Color pixel element cathode ray tube

Electric lamp and discharge devices – Cathode ray tube – Plural beam generating or control

Reexamination Certificate

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Details

C313S411000, C313S446000

Reexamination Certificate

active

06864625

ABSTRACT:
Color CRTs, used in large display screens, have a plurality of three color electron beams that are strongly focused so that they crossover and become divergent in both the X and Y axes if the CTR's face. The strength of the focusing determines the size of the illuminated area on the face of the CRT. A shadow mask, aperture grill, or slotted mask and the red, green and blue phosphor dots or stripes are located at predetermined positions such that the red electron beams only hit the red phosphors, the green electron beams only hit the green phosphors, and the blue electron beams only hit the blue phosphors. No raster scanning with the electron beams are required.

REFERENCES:
patent: 4061941 (1977-12-01), Hallett et al.
patent: 4095138 (1978-06-01), Schwartz
patent: 4513221 (1985-04-01), Robbins
patent: 4766341 (1988-08-01), Nakamura
patent: 4961022 (1990-10-01), Hellings et al.
patent: 4961626 (1990-10-01), Fournier et al.
patent: 5905332 (1999-05-01), Yun et al.
patent: 20010024078 (2001-09-01), Dimitrijevic et al.

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