Touch panel

Touch panel

TOUCH PANEL

The present disclosure relates to a touch panel, and relates to a touch panel with a poly(vinylidene fluoride) (PVDF) substrate.

In recent years, touch panels have become the mainstream of various electronic products. Therefore, how to improve the optical properties of touch panels is a very important topic today.

Polyvinylidene fluoride (PVDF) is a material with excellent mechanical strength among fluororesins. It can still maintain good strength under high temperature and high pressure, and has good toughness, high hardness, good wear resistance, outstanding UV resistance and weather resistance. Aging performance, as well as good chemical stability and thermal stability. However, composite materials have low light transmittance and excessively high color shift, which tends to form films with poor optical properties.

In addition, the optical properties and cost of the polyethylene terephthalate (PET) substrates and polyimide (PI) substrates currently used in the industry still have room for improvement. Therefore, the touch components of the polyvinylidene fluoride vinyl board are competitive. Advantage. That is, what the industry needs is a novel polyvinylidene fluoride composite material, which also has good optical properties.

The present disclosure provides a touch panel. The touch panel includes a polyvinylidene fluoride (PVDF) substrate and a touch electrode structure. The touch electrode structure is disposed on at least one of the first and second surfaces of the PVDF board.

In order to make the above-mentioned features and advantages of the present disclosure more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

<p>100Touch Panel</p><p>110, 820, 930Polyvinylidene fluoride vinyl sheet</p><p>112First Surface</p><p>114Second Surface</p><p>120, 830, 940Touch electrode structure</p><p>122,620,840Protection layer</p><p>200~206Step</p><p>300Display</p><p>302Double electrode structure</p><p>302a, 308First electrode</p><p>302b, 310Second electrode</p><p>304,312Insulation layer</p><p>306Bridge electrode structure</p><p>310a, 310belectrode layer</p><p>314Bridge wire</p><p>400,960First adhesion layer</p><p>500Second attachment layer</p><p>510Cover</p><p>600,700Polyvinylidene fluoride layer</p><p>610Buffer layer</p><p>630Adhesive layer</p><p>800, 900touch display panel</p><p>810Soft display</p><p>820a, 820bsurface</p><p>850,980Hard coating</p><p>860Soft PVDF touch panel</p><p>910OLED display</p><p>912OLED display element</p><p>920Functional touch panel</p><p>950Functional film</p><p>970Side wall gas barrier structure</p>

FIG. 1 is a schematic diagram of a touch panel according to the first embodiment of the disclosure.

Fig. 2 is a production process diagram of the polyvinylidene fluoride sheet of the first embodiment.

3A is a schematic diagram of an example of the touch display panel of the second embodiment.

3B is a schematic diagram of another example of the touch display panel of the second embodiment.

3C is a schematic diagram of another example of the touch display panel of the second embodiment.

FIG. 4A is a schematic diagram of a touch display panel according to a third embodiment of the disclosure.

4B is a schematic diagram of a touch display panel according to another example of the third embodiment.

FIG. 5A is a schematic diagram of a touch display panel according to a fourth embodiment of the disclosure.

FIG. 5B is a schematic diagram of a touch display panel according to another example of the fourth embodiment.

FIG. 6A is a schematic diagram of a touch display panel according to a fifth embodiment of the disclosure.

FIG. 6B is a schematic diagram of a touch display panel according to another example of the fifth embodiment.

FIG. 7 is a schematic diagram of a touch display panel according to a sixth embodiment of the disclosure.

FIG. 8A is a schematic diagram of a touch display panel according to a seventh embodiment of the disclosure.

FIG. 8B is a schematic diagram of a touch display panel of another example of the seventh embodiment.

FIG. 8C is a schematic diagram of a touch display panel according to another example of the seventh embodiment.

FIG. 9A is a schematic diagram of a touch display panel according to an eighth embodiment of the disclosure.

FIG. 9B is a schematic diagram of a touch display panel according to another example of the eighth embodiment.

FIG. 9C is a schematic diagram of a touch display panel of another example of the eighth embodiment.

FIG. 1 is a schematic diagram of a touch panel according to the first embodiment of the disclosure.

