US3771002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single gun, multi-beam color cathode ray tube
Assignee: Individual
•
Filing: 1972-07-18
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Granted: 1973-11-06
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Expires: 1992-07-18
Abstract
Abstract A cathode ray tube which produces plural beams from a single electron gun having a single cathode and having a control grid and a first anode each of which have at least three beam apertures arranged for example to produce three vertically spaced beams. Focus and accelerating anodes for the plural beams are also provided. The phosphor screen area is made up of plural parallel vertically spaced substantially horizontal bands of phosphor material. In a preferred tri-color example, each band is made up of three, substantially horizontal phosphor strips of red, blue and green producing phosphor spaced in vertical succession and scanned by the three beams.
Inventors
- 👤 A Standaart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:13
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/18; H01J29/30; H01J29/32; B; B82; B82Y; B82Y10/00; H01J29/46; H01J29/48; H01J29/50; H01J29/503; H01J31/00; H01J31/08; H01J31/10; H01J31/20; H01J31/201; H01J31/50; H01J2229/00; H01J2229/48; H01J2229/50; H01J2229/507; H01J2231/00; H01J2231/12; H01J2231/121
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
255 words
A multi-beam cathode ray tube for producing visible images without a shadow mask, comprising a glass envelope including a neck portion and a faceplate portion, said faceplate portion having a phosphor screen area formed of elongated plural parallel, vertically spaced bands spanning the screen area along substantially horizontal scan axes and spaced in succession vertically along the screen area, a single electron gun within saie neck portion for producing at least three vertically spaced electron beams arranged in a substantially vertical plane, said electron gun including a single cathode comprising a sheet member facing the screen area having a channel formation projecting toward the screen area and defining a vertically elongated flat emission panel vertically spanning the cathode, a coating of electron emission material on said emission panel which is thermally activated to emit electrons for forming the electron beams, control grid and first anode elements in paced planes paralleling the plane of said emission panel and each having three holes spaced along a vertical plane providing a hole for each of the three respective electron beams for controlling and shaing the electrons emitted by the cathode into the three spaced beams, the holes in said grid and first anode elements for each respective electron beam being axially alined along a beam axis substantially perpendicular to said emission panel, electrically conductive material about said holes, means for applying selected electrical potentials to said conductive material for the individual holes, and acclerating anode means for accelerating the electrons in said beams toward said phosphor screen area.
Claim 2
Dependent Claim
255 words
A multi-beam cathode ray tube for producing visible images without a shadow mask, comprising a glass envelope including a neck portion and a faceplate portion, said faceplate portion having a phosphor screen area formed of elongated plural parallel, vertically spaced bands spanning the screen area along substantially horizontal scan axes and spaced in succession vertically along the screen area, a single electron gun within saie neck portion for producing at least three vertically spaced electron beams arranged in a substantially vertical plane, said electron gun including a single cathode comprising a sheet member facing the screen area having a channel formation projecting toward the screen area and defining a vertically elongated flat emission panel vertically spanning the cathode, a coating of electron emission material on said emission panel which is thermally activated to emit electrons for forming the electron beams, control grid and first anode elements in paced planes paralleling the plane of said emission panel and each having three holes spaced along a vertical plane providing a hole for each of the three respective electron beams for controlling and shaing the electrons emitted by the cathode into the three spaced beams, the holes in said grid and first anode elements for each respective electron beam being axially alined along a beam axis substantially perpendicular to said emission panel, electrically conductive material about said holes, means for applying selected electrical potentials to said conductive material for the individual holes, and acclerating anode means for accelerating the electrons in said beams toward said phosphor screen area.
Claim 3
Dependent Claim
20 words
A multi-beam cathode ray tube as defined in claim 1, wherein said channel formation is of substantially truncated V-shaped cross-section.
Claim 4
Dependent Claim
74 words
A cathode ray tube construction as defined in claim 1, wherein said cathode comprises a pair of joined metallic sheet members each having an outwardly projecting runcated V-shaped channel formation collectively defining a vertically extending six-sided channel of substantially honeycomb configuration in cross-section defining a forward flat face forming said emission panel and alined respectively 1with said holes in said control grid and anode elements, the channels housing filament wire along the lEngth thereof.
