Display panel and display device

Abstract

Embodiments of the present application provide a display panel and a display device, comprising: a stacked light-emitting layer, a first light-taking layer, a flat layer and a second light-taking layer; the light-emitting layer comprises a plurality of first pixels for emitting first color light and second pixels for emitting second color light; the second light-taking layer comprises a second layer of first light-taking units corresponding to the first pixels one by one; the first light-taking layer is used for refracting the first color light and the second color light; the refractive index of the flat layer is less than the refractive index of the second layer of first light-taking units; the second layer of first light-taking units is used for refracting at least part of the first color light passing through the flat layer, so that the first color light and the second color light emitted by the second light-taking layer have consistent intensity. Embodiments of the present application set the second layer of first light-taking units corresponding to the first pixels to take out the first color light emitted by the first pixels, so that the taking-out rate of the first color light is consistent with the taking-out rate of the second color light.

Description

Technical Field

[0001] This application relates to the field of display technology, and more specifically, to a display panel and a display device. Background Technology

[0002] Organic light-emitting diodes (OLEDs) have many advantages over liquid crystal displays (LCDs), such as thinner profiles, lighter weight, better shock resistance, simpler manufacturing processes, and lower cost. However, OLEDs also have some drawbacks. One inherent drawback is that as light emitted from the emissive layer passes through the various film layers and is emitted to the outside, most of the light is lost through reflection, resulting in only about 20% of the light emitted from the emissive layer reaching the outside of the OLED display device.

[0003] Related technologies employ high-refractive-index microlens arrays (MLAs) to reduce total internal reflection of light within OLEDs, thereby increasing light extraction efficiency. However, existing materials used to fabricate microlenses (organic materials such as acrylics, benzocyclobutene, polyimide, and fluoropolymers) absorb certain colors of light (e.g., blue), resulting in a lower extraction rate for this color (the ratio of the intensity of a certain color of light emitted through the microlens to the intensity of light emitted by the emissive layer). This leads to an imbalance in the extraction rates of different colors of light emitted by the emissive layer, consequently causing an imbalance in the white light spots on the display panel. Summary of the Invention

[0004] This application addresses the shortcomings of existing methods by proposing a display panel and display device to solve the technical problem of unbalanced extraction rates of different colors of light emitted by the light-emitting layer in the prior art.

[0005] In a first aspect, embodiments of this application provide a display panel, comprising: a stacked light-emitting layer, a first light-collecting layer, a planarization layer, and a second light-collecting layer;

[0006] The light-emitting layer includes a plurality of first pixels for emitting a first color light and a second pixel for emitting a second color light; the second light-harvesting layer includes a second layer of first light-harvesting units corresponding one-to-one with the first pixels;

[0007] The first light-collecting layer is used to refract the first color light and the second color light;

[0008] The refractive index of the planarization layer is less than the refractive index of the first light-collecting unit in the second layer;

[0009] The second light-collecting unit is used to refract at least a portion of the first color light passing through the planarization layer, so that the intensity of the first color light and the second color light emitted from the second light-collecting layer are the same.

[0010] Optionally, the second light-collecting layer further includes a second light-collecting unit corresponding to each second pixel;

[0011] The refractive index of the second light-collecting unit in the second layer is less than the refractive index of the first light-collecting unit in the second layer and greater than the refractive index of the planarization layer.

[0012] The second light-collecting unit in the second layer is used to refract at least a portion of the second color light that has passed through the planarization layer, so that the intensity of the first color light and the second color light emitted from the second light-collecting layer are the same.

[0013] Optionally, the first light-harvesting layer includes: a first light-harvesting unit located between the first pixel and the second layer first light-harvesting unit, and a first layer second light-harvesting unit located between the second pixel and the second layer second light-harvesting unit;

[0014] The refractive index of the first light-collecting unit in the first layer is greater than the refractive index of the second light-collecting unit in the first layer.

[0015] Optionally, the first light-collecting unit of the first layer includes multiple first microlenses arranged in an array.

[0016] Optionally, the first layer of the second light-collecting unit includes multiple arrayed first microlenses;

[0017] The distance between any two adjacent first microlenses in the first light-collecting unit of the first layer is less than the distance between any two adjacent first microlenses in the second light-collecting unit of the first layer.

