CN108219696A - To protect the protective film of the optical aperture of covering glass - Google Patents

Abstract

It is a kind of to protect the protective film of the optical aperture of covering glass, comprising：There is first film layer optical aperture protection zone and neighboring area to surround optical aperture protection zone；And first glue-line, it is set to the top of the neighboring area of the first film layer, and the setting of the first glue-line is between covering glass and the first film layer, but do not contact the optical aperture of covering glass.Due to the first glue-line not contact optical hole, the problem of viscose pollution optical aperture will not occur, do not need to subsequently carry out additional cleaning processing procedure.

Description

Protective film to protect the optical aperture of the cover glass

technical field

The invention relates to a protective film for protecting the optical hole of the cover glass.

Background technique

In order to protect the optical hole of the cover glass, a protective film is usually attached to the optical hole. However, there is adhesive on the protective film, and the adhesive will contaminate the optical hole, resulting in the need for an additional cleaning process to remove the adhesive.

Contents of the invention

The purpose of the present invention is to provide a protective film for protecting the optical hole of the cover glass, which comprises a first film layer and a first adhesive layer, the first adhesive layer does not contact the optical hole, so the optical hole will not be polluted by glue The problem. In this way, no additional cleaning process is required subsequently.

The invention provides a protective film for protecting and covering the optical hole of glass, comprising: a first film layer having an optical hole protection area and a peripheral area surrounding the optical hole protection area; and a first adhesive layer disposed on the first film layer Above the peripheral area of the , and the first adhesive layer is disposed between the cover glass and the first film layer, but not in contact with the optical hole of the cover glass.

According to several embodiments of the present invention, the cover glass includes a glass substrate and a printing layer disposed on the glass substrate, and the printing layer has openings defined as optical holes.

According to several embodiments of the present invention, the first glue layer is not disposed above the optical hole protection area of the first film layer.

According to several embodiments of the present invention, the protective film further includes: a release film or an adhesive-free film disposed above the optical hole protection area of the first film layer, and the release film or adhesive-free film is arranged to face the optical hole. hole.

According to several embodiments of the present invention, the first adhesive layer is further disposed above the optical hole protection area of the first film layer, and the protective film further includes: a second film layer disposed on the optical hole protection area of the first adhesive layer and a second adhesive layer disposed above the periphery of the second film layer, and the second adhesive layer is disposed between the cover glass and the second film layer, but does not contact the optical hole of the cover glass.

According to several embodiments of the present invention, the second film layer contacts the optical hole protection area of the first adhesive layer.

According to several embodiments of the present invention, the cover glass includes a glass substrate and a printing layer disposed on the glass substrate, and the printing layer has openings defined as optical holes.

According to several embodiments of the present invention, the second adhesive layer is configured to contact the printing layer.

According to several embodiments of the present invention, the adhesive strength between the second adhesive layer and the printing layer is greater than the adhesive strength between the first adhesive layer and the second film layer.

According to several embodiments of the present invention, the adhesive strength between the second adhesive layer and the second film layer is greater than the adhesive strength between the first adhesive layer and the second film layer.

Description of drawings

In order to make the above and other objects, features, advantages and embodiments of the present invention more clearly understood, the accompanying drawings are described as follows:

FIG. 1 is a schematic top view of a cover glass according to several embodiments of the present invention.

Fig. 2 shows a schematic cross-sectional view of the cover glass along line 2-2' of Fig. 1 according to several embodiments of the present invention.

3 is a schematic top view of a first film layer and a first adhesive layer of a protective film according to several embodiments of the present invention.

4 is a schematic cross-sectional view of a protective film used to protect an optical hole of a cover glass according to several embodiments of the present invention.

5 is a schematic cross-sectional view of a protective film and a cover glass according to several embodiments of the present invention.

6 is a schematic cross-sectional view of a protective film used to protect an optical hole of a cover glass according to several embodiments of the present invention.

