JP3212491U - Panel cover sheet - Google Patents

Abstract

A panel cover sheet that can cope with diversification of the shape of a display panel is provided. A panel cover sheet 10 mounted on the surface of a display panel in an information display device, wherein a surface of the panel cover sheet 10 facing the display panel is a lower surface, and a surface opposite to the lower surface is an upper surface. When forming a window frame W that forms a window W inside, a window frame that forms a window W inside, a decoration layer 110 is formed on the upper surface, Is surrounded by the first transparent adhesive layer 120 and the first transparent adhesive layer 120 that covers the upper surface of the decorative layer 110 and is surrounded by the decorative layer 110. The second transparent adhesive layer 130 is formed so as to fill the window portion W and has a lower surface that has a flexibility to be an adhesive surface to the display panel. [Selection] Figure 1

Description

  The present invention relates to a panel cover sheet suitable as a cover sheet for a display panel such as an information display device.

  A panel cover sheet with a window frame-like decoration layer formed on the edge is the cover sheet for display panels (for example, liquid crystal panels) of information display devices such as smart phones, tablet terminals, and in-vehicle center consoles. It is common to be mounted as. Various panel cover sheets have been proposed (see, for example, Patent Document 1). In Patent Document 1, the panel cover sheet is referred to as a “cover film”, but in this specification, the panel cover sheet is described as a “panel cover sheet”.

  FIG. 20 is a view for explaining the panel cover sheet 900 described in Patent Document 1. In FIG. A panel cover sheet 900 described in Patent Document 1 includes a base material film 910, a window frame-shaped decoration layer 920 formed on the base film 910, and a base material surrounded by the decoration layer 920. A hard coat layer 930 embedded on the film 910.

  In the panel cover sheet 900 described in Patent Document 1, the decorative layer 920 is formed by stacking three decorative layers 920a, 920b, and 920c, and these three decorative layers 920a, 920b, 920c is formed by repeating the printing process three times. Further, the hard coat layer 930 serves to fill a step between the decorative layer 920 and the base film 910, that is, a window portion, and the hard coat is, for example, cured containing an ionizing radiation curable compound. It is formed by applying a sextype composition or the like on a base film 910 surrounded by a decorative layer 920 and then curing it by irradiation with ionizing radiation.

JP 2014-35493 A

  In the panel cover sheet 900 described in Patent Document 1, the layer for filling the window portion between the decorative layer 920 and the base film 910 is the hard coat layer 930. There is no flexibility and no flexibility. For this reason, since the panel cover sheet 900 cannot be used for a panel having a curved surface or the like, there is a problem that it cannot cope with diversification of the shape of the panel.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a panel cover sheet that can cope with diversification of the shape of a display panel.

  [1] A panel cover sheet of the present invention (referred to as a first panel cover sheet of the present invention) is a panel cover sheet to be mounted on the surface of a display panel in an information display device, When the surface facing the display panel is the lower surface and the surface opposite to the lower surface is the upper surface, a decorative layer that forms a window frame that forms a window on the inside, and a window frame that forms a window on the inside The decorative layer is formed on the upper surface, and the lower surface covers the upper surface of the decorative layer while covering the upper surface of the decorative layer and the first transparent pressure-sensitive adhesive layer having a flexibility to be an adhesive surface to the display panel. A second transparent pressure-sensitive adhesive layer that is formed so as to fill a window portion surrounded by a decorative layer and a window portion surrounded by the first transparent pressure-sensitive adhesive layer, and has a flexibility that the lower surface serves as an adhesive surface to the display panel; It is characterized by providing.

  [2] A panel cover sheet of the present invention (referred to as a second panel cover sheet of the present invention) is a panel cover sheet to be mounted on the surface of a display panel in an information display device, When the surface facing the display panel is the lower surface and the surface opposite to the lower surface is the upper surface, a decorative layer that forms a window frame that forms a window on the inside, and a window frame that forms a window on the inside A film member made of a synthetic resin having the decorative layer formed on the upper surface and a window frame shape forming a window portion on the inner surface, the upper surface being bonded to the lower surface of the film member, A first transparent adhesive layer having flexibility to be an adhesive surface to the display panel, a window portion covering the upper surface of the decorative layer and surrounded by the decorative layer, a window portion surrounded by the film member, and Window portion surrounded by the first transparent adhesive layer Is formed so as to fill, characterized in that it comprises a second transparent adhesive layer having flexibility lower surface becomes adhesive surface to the display panel.

  [3] In the first panel cover sheet of the present invention and the second panel cover sheet of the present invention, the second transparent adhesive layer has a viscous liquid transparent adhesive that retains flexibility and adhesiveness. It is hardened in the state.

  [4] In the first panel cover sheet of the present invention and the second panel cover sheet of the present invention, a release film on the lower surface side is formed on the lower surface of the first transparent adhesive layer and the lower surface of the second transparent adhesive layer. It is preferable that a release film on the upper surface side is attached to the upper surface of the second transparent adhesive layer.

  [5] A panel cover sheet of the present invention (referred to as a third panel cover sheet of the present invention) is a panel cover sheet attached to the surface of a display panel in an information display device, When the surface facing the display panel is the lower surface and the surface opposite to the lower surface is the upper surface, a decorative layer that forms a window frame that forms a window portion on the inside, and the decorative layer is formed on the upper surface A transparent film member made of a transparent synthetic resin provided so as to cover the decorative layer and the window portion from the lower surface side, and a window portion that covers the upper surface of the decorative layer and is surrounded by the decorative layer And a transparent adhesive layer having flexibility that is formed so as to be embedded.

  [6] In the third panel cover sheet of the present invention, the transparent adhesive layer is obtained by curing a viscous liquid transparent adhesive while maintaining flexibility and adhesiveness.

  [7] In the third panel cover sheet of the present invention, it is preferable that a release film on the upper surface side is attached to the upper surface of the transparent adhesive layer.

  [8] In the third panel cover sheet of the present invention, on the lower surface of the transparent film member, a transparent adhesive layer for adhering a display panel having the flexibility that the lower surface becomes an adhesive surface to the display panel is formed. It is also preferable.

  [9] In the third panel cover sheet of the present invention, it is preferable that a release film on the lower surface side is attached to the lower surface of the transparent adhesive layer for bonding the display panel.

  [10] In the first panel cover sheet of the present invention, the second panel cover sheet of the present invention, and the third panel cover sheet of the present invention, the decorative layer is preferably made of colored ink.

  [11] In the first panel cover sheet of the present invention, the second panel cover sheet of the present invention, and the third panel cover sheet of the present invention, the decorative layer is also preferably made of a colored synthetic resin. .

According to the first panel cover sheet of the present invention, since the entire panel cover sheet has a flexible structure, it can be used not only for flat display panels but also for curved display panels. Yes, it can cope with diversification of display panel shapes.
Also, the second panel cover sheet of the present invention and the third panel cover sheet of the present invention can provide the same effects as the first panel cover sheet of the present invention. In particular, in the third panel cover sheet of the present invention, a transparent film member made of a transparent synthetic resin is provided so as to cover the decorative layer and the window from the lower surface side. The sheet can be molded so as to conform to the shape of a member (for example, a cover glass that protects the display panel) to be mounted on the sheet. For this reason, since the 3rd panel cover sheet | seat of this invention can be mounted | worn with the member used as the said mounting object in the state shape | molded in the shape of the member used as mounting | wearing object, mounting work can be made efficient. .

  In this specification, “transparent” of the transparent adhesive layer means that it is colorless and transparent, each color of red (R), green (G), blue (B), RGB mixed color or gray color. It is assumed that it is a generic term for the colored transparency that it has. In addition, when a transparent adhesive layer is colored, it is preferable to have the transparency which can confirm the display content currently displayed on the panel through the panel cover sheet of this invention appropriately.

