TWI507941B - Surface panels with detection capability - Google Patents

Description

Surface panel with detection function

The present invention relates to a surface panel partially used as a casing of a portable device or other electronic device, and more particularly to a detection layer including a decorative layer surrounding the light-transmitting region and a detecting electrode layer disposed on the light-transmitting region Functional surface panel.

The surface panel used as part of the casing of the portable device or other electronic device is formed at a central portion to form a light-transmissive region capable of seeing a display screen of the liquid crystal display device or the like and capable of performing a touch operation by a finger, and A decorative area colored in a frame shape is provided around the light area.

A touch panel module having a transparent touch panel is disclosed below in FIG. 6 of Patent Document 1.

The touch panel module is formed by injection molding to form a transparent panel. A recess is formed on the transparent panel, and a transparent touch panel is inserted and held inside the recess. Moreover, the transparent panel holding the transparent touch panel is held inside the overmolded mold, and the housing of the transparent touch panel is molded by injection molding by IMD (in-mold decoration).

A device having a sensor and a cover is disclosed in Patent Document 2.

The device shown in FIG. 8 is constructed by attaching a touch sensor to a cover via an adhesive. The device shown in Figure 9 sandwiches the touch sensor between the top and bottom covers.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] US Patent Publication 2008/0117186A1

[Patent Document 2] US Patent Publication 2009/0073130A1

The touch panel module disclosed in FIG. 6 of Patent Document 1 has a structure in which a part of the colored housing is not in order to be able to observe the wiring layer or the like of the transparent touch panel held by the transparent panel from the outside. To cover the front of the transparent touch panel. Therefore, the structure of the touch panel module is complicated and the thickness is increased to be more than necessary.

The device described in FIG. 8 of Patent Document 2 has a structure in which a touch sensor is laminated and covers the two layers, and thus deformation or warpage is likely to occur due to a stress difference or a thermal stress difference between the two layers.

The device described in FIG. 9 of Patent Document 2 sandwiches the touch sensor between the top cover and the bottom cover, and thus is less likely to be deformed or warped than the one shown in FIG. However, when the device is used, it is necessary to laminate a film having a decorative portion for hiding wiring of the touch sensor or the like on the surface side. Since the film is laminated and then adhered, deformation or warpage is liable to occur due to a stress difference or a thermal stress difference in the subsequent state.

Further, the device described in Patent Document 2 has a joint portion between the touch sensor and the cover on the end surface thereof, so that moisture or corrosive gas or the like easily penetrates into the electrode portion of the touch sensor, and the environmental resistance is poor. Life expectancy is reduced.

The present invention has been made in view of the above-mentioned problems, and an object of the invention is to provide a surface panel having a detection function which can be formed into a thin shape and which is less likely to be deformed and which is excellent in environmental resistance.

The invention relates to a surface panel having a detecting function, which has a light transmitting region and a decorative region surrounding the light transmitting region, and is characterized in that: a substrate having a light transmissive property of an outer surface and an inner surface; a decorative layer formed on the outer surface of the substrate to form the decorative region, and a transmissive detecting electrode layer disposed on the inner surface and located in the transparent region; and a translucent synthetic resin material Forming and covering the outer surface forming body of the outer surface of the substrate and the inner molded body covering the inner surface of the substrate; and both the surface of the outer molded body and the surface of the inner molded body are covered with a surface protective layer .

The surface panel having the detecting function of the present invention has a structure in which a substrate having a decorative layer and a detecting electrode layer is sandwiched between the outer molded body and the inner molded body. Further, a surface protective layer as a hard coat layer is provided on the surface of the outer molded body so that the surface of the outer molded body is less likely to be damaged and the fingers or the like are directly contacted for easy handling, and the surface protective layer is provided on the surface and the inner side of the outer molded body. Both of the surfaces of the shaped body.

As a result, the laminated structure is basically symmetrical on the outer side and the inner side via the center of the substrate, and the stress difference in the laminating step of each layer or the stress difference due to the thermal change is easily balanced on the outer side and the inner side, so that the panel is less likely to be deformed. Or warp.

The outer molded body and the inner molded body may be formed of the same material and the same thickness, but the thicknesses may be different from each other or the materials may be different, so that the stress difference may be further reduced from the outer side and the inner side with respect to the substrate.

Further, the base material and the outer molded body, and the base material and the inner molded body may be integrated in the molding step, but the preformed outer side molded body and the inner molded body and the base material may be passed through the light transmissive property. The agent continues to grow.

