TWM530433U - Three-dimensional touch screen assembly - Google Patents

Abstract

The present invention discloses a three-dimensional touch screen assembly. The three-dimensional touch screen assembly includes a complex touch-sensing and pressure-sensing layer. The complex touch-sensing and pressure-sensing layer includes a flexible substrate layer, a first touch-sensing and pressure-sensing layer, and a second touch-sensing and pressure-sensing layer. The first and second touch-sensing and pressure-sensing layers are disposed at different sides of the flexible substrate layer. Touch-sensing and pressure-sensing electrodes arranged in a first direction are disposed on the first touch-sensing and pressure-sensing layer. Touch-sensing and pressure-sensing electrodes arranged in a second direction are disposed on the second touch-sensing and pressure-sensing layer.

Description

3D touch assembly

The present invention relates to the field of touch and pressure sensing, and in particular to a three-dimensional touch assembly.

With the development of technology, touch screen assembly has been widely used in a variety of consumer electronic devices, such as smart phones, tablets, cameras, e-books, MP3 players and other portable electronic products, or applications. The display screen of the operation control device.

Most of the existing electronic devices use a capacitive touch assembly, and the capacitive touch assembly utilizes current sensing of the human body to operate. A two-dimensional coordinate system (X, Y) is established on the surface of the touch surface. The general capacitive touch assembly is provided with X-direction and Y-direction touch electrodes in the plane, and the finger touches the touch electrode. On the touch surface, the finger changes the electrical signal at the touch point due to the human body electric field. The electronic device internally calculates the coordinate position of the touch point in the X direction and the Y direction by accurately calculating the electrical signal change at the touch point, that is, determining the two-dimensional position of the touch point and controlling the display and jump operations of the electronic device. .

In order to further expand the function of the touch assembly, some touch sensors are currently equipped with independent pressure sensors, and the pressure sensor includes a plurality of The pressure sensing unit, the pressure sensing unit located at the touch point, induces a certain deformation caused by the pressing force perpendicular to the touch surface (corresponding to the Z-axis direction), thereby causing a change in the electrical signal of the pressure sensing unit, and the electrical property is changed. The detection of the number can determine the pressure experienced by the pressure sensing unit. Through the detection of the pressure value, the function of the device matching different pressure values can be designed. For example, the same touch point can match multiple functions under different strengths. That is, we can expand the design from the three-dimensional angle defined by the touch point (X, Y) and pressure (Z).

However, the aforementioned electronic device with pressure detection function increases the overall thickness due to the loading of the pressure sensor, the circuit is complicated, and the process is complicated; therefore, how to develop a simple three-dimensional touch with touch and pressure detection The control detection function module solution is required by the industry.

The novel content is intended to provide a simplified summary of the disclosure in order to provide a basic understanding of the disclosure. This Summary is not an extensive overview of the disclosure, and is not intended to identify key/critical elements of the novel embodiments or the scope of the invention.

One of the contents of the present invention is to provide a three-dimensional touch assembly, thereby overcoming the problem that the thickness of the current three-dimensional touch assembly is increased and the line is complicated.

In order to achieve the above object, a technical aspect of the present invention relates to a three-dimensional touch assembly, comprising a composite touch pressure sensing layer, the composite touch pressure sensing layer comprising a flexible substrate layer and respectively disposed at the same a first touch pressure sensing layer and a second touch pressure sensing layer on both sides of the flexible substrate layer, the first touch pressure sense A plurality of first-direction touch piezoelectric electrodes are disposed on the layer, and a plurality of second-direction touch piezoelectric electrodes are disposed on the second touch pressure sensing layer.

Preferably, the first touch pressure sensitive layer is complementary to the second touch pressure sensitive layer.

Preferably, the first touch pressure sensitive layer and the second touch pressure sensitive layer are a first nano silver wire PVDF piezoelectric layer and a second nano silver wire PVDF piezoelectric layer, respectively.

Preferably, the first nano silver wire PVDF piezoelectric layer and the second nano silver wire PVDF piezoelectric layer respectively comprise a plurality of first direction nano silver wire PVDF piezoelectric electrodes and a plurality of second direction nano silver wires PVDF Piezoelectric electrode.

Preferably, the plurality of first direction nano silver wire PVDF piezoelectric electrodes and the plurality of second direction nano silver wire PVDF piezoelectric electrodes have a shape of a series of diamonds, a series of triangles, a series of circles, rectangles, or One or more of the wavy shapes.