1, the touch panel 100 of the first embodiment includes a polyvinylidene fluoride vinyl plate 110 and a touch electrode structure 120. The PVDF board 110 has a first surface 112 and a second surface 114 opposite to each other. In the first implementation, the touch electrode structure 120 is disposed on the first surface 112 of the PVDF plate 110, but the disclosure is not limited to this, and the touch electrode structure 120 may also be disposed on the second surface 114. In addition, a protective layer 122 can also be provided on the first surface 112 of the PVDF board 110 to cover and protect the touch electrode structure 120, but the present disclosure is not limited to this, and the protective layer 122 can also be omitted or Replaced by functional membranes. The so-called functional film is, for example, a film having a side wall barrier (SWB), feedback (Feedback), a color filter, a polarizer, etc., and preferably has a side wall barrier function.

The thickness of the polyvinylidene fluoride sheet 110 is, for example, 0.1 μm to 350 μm, and the thickness is preferably 0.5 μm to 50 μm. The material of the polyvinylidene fluoride plate 110 includes polyvinylidene fluoride and inorganic nano-modified materials dispersed in polyvinylidene fluoride. The inorganic nano-modified materials are, for example, silite clay and leeches after hydrogen ion exchange. Stone, tubular kaolin, Sericite, synthetic mica, synthetic hydrotalcite, synthetic hexamonite clay, or a combination of these substances. In the polyvinylidene fluoride sheet 110, the weight ratio of the polyvinylidene fluoride to the inorganic nano-modified material is, for example, 97:3-20:80, and the haze may be less than or equal to 2. Therefore, the polyvinylidene fluoride sheet 110 of the present disclosure is actually preferably made of modified polyvinylidene fluoride.

In the present disclosure, the touch electrode structure 120 is a single-layer electrode structure, but the present disclosure is not limited to this. The touch electrode structure 120 may also be a double-layer electrode structure or a bridging electrode structure, as detailed below. When the touch electrode structure 120 is subjected to a change in the sensing electrical properties caused by the user's touch, the voltage or capacitance changes between the sensing elements therein, so that the correct position of the user's touch on the panel can be known .

The polyvinylidene fluoride sheet 110 in the touch panel 100, for example, can be coated into a sheet and output as a whole roll. The subsequent touch electrode structure 120 and the protective layer 122 on it can be fabricated in a roll-to-roll (R2R) manner, and The polyvinylidene fluoride vinyl sheet 110 can also be implemented in a sheet-to-sheet manner. The specific implementation of layer-to-layer is shown in FIG. 2.

In an embodiment of the present disclosure in FIG. 2, step 200 is to first form a release area on a carrier plate. The carrier plate may be glass, polymethylmethacrylate (PMMA) or other rigid materials capable of being carried. As for the forming method of the release area, for example, a release layer is formed or an adhesion area is formed outside the release area.

In step 202, coating and drying of a polyvinylidene fluoride (PVDF) substrate are performed, wherein the area of the polyvinylidene fluoride (PVDF) substrate can be greater than or equal to the release area. In step 204, a touch control layer is fabricated on the polyvinylidene fluoride vinyl plate in the release area.

With the mechanism that the adhesion between the release area and the carrier is less than the adhesion between the PVDF board and the carrier, the release is achieved through the cutting process of step 206. However, the structure of the present disclosure is not limited to the products implemented by the above-mentioned manufacturing process.

3A, 3B, and 3C are respectively schematic diagrams of three examples of the touch display panel according to the second embodiment of the present disclosure.

In FIG. 3A, there are the touch panel 100 of the first embodiment and a display 300. The display 300 is arranged on the second surface 114 of the PVDF board 110 to form a touch display panel. The above-mentioned display 300 is, for example, a hard display, a soft display, or an OLED display. However, the present disclosure is not limited to this, and the position of the display 300 can also be above the touch electrode structure 120, and the following embodiments are all applicable.

When a user uses such a touch display panel, the first surface 112 may be a surface facing the user. The second surface 114 is opposite to the first surface 112, and the PVDF board 110 is disposed on the display 300 through the second surface 114.

The touch electrode structure 120 in the second embodiment can also have other types. The double-layer electrode structure 302 shown in FIG. 3B includes a plurality of first electrodes 302a, a plurality of second electrodes 302b, and an insulating layer 304 therebetween. . A plurality of first electrodes 302a are formed on the PVDF plate 110, and are arranged along the first direction without overlapping each other. The insulating layer 304 is formed on the PVDF board 110 and covers the plurality of first electrodes 302a. A plurality of second electrodes 302b are formed on the insulating layer 304 and are arranged along the second direction without overlapping each other, wherein the first direction may be perpendicular to the second direction.