In the present invention, it is preferable that the end surface of the outer molded body and the end portion of the inner molded body and the end surface of the base material are covered by the surface protective layer.

When a part of the substrate extends from the panel end to the outside, the end surface of the panel is covered by the surface protection layer except for the portion from which the substrate extends. Cover construction.

Furthermore, in the above-described panel end surface, at least one of the surface protective layers may penetrate into at least one of a gap between the base material and the outer molded body and a gap between the base material and the inner molded body.

As described above, by covering the end surface of the panel with the surface protective layer, moisture or corrosive gas does not easily penetrate into the gap between the substrate and the outer molded body which are present on the end surface of the panel, or the gap between the substrate and the inner molded body, and is excellent in environmental resistance.

In the present invention, the substrate is a synthetic resin film. For example, the substrate is a PET (Polyethylene Terephthalate) film, and the outer molded body and the inner molding system are formed of an acrylic resin.

In this case, a bonding layer is provided on both the boundary portion between the base material and the outer molded body and the boundary portion between the base material and the inner molded body.

Further, the decorative layer may be formed on the surface of the bonding layer.

In the surface panel of the present invention, since the outer layer and the inner layered structure are substantially symmetrical around the base material, deformation or warpage is less likely to occur. Further, since the surface of the outer molded body is covered with the surface protective layer, it is less likely to be damaged and is easily handled by a finger or the like.

Further, by providing the surface protective layer on the end surface of the panel, the surface of the substrate can be protected from moisture or corrosive gas, and the environmental resistance can be improved.

1‧‧‧Surface panel

1a‧‧‧Outer surface of the panel

1b‧‧‧ panel inner surface

1c‧‧‧ faceplate end face

2‧‧‧ frame

2a‧‧‧ surface

3‧‧‧Lighting area

4‧‧‧Decorative area

11‧‧‧Base film

11a‧‧‧Outer surface

11b‧‧‧ inner surface

12‧‧‧Outer molded body

13‧‧‧Inside molded body

14‧‧‧Outer joint layer

15‧‧‧Inside joint layer

16‧‧‧Wiring tape

16b‧‧‧ inner surface

21‧‧‧Detection electrode layer

21a‧‧‧Right electrode

21b‧‧‧Left electrode

22‧‧‧Wiring layer

22a‧‧‧Right wiring layer

22b‧‧‧Left wiring layer

23‧‧‧Decorative layer

24‧‧‧Leading wiring layer

25‧‧‧Connector electrodes

26‧‧‧Organic insulation

28‧‧‧Surface protection layer

30‧‧‧ sign display

31‧‧‧reflective layer

32‧‧‧Organic insulation

33‧‧‧Transmission Department

41a‧‧‧One forming mould

41b‧‧‧One forming mould

42‧‧‧ cavity

43a‧‧‧Secondary forming mould

43b‧‧‧Secondary forming mould

44‧‧‧ cavity

101‧‧‧Surface panel

101a‧‧‧ panel outer surface

101b‧‧‧ panel inner surface

101c‧‧‧ faceplate end face

201‧‧‧Surface panel

201a‧‧‧ panel outer surface

201b‧‧‧ panel inner surface

201c‧‧‧ panel end face

201d‧‧‧Face bending

Fig. 1 is a perspective view showing a surface panel according to a first embodiment of the present invention.

Figure 2 is a cross-sectional view taken along line II-II of the surface panel shown in Figure 1.

Fig. 3 is a plan view showing, in perspective, a pattern of a detecting electrode layer and a wiring layer provided on an inner surface of a surface panel.

4(A) and 4(B) are explanatory views showing an example of a step of laminating a surface panel.

Fig. 5 is a cross-sectional view showing a surface panel according to a second embodiment of the present invention.

Fig. 6 is a cross-sectional view showing a surface panel according to a third embodiment of the present invention.

The surface panel 1 of the first embodiment shown in Figs. 1 and 2 is used as a part of a portable device or a casing of an electronic device such as a mobile phone or a personal digital assistant.

The surface panel 1 of the first embodiment has a flat structure and a planar shape in a rectangular shape. The surface panel 1 is disposed on the surface 2a of the casing 2 of the portable device or electronic device. Inside the casing 2, a circuit board on which various electronic circuits are mounted and a display device are incorporated. The display device is a color liquid crystal display device or an organic electroluminescence display device.

The front panel 1 has a light-transmitting region 3 through which light can pass, and a decorative region 4 surrounding the light-transmitting region 3. The display content of the screen of the display device can be visually viewed from the outside through the light transmitting region 3.

