Display panel and display device

Abstract

The invention discloses a display panel and a display device. The display panel includes: a pixel defining layer defining a plurality of pixel openings surrounded by the pixel defining layer; an optical adjustment layer located on one side of the pixel defining layer; the lens array layer is located on the side, away from the pixel limiting layer, of the optical adjusting layer, the lens array layer comprises a plurality of lens units corresponding to the pixel openings, and the vertical projections of the lens units and the vertical projections of the corresponding pixel openings are at least partially overlapped; the refractive index of the lens array layer is larger than that of the optical adjustment layer. The deflection angle of the light is changed by arranging the lens array layer and the light adjusting layer, so that the light is prevented from entering the pixel openings and being directly reflected, the reflectivity is reduced, the contrast ratio of the display panel is increased, and the visual effect of the display panel is improved.

Description

Technical Field

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

[0002] In recent years, with the development of the display industry, the market share of active-matrix organic light-emitting diodes (AMOLEDs) has gradually increased. The industry continues to pursue high performance and high display effects. However, the display effects of existing products are poor. Summary of the Invention

[0003] The present invention provides a display panel and a display device to solve the problem of poor visual effect.

[0004] According to one aspect of the present invention, there is provided a display panel, comprising:

[0005] a pixel defining layer, wherein the pixel defining layer defines a plurality of pixel openings surrounded by the pixel defining layer;

[0006] an optical adjustment layer, located on one side of the pixel defining layer, for adjusting the direction of light emitted from the optical adjustment layer to one side of the pixel defining layer;

[0007] a lens array layer, located on a side of the optical adjustment layer away from the pixel defining layer, and having a light converging function; the lens array layer includes a plurality of lens units corresponding to the pixel openings, wherein a vertical projection of the lens unit at least partially overlaps with a vertical projection of the pixel opening corresponding to the lens unit; the lens unit includes a first surface and a second surface, the first surface is located on a side of the second surface away from the optical adjustment layer, the second surface is a flat surface, and the first surface is a curved surface convex away from the optical adjustment layer;

[0008] The refractive index of the lens array layer is greater than the refractive index of the optical adjustment layer.

[0009] Optionally, the optical adjustment layer includes at least two stacked optical adjustment sublayers, and the refractive indices of the optical adjustment sublayers sequentially arranged along the light emitting direction of the pixel gradually increase;

[0010] Optionally, the optical adjustment layer includes two stacked optical adjustment sublayers.

[0011] Optionally, the display panel further includes:

[0012] a light-blocking layer located on a side of the optical adjustment layer away from the pixel defining layer, the light-blocking layer comprising a plurality of light-blocking portions and a plurality of light-transmitting portions corresponding to the pixel openings, the light-blocking portions at least partially surrounding the light-transmitting portions, and a vertical projection of the light-transmitting portions at least partially overlapping a vertical projection of the corresponding pixel openings;

[0013] For any of the pixel openings, there is an overlap between a vertical projection of the lens unit corresponding to the pixel opening, a vertical projection of the light-transmitting portion corresponding to the pixel opening, and the vertical projection of the pixel opening.

[0014] Optionally, for any pixel opening, a vertical projection of the lens unit corresponding to the pixel opening overlaps with a vertical projection of the light-transmitting portion corresponding to the pixel opening;

[0015] A vertical projection of the lens unit corresponding to the pixel opening or a vertical projection of the light-transmitting portion corresponding to the pixel opening covers a vertical projection of the pixel opening.

[0016] Optionally, the optical adjustment layer includes two stacked optical adjustment sublayers, namely a first optical adjustment sublayer and a second optical adjustment sublayer, and the first optical adjustment sublayer is located on a side of the second optical adjustment sublayer away from the pixel defining layer;

[0017] The product of a thickness of the first optical adjustment sublayer and a tangent of an incident angle of light when entering the second optical adjustment sublayer from the first optical adjustment sublayer is greater than or equal to half of a diameter of the pixel opening; wherein the incident angle of light when entering the second optical adjustment sublayer from the first optical adjustment sublayer is equal to a critical angle for total internal reflection of the light.

[0018] Optionally, the thickness T2 of the first optical adjustment sublayer satisfies the following formula:

[0019] T2≥[(n2 2 -n3 2 ) / n 3 ] 1 / 2 T0 / 2, n2 is the refractive index of the first optical adjustment sublayer, n3 is the refractive index of the second optical adjustment sublayer, and T0 is the diameter of the pixel opening.

