Protective screen for a visual display device

Details Protective screen for a visual display device Protective screen for a visual display device

1989-03-03

1991-07-09

Yusko, Donald J.

Electric lamp and discharge devices

Cathode ray tube

Envelope

313479, 313112, 358247, 358253, H04N 572

Patent

active

050308823

ABSTRACT:
A protective screen for a visual display unit (VDU) comprises a filter layer which is operative to protect the operator from electrostatic and electromagnetic fields and from residual radiation of a cathode ray tube (CRT) of the VDU. The VDU comprises a body structure for the CRT and the screen comprises a support frame for the filter layer, an intermediate support between the frame and the body structure of the VDU and a pair of fixing plates which are adjustable both front to back and angularly, for fixing the intermediate support to the upper portion of the body structure independently of the specific form of the body structure. The frame of the screen is also pivoted to the intermediate support to permit the filter layer to be disposed in front of the display surface of the CRT or be swung up to expose the CRT screen.

REFERENCES:
patent: 4031553 (1977-06-01), Sumiyoshi et al.
patent: 4652085 (1987-03-01), Selling et al.
patent: 4712870 (1987-12-01), Robinson et al.

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