CN111999941A - Frame glue structure - Google Patents

Abstract

The invention discloses a frame glue structure which is arranged between a first substrate and a second substrate. The frame glue structure comprises a frame glue body and a retaining wall structure. The frame glue body is provided with at least one notch and surrounds at least three edges of the glue spreading area. The retaining wall structure is arranged on one side of the notch of the frame colloid and extends along at least one side of the colloid spreading area. A diversion trench is defined between the frame glue and the retaining wall structure.

Description

Frame structure

technical field

The present invention relates to a sealant structure, and in particular to a sealant structure used in a display panel lamination manufacturing process.

Background technique

In modern life, the application of display panels is becoming more and more extensive, from common TVs, computers, mobile phones to outdoor signboards, Augmented Reality (AR)/Virtual Reality (VR) devices, from flat panel displays to Surface display, the application of display panel is ubiquitous.

In the prior art, liquid optically clear adhesive (LOCA, also known as water glue) has been widely used in laminating panels of various sizes. Liquid optical adhesive (LOCA) can be used between the touch panel and the display panel, or between the cover glass and the touch panel, so that the two are evenly attached to ensure the quality of the appearance.

1A and FIG. 1B at the same time, FIG. 1A is a top view of a conventional display panel in a lamination manufacturing process and FIG. 1B is a schematic cross-sectional view along the line A'-A" of FIG. 1A. The cover glass (Cover Glass, CG) and the display panel in the aspect of water glue bonding, the cover glass (CG) 104 and the liquid crystal display module (Liquid Crystal Module, LCM) 102 are fixed with the frame glue 106, and then the liquid optical glue (LOCA) 108 is poured, and then cured. The bonding method can overcome the bonding difficulties caused by the irregular bonding surface, but when the sealing glue 112 is used at the exhaust port, air bubbles 110, overflowing glue 108a, and cover glass (CG) 104 and liquid crystal display caused by glue filling pressure are prone to appear. The problem of non-uniformity of colloid between modules (LCM) 102 leads to poor appearance. In non-planar 3D bonding, this phenomenon is more obvious and easily affects the viewable area.

SUMMARY OF THE INVENTION

In view of this, the present invention provides a sealant structure to solve the problems of air bubbles, overflow of glue and uneven colloid caused by glue filling pressure in the existing lamination manufacturing process.

In order to solve the above problems, the sealant structure of the present invention includes: a sealant body disposed between the first substrate and the second substrate, the sealant body surrounding at least three sides of the glue spreading area, wherein the sealant body has at least one gap; The wall structure is arranged on one side of the gap and extends along at least one side of the glue spreading area, wherein a diversion groove is defined between the retaining wall structure and the frame glue.

In an embodiment of the present invention, the aforementioned notch is disposed on the centerline of the aforementioned glue spreading area.

In an embodiment of the present invention, the retaining wall structure is disposed on the outer side of the frame compound.

In an embodiment of the present invention, the plastic frame body includes a pair of notches corresponding to opposite sides of the rubber spreading area.

In an embodiment of the present invention, the retaining wall structure includes a pair of strip-shaped retaining walls corresponding to the outer sides of the gaps of the frame compound.

In an embodiment of the present invention, the retaining wall structure is disposed on the inner side of the frame compound.

In an embodiment of the present invention, the retaining wall structure includes a strip-shaped retaining wall disposed inside the gap of the frame compound.

In an embodiment of the present invention, the retaining wall structure extends along three sides of the glue spreading area, and the diversion grooves are defined on opposite sides of the glue spreading area and the retaining wall structure.

In an embodiment of the present invention, the guide groove defines at least an exhaust port away from the notch, and the exhaust port is adjacent to a corner of the first substrate.

In an embodiment of the present invention, at least one of the first substrate and the second substrate is a curved surface.

In an embodiment of the present invention, the first substrate and the second substrate are a liquid crystal display module (LCM) and a cover glass (CG), respectively.

In an embodiment of the present invention, the first substrate and the second substrate are a display panel and a touch panel, respectively.

In an embodiment of the present invention, the width of the aforementioned notch is approximately between 2 mm and 10 mm.

In an embodiment of the present invention, the width of the diversion groove is approximately between 1 mm and 5 mm.

In an embodiment of the present invention, it further includes a liquid optical adhesive (LOCA) disposed in the aforementioned sealant structure.

In an embodiment of the present invention, the aforementioned further comprises a sealing glue disposed in the aforementioned diversion groove.

