| 摘要 |
<p>A high brightness color selective light modulator (CSLM) (10) formed by a polarization modulator (100) positioned between two retarder stacks (110, 120). The modulator (100) changes the apparent orientation of one retarder stack to the other, in a first switching state of the modulator, the two retarder stacks (110, 120) cooperate in filtering the spectrum of input light, and in a second switching state the two retarder stacks (110, 120) complement each other, yielding a neutral transmission spectrum. Two or more CSLM stages (1420-1430) can be used in series for providing independent control of a primary color. One preferred embodiment eliminates internal polarizers between CSLM stages, thereby providing an additive common-path full-color display with only two neutral polarizers (1450-1460). Hybrid filters (2225) utilize the CSLMs (1420-1430), in combination with other active or passive filters. The CSLMs (1420-1430) can be arranged in a multi-pixel array (2230), and can be implemented as color filter arrays, using patterned passive retarder instead active polarization modulators.</p> |
