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Piezoelectric sheet, touch panel, and input/output device

An input-output, piezoelectric sheet technology, applied in the field of piezoelectric sheets, which can solve the problems of difficult and large-area sheet processing, material hardness and flexibility, and processability.

Active Publication Date: 2020-10-16
TIANMA MICRO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ceramics have disadvantages such as poor flexibility and processability due to the hardness of the material, and difficulty in handling large-area sheets

Method used

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  • Piezoelectric sheet, touch panel, and input/output device
  • Piezoelectric sheet, touch panel, and input/output device
  • Piezoelectric sheet, touch panel, and input/output device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0127]As a second embodiment of the present invention, a modified example of the first embodiment will be described. In this embodiment, another example of a detection system of a touch position and a touch pressure is described.

[0128] An example of time-division detection was shown above, but an example of another system without time division will be described here. Figure 7 represents a perspective view of a system detected without segmentation by time, Figure 8 is the timing diagram. An AC voltage is applied to the first conductor layer 112 . On the other hand, the second conductor layer 122 is designed such that an AC voltage is applied from one end of the conductor layer (for example, the wiring connection 2201 for the second conductor layer), and an AC voltage is applied at the other end (for example, the wiring connection 2202 for the second conductor layer). ) detection voltage. With this configuration, it is possible to detect a touch position and a touch pre...

no. 3 approach

[0132] Refer to the perspective view of this embodiment Figure 9 , the embodiment of the present invention is configured to include a piezoelectric layer 602, a first conductor layer 612 disposed on one surface of the piezoelectric layer 602, and a second conductor disposed on the other surface of the piezoelectric layer 602. layer 622 , and an insulator layer 642 arranged on the surface of the first conductor layer 612 opposite to the surface of the piezoelectric layer 602 .

[0133] The piezoelectric layer 602 is preferably a transparent piezoelectric sheet that is transparent in the visible light region. In addition, depending on the application used, it may be a piezoelectric sheet having transparent properties not only in the visible light region but also in the wavelength region corresponding to the application.

[0134] In this embodiment, the first conductor layer 612 is designed to detect not only the in-plane touch position but also the touch pressure. exist Fig...

Embodiment 1

[0182] Examples according to the first embodiment of the present invention are shown below.

[0183] This embodiment is designed to use a PVDF film as the piezoelectric layer 102 . The thickness of the PVDF membrane is assumed to be 50 μm. Piezoelectricity is provided by coaxial stretching after extrusion molding to form a film, and then by preparing metal electrodes on the outside and applying a high voltage to perform polarization treatment (polarization process). Although piezoelectric treatment is performed after film formation, polarization treatment may be performed during mechanical processes such as stretching.

[0184] Using ITO (indium-tin oxide), transparent electrode films were formed to a thickness of 50 nm by a sputtering technique on both surfaces of the polarized PVDF film. At this time, since the vapor deposition conditions of the transparent electrode film are constituted by the target species, oxygen pressure, and vapor deposition temperature, the sheet re...

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PUM

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Abstract

The present invention relates to a piezoelectric sheet, a touch panel, and an input and output device. It provides a piezoelectric sheet, which includes: a piezoelectric layer; and a first conductive layer. The first conductive layer is arranged on the piezoelectric layer. on one surface of the piezoelectric layer; a second conductor layer disposed on the other surface of the piezoelectric layer; and an insulator layer disposed on the first conductor layer A surface opposite to the surface on which the piezoelectric layer is located, wherein the piezoelectric sheet is configured to detect a touch position in the first conductor layer and detect a touch pressure in the second conductor layer .

Description

technical field [0001] The present invention relates to piezoelectric sheets. In particular, the present invention relates to a piezoelectric sheet capable of touch position detection and touch pressure detection. In addition, the present invention relates to an input / output device using these piezoelectric sheets or touch panels. Background technique [0002] A display and input / output device provided with or combined with a touch panel (also referred to as a touch panel) as an input device is widely put into practical use as a display device, such as a liquid crystal display. In particular, in portable devices such as mobile phones, the use of display and input devices is becoming mainstream. The display and input device having the touch screen enables the user to intuitively operate the device by pressing the display content on the screen of the display device by the user. [0003] Although there are various systems in touch screens, capacitive systems have gradually i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/044
CPCG06F3/016G06F3/0418G06F3/044G06F2203/04106G06F3/04184G06F3/0445G06F3/0443G06F3/04182G06F3/043G09G3/3696
Inventor 高取宪一
Owner TIANMA MICRO ELECTRONICS CO LTD
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