JP2022022046A - Three-dimensional detection panel and method for producing the same, and electronic apparatus - Google Patents

Abstract

To provide a three-dimensional detection panel and a method for producing the same, and an electronic apparatus.SOLUTION: In an electronic apparatus 100, a three-dimensional detection panel includes a cover plate 110, a two-dimensional touch detection module 140, a pressure detection coating layer 160, and an optically-transparent electrode layer 170. The cover plate defines a touch region 111 and a peripheral region 112 surrounding the touch region thereon. The two-dimensional touch detection module is disposed on the touch region. The pressure detection coating layer coats the remote side of the two-dimensional touch detection module from the cover plate. The optically-transparent electrode layer coats the remote side of the pressure detection coating layer from the two-dimensional touch detection module.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a three-dimensional detection panel, a method for manufacturing the same, and an electronic device.

Due to the diverse development of touch modules, touch modules have matured and applied to industrial electronics and consumer electronics products. By determining the two-dimensional position of the touch point on the screen surface (eg, X-axis and Y-axis), the force parameter (eg, Z-axis) caused by the change in force applied to the screen surface is detected. By then, the demand has advanced. The application requirements for flexible panels are also unavoidable.

However, in a conventional 3D touch-pressure integrated panel, pressure sensors are usually mounted above and below the 2D touch panel. Not only is this manufacturing method incompatible with conventional manufacturing processes, it also requires the use of additional adhesives (optically transparent adhesives (OCA)). In addition, in the design of this type of outsell touch-pressure integrated panel, in addition to the cover plate, an additional transparent film is required to protect the pressure sensor. Therefore, an additional manufacturing process is required and additional costs are incurred.

U.S. Pat. No. 9,874773

Therefore, how to provide a three-dimensional detection panel for solving the above problems has become an important issue for the industry.

An object of the present disclosure is to provide a three-dimensional detection panel capable of efficiently solving the above problems.

According to one embodiment of the present disclosure, the three-dimensional detection panel includes a cover plate, a two-dimensional touch detection module, a pressure detection coating layer, and a light transmissive electrode layer. The cover plate defines a touch area and a peripheral area surrounding the touch area on it. The two-dimensional touch detection module is located in the touch area. The pressure detection coating layer is coated on the side away from the cover plate of the 2D touch detection module. The light-transmitting electrode layer is coated on the side of the pressure detection coating layer away from the two-dimensional touch detection module.

In one embodiment of the present disclosure, the material of the pressure sensing coating layer comprises polyvinylidene fluoride (PVDF).

In one embodiment of the present disclosure, the thickness of the pressure sensing coating layer ranges from about 7 μm to about 10 μm.

In one embodiment of the present disclosure, the two-dimensional touch detection module is an OGS-SITO (one glass solution single-sided indium tin oxide) type touch module.

In one embodiment of the present disclosure, the light transmissive electrode layer is a silver nanowire electrode layer.

In one embodiment of the present disclosure, the value of the L * axis in the CIELAB color space of the three-dimensional detection panel is 92 or more.

In one embodiment of the present disclosure, the value of the a * axis in the CIELAB color space of the 3D detection panel is in the range of about −1.5 to about 1.5.

In one embodiment of the present disclosure, the value of the b * axis in the CIELAB color space of the 3D detection panel is in the range of about -2 to about 2.

In one embodiment of the present disclosure, the pressure sensing coating layer comprises a plurality of pressure sensing blocks. The pressure detection blocks are separated from each other.

In one embodiment of the present disclosure, the light transmissive electrode layer comprises a plurality of electrode blocks. The electrode blocks are spaced apart from each other and come into contact with each other.

According to one embodiment of the present disclosure, the electronic device comprises the three-dimensional detection panel and a display module. The display module is arranged on the light transmitting electrode layer side away from the pressure detection coating layer.

According to one embodiment of the present disclosure, the method of manufacturing a 3D detection panel is to place a 2D touch detection module on a cover plate and place a polymer coating layer on the side of the 2D touch detection module away from the cover plate. Coating, drying the polymer coating layer, forming a dry polymer coating layer, coating the light transmissive electrode layer on the side of the dry polymer coating layer away from the two-dimensional touch detection module, and polling the dry polymer coating layer. , Converts a dry polymer coating layer into a pressure sensing coating layer.

In one embodiment of the present disclosure, the coating of the light transmissive electrode layer is performed prior to polling the dry polymer coating layer.

