Display panel and display device thereof

Abstract

The embodiment of the utility model discloses a display panel and a display device thereof, the display panel comprises an array substrate, a plurality of light-emitting units and a convex lens structure, the convex lens structure is arranged in the light-emitting direction of the light-emitting units, and the convex lens structure comprises a first part and a second part which are stacked, the protrusions of the first part and the second part face the direction away from the array substrate, and the ratio of the thickness of the convex lens structure to the distance between the adjacent light-emitting units ranges from 7.5 to 33. By arranging the convex lens structure with the first part and the second part, converged light formed after light passes through the first part is emitted after being condensed by the second part again, so that the luminous efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device thereof. Background Art

[0002] Conventionally, a lens is usually arranged in the light emitting direction of the light emitting unit to realize focusing. In order to realize a better focusing effect, the prism needs to have a specific thickness, which is difficult to realize in terms of technology, resulting in poor focusing effect in the conventional display panel.

[0003] Therefore, the existing display panel has a technical problem that the lens focusing effect in the light emitting direction of the light emitting unit is poor. Utility Model Content

[0004] The embodiments of the present application provide a display panel and a display device thereof, which can alleviate the technical problem of poor lens focusing effect in the light emitting direction of the light emitting unit in the existing display panel.

[0005] An embodiment of the present application provides a display panel, including:

[0006] An array substrate;

[0007] A plurality of light emitting units are arranged at intervals on the array substrate;

[0008] A plurality of convex lens structures, each of which is arranged in the light emitting direction of the corresponding light emitting unit, each of which comprises a first portion and a second portion which are stacked, the second portion being arranged on a side of the first portion away from the array substrate, and protrusions of the first portion and the second portion facing a direction away from the array substrate;

[0009] Wherein, the ratio of the thickness of the convex lens structure to the spacing between adjacent light-emitting units ranges from 7.5 to 33.

[0010] Optionally, in some embodiments of the present application, the orthographic projection of the second portion on the array substrate falls within the orthographic projection range of the first portion on the array substrate, and the curvature radius of the second portion is smaller than the curvature radius of the first portion.

[0011] Optionally, in some embodiments of the present application, the spacing distance between adjacent light-emitting units is less than or equal to 0.8 microns, and the thickness of the convex lens structure is greater than or equal to 6 microns.

[0012] Optionally, in some embodiments of the present application, the refractive index of the first portion is the same as or similar to that of the second portion.

[0013] Optionally, in some embodiments of the present application, the first part of the convex lens structure and the second part are made of the same material, and the first part and the second part are an integral structure.

[0014] Optionally, in some embodiments of the present application, the orthographic projection of the first part on the array substrate completely covers the orthographic projection of the corresponding light-emitting unit on the array substrate.

[0015] Optionally, in some embodiments of the present application, the display panel further includes a first electrode layer and a second electrode layer, the first electrode layer is arranged above the array substrate, the light-emitting unit is arranged on a side of the first electrode layer away from the array substrate, and the second electrode layer is arranged on a side of the light-emitting unit away from the array substrate, a gap is formed between adjacent light-emitting units, a connecting portion is arranged in the gap, the connecting portion is made of the same material as the convex lens structure, and the connecting portion is connected to adjacent convex lens structures to form a grid structure.

[0016] Optionally, in some embodiments of the present application, a central axis of the second part coincides with a central axis of the light-emitting unit.

[0017] Optionally, in some embodiments of the present application, in a film thickness direction, the thickness of the second portion is greater than the thickness of the first portion.

[0018] An embodiment of the present application provides a display device, comprising a display panel as described in any of the above embodiments.

[0019] Beneficial effect: By arranging a convex lens structure in the light emitting direction of the light emitting unit, the convex lens structure includes a first part and a second part which are stacked, the second part is located above the first part and its orthographic projection falls within the first part, and the ratio of the thickness of the convex lens structure to the spacing between adjacent light emitting units ranges from 7.5 to 33, so that the converged light formed after the light passes through the first part is emitted after being focused again by the second part, thereby improving the luminous efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 is a cross-sectional schematic diagram of a display panel provided by the present application;

[0022] FIG. 2A to FIG. 2IIt is a flow chart of the display panel preparation method provided in this application.