The embodiment of the present invention provides a guide groove in the sealant structure, which not only prolongs the exhaust passage, but also prevents the glue from overflowing. In addition, after standing, the colloid leveling can avoid the problem of uneven colloid caused by the glue filling. At the same time, the diversion groove can remove the end glue bubbles into the diversion groove, and the diversion groove is located under the ink area, which will not affect the visible area. This design is more effective in 3D curved surfaces.

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, several embodiments are given below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

The contents of the embodiments of the present invention can be better understood through the following detailed description in conjunction with the accompanying drawings. It is emphasized that, in accordance with standard industry practice, many features are not drawn to scale. In fact, the dimensions of various components may be arbitrarily enlarged or reduced for clarity of discussion.

1A and 1B are a top view and a cross-sectional schematic diagram of a conventional display panel in a lamination manufacturing process;

2 is a three-dimensional view of the sealant structure, the glue spreading area and the second substrate drawn on the first substrate according to the embodiment of the present invention;

3A and 3B are a top view and a schematic cross-sectional view of the sealant structure drawn on the first substrate according to the first embodiment of the present invention;

4A and 4B are a top view and a schematic cross-sectional view of the sealant structure drawn on the first substrate according to the second embodiment of the present invention;

5A and 5B are a top view and a schematic cross-sectional view of the sealant structure drawn on the first substrate according to the third embodiment of the present invention;

6A and 6B are schematic diagrams of the process of pouring liquid optical adhesive (LOCA) depicted in FIG. 4A;

7A and 7B are a top view and a schematic cross-sectional view according to an embodiment of the present invention.

Symbol Description

102～LCD module;

104～cover glass;

106～frame glue;

108～liquid optical glue;

108a ~ glue overflow;

110～Bubble;

112～sealing glue;

202～the first substrate;

204 to the second substrate;

210～Exhibition area;

220～frame glue structure;

222～frame colloid;

222a～notch;

224～Retaining wall structure;

2241 ~ strip retaining wall;

226 ~ diversion groove;

226a ~ exhaust port;

230～ink layer;

240～liquid optical glue;

d～gap (width);

w ~ width.

Detailed ways

The following content provides various embodiments or examples. If it is mentioned in the description that the first part is formed on the second part, it may include an embodiment in which the first and second parts are in direct contact, and may also include additional parts. Embodiments formed between the first and second parts such that the first and second parts are not in direct contact. Additionally, embodiments of the present invention may use repeated reference numerals in many instances. These repetitions are for simplicity and clarity only and do not represent a specific relationship between the various embodiments and/or configurations discussed.

Furthermore, spatially related terms, such as "above", "below", "above", "below" and in addition to the orientation shown in the drawings, also include use or operation. different orientations of the device. When the device is rotated to other orientations (rotated 90 degrees or other orientations), then the spatially relative descriptions used herein can also be interpreted in accordance with the rotated orientation.

Here, the terms "about", "approximately" and "approximately" generally mean within 20%, preferably within 10%, and more preferably within 5% of a given value or range, or within 3% Within %, or within 2%, or within 1%, or within 0.5%. It should be noted that the quantities provided in the specification are approximate quantities, that is to say, “about”, “approximately” and “approximately” can still be implied without the specific description of “about”, “approximately” and “approximately”. roughly" meaning.

The embodiment of the present invention provides a sealant structure with a guide groove, so as to solve the problem of uneven colloid caused by air bubbles, overflowing glue, etc. after sealing, which leads to poor appearance. This type of sealant structure is particularly suitable for non-planar 3D lamination.

First, as shown in FIG. 2 , in order to provide the sealant structure 220 in the lamination process, the first substrate 202 and the second substrate 204 are adhered and fixed, and a liquid optical adhesive (LOCA) (not shown) for preventing subsequent pouring ) spills over. The first substrate 202 and the second substrate 204 can be made of materials such as glass, plastic, metal, etc. For display devices, they can be cover glass (CG), touch panel, liquid crystal display, liquid crystal display module (LCM), etc. , which can be matched with each other depending on the situation. For example, in one embodiment, the first substrate 202 is a display panel and the second substrate 204 is a touch panel. In another embodiment, the first substrate 202 is a liquid crystal display module (LCM) and the second substrate 204 is a cover glass (CG).

