A protective lens display screen combination with a large curvature

Abstract

A protective lens display assembly with a high degree of curvature includes a lens section and a display section. The lens section includes a rigid lens body, the inner surface of which serves as a first support surface. The first support surface includes at least one first curved surface, which is a developable surface that curves inward. The display section includes a flexible display screen and a back support. The back support is used to press or attach the flexible display screen tightly against or close to the inner side of the first support surface to form a curved shape corresponding to the first support surface. The lens section covers or is fitted onto the outer side of the display section, with a gap between them. The lens section also includes a circular polarizer, which is adhered to the first support surface to eliminate light reflection from the air interface of the gap. This protective lens display assembly can reduce the scrap of flexible displays during manufacturing, thus resulting in high manufacturing efficiency and low loss.

Description

Technical Field

[0001] The invention relates to a protective lens display screen combination, in particular to a combination of a protective lens with a large curvature and a flexible display screen, belonging to the field of display technology. Background Art

[0002] The display screen of a display device (such as a mobile phone) generally needs to be covered with a hard protective lens (such as a glass lens) to prevent it from being worn by fingers during use. In order to reduce the reflection of external light, in the combination of the protective lens and the display screen, a transparent adhesive layer is generally used to fill the gap between the protective lens and the display screen to form a fully fitted structure without an air layer.

[0003] With the emergence of flexible displays (such as flexible OLED), some people make the protective lens into a curved shape to fully fit the flexible display screen on the inner side of the protective lens to form a curved low-reflective protective lens-display combination.

[0004] With the development of mobile phones and other display devices, the curvature of such curved screens is getting larger and larger. For example, recently, not only has a "waterfall screen" appeared with two sides that are almost curved to 90° with the middle of the screen, but in the MIX-α concept phone launched by Xiaomi, its screen is even curved to the back of the phone, forming a "surround screen" design. For such a curved screen with a large curvature, the curved part of the protective lens is generally curved toward the inside (i.e., one side of the display screen), and has the characteristics of a wide curved area and a large bending angle. Therefore, during manufacturing, it will hinder the bonding operation of the flexible display screen on its inner concave surface, greatly increasing the difficulty of the full bonding process. In addition, once defects (such as wrinkles and bubbles) occur during the full bonding process, the expensive flexible display screen will be scrapped. Therefore, this protective lens display screen combination with a large curvature has low manufacturing efficiency, large losses during the manufacturing process, and it is difficult to reduce the cost of the corresponding display device. Summary of the invention

[0005] The purpose of the present invention is to provide a protective lens display screen combination with a large curvature, which can reduce the scrapping of flexible display screens during the manufacturing process, thereby having high manufacturing efficiency and low loss, and can reduce the cost of corresponding display devices. The technical scheme adopted is as follows:

[0006] A protective lens display screen combination with a large curvature, characterized by:

[0007] The lens comprises a lens part and a display part, wherein the lens part comprises a hard lens body, the inner side surface of the lens body is a first supporting surface, the first supporting surface comprises at least a first curved surface, and the first curved surface is a developable curved surface that curves inwards;

[0008] The display portion includes a flexible display screen and a back support, wherein the back support is used to make the flexible display screen close to or in close proximity to the inner side of the first support surface to form a curved shape corresponding to the first support surface;

[0009] The lens part covers or is sleeved on the outside of the display part, leaving a gap between it and the display part. The lens part also includes a circular polarizer, which is adhered to the first supporting surface and is used to eliminate the air interface reflected light in the gap.

[0010] Specifically, the lens body can be a transparent glass lens, or a hard transparent lens made of transparent organic materials such as PMMA, PC, etc., and its thickness is preferably 0.2 mm to 2.0 mm. The flexible display screen can be a flexible screen such as a flexible OLED, a flexible LCD, a flexible micro LED, etc.; generally speaking, in order to realize the touch function, the display screen can also have a touch sensing layer, such as a touch sensing layer including capacitive touch sensing electrodes.

