US4564784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduced degradation, high resolution image pickup tube
Assignee: Hitachi Ltd
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Filing: 1983-11-16
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Granted: 1986-01-14
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Expires: 2003-11-16
Abstract
Abstract An image pickup tube comprising a target composed of a light-transmissible plate, a transparent electrode provided on said light-transmissible plate and a photoconductor made of hydrogen-containing amorphous silicon provided on said transparent electrode; an electron beam generator; and a mesh electrode near the aforesaid target, at least the surface of said mesh electrode being made of at least one member selected fromthe group consisting of Be, B, C, Mg, Al and Si, has high resolution with greatly improved life characteristics.
Inventors
- 👤 Sachio Ishioka
- 👤 Yoshinori Imamura
- 👤 Tadaaki Hirai
- 👤 Saburo Nobutoki
- 👤 Akio Maruyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:34
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/26; H01J31/28; H01J31/34; H01J31/38; H01J29/00; H01J29/02; H01J29/08
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
72 words
An image pickup tube comprising a target composed of a light-transmissible plate, a transparent electrode provided on said light-transmissible plate, and a photoconductor made of hydrogen-containing amorphous silicon provided on said transparent electrode; an electron beam generator; and a mesh electrode near the target, at least the surface of said mesh electrode being made of at least one member selected from the group consisting of beryllium, boron, carbon, magnesium, aluminum and silicon.
Claim 2
Dependent Claim
72 words
An image pickup tube comprising a target composed of a light-transmissible plate, a transparent electrode provided on said light-transmissible plate, and a photoconductor made of hydrogen-containing amorphous silicon provided on said transparent electrode; an electron beam generator; and a mesh electrode near the target, at least the surface of said mesh electrode being made of at least one member selected from the group consisting of beryllium, boron, carbon, magnesium, aluminum and silicon.
Claim 3
Dependent Claim
28 words
An image pickup tube according to claim 1, wherein the mesh electrode is made of a copper substrate, the surface of which is coated with carbon or aluminum.
Claim 4
Dependent Claim
26 words
An image pickup tube according to claim 1, wherein the mesh electrode is made of an aluminum substrate, the surface of which is coated with carbon.
Claim 5
Dependent Claim
22 words
An image pickup tube according to claim 1, wherein a voltage of 500 V or higher is applied to the mesh electrode.
Claim 6
Dependent Claim
22 words
An image pickup tube according to claim 2, wherein a voltage of 500 V or higher is applied to the mesh electrode.
Claim 7
Dependent Claim
22 words
An image pickup tube according to claim 3, wherein a voltage of 500 V or higher is applied to the mesh electrode.
Claim 8
Dependent Claim
77 words
An image pickup tube comprising a target composed of a light-transmissible plate, a transparent electrode provided on said light-transmissible plate, and a photoconductor made of hydrogen-containing amorphous silicon provided on said transparent electrode; an electron beam generator; and a mesh electrode near the target, at least the surface of said mesh electrode facing the electron beam generator being made of at least one material selected from the group consisting of beryllium, boron, carbon, magnesium, aluminum and silicon.
Claim 9
Dependent Claim
77 words
An image pickup tube comprising a target composed of a light-transmissible plate, a transparent electrode provided on said light-transmissible plate, and a photoconductor made of hydrogen-containing amorphous silicon provided on said transparent electrode; an electron beam generator; and a mesh electrode near the target, at least the surface of said mesh electrode facing the electron beam generator being made of at least one material selected from the group consisting of beryllium, boron, carbon, magnesium, aluminum and silicon.
Claim 10
Dependent Claim
28 words
An image pickup tube according to claim 7, wherein the mesh electrode is made of a copper substrate, the surface of which is coated with carbon or aluminum.
Claim 11
Dependent Claim
26 words
An image pickup tube according to claim 7, wherein the mesh electrode is made of an aluminum substrate, the surface of which is coated with carbon.
Claim 12
Dependent Claim
22 words
An image pickup tube according to claim 7, wherein a voltage of 500 V or higher is applied to the mesh electrode.
Claim 13
Dependent Claim
22 words
An image pickup tube according to claim 8, wherein a voltage of 500 V or higher is applied to the mesh electrode.
Claim 14
Dependent Claim
22 words
An image pickup tube according to claim 9, wherein a voltage of 500 V or higher is applied to the mesh electrode.
Claim 15
Dependent Claim
62 words
An image pickup tube comprising a target having a light-transmissible plate, a transparent electrode provided on the light-transmissible plate, and a photoconductor made of hydrogen-containing amorphous silicon provided on the transparent electrode; an electron beam generator; a mesh electrode; and means provided on the mesh electrode relative to the electron beam generator for reducing degradation of signal current-voltage characteristics of the tube.
Claim 16
Dependent Claim
62 words
An image pickup tube comprising a target having a light-transmissible plate, a transparent electrode provided on the light-transmissible plate, and a photoconductor made of hydrogen-containing amorphous silicon provided on the transparent electrode; an electron beam generator; a mesh electrode; and means provided on the mesh electrode relative to the electron beam generator for reducing degradation of signal current-voltage characteristics of the tube.
Claim 17
Dependent Claim
42 words
An image pickup tube according to claim 13, wherein the degradation reducing means comprises a material provided on at least the surface of the mesh electrode, the material being selected from the group consisting of beryllium, boron, carbon, magnesium, aluminum and silicon.
Claim 18
Dependent Claim
25 words
An image pickup tube according to clami 13, wherein the material is provided on the surface of the mesh electrode facing the electron beam generator.
Claim 19
Dependent Claim
25 words
An image pickup tube according to clami 13, wherein the material is provided on the surface of the mesh electrode facing the electron beam generator.
Claim 20
Dependent Claim
28 words
An image pickup tube according to claim 14, wherein the mesh electrode is made of a copper substrate, the surface of which is coated with carbon or aluminum.
Claim 21
Dependent Claim
26 words
An image pickup tube according to claim 14, wherein the mesh electrode is made of an aluminum substrate, the surface of which is coated with carbon.
Claim 22
Dependent Claim
22 words
An image pickup tube according to claim 14, wherein a voltage of 500 V or higher is applied to the mesh electrode.
Claim 23
Dependent Claim
22 words
An image pickup tube according to claim 16, wherein a voltage of 500 V or higher is applied to the mesh electrode.
Claim 24
Dependent Claim
22 words
An image pickup tube according to claim 17, wherein a voltage of 500 V or higher is applied to the mesh electrode.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-13 | 1989-07-15 | 1990-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-13 | 1993-07-15 | 1994-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-13 | 1997-07-15 | 1998-01-14 | $7700.00 | Window Closed / Lapsed |