| 摘要 |
A driving apparatus for reporting states of a light-emitting diode (LED) channels in a binary mode comprises a plurality of channel points (NCHm), at least one controller 112, a plurality of detectors 114, and a signal converter (fig 2, 130). The controller controls operation of the connected LED channels and the signal converter receives a detecting signal Sm generated by each detector 114 and corresponding to the state of the LED channel, and computes the received detecting signal to generate a report signal with N bits in a binary mode, wherein N is an integer greater than 1, and the number of the channel points is less than 2<N>. The number of channels is preferably greater than or equal to 2<N-1>. The detector 114 may comprise voltage comparators 115,116 comparing the channel voltage with voltage references Vrefo and Vrefs corresponding to error states such as an open circuit and a short circuit, and logic element such as gate 117 to aggregate the state into detecting signal Sm. Error states may also comprise over temperature or electric leakage and the controller 112 may comprise a switch SW1/SW2 and regulating unit 113 to control turn-on of the switch. The apparatus may drive the light emitting diodes of a LED area display, such as one used for image display. |