[0011] The first curved surface as the inner side surface of the lens body is curved inward, so the first curved surface is a concave surface. Generally speaking, in the combination of the above-mentioned protective lens and the display screen, at least one of the first curved surfaces forms a surface angle greater than 85° with the main area (such as the middle area) of the first supporting surface, which can be considered to be a large degree of curvature. For example, preferably, for the design of a "waterfall screen", the two sides of the first supporting surface on the inner side of the protective lens (i.e., the first curved surface) form a surface angle of 85° to 90° with the central area, and for the "surrounding screen" design, the two sides of the first supporting surface of the protective lens wrap around to the back of the screen, and form a surface angle of 180° with the central area, which can be considered to have reached a large degree of curvature.

[0012] The back support is used to make the flexible display screen close to or against the inner side of the first support surface. Specifically, it can be a pressing component used to press the flexible display screen to the first support surface. Preferably, the back support is an elastic component such as elastic silicone, elastic foam (such as EVA).

[0013] The back support may also be a fixing component capable of fixing the flexible display screen so that it bends according to the first support surface. Preferably, the outer side surface of the back support is a second support surface, the second support surface is opposite to the first support surface, and includes a second curved surface, the second curved surface is another developable curved surface opposite to the first curved surface, and the flexible display screen is glued to the second support surface to form a curve corresponding to the second support surface; more preferably, in order to keep the gap uniform, the second support surface is formed by uniformly shrinking the first support surface to the inside. Since the second curved surface is a convex surface opposite to the concave first curved surface, the flexible display screen is pasted on the second support surface, and the process difficulty is much lower than that of pasting on the concave surface, and the second curved surface is behind the flexible display screen. Even if a small amount of bubbles and other defects are mixed between the flexible display screen and the second curved surface during pasting, it will not affect the use of the product and will not cause the display screen to be scrapped. In display devices such as mobile phones, the back support may be a shell or an internal rigid structure of the display device, such as a rigid plate having the second support surface.

[0014] The circular polarizer may include a polarizing absorption layer and a λ / 4 delay layer, wherein the polarizing absorption layer is closer to the lens body. When external light is irradiated on the combination of the protective lens and the display screen, it becomes left-handed (or right-handed) circularly polarized light after passing through the circular polarizer, and the circularly polarized light is reflected on the two interfaces of the gap air layer and becomes right-handed (or left-handed) circularly polarized light, which will be absorbed when passing through the circular polarizer, thereby eliminating the reflected light of the gap air layer and ensuring the low reflectivity of the protective lens display screen combination.

[0015] Compared with the existing design, in the combination of the protective lens and the display screen provided by the present invention, due to the anti-reflection effect of the circular polarizer, even if there is a gap and an air layer, the reflected light is very low, so there is no need to fill the gap between the lens part and the display part with a transparent adhesive layer, that is, there is no need to use full bonding between the lens part and the display part, avoiding the huge loss of the flexible display screen caused by the full bonding process. In the above preferred embodiment, even if the flexible display screen is attached to the second supporting surface, since the second supporting surface is a convex surface, the process difficulty is much lower than that of pasting on the concave surface, and it is not easy to cause the display screen to be scrapped; and although it is also difficult to attach the circular polarizer on the first supporting surface, the cost of the circular polarizer is very low. If a defect occurs, it is only necessary to tear off the polarizer and re-attach it, and the loss is not high.

[0016] The scheme of the present invention is further described below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall appearance of the protective lens display screen combination of Example 1;

[0018] Figure 2 for Figure 1 , a local schematic diagram of point A;

[0019] Figure 3 It is a schematic diagram of the components of the protective lens display screen assembly of the first embodiment;

[0020] Figure 4 It is a schematic diagram of the protective lens of Embodiments 1 and 2, and the circular polarizer thereof eliminating reflection;

[0021] Figure 5 The figure is a schematic diagram of assembling the protective lens display screen assembly of the first embodiment, wherein the arrow indicates the assembly direction of the lens part and the display part;

[0022] Figure 6 This is a schematic diagram of the overall appearance of the protective lens display screen assembly of Example 2;

[0023] Figure 7 for Figure 6 , a local schematic diagram of point B;

[0024] Figure 8 It is a schematic diagram of the components of the protective lens display screen assembly of the second embodiment;

