Cover plate glass and screen opposite pasting method

Abstract

The invention provides a method for oppositely pasting cover plate glass and a screen, which comprises the following steps: a circle of rubber ring is pasted on one surface to be pasted of the cover plate glass or one surface to be pasted of the screen, the outer edge of the rubber ring is flush with the edge of a display area, the rubber ring is optical cement which is not completely cured, and the rubber ring is made of the optical cement which is not completely cured; the other surface of the rubber ring is provided with a light-transmitting interlayer with a certain thickness, and the light-transmitting interlayer can reduce the light transmittance; coating an optical adhesive layer of which the curing degree is lower than that of the rubber ring on the to-be-laminated surface of the cover plate glass or the to-be-laminated surface of the screen and on the inner side of the rubber ring; the rubber ring and the optical adhesive layer are subjected to illumination pre-curing at the same time, and the illumination direction of curing light faces the to-be-attached face so that the curing light can penetrate through the light-transmitting interlayer and then irradiate the rubber ring; and after the light-transmitting interlayer is removed, the cover plate glass and the screen are oppositely pasted. According to the invention, linear bright spots or linear dark fringes generated after the screen and the cover plate glass are oppositely pasted can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of screen and cover glass lamination, and in particular to a lamination method capable of reducing linear bright spots or linear dark lines generated after the screen and cover glass are laminarized. Background Art

[0002] The cover glass and the screen need to be pre-pasted together before being assembled to the electronic device. Most of the existing technologies use optical double-sided tape to stick to the cover glass or screen, and then stick the cover glass and the screen together. Since the display area of ​​the screen is large and the double-sided tape has poor fluidity, if the entire display area is covered with double-sided tape, the double-sided tape is prone to wrinkles during bonding. Therefore, there is also a part of the technology that applies flowing glue on the cover glass or screen, and then pre-cures it before pasting. Since existing electronic devices pursue narrow-frame technology, the display area of ​​the screen almost occupies the entire screen, and the non-display area is on the periphery of the display area, and its width is very small. When applying glue, it is easy for the glue to overflow into the non-display area or even outside the screen, resulting in the side and the other side of the screen being stained with glue, which is not conducive to subsequent production and processing. Summary of the Invention

[0003] Therefore, it is necessary to provide a method for laminating a screen and a cover glass that can reduce linear bright spots or linear dark lines generated after laminating the screen and the cover glass.

[0004] The present invention provides a method for laminating a cover glass to a screen, the method comprising:

[0005] A rubber ring is attached to the side of the cover glass or the screen to be attached, wherein the outer edge of the rubber ring is flush with the edge of the display area. The rubber ring is an uncured optical adhesive. A light-transmitting interlayer of a certain thickness is provided on the other side of the rubber ring to reduce light transmittance.

[0006] Applying a layer of optical adhesive with a lower curing degree than the rubber ring to the side of the cover glass or the side of the screen to be bonded and on the inner side of the rubber ring;

[0007] Simultaneously pre-curing the rubber ring and the optical adhesive layer with light, wherein the curing light is directed toward the side to be bonded so that the curing light passes through the light-transmitting spacer and then irradiates the rubber ring;

[0008] After removing the light-transmitting spacer, the cover glass is attached to the screen.

[0009] Furthermore, the transmittance of the light-transmitting spacer is set so that when the rubber ring and the optical adhesive layer are pre-cured for a predetermined time by the curing light of predetermined energy, the final curing degree of the rubber ring and the optical adhesive layer can be the same.

[0010] Furthermore, when the optical adhesive layer is coated, the thickness of the optical adhesive layer is not less than the overall thickness of the rubber ring and the light-transmitting spacer.

[0011] Furthermore, when the optical adhesive layer is coated, the thickness of the optical adhesive layer is equal to the overall thickness of the adhesive ring and the light-transmitting spacer.

