| abstract |
The present application describes embodiments of a neutral density color wheel filter. According to one embodiment, a neutral density color wheel ( 100 ) includes an opaque coating ( 135 ) over one or more color segments ( 120, 130, 140, 150, 160, 170 ) with randomly placed transmissive regions ( 131 ). The transmissive regions ( 131 ) can be configured to substantially transmit incident light and the opaque coating ( 135 ) can be configured to substantially block or absorb the incident light. Alternatively, the transmissive regions ( 131 ) can be configured to substantially transmit the incident light. The color segments with opaque coating ( 135 ) and transmissive regions ( 131 ) substantially eliminate light recycling due to the reflection from the color wheel. The light transmission from the color wheel ( 100 ) is independent of the optics of a display system. |