Backlight control circuit, control method thereof and display device

    公开(公告)号:US12058795B1

    公开(公告)日:2024-08-06

    申请号:US18014572

    申请日:2021-12-27

    IPC分类号: H05B47/10 G09G3/20 H05B47/11

    CPC分类号: H05B47/11

    摘要: In the backlight control circuit; a luminous flux sensing sub-circuit senses luminous flux of a display device, obtains and outputs a first control signal from a first control signal output terminal; a control sub-circuit includes N control units each including a first/second sub-unit; the first sub-unit connects or disconnects an output terminal of the second sub-unit and the backlight control signal output terminal under the control of the first control signal, the second sub-unit connects or disconnects a signal input terminal and the output terminal of the second sub-unit under the control of the second control signal; the N second control signal output terminals provide effective second control signals in a time division manner; conduction thresholds corresponding to the N first sub-units increase sequentially, and when a corresponding relationship between the first control signal and the conduction threshold is met, the first transistor is turned on.

    Shift register unit, shift register, display panel and driving method thereof

    公开(公告)号:US11574575B2

    公开(公告)日:2023-02-07

    申请号:US17555153

    申请日:2021-12-17

    IPC分类号: G09G3/20 G11C19/28

    摘要: Provided are a shift register unit, a shift register, a display panel and a driving method thereof. The shift register unit includes: an input circuit electrically coupled to an input terminal, a first voltage terminal and a pull-up node; an output circuit electrically coupled to the pull-up node, a first clock terminal, a first scan control terminal, a first output terminal and a second output terminal; and a scan control circuit electrically coupled to the second output terminal, a second voltage terminal and a second scan control terminal. The input circuit is configured to write a first voltage provided by the first voltage terminal into the pull-up node in response to a start signal inputted to the input terminal. The output circuit is configured to output a first clock signal from the first clock terminal via the first output terminal, when the pull-up node is at the first voltage.