An assembly method for assembling and bonding flat LCDs into curved display and integrated screen

Abstract

The present invention discloses an assembly method and an integrated screen for assembling and bonding a flat LCD into a curved display, the method comprising: extracting a flat LCD to be bent; using a curved fixture to bend the flat LCD into a target curvature, the curved fixture being equipped with a strong curved suction cup; using a double-sided adhesive with strong viscosity to fix the bent LCD on a curved backlight assembly with a target curvature to form an LCM display module; wrapping a circle of adhesive tape evenly around the LCM display module, loosening the strong curved suction cup, and removing the curved fixture from the LCM display module; and fully bonding the fixed LCM display module to the curved CG with the target curvature with optical adhesive. The method provided by the present invention realizes bending a flat LCD into a target curvature, solves the problem of rebound tension of the flat LCD, enables the flat LCD to always maintain the target curvature, and realizes a curved 3D touch display.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid crystal display device production, and in particular to an assembly method for assembling and bonding flat LCDs into a curved display and an integrated screen. Background Art

[0002] Curved displays have a beautiful curved appearance, a wide viewing angle, and the distance from each point on the screen to the eye is equal, which can eliminate visual distortion at the edge of the screen and create a natural and comfortable viewing experience. With the continuous advancement of technology, curved displays are widely used in mobile phones, notebooks, TVs, cars, etc., with broad market prospects, and efficient and easy-to-operate display bonding technology is becoming increasingly important.

[0003] In the existing bonding technology, there are two main bonding methods for the glass cover plate and the display module: full bonding and non-full bonding. Non-full bonding, also known as frame bonding, is the use of double-sided tape to directly bond the glass cover plate and the display module together. However, there is an air layer in the middle of the product after bonding in this way, and the display effect is not good after refraction of light. Full bonding refers to the use of OCR water glue, OCA optical glue or UV glue to seamlessly bond the glass cover plate and the display module. This bonding method does not have an air layer, and can provide better display effects and higher screen strength.

[0004] With the continuous development of electronic products, consumers have more and more diverse requirements for electronic display products, and the more technologically advanced curved 3D touch display is favored by consumers. Due to the technical difficulties in the production and manufacturing of curved LCDs, the curved 3D touch display has poor performance, and the reliability, display effect and production yield cannot reach mass production performance. Therefore, 3D touch display has been stuck in the production technology of curved 3D LCDs and has not been released yet. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned defects in the prior art, and to provide an assembly method and an integrated screen for assembling and bonding a flat LCD into a curved display, thereby simplifying the bonding process of a flat LCD on a curved 3D surface, and providing a bonding method with low equipment investment and high yield rate, while solving the problems of bending a flat LCD into a target curvature and the rebound tension of the flat LCD, so that the flat LCD can always maintain the target curvature.

[0006] To achieve the above object, the present invention provides a method for assembling and bonding a flat LCD into a curved display, comprising:

[0007] S1: extract a flat LCD to be bent;

[0008] S2: Bend the flat LCD into a target curvature using a curved surface fixture, wherein a strong curved surface suction cup is installed on the curved surface fixture;

[0009] S3: using a double-sided adhesive with strong adhesiveness to fix the curved LCD on a curved backlight assembly with a target curvature to form an LCM display module;

[0010] S4: Wrap a circle of tape evenly around the LCM display module, loosen the strong curved suction cup, and remove the curved fixture from the LCM display module;

[0011] S5: Fully bond the fixed LCM display module to the curved CG with the target curvature using optical glue.

[0012] Preferably, the curved fixture and the curved backlight assembly have the same curvature radius.

[0013] Preferably, the flat LCD is flexible.

[0014] Preferably, the strong curved surface suction cup is provided with a plurality of suction nozzles.

[0015] Preferably, the curved surface CG is a non-planar cover plate, the non-planar cover plate is in an arc or spherical shape as a whole, and the contact surface between the curved surface CG and the LCM display module is in an arc or spherical shape.

[0016] Preferably, the curved surface CG is a protective glass.

[0017] Preferably, the LCM display module consists of a flat LCD and a curved backlight assembly, and the flat LCD is located between the curved CG and the curved backlight assembly.

[0018] Preferably, the optical adhesive is a liquid optical adhesive layer.

[0019] The present invention also provides an integrated screen for assembling and bonding a flat LCD into a curved display. The integrated screen is made using the above-mentioned assembly method for assembling and bonding a flat LCD into a curved display. The integrated screen includes an LCM display module and a curved surface CG with a target curvature. The LCM display module and the curved surface CG are connected by optical glue. The LCM display module and the curved surface CG have the same curved surface structure. The thickness of the optical glue is consistent. The LCM display module includes a flat LCD and a curved backlight assembly. The flat LCD and the curved backlight assembly are connected by double-sided glue with strong adhesion. The flat LCD and the curved backlight assembly have the same curved surface structure.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) The production technology bottleneck of curved 3D LCD has not been overcome yet. Using flat LCD to realize curved 3D touch display can bypass the technical bottleneck of curved 3D LCD and realize curved 3D touch display in a more direct and simpler way, thus seizing the market opportunity.

[0022] (2) The curved backlight assembly with the target curvature and the curved surface CG with the target curvature sandwich the flat LCD bent into the target curvature in the middle, playing a fixing role, so that the flat LCD maintains the target curvature for a long time, thereby realizing the flat LCD curved surface 3D touch display. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a flow chart of an assembly method for assembling and bonding a flat LCD into a curved display provided in the first embodiment;

[0025] Figure 2 It is a structural schematic diagram of an assembly process of an assembly method for assembling and bonding a flat LCD into a curved display provided in the first embodiment;

[0026] Figure 3 This is a schematic diagram of the structure of an integrated screen that attaches a flat LCD to a curved 3D surface, provided in the second embodiment.

[0027] Included in the figure are:

[0028] 1-Flat LCD, 2-Curved fixture, 21-Curved suction cup, 3-Double-sided tape, 4-Adhesive tape, 5-Curved backlight set, 6-Optical glue, 7-Curved CG, 8-LCM display module. DETAILED DESCRIPTION

[0029] The technical scheme in this embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in this embodiment of the present invention. Obviously, the described embodiment is one embodiment of the present invention, not all embodiments of the present invention. Based on this embodiment of the present invention, all other embodiments of the present invention obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1

[0031] Please refer to Figure 1 and Figure 2The first embodiment provides a method for assembling a flat LCD into a curved display, comprising the following steps:

[0032] S1: extract a flat LCD1 to be bent.

[0033] Specifically, a flat LCD 1 to be bent is taken out, the flat LCD 1 is inspected before bending, the flat LCD 1 is wiped around with a dust-free cloth to remove dust and foreign matter, and the flat LCD 1 is placed on the curved surface jig 2 .

[0034] S2: Bend the flat LCD 1 into a target curvature using a curved surface fixture 2 , wherein a strong curved surface suction cup 21 is installed on the curved surface fixture 2 .

[0035] Specifically, the flat LCD 1 is placed on the curved jig 2, and the flat LCD 1 is transformed into a curved structure with the same curvature as the target arc through the strong curved suction cup 21 installed on the curved jig 2, forming a full-surface-to-curved bonding method, which can simplify the difficulty of full-surface bonding with the curved surface of the backlight assembly 5 and improve the bonding efficiency.

[0036] S3: using a double-sided adhesive tape 3 with strong adhesiveness to fix the curved LCD 1 on a curved backlight assembly 5 with a target curvature, so as to form an LCM display module 8.

[0037] Specifically, the double-sided adhesive tape 3 can be implemented by a glue dispensing device or a manual glue application process. The double-sided adhesive tape 3 not only serves to firmly fix the curved LCD 1 on the backlight assembly 5, but also serves to keep the curved LCD 1 at a target curvature.

[0038] S4: wrap a circle of adhesive tape 4 evenly around the LCM display module 8, release the strong curved suction cup 21, and remove the curved fixture 2 from the LCM display module 8.

[0039] Specifically, the function of the adhesive tape 4 is to prevent air from entering between the curved LCD 1 and the backlight assembly 5 during the process of removing the jig, thereby forming an air layer, which makes the curved LCD 1 and the backlight assembly 5 not in firm contact and causes defective products.

[0040] S5: Fully bond the fixed LCM display module 8 to the curved surface CG7 with the target curvature using the optical adhesive 6.

[0041] Specifically, the optical glue 6 can be implemented by a glue dispensing device, the optical glue 6 is a liquid optical glue, the liquid optical glue is a conventional liquid optical glue, and the optical glue 6 is an OCA optical glue. The pre-curing of the optical glue 6 can be implemented by a heating device, and the pre-curing process can solve the problem of glue overflow before and during the bonding process.

[0042] The optical glue 6 is placed between the curved surface CG7 and the LCM display module 8. The curved surface CG7 and the LCM display module 8 have a curved surface structure with the same curvature. The curved surface CG7 and the LCM display module 8 are fully bonded to form an integrated screen.

[0043] The curved backlight assembly 5 with the target curvature and the curved surface CG7 with the target curvature sandwich the flat LCD1 bent into the target curvature in the middle, playing a fixing role, so that the flat LCD1 maintains the target curvature for a long time, thereby realizing the curved 3D touch display of the flat LCD1.

[0044] The curved surface fixture 2 and the curved surface backlight assembly 5 have the same curvature radius.

[0045] The flat LCD 1 is flexible and can be bent into a target curvature.

[0046] The strong curved suction cup 21 is provided with a plurality of suction nozzles, and the function of the plurality of suction nozzles is to bend the flat LCD 1 to a target curvature. The plurality of suction nozzles can make the force more uniform and prevent damage caused by stress concentration.

