Capacitive in cell touch panel and display device
The present invention discloses a capacitive in cell touch panel and display device, wherein touch sensing electrodes are provided on a color filter substrate, the whole common electrode layer of the TFT array substrate is segmented into a plurality of strip-shaped structures functioning as touch driving electrodes, and the touch driving electrodes are driven in a time-sharing manner to achieve the touch function and the display function in a time-sharing manner. Since in the touch panel according to the present invention, structure of the common electrode layer of the TFT array substrate is altered to form the touch driving electrodes, it is not necessary to add a new film on the existing TFT array substrate and only an additional process needs to be added to segment the whole common electrode layer into a plurality of strip-shaped structures, reducing the production cost and increasing the production efficiency.
1. A capacitive in cell touch panel, including: a color filter substrate, a TFT array substrate, and a liquid crystal layer enclosed between the color filter substrate and the TFT array substrate, a plurality of pixel units arranged in a matrix form are provided on the TFT array substrate, wherein,
the color filter substrate includes a plurality of touch sensing electrodes extending along the column direction of the plurality of pixel units;
the TFT array substrate includes a plurality of touch driving electrodes extending along the row direction of the plurality of pixel units, the touch driving electrodes together constitute a common electrode layer of the TFT array substrate; and
within a time period for displaying one frame of images, the touch driving electrodes are used for transferring common electrode signals and touch scanning signals in a time-sharing manner.
2. A capacitive in cell touch panel according to claim 1 , wherein each of the plurality of touch driving electrodes corresponds to a plurality of rows of pixel units.
3. A capacitive in cell touch panel according to claim 2 , wherein every two adjacent rows of pixel units in the TFT array substrate forms a pixel units set, and two gate signal lines are provided between the two adjacent rows of pixel units in the pixel units set to provide gate scanning signals to the two adjacent rows of pixel units respectively.
4. A capacitive in cell touch panel according to claim 3 , wherein a common electrode signal line is provided at a gap between two adjacent pixel units sets and the common electrode signal line is electrically connected to a corresponding touch driving electrode.
5. A capacitive in cell touch panel according to claim 4 , wherein each of the plurality of touch driving electrodes is configured to have slit-shaped ITO electrodes at positions corresponding to aperture areas of the pixel units, and the plurality of touch driving electrodes are arranged above the pixel electrodes of the TFT array substrate.
6. A capacitive in cell touch panel according to claim 3 , wherein each of the plurality of touch driving electrodes is configured to have slit-shaped ITO electrodes at positions corresponding to aperture areas of the pixel units, and the plurality of touch driving electrodes are arranged above the pixel electrodes of the TFT array substrate.
7. A capacitive in cell touch panel according to claim 2 , wherein each of the plurality of touch driving electrodes is configured to have slit-shaped ITO electrodes at positions corresponding to aperture areas of the pixel units, and the plurality of touch driving electrodes are arranged above the pixel electrodes of the TFT array substrate.
8. A capacitive in cell touch panel according to claim 1 , wherein each of the plurality of touch driving electrodes is configured to have slit-shaped ITO electrodes at positions corresponding to aperture areas of the pixel units, and the plurality of touch driving electrodes are arranged above the pixel electrodes of the TFT array substrate.
9. A capacitive in cell touch panel according to claim 1 , wherein the plurality of touch sensing electrodes are arranged between a base substrate of the color filter substrate and color resin layer, or arranged on a surface of the color resin layer of the color filter substrate facing the liquid crystal layer.
10. A capacitive in cell touch panel according to claim 9 , wherein each of the plurality of touch sensing electrodes includes at least one longitudinal sensing sub-electrode having a projection located between two adjacent columns of pixel units on the TFT array substrate.
11. A capacitive in cell touch panel according to claim 10 , wherein each of the plurality of touch sensing electrodes includes at least one lateral sensing sub-electrode having a projection located at a gate signal line between two adjacent rows of pixel units on the TFT array substrate, and all the longitudinal sensing sub-electrodes of the same touch sensing electrode are electrically connected via the lateral sensing sub-electrode.
12. A capacitive in cell touch panel according to claim 11 , wherein the touch sensing electrode includes an ITO electrode or a metal electrode.
13. A capacitive in cell touch panel according to claim 10 , wherein the touch sensing electrode includes an ITO electrode or a metal electrode.
14. A display device, including the capacitive in cell touch panel according to claim 1 .