7 is a schematic cross-sectional view of a protective film and a cover glass according to several embodiments of the present invention.

8 is a schematic cross-sectional view of a protective film used to protect an optical hole of a cover glass according to several embodiments of the present invention.

9 is a schematic cross-sectional view of a protective film used to protect the optical hole of the cover glass according to several embodiments of the present invention.

FIG. 10 is a schematic cross-sectional view of a protective film and a cover glass according to several embodiments of the present invention.

FIG. 11 shows a schematic cross-sectional view of a protective film and a cover glass according to several embodiments of the present invention.

12 is a schematic cross-sectional view of a protective film and a cover glass according to several embodiments of the present invention.

Reference signs:

100: cover glass

110: glass substrate

120: printing layer

122: optical hole

200A, 200B, 200C, 200D: protective film

210: The first film layer

212: Optical hole protection area

214: Surrounding area

220: the first glue layer

230: release film or non-adhesive film

240: second film layer

250: Second adhesive layer

Detailed ways

Various embodiments or examples of the present disclosure are provided below to achieve different technical features of the provided object. The components and design of the specific examples described below are used to simplify the present disclosure. Of course, these are only examples, not intended to limit the present disclosure. For example, the description discloses that the first feature structure is formed above the second feature structure, which includes the embodiment that the first feature structure and the second feature structure are formed in direct contact, and also includes the first feature structure and the second feature structure. There are other embodiments of features between the structures, that is, the first feature is not in direct contact with the second feature. In addition, the present disclosure may use repeated reference signs and/or words in various examples. These repeated symbols or words are used for the purpose of simplification and clarity, and are not used to limit the relationship between various embodiments and/or the described structures.

In addition, spatially relative terms, such as "below" and "upper", are used to conveniently describe the relative relationship between a component or feature and other components or features in the drawings. These spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the drawings. The device may be otherwise positioned (eg, rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.

Before the cover glass is attached to a sensor or a liquid crystal display module (LCM), the cover glass is cleaned. Then, a protective film will be pasted on the back of the cover glass (that is, the side with the printed layer) to avoid defects caused by the impact of subsequent processes. However, the protective film is also attached to the optical hole, and its adhesive will pollute the optical hole, resulting in the need for an additional cleaning process to remove the adhesive.

Accordingly, the present invention provides a protective film for protecting the optical hole of the cover glass, which includes a first film layer and a first adhesive layer, and the first adhesive layer does not contact the optical hole, so the optical hole will not be polluted by glue The problem. In this way, there is no need to perform an additional cleaning process, which saves the cost of the cleaning process. Several embodiments of the protective film will be described in detail below.

FIG. 1 is a schematic top view of a cover glass according to several embodiments of the present invention. Fig. 2 shows a schematic cross-sectional view of the cover glass along line 2-2' of Fig. 1 according to several embodiments of the present invention. As shown in FIGS. 1 and 2 , the cover glass 100 includes a glass substrate 110 and a printing layer 120 . The printing layer 120 is disposed above the glass substrate 110 . In some embodiments, as shown in FIG. 1 , the printing layer 120 is disposed above the periphery of the glass substrate 110 . In some embodiments, the printing layer 120 is a black ink layer or ink layer. In some embodiments, the printing layer 120 has an opening, which is defined as an optical hole 122 (or called an imaging hole).

3 is a schematic top view of a first film layer and a first adhesive layer of a protective film according to several embodiments of the present invention. As shown in FIG. 3 , the protective film 200A includes a first film layer 210 and a first adhesive layer 220 . The first film layer 210 has an optical hole protection area 212 and a peripheral area 214 . Perimeter region 214 surrounds optical aperture protection region 212 . In some embodiments, the first film layer 210 includes a plastic substrate, such as polyimide (Polyimide), polyethylene terephthalate (Polyethylene Terephthalate, PET), polyethylene naphthalate (Polyethylene Naphthalate , PEN) or polymethyl methacrylate (Polymethacrylate, PMMA). In some embodiments, the first adhesive layer 220 has an opening corresponding to the optical hole protection area 212 of the first film layer 210 , as shown in FIG. 3 .