[0023] Description of reference numerals:

[0024] DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. The technical solutions described below are only used to explain and illustrate the ideas of the present application and should not be regarded as limiting the scope of protection of the present application.

[0026] In addition, the terms "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different technical features. The term "plurality" and similar words mean two or more, unless otherwise clearly defined.

[0027] See also Figure 1 The display panel 1 provided in the present application includes an array substrate 10, a plurality of light-emitting units 50, and a convex lens structure 80, wherein the light-emitting unit 50 is arranged on the array substrate 10, and the convex lens structure 80 is arranged in the light emitting direction of the light-emitting unit 50, and the convex lens structure 80 includes a first part 801 and a second part 802 which are stacked, and the second part 802 is arranged on a side of the first part 801 away from the array substrate 10, and the protrusions of the first part 801 and the second part 802 are oriented in a direction away from the array substrate 10; wherein the ratio of the thickness of the convex lens structure to the spacing between adjacent light-emitting units ranges from 7.5 to 33.

[0028] Among them, see Figure 1 The spacing d between adjacent light-emitting units is the vertical distance between the edges of the top light-emitting surfaces of adjacent light-emitting units. The ratio of the thickness of the convex lens structure to the spacing between adjacent light-emitting units ranges from 7.5 to 33. By increasing the ratio of the above thickness to the spacing, the spacing between adjacent light-emitting units is reduced to improve the resolution of the display panel.

[0029] The ratio of the thickness of the convex lens structure to the spacing between adjacent light-emitting units may be any value among 7.5, 10, 15, 20, 25, 30, and 33.

[0030] It can be understood that, for convex lens structures of the same thickness, the greater the ratio of the thickness of the convex lens structure to the spacing between adjacent light emitting units, the smaller the spacing between adjacent light emitting units, so as to improve the resolution of the display panel.

[0031] In this embodiment, a convex lens structure 80 is arranged in the light emitting direction of the light emitting unit 50, and the convex lens structure 80 includes a first part 801 and a second part 802 which are stacked. The converged light formed after the light passes through the first part 801 is again focused by the second part 802 and then emitted, thereby improving the focusing effect. In addition, the present novel embodiment sets the ratio of the thickness of the convex lens structure to the spacing between adjacent light emitting units in the range of 7.5 to 33, so that the spacing between two adjacent light emitting units can be smaller, thereby improving the resolution of the display panel.

[0032] The technical solution of the present application is now described in conjunction with specific embodiments.

[0033] The embodiment of the present application only takes the convex lens structure 80 including two stacked parts as an example for explanation, and the stacked design with three layers or more should also fall within the protection scope of the present application.

[0034] In addition, the spacing distance, preparation materials, height range, longitudinal cross-sectional shape, etc. of the present application are only described as the best or preferred implementation method. Other methods that can meet the focusing effect of the convex lens structure 80 should also belong to the protection scope of the present utility model and will not be repeated here.

[0035] In one embodiment, the orthographic projection of the second portion 802 on the array substrate 10 falls within the orthographic projection range of the first portion 801 on the array substrate 10 , and the curvature radius of the second portion 802 is smaller than the curvature radius of the first portion 801 .

[0036] It can be understood that, the smaller the radius of curvature of the second portion is, the greater the curvature of the light emitting surface of the second portion is, and the better the light converging effect is.

[0037] In one embodiment, the spacing distance between adjacent light emitting units is less than or equal to 0.8 micrometers, and the thickness of the convex lens structure is greater than or equal to 6 micrometers.

[0038] Furthermore, the thickness of the first portion 801 and the second portion 802 are both less than or equal to 5 micrometers.

[0039] It is understandable that since the aspect ratio of the photoresist in the existing photolithography process is usually about 6:1, forming a 10-micron convex lens structure 80 in one process will make the spacing between two pixel units about 2 microns. Therefore, two processes can be used to form the first part 801 and the second part 802 with a thickness less than or equal to 5 microns respectively, so that the spacing distance between adjacent light-emitting units is less than or equal to 0.8 microns.

[0040] In this embodiment, by providing a convex lens structure 80 including a first portion 801 and a second portion 802 stacked together, the interval between pixel units can be made less than or equal to 0.8 micrometers, thereby increasing pixel density and enhancing brightness effects.

