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Touch pressure detecting device and method

A detection device and detection method technology, applied in character and pattern recognition, print image acquisition, instruments, etc., can solve the problems of difficult mobile terminal implementation, complex structure, large volume, etc., and achieve low cost, small size, and high detection sensitivity Effect

Inactive Publication Date: 2015-11-25
SHENZHEN GOODIX TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The main purpose of the present invention is to provide a touch pressure detection device and method, aiming to solve the existing problems of complex structure, high cost, large volume and difficult implementation on mobile terminals.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0078] Compared with the first embodiment, the touch pressure detection device 100 of this embodiment is applicable to fingerprint sensor modules 110 of different sizes.

[0079] For example, assuming that the body part 20 is a finger, and the sensing units 113 are arranged in a matrix, the specific process of the touch pressure detection device 100 in the embodiment of the present invention is as follows:

[0080] (1) When there is no finger touch, such as when the device is started, a frame of data is collected as a reference when there is no finger touch, and the reference value of the i-th row and j-th column sensing unit is b i,j .

[0081] (2) Collect a frame of data, subtract the sampled data from the reference, and use the difference as the collected fingerprint information data. Note that the difference between the data output by the sensor unit in the i-th row and the j-th column and the reference is D i,j ,D i,j =x i,j -b i,j , where x i,j It is the sensing da...

no. 2 example

[0131] see Figure 12 , propose a second embodiment of the touch pressure detection method of the present invention, the method includes the following steps:

[0132] S21. Collect texture information data of body parts touching the fingerprint sensor module through multiple sensing units.

[0133] Specifically, a frame of no-load data without body parts is collected through multiple sensing units, and the no-load data is used as reference data; when a body part touches the fingerprint sensor module, a frame of sensing data is collected through multiple sensing units; The difference between the sensing data collected by each sensing unit and the reference data is used as the texture information data of the body part.

[0134] S22. Calculate the ridge deformation degree of the texture of the body part according to the collected texture information data.

[0135] Specifically, the degree of deformation of the ridge can be calculated by calculating the variance of the texture info...

no. 3 example

[0145] see Figure 13 1. A third embodiment of the touch pressure detection method of the present invention is proposed, the method includes the following steps:

[0146] S31. Collect texture information data of body parts touching the fingerprint sensor module through multiple sensing units.

[0147] Specifically, a frame of no-load data without body parts is collected through multiple sensing units, and the no-load data is used as reference data; when a body part touches the fingerprint sensor module, a frame of sensing data is collected through multiple sensing units; The difference between the sensing data collected by each sensing unit and the reference data is used as the texture information data of the body part.

[0148] S32. Calculate the average value of the currently collected texture information data.

[0149] Average value of texture information data The calculation formula is:

[0150] D ‾ = 1 ...

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Abstract

The invention discloses a touch pressure detecting device and method. The device comprises a fingerprint sensor module and a touch pressure calculating module. The fingerprint sensor module comprises a plurality of induction units and is used for collecting texture information data of a body part touching the fingerprint sensor module through the induction units. The touch pressure calculating module is used for calculating the touch pressure of the body part according to the collected texture information data. Therefore, touch pressure is detected through a fingerprint sensor in the prior art. According to the touch pressure detecting scheme, no additional physical hardware or structure or assembly design is needed, additional cost expense is basically avoided, and under the condition that fingerprint recognition of a mobile terminal becomes more and more popular, application and popularization are easy. Compared with a touch pressure detecting method in the prior art, the touch pressure detecting device is high in detecting sensitivity, simple in implementation structure, low in cost and small in size.

Description

technical field [0001] The invention relates to the technical field of pressure detection, in particular to a touch pressure detection device and method. Background technique [0002] At present, there are few products on the market that can detect touch pressure (such as finger pressure), especially products that are easy to implement touch pressure detection on mobile terminals such as mobile phones. Existing touch pressure detection devices mainly adopt piezoresistive detection schemes, the principle of which is: a piezoresistive pressure sensor is installed under the target detection panel. When the panel is pressed, the panel will have a small stroke with the pressing force, so It causes the resistance value of the piezoresistor installed below to change, and the touch pressure is quantified according to the change in resistance value. [0003] The aforementioned detection scheme has the following problems: [0004] 1. Difficult to realize the structure: This kind of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041G06K9/00
CPCG06V40/1306G06V40/1359G06F3/0416G06F2203/04105G06F3/0414G06F21/32G06F3/041G06V40/1376
Inventor 武丹邓耿淳叶金春陈伟文
Owner SHENZHEN GOODIX TECH CO LTD
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