The laminated structure of the surface panel 1 is shown in FIG.

The surface panel 1 has a substrate film 11. The base film 11 has light transmissivity. The light transmittance in the present specification means a light transmittance which is capable of seeing the display content of the display device, for example, the total light transmittance is 80% or more, preferably 90% or more.

The base film 11 is formed of PET (polyethylene terephthalate) which is a synthetic resin having a strength and heat resistance suitable for forming a touch sensor. Alternatively, COP (Cyclo Olefin Polymers) or the like can be used.

The base film 11 has an outer surface 11a facing the outer side of the frame 2 and an inner surface 11b facing the inside of the frame 2. As shown in FIG. 2, the outer molded body 12 is joined to the outer surface 11a of the base film 11, and the inner molded body 13 is joined to the inner surface 11b.

The outer molded body 12 and the inner molded body 13 are made of a translucent acrylic resin or the like, and are formed of, for example, PMMA (poly(methyl methacrylate), polymethyl methacrylate).

If the base film 11 is formed of PET or COP, the outer molded body 12 and the inner molded body In the combination of the materials formed of PMMA, the bonding property between the base film 11 and the outer molded body 12 and the inner molded body 13 is unsatisfactory. Therefore, in the surface panel 1, the outer surface 11a of the base film 11 and the outer molded body 12 are joined via the outer joint layer 14, and the inner surface 11b and the inner molded body 13 are joined via the inner joint layer 15. The outer bonding layer 14 and the inner bonding layer 15 are translucent acrylic resin layers. This resin layer is formed by applying a molten resin to the outer surface 11a and the inner surface 11b and hardening it by thermosetting or ultraviolet curing.

As shown in FIG. 2, a detecting electrode layer 21 and a plurality of wiring layers 22 are formed on the inner surface 11b of the base film 11.

In FIG. 3, the detection electrode layer 21 and the wiring layer 22 formed on the inner surface 11b of the base film 11 are seen from the outer surface 11a side.

The detecting electrode layer 21 is disposed on the light transmitting region 3 of the surface panel 1. As shown in FIG. 3, the detecting electrode layer 21 is divided into a right electrode 21a and a left electrode 21b. Each of the right electrode 21a and the left electrode 21b is provided with a plurality of layers, and is formed alternately in the longitudinal direction of the surface panel 1 (the vertical direction in the drawing of FIG. 3). The detecting electrode layer 21 is formed of ITO (Indium Tin Oxide). After the detection electrode layer 21 is formed on the inner surface 11b of the base film 11 such as PET, it is separated into the right electrode 21a and the left electrode 21b by etching.

As shown in FIG. 3, the wiring layer 22 has a right wiring layer 22a continuous with the right electrode 21a and a left wiring layer 22b continuous with the left electrode 21b. The right wiring layer 22a and the left wiring layer 22b pass around the inside of the decorative region 4 and wrap around. As shown in FIG. 3, the right wiring layer 22a and the left wiring layer 22b extend to the upper region of the decorative region 4 and are arranged in parallel to form the lead wiring layer 24.

The inner bonding layer 15 is formed to cover the detecting electrode layer 21 and the wiring layer 22.

As shown in FIGS. 1 and 2, a wiring tape 16 continuous in a strip shape from the upper end thereof is integrally formed on the base film 11, and the lead wiring layer 24 is formed along the wiring tape 16.

The right wiring layer 22a and the left wiring layer 22b and the lead wiring layer 24 are adhesive trees The grease contains an organic conductive layer of a low-resistance conductor such as silver paste, copper paste or carbon paste. The organic conductive layer in which the right wiring layer 22a, the left wiring layer 22b, and the lead wiring layer 24 are formed is more flexible than the ITO in which the detecting electrode layer 21 is formed. That is, the elongation or bending rate with respect to the same load is higher than that of ITO.

In the step of forming the right wiring layer 22a, the left wiring layer 22b, and the lead wiring layer 24, an organic conductive layer is formed on the ITO layer formed on the inner surface 11b of the base film 11, and a detecting electrode layer is formed by an etching step. 21. Pattern of the right wiring layer 22a, the left wiring layer 22b, and the lead wiring layer 24. Thereafter, the organic conductive layer on the surface of the detecting electrode layer 21 is removed by an etching step.

Alternatively, the right wiring layer 22a, the left wiring layer 22b, and the lead wiring layer 24 may be formed in the printing step by using the organic conductive layer.

