| 摘要 |
The present invention provides a display system comprising a light source (20) producing a beam of unpolarized light. A dynamic filter (28) is provided for filtering said beam of light, wherein a first region of said filter (28) transmits a first portion of the beam of light which has a first polarization direction, said light with the first polarization direction travelling along a first path, and reflects a second portion of the beam of light which has a second polarization direction, said second portion of the beam of light travelling along a second path. The display system also provides a spatial light modulator (36) (e.g. an LCD or LCOS panel) on said first path for receiving light travelling along said first path and selectively modulating said light travelling along said first path to form an image light beam. Means for obtaining a halve-wavelength retardation (60) of the second portion of the beam of light are also provided. The dynamic filter (28) makes polarized illumination move over the spatial light modulator (36). A corresponding method for providing a scrolling illumination is also provided.
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