[0025] Fig. 9 This is a schematic diagram of assembling the protective lens display screen assembly of the second embodiment, wherein the arrows indicate the assembling directions of the lens portion and the display portion. DETAILED DESCRIPTION

[0026] Embodiment 1

[0027] like Figure 1 , Figure 2 , Figure 3 As shown, the protective lens display screen assembly 100 with a "waterfall screen" design includes a lens portion 10 and a display portion 20. The lens portion 10 includes a transparent glass lens body 11 (which may also be organic glass) with a thickness of 0.5 mm (0.2 mm to 2.0 mm), and the inner side of the lens body 11 is a first support surface 12. Both sides of the lens body 11 are bent inwardly and form a surface angle of 85° to 90° with the central area, so that both sides of the first support surface 12 are first curved surfaces 121 that are bent inwardly, and the first curved surface 121 is a developable curved surface. A circular polarizer 13 is attached to the first support surface 12.

[0028] The display unit 20 includes an OLED (it may also be an LCD, QLED, or micro LED) flexible display screen 21 and a back support 22 . The back support 22 includes a curved rigid aluminum plate 221 and an EVA foam layer 222 as an elastic component. The rigid aluminum plate 221 has a curved shape consistent with the lens body 11 .

[0029] The lens portion 10 covers the outside of the display portion 20 and is fixed and pressed together by another fastening component (not shown in the figure). Under the action of the foam layer 222, the display screen 21 is pressed against the inside of the lens portion 10 and has a curved shape consistent with the lens portion 10. Although the display screen 21 is pressed against the inside of the lens portion 10, since its main area (display area) is not bonded to the lens portion 10 through the adhesive layer, there is basically a gap 30 between the display screen 21 and the circular polarizer 13, that is, there is an air layer 30.

[0030] like Figure 4 As shown, when external light 40 is irradiated onto the protective lens display screen combination, the external light 40 becomes left-handed (or right-handed) circularly polarized light 41 after passing through the circular polarizer 13. After the circular polarized light 41 is reflected on the two interfaces of the air layer in the gap 30, it becomes right-handed (or left-handed) circularly polarized light 42, which will be absorbed when passing through the circular polarizer 13 again, thereby eliminating the reflected light of the air layer in the gap 30 and ensuring the low reflectivity of the protective lens display screen combination.

[0031] The manufacturing method of the protective lens display assembly 100 includes:

[0032] (1) Paste the circular polarizer 13 onto the concave first support surface 12 to obtain the lens portion 10. If there are defects such as bubbles, simply tear off the polarizer and re-paste it;

[0033] (2) The display screen 21 is simply fixed on the foam layer 222 to obtain the display unit 20, wherein the display screen 21 can be simply pasted on the EVA foam layer 222 by a certain low-viscosity glue (not shown in the figure);

[0034] (3) If Figure 5 As shown, the lens portion 10 and the display portion 20 are pressed against each other and then fastened with a fastening component, so that the lens portion 10 and the display portion 20 do not need to be fully bonded, thereby avoiding the huge loss of the flexible display screen 21 caused by the full bonding process.

[0035] Embodiment 2

[0036] like Figure 6 , Figure 7 , Figure 8As shown, the protective lens display screen assembly 200 with a "surround screen" design includes a lens portion 10 and a display portion 20. The lens portion 10 includes a transparent glass lens body 11 (which may be organic glass) with a thickness of 0.2 mm (0.2 mm to 2.0 mm), and the inner side of the lens body 11 is a first supporting surface 12. The two wings of the lens body 11 are bent to the back and form a surface angle of 180° with the central area, so that the inner side surfaces at both sides of the lens body 11, that is, part of the first supporting surface 12, are first curved surfaces 121 that are bent inward, and the first curved surface 121 is a developable curved surface. A circular polarizer 13 is attached to the first supporting surface 12.

[0037] The display unit 20 includes an OLED (or LCD, QLED, micro LED) flexible display screen 21 and a back support 22. The back support 22 is a rigid aluminum plate 221 that is bent to the back in line with the lens body 11, and its outer side is a second support surface 23, which corresponds to the first support surface 12 (the two support surfaces are formed by evenly shrinking the first support surface 12 inward), and includes a second curved surface 231 corresponding to the first curved surface 121. The display screen 21 is adhered to the second support surface 23 by an adhesive layer.

