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

Claim 14:
15. A detection method of a flexible circuit mother board, the flexible circuit mother board comprising:
a plurality of flexible circuit daughter boards;
at least one detection terminal group; and
a plurality of external pad groups corresponding to the plurality of flexible circuit daughter boards in one-to-one correspondence,
wherein each of the plurality of flexible circuit daughter boards has a bonding pad area adjacent to a corresponding one of the plurality of external pad groups,
wherein each of the at least one detection terminal group detects at least one of the plurality of flexible circuit daughter boards, and each of the at least one detection terminal group comprises a plurality of detection terminals; and
wherein each of the plurality of flexible circuit daughter boards comprises a plurality of capacitors, each of the plurality of capacitors comprises a first electrode plate and a second electrode plate, and each of the first electrode plate and the second electrode plate is electrically connected to one of the plurality of detection terminals,
wherein the detection method being used to detect the flexible circuit mother board and comprises:
placing the flexible circuit mother board in an aging detection environment, and monitoring the flexible circuit mother board in real time;
pairing two of the plurality of detection terminals of one of the at least one detection terminal group to form a detection terminal pair for detecting, wherein one detection terminal of the detection terminal pair is electrically connected to at least one first electrode plate of the plurality of capacitors of at least one of the plurality of flexible circuit daughter boards, and the other one detection terminal of the detection terminal pair is electrically connected to at least one second electrode plate of the plurality of capacitors of at least one of the plurality of flexible circuit daughter boards;
connecting the detection terminal pair to a constant voltage source, wherein one detection terminal of the detection terminal pair is grounded, and the other one detection terminal of the detection terminal pair is connected to a constant voltage having a voltage value smaller than or equal to a withstand voltage value of the at least one capacitor electrically connected the detection terminal pair;
detecting a current in a loop where the detection terminal pair and the at least one capacitor are located to obtain a primary detection current value; and
comparing the primary detection current value with a first current threshold corresponding to the detection terminal pair, wherein in response to a comparison result of the primary detection current value being greater than the first current threshold, it is determined that the at least one capacitor is abnormal; and in response to a comparison result of the primary detection current value being smaller than or equal to the first current threshold, it is determined that each of the at least one capacitor is normal.