Preferably, the plurality of first direction nano silver wire PVDF piezoelectric electrodes and the plurality of second direction nano silver wire PVDF piezoelectric electrodes are internally dispersed with a plurality of nano silver wires, and the plurality of nano silver wires are interposed Join each other to form a conductive network.

Preferably, each of the first direction nano silver wire PVDF piezoelectric electrodes and each of the second direction nano silver wire PVDF piezoelectric electrodes are provided with conductive lines at both ends, and the conductive lines are directly connected to one integrated A three-dimensional signal processing circuit on a wafer or connected to the three-dimensional signal processing circuit via a flexible circuit board.

Preferably, the nano silver wire has a lateral dimension of 10 to 450 nm and a longitudinal dimension of 10 to 300 um.

Preferably, the flexible substrate layer has a thickness of 100 to 200 μm .

Preferably, the first touch pressure sensitive layer and the second touch pressure sensitive layer have a thickness of about 10 nm to 5 μm .

Therefore, according to the technical content of the present invention, the present invention provides at least the following advantages by providing a three-dimensional touch assembly, which has at least the following advantages compared with the prior art:

1. The first nano silver wire PVDF piezoelectric layer and the second nano silver wire PVDF piezoelectric layer are made of nano silver wire PVDF piezoelectric film, which simultaneously has touch signal detection and pressure signal detection function. Therefore, the thickness of the three-dimensional touch control assembly can be greatly reduced, and the touch signal and the pressure signal are sent out by the same set of conductive lines, which can reduce the arrangement of the lines and avoid the complicated lines of the traditional three-dimensional touch assembly. problem. Since the nano-silver wire PVDF piezoelectric film is dispersed and embedded in the nano-silver wire, the nano-silver wire forms a conductive network inside, so the conductivity is very good, and the nano-silver PVDF piezoelectric film itself has a good pressure. The electrical characteristics, therefore, the first direction nano silver wire PVDF piezoelectric electrode and the second direction nano silver wire PVDF piezoelectric electrode are made of nano silver wire PVDF piezoelectric film, the detection effect of the touch signal and the pressure signal are very ideal.

2. The composite touch pressure sensing layer structure of the utility model has a first nano silver wire PVDF piezoelectric layer and a second nano silver wire PVDF piezoelectric layer disposed on both sides of the flexible substrate layer, and the flexible substrate layer can be arranged. The composite touch pressure sensing layer can sensitively respond to the touch operation to generate a certain deformation to improve the pressure signal detection sensitivity of the three-dimensional touch assembly.

The basic spirit and other novel objects of the present invention, as well as the technical means and implementations of the present invention, can be readily understood by those of ordinary skill in the art.

10‧‧‧3D touch assembly

10s‧‧‧Composite touch pressure layer

11‧‧‧Upper substrate

12‧‧‧Fitting layer

15, 15a‧‧‧First touch pressure layer

151, 151a‧‧‧ first direction touch piezoelectric electrode

16, 16a‧‧‧Flexible substrate layer

17, 17a‧‧‧Second touch pressure layer

171, 171a‧‧‧second direction touch piezoelectric electrode

18‧‧‧Three-dimensional signal processing circuit

800‧‧‧Piezoelectric film

801‧‧‧ nano silver wire

The above and other objects, features, advantages and embodiments of the present invention can be more clearly understood. The description of the drawings is as follows: FIG. 1 is a schematic diagram showing the layered structure of the three-dimensional touch assembly of the first embodiment of the present invention. .

2 is a schematic plan view showing the first nano-silver line PVDF piezoelectric layer of the three-dimensional touch assembly of the first embodiment of the present invention.

FIG. 3 is a plan view showing the planar structure of the composite touch pressure sensing layer of the three-dimensional touch assembly of the first embodiment of the present invention.

Fig. 4 is a schematic plan view showing the structure of a nano-silver wire PVDF piezoelectric film.

FIG. 5 is a timing diagram of touch signal and pressure signal detection of the 3D touch assembly of the first embodiment of the present invention.

FIG. 6 is a plan view showing the planar structure of the first nano-silver line PVDF piezoelectric layer of the three-dimensional touch assembly of the second embodiment of the present invention.

FIG. 7 is a plan view showing the planar structure of the composite touch pressure sensing layer of the three-dimensional touch assembly of the second embodiment of the present invention.