It is a figure shown in order to demonstrate the panel cover sheet 10 which concerns on Embodiment 1. FIG. 2 is a cross-sectional view illustrating a state where release films 140 and 150 are attached to the lower and upper surfaces of the panel cover sheet 10. FIG. It is a figure shown in order to demonstrate the panel cover sheet manufacturing apparatus 500 which concerns on Embodiment 1. FIG. It is a figure shown in order to demonstrate the manufacturing process of the first half part among the manufacturing processes of the panel cover sheet 10 by the panel cover sheet manufacturing apparatus 500 which concerns on Embodiment 1. FIG. It is a figure shown in order to demonstrate the manufacturing process of the second half part among the manufacturing processes of the panel cover sheet 10 by the panel cover sheet manufacturing apparatus 500 which concerns on Embodiment 1. FIG. It is a figure which shows typically the usage example of the panel cover sheet 10 which concerns on Embodiment 1. FIG. It is a figure shown in order to demonstrate the panel cover sheet 20 which concerns on Embodiment 2. FIG. 4 is a cross-sectional view illustrating a state where release films 140 and 150 are attached to the lower and upper surfaces of the panel cover sheet 20. FIG. It is a figure shown in order to demonstrate the panel cover sheet manufacturing apparatus 600 which concerns on Embodiment 2. FIG. It is a figure shown in order to demonstrate the manufacturing process of the first half part among the manufacturing processes of the panel cover sheet 10 by the panel cover sheet manufacturing apparatus 600 which concerns on Embodiment 2. FIG. It is a figure shown in order to demonstrate the manufacturing process of the latter half part among the manufacturing processes of the panel cover sheet 10 by the panel cover sheet manufacturing apparatus 600 which concerns on Embodiment 2. FIG. It is a figure shown in order to demonstrate the panel cover sheet 30 which concerns on Embodiment 3. FIG. It is sectional drawing which shows the state by which the peeling film 190 was stuck on the upper surface of the panel cover sheet 30. It is a figure shown in order to demonstrate the panel cover sheet manufacturing apparatus 700 which concerns on Embodiment 3. FIG. It is a figure shown in order to demonstrate the manufacturing process of the panel cover sheet 30 by the panel cover sheet manufacturing apparatus 700 which concerns on Embodiment 3. FIG. It is a figure which shows the elongate sheet | seat 730 as an initial member used when manufacturing the panel cover sheet | seat 40 as a modification of the panel cover sheet | seat which concerns on Embodiment 3. FIG. It is a figure shown in order to demonstrate the panel cover sheet 40 as a modification of the panel cover sheet which concerns on Embodiment 3. FIG. It is a figure shown in order to demonstrate the case where the panel cover sheet 40 is shape | molded in the shape which follows the shape of a cover glass. It is a figure explaining the case where the panel cover sheet | seat 40 is mounted | worn with a cover glass and a liquid crystal panel. It is a figure shown in order to demonstrate the panel cover sheet 900 described in patent document 1. FIG.

  Hereinafter, embodiments of the present invention will be described.

[Embodiment 1]
FIG. 1 is a view for explaining a panel cover sheet 10 according to the first embodiment. 1 is a diagram schematically showing the configuration of the panel cover sheet 10, FIG. 1 (a) is a plan view, and FIG. 1 (b) is a cross-sectional view taken along the line aa in FIG. 1 (a). It is. In addition, since each figure which shows the panel cover sheet 10 concerning Embodiment 1 is a schematic diagram, thickness etc. are exaggerated and drawn.

  Here, the surface of the panel cover sheet 10 facing the display panel will be described as a lower surface, and the surface opposite to the lower surface will be described as an upper surface. Similarly, not only in the panel cover sheet 10, but also in each component constituting the panel cover sheet 10, in each component, the surface facing the display panel is defined as the lower surface, and the surface opposite to the lower surface. Is described as a top surface. Moreover, it shall be applied also to the panel cover sheet 20 which concerns on Embodiment 2 mentioned later.

  As shown in FIG. 1, the panel cover sheet 10 according to Embodiment 1 has a decorative layer 110 that forms a window frame that forms a window W inside, and a window frame that forms a window W inside. The decorative layer 110 is formed on the upper surface, and the first transparent adhesive layer 120 having the flexibility that the lower surface serves as an adhesive surface to the display panel (not shown in FIG. 1), and the decorative layer 110 It is formed so as to cover the upper surface and fill the window W surrounded by the decorative layer 110 and the window W surrounded by the first transparent adhesive layer 120, and the lower surface has flexibility to be an adhesive surface to the display panel. And a second transparent adhesive layer 130.

  As shown in FIG. 1, the panel cover sheet 10 according to the first embodiment has a flat surface without a step on the lower surfaces (adhesion surfaces to the display panel) of the first transparent adhesive layer 120 and the second transparent adhesive layer 130. In addition, the upper surface of the second transparent adhesive layer 130 is also a flat surface without a step.

  The first transparent pressure-sensitive adhesive layer 120 is formed of a flexible transparent pressure-sensitive adhesive sheet formed by a pressure-sensitive adhesive without the presence of a base material. As such a sheet, an OCA sheet (optical transparent pressure-sensitive adhesive sheet) is used. Can be used. Such an OCA sheet can be formed of, for example, an acrylic adhesive or a urethane adhesive.

  On the other hand, the second transparent adhesive layer 130, for example, after applying a viscous liquid transparent adhesive (for example, UV adhesive) and then applying ultraviolet (UV) irradiation, the flexibility of the applied transparent adhesive and It can form by hardening the said transparent adhesive in the state which hold | maintained adhesiveness.

  The second transparent adhesive layer 130 is preferably colorless and transparent. However, the second transparent adhesive layer 130 should have transparency that allows the content displayed on the display panel to be clearly visually recognized through the panel cover sheet 10 according to the first embodiment. For example, each color of red (R), green (G), and blue (B), a mixed color of RGB, or a gray color may be included.

  FIG. 2 is a cross-sectional view illustrating a state where release films 140 and 150 are attached to the lower and upper surfaces of the panel cover sheet 10. In the panel cover sheet 10 shown in FIG. 1, a state in which the release film 140 and the release film 150 are peeled off is shown. At the stage where the panel cover sheet 10 is manufactured, the first transparent adhesive layer 120 is A release film 140 is attached to the lower surface, and a release film 150 is also attached to the upper surface of the second transparent adhesive layer 130. And when attaching the said panel cover sheet | seat 10 to a display panel, it is set as the state which peeled off the peeling films 140 and 150. FIG. Note that the release film 140 may be expressed as a release film 140 on the lower surface side, and the release film 150 may be expressed as the release film 150 on the upper surface side.

  As described above, since the release films 140 and 150 are attached to the lower surface and the upper surface of the panel cover sheet 10, dust or the like does not adhere to the first transparent adhesive layer 120 and the second transparent adhesive layer 130. The adhesive surfaces of the first transparent adhesive layer 120 and the second transparent adhesive layer 130 can be maintained in an appropriate state for a long time.

  The panel cover sheet 10 according to the first embodiment has a configuration in which the entire panel cover sheet 10 has flexibility. For this reason, compared with the panel cover sheet (for example, refer FIG. 20) whose transparent adhesive layer is a hard-coat layer, the panel cover sheet 10 which concerns on Embodiment 1 has the panel cover sheet 10 whole flexibility. Therefore, it can be used not only for a flat display panel but also for a display panel having a curved surface, and can cope with diversification of the shape of the display panel.

  Further, in the panel cover sheet 10 according to the first embodiment, both the upper surface and the lower surface are composed of adhesive transparent adhesive layers (the first transparent adhesive layer 120 and the second transparent adhesive layer 130). It can be affixed to almost any member without using a double-sided PSA sheet. For example, taking the case of FIG. 6 as an example, a double-sided adhesive sheet or the like is interposed between the panel cover sheet 10 and the liquid crystal panel 50A (or touch panel 70) and between the panel cover sheet 10 and the cover glass 60. There is no need. Thereby, the working efficiency at the time of mounting the panel cover sheet 10 on another member can be improved.

  Moreover, although the window part W enclosed by the decoration layer 110 becomes an area | region which visually recognizes the information currently displayed on the display panel, in the said panel cover sheet | seat 10, the window part W (information displayed on the display panel is displayed). The region to be visually recognized) is configured by only the second transparent adhesive layer 130. For this reason, compared with the panel cover sheet | seat (for example, refer FIG. 12) in which the transparent adhesive layer becomes a multistage structure in the window part W, since the junction part of each transparent adhesive layer does not exist, each transparent It is possible to suppress the change in the refractive index of light and the generation of bubbles at the joint between the adhesive layers. Thereby, the visibility of images such as characters and photographs displayed on the display panel is excellent.

  FIG. 3 is a view for explaining the panel cover sheet manufacturing apparatus 500 according to the first embodiment. FIG. 3 schematically shows the panel cover sheet manufacturing apparatus 500 according to the first embodiment. For this reason, although a feed mechanism or the like is not shown in FIG. 3, each member is fed along the traveling direction (in the direction of the arrow x) by some sort of feed mechanism. In addition, when there is a difference in processing speed such as processing performed in each process, it is assumed that there is a buffer mechanism that can absorb the difference in processing speed.

  FIG. 4 is a view for explaining the manufacturing process of the first half of the manufacturing process of the panel cover sheet 10 by the panel cover sheet manufacturing apparatus 500 according to the first embodiment. 4A to 4F are diagrams schematically showing enlarged broken-line frames A to F shown in FIG.