[0018] Optionally, the first layer of the second light-collecting unit includes multiple arrayed second microlenses;

[0019] The distance between any two adjacent first microlenses in the first light-collecting unit of the first layer is the same as the distance between any two adjacent second microlenses in the second light-collecting unit of the first layer.

[0020] The refractive index of the first microlens is greater than that of the second microlens.

[0021] Optionally, the first layer of the second light-collecting unit includes multiple arrayed first microlenses and second microlenses;

[0022] Within the second light-collecting unit of the first layer, the first microlens and the second microlens are arranged in alternating rows and / or columns.

[0023] Optionally, the first microlens is hemispherical and the second microlens is rectangular.

[0024] Optionally, both the first microlens and the second microlens are plano-convex lenses;

[0025] The planar radius of the first microlens is the same as that of the second microlens, and the spherical radius of the first microlens is smaller than that of the second microlens.

[0026] Optionally, the display panel may also include:

[0027] The first encapsulation layer is located between the light-emitting layer and the first light-collecting layer. The refractive index of the first encapsulation layer is less than the refractive index of the first light-collecting unit in the first light-collecting layer.

[0028] In a second aspect, this application provides a display device, including any of the display panels provided in the first aspect above.

[0029] The beneficial technical effects of the technical solution provided in this application include: a first light-collecting layer and a second light-collecting layer are provided on one side of the light-emitting layer of the display panel. The first light-collecting layer can extract (refract) the light of each color emitted by the light-emitting layer for the first time. The light emitted from the first light-collecting layer will undergo a certain degree of refraction or total internal reflection after passing through the planarization layer. In this application, a second layer of first light-collecting unit corresponding to the first pixel is provided on the side of the planarization layer away from the first light-collecting layer. The refractive index of the planarization layer is less than that of the second layer of first light-collecting unit. The light can be directed from the planarization layer with a lower refractive index to the second layer of first light-collecting unit with a higher refractive index, so that at least part of the first color light that may undergo total internal reflection in the planarization layer is refracted and emitted in the second layer of first light-collecting unit, thereby extracting at least part of the first color light in the planarization layer. This makes the extraction rate of the first color light emitted from the second light-collecting layer consistent with the extraction rate of the second color light, and the intensity of the first color light emitted from the second light-collecting layer consistent with the intensity of the second color light. This enables the white light containing the first color light and the second color light to reach a balanced state, thereby improving the display effect of the display panel.

[0030] Additional aspects and advantages of this application will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of this application. Attached Figure Description

[0031] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0032] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application;

[0033] Figure 2 This is a schematic diagram of another display panel structure provided in an embodiment of this application;

[0034] Figure 3This is a schematic diagram of the structure of another display panel provided in an embodiment of this application;

[0035] Figure 4 A top view schematic diagram of the structure of the second light-collecting unit in the first layer of another display panel provided in an embodiment of this application;

[0036] Figure 5 This is a schematic diagram of another display panel provided in an embodiment of this application;

[0037] Figure 6 A schematic diagram of the structure of another display panel provided in this application embodiment;

[0038] Figure 7 This is a top view schematic diagram of the structure of the second light-collecting unit in the first layer of a display panel provided in an embodiment of this application.

[0039] Figure label:

[0040] 100 - Display panel;

[0041] 10-Substrate;

[0042] 20 - Emitting layer; 21 - First pixel; 22 - Second pixel;

[0043] 30 - First light-collecting layer; 31 - First light-collecting unit of the first layer; 32 - Second light-collecting unit of the first layer;

[0044] 40 - Flattening layer;

[0045] 50 - Second light-collecting layer; 51 - Second layer, first light-collecting unit; 52 - Second layer, second light-collecting unit

[0046] 60 - First microlens; 70 - Second microlens; 70a - Block microlens; 70b - Second plano-convex lens; 80 - Third microlens; 90 - Fourth microlens;

[0047] 110 - First encapsulation layer; 120 - Second encapsulation layer. Detailed Implementation

[0048] The embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the embodiments described below with reference to the accompanying drawings are exemplary descriptions for explaining the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions of the embodiments of this application.

[0049] Those skilled in the art will understand that, unless otherwise stated, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be understood that when we say an element is “connected” or “coupled” to another element, the element may be directly connected or coupled to the other element, or it may mean that the element and the other element are connected through an intermediate element. The term “and / or” as used herein refers to at least one of the items defined by the term; for example, “A and / or B” can be implemented as “A,” or as “B,” or as “A and B.”

