In-cell touch display panel, driving method thereof, and display device

    公开(公告)号:US10698521B2

    公开(公告)日:2020-06-30

    申请号:US15110359

    申请日:2015-11-05

    Abstract: The present application provides an in-cell touch display panel, a driving method thereof, and a display device. At least two sub-pixels are a sub-pixel group, cathode layers of different sub-pixel groups are independent of each other, which is equivalent to that the cathode layer set as a whole surface in the prior art is segmented, one sub-pixel group corresponds to one segmented cathode layer, cathode layers of respective sub-pixel groups are connected through conductive lines to the driver chip, so that the cathode layer is reused as a self-capacitive touch control electrode, the driver chip detects a capacitance variation of the cathode layer through the conductive line corresponding thereto to determine a touch location, thus achieving the touch control function. In the in-cell touch display panel, signals outputted by the driver chip to respective signal terminals of a sub-pixel circuit and the cathode layer in a fourth stage are obtained by superimposing the same touch scanning signal on basis of signals outputted to the respective signal terminals and the cathode layer in a third stage, so that the operating state of each module in the sub-pixel circuit is the same as that in the third stage, which ensures normal display, therefore an in-cell touch display panel based on OLED panel is achieved.

    Display panel and display device
    94.
    发明授权

    公开(公告)号:US10401691B2

    公开(公告)日:2019-09-03

    申请号:US15039122

    申请日:2015-09-21

    Abstract: A display panel and a display device are provided. The display panel includes a plurality of gate lines, a plurality of data lines and a plurality of sub-pixels (11) formed by the plurality of gate lines and the plurality of data lines intersecting with each other, and the plurality of sub-pixels (11) forming an array. In the array formed by the plurality of sub-pixels (11), a ratio of a width in a row direction to a height in a column direction of each sub-pixel (11) is greater than 1:3, and a first row of sub-pixels and a second row of sub-pixels are alternately arranged in the column direction. Each sub-pixel (11) in the first row of sub-pixels and its adjacent sub-pixel in the second row of sub-pixels have different colors. Each sub-pixel (11) in the second row of sub-pixels and its adjacent sub-pixel in the first row of sub-pixels have different colors. The sub-pixel (11) in the second row of sub-pixels and the sub-pixel (11) in the first row of sub-pixels which are provided in a same column are staggered by a distance of d in the row direction, where 0≤d

    Touch display device and driving method thereof

    公开(公告)号:US10318081B2

    公开(公告)日:2019-06-11

    申请号:US15516072

    申请日:2016-09-05

    Abstract: A touch display device and a driving method are disclosed. The touch display device includes a liquid crystal display panel having a plurality of self-capacitive electrodes and an electroluminescent display panel arranged under the liquid crystal display panel. The self-capacitive electrodes in the liquid crystal display panel and a cathode in the electroluminescent display panel constitute capacitive structures. The driving method includes in a touch detection time period, applying a first touch detection signal to the self-capacitive electrodes and the cathode simultaneously, and detecting change of a capacitance value of a self capacitance corresponding to each self-capacitive electrode so as to determine a touch position; and in a pressure detection time period, applying a second touch detection signal to the self-capacitive electrodes or the cathode, and detecting changes of capacitance values of capacitances formed between the self-capacitive electrodes and the cathode to determine a pressure at the touch position.

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