As shown in FIG. 2, on the outer surface 11a of the base film 11, a decorative layer 23 is formed on the surface of the outer joint layer 14. The decorative layer 23 is formed by forming a coloring coating film in a plurality of layers in the printing step. As shown in FIGS. 1 and 2, the decorative region 4 surrounding the light-transmitting region 3 is formed by the decorative layer 23.

As shown in FIG. 1, a logo display portion 30 is provided in one of the decorative regions 4. As shown in FIG. 2, on the indicator display portion 30, a reflective layer 31 is provided on the inner surface 11b of the base film 11. The reflective layer 31 is formed on the inner surface 11b by printing a coating film containing metal powder, or by sputtering a metal layer or the like. The portion where the reflective layer 31 is formed is covered with the organic insulating layer 32, and the lead wiring layer 24 is formed on the surface of the organic insulating layer 32.

In the mark display portion 30, a transmissive portion 33 is formed in one portion of the decorative layer 23. The transmissive portion 33 is formed by removing a portion of the decorative layer 23 or by partially reducing the number of layers of the color coating film applied to the plurality of layers. The transmissive portion 33 is formed to be a logo pattern indicating a character or symbol such as a product name or a manufacturer's name or model number, or a combination thereof. In the sign display portion 30, in one of the decorative regions 4, it is possible to visually view the gold in a three-dimensional display. The color of the logo pattern.

As shown in FIG. 2, the lead wiring layer 24 having a plurality of wiring patterns extends along the inner surface 16b of the wiring tape 16, and a connector electrode which is individually electrically connected to each wiring pattern of the lead wiring layer 24 is formed in front of the wiring tape 16. 25. Further, the lead wiring layer 24 formed on the inner surface 16b of the wiring tape 16 is covered by the organic insulating layer 26.

As shown in Fig. 2, the surface panel 1 is attached to the outer surface 1a of the panel, and the surface of the outer molded body 12 is covered with a surface protective layer 28, and the surface of the inner molded body 13 is covered by the surface protective layer 28 on the inner surface 1b of the panel. Further, all of the panel end faces 1c on the four sides of the front panel 1 are covered by the surface protective layer 28. The wiring tape 16 as a part of the base film 11 is extended from one of the four end faces 1c of the four sides, but the face end face 1c is covered with the surface protective layer 28 except for the portion from which the wiring tape 16 extends.

The surface protective layer 28 is referred to as a hard coat, and has a surface hardness higher than that of the base film 11 and the outer molded body 12 and the inner molded body 13, and is, for example, about 3 H to 5 H in terms of pencil hardness. The surface protective layer 28 is formed of an ultraviolet curable resin material mainly composed of an acrylic, an anthrone or a fluorine.

The surface protective layer 28 as the hard coat layer may be formed only on the panel outer surface 1a of the surface panel 1, but in the present invention, not only the panel outer surface 1a, but also the entire surface of the panel inner surface 1b and the panel end surface 1c are surfaced. The protective layer 28 is covered.

An example of a method of manufacturing the above-described surface panel 1 is shown in FIG.

In the manufacturing step, the detecting electrode layer 21, the reflective layer 31, the organic insulating layer 32, the wiring layer 22, and the lead wiring layer 24 are formed on the inner surface 11b of the base film 11 such as a PET film, and the inner bonding layer 15 is further formed. Further, the outer bonding layer 14 and the decorative layer 23 are formed on the outer surface 11a of the base film 11.

As shown in FIG. 4(A), the base film 11 on which the above layers are formed is placed inside the primary molding dies 41a and 41b, and the cavity 42 is formed on the inner surface 11b side of the base film 11. A synthetic resin material having good optical properties such as PMMA is emitted to the cavity 42 in a molten state. Inside, the inner molded body 13 is formed. The base film 11 such as PET and the inner molded body 13 such as PMMA are firmly adhered to each other by the inner joint layer 15 .

As shown in Fig. 4(B), the base film 11 and the inner molded body 13 having the respective layers are integrally formed in the secondary molding dies 43a and 43b, and are formed on the outer surface 11a side of the base film 11. Cavity 44. A synthetic resin material having good optical properties such as PMMA is emitted into the cavity 44 in a molten state to form the outer molded body 12. The base film 11 such as PET and the outer molded body 12 such as PMMA are firmly adhered to each other by sandwiching the outer joint layer 14.