  FIG. 5 is a view for explaining the manufacturing process of the latter half of the manufacturing process of the panel cover sheet 10 by the panel cover sheet manufacturing apparatus 500 according to the first embodiment. 5 (G) to FIG. 5 (J) are diagrams schematically showing enlarged broken line frames G to J shown in FIG.

  First, the configuration of the panel cover sheet manufacturing apparatus 500 according to the first embodiment will be described with reference to FIG. 3, and then the manufacturing process of the panel cover sheet 10 (the embodiment) with reference to FIGS. 3, 4, and 5. The panel cover sheet manufacturing process according to No. 1) will be described. In addition, when explaining the structure of the panel cover sheet manufacturing apparatus 500 concerning Embodiment 1, the part of FIG.4 and FIG.5 may be referred.

  The panel cover sheet manufacturing apparatus 500 according to Embodiment 1 is fed from an initial member feeding roller 512 that feeds a long release film 511 (see FIG. 4A) as an initial member, and an initial member feeding roller 512. The release film 511 applies an ink 514 ′ (see FIG. 4B) to the release film 511, and the release film feeds out the release film 515 to be attached to the upper surface of the ink 514 ′ formed on the release film 511. The feeding roller 516, the pasting roller 517 for pasting the peeling film 515 fed from the peeling film feeding roller 516 to the upper surface of the ink 514 ', and the ink 514' to which the peeling film 515 is pasted are dried to form an ink layer. 514 (see FIG. 4C), an ink drying unit 518, and an ink layer 514. A film peeling roller 519 for peeling the peeling film 511 from the formed state, an OCA sheet feeding roller 522 for feeding the OCA sheet 521 with the peeling film to which the peeling film 520 is stuck, and an OCA sheet feeding roller 522. A sticking roller 523 that press-contacts the OCA sheet 521 with a release film 521 to the lower surface of the ink layer 514 (see FIG. 4E) and die cutting to form a window W (see FIG. 4F) are performed. It has a window forming die-cutting part 524 and an unnecessary part removing part 525 that forms the window W by removing an unnecessary part that has been removed by die cutting by the window forming die-cutting part 524.

  In addition to these components, a transparent adhesive 527 ′ (see FIG. 5G) is applied to the window W formed by the window forming die-cut part 524 and the unnecessary part removing part 525. Adhesive application part 526, release film feeding part 529 for feeding release film 528 applied to the upper surface of applied transparent adhesive 527 ', and release film 528 applied while leveling the upper surface of transparent adhesive 527' The transparent pressure-sensitive adhesive layer 527 (see FIG. 5 (H)) is formed by curing the transparent pressure-sensitive adhesive 527 ′ while maintaining the flexibility and adhesiveness of the sticking roller 530 and the transparent pressure-sensitive adhesive 527 ′. An adhesive curing part 531, and an excess part removing part 532 that is a sheet in which the excess part has been removed by removing the excess part from the one formed with the transparent adhesive layer 527 (referred to as a surplus part removed sheet). , It has a sheet cutter 533 into pieces by (direction perpendicular) cutting manner transversely to the longitudinal direction of the over - part Xu removed by printed sheet, a. Note that the affixing roller 530 has two rollers 530a and 530b arranged to face each other at a predetermined interval, and these two rollers 530a and 530b are transparent adhesive 527 ′ applied to the window portion W. The release film 528 is attached to the transparent adhesive 527 'while leveling the transparent adhesive 527' so that the thickness of the film becomes a predetermined thickness and flat.

  Next, the panel cover sheet manufacturing process according to the first embodiment will be described with reference to FIGS. 3, 4, and 5.

  First, as an initial member, a long release film 511 (see FIG. 4A) made of polyethylene tphthalate (PET) or the like is fed out from the initial member feeding roller 512 and fed out from the initial member feeding roller 512. Colored (for example, black) ink 514 ′ is applied to the upper surface of the peeled film 511 by the ink layer forming portion 513 (see FIG. 4B). 4A is an enlarged view of a cross section along the longitudinal direction in the broken line frame A in FIG. 3, and FIG. 4B is a cross section along the longitudinal direction in the broken line frame B in FIG. FIG.

  Subsequently, a release film 515 made of PET or the like is fed out from the release film feeding roller 516, and the fed-out release film 515 is pasted on the upper surface of the ink 514 ′ applied to the release film 511 by the pasting roller 517. Going to be. Thereafter, the ink drying unit 518 dries the ink 514 ′ to form the ink layer 514 (see FIG. 4C). FIG. 4C is an enlarged view showing a cross section along the longitudinal direction of the broken line frame C in FIG. Then, the peeling film 511 is peeled off by the film peeling roller 519 (see FIG. 4D). 4D is an enlarged view showing a cross section along the longitudinal direction of the broken line frame D in FIG.

  Subsequently, the OCA sheet 521 with the release film to which the release film 520 is stuck is fed from the OCA sheet feeding roller 522, and the OCA sheet 521 with the release film is the ink from which the release film 511 is peeled off by the sticking roller 523. Affixed to the lower surface of the layer 514 (see FIG. 4E). 4E is an enlarged view showing a cross section along the longitudinal direction of the broken line frame E in FIG.

  Subsequently, the window forming die-cutting part 524 performs die cutting for forming the window part W with the release film 520 left, and then the unnecessary part removing part 525 performs the window forming die-cutting part. Unnecessary portions generated by die cutting by 524 are removed (see (Fa) in FIG. 4F and (Fb) in FIG. 4F). (Fa) in FIG. 4 (F) is an enlarged view showing a section along the longitudinal direction of the broken line frame F in FIG. 3, and (Fb) in FIG. 4 (F) is (Fa) in FIG. 4 (F). ) In plan view from the upper surface side.

  Here, the sheet in which the unnecessary portion shown in FIG. 4 is removed is referred to as “unnecessary portion removed sheet”. The unnecessary part removed sheet is a sheet from which the release film 515 has been removed, and a window W is formed in each of the ink layer 514 and the OCA sheet 521.

  Subsequently, a transparent adhesive 527 ′ is applied to the window W formed in the unnecessary part removed sheet by the transparent adhesive application unit 526 (see FIG. 5G). FIG. 5G is an enlarged view showing a cross section along the longitudinal direction of the broken line frame G in FIG.

  The application of the transparent adhesive 527 ′ by the transparent adhesive application unit 526 is performed, for example, by injecting a viscous liquid transparent adhesive 527 ′ from a dispenser (not shown) or the like onto the unnecessary part removed sheet. Can do.

  Specifically, the transparent adhesive 527 ′ is injected from the dispenser or the like onto the unnecessary portion removed sheet, and from the release film feeding roll 529, the release film 528 made of PET or the like is fed out, and the released release film is delivered. 528 is attached to the upper surface of the transparent adhesive 527 ′ while passing between the two rollers 530a and 530b arranged to face each other with a predetermined interval. Note that the interval between the two rollers 530a and 530b arranged to face each other is set so that the coating thickness of the transparent adhesive 527 'becomes a predetermined thickness.

  Here, by making the amount of the transparent adhesive 527 ′ ejected from the dispenser or the like slightly larger than the volume of the window portion W or the like, the transparent adhesive 527 ′ ejected on the unnecessary portion removed sheet has two It is leveled by rollers 530a and 530b. As a result, the release film 528 is attached to the transparent adhesive 527 ′ with the upper surface of the transparent adhesive 527 ′ being leveled. Thereby, the window portion W is filled with a constant thickness, and the upper surface side (release film 528 side) and the lower surface side (release film 520 side) are flat surfaces without steps.

  Thereafter, the transparent adhesive 527 ′ is cured by the transparent adhesive curing unit 531 while maintaining the flexibility and adhesiveness of the transparent adhesive 527 ′. If the transparent adhesive 527 ′ is a UV adhesive, a UV irradiator can be used as the transparent adhesive curing unit 531. In this manner, the transparent adhesive layer 527 is formed on the window portion W (see FIG. 5H). FIG. 5H is an enlarged view showing a cross section along the longitudinal direction of the broken-line frame H in FIG. The transparent adhesive layer 527 formed in the window portion W becomes the second transparent adhesive layer 130 of the panel cover sheet 10 (see FIG. 2) as a finished product. A sheet that has passed through the transparent adhesive curing part 531 is referred to as a “sheet with a transparent adhesive layer formed”.

  Subsequently, after the surplus portion of the transparent adhesive layer formed sheet is removed so that a panel cover sheet of a predetermined size is obtained in the surplus portion removing section 532, the sheet is formed on the transparent adhesive layer formed sheet by the sheet cutting machine 533. The predetermined position between each decoration layer currently made is cut | disconnected so that a longitudinal direction (traveling direction) may be crossed.

