Display apparatus having collimated illumination

Details Display apparatus having collimated illumination Display apparatus having collimated illumination

2007-11-13

2007-11-13

Ton, Toan (Department: 2871)

Liquid crystal cells, elements and systems

Particular structure

Particular illumination

C362S561000, C349S064000

Reexamination Certificate

active

11102131

ABSTRACT:
A display apparatus (30) has an LC device (14) exhibiting its maximum contrast with incident light at an oblique angle φ from normal, wherein oblique angle φ is greater than about +/−10 degrees from normal. A backlight unit (32) provides substantially collimated illumination with a central ray at an incident angle θ2with respect to the LC device (14), wherein incident angle θ2within about +/−5 degrees of oblique angle φ. The full-width half-maximum intensity of the illumination is within about +/−10 degrees of the central ray at incident angle θ2.

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