Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel comprises a substrate; the light-emitting layer is located on one side of the substrate and comprises a light-emitting unit; the diffusion part is arranged on the side, away from the substrate, of the light-emitting layer, located in the light emitting direction of the light-emitting unit and capable of diffusing external light; the light absorption part is located between the substrate and the first lens, the orthographic projection of the light absorption part on the substrate and the orthographic projection of the light emitting unit on the substrate are at least partially not overlapped, and the light absorption part is used for absorbing the external light refracted by the diverging part. By means of the design, the blackness of the display panel in the screen-off process can be 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. Background Art

[0002] Organic Light-Emitting Diode (OLED) is a new generation of light-emitting display technology with the advantages of wide viewing angle, high contrast, fast response speed, low power consumption, and flexible display. It has been widely used in products such as mobile phones and wearable devices and has good application prospects.

[0003] However, current display panels still have a high reflectivity to external light, resulting in insufficient blackness when the display panel is turned off. Summary of the invention

[0004] The present application provides a display panel and a display device, which can improve the blackness of the display panel when the screen is turned off.

[0005] The present application provides a display panel, which includes: a substrate; a light-emitting layer located on one side of the substrate, the light-emitting layer including a light-emitting unit; a diverging portion arranged on a side of the light-emitting layer away from the substrate, the diverging portion located in the light emitting direction of the light-emitting unit, and capable of diverging external light; a light absorbing member located between the substrate and the diverging portion, and an orthographic projection of the light-absorbing member on the substrate and an orthographic projection of the light-emitting unit on the substrate at least partially do not overlap, wherein the light absorbing member is used to absorb external light refracted by the diverging portion.

[0006] In one embodiment, the display panel further includes: a converging portion located between the light emitting layer and the diverging portion, the converging portion being located in the light emitting direction of the light emitting unit, and converging the light emitted by the light emitting unit.

[0007] In one embodiment, the diverging portion includes a lens, and the converging portion includes a lens.

[0008] In one embodiment, the optical axis of the diverging portion coincides with the optical axis of the converging portion.

[0009] Preferably, the orthographic projection of the diverging portion on the substrate covers the orthographic projection of the converging portion on the substrate.

[0010] Preferably, the orthographic projection of the diverging portion on the substrate extends beyond the orthographic projection of the converging portion on the substrate.

[0011] Preferably, the orthographic projection of the converging portion on the substrate covers the orthographic projection of the light emitting unit on the substrate.

[0012] In one embodiment, the light absorbing member and the converging portion are arranged in the same layer.

[0013] Preferably, the light absorbing element is a black matrix.

[0014] In one embodiment, the display panel further includes: a first flat layer, which is arranged on the side of the light-emitting layer away from the substrate, a first groove is provided on the surface of the first flat layer facing away from the substrate, and a second groove is provided on the surface facing the substrate, the diverging portion is arranged in the first groove, and the converging portion is arranged in the second groove.

[0015] Preferably, the diverging portion and the converging portion are both convex lenses, the refractive index of the converging portion is greater than the refractive index of the first flat layer, and the refractive index of the first flat layer is greater than the refractive index of the diverging portion.

[0016] In one embodiment, the display panel further comprises: a filter layer located on a side of the diverging portion away from the substrate, the filter layer comprising a filter block arranged in a light emitting direction of the light emitting unit.

[0017] Preferably, the orthographic projection of the diverging portion on the substrate covers the orthographic projection of the filter block on the substrate;

[0018] Preferably, the filter layer further comprises a light shielding block, and the number of the light filter blocks is plural, and a light shielding block is arranged between two adjacent light filter blocks.

[0019] Preferably, the light absorbing member and the light shielding block are made of the same material.

[0020] In one embodiment, the display panel further comprises: a second flat layer disposed between the filter layer and the diverging portion;

[0021] Preferably, the material of the second planar layer includes inorganic material or organic material.

