| 摘要 |
A transmissive, rotatable optical element for use in a scrolling color display system, the optical element being arranged to provide, when rotated, varying color filtering of incident light. The optical element has at least one position in which incident light will pass two different color filters, in combination forming a third filter. By substituting at least one color filter with a combination of two other filters, the number of different components in the optical element can be reduced. A display system using such an optical element is also disclosed. |
