltage between the electrodes to satisfy Equation (I): S.sub.1 =K.sub.1 ·2d(V.sub.f /V.sub.a).sup.1/2 (I), where K 1 is a constant and 0.8≦K 1 ≦1.0, d is a distance between the substrate and the image-forming member, V f is a voltage applied between the electrodes, and V a is a voltage applied to the image-forming member.
Claim 31
Independent Claim
145 words
A method for forming an image-forming apparatus comprising the steps of: providing a substrate with an electron-emitting device provided on the substrate and an electron-emitting region between electrodes and emitting electrons on application of a voltage between the electrodes, and an image-forming member which forms an image on irradiation of an electron beam; and designing a diameter S 2 of the electron beam at the image-forming member face perpendicular to the direction of application of the voltage between the electrodes to satisfy Equation (III): S.sub.2 =L+2K.sub.4 ·2d(V.sub.f /V.sub.a).sup.1/2 (III), where K 4 is a constant and 0.8≦K 4 ≦0.9, d is a distance between the substrate and the image-forming member, L is the length of the electron-emitting region perpendicular to the direction of voltage application, V f is a voltage applied between the electrodes, and V a is a voltage applied to the image-forming member.
Claim 32
Independent Claim
145 words
A method for forming an image-forming apparatus comprising the steps of: providing a substrate with an electron-emitting device provided on the substrate and an electron-emitting region between electrodes and emitting electrons on application of a voltage between the electrodes, and an image-forming member which forms an image on irradiation of an electron beam; and designing a diameter S 2 of the electron beam at the image-forming member face perpendicular to the direction of application of the voltage between the electrodes to satisfy Equation (III): S.sub.2 =L+2K.sub.4 ·2d(V.sub.f /V.sub.a).sup.1/2 (III), where K 4 is a constant and 0.8≦K 4 ≦0.9, d is a distance between the substrate and the image-forming member, L is the length of the electron-emitting region perpendicular to the direction of voltage application, V f is a voltage applied between the electrodes, and V a is a voltage applied to the image-forming member.
Claim 33
Dependent Claim
92 words
The method for forming an image forming apparatus according to claim 26, further comprises the step of designing a diameter S 1 of the electron beam at the image-forming member face in a direction of application of the voltage between the electrodes to satisfy Equation (I): S.sub.1 =K.sub.1 ·2d(V.sub.f /V.sub.a).sup.1/2 (I), where K 1 is a constant and 0.8≦K 1 ≦1.0, d is a distance between the substrate and the image-forming member, V f is a voltage applied between the electrodes, and V a is a voltage applied to the image-forming member.
Claim 34
Dependent Claim
21 words
An image-forming apparatus of any of claims 1 to 4, wherein the image-forming apparatus is used as a television picture tube.
Claim 35
Dependent Claim
21 words
An image-forming apparatus of any of claims 8 to 13, wherein the image-forming apparatus is used as a television picture tube.
Claim 36
Dependent Claim
21 words
An image-forming apparatus of any of claims 17 to 20, wherein the image-forming apparatus is used as a television picture tube.
Claim 37
Dependent Claim
21 words
An image-forming apparatus of any of claims 21 to 24, wherein the image-forming apparatus is used as a television picture tube.
Claim 38
Dependent Claim
20 words
An image-forming apparatus of any of claims 1 to 4, wherein the image-forming apparatus is used as a computer terminal.
Claim 39
Dependent Claim
20 words
An image-forming apparatus of any of claims 8 to 13, wherein the image-forming apparatus is used as a computer terminal.
Claim 40
Dependent Claim
20 words
An image-forming apparatus of any of claims 17 to 20, wherein the image-forming apparatus is used as a computer terminal.
Claim 41
Dependent Claim
20 words
An image-forming apparatus of any of claims 21 to 24, wherein the image-forming apparatus is used as a computer terminal.
References Cited (Backward Citations)
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