[0022] In one embodiment, the display panel further includes: a pixel definition layer disposed between the radiating portion and the substrate, the pixel definition layer having a pixel opening, and at least a portion of the light emitting unit is disposed in the pixel opening.

[0023] Preferably, the material of the pixel definition layer is a light absorbing material, wherein the pixel definition layer between two adjacent pixel openings is reused as the light absorbing element.

[0024] In one embodiment, the display panel further comprises: an encapsulation layer disposed on a side of the light emitting layer away from the substrate, wherein the radiating portion is disposed on a side of the encapsulation layer away from the substrate.

[0025] Preferably, the light absorbing member is arranged on a side of the packaging layer away from the substrate.

[0026] The present application also provides a display device, comprising a display panel as described in any of the above embodiments.

[0027] Different from the prior art, the beneficial effect of the present application is as follows: by setting a divergent portion in the light emitting direction of the light emitting unit, the external light passes through the divergent portion, and the light at a large angle will be refracted into the light absorbing component, and the light absorbing component absorbs the light incident on its surface, thereby reducing the problem of excessive reflected light caused by the incident external light, thereby achieving a higher blackness when the display panel is turned off. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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 are 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, among which:

[0029] Figure 1 is a schematic structural diagram of an embodiment of a display panel of the present application;

[0030] Figure 2 is a schematic structural diagram of another embodiment of a display panel of the present application;

[0031] Figure 3 is a structural schematic diagram of another embodiment of the display panel of the present application;

[0032] Figure 4 It is a schematic structural diagram of an embodiment of the display device of the present application. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0034] It should be noted that the terms "first" and "second" in this application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0035] See also Figure 1 The present application provides a display panel 10, which includes a substrate 110, a light-emitting layer 120, a diverging portion 130 and a light-absorbing member 140. The light-emitting layer 120 is located on one side of the substrate 110, and the light-emitting layer 120 includes a light-emitting unit P; the diverging portion 130 is arranged on the side of the light-emitting layer 120 away from the substrate 110, and the diverging portion 130 is located in the light-emitting direction of the light-emitting unit P, and the diverging portion 130 can diverge external light; the light-absorbing member 140 is located between the substrate 110 and the diverging portion 130, and the orthographic projection of the light-absorbing member 140 on the substrate 110 does not overlap with the orthographic projection of the light-emitting unit P on the substrate 110 at least partially, wherein the light-absorbing member 140 is used to absorb the external light refracted by the diverging portion 130.

[0036] Specifically, the substrate 110 may be an array substrate; Figure 1 Two light-emitting units P are shown in the figure. The part corresponding to the light-emitting unit P on the left shows the external light entering the display panel 10, and the part corresponding to the light-emitting unit P on the right shows the light emitted by the light-emitting unit P. The direction of the light is the light-emitting direction. The divergent part 130 is arranged in the light-emitting direction of the light-emitting unit P, and the light-absorbing member 140 is arranged between the substrate 110 and the divergent part 130. The orthographic projection of the light-absorbing member 140 on the substrate 110 and the orthographic projection of the light-emitting unit P on the substrate 110 may not overlap partially or completely. Please refer to Figure 1In the portion corresponding to the light-emitting unit P on the left side, the divergent portion 130 can diverge the external light, and the external light at a large angle will be refracted onto the light-absorbing member 140. The light-absorbing member 140 can directly absorb the light diverged to its surface, and most of the external light is absorbed. Only a small part of the light at a small angle may enter the light-emitting layer 120 and be reflected by the electrode layer (not shown) corresponding to the light-emitting layer 120. Therefore, through the design of this application, most of the external light can be absorbed, thereby reducing the reflected light and ultimately improving the blackness of the display panel when the screen is turned off. Of course, when adjacent light-emitting units P are light-emitting units of different colors, the provision of the light-absorbing member 140 can further improve the problem of color crosstalk.

[0037] In one embodiment, see Figure 2 The display panel 10 further includes a converging portion 150 , which is located between the light emitting layer 120 and the diverging portion 130 and in the light emitting direction of the light emitting unit P, and is used to converge the light emitted by the light emitting unit P.