  Specifically, the transparent adhesive layer-formed sheet is first punched out by the surplus part removing unit 532 so that the surplus part is removed so that the outer size when viewed in plan is a panel cover sheet having a predetermined size. . At this time, the surplus part removing unit 532 is punched to remove the surplus part while leaving only the release film 520 of the OCA sheet 521 with the release film ((Ia) in FIG. 5 (I) and FIG. 5). (See (Ib) of (I).) (Ia) in FIG. 5 (I) is an enlarged view of the cross section along the longitudinal direction of the broken line frame I in FIG. 3, and (Ib) in FIG. 5 (I) is (Ia) in FIG. ) Is a plan view from the upper surface side (plan view). In addition, in (Ib) of FIG. 5 (I), illustration of the peeling film 528 stuck on the upper surface is omitted.

  In (Ia) of FIG. 5 (I) and (Ib) of FIG. 5 (I), the release film 520 becomes the release film 140 of the panel cover sheet 10 (see FIG. 2) as a finished product, and the OCA sheet 521 is The first transparent adhesive layer 120 of the panel cover sheet 10 (see FIG. 2) as the finished product, and the ink layer 514 becomes the decorative layer 110 of the panel cover sheet 10 (see FIG. 2) as the finished product, The transparent adhesive layer 527 becomes the second transparent adhesive layer 130 of the panel cover sheet 10 (see FIG. 2) as a finished product, and the release film 528 peels off the panel cover sheet 10 (see FIG. 2) as a finished product. The film 150 is to be obtained.

  Subsequently, a transparent adhesive layer has been formed at a predetermined position between the ink layers 514 (between adjacent ink layers 514) left by the removal of the excess portion along the traveling direction (arrow x direction) by the sheet cutting machine 533. Cut across the longitudinal direction of the sheet (in the orthogonal direction). Thereby, the panel cover sheet 10 having a predetermined size is manufactured (see FIG. 5J). FIG. 5J is an enlarged view showing a cross section along the longitudinal direction of the broken line frame I in FIG. 3, and shows one panel cover sheet 10 that is divided into pieces.

  The single panel cover sheet 10 shown in FIG. 5J has the same configuration as the panel cover sheet 10 shown in FIG. That is, in the panel cover sheet 10 shown in FIG. 5 (J), the release film 520 corresponds to the release film (release film on the lower surface side) 140 of the panel cover sheet 10 (see FIG. 2) as a finished product. The sheet 521 corresponds to the first transparent adhesive layer 120 of the panel cover sheet 10 (see FIG. 2) as a finished product, and the ink layer 514 is added to the panel cover sheet 10 (see FIG. 2) as a finished product. The transparent adhesive layer 527 corresponds to the decorative layer 110, the transparent adhesive layer 527 corresponds to the second transparent adhesive layer 130 of the panel cover sheet 10 (see FIG. 2) as a finished product, and the release film 528 is the panel cover sheet as a finished product. 10 (refer to FIG. 2) corresponding to a release film 150 (release film on the upper surface side).

  The panel cover sheet 10 shown in FIGS. 1 and 2 can be manufactured by sequentially performing the above steps. And when mounting the said panel cover sheet | seat 10 to a liquid crystal panel etc., it is set as the state which peeled off the peeling films 140 and 150 stuck on the upper surface and the lower surface (refer FIG. 1).

  FIG. 6 is a diagram schematically illustrating a mounting example when the panel cover sheet 10 according to the first embodiment is mounted on the display panel. FIG. 6A shows a panel cover sheet according to the first embodiment in a liquid crystal panel (for example, a TFT liquid crystal panel) 50A in which a touch panel function such as an in-cell type or an on-cell type is integrated as a display panel. FIG. 6B is a cross-sectional view when the panel cover sheet 10 according to Embodiment 1 is used as a display panel on a liquid crystal panel 50B to which a touch panel is externally attached. is there.

  In the case where the panel cover sheet 10 according to the first embodiment is used for the liquid crystal panel 50A in which the touch panel function is integrated, as shown in FIG. 6A, the operation is performed between the liquid crystal panel 50A and the cover glass 60. It can be used with the panel cover sheet 10 according to the first aspect interposed.

  On the other hand, in the case where the panel cover sheet 10 according to the first embodiment is used for the liquid crystal panel 50B to which the touch panel is externally attached, as shown in FIG. 6B, the operation is performed between the touch panel 70 and the cover glass 60. It can be used with the panel cover sheet 10 according to the first aspect interposed.

  When the panel cover sheet 10 according to the first embodiment is used as shown in FIGS. 6A and 6B, the release films 140 and 150 are peeled off. Accordingly, when the panel cover sheet 10 is interposed between the liquid crystal panel 50A and the cover glass 60 as shown in FIG. 6A, the panel cover sheet 10 is the first transparent adhesive layer 120 of the panel cover sheet 10. And it will be in the state affixed on 50 A of liquid crystal panels and the cover glass 60 by the adhesiveness which the 2nd transparent adhesion layer 130 has. Similarly, when the panel cover sheet 10 is interposed between the touch panel 70 and the cover glass 60 as shown in FIG. 6B, the panel cover sheet 10 includes the first transparent adhesive layer 120 and the panel cover sheet 10. It will be in the state stuck on the touchscreen 70 and the cover glass 60 by the adhesiveness which the 2nd transparent adhesion layer 130 has.

  As described above, in the panel cover sheet 10 according to the first embodiment, since the entire panel cover sheet 10 has flexibility, it can be used not only for a flat panel but also for a panel having a curved surface. It can cope with diversification of shape.

  Further, in the panel cover sheet 10 according to the first embodiment, both the upper surface and the lower surface are composed of adhesive transparent adhesive layers (the first transparent adhesive layer 120 and the second transparent adhesive layer 130). It can be affixed to almost any member without using a double-sided PSA sheet. For example, taking the case of FIG. 6 as an example, a double-sided adhesive sheet or the like is interposed between the panel cover sheet 10 and the liquid crystal panel 50A (or touch panel 70) and between the panel cover sheet 10 and the cover glass 60. There is no need. Thereby, the number of parts can be reduced and the number of assembly steps can be reduced.

  Moreover, in the panel cover sheet 10 which concerns on Embodiment 1, the window part W (area | region which visually recognizes the information currently displayed on the display panel) becomes a structure formed only with the 2nd transparent adhesion layer 130. FIG. Therefore, it is possible to suppress the change in the refractive index of light and the generation of bubbles, thereby improving the visibility of images such as characters and photographs displayed on the display panel.

[Embodiment 2]
FIG. 7 is a view for explaining the panel cover sheet 20 according to the second embodiment. 7 is a diagram schematically showing the configuration of the panel cover sheet 20, FIG. 7 (a) is a plan view, and FIG. 7 (b) is a cross-sectional view taken along the line aa in FIG. 7 (a). It is. In addition, since each figure which shows the panel cover sheet 20 which concerns on Embodiment 2 is also a schematic diagram, thickness etc. are exaggerated and drawn.

  As shown in FIG. 7, the panel cover sheet 20 according to the second embodiment has a decorative layer 110 that forms a window frame that forms a window W inside, and a window frame that forms a window W inside. A film member 160 made of a synthetic resin (for example, PET) having a decorative layer 110 formed on the upper surface and a window frame shape forming a window portion W on the inner side, and the upper surface on the lower surface of the film member 160 The first transparent pressure-sensitive adhesive layer 120 that is bonded and has a lower surface serving as a bonding surface to the display panel (not shown in FIG. 7) and the upper surface of the decorative layer 110 and a decorative layer The window portion W surrounded by 110, the window portion W surrounded by the film member 160, and the window portion W surrounded by the first transparent adhesive layer 120 are formed so as to be flexible, and the lower surface serves as an adhesive surface to the display panel. A second transparent adhesive layer 130 having a property .

  The panel cover sheet 20 according to the second embodiment is different from the panel cover sheet 10 according to the first embodiment in that a film member 160 made of synthetic resin such as PET is provided between the decorative layer 110 and the first transparent adhesive layer 120. The other configuration is the same as that of the panel cover sheet 10 according to the first embodiment.

  FIG. 8 is a cross-sectional view illustrating a state where release films 140 and 150 are attached to the lower and upper surfaces of the panel cover sheet 20. As shown in FIG. 8, the panel cover sheet 20 according to the second embodiment also has release films 140 and 150 (see FIG. 8) attached to the upper and lower surfaces, similarly to the panel cover sheet 10 according to the first embodiment. It is in a state. And when attaching the said panel cover sheet | seat 10 to a display panel, the said peeling films 140 and 150 are peeled and used. The panel cover sheet 20 shown in FIG. 7 shows a state where the release films 140 and 150 are peeled off.