4 is a schematic cross-sectional view of a protective film used to protect an optical hole of a cover glass according to several embodiments of the present invention. As shown in FIG. 4 , the first adhesive layer 220 is disposed above the peripheral region 214 of the first film layer 210 . In some embodiments, as shown in FIG. 4 , the first adhesive layer 220 is not disposed above the optical hole protection area 212 of the first film layer 210 .

5 is a schematic cross-sectional view of a protective film and a cover glass according to several embodiments of the present invention. As shown in FIG. 5 , the protective film 200A is attached to the cover glass 100, so that the first adhesive layer 220 is disposed between the cover glass 100 and the first film layer 210, but does not contact the optical hole 122 of the cover glass 100 (such as the optical hole 122). bottom surface and side surface of hole 122). In this way, the problem of viscose polluting the optical hole will not occur, and no additional cleaning process will be required subsequently.

6 is a schematic cross-sectional view of a protective film used to protect an optical hole of a cover glass according to several embodiments of the present invention. The difference between FIG. 6 and FIG. 4 is that the protection film 200B in FIG. 6 further includes a release film or an adhesive-free film 230 disposed above the optical hole protection area 212 of the first film layer 210 . In some embodiments, the release film or non-adhesive film 230 contacts the optical aperture protection area 212 of the first film layer 210 . In some embodiments, a release film or an adhesive-free film 230 is fixed on the optical hole protection area 212 of the first film layer 210 . In some embodiments, the outer surface of the release film or the non-adhesive film 230 has release adhesive or does not contain adhesive.

7 is a schematic cross-sectional view of a protective film and a cover glass according to several embodiments of the present invention. As shown in FIG. 7 , the protective film 200B is attached to the cover glass 100 so that the release film or non-adhesive film 230 faces the optical hole 122 of the cover glass 100 . Since the surface of the release film or non-adhesive film 230 facing the optical hole 122 only has a release adhesive or does not contain adhesive, it will not pollute the optical hole, so no additional cleaning process is required subsequently.

8 is a schematic cross-sectional view of a protective film used to protect an optical hole of a cover glass according to several embodiments of the present invention. The difference between FIG. 8 and FIG. 6 is that the first adhesive layer 220 of the protective film 200C in FIG. 8 is further disposed above the optical hole protection area 212 of the first film layer 210 . The release film or non-adhesive film 230 is disposed above the optical hole protection area 212 of the first adhesive layer 220 . In some embodiments, the release film or non-adhesive film 230 is in contact with the optical aperture protection area 212 of the first adhesive layer 220 . In some embodiments, the release film or non-adhesive film 230 is fixed on the optical hole protection area 212 of the first adhesive layer 220 .

FIG. 9 is a schematic cross-sectional view of a protective film and a cover glass according to several embodiments of the present invention. As shown in FIG. 9 , the protective film 200C is attached to the cover glass 100 so that the release film or non-adhesive film 230 faces the optical hole 122 of the cover glass 100 . Since the surface of the release film or non-adhesive film 230 facing the optical hole 122 has a release adhesive or does not contain adhesive, it will not contaminate the optical hole, so no additional cleaning process is required subsequently.

10 is a schematic cross-sectional view of a protective film used to protect the optical hole of the cover glass according to several embodiments of the present invention. The difference between FIG. 10 and FIG. 4 is that the first adhesive layer 220 of the protective film 200D in FIG. 10 is further disposed above the optical hole protection area 212 of the first film layer 210 .

In addition, another difference between FIG. 10 and FIG. 4 is that the protective film 200D in FIG. 10 further includes a second film layer 240 and a second adhesive layer 250 . As shown in FIG. 10 , the second film layer 240 is disposed above the optical hole protection area 212 of the first adhesive layer 220 . The second adhesive layer 250 is disposed above the periphery of the second film layer 240 . In some embodiments, from the above view, the second adhesive layer 250 forms a closed shape. In some embodiments, the second film layer 240 contacts the optical aperture protection area 212 of the first adhesive layer 220 .

