OLED display device

Abstract

The utility model provides an OLED display device which comprises a glass cover plate, a bonding layer, a polaroid, a display panel and a back pasting film material from top to bottom, and the display panel comprises a substrate and a packaging panel. The OLED display device comprises a light-transmitting area and a non-light-transmitting area, the light-transmitting area is a blind hole area, the non-light-transmitting area comprises a wiring area and a display area, and the camera shooting device can shoot through the blind hole area. At least one anti-reflection film layer is arranged on the position, corresponding to the blind hole area, of the substrate, and the optical interference of the blind hole area is improved through the arrangement of the anti-reflection film layer.

Description

Technical Field

[0001] The utility model relates to the technical field of displays, and particularly to an OLED display device. Background Art

[0002] In a blind-hole OLED display screen, concentric rings, i.e., Newton's rings, are easily visible under strong light. The reason for the formation of Newton's rings is that there is no display material between the encapsulation cover plate and the array substrate in the blind-hole area, and generally an inert gas is filled. When there are inconsistent micro-deformations between the encapsulation cover plate and the array substrate in the blind-hole area, a wedge-shaped air film is generated between the two layers of the encapsulation cover plate and the array substrate. When light is incident, the reflected light generated on the surfaces of the encapsulation cover plate and the array substrate meets to form interference. The optical path difference δ of the two reflected lights is δ = 2d + 1 / 2λ, where d is the thickness of the air layer and λ is the wavelength of the incident light. When δ = k * λ, k = 0, 1, 2,... the interference fringes are bright fringes; when δ = (2k + 1) * λ / 2, k = 0, 1, 2,... the interference fringes are dark fringes, that is, bright and dark alternating fringes are formed. The visual effect of Newton's rings is not good, and it causes fluctuations in light transmittance. Summary of the Utility Model

[0003] Based on the problems existing in the prior art, the utility model provides an OLED display device, aiming to solve the technical problems such as the appearance of Newton's rings in the blind-hole area of the OLED display device in the prior art.

[0004] An OLED display device includes a glass cover plate, an adhesive layer, a polarizer, a display panel, and a back laminating film from top to bottom, wherein the display panel includes a substrate located below and an encapsulation panel located above;

[0005] The OLED display device includes a light-transmitting area and a non-light-transmitting area, the light-transmitting area is a blind-hole area, and the non-light-transmitting area includes a wiring area and a display area;

[0006] An anti-reflection layer is provided on the substrate of the display panel at a corresponding position in the blind-hole area.

[0007] Further, the anti-reflection layer is located on the upper surface of the substrate facing the encapsulation panel.

[0008] Further, the refractive index of the anti-reflection layer is less than the refractive index of the encapsulation panel.

[0009] Further, the upper surface of the anti-reflection layer is a planar structure, and the thickness of the anti-reflection layer satisfies the following formula:

[0010] e = (2k + 1) * λ / 4n1;

[0011] Wherein,

[0012] e is the thickness of the anti-reflection layer;

[0013] k is a positive integer;

[0014] λ is the wavelength of incident visible light, ranging from 400 to 800 nm;

[0015] n1 is the refractive index of the antireflection layer.

[0016] Furthermore, the antireflection layer is an inorganic material layer.

[0017] Furthermore, the antireflection layer is formed of silicon oxide.

[0018] Furthermore, the upper surface of the antireflection layer is a groove structure.

[0019] Furthermore, the groove structure of the antireflection layer is a concave curved surface structure.

[0020] Furthermore, the radius of curvature of the concave curved surface structure of the antireflection layer is close to the radius of curvature of the encapsulation panel in the blind hole area.

[0021] The beneficial technical effect of the present utility model is that: an OLED display device of the present utility model eliminates the fringe interference in the blind hole area and avoids the generation of Newton's rings under strong light by providing an antireflection layer covering the blind hole area on the substrate. Description of the Drawings

[0022] Figure 1 It is a structural diagram of a preferred embodiment of an OLED display device of the present utility model;

[0023] Figure 2 It is a structural diagram of another preferred embodiment of an OLED display device of the present utility model;

[0024] Figure 3 It is a structural diagram of another preferred embodiment of an OLED display device of the present utility model;

[0025] Wherein,

[0026] 1 - glass cover plate;

[0027] 2 - adhesive layer;

[0028] 3 - polarizer;

[0029] 4 - antireflection layer.