  Similarly to the panel cover sheet 10 according to the first embodiment, the panel cover sheet 20 according to the second embodiment configured as described above is configured so that the entire panel cover sheet 20 has flexibility. The window portion W (region for visually recognizing information displayed on the display panel) surrounded by the decoration layer 110 is configured by only the second transparent adhesive layer 130. For this reason, the panel cover sheet 20 according to the second embodiment also has the same effect as the panel cover sheet 10 according to the first embodiment.

  FIG. 9 is a view for explaining the panel cover sheet manufacturing apparatus 600 according to the second embodiment. FIG. 9 schematically shows a panel cover sheet manufacturing apparatus 600 according to the second embodiment. For this reason, although a feed mechanism or the like is not shown in FIG. 9, it is assumed that each member is fed along the traveling direction (in the direction of the arrow x) by some sort of feed mechanism. In addition, when there is a difference in processing speed such as processing performed in each process, it is assumed that there is a buffer mechanism that can absorb the difference in processing speed.

  FIG. 10 is a view for explaining the manufacturing process of the first half of the manufacturing process of the panel cover sheet 20 by the panel cover sheet manufacturing apparatus 600 according to the second embodiment. 10A to 10D are diagrams schematically showing enlarged broken-line frames A to D shown in FIG.

  FIG. 11 is a diagram for explaining the manufacturing process of the latter half of the manufacturing process of the panel cover sheet 20 by the panel cover sheet manufacturing apparatus 600 according to the second embodiment. Note that FIGS. 11E to 11H are diagrams schematically showing enlarged broken lines E to H shown in FIG. 9.

  First, the configuration of the panel cover sheet manufacturing apparatus 600 according to the second embodiment will be described with reference to FIG. 9, and then the manufacturing process of the panel cover sheet 20 (the embodiment) with reference to FIGS. 9, 10, and 11. The panel cover sheet manufacturing process according to 2) will be described. In addition, when explaining the structure of the panel cover sheet manufacturing apparatus 600 which concerns on Embodiment 2, the part of FIG.10 and FIG.11 may be referred.

  In the panel cover sheet manufacturing apparatus 600 according to the second embodiment, the OCA sheet 601 has a long surface in which a release film 602 made of PET or the like is attached to the lower surface and a film member 603 made of PET or the like is attached to the upper surface. An initial member feeding roller 612 that feeds the sheet 610 as an initial member (see FIG. 10A), and a long sheet 610 fed from the initial member feeding roller 612, ink 614 ′ (see FIG. 10B). ) Is applied to the upper surface of the ink 614 ′, the release film feeding roller 616 that feeds the release film 615 attached to the upper surface of the ink 614 ′, and the release film 615 fed from the release film feeding roller 616 is removed from the upper surface of the ink 614 ′. Affixing roller 617 and a release film 615 are affixed to The ink drying unit 618 that forms the ink layer 614 (see FIG. 10C) by drying the ink 614 ′ to be dried, and the window W (see FIG. 10D) in the state where the ink layer 614 is formed. .), An unnecessary portion removing portion 620 that forms the window portion W by removing an unnecessary portion that has been removed by die cutting by the window forming die cutting portion 619, have.

  In addition to these components, a transparent adhesive 622 ′ (see FIG. 11E) is applied to the window W formed by the window forming die-cutting part 619 and the unnecessary part removing part 620. Adhesive application part 621, release film feeding part 624 for feeding release film 623 applied to the upper surface of applied transparent adhesive 622 ′, and release film 623 applied while leveling the upper surface of transparent adhesive 622 ′ The transparent pressure-sensitive adhesive layer 622 is cured to form a transparent pressure-sensitive adhesive layer 622 (see FIG. 11F) while maintaining the flexibility and pressure-sensitive adhesiveness of the sticking roller 625 and the transparent pressure-sensitive adhesive 622 ′. The surplus part removing unit 627 is a sheet in which the surplus part is removed by removing the surplus part from the adhesive cured part 626 and the transparent adhesive layer 622 formed (referred to as a surplus part removed sheet). , And a sheet cutting machine 628 singulating and (direction perpendicular) cutting manner transversely to the longitudinal direction of the surplus portion Xu removed by printed sheet, a. Note that the affixing roller 625 has two rollers 625a and 625b arranged to face each other with a predetermined interval, and these two rollers 625a and 625b are transparent adhesive 622 ′ applied to the window portion W. The release film 623 is attached to the transparent adhesive 622 ′ while leveling the transparent adhesive 622 ′ so that the thickness of the film becomes a predetermined thickness and flat.

  Next, a panel cover sheet manufacturing process according to the second embodiment will be described with reference to FIGS. In the description of the panel cover sheet manufacturing process according to the second embodiment, the description of the processes common to the panel cover sheet manufacturing process according to the first embodiment will be simplified or omitted.

  In the panel cover sheet manufacturing process according to the second embodiment, a long sheet 610 as shown in FIG. 10A is fed out from the initial member feeding roller 612 as an initial member. The long sheet 610 has a configuration in which a release film 602 is attached to the lower surface of the OCA sheet 601 and a film member 603 is attached to the upper surface. The long sheet 610 having such a configuration can be purchased from a manufacturer that manufactures this type of product. 10A is an enlarged view showing a cross section along the longitudinal direction of the broken line frame A in FIG.

  A long sheet 610 shown in FIG. 10A is fed out from an initial member feeding roller 612, and ink 614 'is applied by an ink application unit 613 (see FIG. 10B). FIG. 10B is an enlarged view showing a cross section along the longitudinal direction of the broken line frame B in FIG. The ink 614 ′ is applied to the upper surface of the film member 603 in the panel cover sheet 20 according to the second embodiment. Subsequently, the peeling film 615 fed from the peeling film feeding roller 616 is pasted on the upper surface of the ink 614 ′ by the pasting roller 617, and then the ink 614 ′ is dried by the ink drying unit 618 to form the ink layer 614 ( (See FIG. 10C). FIG. 10C is an enlarged view showing a cross section along the longitudinal direction of the broken line frame C in FIG.

  Subsequently, a die cutting process for forming the window W with the release film 602 remaining is performed by the window forming die cutting part 619, and then an unnecessary part is removed by the unnecessary part removing part 620. Although the removal step is performed, each step after the die cutting step by the window forming die cutting portion 619 is performed after the die cutting step by the window forming die cutting portion 524 in the panel cover sheet manufacturing process according to the first embodiment. It is the same as each process.

  For this reason, detailed description is omitted for each step after the die-cutting step by the window forming die-cutting part 619 in the panel cover sheet manufacturing process according to the second embodiment, and the steps after the respective steps are illustrated. 10 (D) and FIGS. 11 (E) to 11 (H). However, in the panel cover sheet 20 according to the second embodiment, the film member 603 is interposed between the ink layer 614 and the OCA sheet 601 (the OCA sheet 521 in the panel cover sheet 20 according to the second embodiment). This is different from the panel cover sheet 10 according to the first embodiment.

  FIG. 10D is an enlarged view showing a cross section along the longitudinal direction of the broken-line frame D in FIG. 9, and a die cutting process for forming the window portion W by the window portion forming die cutting portion 619. After that, the unnecessary portion removing step is performed by the unnecessary portion removing section 620. FIG. 10D corresponds to FIG. 4F in the panel cover sheet manufacturing process according to the first embodiment.

  FIG. 11E is an enlarged view showing a section along the longitudinal direction of the broken line frame E in FIG. 9, and the transparent adhesive 622 ′ is applied to the window W by the transparent adhesive application part 621. Is shown. FIG. 11E corresponds to FIG. 5G in the panel cover sheet manufacturing process according to the first embodiment.

  FIG. 11F is an enlarged view showing a cross section along the longitudinal direction of the broken line frame F in FIG. 9, and shows a state where the transparent adhesive layer 622 is formed. Specifically, a release film 623 is affixed to the upper surface of the applied transparent adhesive, and then the transparent adhesive is maintained in a state where the flexibility and adhesiveness of the transparent adhesive 622 ′ are maintained by the transparent adhesive curing unit 626. 622 'is hardened | cured and the state by which the transparent adhesion layer 622 was formed is shown. This corresponds to FIG. 5H in the panel cover sheet manufacturing process according to the first embodiment. In addition, the transparent adhesive layer 622 formed in the window part W becomes the 2nd transparent adhesive layer 130 of the panel cover sheet 20 (refer FIG. 8) as a finished product.

