H - Electricity – 01 – J
Patent
H - Electricity
01
J
313/35.12
H01J 29/46 (2006.01) H01J 29/50 (2006.01) H01J 29/74 (2006.01) H01J 31/12 (2006.01) H01J 31/20 (2006.01)
Patent
CA 1120989
RCA 71,849 Modular Flat Display Device With Beam Convergence Abstract An evacuated envelope has substantially flat, parallel front and back walls and spaced, parallel support walls extending between and perpendicular to the front and back walls and forming a plurality of channels. Beam guides extend along each of the channels for guiding three beams along each channel and for selectively deflecting the beams at selected points along the channel toward a phosphor screen on the front wall. Between the beam guides and the phosphor screen are deflection electrodes for deflecting the beams transversely across the channel so as to scan the portion of the phosphor screen which extends across the channel. Also between the beam guides and the phosphor screen, unlike earlier displays of this type, are additional electrodes which are biased to create an electron lens for converging the three beams at a point spaced from but adjacent to the screen. The phosphor screen is preferably made up of different color emitting phosphor bodies with each beam impinging on a different color phosphor, and the beams are converged at a shadow mask which extends across the channel adjacent to but spaced from the screen. 6-5-81
312583
Morneau Roland L.
Rca Corporation
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