| 摘要 |
A video monitor includes circuitry for sensing a viewer's distance from the display screen. The circuitry compares this distance with predetermined optimum viewing distance and indicates to the viewer whether they should move closer, farther away, or that they are within the optimum viewing distance. The indicator may be a single light emitting diode (LED) which is on or a particular color when the viewer is at the optimal viewing distance and is off or a different color when the viewer is not at the optimal viewing distance. The indicator may also consist of a pattern of two or more LEDs, a graduated light bar having one or more colors to indicate different viewer positions, or a text message or visual indicator incorporated in the display itself. The viewer has the option to disable the distance indicator. |
