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Flexible sensor with positioning and pressure detection functions and manufacturing method thereof

A technology of flexible sensor and manufacturing method, which is applied in the measurement of the property and force of piezoelectric devices, instruments, and the input/output process of data processing, etc., which can solve the problem of inability to accurately identify the size of finger contact force, reduce human-computer interaction experience, Sensing sensitivity drops and other issues to achieve good user experience, improve flexibility, and reduce conditional constraints

Active Publication Date: 2020-01-21
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After this type of touch screen is wet, its sensing sensitivity will drop a lot or even fail to work normally, so it cannot be used in a wet environment
On the other hand, the capacitive touch screen can only realize the positioning function of one or more points on the plane, and cannot accurately identify the finger contact force, which reduces the human-computer interaction experience.

Method used

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  • Flexible sensor with positioning and pressure detection functions and manufacturing method thereof
  • Flexible sensor with positioning and pressure detection functions and manufacturing method thereof
  • Flexible sensor with positioning and pressure detection functions and manufacturing method thereof

Examples

Experimental program
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Effect test

example 1

[0119] In this embodiment, a method for manufacturing a transparent flexible sensor with positioning and pressure detection functions, the method includes the following steps:

[0120] Step 1: Select a flat glass sheet with a size of 10×10cm, spin-coat a layer of release agent on the glass substrate with a thickness of about 1 μm, and put it in an oven for drying.

[0121] Step 2: spin-coat polyvinyl butyral on the substrate containing the release agent layer obtained in step 1, the solvent is N,N-dimethylformamide, the mass fraction is 10%wt, and the thickness is about 5 μm, Place in oven to dry.

[0122] Step 3: Spin-coat a layer of silver nanowire dispersion liquid on a polyethylene terephthalate film with a thickness of 100 μm, the solvent is water, and the solid content is 1 mg / L. After drying, a conductive layer is formed, and the thickness of the conductive layer is 500nm: The surface of the transparent substrate on which the silver nanowires are spin-coated for the fi...

example 2

[0133] In this embodiment, a method for manufacturing a transparent flexible sensor with positioning and pressure detection functions, the method includes the following steps:

[0134] Step 1: Select a flat glass sheet with a size of 10×10cm, spin-coat a layer of release agent on the glass substrate with a thickness of about 1 μm, and put it in an oven for drying.

[0135] Step 2: spin-coat polyvinyl butyral on the substrate containing the release agent layer obtained in step 1, the solvent is N,N-dimethylformamide, the mass fraction is 10%wt, and the thickness is about 5 μm, Place in oven to dry.

[0136] Step 3: Spin coat a layer of silver nanowire thin film on the protective layer obtained in step 2, the solvent is water, the solid content is 1mg / L, the thickness is 500nm, and put into an oven for drying.

[0137] Step 4: Laser patterning the silver nanowire conductive layer obtained in Step 3 to obtain an electrode layer. The number of pixels is 8, the pixel size is 10×1...

example 3

[0147] In this embodiment, a method for manufacturing a transparent flexible sensor with positioning and pressure detection functions, the method includes the following steps:

[0148] Step 1: Select a flat glass sheet with a size of 10×10cm, scrape and coat a layer of release agent on the glass substrate with a thickness of about 1 μm, and put it in an oven for drying.

[0149] Step 2: Scrape-coat polyvinyl butyral on the substrate containing the release agent layer obtained in step 1, the solvent is N,N-dimethylformamide, the mass fraction is 10%wt, and the thickness is about 5 μm, Place in oven to dry.

[0150] Step 3: Scrape-coat a layer of silver nanowire film on the protective layer obtained in step 2, the solvent is water, the solid content is 1mg / L, put it into an oven for drying, and the thickness is 500nm.

[0151] Step 4: Laser patterning the silver nanowire conductive layer obtained in Step 3 to obtain an electrode layer. The number of pixels is 8, the pixel size...

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Abstract

The invention discloses a flexible sensor with positioning and pressure detection functions and a manufacturing method thereof. The flexible sensor includes: a flexible substrate; electrode arrays which are located on the two sides of the transparent substrate and arranged in a planar periodic mode, a piezoelectric layer arranged on the electrode array on one side, a grounding layer arranged on the piezoelectric layer, and protective layers arranged on the grounding layer and the electrode array on the other side respectively. Periodically-arranged lead arrays connected with the electrode arrays are arranged on the surfaces of the two sides of the transparent substrate respectively, the conductive through hole arrays of the transparent substrate enable the corresponding electrodes in the electrode arrays on the two sides to achieve current conduction, the leads and the electrodes correspond to independently-addressed sensing units, and each sensing unit corresponds to one pixel point.According to the invention, positioning and pressure detection on the touch screen are carried out by using the pressure sensor, the magnitude of the finger contact force can be accurately identifiedwhile positioning is carried out, and the pressure sensor can also work normally under the condition of water staining, so that the conditional constraints on a to-be-detected target object are reduced.

Description

technical field [0001] The invention relates to touch screen technology, in particular to a flexible sensor with positioning and pressure detection functions and a manufacturing method thereof. Background technique [0002] In recent years, mobile electronic devices and flexible wearable electronic devices have developed rapidly, and touch screens used for human-computer interaction are developing in a diversified direction, resulting in growing demand for special screens such as flexible screens, folding screens, and heterosexual screens. . [0003] As a human-computer interaction input method, the touch screen can recognize external movement changes such as the position, time, and trajectory of the finger on the screen, and convert this external change into electrical signals to help people use related functions of electronic devices. Currently, in the field of mobile electronic devices, the touch screen is mainly in the form of a capacitive touch screen. After this type...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041G01L1/16
CPCG06F3/0414G01L1/16
Inventor 杨诚陈超杰戴万宇
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV