TW202043013A - Filming tool - Google Patents

Abstract

A filming tool is used for filming on a concaved curved surface of a cover. The filming tool has a fixture and a gasket. The fixture has a fixing groove concaved from a surface of the fixture. The cover is position in the fixing groove. The gasket is disposed on the surface of the fixture. The gasket has a protruding portion. The protruding portion is disposed on a peripheral region of the fixing groove, and the protruding portion is protruded from the peripheral region to define an opening. The concaved curved surface of a cover faces the opening.

Description

Film fixture

The present disclosure relates to a film jig.

With the advancement of modern technology, people have more and more visual pursuits. The curved screen is applied to a display device, such as a mobile touch display device such as a mobile phone. The use of a curved screen can increase the screen-to-body ratio of the display device, and users can have better visual enjoyment.

However, compared to a simple plane, machining on a curved surface will encounter some challenges. For example, when laminating a film on a curved surface, since the curved surface is three-dimensional, if you simply use the previous method of laminating a film on a flat surface, the film will not be easy to adhere closely to the curved surface. Even between the film and the curved surface, unexpected results will occur. The large bubble space directly affects the related display and even touch functions.

One technical aspect of this disclosure is related to a film jig.

According to an embodiment of the present disclosure, a film sticking jig is used to stick a film to the concave curved surface of the cover plate. The film jig includes fixing devices and gaskets. The fixing device has a fixing groove. The fixing groove is recessed from the surface of the fixing device. The cover plate is accommodated in the fixing groove. The spacer is arranged on the top surface of the fixing device. The gasket has protrusions. The protruding member is arranged at the periphery of the fixing groove and protrudes from the periphery to define an opening. The concave curved surface of the cover faces the opening.

In one or more embodiments of the present disclosure, the fixing groove opening is defined at the periphery of the film sticking jig as described above, and the opening defined by the protruding member is smaller than the fixing groove opening.

The concave curved surface has a plurality of side surfaces and a bottom surface. The edge of the concave curved surface as described above defines a concave curved opening, and the opening defined by the protruding member is smaller than the concave curved opening.

In one or more embodiments of the present disclosure, in the above-mentioned film sticking jig, the top surface of the fixing device is substantially parallel to the extending direction of the protruding piece of the gasket.

In one or more embodiments of the present disclosure, the protruding piece of the above-mentioned film sticking jig has an elongation that overlaps the concave curved surface. This elongation extends from the edge of the concave surface.

In one or more embodiments of the present disclosure, there is a distance between the bottom end of the protruding piece of the film sticking jig and the surface of the fixing groove as described above.

In one or more embodiments of the present disclosure, the elongation of the protrusions of the above-mentioned film sticking jig is greater than the spacing.

In one or more embodiments of the present disclosure, the elongation as described above is 4 times the pitch.

In one or more embodiments of the present disclosure, the protruding member of the gasket as described above has a circular arc corner, and the circular arc corner is located at one end of the opening defined by the protruding member.

In one or more embodiments of the present disclosure, the material of the gasket of the above-mentioned filming jig includes bakelite, stainless steel or graphite.

In the above-mentioned embodiments of the present disclosure, the film sticking jig of the present disclosure is used for the film sticking operation of the cover plate. Since the filming jig has a gasket, when the film is attached to the concave surface of the cover, the protrusion of the gasket prevents the film from contacting the side of the concave surface prematurely, thereby avoiding unexpected enveloping between the film and the concave surface Space, so that the film fails to fit the concave curved surface.

The following is a detailed description of the embodiments with the accompanying drawings, but the provided embodiments are not used to limit the scope of the disclosure, and the description of the structure operation is not used to limit the order of its execution, any recombination of components The structure and the devices produced with equal effects are all covered by this disclosure. In addition, the drawings are for illustrative purposes only, and are not drawn according to the original dimensions. To facilitate understanding, the same or similar elements in the following description will be described with the same symbols.

In addition, the terms (terms) used in the entire specification and the scope of the patent application, unless otherwise specified, usually have the usual meaning of each term used in this field, in the content disclosed here, and in the special content . Some terms used to describe the present disclosure will be discussed below or elsewhere in this specification to provide those skilled in the art with additional guidance on the description of the present disclosure.