[0012] The method provided by the present invention is to pre-attach a circle of rubber ring, and the outer edge of the rubber ring is flush with the edge of the display area. The rubber ring is an uncured optical adhesive, and the other side of the rubber ring is provided with a light-transmitting spacer with a certain thickness. Then, a layer of optical adhesive layer with a lower curing degree than the rubber ring is applied to the side of the cover glass to be bonded or the side of the screen to be bonded and on the inner side of the rubber ring. Then, the rubber ring and the optical adhesive layer are simultaneously pre-cured by light. After that, the light-transmitting spacer is removed and the cover glass and the screen are bonded together.

[0013] The beneficial effects of the present invention are specifically as follows: the rubber ring of the present invention is pasted in the display area, and there is no need to consider the width of the non-display area. A rubber ring with a larger width can be appropriately used. The light-transmitting interlayer can prevent the subsequent optical glue from overflowing into the non-display area, and can also reduce the transmittance. In the subsequent light pre-curing process, the curing light can be reduced from irradiating the rubber ring. Therefore, when applying the glue, since the rubber ring is an uncured optical glue, the coated optical glue layer will be better integrated with the rubber ring. In the pre-curing process, due to the provision of the light-transmitting interlayer, the curing speed of the optical glue layer is greater than the curing speed of the rubber ring, and ultimately the curing degree of the optical glue layer and the rubber ring can be closer, and the consistency of the various properties of the optical glue layer and the rubber ring (such as fluidity, viscosity, etc.) during pasting is better, and the pasting effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the screen structure from a top view.

[0015] Figure 2 For Figure 1 The diagram shows a top view of the screen after a circle of rubber ring is attached to it.

[0016] Figure 3 This is a cross-sectional view of the present invention after coating the optical adhesive layer.

[0017] Figure 4 This is a cross-sectional view of the present invention after the light-transmitting interlayer is removed and the bonding is performed. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of screen 100, which includes a display area 10 and a non-display area 20. The display area 10 occupies almost the entire screen 100, while the non-display area 20 is located on the periphery of the display area 10 and has a very small width. If flowable glue is applied to the cover glass 200 or screen 100 and then pre-cured before laminating, the glue can easily overflow into the non-display area 20 or even outside the screen 100, resulting in glue staining the sides and other surfaces of the screen 100, which is detrimental to subsequent production and processing.

[0020] In view of the above problems, a specific embodiment of the present invention provides a method for attaching a cover glass 200 to a screen 100, the method comprising:

[0021] S10: Glue a circle of rubber ring 30 on the side of the cover glass 200 to be bonded or the side of the screen 100 to be bonded.

[0022] like Figure 2-Figure 4 As shown, the outer edge of the rubber ring 30 is flush with the edge of the display area 10. The rubber ring 30 is an optical glue that is not fully cured. The other side of the rubber ring 30 is provided with a light-transmitting spacer 40 with a certain thickness. The light-transmitting spacer 40 can reduce the transmittance.

[0023] S20: Coating a layer of optical adhesive layer 40 having a lower curing degree than the rubber ring 30 on the side of the cover glass 200 to be bonded or the side of the screen 100 to be bonded and on the inner side of the rubber ring 30 .

[0024] During the coating process, excess optical adhesive will flow onto the light-transmitting spacer 40 .

[0025] S30: Pre-curing the rubber ring 30 and the optical adhesive layer 40 by light simultaneously.

[0026] Among them, such as Figure 3 As shown, the curing light is directed toward the side to be bonded so that the curing light passes through the light-transmitting barrier 40 and then irradiates the rubber ring 30 .

[0027] S40: removing the light-transmitting spacer 40.

[0028] S50: Attach the cover glass 200 to the screen 100.