[0050] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0051] The research and development concept of this application includes: the white light color dots displayed on the display panel are unbalanced. The reason for this is that the extraction rate of one or more colors of light is different from that of other colors of light, which leads to differences in the intensity of each color of light emitted from the second light extraction layer. Therefore, the white light color dots containing the first color light and the second color light are unbalanced.

[0052] The display device provided in this application is intended to solve the above-mentioned technical problems of the prior art.

[0053] The technical solution of this application and how it solves the above-mentioned technical problems are described in detail below with specific embodiments. It should be noted that the following embodiments can be referenced, borrowed, or combined with each other, and the same terms, similar features, and similar implementation steps in different embodiments will not be described again.

[0054] Please refer to Figure 1 This application provides a display panel 100, including: a stacked light-emitting layer 20, a first light-collecting layer 30, a planarization layer 40, and a second light-collecting layer 50.

[0055] The light-emitting layer 20 includes a plurality of first pixels 21 for emitting a first color light and second pixels 22 for emitting a second color light. The second light-collecting layer 50 includes a second layer of first light-collecting units 51 corresponding one-to-one with the first pixels 21.

[0056] The first light-collecting layer 30 is used to refract the first color light and the second color light.

[0057] The refractive index of the planarization layer 40 is less than that of the first light-collecting unit 51 in the second layer.

[0058] The second light-collecting unit 51 is used to refract at least a portion of the first color light passing through the planarization layer 40, so that the intensity of the first color light and the second color light emitted from the second light-collecting layer 50 are the same.

[0059] In this embodiment, a first light-collecting layer 30 and a second light-collecting layer 50 are provided on one side of the light-emitting layer 20 of the display panel 100. The first light-collecting layer 30 can extract (refract) the light of each color emitted by the light-emitting layer 20 for the first time. The light emitted from the first light-collecting layer 30 will undergo a certain degree of refraction or total internal reflection after passing through the planarization layer 40. In this application, a second layer of first light-collecting unit 51 corresponding to the first pixel 21 is provided on the side of the planarization layer 40 away from the first light-collecting layer 30. The refractive index of the planarization layer 40 is less than that of the second layer of first light-collecting unit 51, so that the light can be directed towards the planarization layer 40 with a lower refractive index. The second layer first light-collecting unit 51 with a higher refractive index causes at least a portion of the first color light that might otherwise undergo total internal reflection within the planarization layer 40 to be refracted and emitted within the second layer first light-collecting unit 51. This achieves the extraction of at least a portion of the first color light within the planarization layer 40, ensuring that the extraction rate of the first color light emitted from the second light-collecting layer 50 is consistent with the extraction rate of the second color light, and that the intensity of the first color light emitted from the second light-collecting layer 50 is consistent with the intensity of the second color light. This enables the white light containing both the first and second color lights to reach a balanced state, thereby improving the display effect of the display panel 100.

[0060] Optionally, the planarization layer 40 is an organic layer. When the first color light is incident on the second light-extracting layer 50 with a high refractive index in the low refractive index organic layer, the extraction rate of the first color light can be increased and the brightness of the first color light can be improved.

[0061] Optionally, the light-emitting layer 20 is located on the substrate 10.

[0062] Optionally, the first pixel 21 includes a blue sub-pixel, the first color light includes blue light, and the second pixel 22 includes a red sub-pixel or a green sub-pixel, the second color light includes red light or green light.

[0063] Optionally, the first pixel 21 includes a blue sub-pixel, the first color light includes blue light, the second pixel 22 includes a red sub-pixel or a yellow sub-pixel, and the second color light includes red light or yellow light.

[0064] It is understood that the light-emitting layer 20 includes multiple pixel units, each pixel unit including a first pixel 21 and a second pixel 22.

[0065] For some possible implementations, please refer to Figure 2 The second light-collecting layer 50 also includes a second light-collecting unit 52 corresponding to the second pixel 22.

[0066] The refractive index of the second light-collecting unit 52 in the second layer is less than the refractive index of the first light-collecting unit 51 in the second layer and greater than the refractive index of the planarization layer 40.