[0020] Optionally, the sum of the product of the thickness of the first optical adjustment sublayer and the tangent of the first refraction angle, and the product of the thickness of the second optical adjustment sublayer and the tangent of the second refraction angle is greater than or equal to half the diameter of the pixel opening; wherein the first refraction angle is the exit angle of light when it is incident from the lens array layer to the first optical adjustment sublayer, and the second refraction angle is the exit angle of light when it is incident from the first optical adjustment sublayer to the second optical adjustment sublayer;

[0021] Optionally, the thickness value T2 of the first optical adjustment sublayer and the thickness value T3 of the second optical adjustment sublayer satisfy:

[0022]

[0023] n1 is the refractive index of the lens array layer, n2 is the refractive index of the first optical adjustment sublayer, n3 is the refractive index of the second optical adjustment sublayer, T0 is the diameter of the pixel opening, and θ6 is the incident angle of light from the lens array layer to the first optical adjustment sublayer.

[0024] Optionally, the lens array layer and the light blocking layer are located on the same layer;

[0025] A surface of the lens unit close to the optical adjustment layer is flush with a surface of the light blocking layer close to the optical adjustment layer.

[0026] Optionally, the display panel further includes:

[0027] The supporting layer is located between the pixel defining layer and the optical adjustment layer. The supporting layer includes a plurality of supporting columns corresponding to the pixel openings. The supporting columns are arranged around the corresponding pixel openings.

[0028] According to another aspect of the present invention, a display device is provided, comprising the display panel described in the above aspect.

[0029] In the technical solution of the embodiments of the present invention, a lens array layer and an optical adjustment layer are provided to change the angle of the incident light to prevent the light from being directly reflected at the pixel opening. Light with a large incident angle is refracted by the lens array layer and reflected at the interface of the optical adjustment layer. It is then absorbed by other film layers arranged on the side of the optical adjustment layer away from the pixel defining layer, reducing the reflectivity. Light with a small incident angle is refracted by the lens array layer and refracted again by the optical adjustment layer, increasing the angle of the light and incident on the position around the pixel opening. This avoids being reflected after directly incident on the pixel opening, reducing the reflectivity, increasing the contrast of the display panel, and improving the visual effect of the display panel.

[0030] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 A schematic structural diagram of a first light beam propagating in a display panel according to an embodiment of the present invention;

[0033] Figure 2 A schematic structural diagram of a second light beam propagating in a display panel according to an embodiment of the present invention;

[0034] Figure 3 A schematic diagram of a structure of a third light beam propagating in a display panel provided by an embodiment of the present invention;

[0035] Figure 4 A schematic structural diagram of a fourth light beam propagating in a display panel according to an embodiment of the present invention;

[0036] Figure 5 A schematic structural diagram of a fifth light beam propagating in a display panel according to an embodiment of the present invention;

[0037] Figure 6 A schematic diagram of a structure of a sixth light beam propagating in a display panel according to an embodiment of the present invention

[0038] Figure 7 A schematic structural diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0040] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof 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 necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0041] As described in the background technology, existing display products have poor display effects. The inventors have found that the reason is that the display products reflect external ambient light. The high reflectivity display screen will cause the screen to reflect the surrounding light, affecting the clarity and contrast of the image, resulting in poor visual effects.

[0042] In response to the above technical problems, the present invention provides a novel display panel to reduce the reflectivity of the display panel, increase the contrast of the display panel, and improve the visual effect of the display panel.

[0043] Figure 1 A schematic diagram of a structure of a first light beam propagating in a display panel provided by an embodiment of the present invention is shown. Figure 2 A schematic diagram of a structure of a second light beam propagating in a display panel according to an embodiment of the present invention, wherein the first light beam and the second light beam have different inclination angles, Figure 1 and Figure 2 , the display panel includes:

[0044] A pixel defining layer 10 , wherein the pixel defining layer 10 defines a plurality of pixel openings 101 surrounded by the pixel defining layer 10 ;

[0045] The optical adjustment layer 11 is located on one side of the pixel defining layer 10 along the light emitting direction of the pixel, and is used to adjust the direction of the light emitted from the optical adjustment layer 11 to the side of the pixel defining layer;

[0046] The lens array layer 12 is located on the side of the optical adjustment layer 11 away from the pixel defining layer 10 and has the function of converging light. The lens array layer 12 includes a plurality of lens units 121 corresponding to the pixel openings 101. The vertical projections of the lens units 121 at least partially overlap with the vertical projections of the pixel openings 101 corresponding to the lens units.

[0047] The refractive index of the lens array layer 12 is greater than the refractive index of the optical adjustment layer 11 .