[0041] In one embodiment, when the width of the pixel unit is about 10 um and the thickness of the convex lens structure 80 is about 10 um, the light focusing effect is optimal.

[0042] In one embodiment, the refractive index of the first portion 801 and the second portion 802 are the same or similar.

[0043] The refractive index approximation means that the absolute value of the refractive index difference between the first part 801 and the second part 802 is less than or equal to 0.1.

[0044] The first part 801 and the second part 802 are made of materials including silicon oxide.

[0045] In one embodiment, the first part 801 and the second part 802 of the convex lens structure are made of the same material, and the first part 801 and the second part 802 are an integral structure.

[0046] It can be understood that, if the first part 801 and the second part 802 are made of the same material, total reflection is not likely to occur at the interface between the first part 801 and the second part 802 , and the effect on light emission is small.

[0047] In this embodiment, by making the first part 801 and the second part 802 made of the same material, the influence of total reflection on light emission can be reduced, thereby improving the light emission effect.

[0048] In one embodiment, the orthographic projection of the first portion 801 on the array substrate 10 completely covers the orthographic projection of the corresponding light emitting unit 50 on the array substrate 10 .

[0049] In the film thickness direction, the edge of the first portion 801 is disposed beyond the edge of the light emitting unit 50 .

[0050] The edge of the second part 802 is located inside the edge of the first part 801 .

[0051] The area of ​​the first portion 801 in the film thickness direction is larger than the area of ​​the light emitting unit 50 .

[0052] It can be understood that the area of ​​the first portion 801 is larger than the light emitting unit 50, and the first portion 801 covers the light emitting unit 50 in the film thickness direction, so that the first portion 801 can better receive light.

[0053] In one embodiment, the height range of the first portion 801 is less than or equal to 5 micrometers, and the height range of the second portion 802 is less than or equal to 5 micrometers.

[0054] The thickness of the first portion 801 may be 1 micron, 2 microns, 3 microns, 4 microns, or 5 microns.

[0055] The thickness of the second portion 802 may be 1 micron, 2 microns, 3 microns, 4 microns, or 5 microns.

[0056] In one embodiment, the display panel also includes a first electrode layer 40 and a second electrode layer 70, the first electrode layer 40 is arranged above the array substrate 10, the light-emitting unit 50 is arranged on the side of the first electrode layer 40 away from the array substrate 10, and the second electrode layer 70 is arranged on the side of the light-emitting unit 50 away from the array substrate 10, a gap is formed between adjacent light-emitting units 50, a connecting portion is arranged in the gap, the connecting portion is made of the same material as the convex lens structure 80, and the connecting portion is connected to the adjacent convex lens structure 80 to form a grid structure.

[0057] The connecting portion may be prepared in the same layer as the first portion 801 and / or the second portion 802 .

[0058] It can be understood that adjacent convex lens structures 80 are connected by connecting parts to form an integral structure, and the integral structure is a grid-like structure, which can reduce the overall buffer stress.

[0059] In one embodiment, a central axis of the second portion 802 coincides with a central axis of the light emitting unit 50 .

[0060] The convex lens structures 80 are arranged in a one-to-one correspondence with the light-emitting units 50 .

[0061] In one embodiment, one of the convex lens structures 80 is disposed in alignment with at least two of the light emitting units 50 .

[0062] The first part 801 and the second part 802 of the convex lens structure 80 may both be cylindrical, and the side surface of the cylindrical shape is a light-collecting surface, and the light-collecting surface is located in the light-emitting direction and is used to collect light.

[0063] It is understandable that the alignment of one convex lens structure 80 and at least two light-emitting units 50 can reduce the number of convex lens structures 80 , thereby reducing the cost.

[0064] In one embodiment, the convex lens structure 80 may also be hemispherical.

[0065] Wherein, the convex lens structure 80 is disposed in alignment with the light emitting unit 50 .

[0066] In one embodiment, in the film thickness direction, the thickness of the second portion 802 is greater than the thickness of the first portion 801 .

[0067] The second portion 802 has a "bullet"-shaped profile, the thickness of the second portion 802 along the film thickness direction is greater than that of the first portion 801 , and the width of the second portion 802 along any horizontal direction is smaller than that of the first portion 801 in the same horizontal direction.