In addition, the second electrode 302b in FIG. 3B can also be set on polyvinylidene fluoride. The second surface 114 of the olefin substrate 110, in this way, the PVDF board 110 is an insulating layer between the first electrode 302a and the second electrode 302b, so it can replace the function of the aforementioned insulating layer 304.

The touch electrode structure 120 in the second embodiment can also be changed to the bridge electrode structure 306 shown in FIG. 3C. The bridge electrode structure 306 of FIG. 3C includes a plurality of first electrodes 308, a plurality of second electrodes 310, and an insulating layer 312 therebetween. Moreover, the second electrode 310 is composed of two upper and lower electrode layers 310 a and 310 b, and is connected by a bridging wire 314. The first electrode 308 and the electrode layer 310a also located on the first surface 112 of the PVDF board 110 are not in contact with each other, and the electrode layer 310b located on the insulating layer 312 bridges the wire 314 with the underlying electrode layer. 310a is electrically connected.

The touch electrode structure in the first and second embodiments described above can be, for example, a transparent electrode material, such as indium tin oxide (ITO); or a nano-silver electrode, a metal mesh electrode, or an electrode designed to be used for touch control Wait.

FIG. 4A is a schematic diagram of a touch display panel according to a third embodiment of the disclosure. Compared with the second embodiment, the touch display panel of FIG. 4A is the same as the touch display panel of FIG. 3A except that it further includes the first adhesion layer 400, so the same component symbols are used to denote the same Element, and the description of the same element is omitted. The first adhesive layer 400 is disposed between the display 300 and the polyvinylidene fluoride vinyl plate 110, and its material is, for example, Pressure Sensitive Adhesive (PSA), Optically Clear Adhesive (OCA), and photosensitive water. Glue (UV glue), Optical Clear Resin (OCR), etc. First adhesion layer 400 The main function of is to improve the adhesion between the display 300 and the PVDF board 110. In the present disclosure, the touch electrode structure 120 is a single-layer electrode structure, but the present disclosure is not limited to this. The touch electrode structure 120 may also be a double-layer electrode structure shown in FIG. 3B or a bridge electrode structure shown in FIG. 3C. structure.

4B is a schematic diagram of a touch display panel according to another example of the third embodiment. In FIG. 4B, the first adhesion layer 400 is located between the display 300 and the touch electrode structure 120. At this time, the touch electrode structure 120 may be disposed on the second surface 114 of the PVDF board 110. Of course, the touch electrode structure 120 can also be replaced with the double-layer electrode structure of FIG. 3B or the bridge electrode structure of FIG. 3C.

FIG. 5A is a schematic diagram of a touch display panel according to a fourth embodiment of the disclosure. Compared with the third embodiment, the touch display panel of FIG. 5A further includes a second adhesion layer 500 and a cover 510, and other components are the same as those of the touch display panel of FIG. 4A, so The same element symbols denote the same elements, and the description of the same elements is omitted.

Referring to FIG. 5A, the second adhesion layer 500 is disposed between the protective layer 122 and the cap layer 510. The material of the second adhesion layer 500 is, for example, Pressure Sensitive Adhesive (PSA), Optically Clear Adhesive (OCA), photosensitive water glue (UV glue), and optical clear resin (Optical Clear Resin, OCR), etc., whose function is mainly to improve the adhesion between the protective layer 122 and the cover layer 510. The cover layer 510 is, for example, glass, polymethyl methacrylate (PMMA), polycarbonate (PC), or the like. The function of the cover layer 510 is mainly to prevent the touch electrode structure 120 covered by the protective layer 122 from being damaged when the user uses the touch surface. on the other hand, If the second adhesion layer 500 used does not affect the conductive properties of the touch electrode structure 120, the protective layer 122 in the figure can be omitted, so that the second adhesion layer 500 is directly disposed between the cover layer 510 and the touch electrode structure 120 , It can also achieve the effect of preventing damage to the touch electrode structure 120.

FIG. 5B is a schematic diagram of a touch display panel of another example of the fourth embodiment. The difference from FIG. 5A is that the positions of the polyvinylidene fluoride vinyl plate 110 and the protective layer 122 are interchanged, so the touch electrode structure 120 can be disposed at The second surface 114 of the PVDF board 110. Moreover, referring to the structure shown in FIG. 4B, the touch display panel of this figure can also omit the protective layer 122 and directly contact the touch electrode structure 120 with the first adhesion layer 400.

