IN-CELL TOUCH DISPLAY DEVICE HAVING INCREASED S/N RATIO DURING TOUCH CONTROL THEREOF
First Claim
1. An in-cell touch display device comprising:
- a touch control display panel having common electrodes;
a common voltage generating circuitry electrically coupled to the common electrodes of the touch control display panel and configured to output a first common voltage and a second common voltage to the common electrodes at different time periods; and
a detecting module configured to detect an actual voltage of the common electrodes and determine a variation between the actual voltage and the first common voltage to adjust the second common voltage according to the variation.
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Accused Products
Abstract
An in-cell touch display device includes a touch control display panel, a common voltage generating circuitry and a detecting module. The touch control display panel has common electrodes in electrical connection with the common voltage generating circuitry and the detecting module and touch control sensing electrodes. The common voltage generating circuitry is provided for outputting a first common voltage and a second common voltage to the common electrodes in different time periods. The detecting module detects actual voltage of the common electrodes and determines a variation between the actual voltage and the first common voltage to thereby adjust the second common voltage according to the variation.
14 Citations
10 Claims
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1. An in-cell touch display device comprising:
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a touch control display panel having common electrodes; a common voltage generating circuitry electrically coupled to the common electrodes of the touch control display panel and configured to output a first common voltage and a second common voltage to the common electrodes at different time periods; and a detecting module configured to detect an actual voltage of the common electrodes and determine a variation between the actual voltage and the first common voltage to adjust the second common voltage according to the variation.
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- 2. The in-cell touch display device 1, wherein the first common voltage is related to a direct current having a first voltage and the second common voltage is related to an alternating current having a second voltage and a third voltage, wherein when the actual voltage is larger than the first voltage of the first common voltage, each of the second and third voltages of the second common voltage is added with the variation, and wherein when the actual voltage is smaller than the first voltage of the first common voltage, each of the second and third voltages of the second common voltage is reduced by the variation.
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7. An in-cell touch display device comprising:
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a touch control display panel for showing pictures and receiving a touch control operation, having a plurality of common electrodes; a common voltage generating circuitry electrically coupled to the common electrodes of the touch control display panel and configured to output a first common voltage and a second common voltage to the common electrodes of the touch control display panel at different time periods; a timing controller; a source electrode driver in electrical connection with the touch control display panel; a gate electrode driver in electrical connection with the touch control display panel; a touch control sensing circuitry in electrical connection with the touch control display panel, wherein the timing controller receives horizontal synchronization signals and outputs gate electrode control signals to the gate electrode driver, source electrode control signals and picture data to the source electrode driver, common voltage control signals to the common voltage generating circuitry, and touch control signals to the touch control sensing circuitry; and a detecting module configured to detect an actual voltage of the common electrodes and determine a variation between the actual voltage and the first common voltage to adjust the second common voltage according to the variation. - View Dependent Claims (8, 9, 10)
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Specification