| 摘要 |
The viewer position indicator arrangement is formed by an upper strip of the backlight 1, a signalling portion 2b comprising one or more upper rows of pixels of the SLM 2, and an upper portion 3a of the parallax optic 3. The pixels 30 and 31 and the parallax elements 32 cooperate to provide a bright image in the lobes 10 and 11 and a dark image in the lobes 7, 14 and 15. Thus, when an observer is located at the orthoscopic positions 17, 19 and 21 in the viewing windows 16, the viewer position indicating arrangement appears dark. As the observer moves from an orthoscopic position such as 17,19,21 to a pseudoscopic position such as 22-25 light from the viewer position indicating arrangement becomes visible thus indicating to the observer that they have moved to a psuedoscopic position 22-25.
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