Pressure sensing input module

Abstract

The invention provides a pressure sensing input module, which comprises at least one first pressure-sensitive unit and at least one second pressure-sensitive unit, wherein the at least one first pressure-sensitive unit and the at least one second pressure-sensitive unit are arranged on the upper surface and the lower surface of a substrate; the at least one first pressure-sensitive unit and the at least one second pressure-sensitive unit are correspondingly arranged one by one and are made of the same material; the at least one first pressure-sensitive unit, the second pressure-sensitive unit corresponding to the first pressure-sensitive unit and two peripheral reference resistors form a Wheatstone bridge; the Young modulus and the thicknesses of the substrate and a coating layer are regulated, and the pattern shapes of each first pressure-sensitive unit and each second pressure-sensitive unit and the arrangement modes of the pattern shapes are regulated to obtain the pressure sensing input module which is insensitive to temperature and has high pressure sensing sensitivity.

Description

【Technical field】 [0001] The invention relates to the field of pressure sensing, in particular to a pressure sensing input module. 【Background technique】 [0002] With the continuous updating of touch input technology in recent years, flat touch panels have become the first choice for input devices. Recently, a pressure sensing device that brings a new touch experience has caused a wave of enthusiasm in the field of touch input devices. This pressure sensing device can detect the change in resistance of the pressure sensing unit after pressing, Determining the magnitude of the pressing pressure can be used alone in the field of touch input devices that only need to detect the magnitude of the pressure, and can also be combined with the traditional flat touch panel to take into account the detection of two-dimensional coordinates and three-dimensional touch pressure. [0003] However, due to the limitation of the pressure sensing electrode material, the existing materials wi...

AI Technical Summary

Problems solved by technology

[0003] However, due to the limitation of the pressure sensing electrode material, the existing materials will inevitably be affected by the temperature of the finger, resulting in a certain resistance change, and the resistance change caused by the temperature change greatly affects the pressing force. There may even be a change in resistance value due to temperature that is much greater than the change in resistance value due to pressure, resulting in inaccurate or even impossible detection of pressure resistance change.

Images