[0048] The display panel may include a light emitting direction and a backlight direction arranged opposite to each other along the thickness direction, the light emitting direction being the side used to display the picture, and the backlight direction being the other direction arranged opposite to the light emitting direction along the thickness direction of the display panel. In this embodiment, the optical adjustment layer and the lens array layer are both arranged on the side of the light emitting direction of the pixel defining layer. The pixel defining layer 10 includes a plurality of pixel openings 101 arranged at intervals, each pixel opening 101 defining a sub-pixel. In the embodiment of the present application, the arrangement of the sub-pixels is not limited, and the arrangement of the sub-pixels may be a strip arrangement, an island arrangement, a mosaic arrangement, or a herringbone arrangement. In the embodiment of the present application, the shape of the sub-pixels is not limited, and the shape of each sub-pixel may not be polygonal, such as the shape of the sub-pixel may be circular or elliptical, which is not limited in the embodiment of the present invention. A light-emitting device of a sub-pixel is arranged in each pixel opening 101, and the light-emitting device includes a first electrode, a light-emitting layer, and a second electrode arranged in a stacked manner, wherein the second electrode is closer to the optical adjustment layer than the first electrode. The first electrode may be the anode of the light-emitting device, and the second electrode may be the cathode of the light-emitting device. The first electrode can adopt a three-layer structure, wherein the first layer and the third layer can be metal oxide layers, for example, indium tin oxide (ITO), indium zinc oxide (IZO), aluminum zinc oxide (AZO), and the middle second layer can be a metal layer (such as silver or copper). The light-emitting layer can include only a single film layer, that is, only a light-emitting material layer, or it can include a multilayer structure formed by a hole injection layer, a hole transport layer, a light-emitting material layer, an electron transport layer, and an electron injection layer stacked from the first electrode to the second electrode. When the substrate is a silicon substrate with a smaller size, the light-emitting layer can be paved with a white light-emitting layer to reduce the difficulty of the preparation process. In addition, a color filter layer is added to cover the white light-emitting layer to achieve a display of multiple colors; when the substrate is a larger hard substrate or a flexible substrate, the light-emitting layer can include at least a red light-emitting layer, a green light-emitting layer, and a blue light-emitting layer. The corresponding light-emitting devices can include multiple types, for example, a red light-emitting device, a blue light-emitting device, and a green light-emitting device, thereby achieving a display of multiple colors. The pixel defining layer 10 can be made of an organic material such as acrylic organic compound, polyamide, or polyimide, or an inorganic material such as silicon oxide, silicon nitride, silicon oxynitride, or aluminum oxide, which is not specifically limited in the embodiment of the present invention. The optical adjustment layer 11 is used to adjust the direction of the light emitted from the optical adjustment layer 11 to one side of the pixel defining layer 10, that is, to change the direction of the light incident on the optical adjustment layer 11. The lens array layer 12 includes a plurality of lens units 121 arranged in an array, and the lens units 121 correspond one-to-one to the pixel openings 101. Optionally, the lens units 121 can be convex lenses, which can be formed using acrylic UV curing resin, epoxy UV curing resin, or thermosetting resin.For example, the material of the lens 410 is selected from polyethylene terephthalate (PET), polycarbonate (PC), polyethylene (PE), polyvinyl chloride (PVC), polypropylene (PP), polystyrene (PS), and polymethylmethacrylate (PMMA).

[0049] Optionally, the lens unit 121 includes a first surface and a second surface, the first surface is located on the side of the second surface away from the optical adjustment layer 11, the second surface is a plane, and the first surface is a curved surface convex toward the optical adjustment layer. The lens array layer 12 includes a plurality of lens units 121 arranged in an array, and the lens unit 121 is a convex lens to minimize the influence on the direction of the incident light. The lens unit 121 includes a base (second surface) and a convex portion (first surface) for receiving external incident light. The convex portion (second surface) faces the light emitting direction of the sub-pixel, and the base (first surface) is parallel to the plane where the optical adjustment layer is located. It can be understood that the size of the lens unit 121 is not limited in the embodiment of the present application. In different embodiments, the size of the lens unit can be adjusted according to the angle of the external incident light that needs to be changed. When forming the lens units 121, a lens material layer is formed on one side of the optical adjustment layer 11, and then a photoresist is coated on the lens material layer. The photoresist is exposed and developed to form a photoresist pattern. The photoresist pattern is then transferred to the lens material layer by etching, so that the lens material layer is etched to form a plurality of lens units 121.

[0050] Optionally, the display panel further includes a substrate, which is disposed on a side of the pixel defining layer 10 away from the optical adjustment layer 11 and provides support for other film layers. The substrate may be a hard substrate formed of at least one polymer material such as glass, glass fiber reinforced plastic, or a flexible substrate formed of at least one material such as polyimide (PI), polyethylene naphthalate (PEN), or polyethylene terephthalate (PET). A drive array layer is also formed between the substrate and the pixel defining layer 10. The drive array layer includes a plurality of thin film transistors. The thin film transistors can be used to form a pixel drive circuit that drives the light-emitting elements in the sub-pixels to emit light. The vertical projections described above and elsewhere herein may be orthographic projections on the substrate. Optionally, the display panel further includes an encapsulation layer disposed between the pixel defining layer 10 and the optical adjustment layer 11. The encapsulation layer is used to prevent external water and oxygen from entering the pixel opening, thereby preventing water and oxygen intrusion from damaging the display function of the display panel. The encapsulation layer may be a thin film encapsulation (TFE). The encapsulation layer may be composed of multiple layers of encapsulation material, and this application does not limit this. For example, the encapsulation layer may include a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer stacked on the pixel defining layer. In this embodiment, the display panel may be an organic light-emitting display panel, a micro-LED display panel, an electrophoretic display panel, or the like.