In the implementation mode and the scope of the patent application, unless the article is specifically limited in the context, "a" and "the" can generally refer to a single or plural. The numbers used in the steps are only used to mark the steps for ease of description, and are not used to limit the sequence and implementation.

FIG. 1 is a perspective view of a film sticking jig 100 according to an embodiment of the present disclosure. Figure 2 shows a cross-sectional view of the filming jig 100 of Figure 1 along the line L-L. Referring to Fig. 1 and Fig. 2 at the same time, the specific structure of the film sticking jig 100 will be described. In FIG. 1, the film sticking tool 100 includes a fixing device 110 and a gasket 130. The fixing device 110 has a fixing groove 120, and the fixing groove 120 is recessed from the top surface 110S of the fixing device 110. As shown in FIG. 2, in this embodiment, the fixing groove 120 is a square groove and is vertically recessed from the top surface 110S.

Refer to Figure 1 and Figure 2 at the same time. Above the fixing device 110, the gasket 130 is arranged on the surface of the fixing device 110 in a covering manner. The gasket 130 has a protruding piece 137, and the protruding piece 137 is disposed at the peripheral edge 120R of the fixing groove 120 and protrudes from the peripheral edge 120R to define an opening 135. The opening 135 is aligned with the fixing groove 120 of the fixing device 110. In the present disclosure, the opening 135 is smaller than the fixing groove 120. Specifically, as shown in FIG. 2, the periphery of the fixing groove 120 defines an opening of the fixing groove 120 at 120R. Along the line segment L-L, the opening of the fixing groove 120 has a length L2. The opening 135 has a length L1, and the opening of the fixing groove 120 has a length L2, so the length L1 is less than the length L2. In other words, the opening 135 defined by the protrusion 137 is smaller than the opening of the fixing groove 120.

Figure 3 extends from Figure 2 and shows a schematic cross-sectional view of the film sticking jig 100 when in use. In FIG. 3, when the film sticking jig 100 is used, the cover plate 210 is set in the fixing groove 120 of the fixing device 110. As shown in Figure 3, in this embodiment, the cover 210 has a concave curved surface 220, and the concave curved surface 220 is a four-sided curved surface, and has four side surfaces 222 and a bottom surface 224, and the concave curved surface 220 has a depth H. Since FIG. 2 is a cross-sectional view, only two side surfaces 222 of the concave curved surface 220 are shown as an example. Wherein, the side surface 222 is substantially perpendicular to the bottom surface 224, and any two adjacent ones of the four side surfaces 222 are also substantially perpendicular to each other. In some embodiments, the concave curved surface 220 may have a larger number of side surfaces 222, and the side surfaces 222 are substantially perpendicular to the bottom surface 224. In some embodiments, the cover 210 is transparent, and the cover 210 is, for example, curved glass used in mobile phones. It should be understood that, without affecting the spirit and scope of the present disclosure, cover plates with different shapes but with concave curved surfaces are also included in the scope of the present disclosure.

Returning to FIG. 3, the fixing device 110 has a fixing groove 120. In this embodiment, the fixing groove 120 is a square groove. The fixing groove 120 of the square groove is convenient for accommodating the cover plate 210 with the four-sided curved concave surface 220. In some embodiments, the cover plate 210 is formed before the outside, and then the cover plate 210 is disposed in the fixing groove 120. That is to say, in some embodiments, the cover plate 210 may have other shapes different from the four-sided curved surface. According to the type of the cover plate 210, the filming jig 100 should select a suitable fixing device 110 so that the fixing device 110 is There is a suitable fixing groove 120 to accommodate the cover 210 to achieve a better fixing effect.

Referring to FIGS. 2 and 3 at the same time, the spacer 130 is disposed on the top surface 110S of the fixing device 110. As mentioned above, the gasket 130 has a protruding piece 137, and the protruding piece 137 is disposed at the periphery 120R of the fixing groove 120, and the protrusion 137 disposed along the periphery 120R defines the opening 135 of the gasket 130. The opening 135 is aligned with the fixing groove 120. The cover 210 has a concave curved surface 220, and the concave curved surface 220 faces the opening 135. The opening of the concave curved surface 220 is smaller than the opening 135 defined by the protrusion 137. Specifically, as shown in FIG. 3, the edge 220R of the concave curved surface 220 defines the opening of the concave curved surface 220, and along the line segment L-L, the opening of the concave curved surface 220 has a length L3. The opening 135 has a length L1, and the opening of the concave curved surface 220 has a length L3, so the length L1 is less than the length L3. The opening 135 defined by the protrusion 137 is smaller than the opening of the concave curved surface 220. That is, in the present disclosure, the protruding member 137 and the concave curved surface 220 of the cover 210 partially overlap.

