The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 15, 2013
Filed:
Jun. 19, 2009
Tung-tsai Liao, Hsin Chu, TW;
LI Sheng Lo, Hsin Chu, TW;
Tung-Tsai Liao, Hsin Chu, TW;
Li Sheng Lo, Hsin Chu, TW;
Generalplus Technology Inc., Hsinchu, TW;
Abstract
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 ifirst terminal thereof is coupled to first terminals of the LEDs in the irow and the jsecond terminal thereof is coupled to second terminals of the LEDs in the jcolumn. In the kdetecting period, the control circuit detects the reverse photoelectric currents of each LED from the second terminals through the kfirst terminal to determine whether LED in the krow is lighted up or not, wherein 'M', 'N', “i”, “j”, “k” are nature numbers and 0<i<=M; 0<j<=N; 0<k<=M.