In one embodiment of the present disclosure, the coating of the light transmissive electrode layer is performed after polling the dry polymer coating layer.

Therefore, in the three-dimensional detection panel of the present disclosure, the two-dimensional touch detection module adopts the OGS method, and the pressure detection coating layer and the light-transmitting electrode layer are sequentially formed on the two-dimensional touch detection module by the coating process. There is. Therefore, the use of an adhesive can be omitted, and the overall thickness and manufacturing cost can be effectively reduced. Further, the two-dimensional touch detection module using the OGS method is thinner than the two-dimensional touch detection module using the GFF method (that is, the OGS method uses an adhesive to laminate the multilayer structure of the GFF method. Excellent signal conduction (using a dielectric layer as a bridge to concentrate the touch-sensing electrode layer to a single layer thickness), while eliminating the thickness used and resulting in a reduced force transfer rate. The characteristics can be obtained, and the extraction efficiency of the power signal can be improved.

It should be understood that both the general description described above and the detailed description below are by way of example and are intended to provide further description of the requested disclosure.

The present disclosure can be more fully understood by reading the detailed description of the following embodiments with reference to the accompanying drawings.

It is a schematic diagram of the electronic apparatus according to one Embodiment of this disclosure.

It is a top view of the two-dimensional touch detection module of FIG.

It is a top view of the pressure detection covering layer by one Embodiment of this disclosure.

It is a graph of the force vs. force signal strength of the three-dimensional detection panel using the OGS (one glass solution) type touch detection module and the GFF (glass-film-film) type touch detection module, respectively.

It is a flowchart of the manufacturing method of the 3D detection panel by one Embodiment of this disclosure.

Hereinafter, embodiments of the present disclosure exemplified in the accompanying drawings will be referred to in detail. Wherever possible, use the same reference numbers in drawings and descriptions to refer to the same or similar parts. However, the particular structural and functional details disclosed herein are merely representative for purposes of illustrating exemplary embodiments and can be embodied in many alternative forms. , Should not be construed as being limited to the exemplary embodiments described herein. Accordingly, it is not intended to limit the exemplary embodiments to the particular embodiments disclosed, whereas the exemplary embodiments cover all modifications, equivalents, and alternatives within the scope of the disclosure. Please understand that it is what you do.

See FIG. FIG. 1 is a schematic diagram of an electronic device 100 according to an embodiment of the present disclosure. As shown in FIG. 1, the electronic device 100 of the present embodiment is a touch display device as an example, and includes a three-dimensional detection panel and a display module 190. The display module 190 is located below the 3D detection panel.

Specifically, the three-dimensional detection panel includes a cover plate 110, a shielding layer 120, an optical matching layer 130, and a plurality of traces 150 (only one is shown in FIG. 1). The cover plate 110 defines a touch region 111 and a peripheral region 112 surrounding the touch region 111. The shielding layer 120 is arranged in the peripheral region 112 of the cover plate 110. The optical matching layer 130 is arranged on the cover plate 110, covers the shielding layer 120, and flattens the upper surface of the touch region 111. The trace 150 is arranged on the optical matching layer 130 and is arranged in the peripheral region 112. Therefore, when viewed from the bottom surface of the cover plate 110, the shielding layer 120 can shield the trace 150 from the observer.

In some embodiments, the material of the cover plate 110 includes, but is not limited to, glass.

See FIG. 1A. FIG. 1A is a top view of the two-dimensional touch detection module 140 of FIG. As shown in FIGS. 1 and 1A, the 3D detection panel further includes a 2D touch detection module 140. The two-dimensional touch detection module 140 is arranged in the touch region 111 and includes a first touch detection electrode layer 141, a dielectric layer 142, and a second touch detection electrode layer 143. The first touch detection electrode layer 141 is arranged on the optical matching layer 130 and includes a plurality of first axis conductive units 141a, which are separated from each other in the touch region 111 (as shown in FIG. 1A). The second touch detection electrode layer 143 is arranged on the optical matching layer 130 and includes a plurality of second axis conductive units 143a, which are separated from each other in the touch region 111 and intersect with the first axis conductive unit 141a. is doing. More specifically, the first axis conductive unit 141a may be a plurality of diamond-like electrodes connected in series so as to form the first axis conductive channel (as shown in FIG. 1A), but the electrodes. The shape of is not limited to this, and may be another electrode shape. The plurality of first-axis conductive channels form the first touch detection electrode layer 141. Similarly, the 2nd axis conductive unit 143a may be a plurality of diamond-like electrodes connected in series so as to form a 2nd axis conductive channel (as shown in FIG. 1A), but the shape of the electrodes is The shape is not limited to this, and other electrode shapes may be used. The plurality of second axis conductive channels form the second touch detection electrode layer 143.