Claim 5
Dependent Claim
57 words
A multi-beam cathode ray tube as definned in claim 1, wherein said flat emission panel has a width in a direction perpendicular to said vertical plane of about 3 mm, the holes in said control grid have a diameter of about 3/4 mm, and the holes in said first anode have a diameter of about 1 mm.
Claim 6
Dependent Claim
57 words
A multi-beam cathode ray tube as defined in claim 2, wherein said flat emission panel has a width in a direction perpendicular to said vertical plane of about 3 mm, the holes in said control grid have a diameter of about 3/4 mm, and the holes in said first anode have a diameter of about 1 mm.
Claim 7
Dependent Claim
57 words
A multi-beam cathode ray tube as defined in claim 3, wherein said flat emission panel has a width in a direction perpendicular to said vertical plane of about 3 mm, the holes in said control grid have a diameter of about 3/4 mm, and the holes in said first anode have a diameter of about 1 mm.
Claim 8
Dependent Claim
41 words
A multi-beam cathode ray tube as defined in claim 1, including a pair of filament winding coils in said channel formation rearwardly of said emission panel having their coils intermeshed to intensify heating adjacent the central axis of the smission panel.
Claim 9
Dependent Claim
45 words
A multi-beam cathode ray tube as defined in claim 3, wherein said filament wire includes a pair of filament winding coils in said channel formation rearwardly of said emission panel having their coils intermeshed to intensify heating adjacent the central axis of the emission panel.
Claim 10
Dependent Claim
51 words
A multi-beam cathode ray tube as defined in claim 3, wherein said filament wire includes a pair of filament winding coils in said channel formation rearwardly of said emission panel having their coils intermeshed to intensity heating adjacent the central axis of the emission panel and would in relatively opposite directions.
Claim 11
Dependent Claim
95 words
A cathode ray tube construction as defined in claim 1, wherein said control grid is formed of a non-conductive substrate panel having said holes therethrough alined respectively with said emission panel and having a rearwardly facing recess in the center region of the substrate to receive the cathode channel formation in partially nested relation therein, said holes opening into said recess, and said control grid having electrically conductive material lining the holes and connected by conductor strips to edge terminals for applying selected potentials to the lining material for individual control of the electron beams.
Claim 12
Dependent Claim
98 words
A cathode ray tube construction as defined in claim 2, wherein said control grid is formed of a non-conductive substrate panel having said holes therethrugh alined respectively with said emission panel and having a rearwardly facing recess of truncated V-shaped cross-section in the center region of the substrate to receive the cathode channel formation in partiallynested relation therein, said holes opening into said recess, and said control grid having electrically conductive material lining the holes and connected by conductor strips to edge terminals for applying selected potentials to the lining material for individual control of the electron beams.
Claim 13
Dependent Claim
99 words
A cathode ray tube construction as defined in claim 3, wherein said control grid is formed of a non-conductive substrate panel having said holes therethrough alined respectively with said emission panel and having a rearwardly facing recess of truncated V-shaped cross-section in the center region of the substrate to receive the cathode channel formation in partially nested relation therein, said holes opening into said recess, and said control grid having electrically conductive material lining the holes and connected by conductor strips to edge terminals for applying selected potentials to the lining material for individual control of the electron beams.
Claim 14
Dependent Claim
64 words
A cathode ray tube construction as defined in claim 11, wherein said recess in said control grid has a flat base well confronting said emission panel of slightly smaller width than the emission panel to effect engagement Of edges of the panel with side walls of the recess when the panel is spaced slightly rearwardly of the recess base wall to maintain such spacing.
Claim 15
Dependent Claim
64 words
A cathode ray tube construction as defined in claim 12, wherein said recess in said control grid has a flat base wall confronting said emission panel of slightly smaller width than the emission panel to effect engagement of edges of the panel with said walls of the recess when the panel is spaced slightly rearwardly of the ecess base wall to maintain such spacing.
Claim 16
Dependent Claim
64 words
A multi-beam cathode ray tube as defined in claim 1, wherein said control grid and first anode elements each include a non-conductive substrate panel having metallic lined apertures therethrough forming said holes and having a metallic shield extending from the substrate periphery as a closed surround rearwardly from the control grid and forwardly from the first anode to minimize external interference and radiation effects.