Thereafter, a surface protective layer 28 as a hard coat layer is formed on the panel outer surface 1a, the panel inner surface 1b, and the panel end surface 1c. In the coating step of the surface protective layer 28, the base film 11 having the respective layers is integrally formed with the outer molded body 12 and the inner molded body 13, and is immersed in the ultraviolet curable molten resin inside the protruding portion of the wiring tape 16. The surface is coated with a molten resin. Thereafter, the ultraviolet resin is irradiated to harden the molten resin to form the surface protective layer 28.

Further, contrary to the step of FIG. 4, the outer molded body 12 may be molded first with respect to the base film 11 having the respective layers, and then the inner molded body 13 may be molded to form the base film 11 and the outer molded body 12 and the inner molded body. 13 integration.

Further, as the method of manufacturing the surface panel 1, the outer molded body 12 and the inner molded body 13 may be formed in advance, and the base film 11 having the respective layers, the outer molded body 12, and the inner molded body 13 may be mutually adhered by an adhesive or the like. Thereafter, the panel outer surface 1a and the panel inner surface 1b and the panel end surface 1c are covered by the surface protective layer 28.

In the surface panel 1 shown in FIG. 2, the outer joint layer 14 and the outer molded body 12 and the surface protective layer 28 are laminated on the outer side, and the inner joint layer 15 and the inner molded body 13 are laminated on the inner side. The surface protective layer 28 has a symmetrical structure on the outer side and the inner side. Therefore, the stress difference acting on the outer side and the inner side or the stress difference due to the temperature change becomes extremely small. Therefore, deformation or warpage is less likely to occur.

Further, the detecting electrode layer 21 and the decorative layer 23 are thinner than the bonding layers 14 and 15 and the molded bodies 12 and 13, and have little influence on deformation or warpage.

In the surface panel 1, the molded bodies 12, 13 are respectively joined to the outer side and the inner side of the base film 11, and the surface protective layer 28 as a hard coat layer previously formed only on the outer surface 1a of the panel is formed on the outer surface 1a of the panel. Both of the inner surfaces 1b of the panel are structured to easily prevent deformation or warpage caused by joint stress or thermal stress.

Further, by making the outer molded body 12 and the inner molded body 13 have thickness difference and adjusting the thickness difference, the stress difference between the outer side and the inner side centering on the base film 11 can be further offset or reduced.

As shown in FIG. 2, all of the panel end faces 1c of the four sides of the surface panel 1 are covered by the surface protective layer 28 as a hard coat layer. An end portion of the joint portion between the base film 11 and the outer molded body 12 and an end portion of the joint portion of the base film 11 and the inner molded body 13 are present on the panel end surface 1c, but the ends of the joint portions are surface-protected The cover is 28, so that it is possible to effectively prevent penetration of moisture or penetration of corrosive gas along the outer surface 11a or the inner surface 11b of the base film 11.

Further, in the molding step shown in Fig. 4, the end portion of the joint portion between the base film 11 and the outer molded body 12 and the end portion of the joint portion between the base film 11 and the inner molded body 13 are defective in molding. The fine gap caused by the penetration of the surface protective layer 28 into the gap and hardening thereof can effectively prevent moisture or the like from infiltrating along the base film 11.

Therefore, the detection electrode layer 21 and the wiring layer 22 can be always protected, and water resistance and environmental resistance are improved, and the surface panel 1 having a long life can be formed.

As shown in FIG. 1 , in the portable device using the surface panel 1 , the display screen of the display device disposed inside the frame 2 faces the inner side of the transparent region 3 and is transparent to the transparent surface panel 1 . The light transmissive area 3 visually displays the content.

Further, when the finger contacts the surface protective layer 28 on the surface of the outer-side molded body 12 in the light-transmitting region 3 of the display screen, the detection output changes depending on the electrostatic capacitance between the finger and any of the detecting electrode layers 21, and It is possible to detect which position of the light-transmitting region 3 the finger is in contact with.

Fig. 5 shows a surface panel 101 according to a second embodiment of the present invention. The surface panel 101 is a modification of the first embodiment shown in Fig. 2 .

In the surface panel 101 shown in FIG. 5, the base film 11 is, for example, an acrylic resin film, and has good adhesion to the PMMA outer side molded body 12 and the inner molded body 13. Therefore, the outer side joining layer 14 and the inner side joining layer 15 shown in Fig. 2 are not provided. Therefore, the decorative layer 23 is directly formed on the outer surface 11a of the base film 11 by a printing step or the like.

The surface panel 101 shown in FIG. 5 is also symmetrical about the base film 11 and has a structure in which the outer layer and the inner layer are laminated, and is not easily deformed or warped. Further, the panel outer surface 101a, the panel inner surface 101b, and the entire panel end surface 101c are covered with the surface protective layer 28, and are excellent in environmental resistance.

