Optical: systems and elements – Glare or unwanted light reduction
Patent
1991-09-20
1993-06-08
Ben, Loha
Optical: systems and elements
Glare or unwanted light reduction
359609, 358252, G02B 2700
Patent
active
052184749
ABSTRACT:
An article for shielding the display screen of a video display terminal (VDT) from unwanted light and unauthorized viewing comprises a visor attachable around the periphery of a CRT face plate or around the face plate of other types of video display devices. The VDT visor includes thin, flat sheets of a stiff material such as chipboard laminated on upper and lower flat sides thereof by flexible vinyl cover sheets to form panel members. In the preferred embodiment, three separate, generally rectangular chipboard sheets are laminated between a single upper vinyl cover sheet and a single lower vinyl cover sheet, the outer peripheral edges of the cover sheets being bonded together to encapsulate the chipboard sheets in an adjacent relationship to one another. The vinyl material overlying spaces between adjacent chipboard sheets forms self-hinges permitting the panel members to be unfolded from a flat storage position into an inverted U-shaped channel structure comformable around the sides and top of a VDT, and attachable thereto by means of hook and loop fasteners attached to the lower vinyl cover sheet and to the VDT enclosure.
REFERENCES:
patent: 4444465 (1984-04-01), Giulie et al.
patent: 4569572 (1986-02-01), Kopich
patent: 4784468 (1988-11-01), Tierney
patent: 5069529 (1991-12-01), Takahashi
patent: 5115345 (1992-05-01), Hobson et al.
patent: 5121253 (1992-06-01), Waintroob
Ben Loha
Chapin William L.
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