Patent ID: 11871511
Assignee: WUHAN TIANMA MICROELECTRONICS CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 12:
13. The detection method according to claim 12,
wherein the flexible circuit mother board further comprises a plurality of detachable resistors;
wherein in one flexible circuit daughter board and one detection terminal group corresponding to the one flexible circuit daughter board: one detachable resistor corresponds to one detection terminal, and at least one of the first electrode plate or the second electrode plate of the capacitor is electrically connected to the detection terminal through the one detachable resistor;
wherein each flexible circuit daughter board comprises p capacitors, where p is an integer and p≥2; the p capacitors in each flexible circuit daughter board are arranged in a same manner, and the p capacitors comprises a first capacitor, a second capacitor . . . , and a pth capacitor;
wherein the one detection terminal group is configured to detect at least n flexible circuit daughter boards, where n is a positive integer and n≥2; each of the n flexible circuit daughter boards comprises a qth capacitor, where q is a positive integer and q≤p; and the first electrode plate or the second electrode plate of the qth capacitor is electrically connected to a same detection terminal through the detachable resistor;
wherein said detecting the current in the loop where the detection terminal pair and the at least one capacitor is located to obtain the primary detection current value comprises: calculating a sum of currents in the capacitors in the n flexible circuit daughter boards as the primary detection current value;
wherein said comparing the primary detection current value with the first current threshold comprises: calculating a sum of current thresholds in the capacitors in the n flexible circuit daughter boards as the first current threshold; and
wherein following said determining that the at least one capacitor is abnormal if the primary detection current value is greater than the first current threshold, the detection method further comprises:
removing one detachable resistor electrically connected to the detection terminal connected to the constant voltage;
keeping the detection terminal pair being connected to the same constant voltage source, and detecting a current in the loop where the detection terminal pair and the at least one capacitor are located to obtain a secondary detection current value;
comparing the secondary detection current value with a secondary current threshold, wherein the secondary current threshold is related to a number of remaining detachable resistors electrically connected to the detection terminals connected to the constant voltage other than the removed detachable resistor;
if the secondary detection current value is smaller than or equal to the secondary current threshold, determining that the flexible circuit daughter board, to which the capacitor electrically connected to the removed detachable resistor belongs, comprises the abnormal capacitor; and
if the secondary detection current value is greater than the secondary current threshold, determining that the flexible circuit daughter board, to which the capacitor electrically connected to the removed detachable resistor belongs, comprises no abnormal capacitor.