In addition to the single-layer electrode structure shown in FIG. 3A, the touch electrode structure 120 in the third and fourth embodiments described above may also use the double-layer electrode structure shown in FIG. 3B or the bridge type shown in FIG. 3C. Electrode structure.

6A-6B are schematic diagrams of three types of touch display panels according to the fifth embodiment of the present disclosure. Compared with FIG. 3B of the second embodiment, the touch display panel of FIGS. 6A to 6B further includes a polyvinylidene fluoride (PVDF) layer 600 and a buffer layer 610, and other elements are the same as those of the second embodiment. The control and display panels are similar, so the same component symbols are used to denote the same components, and the description of the same components is omitted.

6A, the polyvinylidene fluoride layer 600 in the touch display panel is disposed between the plurality of first electrodes 302a and the plurality of second electrodes 302b, as the plurality of first electrodes 302a and the plurality of second electrodes 302b The material of the insulating layer in between can be made of modified polyvinylidene fluoride like the polyvinylidene fluoride sheet 110. The manufacturing process of this layer of polyvinylidene fluoride layer 600 can be coating; this polyvinylidene fluoride layer 600 is preferably not in contact with the polyvinylidene fluoride sheet 110, so it can be used between the polyvinylidene fluoride layer 600 and the polyvinylidene fluoride sheet. A buffer layer 610 is formed between 110, and the buffer layer 610 may be SiO_xOr SiN_xOr SiO_xN_yAnd other materials. The thickness of the polyvinylidene fluoride layer 600 is, for example, 0.1 μm to 200 μm, preferably 0.5 μm to 5 μm. Since the dielectric coefficient (k) of the polyvinylidene fluoride material itself is about 7, if the polyvinylidene fluoride layer 600 is disposed in the touch panel, the touch panel can have tactile feedback characteristics. Using the induced charge generated by the tactile feedback driving voltage, the design of the driving waveform achieves the effect of tactile feedback, and using the time-sharing driving of touch and feedback, the touch feedback element can achieve the effect of both touch and feedback; therefore The higher the dielectric constant of the insulating layer in the touch feedback element, the lower the driving voltage required for tactile feedback. Compared with the dielectric constant of general polymer materials, which is about 3, the dielectric constant of polyvinylidene fluoride The coefficient is about 7, so when the polyvinylidene fluoride layer 600 is configured in the touch panel, the touch panel can show a better feedback effect.

Table 1 below shows the comparison between the polyvinylidene fluoride layer of this embodiment and the polyimide (PI).

Test condition: Square wave @ 100HZ

<tables><img file="twm472252u_d0001.tif" he="721" img-content="drawing" img-format="tif" inline="no" orientation="portrait" wi="1996" /></tables>

It can be obtained from Table 1 that the dielectric coefficient of the insulating layer has a high influence on the tactile sensation. Only one tester could not judge the difference. The average voltage difference of the testers was 37V, and the induced voltage difference of one of the testers could reach 100V. Therefore, when the touch panel is equipped with polyvinylidene fluoride, the experiment proved that the touch panel can be enabled. Shows a better feedback effect.

FIG. 6B is a schematic diagram of another example of the touch display panel of the fifth embodiment. In FIG. 6B, the position of the first electrode 302a is different from that of FIG. 6A in that it is provided on the first surface 112 of the PVDF plate 110, and the buffer layer 610 covering it can be used as a protective layer. A plurality of second electrodes 302b are provided on polyvinylidene fluoride under the graphene layer 600, protective layer 620 may be otherwise disposed between the polyvinylidene fluoride layer 600 and the buffer layer 610. In addition, between the buffer layer 610 and the protective layer 620, an adhesive layer 630 may be used to bond the two. On the other hand, as long as the adhesive layer 630 used does not damage the first electrode 302a and the second electrode 302b, the buffer layer 610 and the protective layer 620 in the figure can be omitted, so that the adhesive layer 630 is directly arranged on the PVDF board 110 The upper first electrode 302a is between the polyvinylidene fluoride layer 600 and covers the second electrode 302b.

In addition, in the fifth embodiment, the first adhesion layer of the third embodiment and/or the second adhesion layer and the cover layer of the fourth embodiment may also be provided, so the details are not repeated here.