[0067] The second light-collecting unit 52 of the second layer is used to refract at least a portion of the second color light passing through the planarization layer 40, so that the intensity of the first color light and the second color light emitted from the second light-collecting layer 50 is the same.

[0068] In this embodiment, the second light-collecting unit 52 of the second layer refracts at least a portion of the second-color light passing through the planarization layer 40, so that at least a portion of the second-color light that might otherwise undergo total internal reflection within the planarization layer 40 is extracted by the second light-collecting unit 52. This results in the second-color light being extracted twice, once by the first light-collecting layer 30 and again by the second light-collecting unit 52, thus achieving the designed brightness. Since the refractive index of the second light-collecting unit 52 is not greater than that of the first light-collecting unit 51, the extraction rate of the first-color light by the first light-collecting unit 51 is ensured to be consistent with the extraction rate of the second-color light by the second light-collecting unit 52, ensuring that the intensities of the first-color light and the second-color light emitted from the second light-collecting layer 50 are consistent.

[0069] Optionally, the second layer first light-collecting unit 51 includes a third microlens 80 array, and the second layer second light-collecting unit 52 includes a fourth microlens 90 array, wherein the refractive index of the third microlens 80 is greater than the refractive index of the fourth microlens 90.

[0070] Optionally, the refractive index of the second layer first light-collecting unit 51 is equal to that of the second layer second light-collecting unit 52, or the refractive index of the third microlens 80 may be equal to that of the fourth microlens 90. For example, in the first step of light extraction, the extraction of the second color light is suppressed, making the extraction rate of the first color light greater than that of the second color light. Then, in the second step of light extraction, the first and second color lights are further extracted. The refractive index of the third microlens 80 is equal to that of the fourth microlens 90, resulting in a lower extraction rate of the first color light and a higher extraction rate of the second color light in the second step, until the extraction rates of the first and second color lights tend to be balanced.

[0071] It is understood that the consistent light intensity described in this application does not necessarily mean that the light intensity is exactly the same, as long as it is within a reasonable error range.

[0072] In some possible implementations, the first light-collecting layer 30 includes: a first light-collecting unit 31 located between the first pixel 21 and the second first light-collecting unit 51, and a first second light-collecting unit 32 located between the second pixel 22 and the second second light-collecting unit 52.

[0073] The refractive index of the first light-collecting unit 31 in the first layer is greater than the refractive index of the second light-collecting unit 32 in the first layer.

[0074] In this embodiment, the first light-collecting layer 30 sets corresponding first-layer first light-collecting unit 31 and first-layer second light-collecting unit 32 for the first pixel 21 and the second pixel 22, respectively. The refractive index of the first-layer first light-collecting unit 31 is greater than that of the first-layer second light-collecting unit 32. This is equivalent to suppressing the extraction of the second color light in the first step of light extraction. In the second step of light extraction, the second light-collecting layer 50 further extracts the first color light and the second color light simultaneously, which plays a certain compensating role for the second color light suppressed in the first step. The intensity of the first color light and the second color light emitted by the second light-collecting layer 50 reaches a balance, and the brightness is also within a suitable range, avoiding the situation where the brightness of the display panel 100 dims due to the extraction of the suppressed second color light.

[0075] Optionally, taking the first pixel 21 as a blue sub-pixel as an example, the specific film structure of the display panel 100 provided in this application will be explained below. Specifically, each pixel unit includes a blue sub-pixel, a red sub-pixel, and a green sub-pixel. The blue sub-pixel has a corresponding first layer first light-collecting unit 31, the red sub-pixel has a corresponding first layer second light-collecting unit 32, and the green sub-pixel has a corresponding first layer third light-collecting unit. Since the light-collecting layer is conventionally made using a microlens array, which has a large absorption effect on blue light, this application uses the high-refractive-index first layer first light-collecting unit 31 to perform the first step of light extraction for blue light, the low-refractive-index first layer second light-collecting unit 32 to perform the first step of light extraction for red light, and the low-refractive-index first layer third light-collecting unit to perform the first step of light extraction for green light. This suppresses the extraction of red and green light during the first step of light extraction, and makes the extraction rates of red, green, and blue light after the first step of light extraction as balanced as possible. Then, the blue light is extracted in the second step through the second layer first light extraction unit 51 on the first layer first light extraction unit 31, the red light is extracted in the second step through the second layer second light extraction unit 52 on the first layer second light extraction unit 32, and the green light is extracted in the second step through the second layer third light extraction unit on the first layer third light extraction unit. The light intensity reduction caused by light loss in the first step light extraction process is compensated, so that the extraction rate of red, green and blue light is roughly the same after the two extraction steps.