[0051] In this embodiment, the refractive index of the optical adjustment layer 11 can be uniform throughout, so that light entering the optical adjustment layer 11 from the lens array layer 12 undergoes a single deflection within the optical adjustment layer 11, i.e., is refracted once, before exiting the pixel defining layer once. Alternatively, the optical adjustment layer can have different refractive indices at at least two horizontal locations along the thickness of the display panel, so that light entering the optical adjustment layer 11 from the lens array layer 12 undergoes at least two deflections within the optical adjustment layer 11, i.e., is refracted at least twice, before exiting the pixel defining layer, thereby changing the direction of the incident light as much as possible.

[0052] like Figure 1As shown, after the first light is incident on the lens unit 121 from the outside, it is refracted once on the surface of the lens unit 121. When the first light is emitted from the lens unit 121 and deflected, it is refracted again at the incident surface of the optical adjustment layer 11, causing the first light to be deflected again. After the angle of the deflected first light reaches the critical angle for total internal reflection at the exit surface of the optical adjustment layer 11, the first light is reflected. The reflected light is absorbed by other film layers, such as film layers with light absorption function, disposed on the side of the optical adjustment layer away from the pixel defining layer 10. The first light cannot be incident on the pixel opening 101 and is not reflected at the pixel opening 101, thereby reducing the reflectivity. According to Snell's law, the relationship between refractive index and incident angle satisfies the following: n1·sinθ1=n0·sinθ2, where θ1 is the incident angle of light from the lens array layer 12 entering the optical adjustment layer 11, that is, the angle between the incident light and the first normal L1, and θ2 is the exit angle of light from the lens array layer 12 exiting the optical adjustment layer 11, that is, the angle between the exiting light and the first normal L1. The first normal L1 is a straight line perpendicular to the incident surface or exit surface of the optical adjustment layer 11. The refractive index n1 of the lens array layer 12 is set to be greater than the refractive index n0 of the optical adjustment layer, so that the exit angle θ2 is greater than the incident angle θ1, thereby increasing the angle between the first light and the first normal L1, increasing the deflection direction of the first light, and preventing the first light from entering the pixel opening 101, thereby reducing the reflectivity.

[0053] like Figure 2 As shown, compared to the first light, the angle between the second light and the second normal L2 is smaller, and the second normal L2 is parallel to the first normal L1. After the second light is incident on the lens unit 121 from the outside, it undergoes a refraction on the surface of the lens unit 121. When the second light, after being deflected, is emitted from the lens unit 121 to the optical adjustment layer 11, it is refracted again at the incident surface of the optical adjustment layer 11, causing the second light to be deflected again. Because the refractive index of the lens array layer 12 is greater than that of the optical adjustment layer 11, the incident angle θ3 of the second light on the optical adjustment layer 11 is smaller than the exit angle θ4, which increases the deflection direction of the second light. After deflection, the second light directly enters the periphery of the pixel opening 101 corresponding to the lens unit 121, preventing the first light from entering the pixel opening 101, thereby reducing the reflectivity. Among them, the initial incident angle of the first light is greater than the initial incident angle of the second light. The initial incident angle of the first light can be the angle between the first light incident from the outside to the lens array layer 12 and the first normal L1. The initial incident angle of the second light is the angle between the second light incident from the outside to the lens array layer 12 and the second normal L2. The second normal L2 is parallel to the first normal L1.

[0054] In the technical solution of the embodiments of the present invention, a lens array layer and an optical adjustment layer are provided to change the angle of the incident light to prevent the light from being directly reflected at the pixel opening. Light with a large incident angle is refracted by the lens array layer and reflected at the interface of the optical adjustment layer. It is then absorbed by other film layers arranged on the side of the optical adjustment layer away from the pixel defining layer, reducing the reflectivity. Light with a small incident angle is refracted by the lens array layer and refracted again by the optical adjustment layer, increasing the angle of the light and incident on the position around the pixel opening. This avoids being reflected after directly incident on the pixel opening, reducing the reflectivity, increasing the contrast of the display panel, and improving the visual effect of the display panel.

[0055] Figure 3 A schematic diagram of a structure of a third light propagating in a display panel provided by an embodiment of the present invention, with reference to Figure 3 Optionally, the optical adjustment layer 11 includes at least two stacked optical adjustment sublayers, and the refractive indices of the optical adjustment sublayers sequentially arranged along the light emitting direction of the pixel gradually increase.