  11G is an enlarged view of the cross section along the longitudinal direction of the broken-line frame G in FIG. 9, and FIG. 11G (Gb) is (Ga) in FIG. 11G. ) Is a plan view from the upper surface side (plan view). Note that (Ga) in FIG. 11 (G) and (Gb) in FIG. 11 (G) show a state in which die cutting for removing the surplus portion is performed by the surplus portion removing portion 627. This corresponds to (Ia) in FIG. 5 (I) and (Ib) in FIG. 5 (I) in the panel cover sheet manufacturing process according to the first embodiment. In addition, in (Gb) of FIG. 11 (G), illustration of the peeling film 623 stuck on the upper surface is omitted.

  FIG. 11H is an enlarged view showing a cross section along the longitudinal direction of the broken line frame H in FIG. 9. Between the ink layers 614 left by the removal of the excess portion (between adjacent ink layers 614). Is cut by the sheet cutting machine 628 so as to cross the longitudinal direction (traveling direction) of the transparent adhesive layer dried sheet (in the orthogonal direction). This corresponds to FIG. 5J in the panel cover sheet manufacturing process according to the first embodiment.

  A single panel cover sheet 20 shown in FIG. 11H has the same configuration as the panel cover sheet 20 shown in FIG. Note that in the panel cover sheet 20 shown in FIG. 11H, the release film 602 provided on the lower surface side corresponds to the release film 140 (release film on the lower surface side) 140 of the panel cover sheet 20 in FIG. The sheet 601 corresponds to the first transparent adhesive layer 120 of the panel cover sheet 20 in FIG. 8, the film member 603 corresponds to the film member 160 of the panel cover sheet 20 in FIG. 8, and the ink layer 614 in FIG. 8 corresponds to the decorative layer 110 of the panel cover sheet 20, the transparent adhesive layer 622 corresponds to the second transparent adhesive layer 130 of the panel cover sheet 20 in FIG. 8, and the release film 623 provided on the upper surface side is a figure. 8 corresponds to the release film (release film on the lower surface side) 150 of the panel cover sheet 20 in FIG.

  The panel cover sheet 20 according to the second embodiment (see FIGS. 7 and 8) is structurally characterized in that a film member 160 is interposed between the decorative layer 110 and the first transparent adhesive layer 120. Only the panel cover sheet 10 according to the first embodiment is different, and the same usage as the panel cover sheet 10 according to the first embodiment is possible (see FIG. 6).

  Also, in the panel cover sheet 20 according to the second embodiment, since the entire panel cover sheet 20 has flexibility, the panel cover sheet 20 can be used not only for a flat panel but also for a panel having a curved surface. It can respond to conversion. Moreover, since both surfaces of the upper surface and the lower surface are composed of adhesive layers having adhesive properties (the first transparent adhesive layer 120 and the second transparent adhesive layer 130), most of them can be used without using other double-sided adhesive sheets. It can be used by sticking to the material. Further, since the window portion (the region where information displayed on the display panel is visually recognized) is configured only by the second transparent adhesive layer 130, characters, photographs, etc. displayed on the display panel The image is highly visible.

[Embodiment 3]
FIG. 12 is a view for explaining the panel cover sheet 30 according to the third embodiment. 12 is a diagram schematically showing the configuration of the panel cover sheet 30, FIG. 12 (a) is a plan view, and FIG. 12 (b) is a cross-sectional view taken along the line aa in FIG. 12 (a). It is. In addition, since each figure which shows the panel cover sheet 30 which concerns on Embodiment 3 is also a schematic diagram, thickness etc. are exaggerated and drawn.

  As shown in FIG. 12, the panel cover sheet 30 according to the third embodiment includes a decoration layer 110 that forms a window frame that forms a window W inside, and a decoration layer 110 formed on the upper surface. A transparent film member 170 made of a transparent synthetic resin provided so as to cover the layer 110 and the window W from the lower surface side, and a window W that covers the upper surface of the decorative layer 110 and is surrounded by the decorative layer 110. And a transparent adhesive layer 180 having flexibility that is formed so as to be buried. It is assumed that the transparent film member 170 is made of PET or the like, can be bent freely, and has a certain degree of shape retention after bending.

  The panel cover sheet 30 according to the third embodiment is different from the panel cover sheet 10 according to the first embodiment in that a transparent film member 170 is provided so as to cover the decorative layer 110 and the window portion W from the lower surface side. is there.

  FIG. 13 is a cross-sectional view illustrating a state in which the release film 190 is attached to the upper surface of the panel cover sheet 30. The release film 190 is in a peeled state when the panel cover sheet is attached to a lower surface (back surface) such as a glass cover. In addition, the panel cover sheet 30 shown in FIG. 12 demonstrated previously has shown the state which peeled the peeling film 190. FIG.

  Similarly to the panel cover sheet 10 according to the first embodiment, the panel cover sheet 30 according to the third embodiment configured as described above is configured so that the entire panel cover sheet 20 has flexibility. A window portion W (a region for visually recognizing information displayed on the display panel) surrounded by the decoration layer 110 is configured by only the transparent adhesive layer 180.

  Further, in the panel cover sheet 30 according to the third embodiment, since the transparent film member 170 is provided so as to cover the decorative layer 110 and the window portion W from the lower surface side, the panel cover sheet 30 is a mounting target. It can shape | mold so that the shape (for example, cover cover glass etc. which protect a display panel etc.) may be followed. For this reason, since the panel cover sheet 30 according to the third embodiment can be mounted on the member to be mounted in a state of being molded into the shape of the member to be mounted, the mounting work can be made efficient. .

  FIG. 14 is a view for explaining the panel cover sheet manufacturing apparatus 700 according to the third embodiment. FIG. 14 schematically shows a panel cover sheet manufacturing apparatus 700 according to the third embodiment. For this reason, although a feed mechanism or the like is not shown in FIG. 14, each member is fed along the traveling direction (in the direction of the arrow x) by some sort of feed mechanism. In addition, when there is a difference in processing speed such as processing performed in each process, it is assumed that there is a buffer mechanism that can absorb the difference in processing speed.

  FIG. 15 is a view for explaining the manufacturing process of the panel cover sheet 30 by the panel cover sheet manufacturing apparatus 700 according to the third embodiment. 15A to 15E are diagrams schematically showing enlarged broken-line frames A to E shown in FIG.

  First, the configuration of the panel cover sheet manufacturing apparatus 700 according to the third embodiment will be described with reference to FIG. 14, and then the manufacturing process of the panel cover sheet 30 (with reference to the third embodiment) will be described with reference to FIGS. The panel cover sheet manufacturing process will be described. In addition, when explaining the structure of the panel cover sheet manufacturing apparatus 700 which concerns on Embodiment 3, a part of FIG. 15 may be referred.

  In the panel cover sheet manufacturing apparatus 700 according to the third embodiment, a long sheet 710 having an ink layer 701 formed by printing or the like on the upper surface of a transparent film member 702 made of a synthetic resin is used as an initial member (see FIG. 15A). .) In the long sheet 710, the window portion W is already formed. The long sheet 710 having such a configuration can be purchased from a manufacturer that manufactures this type of product.

  The panel cover sheet manufacturing apparatus 700 according to the third embodiment is formed on an initial member feeding roller 712 for feeding out such an initial member (long sheet 710) and a long sheet 710 fed from the initial member feeding roller 712. A transparent adhesive application portion 713 for applying a transparent adhesive 714 ′ (see FIG. 15B) to the window W, and a release film 715 to be applied to the upper surface of the applied transparent adhesive 714 ′ are repeated. The release film feeding portion 716 to be put out, the application roller 717 to which the release film 715 is applied while leveling the upper surface of the transparent adhesive 714 ′, and the transparent adhesive while maintaining the flexibility and adhesiveness of the transparent adhesive 714 ′ The transparent adhesive layer 714 that forms the transparent adhesive layer 714 (see FIG. 15C) by curing the agent 714 ′ and the transparent adhesive layer 714 are formed. The surplus portion is removed from the surplus portion, and the surplus portion is removed (referred to as a surplus portion removed sheet). The surplus portion removing portion 719 crosses the longitudinal direction of the surplus portion gradually removed sheet (orthogonal). A sheet cutting machine 720 that cuts and divides the sheet into pieces. Note that the affixing roller 717 has two rollers 717a and 717b arranged to face each other with a predetermined interval, and these two rollers 717a and 717b are transparent adhesive 714 ′ applied to the window portion W. The release film 715 is attached to the transparent adhesive 714 'while leveling the transparent adhesive 714' so that the thickness of the film becomes a predetermined thickness and flat.

