| 摘要 |
The present invention relates to an information input panel using the light emitted diode (LED) matrix. The panel includes the LED matrix and a control circuit. The LED matrix includes N×M LEDs. The control circuit includes N first terminals and M second terminals, wherein the ith first terminal thereof is coupled to first terminals of the LEDs in the ith row and the jth second terminal thereof is coupled to second terminals of the LEDs in the jth column. In the kth detecting period, the control circuit detects the reverse photoelectric currents of each LED from the second terminals through the kth first terminal to determine whether LED in the kth row is lighted up or not, wherein M, N, i, j, k are nature numbers and 0<i<=M; 0<j<=N; 0<k<=M.
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