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Foldable and flexibly-deformable piezoelectric touch screen

A touch screen, piezoelectric technology, applied in electrical digital data processing, data processing input/output process, instruments, etc., can solve the problem of slow charge generation or disappearance, not discovered and excavated by technicians, piezoelectric touch screen It does not support folding and flexible deformation, and achieves the effect of low cost, convenient human-computer interaction and excellent performance

Inactive Publication Date: 2012-02-01
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The existing piezoelectric touch screen does not support folding and flexible deformation
At the same time, since the piezoelectric touch screen is a new type of human-computer interaction, the touch can accurately sense the position information of the touch point or the size of the touch force, but there are still many new functions of the piezoelectric touch screen that have not been discovered and excavated by technicians, such as: When a finger or any other contact object (both conductive and non-conductive) touches the surface of the screen or lifts it away from the surface of the screen, the charge generation and disappearance speeds on the piezoelectric ceramic surface near the contact point are different. That is, the faster the touch action, the faster the charge generation or disappearance, and the slower the touch action, the slower the charge generation or disappearance

Method used

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  • Foldable and flexibly-deformable piezoelectric touch screen
  • Foldable and flexibly-deformable piezoelectric touch screen
  • Foldable and flexibly-deformable piezoelectric touch screen

Examples

Experimental program
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Effect test

Embodiment 1

[0045] figure 1 It is the sectional view of the present embodiment, and Fig. 4 (a), Fig. 4 (b) and Fig. 4 (c) are respectively the bottom view (hidden frame), perspective view (hidden frame) and exploded view of the present embodiment (frame hidden). The piezoelectric touch screen includes a flexible substrate 2, a piezoelectric film 4, an upper electrode 3 and a lower electrode 5, wherein:

[0046] On the lower side of the square piezoelectric film 4 with a size of 54mm×54mm and a thickness of 0.1mm, there are 9 pieces of 3×3 square copper foil lower electrodes 5 distributed in a size of 10mm×10mm, with a distance of 5mm and a thickness 0.07mm; on the upper side of the piezoelectric film 4 there is a square copper foil upper electrode 3 with a size of 54mm×54mm and a thickness of 0.07mm. The upper electrode 3 is bonded to the flexible substrate 2 through an adhesive 6 .

[0047] The flexible substrate 2 is placed in the matching frame 1, the piezoelectric film is a PVDF pi...

Embodiment 2

[0051] Figure 5(a), Figure 5(b), and Figure 5(c) are the bottom view (frame hidden), perspective view (frame hidden), and exploded view (frame hidden) of Embodiment 2 of the present invention, respectively. The piezoelectric touch screen includes a flexible substrate 2, a piezoelectric film 4, an upper electrode 3 and a lower electrode 5, wherein:

[0052] On the lower side of the square piezoelectric film 4 with a size of 54mm*54mm and a thickness of 0.1mm, there are 20 rectangular copper foil lower electrodes 5 parallel to each other and distributed longitudinally. The size of the copper foil lower electrodes 5 is 54mm*2mm and the spacing is 0.5mm. , a thickness of 0.07mm; on the upper side of the piezoelectric film 4, there are 20 rectangular copper foil upper electrodes 3 parallel to each other and distributed laterally, the size of the copper foil upper electrodes 3 is 54mm*2mm, the spacing is 0.5mm, and the thickness is 0.07mm, and The edge of the copper foil upper elect...

Embodiment 3

[0055] Figure 6(a), Figure 6(b), and Figure 6(c) are the bottom view (frame hidden), perspective view (frame hidden), and exploded view (frame hidden) of this embodiment, respectively. The piezoelectric touch screen includes a flexible substrate 2 , a first piezoelectric film 4 a , a middle electrode 8 , a second piezoelectric film 4 b , an upper electrode 3 and a lower electrode 5 . The back of the flexible substrate is sequentially bonded with an upper electrode 3, a first piezoelectric film 4a, a middle electrode 8, a second piezoelectric film 4b and a lower electrode 5, wherein:

[0056] On the lower side of the square second piezoelectric film 4b with a size of 54mm*54mm and a thickness of 0.1mm, there are 20 rectangular copper foil lower electrodes 5 parallel to each other and distributed longitudinally. The size of the copper foil lower electrodes 5 is 54mm*2mm and the spacing 0.5mm, thickness 0.07mm; a rectangular copper foil middle electrode 8 with a size of 52mm*50mm...

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Abstract

The invention discloses a foldable and flexibly-deformable piezoelectric touch screen, belongs to the technical field of piezoelectric touch screens. The piezoelectric touch screen comprises a flexible substrate, a piezoelectric film, an upper electrode and a lower electrode; the flexible substrate is arranged in a matched frame, the upper electrode, the piezoelectric film and the lower electrode are adhered to the back of the flexible substrate in sequence, the upper electrode and the lower electrode divide the piezoelectric film into array type regions. On this basis, another structure is provided, namely the upper electrode, a first piezoelectric film, a middle electrode, a second piezoelectric film and the lower electrode are adhered to the back of the flexible substrate in sequence. After the piezoelectric touch screen provided by the invention is randomly deformed, twisted even folded, information such as acting force position, acting force size, acting force movement track can still be obtained. And the piezoelectric touch screen has low cost, excellent performance and high market competitiveness.

Description

technical field [0001] The invention belongs to the technical field of piezoelectric touch screens, and in particular relates to a three-dimensional piezoelectric touch screen with an arrayed piezoelectric film attached to the back. The touch screen is foldable, flexible and deformable, and can still work normally after deformation. Background technique [0002] With the development of information technology, human-computer interaction methods are not limited to traditional methods such as mouse, keyboard, and monitor. More convenient, fast, and intuitive ways are affecting people's lives, among which touch screen, as one of the most practical new human-computer interaction methods, has developed rapidly in the past 20 years. [0003] Piezoelectric materials play a vital role in mechanical sensors and drivers. This patent involves a brand new piezoelectric touch screen sensor technology. [0004] Compared with traditional capacitive and resistive touch screens, piezoelectri...

Claims

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Application Information

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IPC IPC(8): G06F3/041
Inventor 褚祥诚王林
Owner TSINGHUA UNIV
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