  Next, with reference to FIG.14 and FIG.15, the panel cover sheet manufacturing process which concerns on Embodiment 3 is demonstrated. In addition, in description of the panel cover sheet manufacturing process which concerns on Embodiment 3, description is simplified or abbreviate | omitted and demonstrated about the process which is common in the panel cover sheet manufacturing process which concerns on Embodiment 1. FIG.

  In the panel cover sheet manufacturing process according to the third embodiment, a long sheet 710 as shown in FIG. 15A is fed out from the initial member feeding roller 712 as an initial member. FIG. 15A is an enlarged view showing a cross section along the longitudinal direction of the broken line frame A in FIG.

  After the long sheet 710 shown in FIG. 15A is fed from the initial member feeding roller 712, the transparent adhesive 714 'is applied to the window W by the transparent adhesive application unit 713. FIG. 15B is an enlarged view showing a cross section along the longitudinal direction of the broken line frame B in FIG. 14, and shows a state where the transparent adhesive 714 ′ is applied to the window portion W.

  FIG. 15C is an enlarged view showing a cross section along the longitudinal direction of the broken line frame C in FIG. 14, and shows a state in which the transparent adhesive layer 714 is formed. Specifically, a release film 715 is affixed to the upper surface of the applied transparent adhesive 714 ′, and then the transparent adhesive curing part 718 is transparent while maintaining the flexibility and adhesiveness of the transparent adhesive 714 ′. The state where the adhesive 714 ′ is cured and the transparent adhesive layer 714 is formed is shown. In addition, the transparent adhesive layer 714 formed in the window part W becomes the transparent adhesive layer 180 of the panel cover sheet 30 (refer FIG. 13) as a finished product.

  (Da) in FIG. 15D is an enlarged view of the cross section along the longitudinal direction of the broken line frame D in FIG. 14, and (Db) in FIG. 15D is (Db) in FIG. It is the figure (plan view) which planarly viewed Da) from the upper surface side. Note that (Da) in FIG. 15D and (Db) in FIG. 15D show a state in which die cutting for removing the surplus portion is performed by the surplus portion removing portion 719. In addition, in (Db) of FIG.15 (D), illustration is abbreviate | omitting the peeling film 715 stuck on the upper surface.

  FIG. 15E is an enlarged view showing a cross section along the longitudinal direction of the broken line frame E in FIG. 14. Between the ink layers 701 left by the removal of the excess portion (between adjacent ink layers 701). Is cut by a sheet cutting machine 720 so as to cross the longitudinal direction (traveling direction) of the transparent adhesive layer dried sheet (in a direction orthogonal). In the panel cover sheet manufacturing process according to the third embodiment, cutting is performed along the outer edge of each ink layer 701 left by the removal of the excess part.

  The single panel cover sheet 30 shown in FIG. 15E has the same configuration as the panel cover sheet 30 shown in FIG. In the panel cover sheet 30 shown in FIG. 15E, the transparent film member 702 corresponds to the transparent film member 170 of the panel cover sheet 30 in FIG. 13, and the ink layer 701 is added to the panel cover sheet 30 in FIG. The adhesive layer 110 corresponds to the transparent adhesive layer 714 corresponds to the transparent adhesive layer 180 of the panel cover sheet 30 in FIG. 13, and the release film 715 provided on the upper surface side peels off the panel cover sheet 30 in FIG. This corresponds to the film 190.

  The panel cover sheet 30 according to the third embodiment (see FIGS. 12 and 13) can be basically used in the same manner as the panel cover sheet 10 according to the first embodiment (see FIG. 6).

[Modification of Panel Cover Sheet According to Embodiment 3]
A modification of the panel cover sheet according to the third embodiment is referred to as “panel cover sheet 40”.
FIG. 16 is a diagram illustrating a long sheet 730 as an initial member used when manufacturing a panel cover sheet 40 as a modification of the panel cover sheet according to the third embodiment. A long sheet 730 as an initial member shown in FIG. 16 has a transparent adhesive layer 703 for adhering a display panel having the flexibility that the lower surface becomes an adhesive surface to the display panel on the lower surface of the transparent film member 702. Yes. Note that a release tape (a release tape on the lower surface side) 704 is attached to the lower surface of the transparent adhesive layer 703. The long sheet 730 having such a configuration can be purchased from a manufacturer that manufactures this type of product.

  Using such a long sheet 730 as an initial member, the sheet is fed from an initial member feeding roller 712 (see FIG. 14), and the steps shown in FIGS. 15B to 15E are performed. A panel cover sheet 40 as shown can be produced. In this case, in the surplus portion removing unit 719, the release film (referred to as the release film on the upper surface side) 715 and the transparent adhesive are left so as to be the size of the panel cover sheet 40, leaving only the release film 704 on the lower surface side. Unnecessary portions are removed from the layer 714, the ink layer 701, the transparent film member 702, and the transparent adhesive layer 703 for bonding the display panel. Thereafter, a predetermined position between each ink layer 701 (between adjacent ink layers 701) left by the removal of the excess portion is cut by the sheet cutting machine 720 so as to cross the longitudinal direction (traveling direction) (in a direction orthogonal to each other). To do. By performing such a process, the panel cover sheet 40 having a configuration as shown in FIG. 17 can be produced.

  In the panel cover sheet 40 having the configuration as shown in FIG. 17, the transparent film member 702 corresponds to the transparent film member 170 of the panel cover sheet 30 in FIG. 13, and the ink layer 701 is the panel cover sheet 30 in FIG. The transparent adhesive layer 714 corresponds to the transparent adhesive layer 180 of the panel cover sheet 30 in FIG. 13, and the release film 715 on the upper surface side is the release film 190 of the panel cover sheet 30 in FIG. It is equivalent to. In addition, in the panel cover sheet 40, in addition to these components, a transparent adhesive layer for bonding a display panel formed on the lower surface of the transparent film member 702 (the transparent film member 170 of the panel cover sheet 30 in FIG. 13). 703 and a peeling tape (a peeling tape on the lower surface side) 704 attached to the lower surface of the transparent adhesive layer 703.

  Also in the panel cover sheet 40 (see FIG. 17) produced by the modification of the manufacturing process of the panel cover sheet according to the third embodiment, basically the same usage as the panel cover sheet 10 according to the first embodiment is used. It is possible (see FIG. 6).

  In addition, the panel cover sheet 30 (see FIGS. 12 and 13) and the panel cover sheet 40 (see FIG. 17) can be bent freely and have a certain degree of shape retention after bending. By providing the transparent film member 170 which is carrying out, the said panel cover sheet 30 and the panel cover sheet 40 can be shape | molded in the shape which follows the shape of a cover glass, for example. Here, the panel cover sheet 40 (see FIG. 17) will be described as an example.

  FIG. 18 is a view for explaining a case where the panel cover sheet 40 is molded into a shape that follows the shape of the cover glass. 18A is a perspective view of the cover glass 60, and FIG. 18B is a view showing a state in which the panel cover sheet 40 is molded along the shape of the cover glass 60. FIG. ) Is a cross-sectional view taken along the line aa in FIG. In this case, the cover glass 60 has a flat surface as a whole, and has a shape that is bent in an obliquely downward direction so that corners near the edge of each side are curved. (See FIG. 18 (a)).

  The panel cover sheet 40 is molded so as to be along the inner surface (lower surface) of the cover glass having such a shape. In this case, the region of the decorative layer 110 is almost bent in the lower diagonal direction (see FIGS. 18B and 18C).

  FIG. 19 is a diagram illustrating a case where the panel cover sheet 40 is attached to the cover glass and the liquid crystal panel. The cover glass 60 has a shape as shown in FIG. 18A, and the liquid crystal panel 50A has a flat surface. In such a case, by forming the panel cover sheet 40 as shown in FIGS. 18B and 18C so as to conform to the inner surface (lower surface) shape of the cover glass 60, the panel cover sheet 40 is formed. , It is not necessary to perform a bending operation to make the shape of the panel cover sheet 40 conform to the shape of the cover glass 60 each time the panel cover sheet 40 is attached to the cover glass 60 and the liquid crystal panel. The working efficiency for mounting on 50A can be greatly improved. When the panel cover sheet 40 is attached to the cover glass 60 and the liquid crystal panel 50A, the upper release film 715 (190) and the lower release film 704 (see FIG. 18C) are peeled off. To do.

  18 and 19 illustrate the case where the panel cover sheet 40 is attached to the liquid crystal panel, but the present invention can be applied not only to the liquid crystal panel but also to other information display devices. For example, many in-vehicle center consoles equipped with a car navigation system and the like have curved surfaces around the liquid crystal panel. However, even in such in-vehicle center consoles, FIG. 18 and FIG. Similarly to the description, the panel cover sheet 40 can be molded and mounted so that the shape of the panel cover sheet 40 follows the curved shape of the in-vehicle center console.

