US4107569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color selection means comprising lens electrodes spaced by grains of insulating material
Assignee: US Philips Corp
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Filing: 1977-01-13
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Granted: 1978-08-15
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Expires: 1997-01-13
Abstract
Abstract In an electrode assembly of at least two electrodes connected together in an insulating manner, said electrodes are kept at a defined distance by means of grains of an electrically insulating material. Said grains are sunk on two sides in layers of an adhesive material present on the facing surfaces of the electrodes and the sum of the thicknesses of which is smaller than the distance between the relevant electrodes.
Inventors
- 👤 Hubertus Joseph Ronde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:07
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/20; H01J31/201; H01J31/203; H01J29/00; H01J29/46; H01J29/80; H01J29/81
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
171 words
A colour display tube comprising in an evacuated envelope means to generate a number of electron beams, a display screen comprising a large number of regions luminescing in different colours, and colour selection means having a large number of apertures which associate each electron beam with luminescent regions of one colour, which colour selection means comprise a first and a second system of lens electrodes, a lens electrode belonging to the first system being kept at a defined distance from a lens electrode belonging to the second system, characterized in that a lens electrode belonging to the first system is kept at a defined distance from a lens electrode belonging to the second system by means of grains of an electrically insulating material present between the facing surfaces of the electrodes, which grains are sunk on two sides in layers of an adhesive material present on the two said surfaces of the electrodes, the sum of the thicknesses of the said layers being smaller than the distance between the relevant electrodes.
Claim 2
Dependent Claim
171 words
A colour display tube comprising in an evacuated envelope means to generate a number of electron beams, a display screen comprising a large number of regions luminescing in different colours, and colour selection means having a large number of apertures which associate each electron beam with luminescent regions of one colour, which colour selection means comprise a first and a second system of lens electrodes, a lens electrode belonging to the first system being kept at a defined distance from a lens electrode belonging to the second system, characterized in that a lens electrode belonging to the first system is kept at a defined distance from a lens electrode belonging to the second system by means of grains of an electrically insulating material present between the facing surfaces of the electrodes, which grains are sunk on two sides in layers of an adhesive material present on the two said surfaces of the electrodes, the sum of the thicknesses of the said layers being smaller than the distance between the relevant electrodes.
Claim 3
Dependent Claim
137 words
A colour display tube as claimed in claim 1, characterized in that the first system of lens electrodes consists of a metal plate comprising apertures arranged according to rows and the second system of lens electrodes consists of a grid of conductive strips connected together electrically, which plate, at least between the rows of apertures, and which strips, on the side facing the plate, are provided with a layer of adhesive material, which strips are positioned between the rows of apertures of the plate and are kept at a defined distance from the plate by grains of an electrically insulating material, said grains being partly sunk on one side in the layer of adhesive material present on the plate and being partly sunk on the other side in the layer of adhesive material present on the strips.
Claim 4
Dependent Claim
102 words
A colour display tube as claimed in claim 1, characterized in that the two systems of lens electrodes consist of a grid of conductive strips connected together electrically, which grids cross each other and are kept at a defined distance from each other at the crossings by means of grains of an electrically insulating material present between the facing surfaces of the electrodes, which grains are sunk on two sides in layers of an adhesive material present on the two said surfaces of the electrodes, the sum of the thicknesses of said layers being smaller than the distance between the relevant 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) | 1981-08-14 | 1982-02-13 | 1982-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-14 | 1986-02-13 | 1986-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-14 | 1990-02-13 | 1990-08-15 | $7700.00 | Window Closed / Lapsed |