[0076] For some possible implementations, please refer to Figure 2 The first light-collecting unit 31 of the first layer includes multiple arrayed first microlenses 60.

[0077] In this embodiment, the first color light is extracted by the first microlens array 60 during the first step of light extraction.

[0078] For some possible implementations, please refer to Figure 2The first layer second light-collecting unit 32 includes multiple arrayed first microlenses 60.

[0079] The distance between any two adjacent first microlenses 60 in the first light-collecting unit 31 of the first layer is less than the distance between any two adjacent first microlenses 60 in the second light-collecting unit 32 of the first layer.

[0080] In this embodiment, the first color light is also extracted in the first step by the array of first microlenses 60. However, the density of the arrays of first microlenses 60 is different between the first light-extracting unit 31 corresponding to the first pixel 21 and the first light-extracting unit 32 corresponding to the second pixel 22. The arrays of first microlenses 60 of the first light-extracting unit 31 are more densely arranged and have a higher refractive index than those of the first light-extracting unit 32. This allows for high extraction of the first color light and low extraction of the second color light in the first step of light extraction, thereby making the extraction rates of the first color light and the second color light approximately the same in the first step of light extraction.

[0081] Because the second color light is suppressed during the first light extraction process, the first light extraction unit 31 of the first layer also absorbs the first color light to a certain extent, so that neither the first color light nor the second color light that has only undergone the first light extraction process can achieve the preset display effect. Therefore, the first color light and the second color light are further extracted by the second light extraction layer 50, so that the intensity of each color light emitted by the second light extraction layer 50 can be balanced and the preset display effect (such as achieving the preset display brightness) can be achieved.

[0082] The following describes the technical solution for extracting high-level first-color light and low-level second-color light during the first light extraction process through the first light extraction layer 30.

[0083] Optionally, the array of first microlenses 60 in the first light-collecting unit 31 of the first layer is a close-packed array of microlenses, that is, the first microlenses 60 are close together with a very small or even zero spacing, while the array of first microlenses 60 in the second light-collecting unit 32 of the first layer has a spacing between them.

[0084] Optionally, the display panel 100 further includes a second encapsulation layer 120, which encapsulates the first microlens 60 array in the first layer first light-collecting unit 31 and the first microlens 60 array (or second microlens 70 array, or a combination array of first microlens 60 and second microlens 70, etc., see below) in the first layer second light-collecting unit 32. Taking the first layer second light-collecting unit 32 including the first microlens 60 array as an example, when there is a gap between the first microlens 60 arrays in the first layer second light-collecting unit 32, part of the second color light is emitted through the first microlens 60 and part is emitted through the gap (i.e., the second encapsulation layer 120). The refractive index of the second encapsulation layer 120 is less than the refractive index of the first microlens 60, so that the overall extraction rate of the second color light by the first layer second light-collecting unit 32 is lower than the overall extraction rate of the first color light by the first layer first light-collecting unit 31.

[0085] Optionally, the microlens array of the first light-collecting unit 31 and / or the second light-collecting unit 32 of the first layer can be directly encapsulated through the planarization layer 40, eliminating the need for an encapsulation layer and saving costs and processes.

[0086] Optionally, the refractive index of the second encapsulation layer 120 is less than the refractive index of the planarization layer 40.

[0087] For some possible implementations, please refer to Figure 3 The first layer second light-collecting unit 32 includes multiple arrayed second microlenses 70.

[0088] The spacing between any two adjacent first microlenses 60 in the first light-collecting unit 31 of the first layer is the same as the spacing between any two adjacent second microlenses 70 in the second light-collecting unit 32 of the first layer.

[0089] The refractive index of the first microlens 60 is greater than that of the second microlens 70.