In this embodiment, the bottom surface 224 of the cover 210, the top surface 110S of the fixing device 110 and the extending direction of the protrusion 137 of the gasket 130 are substantially parallel. As a result, as shown in Figure 2, the protrusion 137 partially overlaps the concave curved surface 220 of the cover 210, and the protrusion 137 has a horizontal extension d, which refers to the protrusion of the protrusion 137. The extension d extends from the edge 220R of the concave curved surface 220 to the length that overlaps with the concave curved surface 220. In addition, the protruding member 137 does not directly contact the fixing groove 120. As shown in Figure 3, the protruding member 137 is parallel to the top surface 110S of the fixing device 110, and the protruding member 137 is connected to the top surface 110S. There is a gap h between the connection 137B and the top surface 110S, wherein the gap h does not include the thickness of the protrusion 137 itself. For the filming jig 100 of the present disclosure, for a depth H of the concave surface 220, the spacing h and the elongation d are important parameters for controlling the performance of the filming. For details, please refer to the following discussion.

In this embodiment, as shown in FIG. 3, the protruding member 137 also has a rounded corner 137R, so that one end of the protruding member 137 is rounded. The arc angle 137R is located at one end of the protrusion 137 defining the opening 135, that is, the protrusion 137 overlaps one end of the concave curved surface 220. Therefore, one end of the protrusion 137 overlapping the concave curved surface 220 is smooth. This will be beneficial to the subsequent filming operations, please see the reasons below.

In the above paragraphs, the structure of the film sticking jig 100 is explained, and how the cover plate 210 to be used for film sticking is set on the film sticking jig 100. Next, it will be further described how to use the film sticking jig 100 to stick the film 230 to the cover plate 210, and the same reference numerals will not be repeated. FIGS. 4 to 6 are schematic cross-sectional diagrams of using the film sticking jig 100 of the present disclosure to stick the film 230 to the cover plate 210 to produce the film sticking curved surface structure 200. Among them, the pasted curved surface structure 200 is a structure generated after the cover 210 has completed pasting operations.

As shown in Figure 4, after the cover 210 is placed on the film sticking jig 100, a film 230 to be attached to the concave curved surface 220 of the cover 210 is provided, wherein the adhesive layer 250 is attached to one side of the film 230 , To connect the concave curved surface 220 and the film 230. In some embodiments, the material used for the film 230 has the characteristics of low dielectric constant and high light transmission, so the film 230 can be used for touch sensing. In some embodiments, the material of the film 230 is, for example, polyethylene terephthalate (PET) or polycarbonate (PC). In some embodiments, the material of the adhesive layer 250 is optical clear adhesive (OCA).

In this embodiment, the thin film 230 is attached to the concave curved surface 220 by a hot pressing process. After providing the film 230 with the adhesive layer 250 attached, the film 230 is heated to 120 degrees Celsius to soften the adhesive layer 250 and the film 230. Subsequently, the film 230 is disposed on the protrusion 137 of the gasket 130, as shown in FIG. 3.

Then, pressure is applied to the other side 230S of the adhesive layer 250 attached to the film 230. As a result, the film 230 is stretched by pressure and is recessed from the opening 135 of the gasket 130. Since the opening 135 of the gasket 130 also has a protrusion 137, the depression of the film 230 is substantially limited by the protrusion 137 during the hot pressing process. As the hot pressing process progresses, the film 230 will first contact the bottom surface 224 of the concave curved surface 220, then gradually cover and adhere to the bottom surface 224, and extend from the bottom surface 224 to contact the side surface 222. As shown in FIG. 4, the film 230 A part of the bottom surface 224 is attached, and a part is in contact with the side surface 222.