[0056] The light emission direction of the pixel is from the pixel defining layer 10 to the lens array layer 12. The optical adjustment layer 11 includes multiple optical adjustment sublayers, and the refractive index of the optical adjustment sublayers arranged in sequence along the light emission direction of the pixel gradually increases, so that the deflection angle of the light gradually increases, thereby causing the light to gradually deviate from the direction of the pixel opening 101, preventing the light from being directly incident on the pixel opening 101 and being reflected. Optionally, the optical adjustment layer 11 includes two stacked optical adjustment sublayers, namely a first optical adjustment sublayer 111 and a second optical adjustment sublayer 112.

[0057] Continue to refer Figure 3 Optionally, the display panel further includes:

[0058] The light-blocking layer 13 is located on a side of the optical adjustment layer 11 away from the pixel defining layer 10. The light-blocking layer 13 includes a plurality of light-blocking portions 131 and a plurality of light-transmitting portions 132 corresponding to the pixel openings 101. The light-blocking portions 131 at least partially surround the light-transmitting portions 132. The vertical projections of the light-transmitting portions 132 at least partially overlap with the vertical projections of the corresponding pixel openings 101.

[0059] For any pixel opening 101 , there is overlap between the vertical projection of the lens unit 121 corresponding to the pixel opening 101 , the vertical projection of the light-transmitting portion 132 corresponding to the pixel opening 101 , and the vertical projection of the pixel opening 101 .

[0060] The light-blocking portion 131 has the function of absorbing light. The light projected onto the light-blocking portion 131 is absorbed by the light-blocking portion 131, so that the light will not pass through the light-blocking portion 131, nor will it be reflected by the light-blocking portion 131. The light-blocking portion 131 can be made of a black light-absorbing material. Optionally, the black light-absorbing material can be any one of black epoxy resin, molybdenum oxide, carbon black, and titanium dioxide. It should be understood that the above-mentioned black light-absorbing material is used to absorb light and can be a variety of materials not limited to those described in this embodiment. The light-blocking portion 131 can be formed on the light-blocking layer 13 on the same layer as the lens unit by coating or other methods and forming a corresponding pattern through a composition process. The light projected onto the light-transmitting portion 132 can pass through the light-transmitting portion 132. The light-transmitting portion 132 can, for example, be an opening or a light-transmitting layer formed by filling an opening with a low-light-absorbing medium. In this embodiment, the light-transmitting portion 132 can be set as an opening.

[0061] The pixel opening 101 corresponds to the lens unit 121 one-to-one, and the pixel opening 101 corresponds to the light-transmitting portion 132 one-to-one. The light emitted by the pixel set at the pixel opening 101 is emitted through the overlapping portion between the pixel opening 101, the lens unit 121 and the light-transmitting portion 132 to ensure that the display panel achieves normal display. Furthermore, for any pixel opening 101, the vertical projection of the lens unit 121 corresponding to the pixel opening 101 overlaps with the vertical projection of the light-transmitting portion 132 corresponding to the pixel opening 101. The vertical projection of the lens unit 121 corresponding to the pixel opening 101 or the vertical projection of the light-transmitting portion 132 corresponding to the pixel opening 101 covers the vertical projection of the pixel opening 101. In an optional embodiment, the lens unit 121 is set at the corresponding light-transmitting portion 132.

[0062] Light emitted by the pixel arranged at the pixel opening 101 is emitted through the light-transmitting portion 132 and the lens unit 121 corresponding to the pixel opening 101 , so that there is no obstruction above the pixel opening 101 , reducing the light obstruction rate and ensuring that the display panel has a high transmittance.

[0063] The lens array layer 12 and the light-blocking layer 13 may be located in different layers or in the same layer. The surface of the lens array layer 12 on the side close to the pixel defining layer 10 may be higher than, lower than, or even flush with the surface of the light-blocking layer 13 on the side close to the pixel defining layer 10, and this embodiment does not specifically limit this.

[0064] In this embodiment, the light blocking layer 13 is provided so that light reflected from the optical adjustment layer 11 or light reflected from the pixel opening 101 can be absorbed by the light blocking portion 131 , thereby reducing light reflectivity and improving display effects.

[0065] Continue to refer Figure 3 , Optionally, the lens array layer 12 and the light blocking layer 13 are located in the same layer;

[0066] The surface of the lens unit 121 close to the optical adjustment layer 11 is flush with the surface of the light blocking layer 13 close to the optical adjustment layer 11 .

[0067] The surface of the light-blocking layer 13 close to the optical adjustment layer 11 and the surface of the lens unit 121 close to the optical adjustment layer 11 are arranged at a parallel height, so that the reflected light is directly absorbed by the light-blocking portion 131 after being reflected.