[0038] For details, see Figure 1 The converging portion 150, which corresponds to the part of the light emitting unit P on the middle right, can converge the light emitted by the light emitting unit P and play a converging role. This embodiment takes into account that the diverging portion 130 has a diverging effect on the light, and thus the light emitted by the light emitting unit P will also be diverged. The light emitted by the light emitting unit P is converged by the converging portion 150, and then diverged by the diverging portion 130, thereby ensuring that the light finally emitted will not diverge, and the light emitting area of ​​the emitted light can be controlled by the combination of the diverging portion 130 and the converging portion 150, and the light emitting area may not be equal to the area of ​​the light emitting unit P.

[0039] In one embodiment, see Figure 2 The diverging portion 130 includes a lens, and the converging portion 150 includes a lens. By providing a lens structure, the diverging effect of the diverging portion 130 on the external light and the converging effect of the converging portion 150 on the light emitted by the light emitting unit P can be improved.

[0040] In one embodiment, see Figure 2 , the optical axis of the diverging portion 130 coincides with the optical axis of the converging portion 150 .

[0041] Specifically, on the basis that the optical axis of the diverging portion 130 coincides with the optical axis of the converging portion 150 , both the external light and the light emitted by the light emitting unit P are symmetrical, so that the light path can be better controlled to achieve a better display effect.

[0042] Of course, in some other embodiments, the optical axis of the diverging portion 130 and the optical axis of the converging portion 150 may not coincide with each other.

[0043] In one embodiment, see Figure 2 , the orthographic projection of the diverging portion 130 on the substrate 110 covers the orthographic projection of the converging portion 150 on the substrate 110. In this way, it can be ensured that the light emitted by the light-emitting unit P can pass through the diverging portion 130 after being converged by the converging portion 150, thereby ensuring the light output efficiency.

[0044] In one embodiment, see Figure 2 , the orthographic projection of the divergent portion 130 on the substrate 110 extends beyond the orthographic projection of the converging portion 150 on the substrate 110. That is to say, on the basis that the orthographic projection of the divergent portion 130 on the substrate 110 completely covers the orthographic projection of the converging portion 150 on the substrate 110, the range of the orthographic projection of the divergent portion 130 on the substrate 110 is greater than the range of the orthographic projection of the converging portion 150 on the substrate 110, so that it can be ensured that the light of a large viewing angle emitted by the light-emitting unit P can also be emitted after passing through the converging portion 150 and the divergent portion 130.

[0045] In one embodiment, see Figure 2 , the orthographic projection of the converging portion 150 on the substrate 110 covers the orthographic projection of the light emitting unit P on the substrate 110. This ensures that the light emitted by the light emitting unit P can enter the converging portion 150 as much as possible, thereby ensuring the converging effect.

[0046] In one embodiment, see Figure 2 , the light absorbing member 140 is arranged in the same layer as the converging portion 150. The above two layers arranged in the same layer can ensure that the light that does not pass through the converging portion 150 is absorbed by the light absorbing member 140, and at the same time can reduce the thickness of the film layer.

[0047] In one embodiment, the light absorbing member 140 is a black matrix. The material of the black matrix includes carbon black, etc., which can fully absorb the light incident on the surface of the black matrix.

[0048] In one embodiment, see Figure 2 The display panel 10 further includes a first flat layer 160, which is arranged on the side of the light-emitting layer 120 away from the substrate 110. A first groove (not shown) is provided on the surface of the first flat layer 160 facing away from the substrate 110, and a second groove (not shown) is provided on the surface facing the substrate 110. The divergent portion 130 is arranged in the first groove, and the converging portion 150 is arranged in the second groove.