The various features and elements in the figures are not drawn to scale, and are in the In addition, similar elements/components are referred to by the same or similar element symbols throughout the different drawings.

In order to make the description of the present disclosure more detailed and complete, the following description of the embodiments of the present invention and the specific embodiments thereof are set forth. The features of various specific embodiments, as well as the method steps and sequences thereof, are constructed and manipulated in the embodiments. However, other specific embodiments may be utilized to achieve the same or equivalent function and sequence of steps.

Unless otherwise defined in the specification, the meaning of the scientific and technical terms used herein is the same as that of ordinary skill in the art. In addition, the singular noun used in this specification covers the plural of the noun in the case of no conflict with the context; the plural noun of the noun is also included in the plural noun used.

Referring to FIG. 1 , the 3D touch control assembly 10 of the first embodiment of the present invention includes a top-to-bottom position. In the present invention, position words such as up, down, left, right, top, bottom, etc. are only used to define relative positions on a specified view, and The non-absolute position includes an upper substrate 11 , a bonding layer 12 , a composite touch sensing layer 10 s and a three-dimensional signal processing circuit 18 . The composite touch sensing layer 10 s has both touch signal detection and The pressure signal detects these two functions, the touch signal is used to determine the touch position of the touch operator, and the pressure signal is used to determine the pressing force value of the touch operation. The three-dimensional signal processing circuit 18 is disposed below the composite pressure sensitive layer 10s, and its position is not limited. The composite touch sensing layer 10s is electrically connected to the three-dimensional signal processing circuit 18, and the three-dimensional signal processing circuit 18 can calculate the pressing position of the touch position and the corresponding position through the signal processing technique.

The upper substrate 11 can be regarded as a touch cover of the electronic device. The so-called cover plate includes a touch operation surface and a component mounting surface, and the touch operation surface is used for a touch operation by a finger or a stylus, and the component mounting surface It is used to mount touch electrode components or display modules. The material of the upper substrate 111 may be PEEK (polyetheretherketone), PI (Polyimide, polyethylene terephthalate), PET (polyethylene terephthalate), PC (polycarbonate polycarbonate). , PES (polyethylene glycol succinate), PMMA (polymethylmethacrylate), and any combination of the two, but not limited to, can use soft glass or thin glass Cover plate.

The bonding layer 12 may be OCA (Optical Clear Adhesive) or LOCA (Liquid Optical Clear Adhesive).

Referring to FIG. 1 to FIG. 3 together, the composite touch pressure sensitive layer 10s includes a flexible substrate layer 16 and a first touch pressure sensing layer 15 and a first layer respectively disposed on opposite sides of the flexible substrate layer 16. In the second touch pressure sensing layer 17 , the first touch pressure sensitive layer 15 and the second touch pressure sensitive layer 17 are opposite sides of the flexible substrate layer 16 as bearing surfaces. The first touch pressure sensing layer 15 is provided with a plurality of first direction touch piezoelectric electrodes 151, and the second touch pressure sensing layer 17 is provided with a plurality of second direction touch piezoelectric electrodes 171, a plurality of first The direction touch piezoelectric electrode 151 and the second direction touch piezoelectric electrode 171 detect both the touch signal and the pressure signal and the two are complementarily arranged.

Specifically, in the preferred embodiment of the present invention, the first touch pressure sensitive layer 15 and the second touch pressure sensitive layer 17 are a first nano silver wire PVDF piezoelectric layer 15 and a second nano silver wire PVDF, respectively. Piezoelectric layer 17. The first nano silver wire PVDF piezoelectric layer 15 and the second nano silver wire PVDF piezoelectric layer 17 respectively comprise a plurality of first direction nano silver wire PVDF piezoelectric electrodes 151 and a plurality of second direction nano silver wire PVDF piezoelectric electrodes 171 .

In the touch detection mode, the first nano silver line PVDF piezoelectric layer 15 and the second nano silver line PVDF piezoelectric layer 17 cooperate to touch the touch operation of the operator on the upper substrate 11 in a mutual capacitance manner. Controlling signal detection to determine a position corresponding to the touch operation; in the pressure detection mode, each of the first direction nano silver wire PVDF piezoelectric electrodes 151 and each of the second direction nano silver wire PVDF piezoelectric electrodes 171 are The self-capacitance detection methods respectively detect the pressing force values under the touch operation.

Referring to FIG. 2 and FIG. 3, in the preferred embodiment of the present invention, the first nano-silver-line PVDF piezoelectric layer 15 includes a plurality of first directions arranged in parallel in a first direction (X direction). a nano silver wire PVDF piezoelectric electrode 151, the second nano silver wire PVDF piezoelectric layer 17 includes a plurality of second direction nano silver wire PVDF piezoelectric electrodes 171 arranged in parallel in the second direction (Y direction), X The direction is orthogonal to the Y direction, that is, the plurality of first direction nano silver line PVDF piezoelectric electrodes 151 arranged in parallel with each other are orthogonal to the plurality of second direction nano silver line PVDF piezoelectric electrodes 171 arranged in parallel with each other.

Each of the first direction nano-silver-line PVDF piezoelectric electrodes 151 on the first nano-silver-line PVDF piezoelectric layer 15 can be connected to the three-dimensional signal processing circuit 18 through two conductive lines to form a closed electrical loop, for each first Direction nano silver wire The PVDF piezoelectric electrode 151 performs self-capacitance pressure sensing, and the plurality of conductive lines on the first nano-silver-line PVDF piezoelectric layer 15 can be selectively transmitted through the corresponding flexible circuit board (not shown) of the layer. The flexible circuit board is electrically connected to the three-dimensional signal processing circuit 18; similarly, each of the second nano-silver-line PVDF piezoelectric electrodes 171 of the second nano-silver-line PVDF piezoelectric layer 17 can also form a closed electrical property. The loop is self-contained by the capacitive sensing, and selectively uses a flexible circuit board to perform signal transmission through a corresponding flexible circuit board (not shown) of the layer, and the flexible circuit board is electrically connected to the three-dimensional signal processing circuit 18. The conductive lines at each of the first direction nano silver line PVDF piezoelectric electrodes 151 and each of the second direction nano silver line PVDF piezoelectric electrodes 171 have the functions of transmitting touch signals and pressure signals.

When the touch operator performs a touch operation on the upper surface of the upper substrate 11, a first direction nano silver wire PVDF piezoelectric electrode 151 or a second direction nano silver wire PVDF piezoelectric electrode 171 corresponding to the touch point, or A first direction nanosilver PVDF piezoelectric electrode 151 and a second direction nanosilver PVDF piezoelectric electrode 171 will be simultaneously subjected to pressure.

The first direction nano silver wire PVDF piezoelectric electrode 151 and/or the second direction nano silver wire PVDF piezoelectric electrode 171 are preferably electrically conductive, and the optimum surface resistance is less than 200 ohms/cm 2 . The first direction nano silver wire PVDF piezoelectric electrode 151 and the second direction nano silver wire PVDF piezoelectric electrode 171 are strain reactions such as deformation, deflection or shear caused by pressure generated under a touch operation, thereby causing at least one Piezoelectric material with altered electrical properties.

In the second and third figures, only four first-direction nano-silver-line PVDF piezoelectric electrodes 151 and four second-direction nano-silver-line PVDF piezoelectric electrodes 171 are taken as an example for illustration. In fact, the number is not limited. . The first The orientation of the nano-silver-line PVDF piezoelectric electrode 151 and the second-direction nano-silver-line PVDF piezoelectric electrode 171 are complementary, and the superposition effect of the front surface of the upper substrate 11 is equivalent to realizing the touch pressure with a single layer of material. The configuration of the sensing electrode (including the first direction nano silver wire PVDF piezoelectric electrode 151 and the second direction nano silver wire PVDF piezoelectric electrode 171). In the present embodiment, the X direction is orthogonal to the Y direction, but the angle between the X and Y directions is not limited.

In the second and third figures, only the first-direction nano-silver-line PVDF piezoelectric electrode 151 and the second-direction nano-silver-line PVDF piezoelectric electrode 171 in series are described as an example. Actually, the shape can be It is a series of triangles, a series of circles, a rectangle, a wave shape, and the like, which are not limited.

Referring to FIG. 4, the first nano silver wire PVDF piezoelectric layer 15 and the second nano silver wire PVDF piezoelectric layer 17 are patterned by using a nano silver wire PVDF (Polyvinylidene Fluoride) piezoelectric film 800. The result is (the patterning result can be as shown in FIG. 2 and FIG. 6 ), that is, the nano silver wire PVDF piezoelectric film 800 is made of a PVDF material, and the PVDF material is doped with a plurality of nano silver wires. 801. A plurality of nano silver wires 801 are interspersed and embedded in the nano silver wire PVDF piezoelectric film 800 and overlap each other to form a conductive network to improve the conductivity of the nano silver wire PVDF piezoelectric film 800. The so-called silver nano wires (SNW) refers to a form of silver having a lateral dimension of 10 to 450 nm and a longitudinal dimension of 10 to 300 um. Silver is a silver-white metal in a normal state, and is an opaque material, and has excellent electrical conductivity.

The first nano silver wire PVDF piezoelectric layer 15 and the second nano silver wire PVDF piezoelectric layer 17 have a thickness of about 10 nm to 5 μm , preferably 20 nm to 1 μm , more preferably in the size of the touch pressure sensitive layer. 20nm-100nm. Preferably, the light transmittance is 90% or more.

The flexible substrate layer 16 is a flexible material, preferably less than 500 μm thick, more preferably less than 200 μm thick, and most preferably 100-200 μm . Within this preferred range, the flexible substrate layer 16 can be used as a better carrier layer, with better flexibility and good strain capacity. The material of the flexible substrate layer 16 may be a polymer film such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polymethyl methacrylate. (PMMA) or a film of polycarbonate, a thin glass sheet (for example, 100 μm thick or thinner) or a soda lime glass. Further preferably, it is a transparent flexible material, and the light transmittance is 80% or more (preferably, the light transmittance is 90% or more).

In the present invention, the three-dimensional signal processing circuit 18 is integrated on a chip for processing at least touch signals and pressure signals (ie, mutual capacitance signals and self-capacitance signals). In order to clearly illustrate the timing of detecting the touch signal and the pressure signal, please refer to FIG. 5, and It1 and It2 respectively represent two different touch pressure electrodes in sequence (for example, two first direction nano silver wires). The PVDF piezoelectric electrode 151) detects the timing of the touch signal, and the Ifa_1 and Ifa_2 represent two different first-direction nano-silver-line PVDF piezoelectric electrodes on the sequentially adjacent two nano-silver-line PVDF piezoelectric layers 15. The pressure signal detection timing of 151, Ifb_1 and Ifb_2 represent the pressure signal detection timing of two different second nano silver wire PVDF piezoelectric electrodes 171 on the two adjacent second nano silver wire PVDF piezoelectric layers 17. Since the first direction nano silver wire PVDF piezoelectric electrode 151 and the second direction nano silver wire PVDF piezoelectric electrode 171 have both a touch signal and a pressure signal detection function, the touch signal and the pressure signal are detected and time-series. Conduct, ie touch signal and pressure The signal detection periods are performed separately from each other, and the manner of performing the separation includes at least two types:

1. The touch signal and the pressure signal detection are performed independently; that is, the signal processing circuit 18 scans the first direction nano silver wire PVDF piezoelectric electrode 151 and the second direction nano silver wire PVDF piezoelectric electrode 171 one by one in separate time periods. The touch signal and the pressure signal are separately detected. The detection of the touch signal and the pressure signal are performed independently of each other in time series.

Secondly, the touch signal is first detected to determine the position of the touch point, and then the pressure signal is detected to determine the pressing force value; the three-dimensional signal processing circuit 18 scans the first direction nano silver wire PVDF piezoelectric electrode 151 and the second direction nanometer one by one The silver line PVDF piezoelectric electrode 171 determines the position of the touch point by preferentially detecting the touch signal and processing the touch signal, and the first direction nano silver line PVDF piezoelectric electrode 151 corresponding to the position of the touch point and/or The second direction nano silver wire PVDF piezoelectric electrode 171 is surely subjected to a pressure signal generated by the pressing force. Since the position of the touch point has been determined, the three-dimensional signal processing circuit 18 immediately follows the first direction of the touch point at the position of the nano silver line PVDF. The piezoelectric electrode 151 and the second-direction nano-silver line PVDF piezoelectric electrode 171 can detect the pressure signal. This saves the execution time of the program and obtains the position of the touch point and the pressure value at the fastest speed.