The dielectric layer 142 covers the first-axis conductive unit 141a and electrically insulates the first-axis conductive unit 141a and the second-axis conductive unit 143a. Therefore, the touch signal (mutual capacitance detection signal or the like) between the first touch detection electrode layer 141 and the second touch detection electrode layer 143 can be extracted via the trace 150.

Specifically, the above-mentioned "first axis" and "second axis" are, for example, two axes orthogonal to each other (for example, an X axis and a Y axis). That is, the first-axis conductive unit 141a (first-axis conductive channel) is a conductive wire extending along the first axis, and can be arranged at intervals along the second axis. The second-axis conductive unit 143a (second-axis conductive channel) is a conductive wire extending along the second axis, and can be arranged at intervals along the first axis.

Further, the second-axis conductive unit 143a intersects with the first-axis conductive unit 141a from above, and the dielectric layer 142 is electrically operated at least at the intersection of the first-axis conductive unit 141a and the second-axis conductive unit 143a. Insulated. Since it can be seen that the second touch detection electrode layer 143 is separated from the first touch detection electrode layer 141 by the dielectric layer 142 to form a bridge-like structure, the two-dimensional touch detection module 140 of the present embodiment is , OGS-SITO (One Glass Solution single-sided indium tin oxide (ITO)) type touch module.

As shown in FIG. 1, the three-dimensional detection panel further includes a pressure detection coating layer 160 and a light transmissive electrode layer 170. The pressure detection coating layer 160 is coated on the side of the two-dimensional touch detection module 140 away from the cover plate 110. The light transmissive electrode layer 170 is coated on the side of the pressure detection coating layer 160 away from the two-dimensional touch detection module 140. The force signal generated by the pressure detection covering layer 160 can be taken out via the light transmitting electrode layer 170.

In some embodiments, the material of the pressure sensing coating layer 160 comprises polyvinylidene fluoride (PVDF). That is, the pressure detection covering layer 160 is a lattice-shaped piezoelectric material. When the crystal of this material is deformed by applying pressure in a certain direction, the size and direction of the dipole also change, and the amount of charge also changes to generate a voltage.

In some embodiments, the thickness of the pressure sensing coating layer 160 ranges from about 7 μm to about 10 μm (preferably about 8 μm).

With the above configuration, the two-dimensional touch detection module 140 adopts the OGS method, and the pressure detection coating layer 160 and the light transmissive electrode layer 170 are sequentially formed on the two-dimensional touch detection module 140 by a coating process. Therefore, it is possible to omit the adhesive used to integrate the 2D touch panel and the external pressure sensor into the conventional 3D touch-pressure integrated panel, and the overall thickness and manufacturing cost are effective. Can be reduced to.

See FIG. FIG. 3 is a graph of the strength of the force-versus-force signal of the three-dimensional detection panel using the OGS type touch detection module and the GFF (Glass-Film-Film) type touch detection module. For example, the experimental targets used to generate the graph shown in FIG. 3 may be the 3D detection panel shown in FIG. 1 and another 3D detection panel using a GFF touch sensor model. Can be done. From FIG. 3, the intensity of the force signal obtained by the 3D detection panel using the OGS type touch detection module under the same force is significantly larger than that of the 3D detection panel using the GFF type touch detection module. It is clear that it helps to improve the signal extraction efficiency. The two-dimensional touch detection module 140 adopting the OGS method of the present embodiment can obtain excellent signal transmission characteristics because the two-dimensional touch detection module 140 is thin, whereas the GFF method touch detection module can obtain excellent signal transmission characteristics. This is because the thickness is large due to the adhesive required to bond the two films. It can also be said that the excessive thickness of the GFF structure due to the multi-layer stack structure causes force transfer attenuation, resulting in unclear strength of the force signal that can be extracted by pressure detection.

As shown in FIG. 1, the 3D detection panel further comprises an adhesive 180. The display module 190 is adhered to the side of the light transmissive electrode layer 170 away from the pressure detection coating layer 160.