Generally, the hot pressing process of the cover plate 210 is likely to occur at the junction 223 between the side surface 222 and the bottom surface 224, and the film 230 is not closely attached. When there is no protrusion 137 (that is, the elongation d is 0 and the spacing h is 0), if the film 230 with the adhesive layer 250 is attached to the concave surface 220 as much as possible, the method should be hot pressing During the manufacturing process, a relatively large pressure is applied to the film 230. In this way, at the same temperature, a greater pressure forces the film 230 to withstand a greater tensile strain (strain), the film 230 therefore has a larger extension area, and the film 230 has a sufficient extension area to gradually tighten during attachment. It adheres to the bottom surface 224 and then extends and contacts the side surface 222. However, it is easier to damage the film 230. If a smaller pressure is selected for hot pressing, the film 230 will suffer less tensile strain, and the corresponding extension area of the film 230 will be smaller. It is possible that the film 230 will not fully cover the bottom surface 224 before Already in contact with side 222. This will use the connection 223 between the thin film 230 and the concave curved surface 220 to form an additional bubble space, and the thin film 230 does not adhere to the concave curved surface 220. The so-called bubble space means that the film 230 that does not touch the concave curved surface 220 encloses an area similar to a circular bubble on the concave curved surface 220. This easily occurs when the side surface 222 of the concave curved surface 220 and the bottom surface 224 are substantially perpendicular.

In Figure 5, since the filming jig 100 of the present disclosure has a protruding member 137, the protruding member 137 has an elongation d overlapping the concave curved surface 220 of the cover plate 210, which makes the hot pressing process The film 230 always relies on the protrusion 137 for hot pressing, so that the film 230 generates a film groove 235. The advantage of relying on the protruding member 137 for hot pressing is to prevent the film 230 from contacting the side surface 222 prematurely during the hot pressing process. In this way, the protruding member 137 can ensure that the membrane 230 will not contact the side surface 222 prematurely even under a small pressure. Therefore, as shown in FIG. 4, the film 230 completely covers the bottom surface 224, and a part of the side surface 230SC of the side surface 230S of the film 230 is attached to the bottom surface 224 accordingly. The side surface 230SC is substantially parallel to the bottom surface 224.

In a practical example, it can be ensured that the radius of the rounded corner R of the film 230 is less than 5 mm. In some practical examples, it can be ensured that the fillet radius of the fillet R of the film 230 is between 0.3 mm and 1.5 mm. The lower limit of this range depends on the junction 223 between the side surface 222 and the bottom surface 224 in the concave curved surface 220.

In this embodiment, since a hot pressing process is used for filming, the material of the gasket 130 has the ability to withstand the hot pressing process at a temperature of 150 degrees Celsius or less, so that the film 230 can be attached to the concave curved surface 220 through the hot pressing process . For example, the material of the gasket 130 includes bakelite, stainless steel or graphite.

In this embodiment, the bottom surface 224 of the cover plate 210 is substantially parallel to the protrusion 137 of the gasket 130. As mentioned above, the presence of the protrusion 137 is to prevent the film 230 from contacting the side surface 222 prematurely. The distance h between the joint 137B of the protruding member 137 connecting the top surface 110S and the top surface 110S also relates to whether the film 230 can fit the concave surface 220 well. Refer to Figures 2 and 4 at the same time. For example, if the distance h is too large, a lot of pressure will need to be applied during the hot pressing process to make the stretched area of the film 230 large enough to allow the film 230 to fit. On the bottom surface 224 of the concave curved surface 220. However, if the distance h is too small or even non-existent, the film 230 will not easily touch and adhere to the side surface 222, which is also not conducive to the subsequent operation of separating the cover plate 210 from the film sticking jig 100. That is to say, for the film sticking jig 100, when the concave curved surface 220 has a depth H, both the distance h and the elongation d are important parameters for controlling the film 230 to adhere to the concave curved surface 220.

In some practical examples, computer simulations can be used to test the results of hot pressing and bonding the film 230 to the cover 210 under different elongation d and different spacing h for different depths H. The computer simulation results mainly analyze whether the tensile strain force of the film 230 itself is within a reasonable range under different setting conditions, and whether the film 230 roughly fits the side surface 222 and the bottom surface 224 of the concave curved surface 220. For example, through the analysis of tensile strain force, for the case where the depth H is 3.2 mm, the elongation d is 2 mm and the spacing h is 0.5 mm. The elongation d is 4 times the distance h.

