US4517494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screening structure for a cathode ray tube display
Assignee: Sharp Corp
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Filing: 1982-11-02
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Granted: 1985-05-14
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Expires: 2002-11-02
Abstract
Abstract A screening structure for a cathode ray tube display includes at least a cathode ray tube pin socket, a cathode ray tube input pin and a video amplifier section joined as one body and enveloped with a first screening member which has high conducting characteristics, and a cathode ray tube cathode section enveloped with a second screening member which has high conducting characteristics, the first and second screening members being connected as one body in order that they may be maintained at the same high frequency potential. The screening members are joined to the standard potential part of the cathode ray tube display by a cable having a low high-frequency impedance.
Inventors
- 👤 Toru Yasui
- 👤 Haruo Nakatsuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:39
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/867
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
146 words
A screening structure for preventing radiation of electromagnetic waves from a cathode ray tube display comprising: at least a cathode ray tube pin socket, a cathode ray tube input pin and a video amplifier section joined as one body and enveloped with a first screening member which has high conducting characteristics; a cathode ray tube cathode section enveloped with a second screening member which has high conducting characteristics, said first and second screening members being in electrical contact with each other; cable means connected to said amplifier section for providing a video signal thereto and enveloped by a third screening member which has high conducting characteristics, said first and third screening members being in electrical contact with each other; and means having a low high-frequency impedance for joining said first, second and third screening members to the standard potential part of the cathode ray tube display.
Claim 2
Dependent Claim
146 words
A screening structure for preventing radiation of electromagnetic waves from a cathode ray tube display comprising: at least a cathode ray tube pin socket, a cathode ray tube input pin and a video amplifier section joined as one body and enveloped with a first screening member which has high conducting characteristics; a cathode ray tube cathode section enveloped with a second screening member which has high conducting characteristics, said first and second screening members being in electrical contact with each other; cable means connected to said amplifier section for providing a video signal thereto and enveloped by a third screening member which has high conducting characteristics, said first and third screening members being in electrical contact with each other; and means having a low high-frequency impedance for joining said first, second and third screening members to the standard potential part of the cathode ray tube display.
Claim 3
Dependent Claim
48 words
A screening structure for preventing radiation of electromagnetic waves from a cathode ray tube display according to claim 1, wherein first and second screening members are constructed as one body, and said second screening member surrounds and is spaced from a glass tube of the cathode ray tube.
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) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |