H - Electricity – 01 – J
Patent
H - Electricity
01
J
H01J 29/07 (2006.01) H01J 9/00 (2006.01) H01J 9/14 (2006.01)
Patent
CA 2159370
A display apparatus comprises a color CRT having an evacuated envelope with a faceplate panel sealed to one end of a funnel that is closed at the other end by a neck. The faceplate panel has a luminescent screen on an interior surface thereof. A shadow mask is located in proximity to the screen. The shadow mask comprises a metal sheet having a central portion and an exterior portion with a plurality of apertures therethrough. An electron gun is disposed within the neck for generating and directing electron beams toward the screen. A deflection yoke is disposed around the envelope at the junction of the neck and the funnel. The yoke deflects the beams to scan a raster across the screen. The display apparatus is improved over other, prior devices in that the apertures in the exterior portion of the mask, on the screen-facing side thereof, have openings that are elongated in the direction of the incident electron beams and offset relative to the corresponding openings on the electron gun- facing side of the mask. A method of making the mask employs photoetching.
Eshleman Craig Clay
Gorog Istvan
Marks Bruce George
Simpson Theodore Frederick
Wetzel Charles Michael
Craig Wilson And Company
Thomson Consumer Electronics Inc.
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