In some embodiments, the light transmissive electrode layer 170 can be a silver nanowire (also referred to as SNW, AgNW) electrode layer. In particular, the light transmissive electrode layer 170 includes a substrate and silver nanowires doped therein. The silver nanowires overlap each other in the substrate to form a conductive network. Substrate refers to a non-nano silver material formed by a solution containing silver nanowires through processes such as coating, heating, and drying. Silver nanowires are distributed or embedded within the substrate and partially project from the substrate. The substrate can protect the silver nanowires from the external environment, such as protecting the silver nanowires from corrosion and wear. In some embodiments, the substrate is compressible.

In some embodiments, the wire length of the silver nanowires ranges from about 10 μm to about 300 μm. In some embodiments, the wire diameter (or wire width) of the silver nanowires is less than about 500 nm. In some embodiments, the aspect ratio of silver nanowires (the ratio of wire length to wire diameter) is greater than 10. In some embodiments, the silver nanowires can be in variants such as other silver-coated conductive metal nanowires or non-conductive nanowires. Silver nanowires The use of silver nanowires to form electrode layers has advantages over ITO, such as low cost, simple process, good flexibility, and resistance to bending.

In some embodiments, at least one of the first touch detection electrode layer 141 or the second touch detection electrode layer 143 can be a silver nanowire electrode layer, a metal grid or an indium tin oxide (ITO) electrode layer. , The present disclosure is not limited to this.

In some embodiments, the 3D detection panel has a light transmission of greater than 90% (visible light with wavelengths in the wavelength range of 400-700 nm) and a haze of less than 3%. In order to make the three-dimensional detection panel meet the above-mentioned requirements regarding light transmittance and haze, in some embodiments, at least one of the first touch detection electrode layer 141 or the second touch detection electrode layer 143 is silver. It is a nanowire electrode layer.

In some embodiments, the value of the L * axis (luminance axis) of the CIELAB color space of the three-dimensional detection panel measured by a colorimeter is 92 or greater, but the present disclosure is not limited in this regard.

In some embodiments, the value of the a * axis (ie, the red-green axis) of the CIELAB color space of the three-dimensional detection panel measured by a colorimeter ranges from about -1.5 to about 1.5. However, this disclosure is not limited in this regard.

In some embodiments, the value of the b * axis (ie, the yellow-blue axis) of the CIELAB color space of the 3D detection panel ranges from about -2 to about 2, but the present disclosure relates to this point. Not limited.

See FIG. FIG. 2 is a top view of the pressure detection covering layer 160 according to the embodiment of the present disclosure. As shown in FIG. 2, the pressure detection covering layer 160 includes a plurality of pressure detection blocks 161. The pressure detection blocks 161 are separated from each other. Further, the light-transmitting electrode layer 170 includes a plurality of electrode blocks (not shown, but refer to the shape of the pressure detection block 161). The electrode blocks are spaced apart from each other and are in contact with the pressure detection block 161. As a result, the force signal generated in each pressure detection block 161 can be extracted from each electrode block, and multi-finger pressure detection can be performed.

See FIG. FIG. 4 is a flowchart of a method for manufacturing a three-dimensional detection panel according to an embodiment of the present disclosure. As shown in FIG. 4, the method includes steps S101 to S105.

In step S101, the two-dimensional touch detection module is arranged on the cover plate.

In step S102, the polymer coating layer is coated on the side of the two-dimensional touch detection module away from the cover plate.

In some embodiments, step S102 may be performed by the printing process, but disclosure is not limited in this regard.

In step S103, the polymer coating layer is dried.

In some embodiments, step S103 can be performed by firing the polymer coating layer at a temperature of about 60 ° C. for about 30 minutes and then annealing the polymer coating layer at a temperature of about 135 ° C. for about 30 minutes. However, disclosure is not limited in this regard.

In step S104, the light-transmitting electrode layer is coated on the side of the dried polymer coating layer away from the two-dimensional touch detection module.

In some embodiments, step S104 can be performed by a spin coating process with a rotation speed of about 3000 rpm, but disclosure is not limited in this regard.

In step S105, the dry polymer coating layer is polled to convert the dry polymer coating layer into a pressure sensing coating layer.

In some embodiments, the material of the polymer coating layer comprises PVDF. Before polling the polymer coating layer, the dipole orientations are randomly placed. When polling the dry polymer coating layer, an electric field can be applied to the dry polymer coating layer so that the dipoles are oriented in the forward direction based on the magnetic field lines of the electric field.