[0090] In this embodiment, the first microlens 60 and the second microlens 70 have different refractive indices. In the first step of light extraction, microlens arrays with different refractive indices are used to extract the first color light and the second color light respectively. The density of the first microlens 60 arrays of the first layer first light extraction unit 31 corresponding to the first pixel 21 and the first layer second light extraction unit 32 corresponding to the second pixel 22 is the same. The second microlens 70 of the first layer first light extraction unit 31 has a smaller refractive index than the first microlens 60 of the first layer second light extraction unit 32. This enables high extraction of the first color light and low extraction of the second color light in the first step of light extraction, thereby making the extraction rates of the first color light and the second color light approximately the same in the first step of light extraction.

[0091] Generally, the refractive index of the planarization layer 40 is greater than that of the first microlens 60 in the first light-collecting unit 31 of the first layer, and also greater than that of the second microlens 70 in the second light-collecting unit 32 of the first layer. However, since the first step of light collection in this application is to make the light collection rates of the first color light and the second color light the same, or the light output intensity the same, and the magnitude of the light output intensity is not very important (because a second light collection process will be performed), in some cases, the refractive index of the planarization layer 40 may be less than that of the first microlens 60 in the first light-collecting unit 31 of the first layer, and greater than that of the second microlens 70 in the second light-collecting unit 32 of the first layer.

[0092] Optionally, any two adjacent first microlenses 60 within the first light-collecting unit 31 of the first layer are in close contact, and any two adjacent second microlenses 70 within the second light-collecting unit 32 of the first layer are in close contact.

[0093] In some possible implementations, the first layer second light-collecting unit 32 includes a plurality of arrayed first microlenses 60 and second microlenses 70.

[0094] Within the second light-collecting unit 32 of the first layer, the first microlens 60 and the second microlens 70 are arranged alternately in rows and / or columns.

[0095] In this embodiment, microlenses with different refractive indices are arranged alternately in the second light-extracting unit 32 of the first layer to form a combined microlens array of the first microlens 60 and the second microlens 70, which extracts the second color light in a low-frequency manner, thereby achieving the effect of suppressing the second color light in the first step of light extraction.

[0096] Please refer to Figure 4 and Figure 7 , Figure 4 This illustrates the staggered arrangement of the first microlens 60 and the second microlens 70 in both row and column directions. Figure 7 The diagram shows the first microlens 60 and the second microlens 70 arranged alternately in the row direction.

[0097] Optionally, any two adjacent microlenses within the second light-collecting unit 32 of the first layer are closely connected, that is, the staggered first microlenses 60 and second microlenses 70 form a closely connected microlens array.

[0098] It is understandable that a hemispherical microlens structure provides the best light extraction effect. Therefore, this application also provides the following possible implementations: the first microlens 60 is hemispherical, and the second microlens 70 is rectangular block-shaped, as can be referred to. Figure 6 The bulk microlens 70a in the middle.

[0099] For some possible implementations, please refer to Figure 5Both the first microlens 60 and the second microlens 70 are plano-convex lenses.

[0100] The planar radius of the first microlens 60 is the same as the planar radius of the second microlens 70, and the spherical radius of the first microlens 60 is smaller than the spherical radius of the second microlens 70. For example, in this embodiment, the second microlens 70 is a second plano-convex lens 70b.

[0101] In this embodiment, both the first microlens 60 of the first light-collecting unit 31 and the second microlens 70 of the first light-collecting unit 32 are plano-convex lenses, possessing both a plane and a spherical surface. When the plane radius of the first microlens 60 of the first light-collecting unit 31 is the same as that of the second plano-convex lens 70b of the first light-collecting unit 32 (i.e., their "area size" is the same), and when the density of the microlens arrays of the first light-collecting unit 31 and the first light-collecting unit 32 is the same, the spherical radius of the first microlens 60 is smaller than that of the second plano-convex lens 70b, resulting in a higher arch height for the first microlens 60 than for the second plano-convex lens 70b. The first microlens 60 is more hemispherical than the second plano-convex lens 70b, therefore, the light extraction rate of the first microlens 60 is higher than that of the second plano-convex lens 70b. The refractive index of the first light-collecting unit 31 is greater than that of the first light-collecting unit 32, resulting in lower extraction of the second color light and achieving the effect of suppressing the second color light during the first light extraction process.

[0102] In some possible implementations, the display panel 100 further includes:

[0103] The first encapsulation layer 110 is located between the light-emitting layer 20 and the first light-collecting layer 30. The refractive index of the first encapsulation layer 110 is less than the refractive index of the first light-collecting unit 31 in the first light-collecting layer 30.