In this embodiment, the protruding member 137 is designed to have a circular arc angle 137R. When the film 230 is attached to the concave curved surface 220 of the cover 210 by hot pressing, the film 230 is partially attached to the protruding member 137 and rests on the arc corner 137R of the protruding member 137, thereby creating a film groove 235. The recessed shape of the groove 235 will follow the arc angle 137R. The rounded arc angle 137R not only does not damage the film 230, but also facilitates the stretching of the film 230 during the hot pressing process. It should be understood that the protrusion 137 having a circular arc angle 137R is only an example, and should not be limited thereto. In some embodiments, the protrusion 137 may not have the arc angle 137R.

FIG. 6 is a continuation of FIG. 5 and shows that after the hot pressing process is completed, the film 230 is attached to the concave surface 220 of the cover 210, wherein the concave surface 220 includes a side surface 222 and a bottom surface 224. In addition, the film groove 235 of the film 230 relies on the arc angle 137R of the protrusion 137. So far, using the filming jig 100 of the present disclosure, the film 230 of the adhesive layer 250 is bonded to the cover 210 to form the filming curved surface structure 200. Wherein, the pasted curved surface structure 200 is a structure generated after the cover 210 has completed pasting operations, as shown in FIG. 7.

In some embodiments, the separation of the film-sticking curved structure 200 from the film-sticking jig 100 can be divided into two steps. First, a pulling force is applied to the other side 230SC of the adhesive layer 250 of the film 230 to directly take out the filming curved structure 200 from the fixing groove 120 of the filming jig 100. For example, a suction cup can be used to suck on the side surface 230SC of the film 230, and a suction force can be applied to take out the film-coated curved structure 200. During the removal process, although the film groove 235 relies on the protrusion 137, the gasket 130 and the fixing device 110 are separable. In other words, after taking out the filming curved structure 200 from the fixing groove 120 of the filming jig 100, the gasket 130 will be engaged with the film groove 235. Then, since the film 230 is a soft material, the film groove 235 can be deformed, and the gasket 130 and the film groove 235 can be directly separated. The filmed curved surface structure 200 taken out is as shown in FIG. 7.

It should be understood that the description here is only an example, and the manner of separating the film-sticking curved structure 200 from the film-sticking jig 100 should not be limited by this. For example, the gasket 130 can also be removed first, and then the film-attached curved surface structure 200 can be taken out of the fixing groove 120.

FIG. 7 shows a schematic cross-sectional view of the film-sticking curved surface structure 200. The filmed curved surface structure 200 is made by hot pressing with a filming jig 100. The film-sticking curved structure 200 includes a cover 210, a film 230 and an adhesive layer 250. The cover 210 has a concave curved surface 220, and the concave curved surface 220 includes a side surface 222 and a bottom surface 224. The film 230 is substantially attached to the side surface 222 and the bottom surface 224. The film 230 also has a film groove 235, and the film groove 235 does not contact the cover plate 210. The adhesive layer 250 is attached to the film 230. A part of the adhesive layer 250 is located between the concave curved surface 220 of the cover plate 210 and the film 230 to connect the concave curved surface 220 of the cover plate 210 and the film 230. The function of the film groove 235 is to rely on the protrusion 137 during the hot pressing process, so that the film 230 can closely fit the bottom surface 224 of the concave curved surface 220, and thereby reduce the pressure of the external force that needs to be applied during the hot pressing process . After the curved surface structure 200 is applied, the film groove 235 is useless, so the film groove 235 must be removed.

FIG. 8 is a schematic cross-sectional view of the cover 210 after the film sticking operation is completed. In FIG. 8, the filming operation can be completed by removing the film groove 235 of the filming curved structure 200 and the part of the adhesive layer 250 attached to it. In some embodiments, the film groove 235 and the part of the adhesive layer 250 attached to it are removed, and the cutting tool is used to directly cut and remove.

As shown in FIG. 8, after the film attaching operation is completed, the cover 210 attaches the film 230 through the adhesive layer 250. In some embodiments, the thickness of the cover plate 210 ranges from 0.5 mm to 5 mm, the thickness of the adhesive layer 250 ranges from 0.05 mm to 0.2 mm, and the thickness of the film 230 ranges from Between 0.05 mm and 0.3 mm.

In summary, the filming jig of the present disclosure can be used for the filming operation of the cover plate. For example, the concave curved surface of the cover plate is a four-sided curved curved surface, so the concave curved surface has a bottom surface and a side surface substantially perpendicular to the bottom surface. Since the filming jig has a gasket, when the film is attached to the concave surface, the protrusion of the gasket prevents the film from contacting the side of the concave surface prematurely, thus avoiding the gap between the film and the concave surface The film fails to fit the concave surface. The film-sticking curved surface structure of the present disclosure is made by using the above-mentioned film-sticking jig. If so, the film can be closely attached to the concave surface of the cover. Even at the junction of the bottom surface and the side surface of the concave curved surface, the film can still fit tightly.

The features of several embodiments are described above so that those skilled in the art can better understand the description in various aspects. Those skilled in the art should understand that they can easily use this description as a basis to design or modify other processes and structures to achieve the same purposes or advantages as the embodiments introduced herein. Those skilled in the art should also understand that such an equivalent structure does not depart from the common spirit and scope of this description, and various changes, substitutions or alterations can be made without departing from the spirit and scope of this description.

100: Film fixture 110: fixed device 110S: Top surface 120: fixed groove 120R: at the periphery 130: Gasket 135: open 137: protruding piece 137B: Connection 137R: arc angle 200: film surface structure 210: cover 220: concave surface 220R: Edge 222: side 223: connection 224: Bottom 230: Film 230S, 230SC: side 235: film groove 250: Adhesive layer L-L: Line segment L1, L2, L3: length H: depth d: elongation h: spacing R: rounded corners

The advantages and drawings of the present disclosure should be understood by the following embodiments and with reference to the accompanying drawings. The descriptions of these drawings are only examples of implementations, and therefore should not be considered as limiting individual implementations or limiting the scope of patent applications for inventions. Figure 1 shows a three-dimensional view of a film jig according to an embodiment of the present disclosure; Figure 2 shows a cross-sectional view of the film jig in Figure 1 along the line L-L; Figure 3 shows a schematic cross-sectional view of the film jig in use; Figures 4-6 show a schematic cross-sectional view of using the film jig of the present disclosure to produce a film surface structure; Figure 7 is a schematic cross-sectional view of the curved surface structure of the film removed from the film jig; and Figure 8 shows a schematic cross-sectional view of the cover plate after the filming operation is completed.

110: fixed device

110S: surface

120: fixed groove

130: Gasket

135: open

137: protruding piece

137B: Connection

137R: arc angle

210: cover

220: concave surface

220R: Edge

222: side

224: Bottom

H: depth

L1, L3: length

d: elongation

h: spacing

Claims (10)

A film sticking jig is used for sticking a thin film to a concave curved surface of a cover plate, and the film sticking jig includes: A fixing device having a fixing groove, wherein the fixing groove is recessed from a top surface of the fixing device, and the cover plate is received in the fixing groove; and A gasket is arranged on the top surface of the fixing device, wherein the gasket has a protruding piece which is arranged at a periphery of the fixing groove and protrudes from the periphery to define an opening , The concave curved surface faces the opening. The film sticking jig according to claim 1, wherein a fixing groove opening is defined at the periphery of the fixing groove, and the opening defined by the protruding member is smaller than the fixing groove opening. The filming jig according to claim 2, wherein the edge of the concave curved surface defines a concave curved opening, and the opening defined by the protruding member is smaller than the concave curved opening. The film sticking jig according to claim 1, wherein the top surface of the fixing device is substantially parallel to the extending direction of the protrusion of the gasket. The film sticking jig according to claim 4, wherein the protruding member has an elongation overlapping the concave curved surface, and the elongation extends from an edge of the concave curved surface. The film sticking jig according to claim 5, wherein there is a distance between a connection point of the surface of the protruding member connected to the fixing groove and the surface. The film sticking jig according to claim 6, wherein the elongation is greater than the distance. The film sticking jig according to claim 6, wherein the elongation is 4 times the spacing. The film sticking jig according to claim 1, wherein the protruding member has an arc angle, and the arc angle is located at an end of the protruding member defining the opening. The film sticking jig according to claim 1, wherein the material of the gasket includes bakelite, stainless steel or graphite.

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