[0029] The rubber ring 30 of the present invention is adhered to the display area 10 without considering the width of the non-display area 20. A rubber ring 30 with a larger width can be appropriately used. The light-transmitting interlayer 40 can prevent the subsequent optical glue from overflowing into the non-display area 10, and can also reduce the transmittance. In the subsequent light pre-curing process, the curing light can be reduced from penetrating the rubber ring 30. Therefore, when applying the glue, since the rubber ring 30 is an uncured optical glue, the coated optical adhesive layer 40 will be better integrated with the rubber ring 30. During the pre-curing process, due to the provision of the light-transmitting interlayer 40, the curing speed of the optical adhesive layer 40 is greater than the curing speed of the rubber ring 30, and ultimately the curing degree of the optical adhesive layer 40 and the rubber ring 30 can be closer. When pasting, the consistency of the various properties (such as fluidity, viscosity, etc.) of the optical adhesive layer 40 and the rubber ring 30 is better, and the pasting effect is better. Further, it can avoid the generation of linear bright spots or linear dark lines due to refraction at the junction of the optical adhesive layer 40 and the rubber ring 30 when the screen 100 is lit.

[0030] In this embodiment, the light transmittance of the light-transmitting spacer 40 is set such that, when the curing light of predetermined energy is simultaneously applied to the rubber ring 30 and the optical adhesive layer 40 for a predetermined period of time, the rubber ring 30 and the optical adhesive layer 40 are ultimately cured to the same degree. This ensures that the optical adhesive layer 40 and the rubber ring 30 have the same degree of curing, and that the properties (e.g., fluidity, viscosity, etc.) of the optical adhesive layer 40 and the rubber ring 30 are substantially consistent during lamination.

[0031] In this embodiment, the light transmittance of the light-transmitting spacer 40 is set such that, when the optical adhesive layer 40 is coated with the curing light having a predetermined energy, the thickness of the optical adhesive layer 40 is not less than the combined thickness of the adhesive ring 30 and the light-transmitting spacer 40. Furthermore, when the optical adhesive layer 40 is coated, the thickness of the optical adhesive layer 40 is equal to the combined thickness of the adhesive ring 30 and the light-transmitting spacer 40.

[0032] The optical adhesive layer 40 is located in the middle of the rubber ring 30. After removing the light-transmitting spacer 40, the height h1 of the optical adhesive layer 40 is higher than the height h2 of the rubber ring 30. When the cover glass 200 and the screen 100 are attached to each other, they will first start from the optical adhesive layer 40 and then gradually move outward to the rubber ring 30. Since the height h1 of the optical adhesive layer 40 is higher than the height h2 of the rubber ring 30, bubbles will be discharged from the rubber ring 30 (the discharge direction can be referred to Figure 4 As shown), the deposition of bubbles at the edge is reduced, the lamination effect is better, and the part of the glue that is not fully cured and squeezed out of the optical adhesive layer 40 due to lamination will fill the gap above the rubber ring 30, preventing the optical adhesive layer 40 from flowing directly to the non-display area 20.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for laminating a cover glass to a screen, characterized in that: The method comprises: A rubber ring is attached to the side of the cover glass or the screen to be attached, wherein the outer edge of the rubber ring is flush with the edge of the display area. The rubber ring is an uncured optical adhesive. A light-transmitting interlayer of a certain thickness is provided on the other side of the rubber ring to reduce light transmittance. Applying a layer of optical adhesive with a lower curing degree than the rubber ring to the side of the cover glass or the side of the screen to be bonded and on the inner side of the rubber ring; Simultaneously pre-curing the rubber ring and the optical adhesive layer with light, wherein the curing light is directed toward the side to be bonded so that the curing light passes through the light-transmitting spacer and then irradiates the rubber ring; After removing the light-transmitting spacer, the cover glass is attached to the screen.

2. The method for laminating cover glass to screen according to claim 1, wherein: The light transmittance of the light-transmitting spacer is set to: when the rubber ring and the optical adhesive layer are pre-cured for a predetermined time by the curing light of predetermined energy, the final curing degree of the rubber ring and the optical adhesive layer can be the same.

3. The method for laminating cover glass to screen according to claim 1, wherein: When the optical adhesive layer is coated, the thickness of the optical adhesive layer is not less than the overall thickness of the adhesive ring and the light-transmitting spacer.

4. The method for laminating cover glass to screen according to claim 3, wherein: When the optical adhesive layer is coated, the thickness of the optical adhesive layer is equal to the overall thickness of the adhesive ring and the light-transmitting spacer.

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