The three-dimensional touch control assembly 10 detects the touch signal by mutual capacitance, and the pressure signal is detected by self-capacitance. The mutual-capacitance detection of the touch signal is specifically: the touch unit is in the first direction. The nano silver wire PVDF piezoelectric electrode 151 and the second direction nano silver wire PVDF piezoelectric electrode 171 are defined, and have a capacitance effect, that is, a first direction nano silver wire PVDF piezoelectric electrode 151 and a second direction nano silver wire PVDF piezoelectric A capacitance is formed between the electrodes 171, the first direction The nano silver wire PVDF piezoelectric electrode 151 is equivalent to the upper plate of the capacitor, and the second direction nano silver wire PVDF piezoelectric electrode 171 is equivalent to the lower plate of the capacitor, when the user's finger or stylus pen is on the upper substrate 11 When the touch operation is performed, the coupling between the upper and lower plates of the corresponding touch unit at the touch point is affected, thereby changing the capacitance between the two plates.

When the pressure signal is detected, the change in the capacitance forms a touch signal to the three-dimensional signal processing circuit 18. The self-capacitance mode detecting the pressure signal is specifically: each of the first direction nano silver wire PVDF piezoelectric electrode 151 and the second direction nano silver wire PVDF piezoelectric electrode 171 are provided with conductive lines at both ends, and the two conductive lines and The three-dimensional signal processing circuit 18 and the first direction nano silver wire PVDF piezoelectric electrode 151 or the second direction nano silver wire PVDF piezoelectric electrode 171 form a closed loop to detect a pressure signal.

In the pressure signal detection, the first nano silver line PVDF piezoelectric layer 15 and the second nano silver line PVDF piezoelectric layer 17 are independent of each other, but the three-dimensional signal processing circuit 18 pairs the first nano silver line PVDF piezoelectric layer 15 And the processing method of the pressure signal detected by the second nano silver wire PVDF piezoelectric layer 17 can reflect the beneficial effect of the pressure signal superposition.

It can be seen from the above-mentioned embodiments that the three-dimensional touch assembly 10 disclosed in the present invention has at least the following advantages compared with the prior art:

1. The first nano silver wire PVDF piezoelectric layer 15 and the second nano silver wire PVDF piezoelectric layer 17 are made of nano silver wire PVDF piezoelectric film 800, which simultaneously has touch signal detection and pressure signal. The detection function can greatly reduce the thickness of the touch-sensitive assembly 10 with piezoelectric detection, and the touch signal and the pressure signal are remitted by the same set of conductive lines, which can reduce the arrangement of the lines and avoid It avoids the complicated circuit of the traditional 3D touch assembly. Since the nano silver wire is embedded and embedded in the nano silver wire 800, the nano silver wire forms a conductive network inside, so the conductivity is very good, and the nano silver wire PVDF piezoelectric film 800 itself has better. The piezoelectric characteristics, so the first direction nano silver wire PVDF piezoelectric electrode 151 and the second direction nano silver wire PVDF piezoelectric electrode 171 are made of nano silver wire PVDF piezoelectric film 800, the detection of touch signals and pressure signals The results are very good.

2. The composite touch pressure sensitive layer 10s of the present invention has a first nano silver wire PVDF piezoelectric layer 15 and a second nano silver wire PVDF piezoelectric layer 17 disposed on both sides of the flexible substrate layer 16, and a flexible substrate layer. The setting of 16 can make the composite touch pressure sensing layer 10s sensitively respond to the touch operation to generate a certain deformation to improve the pressure signal detection sensitivity of the touch detection assembly 10 with piezoelectric detection.

3. The utility model adopts the mutual capacitance detection method to detect the touch signal, and uses the self-capacitance method to detect the pressure signal, and the two respond to the touch signal and the pressure signal change generated by the touch operation. Both are changes in capacitance, that is, the signal types of the two are consistent due to touch operations. Due to the consistency of the signal types of the two, the signal processing can be realized by the same processing circuit. In the present invention, a set of hardware devices (the three-dimensional signal processing circuit 18 integrated on a chip) can be used. Realize the processing of touch signals and pressure signals. Manufacturers do not need to design two separate hardware devices to handle pressure signals and touch signals. This improves the integration of the capacitive 3D detection module 10 and reduces the cost of the hardware device. The hardware complexity and high cost caused by the multiple sets of hardware devices existing in the existing touch detection assembly with piezoelectric detection are avoided.

4. The touch assembly with piezoelectric detection has 10 points to detect the position of the touch point and the pressing force value. Preferably, the touch detection assembly 10 with piezoelectric detection first detects the position of the touch point, and then detects the pressing force value of the touch pressure sensitive electrode corresponding to the touch point position, at the pressing force During the detection of the value, the signal processing circuit 18 does not need to detect the touch sensitive electrodes one by one, thereby improving the detection efficiency and reducing the hardware loss.