FIG. 7 is a schematic diagram of a touch display panel according to a sixth embodiment of the disclosure. Compared with the second embodiment, the touch display panel of FIG. 7 has an additional layer of polyvinylidene fluoride layer 700, and other components are the same as the touch display panel of FIG. 3A, so they are represented by the same component symbols. The description of the same element is omitted. As polyvinylidene fluoride (PVDF) has good anti-reflective properties and anti-ultraviolet capabilities, when using the polyvinylidene fluoride layer 700 as the hard coat of the touch panel 100, it also has anti-reflection and anti-UV functions. In order to improve the life of the product Life. The polyvinylidene fluoride layer 700 can be formed on the touch panel 100 using coating or laminating technology. In this embodiment, the touch electrode structure 120 is a single-layer electrode structure, but it can also be a double-layer electrode structure as shown in FIG. 3B or a bridge electrode structure as shown in FIG. 3C.

In all the above embodiments, the PVDF board 110 has good light transmission properties and low color shift, and compared with other types of touch panels in Table 2 below, the PVDF board of the present disclosure has good light transmission properties and low color shift. The thickness is relatively thin. Therefore, when the polyvinylidene fluoride vinyl sheet is integrated with the soft display, the light transmittance of the touch panel can be improved to make the color shift close to zero, so that the touch panel has better optical characteristics. In addition, in the above-mentioned fourth and fifth embodiments, since the polyvinylidene fluoride layer is additionally disposed in the touch panel, the tactile feedback characteristics of the touch panel can be increased, and the electrical efficiency of the touch panel can be improved.

<tables><img file="twm472252u_d0002.tif" he="1154" img-content="drawing" img-format="tif" inline="no" orientation="portrait" wi="2052" /></tables>

FIG. 8A is a schematic diagram of a touch display panel according to a seventh embodiment of the disclosure.

8A, the touch display panel 800 includes a flexible display (flexible display) 810, a PVDF board 820, and a touch electrode structure 830, wherein a protective layer 840 can be provided on the touch electrode structure 830. The components of the foregoing embodiments can be correspondingly used in this embodiment, so they will not be described in detail.

FIG. 8B is a schematic diagram of a touch display panel of another example of the seventh embodiment. The difference between FIG. 8B and FIG. 8A is that there is an additional layer of hard coat (Hard coat) 850. The other components are the same as the touch display panel of FIG. The formation method of the above-mentioned hard coat layer 850 may be a coating method such as spin coating, screen printing, or die coating, or the hard coat layer 850 may be produced by a deposition method. The material of the hard coat layer 850 may be an organic material, an inorganic material, or an organic-inorganic hybrid material. On the other hand, if the hard coat layer 850 used does not affect the conductive properties of the touch electrode structure 830, the protective layer 840 in the figure can be omitted so that the hard coat layer 850 is directly disposed on the touch electrode structure 830. The effect of preventing damage to the touch electrode structure 830 is achieved.

FIG. 8C is a schematic diagram of a touch display panel according to another example of the seventh embodiment. The difference between FIG. 8C and FIG. 8B is that the positions of the PVDF board 820 and the protective layer 840 are exchanged. The other components are the same as the touch display panel of FIG. 8B, so the same component symbols are used to denote the same components. The manufacturing method of the touch display panel in FIG. 8C can be roll-to-roll (R2R) manufacturing. A hard coating 850 is formed on one surface 820a of the polyvinylidene fluoride plate 820, and the other surface 820b of the polyvinylidene fluoride plate 820 is formed with The touch electrode structure 830. In addition, the manufacturing method of the touch display panel in FIG. 8C can also be made with Flex-UP (Flexible Universal Plane technology), that is, using a method similar to that shown in FIG. 2 In the manufacturing process, the release area is formed on the carrier first, and then the hard coat layer 850 is formed, and then the PVDF board 820 is coated on the hard coat layer 850, and then the touch electrode structure 830 is fabricated on the PVDF board 820 And the protective layer 840, and then cut to remove the soft polyvinylidene fluoride vinyl panel touch element 860 with the hard coating layer 850. The flexible polyvinylidene fluoride-based touch element 860 can be removed first and then attached to the flexible display 810, or first attached to the flexible display 810 and then cut and removed. On the other hand, if the used bonding material does not affect the conductive properties of the touch electrode structure 830, the protective layer 840 in the figure can be omitted.

FIG. 9A is a schematic diagram of a touch display panel according to an eighth embodiment of the disclosure.