[0047] The curved surface CG7 is a non-planar cover plate, which is in an arc or spherical shape as a whole, and the contact surface between the curved surface CG7 and the LCM display module 8 is in an arc or spherical shape.

[0048] The curved surface CG7 is a protective glass.

[0049] The LCM display module 8 is composed of a flat LCD 1 and a curved backlight assembly 5 , and the flat LCD 1 is located between the curved surface CG 7 and the curved backlight assembly 5 .

[0050] The curved backlight assembly 5 with the target curvature and the curved surface CG7 with the target curvature sandwich the flat LCD1 bent into the target curvature in the middle, playing a fixing role, so that the flat LCD1 maintains the target curvature for a long time, thereby realizing the curved 3D touch display of the flat LCD1.

[0051] In summary, the beneficial effects of the first embodiment are:

[0052] (1) The production technology bottleneck of curved 3D LCD has not been overcome yet. Using flat LCD to realize curved 3D touch display can bypass the technical bottleneck of curved 3D LCD and realize curved 3D touch display in a more direct and simple way, thus seizing the market opportunity.

[0053] (2) The curved backlight assembly 5 with the target curvature and the curved surface CG7 with the target curvature sandwich the flat LCD 1 bent into the target curvature in the middle, playing a fixing role, so that the flat LCD 1 maintains the target curvature for a long time, thereby realizing the curved 3D touch display of the flat LCD 1.

[0054] Embodiment 2

[0055] Please refer to Figure 3 , the second embodiment provides an integrated screen for bonding a flat LCD to a curved surface 3D, the integrated screen is made by using an assembly method for assembling and bonding a flat LCD into a curved display as described in the first embodiment, the integrated screen includes an LCM display module 8 and a curved surface CG7 having a target curvature, the LCM display module 8 is connected to the curved surface CG7 by an optical glue 6, the LCM display module 8 and the curved surface CG7 have the same curved surface structure, the optical glue 6 has the same thickness, the LCM display module 8 includes a flat LCD 1 and a curved backlight assembly 5, the flat LCD 1 and the curved backlight assembly 5 are connected by a double-sided adhesive 3 with strong adhesion, the flat LCD 1 and the curved backlight assembly 5 have the same curved surface structure.

Claims

1. A method for assembling and bonding a flat LCD into a curved display, characterized in that: include: S1: extract a flat LCD to be bent (1); S2: using a curved surface jig (2) to bend the flat LCD (1) into a target curvature, wherein the curved surface jig (2) is provided with a strong curved surface suction cup (21); S3: using a double-sided adhesive tape (3) with strong adhesiveness to fix the curved LCD (1) on a curved backlight assembly (5) having a target curvature, to form an LCM display module (8); S4: Evenly wrap a circle of adhesive tape (4) around the LCM display module (8), loosen the strong curved suction cup (21), and remove the curved fixture (2) from the LCM display module (8); S5: Fully bonding the fixed LCM display module (8) to the curved surface CG (7) having the target curvature using optical adhesive (6); The curved surface CG (7) is a non-planar cover plate, the non-planar cover plate as a whole is in an arc or spherical shape, the contact surface between the curved surface CG (7) and the LCM display module (8) is in an arc or spherical shape, and the curved surface CG (7) is a protective glass; The LCM display module (8) is composed of a flat LCD (1) and a curved backlight assembly (5), wherein the flat LCD (1) is located between the curved CG (7) and the curved backlight assembly (5); The curved backlight assembly (5) having a target curvature and the curved surface CG (7) having a target curvature sandwich the flat LCD (1) bent into the target curvature, thereby playing a fixing role and enabling the flat LCD (1) to maintain the target curvature for a long time, thereby realizing a curved 3D touch display of the flat LCD (1); An integrated screen is manufactured by using the method for assembling and bonding a flat LCD to form a curved display. The integrated screen comprises an LCM display module (8) and a curved surface CG (7) having a target curvature. The LCM display module (8) and the curved surface CG (7) are connected via an optical adhesive (6). The LCM display module (8) and the curved surface CG (7) have the same curved surface structure. The optical adhesive (6) has the same thickness. The LCM display module (8) comprises a flat LCD (1) and a curved backlight assembly (5). The flat LCD (1) and the curved backlight assembly (5) are connected via a double-sided adhesive (3) having strong adhesion. The flat LCD (1) and the curved backlight assembly (5) have the same curved surface structure.

2. The method for assembling a flat LCD into a curved display according to claim 1, characterized in that: The curved surface fixture (2) and the curved surface backlight assembly (5) have the same curvature radius.

3. The method for assembling a flat LCD into a curved display according to claim 1, characterized in that: The flat LCD (1) has flexibility.

4. The method for assembling a flat LCD into a curved display according to claim 1, characterized in that: The strong curved surface suction cup (21) is provided with a plurality of suction nozzles.

5. The method for assembling a flat LCD into a curved display according to claim 1, characterized in that: The optical glue (6) is a liquid optical glue layer.

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