| 摘要 |
An improved remote control for interactive televisions is disclosed. The conventional remote control is improved by adding a light-scope as a remote-pointing device for defining an aiming point on the television screen. The light-scope consists of a photo detector and a lens system that defines a very narrow filed of view. An LED, driven by an electric signal converted from the light signal entering the light-scope, is used to create a communicating light signal. The communicating light signal, which is to some extent a replica of the light emitted from the aiming point, is sent back to the television for determine the aiming point.
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