[0068] In one embodiment, an insulating layer 20, a bonding metal layer 30, and a first electrode layer 40 are further provided on the side of the array substrate 10 facing the light-emitting unit 50, and the light-emitting unit 50 is arranged on the first electrode layer 40. A dielectric layer 60 is further provided on the side of the light-emitting unit 50 away from the array substrate 10, and the dielectric layer 60 covers the side wall of the light-emitting unit 50.

[0069] The light emitting unit 50 is electrically connected to the first electrode layer 40 .

[0070] The dielectric layer 60 includes a first protective layer 601 and a second protective layer 602 which are stacked, and the dielectric layer 60 includes a penetrating via hole, which is aligned with the light-emitting unit 50 .

[0071] A second electrode layer 70 is further disposed on a side of the light emitting unit 50 away from the array substrate 10 , and the second electrode layer 70 is electrically connected to the light emitting unit 50 through the via hole.

[0072] The bonding metal layer 30 includes a first bonding layer 301 and a second bonding layer 302 which are stacked.

[0073] The insulating layer 20 is further penetrated by a through hole 90 , and the first electrode layer 40 is electrically connected to the array substrate 10 through the through hole 90 .

[0074] It can be understood that the first bonding layer 301 is arranged on the surface of one side of the insulating layer 20, and the second bonding layer 302 is arranged on the surface of one side of the first electrode layer 40, and the first bonding layer 301 and the second bonding layer 302 are connected to form the bonding metal layer 30.

[0075] In one embodiment, the convex lens structure 80 also includes a third part, which is arranged on a side surface of the second part 802 away from the first part 801, and the third part is arranged in a convex manner, and the convex direction of the third part is the same as the convex direction of the first part 801 and the second part 802.

[0076] Wherein, the longitudinal section of the third part is in the shape of an arc surface.

[0077] The curvature of the arc surface of the third portion is greater than the curvature of the arc surface of the second portion 802 .

[0078] See also FIG. 2A to FIG. 2I The present application also provides a method for preparing a display panel, comprising:

[0079] Step 1: Please refer to Figure 2A After bonding the array substrate 10 and the light-emitting unit 50 through the bonding metal layer 30, an integral structure is formed. The integral structure also includes a first electrode layer 40 and a second electrode layer 70 located on both sides of the light-emitting unit along the film thickness direction. A first silicon oxide material layer 100 is prepared by chemical vapor deposition on the surface of the second electrode layer 70. The surface of the first silicon oxide material layer 100 is concave to form a groove;

[0080] Step 2: Please refer to Figure 2B , Figure 2C , using semiconductor coating equipment to coat a photoresist material 120 with a high aspect ratio, and removing the photoresist material 120 in the groove through exposure and development technology;

[0081] Step 3: Please refer to Figure 2D , using an etching device to etch away the first silicon oxide material layer 100 at the groove, so that adjacent light emitting units 50 are separated and do not interfere with each other;

[0082] Step 4: Please refer to Figure 2E After the etching is completed, a second silicon oxide material layer 110 is deposited by chemical vapor deposition. The second silicon oxide material layer 110 has the same process as the first silicon oxide material layer 100, and the film properties and refractive index are consistent. At this time, the thickness of the silicon oxide layer directly above the light-emitting unit is the sum of the thickness of the first silicon oxide material layer 100 and the second silicon oxide material layer 110;

[0083] Step 5: Please refer to Figure 2F, obtaining the etching rate ratio of the silicon oxide material to the photoresist material 120 by calculation, coating the photoresist material with a corresponding thickness again, and exposing and developing the photoresist material;

[0084] Step 6: Please refer to Figure 2G , etching the second silicon oxide layer deposited for the second time using an etching device;

[0085] Step 7: Please refer to Figure 2H On the basis of the sixth step, according to the etching rates of the silicon oxide material and the photoresist material 120, the entire surface is coated with a corresponding thickness of the photoresist material 120 again;

[0086] Step 8: Please refer to Fig.2I The photoresist material is exposed and developed again and then heated and baked, so that the photoresist material 120 has a spherical appearance. According to the SIO and photoresist etching rate, the second silicon oxide material layer 110 is also spherical in appearance, thereby improving the focusing effect.

[0087] The thickness of the first silicon oxide material layer 100 and the second silicon oxide material layer 110 may both be 5 micrometers.

