Electric lamp and discharge devices – Cathode ray tube – Plural beam generating or control
Reexamination Certificate
2005-03-08
2005-03-08
Patel, Vip (Department: 2879)
Electric lamp and discharge devices
Cathode ray tube
Plural beam generating or control
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.
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Martine & Penilla LLP
Patel Vip
Trepton Research Group, Inc.
Zimmerman Glenn
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