[0030] 5 - encapsulation panel;

[0031] 6 - display area;

[0032] 7 - substrate;

[0033] 8 - wiring area;

[0034] 9 - back film material;

[0035] 10 - Camera;

[0036] 11 - Blind hole area. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0038] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0039] Next, the present invention will be further described in conjunction with the accompanying drawings and specific embodiments, but it is not a limitation of the present invention.

[0040] See Figure 1 , the present invention provides an OLED display device, including a glass cover plate (1), an adhesive layer (2), a polarizer (3), a display panel, and a back film material (9) from top to bottom, wherein the display panel includes a substrate (7) located below and a packaging panel (5) located above;

[0041] The OLED display device includes a light-transmitting area and a non-light-transmitting area, the light-transmitting area is a blind hole area (11), and the non-light-transmitting area includes a wiring area (8) and a display area (6);

[0042] An anti-reflection layer (4) is provided on the substrate (7) of the display panel at a position corresponding to the blind hole area (11).

[0043] An OLED display device of the present invention eliminates the fringe interference in the blind hole area (11) and avoids the generation of Newton's rings under strong light by providing an anti-reflection layer (4) on the substrate (7) to cover the blind hole area (11).

[0044] Further, the substrate (7) is an array substrate. Further, the array substrate is an LTPS substrate (7), that is, a low-temperature polysilicon substrate.

[0045] Further, the adhesive layer (2) is an optically transparent adhesive.

[0046] Further, the polarizer (3) covers the display area (6) and the wiring area (8).

[0047] Further, a camera (10) is provided below the substrate (7), and the camera (10) corresponds to the blind hole area (11).

[0048] Further, the antireflection layer (4) is located on the upper surface of the substrate (7) facing the encapsulation panel (5).

[0049] Further, the refractive index of the antireflection layer (4) is less than the refractive index of the encapsulation panel (5).

[0050] Further, the upper surface of the antireflection layer (4) is a planar structure, and the thickness of the antireflection layer (4) satisfies the following formula:

[0051] e = (2k + 1)*λ / 4n1;

[0052] Wherein,

[0053] e is the thickness of the antireflection layer (4);

[0054] k is a positive integer;

[0055] λ is the wavelength of incident visible light, ranging from 400 to 800 nm;

[0056] n1 is the refractive index of the antireflection layer (4).

[0057] By appropriately designing the thickness, Newton's rings are eliminated.

[0058] As a preferred embodiment, λ is selected as the wavelength of 555 nm of yellow-green light sensitive to the human eye.

[0059] Further, the antireflection layer (4) is an inorganic material layer.

[0060] Further, the antireflection layer (4) is formed of silicon oxide, i.e., SiOx.

[0061] See Figure 3 , further, the upper surface of the antireflection layer (4) is a groove structure.

[0062] See Figure 2 , further, the groove structure of the antireflection layer (4) is a concave curved surface structure.

[0063] Further, the radius of curvature of the concave curved surface structure of the antireflection layer (4) is close to the radius of curvature of the encapsulation panel (5) in the blind hole area (11).