[0068] In this embodiment, the optical adjustment layer 11 includes two stacked optical adjustment sublayers, namely a first optical adjustment sublayer 111 and a second optical adjustment sublayer 112 . The first optical adjustment sublayer 111 is located on a side of the second optical adjustment sublayer 112 away from the pixel defining layer 10 .

[0069] In this embodiment, after the third light ray is incident on the lens unit 121, it undergoes a light deflection. The third light ray then sequentially enters the first optical adjustment sublayer 111 and the second optical adjustment sublayer 112 from the lens unit 121. The third light ray undergoes a light deflection upon entering the first optical adjustment sublayer 111 and another light deflection upon entering the second optical adjustment sublayer 112, causing the deflection angle of the third light ray to gradually increase. After exiting the second optical adjustment sublayer 112 and reaching the edge region of the pixel opening 101, the third light ray is reflected. The reflected light ray sequentially passes through the second optical adjustment sublayer 112 and the first optical adjustment sublayer 111 and is projected onto the light-blocking portion 131 surrounding the light-transmitting portion 132 corresponding to the pixel opening 101. The reflected light ray is absorbed by the light-blocking portion 131, thereby reducing the reflectivity of the display panel.

[0070] Figure 4 A schematic diagram of a structure of a fourth light beam propagating in a display panel according to an embodiment of the present invention is provided. Figure 4 Optionally, the product of the thickness of the first optical adjustment sublayer 111 and the tangent of the incident angle of light when it enters the second optical adjustment sublayer 112 from the first optical adjustment sublayer 111 is greater than or equal to half the diameter of the pixel opening 101. The incident angle of light when it enters the second optical adjustment sublayer 112 from the first optical adjustment sublayer 111 is equal to the critical angle for total internal reflection of the light.

[0071] Total internal reflection refers to the phenomenon that when light is incident from a denser medium to an optically sparser medium, all light is reflected back into the original medium. When light enters an optically sparser medium from a denser medium, when the incident angle increases to a certain level, the refraction line extends along the surface, that is, the refraction angle is 90°. This incident angle is called the critical angle. If the incident angle is greater than the critical angle, there is no refraction, and all light returns to the denser medium. Because the vertical projection of the lens unit 121 needs to cover the vertical projection of the pixel opening 101, the diameter of the lens unit 121 is related to the diameter of the corresponding pixel opening 101. In an optional embodiment, the diameter of the lens unit 121 is equal to the diameter of the corresponding pixel opening 101. Figure 4 It can be seen that h1 = d1·tanθ5, where d1 is the thickness of the first optical adjustment sublayer 111, and θ5 is the incident angle of light when it enters the second optical adjustment sublayer 112 from the first optical adjustment sublayer 111, which is equal to the critical angle. h1 is greater than or equal to half the diameter T0 of the pixel opening 101, so that 2·h1 is greater than or equal to the diameter of the pixel opening 101. This prevents light from being reflected back into the lens unit 121, ensuring that the reflected light is projected onto the light blocking portion 131, where it is absorbed and reduces the reflectivity.

[0072] When the incident angle is the critical angle, the refraction angle is equal to 90°. Therefore, according to Snell's law, we can obtain: n2·sinθ5=n3.

[0073] h1=T2·tanθ3=T2·[(n3 / n2) / (1-(n3 / n2) 2 ) 1 / 2 ]=T2·(n2 2 / (n2 2 -n3 2 )) 1 / 2 ,

[0074] Since 2·h1≥T0, the thickness T2 of the first optical adjustment sublayer 111 satisfies the following formula:

[0075] T2≥[(n2 2 -n3 2 ) / n 3 ] 1 / 2 T0 / 2, n2 is the refractive index of the first optical adjustment sublayer 111 , n3 is the refractive index of the second optical adjustment sublayer 112 , and T0 is the diameter of the pixel opening.

[0076] Figure 5 A schematic diagram of a structure of a fifth light beam propagating in a display panel provided by an embodiment of the present invention is shown. Figure 6 A schematic diagram of a structure of a sixth light beam propagating in a display panel according to an embodiment of the present invention is provided. Figure 5 and Figure 6Optionally, the display panel further includes a support layer 14, which is located between the pixel defining layer 10 and the optical adjustment layer 11. The support layer 14 includes a plurality of support columns 141 corresponding to the pixel openings 101, and the support columns 141 are arranged around the corresponding pixel openings 101. The support columns can be black organic glue, which can absorb light. A support layer 14 is provided on the side of the pixel defining layer 10 of the display panel located in the light emitting direction. The support layer 14 includes a plurality of support columns 141, which surround the pixel openings and are used to support the cover plate in the display panel. The support columns 141 that play a supporting role are made of black organic glue, which can absorb strong external light, thereby reducing the incidence of external light into the sub-pixels and reducing the reflectivity. In one embodiment, the support columns can be cylindrical, cubic, rectangular, prism-shaped, truncated cone-shaped, stepped cone-shaped or other relatively regular shapes. Specifically, the support column can be cylindrical, cube, cuboid, or prism with consistent upper and lower surfaces. It can also be a truncated cone or stepped structure with a smaller upper portion and a larger lower portion. It can also be an inverted truncated cone or stepped structure with a larger upper portion and a smaller lower portion. It is understood that the specific shape of the support column can be selected based on the actual process and is not limited here.