  18 and 19, the panel cover sheet 40 has been described, but the same can be applied to the panel cover sheet 30 (see FIGS. 12 and 13). In this case, since the transparent adhesive layer does not exist on the lower surface of the panel cover sheet 30, a transparent adhesive may be applied to the lower surface of the transparent film member 170.

  As described above, according to the panel cover sheet 30 according to the third embodiment and the panel cover sheet 40 which is a modified example thereof, the same effects as those of the panel cover sheet 10 according to the first embodiment can be obtained, and the third embodiment. In the panel cover sheet 30 according to the above and the panel cover sheet 40 as a modification thereof, the transparent film member 170 is provided so as to cover the decorative layer 110 and the window portion W from the lower surface side. It can shape | mold so that the shape (for example, cover glass etc. which protect a display panel) used as mounting | wearing object may be followed. For this reason, the panel cover sheet 30 according to the third embodiment and the panel cover sheet 40 as a modification thereof can be mounted on the member to be mounted in a state of being molded into the shape of the member to be mounted. The mounting work can be made efficient.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention. For example, the following modifications are possible.

  (1) In each said embodiment, although the case where the color of the decoration layer 110 was black was illustrated, it is not restricted to black, For example, red (R), green (G), blue (B) These colors can be any color such as a mixed color of RGB or a gray color.

  (2) In each of the above embodiments, the decorative layer 110 is formed by printing. However, the decorative layer 110 is not formed by printing. For example, the decorative layer 110 is formed by applying a liquid colored synthetic resin having viscosity on the film. It may be. For example, taking the panel cover sheet manufacturing apparatus 500 according to Embodiment 1 as an example, a liquid colored synthetic resin having viscosity is applied to the release film 511 fed from the initial member feeding roller 512. Subsequent steps can be performed in the same manner as the panel cover sheet manufacturing apparatus 500 according to the first embodiment. Moreover, the decoration layer 110 can also be formed with the colored synthetic resin film which has a softness | flexibility. These can be similarly implemented in the panel cover sheet manufacturing apparatus 500 according to the second embodiment.

(3) Various materials can be used for the second transparent adhesive layer 130 in Embodiment 1 and Embodiment 2 as long as the transparent adhesive has flexibility. In this case, the second transparent adhesive layer 130 may be colorless and transparent, and the content displayed on the display panel can be appropriately confirmed through the panel cover sheets 10 and 20 according to each embodiment. If it has transparency, a colored transparent adhesive having each color of red (R), green (G), and blue (B), a mixed color of RGB, or a gray color can be used. On the other hand, the first transparent adhesive layer 120 does not necessarily need to be transparent, and various materials can be used as long as they are flexible adhesives.
Similarly, in the third embodiment, the transparent adhesive layer 180 may be colorless and transparent, and the content displayed on the display panel is appropriately confirmed through the panel cover sheet 30 according to the third embodiment. A colored transparent adhesive having each color of red (R), green (G), and blue (B), a mixed color of RGB, or a gray color can be used as long as the transparency is as high as possible.

  (4) In the above embodiments, the planar shape of the panel cover sheet is exemplified as a rectangular shape, but is not limited to a rectangular shape, and may be various shapes such as a circular shape, an elliptical shape, and a polygonal shape. Is possible.

  (5) In each of the above embodiments, as an example of use of the panel cover sheet, the case where the panel cover sheet is used for a liquid crystal panel has been illustrated. However, the present invention is not limited to a liquid crystal panel. For example, an organic EL (Electro Luminescence) ) Can be used for various display panels such as panels.

  10, 20, 30 ... Panel cover sheet, 50A ... Liquid crystal panel with integrated touch panel function, 50B ... Liquid crystal panel with external touch panel, 60 ... Cover glass, 70. ··· Touch panel, 110 ·· Decorative layer, 120 ··· first transparent adhesive layer, 130 ··· 2nd transparent adhesive layer, 140, 150 ··· release film, 160, 170, 603 ··· film member , 500, 600, 700 ... Panel cover sheet manufacturing apparatus, 513, 613 ... Ink application part, 514 ', 614' ... Ink, 514, 614, 701 ... Ink layer, 518, 618 ..Ink drying part, 521, 601, 703 ... Transparent adhesive sheet (OCA sheet), 524, 619 ... Unnecessary part die cutting part, 525, 620 ... Unnecessary Removal part, 526, 621, 713 ... Transparent adhesive application part, 527 ', 622', 714 '... Transparent adhesive, 527, 622, 714 ... Transparent adhesive layer, 531, 626, 718 ..Transparent adhesive curing part, 532, 627, 719 ... Surplus part removing part, 533, 628, 720 ... Sheet cutting machine, 702 ... Transparent film member

Claims (11)

A panel cover sheet attached to the surface of a display panel in an information display device,
When the surface facing the display panel side of the panel cover sheet is the lower surface, and the surface opposite to the lower surface is the upper surface,
A decorative layer that forms a window frame that forms a window on the inside;
Forming a window frame that forms a window part on the inside, the decorative layer is formed on the upper surface, the first transparent adhesive layer having the flexibility that the lower surface becomes an adhesive surface to the display panel,
The upper surface of the decorative layer is covered and the window portion surrounded by the decorative layer and the window portion surrounded by the first transparent adhesive layer are filled, and the lower surface is an adhesive surface to the display panel. A second transparent adhesive layer having flexibility,
A panel cover sheet comprising: A panel cover sheet attached to the surface of a display panel in an information display device,
When the surface facing the display panel side of the panel cover sheet is the lower surface, and the surface opposite to the lower surface is the upper surface,
A decorative layer that forms a window frame that forms a window on the inside;
Forming a window frame that forms a window on the inside, a film member made of a synthetic resin in which the decorative layer is formed on the upper surface,
Forming a window frame that forms a window part on the inside, the upper surface is bonded to the lower surface of the film member, the lower surface is a first transparent adhesive layer having the flexibility to be an adhesive surface to the display panel,
Covering the upper surface of the decorative layer and forming a window portion surrounded by the decorative layer, a window portion surrounded by the film member, and a window portion surrounded by the first transparent adhesive layer, and a lower surface A second transparent adhesive layer having a flexibility to be an adhesive surface to the display panel;
A panel cover sheet comprising: In the panel cover sheet according to claim 1 or 2,
The said 2nd transparent adhesion layer is a panel cover sheet | seat which consists of what hardened | cured the liquid transparent adhesive which has viscosity hold | maintained the softness | flexibility and adhesiveness. In the panel cover sheet in any one of Claims 1-3,
A lower surface release film is affixed to the lower surface of the first transparent adhesive layer and the lower surface of the second transparent adhesive layer, and an upper surface release film is affixed to the upper surface of the second transparent adhesive layer. Panel cover sheet characterized by. A panel cover sheet attached to the surface of a display panel in an information display device,
When the surface facing the display panel side of the panel cover sheet is the lower surface and the surface opposite to the lower surface is the upper surface, a decorative layer that forms a window frame on the inside,
The decorative layer is formed on the upper surface, and a transparent film member made of a transparent synthetic resin provided to cover the decorative layer and the window portion from the lower surface side;
A transparent adhesive layer having flexibility that is formed so as to cover the upper surface of the decorative layer and fill a window surrounded by the decorative layer;
A panel cover sheet comprising: The panel cover sheet according to claim 5,
The said transparent adhesive layer is a panel cover sheet | seat which consists of what hardened | cured the liquid transparent adhesive which has a viscosity hold | maintained the softness | flexibility and adhesiveness. In the panel cover sheet according to claim 5 or 6,
A panel cover sheet, wherein an upper surface side release film is affixed to the upper surface of the transparent adhesive layer. In the panel cover sheet in any one of Claims 5-7,
The panel cover sheet | seat characterized by the transparent adhesive layer for display panel adhesion | attachment which has the softness | flexibility in which a lower surface becomes an adhesive surface to the said display panel in the lower surface of the said transparent film member. The panel cover sheet according to claim 8,
A panel cover sheet, wherein a release film on the lower surface side is attached to the lower surface of the transparent adhesive layer for bonding the display panel. In the panel cover sheet according to any one of claims 1 to 9,
The panel cover sheet, wherein the decorative layer is made of colored ink. In the panel cover sheet according to any one of claims 1 to 9,
The said decoration layer consists of colored synthetic resins, The panel cover sheet | seat characterized by the above-mentioned.