US4543510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid cooled cathode ray tube with reduced internal reflectance
Assignee: Sony Corp
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Filing: 1983-03-07
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Granted: 1985-09-24
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Expires: 2003-03-07
Abstract
Abstract A cathode ray tube apparatus including an envelope having a panel portion with a phosphor screen formed on the inner surface thereof, a neck portion provided with an electron gun therein and a funnel portion therebetween; and a transparent panel facing the external surface of the panel portion with a peripherally located spacer therebetween, wherein a liquid coolant is sealed in the space formed between the panel portion and the transparent panel by light absorbing material, and the spacer is treated to reduce reflection.
Inventors
- 👤 Tomosuke Chiba
- 👤 Hiroshi Kato
- 👤 Takashi Suganuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:01
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/89; H01J29/006
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
118 words
A cathode ray tube apparatus comprising: (a) an envelope having a panel portion with a phosphor screen formed on the inner surface thereof, a neck portion provided with an electron gun therein, and a funnel portion therebetween; (b) a transparent panel facing an external surface of said panel portion with a spacer therebetween confined at the peripheral edges thereof; and (c) a liquid coolant between said panel portion and said transparent panel, sealed therein at the peripheral edges with a blackened light absorbing sealing material, the compression of said panel portion and said transparent panel causing the sealing material to envelop said spacer a sufficient amount to significantly reduce light reflected back into the interior of said tube.
Claim 2
Dependent Claim
118 words
A cathode ray tube apparatus comprising: (a) an envelope having a panel portion with a phosphor screen formed on the inner surface thereof, a neck portion provided with an electron gun therein, and a funnel portion therebetween; (b) a transparent panel facing an external surface of said panel portion with a spacer therebetween confined at the peripheral edges thereof; and (c) a liquid coolant between said panel portion and said transparent panel, sealed therein at the peripheral edges with a blackened light absorbing sealing material, the compression of said panel portion and said transparent panel causing the sealing material to envelop said spacer a sufficient amount to significantly reduce light reflected back into the interior of said tube.
Claim 3
Dependent Claim
15 words
A cathode ray tube apparatus according to claim 1, wherein said sealing material is blackened.
Claim 4
Dependent Claim
29 words
A cathode ray tube apparatus according to claim 1, wherein at least a portion of the surface of said spacer which is exposed to said liquid coolant is blackened.
Claim 5
Dependent Claim
17 words
A cathode ray tube apparatus according to claim 1, wherein the surface of said spacer is roughened.
Claim 6
Dependent Claim
19 words
A cathode ray tube apparatus according to claim 1, wherein the spacer and sealing material are efficient heat conductors.
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) | 1988-09-23 | 1989-03-25 | 1989-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-23 | 1993-03-25 | 1993-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-23 | 1997-03-25 | 1997-09-24 | $7700.00 | Window Closed / Lapsed |