[0049] Specifically, since the structures of the divergent portion 130 and the convergent portion 150 are independent structures corresponding to the light-emitting unit P, the surface structure of the entire film layer formed is not flat. In the present embodiment, a first flat layer 160 is provided. The material of the first flat layer 160 includes an organic material, such as organic OC glue, etc. The first flat layer 160 is provided with a first groove and a second groove. The first groove can be used to accommodate the divergent portion 130, and the second groove can be used to accommodate the convergent portion 150, which is equivalent to embedding both the divergent portion 130 and the convergent portion 150 in the first flat layer 160, so that the entire film layer is flattened.

[0050] In one embodiment, see Figure 2 , the diverging portion 130 and the converging portion 150 are both convex lenses, the refractive index of the converging portion 150 is greater than the refractive index of the first flat layer 160, and the refractive index of the first flat layer 160 is greater than the refractive index of the diverging portion 130. That is to say, along the light emitting direction, the refractive indices of the converging portion 150, the first flat layer 160 and the diverging portion 130 decrease in sequence.

[0051] In some other embodiments, the diverging portion 130 and the converging portion 150 may both be concave lenses, the refractive index of the converging portion 150 is smaller than the refractive index of the first flat layer 160, and the refractive index of the first flat layer 160 is smaller than the refractive index of the diverging portion 130, so that the effect of the diverging portion 130 diverging light and the converging portion 150 converging light can be achieved.

[0052] In other embodiments, one of the diverging portion 130 and the converging portion 150 is a convex lens and the other is a concave lens. Combined with the relative size relationship of the refractive indices of adjacent film layers in the above two embodiments, the effect of the diverging portion 130 diverging light and the converging portion 150 converging light can also be achieved.

[0053] In some other embodiments, the diverging portion 130 includes a lens structure of a solid, liquid or gas structure, and the effect of diverging external light can be achieved by filling the first groove of the first flat layer 160 with solid material, liquid material or gas material as long as the above-mentioned refractive index requirements are met.

[0054] Of course, in some other implementations, the first planar layer may not be provided.

[0055] In one embodiment, see Figure 2 The display panel 10 further includes a filter layer 170 , which is located on a side of the diverging portion 130 away from the substrate 110 , and includes a filter block 171 arranged in the light emitting direction of the light emitting unit P.

[0056] Specifically, the filter block 171 is arranged in the light emitting direction of the light emitting unit P, and is used to absorb light with a color different from that of the light emitting unit P, and can transmit the light emitted by the light emitting unit P itself. Through the combination of the filter block 171, the divergent portion 130, and the light absorbing member 140, the incidence of external light of other colors can be avoided, thereby reducing the amount of incident light. The light is then absorbed by the light absorbing member 140, thereby further reducing the reflected light, which is beneficial to improving the blackness of the display panel 10.

[0057] In one embodiment, see Figure 2 , the orthographic projection of the diverging portion 130 on the substrate 110 covers the orthographic projection of the filter block 171 on the substrate 110. In this way, it can be ensured that all external light passing through the filter block 171 can be diverged after passing through the diverging portion 130.

[0058] In one embodiment, see Figure 2 The filter layer 170 further includes a light shielding block 172 . There are multiple light filter blocks 171 , and a light shielding block 172 is disposed between two adjacent light filter blocks 171 .

[0059] Specifically, the shading block 172 is different from the filter block 171 in that the shading block 172 can absorb all light. Since the shading block 172 is arranged between two adjacent filter blocks 171 and is not directly facing the light-emitting unit P, it does not affect the normal light emission of the light-emitting unit P. At the same time, the shading block 172 can further reduce the external light incident on the light-emitting layer 120.

[0060] In one embodiment, the light absorbing member 140 and the light shielding block 172 are made of the same material. Since the light absorbing member 140 and the light shielding block 172 have the same function, both the light absorbing member 140 and the light shielding block 172 can be made of black matrix material.

[0061] Of course, in some other implementations, the display panel may not be provided with a filter layer.

[0062] In one embodiment, the display panel 10 further includes a second planar layer 180 , which is disposed between the filter layer 170 and the radiating portion 130 .