FIG. 11 shows a schematic cross-sectional view of a protective film and a cover glass according to several embodiments of the present invention. As shown in FIG. 11 , the protective film 200D is attached to the cover glass 100 so that the second adhesive layer 250 is interposed between the cover glass 100 and the second film layer 240 , but does not contact the optical hole 122 of the cover glass 100 . In this way, the problem of viscose polluting the optical hole will not occur, and no additional cleaning process will be required subsequently.

In some embodiments, as shown in FIG. 11 , the second adhesive layer 250 is configured to contact the printing layer 120 . In some embodiments, the adhesive strength between the second adhesive layer 250 and the printing layer 120 is greater than the adhesive strength between the first adhesive layer 220 and the second film layer 240 . In some embodiments, the adhesive strength between the second adhesive layer 250 and the second film layer 240 is greater than the adhesive strength between the first adhesive layer 220 and the second film layer 240 . In this way, in the subsequent process, the first film layer 210 and the first adhesive layer 220 can be removed, leaving the second film layer 240 and the second adhesive layer 250 to continue to protect the optical hole 122, as shown in FIGS. 11 and 12 . Finally, the second film layer 240 and the second glue layer 250 are peeled off.

The features of various embodiments are briefly mentioned above, so those skilled in the art can better understand the aspects of the present disclosure. Those skilled in the art will appreciate that they can readily use the present disclosure as a basis for designing or modifying other processes and structures for carrying out the same purposes and/or achieving the same advantages of the embodiments presented herein. Those skilled in the art should also understand that these equal configurations do not depart from the spirit and scope of the present disclosure, and that various changes, substitutions, and substitutions can be made therein without departing from the spirit and scope of the present disclosure.

Claims (10)

1. It is 1. a kind of protecting the protective film of the optical aperture of covering glass, which is characterized in that include：

   There is one first film layer an optical aperture protection zone and a neighboring area to surround the optical aperture protection zone；And

   One first glue-line is set to the top of the neighboring area of first film layer, and first glue-line setting is between this Between covering glass and first film layer, but the optical aperture of the covering glass is not contacted.
2. 2. protective film as described in claim 1, the wherein covering glass include a glass substrate and a printing layer is set to this On glass substrate, which there is an opening to be defined as the optical aperture.
3. 3. protective film as described in claim 1, wherein first glue-line are not provided with the optical aperture protection in first film layer The top in region.
4. 4. protective film as described in claim 1, the wherein protective film further include：

   One release film or an adhesive-free film, are set to the top of the optical aperture protection zone of first film layer, the release film or should Adhesive-free film sets to face the optical aperture.
5. 5. protective film as described in claim 1, wherein first glue-line are further disposed upon the optical aperture of first film layer The top of protection zone, and the protective film further includes：

   One second film layer is set to the top of the optical aperture protection zone of first glue-line；And

   One second glue-line is set to the top on the periphery of second film layer, and second glue-line setting is between the covering glass Between glass and second film layer, but the optical aperture of the covering glass is not contacted.
6. 6. protective film as claimed in claim 5, wherein second film layer contact the optical aperture protection zone of first glue-line.
7. 7. protective film as claimed in claim 5, the wherein covering glass include a glass substrate and a printing layer is set to this On glass substrate, which there is an opening to be defined as the optical aperture.
8. 8. protective film as claimed in claim 7, wherein second glue-line set to contact the printing layer.
9. 9. protective film as claimed in claim 8, wherein second glue-line and the Bonding strength of the printing layer are more than first glue Layer and the Bonding strength of second film layer.
10. 10. protective film as claimed in claim 9, wherein second glue-line and the Bonding strength of second film layer be more than this first Glue-line and the Bonding strength of second film layer.