[0064] When there is an inconsistent micro-deformation between the encapsulation panel (5) and the substrate (7) in the blind hole area (11), a wedge-shaped air film is generated between the two layers of the encapsulation panel (5) and the substrate (7). When light is incident, the reflected lights generated on the surfaces of the encapsulation panel (5) and the substrate (7) meet to form interference. The optical path difference δ of the two reflected lights is δ = 2d + 1 / 2λ, where d is the thickness of the air thin layer and λ is the wavelength of the incident light. When δ = k*λ, k = 0, 1, 2, …, the interference fringes are bright fringes; when δ = (2k + 1)*λ / 2, k = 0, 1, 2, …, the interference fringes are dark fringes, that is, bright and dark alternating fringes are formed. The anti-reflection layer (4) is a material with a refractive index less than that of the encapsulation panel (5) and greater than that of air. When light waves are incident on the upper and lower surfaces of the anti-reflection layer (4), reflection will occur. If the thickness of the anti-reflection layer (4) satisfies the formula e = (2k + 1)*λ / 4n1, the optical path difference of the two reflected light waves is half a wavelength, and the two reflected light waves will cancel each other out, so that bright and dark alternating fringes will not appear, that is, Newton's rings are formed. Further, the formation of Newton's rings is mainly due to the appearance of the wedge-shaped air film, that is, the distances between the encapsulation panel (5) and the substrate (7) are inconsistent at various positions in the blind hole area (11). Generally, the micro-deformation is that the encapsulation panel (5) presents a concave shape. In this way, in the blind hole area (11), the wedge-shaped air film will be thicker at both sides than in the middle. Therefore, the anti-reflection layer (4) is set as a groove structure, and an air film formed by gas is between the anti-reflection layer (4) and the encapsulation panel (5). In this way, the thicknesses of both sides of the air film are close to that of the middle part. If the anti-reflection layer (4) satisfies the above formula, Newton's rings can also be eliminated. Further, because the encapsulation panel (5) generally has a micro-deformation of a concave curved surface, the upper surface of the anti-reflection layer (4) is also set as a concave curved surface structure, and the radius of curvature of the anti-reflection layer (4) is the same as that of the encapsulation panel (5). In this way, the thicknesses of the air films formed by the filling gas between the anti-reflection layer (4) and the encapsulation panel (5) are made as close as possible at various positions, so that Newton's rings are not easily generated.

[0065] Specifically, the following method is used to calculate the radius of curvature of the encapsulation panel (5) in the blind hole area (11).

[0066] The encapsulation panel (5) in the corresponding area is irradiated with monochromatic light with a wavelength of λ′, and the radius of curvature R is calculated by the following formula:

[0067]

[0068] Among them,

[0069] r k represents the radius of the k-th dark fringe;

[0070] r k+m represents the radius of the (k + m)-th dark fringe.

[0071] The above are only the preferred embodiments of the present utility model, and thus do not limit the implementation manners and protection scope of the present utility model. For those skilled in the art, it should be realized that all the solutions obtained by equivalent substitutions and obvious changes made by using the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An OLED display device, characterized in that, It includes a glass cover plate from top to bottom, an adhesive layer, a polarizer, a display panel, and a back film material, wherein the display panel includes a substrate located below and a packaging panel located above; The OLED display device includes a light-transmitting area and a light-blocking area. The light-transmitting area is a blind hole area, and the light-blocking area includes a wiring area and a display area; An anti-reflection layer is provided on the substrate of the display panel at a position corresponding to the blind hole area.

2. The OLED display device according to claim 1, wherein The anti-reflection layer is located on the upper surface of the substrate facing the packaging panel.

3. An OLED display device according to claim 1, wherein, The refractive index of the anti-reflection layer is less than the refractive index of the packaging panel.

4. An OLED display device according to claim 2, wherein, The upper surface of the anti-reflection layer is a planar structure, and the thickness of the anti-reflection layer satisfies the following formula: e = (2k + 1)*λ / 4n1; Wherein, e is the thickness of the anti-reflection layer; k is a positive integer; λ is the wavelength of incident visible light, ranging from 400 to 800 nm; n1 is the refractive index of the anti-reflection layer.

5. An OLED display device according to claim 1, characterized in that, The anti-reflection layer is an inorganic material layer.

6. An OLED display device according to claim 1, characterized in that, The anti-reflection layer is formed of silicon oxide.

7. The OLED display device according to claim 2, wherein The upper surface of the anti-reflection layer is a groove structure.

8. An OLED display device according to claim 7, characterized in that, The groove structure of the anti-reflection layer is a concave curved surface structure.

9. An OLED display device according to claim 8, characterized in that, The radius of curvature of the concave curved surface structure of the anti-reflection layer is close to the radius of curvature of the packaging panel in the blind hole area.

Images