Claim 17
Dependent Claim
64 words
A multi-beam cathode ray tube as defined in claim 3, wherein said control grid and first anode elements each include a non-conductive substrate panel having metallic lined apertures therethrough forming said holes and having a metallic shield extending from the substrate periphery as a closed surround rearwardly from the control grid and forwardly from the first anode to minimize external interference and radiation effects.
Claim 18
Dependent Claim
64 words
A multi-beam cathode ray tube as defined in claim 10, wherein said control grid and first anode elements each include a non-conductive substrate panel having metallic lined apertures therethrough forming said holes and having a metallic shield extending from the substrate periphery as a closed around rearwardly from the control grid and forwardly from the first anode to minimize external interference and radiation effects.
Claim 19
Dependent Claim
67 words
A multi-beam cathode ray tube as defined in claim 1, including a pair of magnets located above and below said neck portion for diverting the top and bottom beams of said three beams to converging, non-crossing paths for producing spots therefrom at the screen area spaced closer to the center of said three beams than the spacing between the beams at the region of the control grid.
Claim 20
Dependent Claim
67 words
A multi-beam cathode ray tube as defined in claim 2, including a pair of magnets located above and below said neck portion for diverting the top and bottom beams of said three beams to converging, non-crossing paths for producing spots therefrom at the screen area spaced closer to the center of said three beams than the spacing between the beams at the region of the control grid.
Claim 21
Dependent Claim
66 words
A multi-beam cathode ray tube asdefined in claim 10, including a pair of magnets located above and below said neck portion for diverting the top and bottom beams of said three beams to converging, non-crossing paths for producing stops therefrom at the screen area spaced closer to the center of said three beams than the spacing between the beams at the region of the control grid.
Claim 22
Dependent Claim
106 words
A multi-beam cathode ray tube as defined in claim 1, for use in producing tri-color images for a television receiver and the like, wherein said bands each form a set of three elongated strips of a first, second and third color-producing phosphor having their longitudinal axes extending substantially horizontally and the phosphor strips being spaced vertically with a narrow guard band between each phosphor strip, the three vertically spaced electron beams being respectively directed onto the three phosphor strips in each band in a preselected order to be scanned along their associated phosphor strips of each band for producing a color image on the screen area.
Claim 23
Dependent Claim
106 words
A multi-beam cathode ray tube as defined in claim 3, for use in producing tri-color images for a television receiver and the like, wherein said bands each form a set of three elongated strips of a first, second and third color-producing phosphor having their longitudinal axes extending substantially horizontally and the phosphor strip being spaced vertically with a narrOw guard band between each phosphor strip, the three vertically spaced electron beams being respectively directed onto the three phosphor strips in each band in a preselected order to be scanned along their associated phosphor strips of each band for producing a color image on the screen area.
Claim 24
Dependent Claim
105 words
A multi-beam cathode ray tube as defined in claim 10, for using in producingtri-color images for a television receiver and the like, wherein said bands each form a set of three elongated strips of a first, second and third color-producing phosphor having their longitudinal axes extending substantially horizontally and the phosphor strips being spaced vertically with a narrow guard band between each phosphor strip, the three vertically spaced electron beams being respectively directed onto the three phosphor strips in each band in a preselected order to be scanned along their associated phosphor strips of each band for producing a color image on the screen area.
Claim 25
Dependent Claim
106 words
A multi-beam cathode ray tube as defined in claim 15, for use in producing tri-color images for a television receiver and the like, wherein said bands each form a set of three elongated strips of a first, second and third color-producing phosphor having their longitudinal axes extending substantially horizontally and the phosphor strips being spaced vertically with a narrow guard band between each phosphor strip, the three vertically spaced electron beams being respectively directec onto the three phosphor strips in each band in a preselected order to be scanned along their associated phosphor strips of each band for producing a color image on the screen area.
Claim 26
Dependent Claim
30 words
A multi-beam cathode ray tube as defined in claim 21, wherein said phosphor strips are each about 0.010 inch in height and said guard band is about 0.001 inch high.
Claim 27
Dependent Claim
30 words
A multi-beam cathode ray tube as defined in claim 22, wherein said phosphor strips are each about 0.010 inch in height and said guard band is about 0.001 inch high.
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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |