| 摘要 |
The present invention relates to an interactive display device based on trigonometric placement using optical sensors comprising: a screen unit in which unit recognition elements made up of optical sensors are arranged according to a predetermined arrangement rule - each of the optical sensors includes a thin film transistor and a light receiving diode connected to a signal output part of the thin film transistor -; and a driving/recognition unit which recognizes the point at which light is input using a change in the output voltage characteristics of the thin film transistor, caused by a change in the value of electric resistance of the light receiving diode, when the light is input to the screen unit from an external source. When the light input to the screen unit causes a change in the output voltage characteristics of three or more unit recognition elements, the driving/recognition unit detects the three unit recognition elements which output the largest change in the voltage characteristics, and recognizes the point at which the light is input, using the arrangement rule of the unit recognition elements and a triangulation method. |
