Touch detection method and apparatus for touch screen and touch screen

Abstract

The present invention discloses a touch detection method and apparatus for a touch screen and the touch screen. The apparatus comprises a display panel, a sensing circuit and a control circuit, wherein the sensing circuit comprises at least two sensing loops. The method comprises: performing charging and discharging potential detection on each sensing loop in the sensing circuit at a preset frequency, and acquiring potential values of both ends of each sensing loop; comparing a variation value, when each potential value changes, with a preset threshold, and determining whether an object touches the touch screen; and when the variation value of each potential value exceeds the preset threshold, carrying out calculation to obtain a sensing capacitance value of a sensing capacitance formed between the object and the touch screen when the object touches the touch screen, and a resistance value between the contact point and the sending port in the sensing circuit. According to the touch detection method and apparatus for the touch screen and the touch screen provided by the present invention, the technical problem in the prior art of high manufacturing cost and manufacturing difficulty caused by a large number of sensing loops, sending ports and receiving ports on the touch screen is solved.

Description

technical field [0001] The present invention relates to the field of touch sensitive screens, in particular to a touch detection method and device for a touch screen and a touch screen. Background technique [0002] Currently, capacitive touch sensing technology is widely used in touch panel and touch screen technologies. Such as figure 1 as shown, figure 1 It is a schematic diagram of a detection scheme in a typical capacitive touch sensing technology, wherein Txi (i=1...15) is a detection signal sending port, and Rxj (j=1...9) is a detection signal receiving port. The cable connected to the sending port is a sending line, and the cable connected to the receiving port is a receiving line, and the sending line and the receiving line are respectively routed on two planes parallel to each other. Mutual capacitance is formed at the upper and lower intersection planes between the transmission line and the reception line. [0003] When the touch panel or touch screen is worki...

AI Technical Summary

Problems solved by technology

[0011] Embodiments of the present invention provide a touch detection method and device for a touch screen, and a touch screen, so as to at least solve the manufacturing cost caused by the large number of sensing circuits, sending ports, and receiving ports on the touch screen in the prior art and manufacturing difficult technical issues

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