[0104] In this embodiment, a first encapsulation layer 110 is also provided on one side of the light-emitting layer 20. The first color light emitted by the light-emitting layer 20 passes through the first encapsulation layer 110 and enters the first light-collecting unit 31 of the first layer, and then exits from the first light-collecting unit 31 of the first layer. The refractive index of the first encapsulation layer 110 is less than the refractive index of the first light-collecting unit 31 of the first layer in the first light-collecting layer 30, so that the first color light is directed from the low refractive index first encapsulation layer 110 to the high refractive index first light-collecting unit 31 of the first layer, which can increase the efficiency of light extraction.

[0105] Optionally, the refractive index of the first microlens 60 in the first light-collecting unit 31 is greater than the refractive index of the second microlens 70 in the first light-collecting unit 32. The relationship between the refractive index of the first encapsulation layer 110 and the refractive index of the second microlens 70 in the first light-collecting unit 32 is not particularly required. It can be that the refractive index of the first encapsulation layer 110 is greater than the refractive index of the second microlens 70 in the first light-collecting unit 32, or it can be that the refractive index of the first encapsulation layer 110 is less than the refractive index of the second microlens 70 in the first light-collecting unit 32.

[0106] Secondly, this application provides a display device, including any of the display panels 100 provided in the first aspect.

[0107] The display device provided in this embodiment includes any of the display panels 100 provided in the above embodiments, and their implementation principles are similar, so they will not be described again here.

[0108] By applying some embodiments of this application, at least the following beneficial effects can be achieved:

[0109] 1. In some embodiments, a first light-collecting layer 30 and a second light-collecting layer 50 are provided on one side of the light-emitting layer 20 of the display panel 100. The first light-collecting layer 30 can extract (refract) the light of each color emitted by the light-emitting layer 20 for the first time. The light emitted from the first light-collecting layer 30 will undergo a certain degree of refraction or total internal reflection after passing through the planarization layer 40. Since the extraction rate of the first color light after passing through the first light-collecting layer 30 is low, this application provides a second layer of first light-collecting unit 51 corresponding to the first pixel 21 on the side of the planarization layer 40 away from the first light-collecting layer 30. The refractive index of the planarization layer 40 is less than that of the second layer of first light-collecting unit 51. 1. Light can be directed from the planarization layer 40 with a lower refractive index to the first light-collecting unit 51 of the second layer with a higher refractive index, causing at least a portion of the first color light that might have undergone total internal reflection within the planarization layer 40 to be refracted and emitted within the first light-collecting unit 51 of the second layer. This achieves further extraction of the first color light, making the extraction rate of the first color light consistent with that of the second color light. The intensity of the first color light emitted from the second light-collecting layer 50 is consistent with that of the second color light, and the white light emitted from the second light-collecting layer 50, which includes the first color light and the second color light, reaches a balanced state, thereby improving the display effect of the display panel 100.

[0110] 2. In some embodiments, the first light-collecting layer 30 sets corresponding first-layer first light-collecting unit 31 and first-layer second light-collecting unit 32 for the first pixel 21 and the second pixel 22, respectively. The refractive index of the first-layer first light-collecting unit 31 is greater than the refractive index of the first-layer second light-collecting unit 32. This is equivalent to suppressing the extraction of the second color light in the first step of light extraction. Then, in the second step of light extraction, the second light-collecting layer 50 further extracts the first color light and the second color light simultaneously, which plays a certain compensating role for the second color light suppressed in the first step. The intensity of the first color light and the second color light emitted by the second light-collecting layer 50 reaches a balance, and the brightness is also within a suitable range, avoiding the situation where the brightness of the display panel 100 dims due to the extraction of the suppressed second color light.

[0111] 3. In some embodiments, the density of the first microlens 60 arrays of the first layer first light-collecting unit 31 corresponding to the first pixel 21 and the first layer second light-collecting unit 32 corresponding to the second pixel 22 is different. The first layer first light-collecting unit 31 has a denser arrangement of first microlenses 60 and a higher refractive index than the first layer second light-collecting unit 32. This enables high extraction of the first color light and low extraction of the second color light in the first step of light extraction, thereby making the extraction rates of the first color light and the second color light approximately the same in the first step of light extraction.