9A, the touch display panel 900 basically includes a display, such as an OLED display 910 and a functional touch panel 920, where the functional touch panel 920 is located on the OLED display 910, and the functional touch panel 920 includes poly Vinylidene fluoride vinyl plate 930, touch electrode structure 940 and a layer of functional film 950. In this embodiment, the functional touch panel 920 refers to a touch film that integrates at least gas barrier and touch functions, and can be used as a packaging film of a flexible functional touch film for packaging display elements. The functional film 950 in the functional touch layer 920 can also have functions such as a side wall barrier (SWB), feedback (Feedback), color filter, polarizer, etc., and preferably has a side wall barrier function. The functional film 950 in this figure is fabricated after the touch electrode structure 940, but the present disclosure is not limited to this. In other words, the functional film 950 can also be fabricated before the touch electrode structure 940 is formed; or the functional film 950 can be directly disposed on the polyvinylidene fluoride vinyl plate 930 and the touch electrode structure 940 The middle is used as an insulating layer, as shown in the double-layer electrode structure of FIG. 3B, so it is not repeated here.

In addition, in this embodiment, a first adhesion layer 960 can be arranged between the OLED display 910 and the functional touch panel 920, which is similar to the first adhesion layer 400 of the third embodiment, and can improve the OLED display 910 and the functional touch panel 920. Adhesion between functional touch panels 920. In this embodiment, the touch electrode structure 940 is a single-layer electrode structure, but it can also be a double-layer electrode structure as shown in FIG. 3B or a bridge electrode structure as shown in FIG. 3C.

FIG. 9B is a schematic diagram of a touch display panel according to another example of the eighth embodiment. FIG. 9B uses the same reference numerals as those in FIG. 9A to denote the same elements.

In FIG. 9B, a functional film 950, a touch electrode structure 940 and a polyvinylidene fluoride vinyl plate 930 are sequentially arranged on the OLED display 910, so the functional film 950 is fabricated after the touch electrode structure 940. In addition, in the OLED display 910, at least the OLED display element 912 containing organic materials is provided with a sidewall gas barrier (SWB) structure 970, where the sidewall gas barrier structure 970 is, for example, an inverted trapezoid, but the present disclosure does not This is limited. As for the material of the sidewall gas barrier structure 970, for example, organic materials, inorganic materials, or organic-inorganic hybrid materials, or organic-inorganic stacks, in order to achieve, for example, WVTR that can at least block water and oxygen.<img file="TWM472252U_D0003.tif" he="52" img-content="character" img-format="tif" inline="no" orientation="portrait" wi="32" />10^-1g/m²-day, the purpose is to prevent water, oxygen, etc. from infiltrating around the touch display panel 900, resulting in deterioration of the OLED display 910. In this embodiment, the side wall barrier (SWB) structure is arranged around the OLED display element, but the present disclosure is not limited to the OLED display element.

FIG. 9C is a schematic diagram of a touch display panel of another example of the eighth embodiment. The difference between Fig. 9C and Fig. 9A is that there is an extra layer of hard coat (Hard coat) 980, the other The components are the same as the touch display panel 900 of FIG. 9A, so the same component symbols are used to denote the same components. The hard coat layer 980 is disposed on the polyvinylidene fluoride vinyl plate 930, and its material is, for example, epoxy resin or a hardened layer material with acrylic as the base. The function of the hard coat layer 980 is mainly to protect the polyvinylidene fluoride vinyl plate 930 below it, thereby increasing the scratch resistance of the functional touch panel 920.

In this embodiment, the polyvinylidene fluoride sheet 930 is integrated with the OLED display 910 to improve the light transmittance of the touch display panel 900 and make the color shift close to zero. The hydrophobicity of polyvinylidene fluoride can also be used to prevent The problem of deterioration of the OLED display 910 when exposed to water and oxygen.

In summary, the polyvinylidene fluoride in the present disclosure contains relatively low inorganic nano-modified materials and low crystal size, so it has relatively high light transmittance and flexibility. Therefore, the polyvinylidene fluoride sheet of the present disclosure can be integrated with various flexible and rigid displays, thereby improving the light transmittance of the touch element and reducing the color shift of the touch element. In addition, a polyvinylidene fluoride layer with high dielectric constant can be arranged between the polyvinylidene fluoride plate and the touch layer, so it can also be used as the dielectric layer in the touch panel to reduce the driving voltage of the tactile feedback. In order to improve the electrical efficiency of the touch panel.

Although this disclosure has been disclosed in the above embodiments, it is not intended to limit this disclosure. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of this disclosure. Therefore, The scope of protection of this disclosure shall be subject to those defined by the attached patent scope.