[0063] Specifically, the second flat layer 180 is used to flatten the unevenness that may be caused by the divergent portion 130 , so that the flatness of the filter layer 170 can be ensured, thereby ensuring a better display effect.

[0064] In one embodiment, the material of the second planar layer 180 includes an inorganic material or an organic material, wherein the inorganic material includes at least one of silicon oxide, silicon nitride and silicon oxynitride, and the organic material includes photoresist, etc., which may also be the same as the material of the first planar layer 160 .

[0065] Of course, in some other implementations, the second planar layer may not be provided in the display panel.

[0066] In one embodiment, see Figure 3 The display panel 10 further includes a pixel definition layer 190, which is disposed between the diverging portion 130 and the substrate 110. The pixel definition layer 190 is provided with a pixel opening, and at least part of the light emitting unit P is disposed in the pixel opening. The pixel definition layer 190 is provided with a pixel opening to define the position of the light emitting unit P and to separate adjacent light emitting units P.

[0067] In one embodiment, see Figure 3 The material of the pixel definition layer 190 is a light absorbing material, wherein the pixel definition layer 190 between two adjacent pixel openings is reused as the light absorbing member 140. The light absorbing material includes a black material, and the pixel definition layer 190 can be a black pixel definition layer that can absorb the light refracted by the diverging portion 130 and Figure 2 The difference is that, in this embodiment, no additional film layer is required, and the same effect can be achieved by simply setting the material of the pixel definition layer 190 to a light absorbing material.

[0068] In one embodiment, see Figure 2 The display panel 10 further includes an encapsulation layer 210 , which is disposed on a side of the light emitting layer 120 away from the substrate 110 , wherein the radiating portion 130 is disposed on a side of the encapsulation layer 210 away from the substrate 110 .

[0069] Specifically, the encapsulation layer 210 is used to protect the light-emitting layer 120 to prevent the invasion of water vapor. Meanwhile, the diverging portion 130 is disposed on the side of the encapsulation layer 210 away from the substrate 110 , which can reduce the influence of the diverging portion 130 on the encapsulation effect of the encapsulation layer 210 .

[0070] In one embodiment, see Figure 2 , the light absorbing member 140 is disposed on the side of the encapsulation layer 210 away from the substrate 110. In this way, the influence of the light absorbing member 140 on the encapsulation layer 210 can be reduced.

[0071] Of course, in another embodiment, see Figure 3 The light absorbing member 140 is disposed between the encapsulation layer 210 and the substrate 110 .

[0072] See also Figure 4 The present application also provides a display device 20, which includes any display panel 10 as described above.

[0073] Specifically, the display device 20 can be any electronic device such as a notebook, a desktop computer, a tablet computer, a mobile phone, a smart watch, a virtual display terminal, etc., and is not limited here.

[0074] The present application further provides a method for preparing the display panel 10, which can be combined with reference to Figure 1 S01: providing a substrate 110; S02: forming a light-emitting layer 120 by a vapor deposition process to obtain a light-emitting unit P; S03: forming a light-absorbing member 140 by a photolithography process on a side of the light-emitting layer 120 away from the substrate 110; S04: preparing a diverging portion 130 on a side of the light-absorbing member 140 away from the substrate 110, wherein the diverging portion 130 is located in the light emitting direction of the light-emitting unit P, and the light-emitting unit P and the light-absorbing member 140 at least partially do not overlap.

[0075] In one embodiment, see Figure 2 After step S03 , a converging portion 150 is formed on a side of the light emitting layer 120 away from the substrate 110 , and a first flat layer 160 is further formed on a side of the converging portion 150 away from the substrate 110 .

[0076] In one embodiment, see Figure 2 After step S04, a filter layer 170 is prepared on the side of the diverging portion 130 away from the substrate 110, and a filter block 171 and a light shielding block 172 are prepared by a photolithography process.

