PIXEL CIRCUIT, DISPLAY DEVICE AND DRIVING METHOD

    公开(公告)号:US20210012698A1

    公开(公告)日:2021-01-14

    申请号:US16308437

    申请日:2018-04-19

    IPC分类号: G09G3/20 G09G3/36

    摘要: A pixel circuit includes a liquid crystal capacitor, a selection unit, a gray scale writing unit, and a reset unit. The selection unit is configured to determine whether to charge the liquid crystal capacitor according to a row control signal and a column control signal. The gray scale writing unit is configured to apply a gray scale voltage signal to the liquid crystal capacitor, when the selection unit determines to charge the liquid crystal capacitor, and an application duration of the gray scale voltage signal controls a gray scale level displayed by the liquid crystal capacitor. The reset unit is configured to disconnect the gray scale writing unit and the liquid crystal capacitor to stop charging the liquid crystal capacitor upon receiving the reset signal, and reset the voltage of the liquid crystal capacitor to an initial state.

    Shift register unit, driving method thereof, gate driving circuit and display device

    公开(公告)号:US10467937B2

    公开(公告)日:2019-11-05

    申请号:US15577740

    申请日:2017-05-10

    IPC分类号: G09G3/20 G11C19/28 G11C19/18

    摘要: The disclosure discloses a shift register unit, a driving method thereof, a gate driving circuit and a display device. The shift register unit comprises an input circuit, a reset circuit, a control circuit, a pull-down circuit and an output circuit, a first control terminal of the output circuit is coupled to a first node, its first input terminal is coupled to a second clock signal terminal, its first output terminal is coupled to a signal output terminal, both terminals of the pull-down circuit are coupled to a first clock signal terminal and the first node, respectively, and the pull-down circuit may pull down the potential of the first node via the first clock signal terminal, which may thus avoid that the potential of the first node also rises when the potential of the second clock signal terminal rises, and the signal of the second clock signal terminal is mistakenly provided to the signal output terminal to cause various poor display.

    Device and method for detecting performance of panel driving circuit

    公开(公告)号:US10235915B2

    公开(公告)日:2019-03-19

    申请号:US15512640

    申请日:2016-09-05

    摘要: This disclosure relates to a device and method for detecting performance of panel driving circuit. The device comprises a plurality of point light sources, a plurality of optical fibers, a light source driving circuit and a detection circuit. The predetermined point light sources are corresponding to predetermined optical fibers, the predetermined optical fibers being one optical fiber or multiple optical fibers of a predetermined combination corresponding to elements of the panel driving circuit. The optical fibers are configured for transmitting the light emitted by the point light sources onto the elements of the panel driving circuit. The detection circuit is for obtaining a performance parameter of the element of the panel driving circuit based on a corresponding relationship between an intensity of illumination for the element of the panel driving circuit and a current value of the element as well as an output signal of the panel driving circuit.

    Touch feedback circuit, driving method thereof and touch display device

    公开(公告)号:US10031616B2

    公开(公告)日:2018-07-24

    申请号:US15200672

    申请日:2016-07-01

    摘要: A touch feedback circuit and driving method thereof, and a touch display device are disclosed, so that the user's finger can feel feedback from a touch display, thereby improving the user experience. The touch feedback circuit comprises a deformation element, at least one control module, a control line, a first signal line and a first voltage terminal, wherein the control module is configured to output a signal provided by the first signal line to the deformation element under the control of the control line, the deformation element is configured to deform under the control of the control module and the first voltage terminal, the control line and the first signal line are used to control the deformation element corresponding to a determined touch position. The control module may also include a first to fourth control sub-module, and the touch feedback circuit may also include a first to fourth signal line and first and second voltage terminals, wherein each of the control sub-modules of the control module causes the deformation element to deform more under the control of the control line and the first to fourth signal line. Embodiments of the present disclosure further provide a method for driving the touch feedback circuit and a display device having the touch function.