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touch sensor

A technology of touch sensor and sensor, which is applied in the direction of instrument, conductive layer on insulating carrier, calculation, etc., can solve the problems of touch sensor thickness increase and cost increase, and achieve the effect that the total light transmittance and haze are not easy to deteriorate

Active Publication Date: 2022-03-22
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since it is formed by laminating the capacitive sensor substrate and the piezoelectric film, there are problems such as an increase in cost due to an increase in components and an increase in the thickness of the touch sensor.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0050] figure 1 , figure 2 The illustrated touch sensor 10 of the present invention is disposed on a display surface of a display. The touch sensor 10 of the present invention has a piezoelectric sensor 11 and a capacitance sensor 12 . The piezoelectric sensor 11 detects a pressing force using a piezoelectric method. The capacitance sensor 12 detects a pressed position (X coordinate and Y coordinate) using a capacitance method. The piezoelectric sensor 11 and the capacitance sensor 12 are bonded together by a transparent filling layer 13 .

[0051] [Piezoelectric sensor]

[0052] The piezoelectric sensor 11 has: a piezoelectric film 16, which is a first laminate composed of a first base film 14 and a piezoelectric coating layer 15; and a first transparent electrode 17, which is formed on the piezoelectric film 16. one side; and a second transparent electrode 18 formed on the other side of the piezoelectric film 16 . When the touch sensor 10 is pressed, the piezoelectri...

Embodiment approach 2

[0088] exist figure 1 In the touch sensor 10 of , the orientation of the piezoelectric film 16 is arbitrary. can also be like Figure 4 The piezoelectric coating layer 15 is arranged on the upper side of the first base film 14 like the touch sensor 30 of the present invention.

[0089] Figure 4 The touch sensor 30 relative to the figure 1 The orientation of the piezoelectric film 16 is changed in the touch sensor 10 shown in FIG. 10 , but the orientation of the piezoelectric sensor 11 may also be changed. It is assumed that the second transparent electrode 18 is bonded to the transparent filling layer 13, and the second transparent electrode 18, the piezoelectric film 16, and the first transparent electrode 17 are arranged in this order from above.

Embodiment approach 3

[0091] can also be like Figure 5 Like the piezoelectric sensor 41 of the touch sensor 40 of (a), the second transparent electrode 18 is not directly formed on the piezoelectric film 16 . A fourth laminate 43 in which the second transparent electrode 18 is laminated on the fourth base film 42 is prepared, and the piezoelectric film 16 and the fourth laminate are bonded by the transparent filling layer 44 . The 4th base film 42 can be comprised with the same material as the 1st base film 14 grade|etc.,. In addition, the transparent filling layer 44 can be comprised with the same material as the other transparent filling layer 13 grade|etc.,.

[0092] The direction of the fourth laminate 43 is not limited. exist Figure 5 In the piezoelectric sensor 41 of the touch sensor 40 of (a), the second transparent electrode 18 is bonded to the transparent filling layer 44 . can also be like Figure 5 Like the piezoelectric sensor 46 of the touch sensor 45 of (b), the fourth base fil...

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Abstract

The present invention provides a touch sensor that achieves improvement in total light transmittance and haze, reduction in thickness due to reduction in components, and reduction in cost compared with conventional ones. The touch sensor (10) has a piezoelectric sensor (11) and an electrostatic capacitance sensor (12). The piezoelectric sensor (11) has a piezoelectric film (16) which is a first laminate consisting of a first base film (14) and a piezoelectric coating (15), and a layer formed on the piezoelectric film (16). A first transparent electrode (17) on one side and a second transparent electrode (18) formed on the other side of the piezoelectric film (16). The capacitance sensor (12) has a second laminate (21) in which a third transparent electrode (20) is formed on one side of a second base film (19), and a third transparent electrode (20) is formed on one side of a third base film (22). A third laminate (24) formed by adding a fourth transparent electrode (23) and a transparent filling layer (25) bonding the second laminate (21) and the third laminate (24) together.

Description

technical field [0001] The invention relates to a touch sensor with a press detection function. Background technique [0002] In recent years, touch sensors have been introduced into electronic devices such as smartphones and tablets, and are used as intuitive human-machine interfaces. The touch sensor detects a two-dimensional position touched by a finger or a pen. The electronic device is operated by detecting the touched position in cooperation with the display of the display. [0003] In addition, a touch sensor that detects a pressing force for the purpose of increasing input information and improving operability has been developed and disclosed. For example, there is a method of detecting a pressing force from a change in electrostatic capacity after deformation of the housing, a change in resistance value using pressure-sensitive rubber, and a method of detecting a change in electric charge of a piezoelectric material. Various materials such as materials using inor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/041G06F3/044
CPCG06F3/041G06F3/0445G06F3/0414G06F3/044H01B5/14
Inventor 矢野孝伸拝师基希别府浩史木曽宪俊梨木智刚
Owner NITTO DENKO CORP
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