1989-09-01
1990-04-17
Miller, Stanley D.
350337, 350347E, G02F 113
Patent
active
049174657
ABSTRACT:
A preferred display system is formed by stacking three STN birefringent LCD panels that are tuned to different subtractive primary colors (i.e. yellow, cyan and magenta). Interposed between the panels, and sandwiched about the stack, are polarizers. At least some of the polarizers may be colored to enhance the birefringence color characteristics and to improve brightness. In some embodiments, the assembly is illuminated by a collimated light source and the resulting image is focused onto a projection screen for viewing. In other embodiments, optics are provided to permit direct wide angle viewing of the display without parallax effects.
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Conner Arlie R.
Gulick Paul E.
In Focus Systems, Inc.
Mai Huy K.
Miller Stanley D.
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