| 摘要 |
An electronic device (200) includes a display (202) and an LC shutter (204), at least a portion of which is operatively positioned over the display (202). The LC shutter (204) provides switching between a transparent state and a diffusive state with high image integrity, and high transmission in the transparent state. In one embodiment, the electronic device (200) further includes control logic (206) operatively coupled to the LC shutter (204) to provide control signals (212) to the LC shutter (204) to effect the transparent state. The LC shutter (204) includes a first dichroic polarizer (300), such as a broadband dichroic polarizer, a specular reflective polarizer (302), such as a broadband reflective polarizer, an LC cell (304), and a diffusive reflective polarizer (306). The LC cell (304) is interposed between the first dichroic polarizer (300) and the specular reflective polarizer (302). The diffusive reflective polarizer (306) is interposed between the LC cell (304) and the specular reflective polarizer (302). Related methods are also set forth.
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