Referring to FIG. 6 and FIG. 7 , the second embodiment of the present invention has a piezoelectric detecting touch assembly (not labeled) which is different from the first embodiment only in that the composite touch pressure is sensed. The layer 10a includes a flexible substrate layer 16a, and a first nano-silver-line PVDF piezoelectric layer 15a and a second nano-silver-line PVDF piezoelectric layer 17a are disposed on opposite sides of the flexible substrate layer 16a. The first nano silver wire PVDF piezoelectric layer 15a and the second nano silver wire PVDF piezoelectric layer 17a are respectively provided with a plurality of first direction nano silver wire PVDF pressures arranged in parallel in the first direction (X direction) at equal intervals. The electric electrode 151a and the plurality of second direction nano silver wire PVDF piezoelectric electrodes 171a arranged in parallel in the second direction (Y direction), the first direction nano silver wire PVDF piezoelectric electrode 151a and the second direction nano silver The line PVDF piezoelectric electrode 171a has a rectangular strip shape.

The specific embodiments of the present invention are disclosed in the above embodiments, and are not intended to limit the present invention. Those of ordinary skill in the art to which the present invention pertains, without departing from the spirit and scope of the present invention, Various changes and modifications may be made thereto, and the scope of protection of the present invention is defined by the scope of the accompanying claims.

10‧‧‧3D touch assembly

10s‧‧‧Composite touch pressure layer

11‧‧‧Upper substrate

12‧‧‧Fitting layer

15‧‧‧First touch pressure sensitive layer

16‧‧‧Flexible substrate layer

17‧‧‧Second touch pressure layer

18‧‧‧Three-dimensional signal processing circuit

Claims (10)

A three-dimensional touch assembly includes: a composite touch pressure sensing layer comprising: a flexible substrate layer; a first touch pressure sensing layer, wherein the first touch pressure sensing layer is provided with a plurality of first direction touches And controlling a piezoelectric electrode; and a second touch pressure sensing layer, wherein the second touch pressure sensing layer is provided with a plurality of second direction touch piezoelectric electrodes, wherein the first touch pressure sensing layer and the second touch The pressure sensing layers are respectively disposed on both sides of the flexible substrate layer. The three-dimensional touch sensor assembly of claim 1, wherein the first touch pressure sensitive layer is complementary to the second touch pressure sensitive layer. The three-dimensional touch sensor assembly of claim 1, wherein the first touch pressure sensitive layer and the second touch pressure sensitive layer are a first nano silver wire PVDF piezoelectric layer and a second nano silver wire PVDF piezoelectric layer. The three-dimensional touch-sensitive assembly of claim 3, wherein the first nano-silver-line PVDF piezoelectric layer and the second nano-silver-line PVDF piezoelectric layer respectively comprise a plurality of first-direction nano-silver-line PVDF piezoelectric electrodes and A plurality of second direction nano silver wire PVDF piezoelectric electrodes. The three-dimensional touch assembly of claim 4, wherein the first direction nano silver wire PVDF piezoelectric electrodes and the second direction nano silver wires The shape of the PVDF piezoelectric electrode is one or more of a series of diamonds, a series of triangles, a series of circles, rectangles, or waves. The three-dimensional touch assembly of claim 4, wherein the first direction nano silver wire PVDF piezoelectric electrodes and the second direction nano silver wire PVDF piezoelectric electrodes are internally dispersed with a plurality of nano silver wires, The nano silver wires overlap each other to form a conductive network. The three-dimensional touch assembly of claim 4, wherein each of the first direction nano silver wire PVDF piezoelectric electrodes and the second direction nano silver wire PVDF piezoelectric electrodes are disposed at each end A conductive line directly connected to a three-dimensional signal processing circuit integrated on a wafer or connected to the three-dimensional signal processing circuit via a flexible circuit board. The three-dimensional touch assembly of claim 6, wherein the nano silver wire has a lateral dimension of 10 to 450 nm and a longitudinal dimension of 10 to 300 um. The three-dimensional touch assembly of claim 1, wherein the flexible substrate layer has a thickness of 100 to 200 μm. The three-dimensional touch sensor assembly of claim 1, wherein the first touch pressure sensitive layer and the second touch pressure sensitive layer have a thickness of about 10 nm to 5 μm.