Privacy screen for a display

Details Privacy screen for a display Privacy screen for a display

2007-01-30

2007-01-30

Lavarias, Arnel C. (Department: 2872)

Optical: systems and elements

Extended spacing structure for optical elements

Extension of tubular element adjustable

C359S490020, C359S352000

Reexamination Certificate

active

11030683

ABSTRACT:
A privacy screen for a vertically polarized display (e.g., a LCD) that comprises a rotating film, a polarizing film and a birefringent film is described. The privacy screen transmits substantial amounts of light emanating from the display in an orthogonal (or near-orthogonal) direction while not transmitting substantial amounts of horizontal, non-orthogonal light emanating from the display. In this manner, a privacy effect results in that the display is viewable by someone only when that someone is essentially directly in front of the display.

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