Continuing to refer to FIG. 2 , the first substrate 202 includes an adhesive spreading area 210 and a sealant structure 220 , wherein the adhesive spreading area 210 serves as a pouring and flowing area of liquid optical adhesive (LOCA) (not shown) and the sealant structure 220 serves as a preventing Areas of liquid optical adhesive (LOCA) spillage. The aforementioned sealant structure 220 is generally disposed around the inner edge of the first substrate 202 . In one embodiment, the adhesive spreading area in the sealant structure 220 should be larger than the functional area of the first substrate 202 , so as to reduce the influence of the structural adhesive on the function of the first substrate 202 . In one embodiment, the adhesive spreading area in the sealant structure 220 accounts for at least more than 80% of the area of the first substrate 202 , so as to increase the bonding area of the first substrate 202 and the second substrate 204 .

3A and 3B illustrate the sealant structure according to the first embodiment of the present invention. FIG. 3A is a top view of the sealant structure 220 on the first substrate 202 . The sealant structure 220 surrounds between the edge of the first substrate 202 and the spreading area 210 . The sealant structure 220 may include a sealant body 222 and a retaining wall structure 224 . In the first embodiment of the present invention, the frame glue body 222 only surrounds three sides of the glue spreading area 210, and thus has a notch 222a facing the fourth side. The retaining wall structure 224 is composed of three strip-shaped retaining walls 2241. One of the strip-shaped retaining walls 2241 is located at the outer side of the gap 222a in the aforementioned sealant 222, and the other two strip-shaped retaining walls 2241 are respectively connected to the aforementioned strip-shaped retaining walls 2241. Two ends of the blocking wall 2241 are disposed parallel to the outer side of the frame rubber body 222 , and a guide groove 226 is defined between the two ends of the frame rubber body 222 . As shown in the figure, the frame compound 222 and the retaining wall structure 224 do not intersect. In addition, the gap d between the two ends of the frame glue body 222 and the retaining wall structure 224 is about 2 mm to 10 mm. The gap in this interval is sufficient to allow excess optical liquid glue to flow out and define a diversion groove with a buffer function. 226.

Continuing to refer to FIG. 3A , two diversion grooves 226 are defined between the frame rubber body 222 and the retaining wall structure 224 , located on opposite sides of the glue spreading area 210 , which can extend the exhaust channel and also serve as a buffer for overflowing glue. In addition, in this embodiment, the air outlet 226a is defined at the position of the guide groove 226 away from the notch 222a. The air outlet 226a is adjacent to the corner of the first substrate 202 to facilitate the discharge of air bubbles.

Referring to FIG. 3B, FIG. 3B is a schematic cross-sectional view along the line segment A'-A" of FIG. 3A. The frame compound 222 and the retaining wall structure 224 are arranged on the first substrate 202, wherein the first substrate 202 is a plane, and the frame compound 222 and The heights of the retaining wall structures 224 are approximately the same. A diversion groove 226 is defined between the frame compound 222 and the retaining wall structure 224. The diversion groove 226 can not only prevent the liquid optical adhesive (LOCA) (not shown) from overflowing, but also prevent The glue-filling bubbles are accumulated in the glue-spreading area 210 .

4A and 4B illustrate a sealant structure according to a second embodiment of the present invention. FIG. 4A is a top view of the sealant structure 220 on the first substrate 202 . The sealant structure 220 surrounds between the edge of the first substrate 202 and the spreading area 210 . The sealant structure 220 may include a sealant body 222 and a retaining wall structure 224 . In the embodiment of the present invention, the frame glue body 222 surrounds the four sides of the glue spreading area 210 and has a gap 222a. The retaining wall structure 224 is a strip-shaped retaining wall 2241 , which is located at the inner side of the gap 222 a in the aforementioned frame compound 222 , and the frame compound 222 and the retaining wall structure 224 do not intersect. In one embodiment, the aforementioned notch 222a is disposed on the centerline (not shown) of the glue spreading area 210 . The gap d between the two ends of the strip-shaped retaining wall in the retaining wall structure 224 and the frame glue 222 is approximately between 2 mm and 10 mm. The gap in this interval is sufficient to allow the excess optical liquid glue to flow out and define a buffer function. The guide groove 226.

Please refer to FIGS. 4A and 4B at the same time. FIG. 4B is a schematic cross-sectional view of FIG. 4A along the line A'-A". A diversion groove 226 is defined between the frame compound 222 and the retaining wall structure 224, and is located inside the frame compound 222. , the exhaust channel can be extended, and it is also used as a buffer for overflowing glue. Also, in this embodiment, the aforementioned gap 222a is also used as an exhaust port 226a here, and the exhaust port 226a is located at the highest point on the sealant structure 220, and there are It is helpful for the discharge of air bubbles. Since in this embodiment, the first substrate 202 is convex, the aforementioned exhaust port 226a is located at the midpoint and the highest point when the first substrate 202 is laid flat.

