| 摘要 |
An apparatus for detecting a projection angle of a projection system for displaying a picture, which automatically detects a projection angle of a projection lens with respect to a screen and provides computed compensation amounts to an apparatus for pre-compensating an asymmetrical picture, is disclosed. Even when the projection lens installed in the projection system for displaying a picture is disposed at an upward or a downward projection angle, the projection angle is automatically detected and the detected projection angle is provided as the compensation amount to the apparatus for pre-compensating an asymmetrical picture. Consequently, the user does not have to engage in a cumbersome process of setting up the compensation amount through trial and error.
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