In the present embodiment, the coating step of the light transmitting electrode layer (that is, step S104) is performed before the polling step of the dry polymer coating layer (that is, step S105), but in other embodiments, the light transmitting step is performed. The coating step of the sex electrode layer may be performed after the polling step of the dry polymer coating layer.

According to the above description of the embodiments of the present disclosure, in the three-dimensional detection panel of the present disclosure, the two-dimensional touch detection module adopts the OGS method, and the pressure detection coating layer and the light transmissive electrode layer are formed by a coating process. It can be seen that they are sequentially formed on the dimensional touch detection module. Therefore, the use of an adhesive can be omitted, and the overall thickness and manufacturing cost can be effectively reduced. Further, the two-dimensional touch detection module using the OGS method is thinner than the two-dimensional touch detection module using the GFF method (that is, the OGS method uses an adhesive to laminate the multilayer structure of the GFF method. Excellent signal conduction (using a dielectric layer as a bridge to concentrate the touch-sensing electrode layer to a single layer thickness), while eliminating the thickness used and resulting in a reduced force transfer rate. The characteristics can be obtained, and the extraction efficiency of the power signal can be improved.

The present disclosure has been described in considerable detail with reference to that particular embodiment, but other embodiments are possible. Therefore, the spirit and scope of the appended claims should not be limited to the description of the embodiments contained herein.

It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the present disclosure without departing from the scope or spirit of the present disclosure. In view of the above, the present disclosure is intended to cover any amendments and variations of the present disclosure, provided that it is within the scope of the following claims.

Claims (14)

A cover plate that defines the touch area and the peripheral area surrounding the touch area,
The two-dimensional touch detection module arranged in the touch area and
A pressure detection coating layer coated on the side of the two-dimensional touch detection module away from the cover plate,
A light-transmitting electrode layer coated on the side of the pressure detection coating layer away from the two-dimensional touch detection module, and
including,
3D detection panel. The material of the pressure sensing coating layer comprises polyvinylidene difluoride (PVDF).
The three-dimensional detection panel according to claim 1. The thickness of the pressure detection coating layer is in the range of about 7 μm to about 10 μm.
The three-dimensional detection panel according to claim 1 or 2. The two-dimensional touch detection module is an OGS-SITO (one glass solution single-sided indium tin oxide) type touch module.
The three-dimensional detection panel according to any one of claims 1 to 3. The light-transmitting electrode layer is a silver nanowire electrode layer.
The three-dimensional detection panel according to any one of claims 1 to 4. The value of the L * axis of the CIELAB color space of the three-dimensional detection panel is 92 or more.
The three-dimensional detection panel according to any one of claims 1 to 5. The value of the a * axis in the CIELAB color space of the three-dimensional detection panel is in the range of about −1.5 to about 1.5.
The three-dimensional detection panel according to any one of claims 1 to 6. The value of the b * axis in the CIELAB color space of the three-dimensional detection panel is in the range of about -2 to about 2.
The three-dimensional detection panel according to any one of claims 1 to 7. The pressure detection coating layer comprises a plurality of pressure detection blocks separated from each other.
The three-dimensional detection panel according to any one of claims 1 to 8. The light-transmitting electrode layers are spaced apart from each other and include a plurality of electrode blocks that each contact the pressure detection block.
The three-dimensional detection panel according to claim 9. A cover plate that defines the touch area and the peripheral area surrounding the touch area,
The two-dimensional touch detection module arranged in the touch area and
A pressure detection coating layer coated on the side of the two-dimensional touch detection module away from the cover plate,
A light-transmitting electrode layer coated on the side of the pressure detection coating layer away from the two-dimensional touch detection module, and
including,
3D detection panel and
A display module arranged on the opposite side of the light-transmitting electrode layer to the pressure detection coating layer, and
To prepare
Electronic device. Place the 2D touch detection module on the cover plate,
The side of the two-dimensional touch detection module away from the cover plate is coated with a polymer coating layer.
The polymer coating layer is dried to form a dry polymer coating layer,
A light-transmitting electrode layer is coated on the side of the dry polymer coating layer away from the two-dimensional touch detection module.
The dry polymer coating layer is polled to convert the dry polymer coating layer into a pressure sensing coating layer.
Manufacturing method of 3D detection panel. The coating of the light transmissive electrode layer is performed before polling the dry polymer coating layer.
The method according to claim 12. The coating of the light-transmitting electrode layer is performed after polling the dry polymer coating layer.
The method according to claim 12.

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