5A and 5B illustrate a sealant structure according to a second embodiment of the present invention. FIG. 5A is a top view of the sealant structure 220 on the first substrate 202 . The sealant structure 220 surrounds between the edge of the first substrate 202 and the spreading area 210 . The sealant structure 220 may include a sealant body 222 and a retaining wall structure 224 . In the embodiment of the present invention, the frame glue 222 surrounds the four sides of the glue spreading area 210 and has a pair of notches 222a. The retaining wall structure 224 is a pair of strip-shaped retaining walls 2241 , which are located at the outer side of the aforesaid notches 222 a in the aforesaid sealant body 222 and are arranged in parallel. As shown in the figure, the frame compound 222 and the retaining wall structure 224 do not intersect. The aforementioned notches 222 a are disposed on the center line (not shown) of the glue spreading area 210 , and are correspondingly disposed on opposite sides of the glue spreading area 210 . In addition, the width d of the aforesaid gap 222a is about 2mm to 10mm. The gap 222a in this width range is sufficient to allow excess optical liquid glue (not shown) to flow out and define a diversion groove 226 with a buffer function.

Continuing to refer to FIG. 5A, FIG. 5B is a schematic cross-sectional view of FIG. 5A along the line A'-A". Two diversion grooves 226 are defined between the frame compound 222 and the retaining wall structure 224, which are located outside the frame compound 222 and can extend the row The air channel is also used as a buffer for overflowing glue. Also, in this embodiment, an outlet 226a is defined at the guide groove 226 away from the gap 222a. It is helpful for the discharge of air bubbles. Since in this embodiment, the first substrate 202 can be concave, the aforementioned exhaust port 226a is adjacent to the corner of the first substrate 202 .

After the sealant structure 220 is disposed on the first substrate 202, the second substrate 204 can be aligned, and then liquid optical adhesive (LOCA) (not shown) is injected away from the exhaust port 226a, so that the sealant structure is filled with Liquid optical adhesive (LOCA) is applied to make the first substrate 202 and the second substrate 204 fit together, and finally a sealing adhesive (not shown) is selected and disposed in the guide groove 226 according to the type of the injected liquid optical adhesive (LOCA). For example, if the fluidity of the injected liquid optical adhesive (LOCA) is high, the sealant is used as the sealant; if the fluidity of the injected liquid optical adhesive (LOCA) is low, the liquid optical adhesive (LOCA) is used as the sealant.

For example, referring to FIG. 6A , using the sealant structure 222 on the first substrate 202 in the second embodiment (as shown in FIGS. 4A-4B ), after assembling the first substrate 202 and the second substrate 204 , the The opposite side of the notch 222a is filled with liquid optical adhesive (LOCA) 240. In this embodiment, the liquid optical adhesive (LOCA) 240 gradually fills the adhesive spreading area 210 from the distal end of the gap 222a until the excess liquid optical adhesive (LOCA) 240 is guided into the guide groove 226 and discharged toward the gap 222a, such as shown in Figure 6B.

In addition, referring back to FIGS. 3A to 5A , the width w of the diversion groove 226 in the sealant structure 220 is approximately between 1 mm and 5 mm, and less than 1 mm will reduce the buffering effect of the diversion groove, which is easier than the sealant structure. An overflow occurs outside, and if it is larger than 5 mm, the glue spreading area 210 will be too small, so that the bonding area will decrease.

In some embodiments, an ink layer (not shown) may be further disposed on the second substrate 204 so that the ink layer is interposed between the sealant structure 220 and the second substrate 204 . The above ink layer can prevent the sealant structure 220 from being exposed, and will not affect the visible area.

As shown in FIGS. 7A and 7B , in the second embodiment (as shown in FIGS. 4A to 4B ), after the first substrate 202 is provided with the sealant structure 220 and the second substrate 204 is provided with the ink layer 230 , the first substrate 204 is provided with an ink layer 230 . 202 and the second substrate 204 are paired, so that the sealant structure 220 and the ink layer 230 are interposed between the first substrate 202 and the second substrate 204 . FIG. 7A is a top view of the second substrate 204. Since FIG. 7A is based on FIG. 4A and further includes an ink layer 230, the same parts as those in FIG. 4A are not repeated here.

