Beam guide for display device with beam injection means

Details Beam guide for display device with beam injection means Beam guide for display device with beam injection means

1977-09-22

1978-12-05

Segal, Robert

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

313105R, 313400, H01J 2908

Patent

active

041287843

ABSTRACT:
An evacuated envelope has spaced, substantially parallel flat front and back walls. Along the front wall is a phosphor screen and along the back wall are electron beam guides for guiding beams of electrons along paths substantially parallel to the front wall. The beam guide includes a pair of spaced, parallel plates between which the beams pass and a plurality of aligned openings in the plates with the openings being arranged in rows extending along the paths of the beams. A gun structure which includes at least one cathode is provided at one end of the beam guide plates. The gun structure is adapted to generate the electrons and direct the electrons as beams between the beam guide plates. The beam guide plates have tabs extending from the one end toward the cathode with the tabs being positioned at the ends of the rows of the openings in the plates. The tabs are adapted to generate electrostatic fields which guide the beams from the cathode between the plates along the rows of the openings.

REFERENCES:
patent: 4031427 (1977-06-01), Stanley

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