US4025815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pick-up tube having photoconductor on zinc oxide layer
Assignee: Sony Corp
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Filing: 1975-06-13
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Granted: 1977-05-24
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Expires: 1995-06-13
Abstract
Abstract In a television pickup tube, a target comprises a photo-conductive material such as antimony trisulfide, amorphous selenium or the like arranged on a transparent zinc oxide layer which is formed adjacent to a transparent electrode on a transparent faceplate or substrate. The transparent electrode may be etched so as to form a pair of electrodes each connected to a signal deriving terminal in the case where the target structure is for a color television pickup tube.
Inventors
- 👤 Hiromichi Kurokawa
- 👤 Haruhiko Okada
- 👤 Masaru Yamazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:40
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/39; H01J29/45
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
96 words
A target structure for an image pickup tube comprising a transparent substrate, transparent conductive layers on a surface of said substrate defining first and second comb-shaped electrodes having interfitting electrode elements and being connected to respective output terminals for deriving image information, a transparent zinc oxide layer formed on said conductive layers and having a resistivity between that of a conductor and an insulator, and a photo-conductive layer formed on said zinc oxide layer, said photo-conductive layer being of a P-type material which is either antimony trisulfide or which includes amorphous-selenium as a major proportion thereof.
Claim 2
Dependent Claim
96 words
A target structure for an image pickup tube comprising a transparent substrate, transparent conductive layers on a surface of said substrate defining first and second comb-shaped electrodes having interfitting electrode elements and being connected to respective output terminals for deriving image information, a transparent zinc oxide layer formed on said conductive layers and having a resistivity between that of a conductor and an insulator, and a photo-conductive layer formed on said zinc oxide layer, said photo-conductive layer being of a P-type material which is either antimony trisulfide or which includes amorphous-selenium as a major proportion thereof.
Claim 3
Dependent Claim
27 words
A target structure according to claim 1; in which a major proportion of said P-type material is amorphous-selenium and said P-type material further includes sulphur and arsenic.
Claim 4
Dependent Claim
29 words
A target structure according to claim 2; in which the amount of said sulphur and arsenic, in the form of arsenic trisulfide, is between 5 and 25 weight %.
Claim 5
Dependent Claim
15 words
A target structure according to claim 3; in which said P-type material further includes tellurium.
Claim 6
Dependent Claim
17 words
A target structure according to claim 1; in which said photo-conductive layer is formed of antimony trisulfide.
Claim 7
Dependent Claim
50 words
A target structure according to claim 1; further comprising a color filter at the surface of said substrate remote from said conductive layer, said color filter including stripe-shaped, parallel filter regions transmitting respective different wavelength bands of light and being arranged in a repeating cyclic order of a predetermined pitch.
Claim 8
Dependent Claim
46 words
A target structure according to claim 6; in which said interfitting electrode elements of said one electrode and said other electrode extend parallel to said stripe-shaped filter regions of said color filter and have a pitch equal to said predetermined pitch of said repeating cyclic order.
Claim 9
Dependent Claim
28 words
A target structure according to claim 1; in which said zinc oxide layer has a surface resistivity in the range between 10 6 Ω/square and 10 15 Ω/square.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |