Touch display device and driving method thereof
First Claim
1. A driving method of a touch display device, wherein the touch display device comprises a liquid crystal display panel having a plurality of self-capacitive electrodes for performing black and white display, and an electroluminescent display panel arranged under the liquid crystal display panel for performing color display, the self-capacitive electrodes in the liquid crystal display panel and a cathode in the electroluminescent display panel constitute capacitive structures;
- the driving method comprising;
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;
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 so as to determine a pressure at the touch position.
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Accused Products
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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Citations
18 Claims
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1. A driving method of a touch display device, wherein the touch display device comprises a liquid crystal display panel having a plurality of self-capacitive electrodes for performing black and white display, and an electroluminescent display panel arranged under the liquid crystal display panel for performing color display, the self-capacitive electrodes in the liquid crystal display panel and a cathode in the electroluminescent display panel constitute capacitive structures;
- the driving method comprising;
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; 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 so as to determine a pressure at the touch position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
- the driving method comprising;
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17. A touch display device comprising:
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a liquid crystal display panel having a plurality of self-capacitive electrodes for performing black and white display; an electroluminescent display panel arranged under the liquid crystal display panel for performing color display, wherein the self-capacitive electrodes in the liquid crystal display panel and a cathode in the electroluminescent display panel constitute capacitive structures; a touch detection chip configured to in a touch detection time period, apply a first touch detection signal to the self-capacitive electrodes and the cathode simultaneously, and detect change of a capacitance value of a self capacitance corresponding to each self-capacitive electrode so as to determine a touch position;
in a pressure detection time period, apply a second touch detection signal to the self-capacitive electrodes or the cathode, and detect changes of capacitance values of capacitances formed between the self-capacitive electrodes and the cathode so as to determine a pressure at the touch position. - View Dependent Claims (18)
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Specification