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

Claim 13:
14. The detection method according to claim 12,
wherein each of the plurality of flexible circuit daughter boards comprises p capacitors, where p is an integer and p≥2; and the p capacitors comprise a first capacitor, a second capacitor . . . , and a pth capacitor;
wherein for one flexible circuit daughter board and one detection terminal group corresponding to the flexible circuit daughter board:
the detection terminal group comprises a first common terminal and at least one second common terminal, wherein the first electrode plate of each capacitor in the flexible circuit daughter board is connected to the first common terminal, and the at least one second common terminal is electrically connected to the second electrode plates of m capacitors, where m is a positive integer and p≥m≥2;
the flexible circuit mother board further comprises a plurality of detachable resistors, each of the m capacitors electrically connected to the same second common terminal corresponds to one of plurality of detachable resistors, and the second electrode plate of each of the m capacitors is electrically connected to the at least one second common terminal through the corresponding detachable resistor;
wherein said detecting the detection terminal pair comprising two detection terminals in the detection terminal group comprises: detecting the detection terminal pair comprising the first common terminal and the second common terminal;
wherein said connecting the detection terminal pair to the constant voltage source comprises: connecting the first common terminal to ground, and connecting the second common terminal to the constant voltage; and
wherein after determining that the at least one capacitor includes an abnormal capacitor 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 second common terminal;
keeping the detection terminal pair being connected to the same constant voltage source, and detecting a current in a loop where the detection terminal pair and the capacitors 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 second common terminal 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 capacitor electrically connected to the removed detachable resistor is abnormal; and
if the secondary detection current value is greater than the secondary current threshold, determining that the capacitor electrically connected to the removed detachable resistor is normal.