Capacitive touch control panel

Abstract

The invention discloses a capacitive touch control panel, which comprises a plurality of scanning lines, a plurality of reading lines and a plurality of capacitive sensing devices, wherein each capacitive sensing device comprises a transistor, a sensing unit and a reading circuit, each transistor is provided with a control end, a first end and a second end, the control end is used for receiving a first control signal for controlling the break-and-make state of the corresponding transistor; each sensing unit is provided with a third end and a fourth end, the third end electronically couples the first end to an operation node, the fourth end is used for receiving a second control signal, each sensing unit is used for generating a dynamic signal at the operation node, and each reading circuit is electrically connected with the corresponding second end and is used for outputting a sensing output value according to the dynamic signal of the operation node when the transistor is conducted. The capacitive touch control panel provided by the invention has the advantages that the touch control judging precision after the capacitive sensing devices are touched and controlled can be improved, and the large dimension of the touch control panel is realized.

Description

technical field [0001] The present invention relates to a touch panel, in particular to a capacitive touch panel. Background technique [0002] See figure 1 and figure 2 , figure 1 Shown is a schematic diagram of a capacitive touch panel in the prior art, figure 2 shown as figure 1 The equivalent circuit diagram of the capacitive sensing device in . The capacitive touch panel 1 includes a plurality of scanning lines G1-Gn (wherein, n is a positive integer), a plurality of reading lines R1-Rn (wherein, n is a positive integer), and a plurality of capacitive sensors arranged in an array. Measuring device 4 and position judging unit 5. Wherein, the scanning lines and the reading lines are arranged vertically and alternately, and define a plurality of areas, and each area is provided with a corresponding capacitive sensing device 4 . The capacitive sensing device 4 includes a sensing capacitor Cv (wherein Cv is also used to represent its capacitance value) and a reading...

AI Technical Summary

Problems solved by technology

For example, when a capacitive touch panel with a resolution of 200×100 has a voltage signal difference close to △V[(Cv-Cv') / (100Cx+Cr)], its Compared with a capacitive touch panel with a resolution of 4×5, the voltage signal difference may be less than 10 times. Without improving the resolution capability of the back-end IC, it may cause the back-end IC to be unable to interpret, making the capacitive touch panel The difficulty of implementing a touch panel on a large-size touch panel increases

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