H - Electricity – 01 – J
Patent
H - Electricity
01
J
H01J 29/51 (2006.01) H01J 29/48 (2006.01) H01J 29/52 (2006.01) H01J 29/70 (2006.01) H01J 29/72 (2006.01)
Patent
CA 2143456
There is disclosed a cathode-ray tube which employs an electron gun assembly of the laminar flow (LF) type (20, 21, 22). The beam ema- nating from the LF electron gun assembly is directed through a three- electrode einzel lens assembly (30, 31, 32) where the center electrode of the einzel lens assembly is subjected to a modulation voltage. Posi- tioned after the einzel lens assembly are magnetic deflection circuits which include a horizontal (41) and vertical (42) coil enabling the beam to deflect in the horizontal and vertical directions and which circuits are positioned internally within the CRT. A convergence assembly is also built within the neck of the CRT. Thus, the CRT provides the ad- vantages of the laminar flow gun while enabling modulation of the electron beam to provide an extremely small spot size to enable the CRT to operate with small spot size and to provide more efficient def- lection at higher modulation rates.
Chang Kern K.n.
Swabey Ogilvy Renault
LandOfFree
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