[0038] The lens part 10 is sleeved on the outside of the display part 20 and fixed to each other through another fastening member (not shown in the figure). The main area (display area) is not bonded to the lens part 10 through the adhesive layer, and there is basically a gap 30 between the display screen 21 and the circular polarizer 13, that is, there is an air layer 30.

[0039] like Figure 4 As shown, when external light 40 is irradiated onto the protective lens display screen combination, the external light 40 becomes left-handed (or right-handed) circularly polarized light 41 after passing through the circular polarizer 13. After the circular polarized light 41 is reflected on the two interfaces of the air layer in the gap 30, it becomes right-handed (or left-handed) circularly polarized light 42, which will be absorbed when passing through the circular polarizer 13 again, thereby eliminating the reflected light of the air layer in the gap 30 and ensuring the low reflectivity of the protective lens display screen combination.

[0040] The manufacturing method of the protective lens display assembly 200 includes:

[0041] (1) Paste the circular polarizer 13 onto the concave first support surface 12 to obtain the lens portion 10. If there are defects such as bubbles, simply tear off the polarizer and re-paste it;

[0042] (2) The flexible display 21 is pasted to the second supporting surface 23 to obtain the display portion 20. Since the second supporting surface 23 is a convex surface, the operation is very simple and there is no need to worry about small bubbles between the display 21 and the supporting surface;

[0043] (3) If Fig. 9 As shown, the lens portion 10 is sleeved on the outside of the display portion 20, and there is no need to use full bonding between the lens portion 10 and the display portion 20, thereby avoiding the huge loss of the flexible display screen 21 caused by the full bonding process.

[0044] In addition, it should be noted that the names of the various parts of the specific embodiments described in this specification may be different, and any equivalent or simple changes made based on the structure, features and principles described in the patent concept of the present invention are included in the protection scope of the patent of the present invention. The technicians in the technical field of the present invention can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A protective lens display screen combination with a large curvature, characterized by: The lens comprises a lens part and a display part, wherein the lens part comprises a hard lens body, the inner side surface of the lens body is a first supporting surface, the first supporting surface comprises at least a first curved surface, and the first curved surface is a developable curved surface that curves inwards; The display portion includes a flexible display screen and a back support, wherein the back support is used to make the flexible display screen close to or in close proximity to the inner side of the first support surface to form a curved shape corresponding to the first support surface; The lens part covers or is sleeved on the outside of the display part, leaving a gap between it and the display part. The lens part also includes a circular polarizer, which is adhered to the first supporting surface and is used to eliminate the air interface reflected light in the gap.

2. The protective lens display assembly according to claim 1, characterized in that: The lens body is a transparent glass lens.

3. The protective lens display assembly according to claim 1, characterized in that: The first curved surface has at least one point that forms a surface angle greater than 85° with a main area of ​​the first supporting surface.

4. The protective lens display screen assembly as claimed in claim 3, characterized in that: The two sides of the first supporting surface form a surface angle of 85° to 90° with the central area.

5. The protective lens display screen assembly as claimed in claim 4, characterized in that: The two sides of the first supporting surface are wrapped around the back of the screen, and form a surface angle of 180° with the central area.

6. The protective lens display screen assembly as claimed in claim 1, characterized in that: The back support is an elastic component.

7. The protective lens display screen assembly as claimed in claim 6, characterized in that: The back support is elastic foam.

8. The protective lens display screen assembly according to claim 1, characterized in that: The back support is a fixing component capable of fixing the flexible display screen so as to bend according to the first supporting surface.

9. The protective lens display screen assembly as claimed in claim 8, characterized in that: The outer side surface of the back support is a second support surface, which is opposite to the first support surface and includes a second curved surface, which is another developable curved surface opposite to the first curved surface, and the flexible display screen is adhered to the second support surface to form a curve corresponding to the second support surface.

10. The protective lens display screen assembly according to claim 9, characterized in that: The second supporting surface is formed by uniformly shrinking the first supporting surface inward.

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