US Patent No. 10,219,341

CURRENT CONTROL CIRCUIT AND METHOD FOR CONTROLLING THE SAME, BACKLIGHT ASSEMBLY AND DISPLAY DEVICE


Patent No. 10,219,341
Issue Date February 26, 2019
Title Current Control Circuit And Method For Controlling The Same, Backlight Assembly And Display Device
Inventorship Siqing Fu, Beijing (CN)
Xinghong Liu, Beijing (CN)
Shuai Chen, Beijing (CN)
Assignee BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN) CHONGQING BOE OPTOELECTRONICS...

Claim of US Patent No. 10,219,341

1. A current control circuit comprising: a current regulator, a current detector, a voltage detector, a switching circuit, a controlled circuit, and a reference voltage setting device;the current detector for detecting a current of the controlled circuit is electrically connected with the switching circuit, the controlled circuit and a ground,
the voltage detector is configured to detect a voltage across at least a portion of the controlled circuit, and a first output terminal of the voltage detector is electrically connected with the reference voltage setting device;
a first input terminal of the current regulator is electrically connected with the reference voltage setting device;
the switching circuit is configured to switch between a first connection state and a second connection state, wherein
in the first connection state, the switching circuit electrically connects a second input terminal of the current regulator with the current detector, and the current detector converts a current detected by itself into a voltage signal and outputs the same to the second input terminal of the current regulator, and the current regulator adjusts a current flowing in the controlled circuit according to the voltage signal output by the current detector and a first reference voltage output by the reference voltage setting device to reach a first current;
in the second connection state, the switching circuit electrically connects the second input terminal of the current regulator with a second output terminal of the voltage detector and simultaneously short-circuits the current detector, and the current regulator adjusts the current flowing in the controlled circuit according to a second reference voltage output by the reference voltage setting device and the voltage output by the voltage detector to reach the first current, and wherein
the second reference voltage is a voltage detected by the voltage detector in the first connection state.