[0077] like Figure 5 As shown, the fifth light is deflected by the lens array layer 12, the first optical adjustment sublayer 111 and the second optical adjustment sublayer 112 in sequence and then projected onto the pixel defining layer 10 and absorbed. Figure 6 As shown, the sixth light is deflected by the lens array layer 12 , the first optical adjustment sublayer 111 and the second optical adjustment sublayer 112 in sequence and then projected onto the support pillars 141 outside the pixel opening 101 and absorbed, thereby reducing the reflectivity.

[0078] To ensure that light, after being deflected by the lens array layer 12 and the optical adjustment layer 11, is projected toward the periphery of the pixel opening 101 rather than into the pixel opening 101, the sum of the second length h2 and the third length h3 must be greater than or equal to half the diameter T0 of the pixel opening 101. Specifically, the sum of the product of the thickness T2 of the first optical adjustment sublayer 111 and the tangent of the first refraction angle θ7, and the product of the thickness T3 of the second optical adjustment sublayer 112 and the tangent of the second refraction angle θ8, must be greater than or equal to half the diameter T0 of the pixel opening 101. The first refraction angle θ7 is the angle of incidence of light when it enters the first optical adjustment sublayer 111 from the lens array layer 12, and the second refraction angle θ8 is the angle of incidence of light when it enters the second optical adjustment sublayer 112 from the first optical adjustment sublayer 111. The second length h2 is equal to the product of the thickness T2 of the first optical adjustment sublayer 111 and the tangent value of the first refractive angle θ7, and the third length h3 is equal to the product of the thickness T3 of the second optical adjustment sublayer 112 and the tangent value of the second refractive angle θ8.

[0079] h2+h3≥0.5·T0;

[0080] h2=T2·tanθ7;

[0081] h3=T3·tanθ8;

[0082] n1·sinθ6=n2·sinθ7=n3·sinθ8;

[0083] According to the above formula, the thickness T2 of the first optical adjustment sub-layer 111 and the thickness T3 of the second optical adjustment sub-layer 112 finally satisfy:

[0084]

[0085] n1 is the refractive index of the lens array layer 12 , n2 is the refractive index of the first optical adjustment sublayer 111 , n3 is the refractive index of the second optical adjustment sublayer 112 , T0 is the diameter of the pixel opening 101 , and θ6 is the incident angle of light from the lens array layer 12 to the first optical adjustment sublayer 111 .

[0086] like Figures 3 to 6 As shown, the portion of the incident light with a large tilt angle, such as the fourth light ray, is refracted by the lens array layer 11 and the first optical adjustment sublayer 111, reflected at the contact surface between the first optical adjustment sublayer 111 and the second optical adjustment sublayer 112, and then absorbed by the light-blocking portion 131. The light with a small tilt angle is refracted by the interface between the two optical adjustment sublayers, and the angle of the light ray increases. Part of the light ray, such as the sixth light ray, is directly incident on the support column 141 and absorbed, while part of the light ray, such as the third light ray, is emitted by the anode located in the pixel opening 101 and is incident on the light-blocking portion 131 and absorbed by the light-blocking portion 131.

[0087] The present invention also provides a display device, Figure 7 A schematic diagram of a display device according to an embodiment of the present invention is provided. Figure 7 The display device includes the display panel 1 in any of the above embodiments, wherein the specific structure of the display panel has been described in detail in the above embodiments and will not be repeated here. The display device 2 in the embodiment of the present application can be Figure 7 The smartphone shown can also be a tablet computer, a television, an e-book reader, an MP3 (Moving Picture Experts Group Audio Layer III, Moving Picture Experts Compression Standard Audio Layer) player, an MP4 (Moving Picture Experts Group Audio Layer IV, Moving Picture Experts Compression Standard Audio Layer) player, a smart wearable display device, a portable computer, or other device with display function, and the embodiments of the present invention do not specifically limit this.

[0088] In the display device according to an embodiment of the present invention, a lens array layer and an optical adjustment layer are provided to alter the angle of incident light to prevent it from being directly reflected by the pixel opening. Light with a large incident angle is refracted by the lens array layer and then reflected at the interface of the optical adjustment layer. It is then absorbed by other layers of the optical adjustment layer located on the side of the optical adjustment layer away from the pixel defining layer, thereby reducing reflectivity. Light with a small incident angle is refracted by the lens array layer and then refracted again by the optical adjustment layer, increasing its angle and causing it to be incident on a position around the pixel opening. This prevents it from being directly reflected by the pixel opening, thereby reducing reflectivity, increasing the contrast of the display panel, and improving the visual quality of the display panel.