Referring to FIG. 7A , through a partial perspective view under the ink layer 230 , the sealant structure 220 under the ink area 230 can be seen, as shown in FIG. 4A . The ink layer 230 located on the sealant structure 220 can completely cover the sealant structure 220, but does not affect the visible area. The liquid optical adhesive (LOCA) 240 located in the adhesive spreading area 210 is used to bond the first substrate 202 and the second substrate 204 together. Since in this embodiment, the first substrate 202 and the second substrate 204 are respectively a liquid crystal display module (LCM) and a cover glass (CG), the configuration under the second substrate 204 can still be seen in the top view.

Referring to FIG. 7B , FIG. 7B is a schematic cross-sectional view of FIG. 7A along the line segment A'-A". In this embodiment, both the first substrate 202 and the second substrate 204 are convex, and the height of the frame glue 222 and the ink layer 230 is About the same, but not limited to this. Also, the purpose of the ink layer 230 is to cover the sealant structure 220 below, and the boundary of the ink layer 230 can be just the same as the boundary of the sealant structure 220, or it can extend to the glue spreading area 210, The premise is that the visible area is not affected. In addition, since the sealant structure is based on FIG. 4A and FIG. 4B , the process of injecting the liquid optical adhesive (LOCA) 240 is the same as that shown in FIG. 6A and FIG.

The sealant structure in the embodiment of the present invention includes a sealant with a gap and a retaining wall structure on one side of the gap, and a diversion groove can be defined between the sealant and the retaining wall structure, which can extend the exhaust channel, and also As a buffer for overflowing glue, its effect is more obvious in 3D devices, and it can improve the bonding yield.

The components of several embodiments are summarized above so that those with ordinary knowledge in the technical field to which the present invention pertains may better understand the point of view of the embodiments of the present invention. Those with ordinary knowledge in the technical field to which the present invention pertains should understand that they can easily design or modify other fabrication processes and structures based on the embodiments of the present invention to achieve the same purpose and/or the same purpose as the embodiments introduced herein. Advantage. Those with ordinary knowledge in the technical field to which the present invention pertains should also understand that such equivalent structures do not depart from the spirit and scope of the present invention, and they can be made in various forms without departing from the spirit and scope of the present invention. such changes, substitutions and substitutions. Therefore, the protection scope of the present invention should be defined by the appended claims.

Claims (16)

1. A frame glue structure is characterized by comprising:

the frame glue body is arranged between the first substrate and the second substrate, and surrounds at least three edges of a glue spreading area, wherein the frame glue body is provided with at least one notch; and

and the retaining wall structure is arranged on one side of the notch and extends along at least one edge of the glue spreading area, wherein a diversion trench is defined between the retaining wall structure and the glue body.

2. The sealant structure according to claim 1, wherein the notch is disposed on a center line of the sealant spreading region.

3. The sealant structure according to claim 1, wherein the retaining wall structure is disposed outside the sealant body.

4. The sealant structure according to claim 1, wherein the sealant frame includes a pair of notches correspondingly disposed on two opposite sides of the sealant spreading region.

5. The sealant structure according to claim 4, wherein the retaining wall structure comprises a pair of strip-shaped retaining walls disposed on the outer sides of the notches of the sealant.

6. The sealant structure according to claim 1, wherein the retaining wall structure is disposed inside the sealant body.

7. The sealant structure according to claim 1, wherein the retaining wall structure comprises a strip-shaped retaining wall disposed inside the notch of the sealant body.

8. The sealant structure according to claim 1, wherein the retaining wall structure extends along three sides of the sealant spreading region, and the guiding grooves are defined on two opposite sides of the sealant spreading region and the retaining wall structure.

9. The sealant structure according to claim 1, wherein the guiding groove defines at least one air outlet away from the notch, and the air outlet is adjacent to a corner of the first substrate.

10. The sealant structure according to claim 1, wherein at least one of the first substrate and the second substrate is a curved surface.

11. The sealant structure according to claim 1, wherein the first substrate and the second substrate are a liquid crystal display module and a cover glass, respectively.

12. The sealant structure according to claim 1, wherein the first substrate and the second substrate are a display panel and a touch panel, respectively.

13. The sealant structure according to claim 1, wherein the width of the gap is between 2mm to 10 mm.

14. The sealant structure according to claim 1, wherein the width of the guiding groove is between 1mm and 5 mm.

15. The sealant structure according to claim 1, further comprising a Liquid optical adhesive (LOCA) disposed in the sealant structure.

16. The sealant structure according to claim 1, further comprising a sealing sealant disposed in the flow-guiding groove.

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