Strip-type self-capacitive touch panel and touch system

Abstract

The invention provides a strip-type self-capacitive touch panel and a touch system. The touch panel comprises an induction electrode, a PCB and a device wiring layer. The induction electrode is arranged on the upper surface of the PCB, the device wiring layer is disposed on the lower surface of the PCB and internally provided with a touch panel controller and multiple first electric interconnection lines, the touch panel controller is connected with the induction electrode through the first electric interconnection lines and provides electric signals for the induction electrode, and capacitance variable quantities of capacitance corresponding to the areas, where fingers touch or get close, in the induction electrode and the variation sequence of the maximum capacitance variable quantity are monitored. The PCB only needs to be designed to be of a two-layer structure, and complexity of the manufacturing process and manufacturing cost of the touch panel can be remarkably reduced.

Description

technical field [0001] The invention relates to a touch panel and a touch control system, in particular to a bar-shaped self-capacitance touch panel and a touch control system. Background technique [0002] Wearable devices are becoming increasingly ubiquitous, and the way they operate is constantly challenged by ease of use. Bar-shaped capacitive touchpads have become the mainstream touchpads in wearable devices because of their advantages such as convenient operation, natural interaction, and strong resistance to false triggers. The existing bar-shaped capacitive touch panel is mainly realized by mutual capacitance technology, that is, by arranging upper and lower layers of grid lines in the bar-shaped touch area to sense the touch action of the finger, so as to obtain the user's operation gesture. It is generally made of a four-layer PCB structure, which are row scan lines, column scan lines, ground layers, and device layers. When a finger touches the intersection of row...

AI Technical Summary

Problems solved by technology

figure 1 It is a structural schematic diagram of the sensing electrodes of the existing self-capacitive touch panel, such as figure 1 As shown, when the finger touches the wider and narrower parts of the wedge-shaped electrode 101 in the sensing electrode 100, the capacitance in the touch panel changes nonlinearly. In any microscopic state, two wedge-shaped electrodes 101 need to work together This non-linearity can be eliminated. In this way, the correction algorithm of the touchpad controller control software will be more complicated, and the number of wedge-shaped electrodes required per unit area of ​​the touchpad is also large.

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