H - Electricity – 01 – J
Patent
H - Electricity
01
J
313/167, 313/187
H01J 1/30 (2006.01) H01J 1/308 (2006.01) H01J 3/02 (2006.01) H01J 29/48 (2006.01)
Patent
CA 2015396
PHN 12.909 20-07-1989 ABSTRACT. Device for generating electrons, and display device. A planar electron-optical lens is obtained on a semiconductor cathode surface by providing an extra electrode (16) around the gate electrode (14). Dependent on the applied voltage, this configuration operates, for example, as a positive lens which supplies parallel beams without dispersion, suitable for thin, flat display devices. A large positioning tolerance is obtained due to the inherent magnification of the beam diameter in the semiconductor device, while a grid can be dispensed with.
Hoeberechts Arthur Marie Eugene
Lambert Nicolaas
Van Gorkom Gerardus Gegorius Petrus
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Philips Electronics N.v.
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