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A pressure sensing apparatus

A technology of pressure sense and pressure, applied in the measurement of the property force of piezoelectric resistance materials, instruments, electrical digital data processing, etc., can solve the problem that the resistance value of the pressure sensing layer becomes larger, and the pressing force and resistance value cannot be obtained. Improve pressure sensing sensitivity, improve user satisfaction, and achieve accurate detection effects

Active Publication Date: 2015-12-02
TPK TOUCH SOLUTIONS (XIAMEN) INC
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Problems solved by technology

However, ITO material is a typical positive temperature coefficient material, and its resistance value will increase with the increase of temperature. If it is used in pressure sensing, it will cause heat transfer from the finger when it is in contact with the touch panel. to the pressure sensing layer of the touch panel, so that the resistance value of the pressure sensing layer of the ITO material becomes larger
Therefore, if a single positive temperature coefficient material is used for pressure sensing, it is impossible to obtain accurate pressing force due to the existence of temperature

Method used

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Embodiment Construction

[0047] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and implementation examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0048] A positive temperature coefficient material means that its own resistance value increases with increasing temperature. In positive temperature coefficient materials, the remaining positively charged ions after removing free electrons from atoms in the positive temperature coefficient material block the electrons from directional movement. When the temperature is higher, the vibration of the positively charged ions in the equilibrium position is more severe, and the blocking effect on electrons The better, therefore, the higher its resistance value.

[0049] The negative tem...

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Abstract

The invention provides a pressure sensing apparatus including a pressure sensing layer which further includes a plurality of pressure sensing units. Each pressure sensing unit comprises at least one kind of positive temperature coefficient materials and at least one kind of negative temperature coefficient materials. The pressure sensing unit detects resistance variation generated after the pressure sensing layer is pressed. The negative temperature coefficient materials are used for compensating for changes of resistance values due to temperatures after the positive temperature coefficient materials are pressed so as to making the pressure sensing apparatus to be insensitive to the temperatures.

Description

【Technical field】 [0001] The invention relates to the field of pressure sensing, in particular to a pressure sensing device. 【Background technique】 [0002] With the continuous updating of touch panel technology in recent years, the touch panel has become the product of choice for display devices. Recently, a pressure sensing device that brings a new touch experience has caused a wave of enthusiasm in touch panels. This pressure sensing device can detect the change in resistance of the pressure sensing unit after pressing, and accurately Determining the magnitude of the pressing pressure can be used alone in the touch field that only needs to detect the magnitude of the pressure, and can also be combined with the traditional touch panel to take into account the precise detection of two-dimensional coordinates and three-dimensional touch pressure. [0003] The pressure sensing can detect the change of the resistance signal of the pressure sensing unit in the pressing area th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/18
CPCG06F3/0418
Inventor 陈风牟方胜刘仁昌纪贺勋
Owner TPK TOUCH SOLUTIONS (XIAMEN) INC
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