[0077] In one embodiment, see Figure 2 Before preparing the above-mentioned filter layer 170 , it further includes preparing a second flat layer 180 on the side of the diverging portion 130 away from the substrate 110 .

[0078] In one embodiment, see Figure 2 After step S03 , an encapsulation layer 210 is formed on the side of the light emitting layer 120 away from the substrate 110 .

[0079] The above description is only an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A display panel, characterized in that: The display panel comprises: substrate; A light-emitting layer, located on one side of the substrate, the light-emitting layer includes a light-emitting unit; A diverging portion, arranged on a side of the light-emitting layer away from the substrate, the diverging portion is located in the light emitting direction of the light-emitting unit, and the diverging portion can diverge external light; The light absorbing member is located between the substrate and the diverging portion, and the orthographic projection of the light absorbing member on the substrate and the orthographic projection of the light emitting unit on the substrate at least partially do not overlap, wherein the light absorbing member is used to absorb external light refracted by the diverging portion.

2. The display panel according to claim 1, characterized in that: The display panel further comprises: The converging portion is located between the light emitting layer and the diverging portion. The converging portion is located in the light emitting direction of the light emitting unit. The converging portion can converge the light emitted by the light emitting unit.

3. The display panel according to claim 2, characterized in that: The diverging portion includes a lens, and the converging portion includes a lens; Preferably, the optical axis of the divergent portion coincides with the optical axis of the converging portion; Preferably, the orthographic projection of the diverging portion on the substrate covers the orthographic projection of the converging portion on the substrate; Preferably, the orthographic projection of the diverging portion on the substrate extends beyond the orthographic projection of the converging portion on the substrate; Preferably, the orthographic projection of the converging portion on the substrate covers the orthographic projection of the light emitting unit on the substrate.

4. The display panel according to claim 2, characterized in that: The light absorbing member is arranged on the same layer as the converging portion; Preferably, the light absorbing element is a black matrix.

5. The display panel according to claim 2, characterized in that: The display panel further comprises: The first flat layer is arranged on the side of the light-emitting layer away from the substrate. The first flat layer has a first groove on the surface facing away from the substrate and a second groove on the surface facing the substrate. The converging portion is arranged in the first groove, and the converging portion is arranged in the second groove; Preferably, the diverging portion and the converging portion are both convex lenses, the refractive index of the converging portion is greater than the refractive index of the first flat layer, and the refractive index of the first flat layer is greater than the refractive index of the diverging portion.

6. The display panel according to claim 1, characterized in that: The display panel further includes: A filter layer, located on a side of the diverging portion away from the substrate, the filter layer comprising a filter block arranged in a light emitting direction of the light emitting unit; Preferably, the orthographic projection of the diverging portion on the substrate covers the orthographic projection of the filter block on the substrate; Preferably, the filter layer further comprises a light shielding block, the number of the light shielding blocks is multiple, and the light shielding block is arranged between two adjacent light filter blocks; Preferably, the light absorbing member and the light shielding block are made of the same material.

7. The display panel according to claim 6, characterized in that: The display panel further comprises: A second flat layer is disposed between the filter layer and the diverging portion; Preferably, the material of the second planar layer includes inorganic material or organic material.

8. The display panel according to claim 1, characterized in that: The display panel further comprises: A pixel definition layer, disposed between the diverging portion and the substrate, the pixel definition layer being provided with a pixel opening, and at least a portion of the light emitting unit being disposed in the pixel opening; Preferably, the material of the pixel definition layer is a light absorbing material, wherein the pixel definition layer between two adjacent pixel openings is reused as the light absorbing element.

9. The display panel according to claim 1, characterized in that: The display panel further comprises: An encapsulation layer is arranged on a side of the light-emitting layer away from the substrate, wherein the diverging portion is arranged on a side of the encapsulation layer away from the substrate; Preferably, the light absorbing member is arranged on a side of the packaging layer away from the substrate.

10. A display device, characterized in that: The invention comprises a display panel as claimed in any one of claims 1 to 9.

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