Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Patent
1978-04-25
1979-01-30
Blum, Theodore M.
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
313422, H01J 2970, H01J 2972
Patent
active
041374860
ABSTRACT:
This disclosure depicts an image display panel partitioned into two distinct sections comprising a high voltage front section and a low voltage rear section. An electron source means located in the low-voltage rear section is disposed along a row-wise edge of the panel for generating a supply of electrons. A plurality of low-energy electron beams drawn from the electron source means are formed, shaped and modulated. Each beam is directed into a beam guide-isolator responsive to relatively low applied beam control voltages. The beams are further directed by the plurality of beam guide-isolators perpendicular to said edge and parallel to the image display panel faceplate, and are repetitively, and preferably substantially periodically, focused and refocused to constrain the electrons from leaving the beam guide-isolators. Beam diverting means responsive to the application of relatively low applied beam diverting voltages sharply divert the beams through apertures in the beam guide-isolators from selected precise positions opposite the faceplate. The electrons of each beam are accelerated to a high energy in the high voltage front section to activate cathodoluminescent phosphor targets. Means are disclosed for confining the upward travel of the beam and for diverting the beam towards a faceplate; the means comprise pairs of opposed parallel walls having deposited thereon at least two electrode patterns each electrically linked to a substantially mirror-image electrode pattern deposited on the opposed parallel wall.
REFERENCES:
patent: 4076994 (1978-02-01), Anderson
patent: 4088920 (1978-05-01), Siekanowicz et al.
Blum Theodore M.
Clarke, Jr. Ralph E.
Zenith Radio Corporation
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