Fig. 6 shows a surface panel 201 according to a second embodiment of the present invention. In the embodiment, members having the same functions as those of the surface panel 1 of the first embodiment will be described with the same reference numerals.

In the surface panel 201 shown in FIG. 6, the detecting electrode layer 21, the wiring layer, and the like are formed on the inner surface 11b of the base film 11, and the inner bonding layer 15 is formed thereon. The outer bonding layer 14 is formed on the outer surface 11a of the base film 11, and a decorative layer 23 is formed on the surface thereof.

Further, the outer molded body 12 and the inner molded body 13 are formed by the same steps as those shown in Fig. 4 . In the molding step, the panel outer surface 201a and the panel inner surface 201b are formed on the surface panel 201, and the panel curved portion 201d is formed on the four sides or the two sides, and the surface panel 201 has a three-dimensional shape. As a result, the panel end surface 201c faces downward in the drawing. The decorative layer 23 is provided from the periphery of the panel outer surface 201a to the panel curved portion 201d.

Further, the front surface of the panel outer surface 201a, the panel inner surface 201b, the panel curved portion 201d, and the panel end surface 201c are covered by the surface protective layer 28. The surface panel 201 is used as one of the front sides of a casing of a portable electronic device or the like.

Further, as shown in FIG. 6, the detecting electrode layer 51 may be further provided inside the panel curved portion 201d, and a side sensor that detects the contact of the finger at the side portion may be formed.

Moreover, the surface panel of the present invention is not limited to the portable one used in the above embodiment. The outer casing of the device can also be used as part of the outer casing of a remote control or other electronic device for operating various electrical products.

1‧‧‧Surface panel

1a‧‧‧Outer surface of the panel

1b‧‧‧ panel inner surface

1c‧‧‧ faceplate end face

3‧‧‧Lighting area

4‧‧‧Decorative area

11‧‧‧Base film

11a‧‧‧Outer surface

11b‧‧‧ inner surface

12‧‧‧Outer molded body

13‧‧‧Inside molded body

14‧‧‧Outer joint layer

15‧‧‧Inside joint layer

16‧‧‧Wiring tape

16b‧‧‧ inner surface

21‧‧‧Detection electrode layer

22‧‧‧Wiring layer

23‧‧‧Decorative layer

24‧‧‧Leading wiring layer

25‧‧‧Connector electrodes

26‧‧‧Organic insulation

28‧‧‧Surface protection layer

30‧‧‧ sign display

31‧‧‧reflective layer

32‧‧‧Organic insulation

33‧‧‧Transmission Department

Claims (8)

A surface panel having a detecting function, comprising: a light transmitting region and a decorative region surrounding the light transmitting region, comprising: a substrate having a light transmissive property of an outer surface and an inner surface; and being disposed on the substrate a decorative layer forming the decorative region on the outer surface; and a transmissive detecting electrode layer disposed on the inner surface and located in the transparent region; and each formed of a translucent synthetic resin material and covering the substrate The outer surface outer side molding body and the inner side molding body covering the inner surface of the base material; and the surface of the outer side molding body and the surface of the inner side molding body are covered by a surface protective layer; The end portion of the body and the end portion of the inner molded body and the end surface of the substrate are covered by the surface protective layer; a portion of the substrate extends outward from the panel end surface, and the substrate extends In addition to the portion, the end face of the panel is covered by the surface protective layer. A surface panel having a detecting function according to claim 1, wherein one of the surface protective layers penetrates into a gap between the substrate and the outer molded body and at least a gap between the substrate and the inner molded body on the end surface of the panel One. A surface panel having a detecting function according to claim 1 or 2, wherein the substrate is a synthetic resin film. A surface panel having a detecting function according to claim 3, wherein a bonding layer is provided at both a boundary portion between the base material and the outer molded body and a boundary portion between the base material and the inner molded body. A surface panel having a detecting function according to claim 4, wherein the decorative layer is formed on The surface of the above bonding layer. A surface panel having a detecting function according to claim 4, wherein the substrate is a PET film, and the outer molded body and the inner molded body are formed of an acrylic resin. A surface panel having a detecting function according to claim 5, wherein the substrate is a PET film, and the outer molded body and the inner molded body are formed of an acrylic resin. The surface panel according to claim 3, wherein the substrate is an acrylic resin film, and the outer molded body and the inner molded body are formed of PMMA, and the base material, the outer molded body, and the inner molded body are directly Engage.