[0112] 4. In some embodiments, the first microlens 60 and the second microlens 70 have different refractive indices. In the first step of light extraction, microlens arrays with different refractive indices are used to extract the first color light and the second color light respectively. The density of the first microlens 60 arrays of the first layer first light extraction unit 31 corresponding to the first pixel 21 and the first layer second light extraction unit 32 corresponding to the second pixel 22 is the same. The second microlens 70 of the first layer first light extraction unit 31 has a smaller refractive index than the first microlens 60 of the first layer second light extraction unit 32. This enables high extraction of the first color light and low extraction of the second color light in the first step of light extraction, thereby making the extraction rates of the first color light and the second color light approximately the same in the first step of light extraction.

[0113] In the description of this application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate directions or positional relationships based on the exemplary directions or positional relationships shown in the accompanying drawings. They are used to facilitate the description or simplification of the embodiments of this application and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0114] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0115] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0116] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0117] The above description is only a partial implementation of this application. It should be noted that for those skilled in the art, other similar implementation methods based on the technical concept of this application, without departing from the technical concept of this application, also fall within the protection scope of the embodiments of this application.

Claims

1. A display panel, characterized in that, include: The stacked light-emitting layer, the first light-collecting layer, the planarization layer, and the second light-collecting layer; The light-emitting layer includes a plurality of first pixels for emitting a first color light and a second pixel for emitting a second color light; the second light-collecting layer includes a second layer of first light-collecting units that correspond one-to-one with the first pixels. The first light-collecting layer is used to refract the first color light and the second color light; The refractive index of the planarization layer is less than the refractive index of the first light-collecting unit in the second layer; The second light-collecting unit is used to refract at least a portion of the first color light passing through the planarization layer, so that the intensity of the first color light and the second color light emitted from the second light-collecting layer are the same. A first encapsulation layer is located between the light-emitting layer and the first light-collecting layer, and the refractive index of the first encapsulation layer is less than the refractive index of the first light-collecting unit in the first layer of the first light-collecting layer. The second light-collecting layer further includes a second layer of second light-collecting units that correspond one-to-one with the second pixel; The refractive index of the second light-collecting unit in the second layer is less than the refractive index of the first light-collecting unit in the second layer and greater than the refractive index of the planarization layer; The second light-collecting unit of the second layer is used to refract at least a portion of the second color light passing through the planarization layer, so that the intensity of the first color light and the second color light emitted from the second light-collecting layer is the same.

2. The display panel according to claim 1, characterized in that, The first light-harvesting layer includes: a first light-harvesting unit located between the first pixel and the second layer first light-harvesting unit, and a first layer second light-harvesting unit located between the second pixel and the second layer second light-harvesting unit; The refractive index of the first light-collecting unit in the first layer is greater than the refractive index of the second light-collecting unit in the first layer.

3. The display panel according to claim 2, characterized in that, The first light-collecting unit of the first layer includes multiple first microlenses arranged in an array.

4. The display panel according to claim 3, characterized in that, The first layer second light-collecting unit includes multiple arrays of the first microlenses; The distance between any two adjacent first microlenses in the first light-collecting unit of the first layer is less than the distance between any two adjacent first microlenses in the second light-collecting unit of the first layer.

5. The display panel according to claim 3, characterized in that, The first layer second light-collecting unit includes multiple second microlenses arranged in an array; The spacing between any two adjacent first microlenses in the first light-collecting unit of the first layer is the same as the spacing between any two adjacent second microlenses in the second light-collecting unit of the first layer; The refractive index of the first microlens is greater than that of the second microlens.

6. The display panel according to claim 3, characterized in that, The first layer second light-collecting unit includes multiple arrayed first microlenses and second microlenses; Within the second light-collecting unit of the first layer, the first microlens and the second microlens are arranged in an alternating row and / or column orientation.

7. The display panel according to claim 6, characterized in that, The first microlens is hemispherical, and the second microlens is rectangular.

8. The display panel according to claim 6, characterized in that, Both the first microlens and the second microlens are plano-convex lenses; The planar radius of the first microlens is the same as that of the second microlens, and the spherical radius of the first microlens is smaller than that of the second microlens.

9. A display device, characterized in that, include: The display panel as described in any one of claims 1-8.

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