Electric lamp and discharge devices – Cathode ray tube – Envelope
Patent
1994-06-20
1999-04-13
O'Shea, Sandra
Electric lamp and discharge devices
Cathode ray tube
Envelope
H01J 2901
Patent
active
058941924
ABSTRACT:
A conforming filter for a video display unit (VDU). The VDU includes a cathode ray tube (CRT) with a curved faceplate and an aperture defining bezel. The filter includes a plastic substrate having a thickness between about 0.8 and 1.2 mm. The thickness is such that the filter may be made to substantially conform to the curvature of a cathode ray tube faceplate. The filter may be assembled in a VDU by removing the bezel, locating the filter adjacent the CRT, and applying pressure around a perimeter region of the filter to cause it to substantially conform to the curvature of the faceplate. The filter may be retained in a conforming position adjacent the faceplate by the bezel. The filter may also be attached to a bezel having a curved surface. The filter conforms to the curvature of the surface when then attached.
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patent: 3582189 (1971-06-01), Moritz et al.
patent: 4468702 (1984-08-01), Jandrell
patent: 4686576 (1987-08-01), Dickie et al.
patent: 4732454 (1988-03-01), Saito et al.
patent: 4788597 (1988-11-01), Gart et al.
patent: 4910090 (1990-03-01), Kuhlman et al.
IBM Technical Disclosure Bulletin vol. 32, No. 5B, Oct., 1989, New York US, pp. 481-482.
Machine Design vol. 57, No. 6, Mar., 1985, Cleveland, Ohio, US, p. 70.
Grabis Dietrich W.
O'shea Sandra
Wright Jerry G.
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