Device and method for eliminating coupling capacitance

Abstract

The invention provides a device for eliminating coupling capacitance, which is applied to a capacitive touch-control panel. The capacitive touch-control panel comprises a plurality of touch-control pads. The device for eliminating the coupling capacitance comprises a touch-control sensing module and a coupling capacitance eliminating module. When a touch-control point is formed on the capacitive touch-control panel, the touch-control sensing module detects a capacitance variation value of each touch-control pad in the plurality of touch-control pads respectively. The coupling capacitance eliminating module determines a capacitance coupling value by the plurality of capacitance variation values according to a preset rule and adjusts the plurality of capacitance variation values according to the capacitance coupling value to generate a plurality of adjusted touch-control capacitance variation values corresponding to the plurality of touch-control pads. The invention also provides a method for eliminating the coupling capacitance. By the device and the method for eliminating the coupling capacitance, the influence of a capacitance coupling effect between the capacitive touch-control panel and mechanism environment on the capacitance variation values can be eliminated.

Description

technical field [0001] The present invention relates to a touch panel, in particular to a coupling capacitance elimination device and method capable of dynamically adjusting changes in coupling strength caused by touch to eliminate the capacitive coupling effect between a capacitive touch panel and a mechanism environment. Background technique [0002] Generally speaking, touch panels can be roughly classified into resistive, capacitive, ultrasonic, optical (such as infrared) and other types according to different sensing principles. Among them, the capacitive touch panel can be sensed only by a light touch, and the contact between the finger and the touch panel will hardly cause wear and tear. It not only has stable performance but also has a long service life, so it has been widely used in various fields. in electronic products. [0003] Please refer to Figure 1A and Figure 1B , Figure 1A and Figure 1B A timing diagram of a conventional capacitive touch sensing devi...

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Problems solved by technology

[0006] Although a method of adding a layer of non-conductive adhesive film about 0.05 cm thick between the liquid crystal display module 22 and the capacitive touch panel 20 has been adopted to improve the capacitive coupling interference of the capacitive touch panel 20 due to the mechanism, however, Not only does it increase the thickness and cost of the product, but the entire touch display device also needs to be adjusted accordingly for different situations in which the capacitive touch panel 20 is integrated into different liquid crystal display modules 22, which is quite inconvenient and reduces production efficiency.

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