US4645966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display tube with fluid cooled window
Assignee: US Philips Corp
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Filing: 1986-06-12
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Granted: 1987-02-24
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Expires: 2006-06-12
Abstract
Abstract A display window (11) of a display tube is manufactured from a plate (21) having grooves (22), which plate is fused to a plate (20), so that ducts (25) are present in the display window (11). The phosphor screen (14) is provided on the inside of plate (20). The ducts (25) communicate at one end with a common supply duct (26) having an inlet aperture (27) and communicate at the other end with a common exhaust duct (28) having an outlet aperture (29). A coolant is forced through the ducts (25) for cooling the phosphor screen (14).
Inventors
- 👤 Johannes van Esdonk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:59
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/24; H01J29/006; H01J29/86; H01J29/861
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
157 words
A display tube comprising a glass envelope having a substantially rectangular display window supporting a luminescent screen and including a cooling arrangement for transferring heat away from the screen, said cooling arrangement comprising: (a) first and second substantially rectangular transparent plates having facing sides with substantially flat surfaces, the facing side of the first plate including a plurality of longitudinally oriented grooves extending into said flat surface, the facing sides of said plates being in substantial contact with each other and being sealed together to form the display window, whereby each groove of the first plate forms a separate conduit with the facing surface of the second plate for carrying a coolant; (b) coolant supply means attached to one end of the display window for supplying the coolant to respective ends of the conduits; and (c) coolant receiving means attached to another end of the display window for receiving the coolant from respective ends of the conduits.
Claim 2
Dependent Claim
157 words
A display tube comprising a glass envelope having a substantially rectangular display window supporting a luminescent screen and including a cooling arrangement for transferring heat away from the screen, said cooling arrangement comprising: (a) first and second substantially rectangular transparent plates having facing sides with substantially flat surfaces, the facing side of the first plate including a plurality of longitudinally oriented grooves extending into said flat surface, the facing sides of said plates being in substantial contact with each other and being sealed together to form the display window, whereby each groove of the first plate forms a separate conduit with the facing surface of the second plate for carrying a coolant; (b) coolant supply means attached to one end of the display window for supplying the coolant to respective ends of the conduits; and (c) coolant receiving means attached to another end of the display window for receiving the coolant from respective ends of the conduits.
Claim 3
Dependent Claim
25 words
A display tube as in claim 1, characterized in that the grooves are substantially trapezoidal in a cross-section at right angles to the longitudinal direction.
Claim 4
Dependent Claim
25 words
A display tube as in claim 1, characterized in that the grooves are substantially sinusoidal in a cross-section at right angles to the longitudinal direction.
Claim 5
Dependent Claim
33 words
A display tube as in claim 1, characterized in that the conduits are filled with a coolant having a refractive index which is substantially equal to the refractive index of the first plate.
Claim 6
Dependent Claim
34 words
A display tube as in claim 1, characterized in that one of said plates supports the luminescent screen and consists essentially of X-ray-transmissive glass, and that the other plate consists essentially of X-ray-absorbing glass.
Claim 7
Dependent Claim
25 words
A display tube as in claim 1, characterized in that one of said plates supports the luminescent screen and the other plate forms a lens.
Claim 8
Dependent Claim
24 words
A display tube as in claim 1, characterized in that one of said plates supports the luminescent screen and consists essentially of gray-tinted glass.
Claim 9
Dependent Claim
23 words
A display tube as in claim 1, characterized in that the luminescent screen consists essentially of phosphors luminescing in at least one color.
Claim 10
Dependent Claim
164 words
A projection television device including at least one display tube comprising a glass envelope having a substantially rectangular display window supporting a luminescent screen and including a cooling arrangement for transferring heat away from the screen, said cooling arrangement comprising: (a) first and second substantially rectangular transparent plates having facing sides with substantially flat surfaces, the facing side of the first plate including a plurality of longitudinally oriented grooves extending into said flat surface, the facing sides of said plates being in substantial contact with each other and being sealed together to form the display window, whereby each groove of the first plate forms a separate conduit with the facing surface of the second plate for carrying a coolant; (b) coolant supply means attached to one end of the display window for supplying the coolant to respective ends of the conduit; and (c) coolant receiving means attached to another end of the display window for receiving the coolant from respective ends of the conduits.
Claim 11
Dependent Claim
164 words
A projection television device including at least one display tube comprising a glass envelope having a substantially rectangular display window supporting a luminescent screen and including a cooling arrangement for transferring heat away from the screen, said cooling arrangement comprising: (a) first and second substantially rectangular transparent plates having facing sides with substantially flat surfaces, the facing side of the first plate including a plurality of longitudinally oriented grooves extending into said flat surface, the facing sides of said plates being in substantial contact with each other and being sealed together to form the display window, whereby each groove of the first plate forms a separate conduit with the facing surface of the second plate for carrying a coolant; (b) coolant supply means attached to one end of the display window for supplying the coolant to respective ends of the conduit; and (c) coolant receiving means attached to another end of the display window for receiving the coolant from respective ends of the conduits.
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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) | 1990-02-23 | 1990-08-25 | 1991-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-23 | 1994-08-25 | 1995-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-23 | 1998-08-25 | 1999-02-24 | $7700.00 | Window Closed / Lapsed |