Pressure sensing method and system thereof

A sensing method and pressure sensing technology, which is applied in instruments, calculations, electrical digital data processing, etc., can solve problems such as the influence of temperature factors in pressure sensing, and achieve the effect of accurate detection

Active Publication Date: 2016-08-31
TPK TOUCH SOLUTIONS (XIAMEN) INC
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  • Abstract
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Problems solved by technology

[0005] In order to overcome the current problem that pressure sensing is affected by temperature factors, the present invention provides a novel pressure sensing method and its system

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  • Pressure sensing method and system thereof
  • Pressure sensing method and system thereof
  • Pressure sensing method and system thereof

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[0035] 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.

[0036] On a pressure touch screen, the resistance of the sensing electrode changes due to pressure changes and temperature changes during the finger pressing process. The resistance value change caused by the pressure is expressed as ΔR0F, and the resistance value change caused by the temperature change before and after pressing is Expressed as ΔR0T. Wherein, the resistance change ΔR0F caused by the pressure is proportional to the pressing force, and the resistance change ΔR0T caused by the temperature change before and after pressing is related to the material of the sensing elect...

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Abstract

The invention provides a pressure sensing method and system thereof. The method comprises following steps: solving an equation of a function relationship in order to obtain variations in resistance value induced by pressure at a compression position and obtaining compression magnitude at the compression position based on variations in resistance value. The function relationship is formed among resistance variations induced by pressure of a finger compression position, resistance variations induced by temperature, resistance variations induced by compression force of at least two sensing electrodes adjacent to the compression position. The pressure sensing method and system thereof have following beneficial effects: based on a function relationship, pressure-induced variations in resistance value at the compression position and variations in resistance value induced by temperature variations are obtained by solving the equation; and based on variations in resistance value, real compression force magnitude and real temperature at the compression position can be detected.

Description

【Technical field】 [0001] The present invention relates to the field of pressure touch sensing, in particular to a pressure sensing method and system thereof. 【Background technique】 [0002] Touch panels are widely used in various consumer electronic devices, such as portable electronic products such as smart phones, tablet computers, cameras, e-books, and MP3 players, or display screens for operating control devices. In recent years, a touch panel capable of detecting pressure pressure has attracted extensive attention. [0003] In the prior art, pressure-sensing electrode blocks are generally used to detect the change of resistance value before and after pressure to judge the pressing force. However, due to the limitations of common piezoresistive materials, the resistance change will inevitably be affected by the ambient temperature. For example, the resistance value will be affected by the temperature (environmental temperature or the temperature of the touch operation f...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041
CPCG06F3/0414G06F2203/04105
Inventor 蒋承忠陈风危伟李裕文
Owner TPK TOUCH SOLUTIONS (XIAMEN) INC
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