[0089] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0090] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A display panel, characterized in that: include: a pixel defining layer, wherein the pixel defining layer defines a plurality of pixel openings surrounded by the pixel defining layer; an optical adjustment layer, located on one side of the pixel defining layer, for adjusting the direction of light emitted from the optical adjustment layer to one side of the pixel defining layer; a lens array layer, located on a side of the optical adjustment layer away from the pixel defining layer, and having a light converging function; the lens array layer includes a plurality of lens units corresponding to the pixel openings, wherein a vertical projection of the lens unit at least partially overlaps with a vertical projection of the pixel opening corresponding to the lens unit; the lens unit includes a first surface and a second surface, the first surface is located on a side of the second surface away from the optical adjustment layer, the second surface is a flat surface, and the first surface is a curved surface convex away from the optical adjustment layer; The refractive index of the lens array layer is greater than the refractive index of the optical adjustment layer.

2. The display panel according to claim 1, wherein: The optical adjustment layer comprises at least two stacked optical adjustment sublayers, and the refractive indices of the optical adjustment sublayers arranged in sequence along the light emitting direction of the pixel gradually increase; Preferably, the optical adjustment layer includes two stacked optical adjustment sublayers.

3. The display panel according to claim 2, wherein: Also includes: a light-blocking layer located on a side of the optical adjustment layer away from the pixel defining layer, the light-blocking layer comprising a plurality of light-blocking portions and a plurality of light-transmitting portions corresponding to the pixel openings, the light-blocking portions at least partially surrounding the light-transmitting portions, and a vertical projection of the light-transmitting portions at least partially overlapping a vertical projection of the corresponding pixel openings; For any of the pixel openings, there is an overlap between a vertical projection of the lens unit corresponding to the pixel opening, a vertical projection of the light-transmitting portion corresponding to the pixel opening, and the vertical projection of the pixel opening.

4. The display panel according to claim 3, wherein: For any pixel opening, a vertical projection of the lens unit corresponding to the pixel opening overlaps with a vertical projection of the light-transmitting portion corresponding to the pixel opening; A vertical projection of the lens unit corresponding to the pixel opening or a vertical projection of the light-transmitting portion corresponding to the pixel opening covers a vertical projection of the pixel opening.

5. The display panel according to claim 4, wherein: The optical adjustment layer includes two stacked optical adjustment sublayers, namely a first optical adjustment sublayer and a second optical adjustment sublayer, wherein the first optical adjustment sublayer is located on a side of the second optical adjustment sublayer away from the pixel defining layer; The product of a thickness of the first optical adjustment sublayer and a tangent of an incident angle of light when entering the second optical adjustment sublayer from the first optical adjustment sublayer is greater than or equal to half of a diameter of the pixel opening; wherein the incident angle of light when entering the second optical adjustment sublayer from the first optical adjustment sublayer is equal to a critical angle for total internal reflection of the light.

6. The display panel according to claim 5, wherein: The thickness T2 of the first optical adjustment sublayer satisfies the following formula: T2≥[(n2 2 -n3 2 ) / n 3 ] 1 / 2 T0 / 2, n2 is the refractive index of the first optical adjustment sublayer, n3 is the refractive index of the second optical adjustment sublayer, and T0 is the diameter of the pixel opening.

7. The display panel according to claim 5, wherein: The sum of the product of the thickness of the first optical adjustment sublayer and the tangent of the first refraction angle, and the product of the thickness of the second optical adjustment sublayer and the tangent of the second refraction angle is greater than or equal to half of the diameter of the pixel opening; wherein the first refraction angle is the exit angle of light when it is incident from the lens array layer to the first optical adjustment sublayer, and the second refraction angle is the exit angle of light when it is incident from the first optical adjustment sublayer to the second optical adjustment sublayer; Preferably, the thickness value T2 of the first optical adjustment sublayer and the thickness value T3 of the second optical adjustment sublayer satisfy: n1 is the refractive index of the lens array layer, n2 is the refractive index of the first optical adjustment sublayer, n3 is the refractive index of the second optical adjustment sublayer, T0 is the diameter of the pixel opening, and θ6 is the incident angle of light from the lens array layer to the first optical adjustment sublayer.

8. The display panel according to claim 3, wherein: The lens array layer and the light blocking layer are located on the same layer; A surface of the lens unit close to the optical adjustment layer is flush with a surface of the light blocking layer close to the optical adjustment layer.

9. The display panel according to claim 1, wherein: Also includes: The supporting layer is located between the pixel defining layer and the optical adjustment layer. The supporting layer includes a plurality of supporting columns corresponding to the pixel openings. The supporting columns are arranged around the corresponding pixel openings.

10. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 9.

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