[0088] The utility model discloses a display panel, wherein a convex lens structure with a focusing effect is arranged in the light emitting direction of a light emitting unit, and the convex lens structure includes a first part and a second part which are stacked, the second part is located on a side of the first part away from a light source, and in the film thickness direction, the second part falls within the first part, and since the ratio of the thickness of the convex lens structure to the spacing between adjacent light emitting units ranges from 7.5 to 33, after the light is converged by the first part, it is once again focused by the convex surface of the second part with a greater degree of curvature, thereby improving the light emitting efficiency; at the same time, since the convex lens structure includes the first part and the second part and can be prepared in two steps, for photolithography materials with the same aspect ratio, the spacing between the prepared light emitting units is smaller, and therefore, the spacing between adjacent light emitting units can also be reduced.

[0089] The present application also proposes a display module and a display device, both of which include the above-mentioned display panel, and the display device includes but is not limited to a mobile phone, a laptop computer, and a tablet computer.

[0090] The display panel provided by the embodiment of the present application includes an array substrate, a plurality of light-emitting units, and a convex lens structure, wherein the light-emitting units are arranged on the array substrate, the convex lens structure is arranged in the light-emitting direction of the light-emitting units, the convex lens structure includes a first part and a second part which are stacked, the second part is arranged on a side of the first part away from the array substrate, the protrusions of the first part and the second part are oriented in a direction away from the array substrate, and the ratio of the thickness of the convex lens structure to the spacing between adjacent light-emitting units ranges from 7.5 to 33; by arranging the convex lens structure in the light-emitting direction of the light-emitting units, the convex lens structure includes a first part and a second part which are stacked, the second part is located above the first part and its orthographic projection falls within the first part, the converged light formed after the light passes through the first part is emitted after being focused again by the second part, thereby improving the luminous efficiency.

[0091] The display panel provided by the embodiment of the present application is described in detail above. Without departing from the spirit and essential points of the present application, those skilled in the art may make various corresponding changes and deformations according to the present application, but these corresponding changes and deformations shall all fall within the protection scope of the claims attached to the present application.

Claims

1. A display panel, characterized in that: include: An array substrate; A plurality of light emitting units are arranged at intervals on the array substrate; A plurality of convex lens structures, each of which is arranged in the light emitting direction of the corresponding light emitting unit, each of which comprises a first portion and a second portion which are stacked, the second portion being arranged on a side of the first portion away from the array substrate, and protrusions of the first portion and the second portion facing a direction away from the array substrate; Wherein, the ratio of the thickness of the convex lens structure to the spacing between adjacent light-emitting units ranges from 7.5 to 33.

2. The display panel according to claim 1, wherein: The orthographic projection of the second portion on the array substrate falls within the orthographic projection range of the first portion on the array substrate, and the curvature radius of the second portion is smaller than the curvature radius of the first portion.

3. The display panel according to claim 1, wherein: The spacing distance between adjacent light-emitting units is less than or equal to 0.8 micrometers, and the thickness of the convex lens structure is greater than or equal to 6 micrometers.

4. The display panel according to claim 1, wherein: The refractive index of the first portion is the same as or similar to that of the second portion.

5. The display panel according to claim 4, wherein: The first part of the convex lens structure and the second part are made of the same material, and the first part and the second part are an integral structure.

6. The display panel according to claim 1, wherein: The orthographic projection of the first part on the array substrate completely covers the orthographic projection of the corresponding light emitting unit on the array substrate.

7. The display panel according to claim 1, wherein: The display panel also includes a first electrode layer and a second electrode layer, the first electrode layer is arranged above the array substrate, the light-emitting unit is arranged on a side of the first electrode layer away from the array substrate, and the second electrode layer is arranged on a side of the light-emitting unit away from the array substrate, a gap is formed between adjacent light-emitting units, a connecting portion is arranged in the gap, the connecting portion is made of the same material as the convex lens structure, and the connecting portion is connected to adjacent convex lens structures to form a grid structure.

8. The display panel according to claim 7, wherein: The central axis of the second portion coincides with the central axis of the light emitting unit.

9. The display panel according to claim 7, wherein: In a film thickness direction, the thickness of the second portion is greater than the thickness of the first portion.

10. A display device, characterized in that: Comprising the display panel as claimed in any one of claims 1 to 9.

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