Illumination control unit for display system with spatial light

Details Illumination control unit for display system with spatial light Illumination control unit for display system with spatial light

1994-03-31

1995-11-14

Kostak, Victor R.

Television

Video display

Color sequential

348771, 348746, H04N 930

Patent

active

054671469

ABSTRACT:
An illumination control unit (17) for a projection display system (10) that uses a digital mirror device (DMD) (15) to generate images. The illumination control unit (17) has a first set of lenses (23) for receiving light from a source and focussing the light to a color filter (24). A second set of lenses (25) receives the colored light and directs it to a prism (28). The prism (28) bends the light toward the reflective mirrors (30) of the DMD (15), and a collimating lens (28a) provides a beam that is approximately the size of the mirror array of the DMD (15). An optical shutter (26) is interposed between the second set of lenses (25) and the prism (28a), and permits the system (10) to achieve a "black state" between image displays or to achieve modulated brightness levels of images being displayed.

REFERENCES:
patent: 3412386 (1989-10-01), Gorog et al.
patent: 4495492 (1985-01-01), Anderson et al.
patent: 5172221 (1992-12-01), Ko

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