US3772552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image pickup tube
Assignee: Sony Corp
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Filing: 1972-05-26
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Granted: 1973-11-13
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Expires: 1992-05-26
Abstract
Abstract An image pickup tube, particularly for a color television camera, has an envelope closed, at one end, by a transparent faceplate which has a color filter on its inner surface made up of groups of stripe-shaped parallel filter regions passing respectively different wavelengths of light. A transparent glass plate is secured against the color filter and, at its surface remote from the filter, carries a pair of interleaved, combshaped electrodes having their respective elongated transparent element arranged alternately with a pitch equal to the pitch of the repeating cyclic order of the groups of color filter regions and extending parallel to the latter. A photoconductive layer covers at least the transparent elements of the comb-shaped electrodes, and output electrodes, preferably in the form of posts extending through the mentioned glass plate and faceplate, are respectively connected to the comb-shaped electrodes.
Inventors
- 👤 Y Kubota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:58
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/26; H01J31/46; H04; H04N; H04N9/00; H04N9/01
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
187 words
In an image pickup tube having an envelope closed, at one end, by a transparent faceplate, the combination of a color filter on the inner surface of said faceplate including triads of stripe-shaped, parallel filter regions transmitting respective different wavelength bands of light and being arranged in a repeating cyclic order of a predetermined pitch, a transparent glass plate secured against the inner side of said color filter, first and second comb-shaped electrodes on said glass plate, said first and second comb-shaped electrodes being insulated from each other and including first and second transparent, elongated electrode elements, respectively, which extend parallel to said stripe-shaped filter regions and are interleaved to present an alternating cyclic order of said first and second electrode elements which has a pitch substantially equal to said pitch of the repeating cyclic order of the filter regions so that, for each of said triads of filter regions, there is a pair of said first and second electrode elements, a photoconductive layer at least on said transparent elongated electrode elements, and first and second output electrodes respectively connected with said first and second comb-shaped electrodes.
Claim 2
Dependent Claim
187 words
In an image pickup tube having an envelope closed, at one end, by a transparent faceplate, the combination of a color filter on the inner surface of said faceplate including triads of stripe-shaped, parallel filter regions transmitting respective different wavelength bands of light and being arranged in a repeating cyclic order of a predetermined pitch, a transparent glass plate secured against the inner side of said color filter, first and second comb-shaped electrodes on said glass plate, said first and second comb-shaped electrodes being insulated from each other and including first and second transparent, elongated electrode elements, respectively, which extend parallel to said stripe-shaped filter regions and are interleaved to present an alternating cyclic order of said first and second electrode elements which has a pitch substantially equal to said pitch of the repeating cyclic order of the filter regions so that, for each of said triads of filter regions, there is a pair of said first and second electrode elements, a photoconductive layer at least on said transparent elongated electrode elements, and first and second output electrodes respectively connected with said first and second comb-shaped electrodes.
Claim 3
Dependent Claim
43 words
An image pickup tube according to claim 1, in which said first and second output electrodes are constituted by respective conductive posts extending from said first and second comb-shaped electrodes through said glass plate and said faceplate to the exterior of the latter.
Claim 4
Dependent Claim
27 words
An image pickup tube according to claim 1, in which said glass plate has an additional electrode thereon in surrounding relation to said pair of comb-shaped electrodes.
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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |