CN111613647A - Display panel - Google Patents
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- CN111613647A CN111613647A CN202010333279.0A CN202010333279A CN111613647A CN 111613647 A CN111613647 A CN 111613647A CN 202010333279 A CN202010333279 A CN 202010333279A CN 111613647 A CN111613647 A CN 111613647A
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- 229920002120 photoresistant polymer Polymers 0.000 claims abstract description 212
- 239000011159 matrix material Substances 0.000 claims description 7
- 230000000007 visual effect Effects 0.000 abstract description 22
- 238000010586 diagram Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 9
- 230000002238 attenuated effect Effects 0.000 description 5
- 239000003086 colorant Substances 0.000 description 4
- 238000005538 encapsulation Methods 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000002093 peripheral effect Effects 0.000 description 1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
- G02B5/0215—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having a regular structure
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Abstract
The application relates to the technical field of display, in particular to a display panel, which comprises a light-emitting display layer and a light resistance layer, wherein the light-emitting display layer comprises a first light-emitting unit, a second light-emitting unit and a third light-emitting unit, and the brightness attenuation rate of light emitted by the side visual angle of the third light-emitting unit is smaller than that of light emitted by the side visual angles of the first light-emitting unit and the second light-emitting unit; the light resistance layer is positioned on one side of the light emitting display layer facing the light emitting surface, and comprises a plurality of first sub light resistance layers, second sub light resistance layers and third sub light resistance layers, wherein the first sub light resistance layers are arranged corresponding to the first light emitting units, the second sub light resistance layers are arranged corresponding to the second light emitting units, and the third sub light resistance layers are arranged corresponding to the third light emitting units; wherein the edge thickness of the first sub photoresist layer and/or the second sub photoresist layer is less than the edge thickness of the third sub photoresist layer. The display panel can improve the phenomenon of color cast under a large visual angle.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a display panel.
Background
An Organic Light-Emitting Diode (OLED), also called an Organic electroluminescent device, refers to a device in which a Light-Emitting material emits Light by carrier injection and recombination under the driving of an electric field. Organic light emitting display devices are lighter and thinner, have better viewing angles and contrast, and the like, compared to Liquid Crystal Display (LCD) devices, and thus have received much attention.
Ideally, the luminance of the different color light-emitting regions is attenuated to the same degree as the viewing angle increases, so that color shift is not caused. However, the luminance of the light emitting regions with different colors is attenuated to different degrees with the increase of the viewing angle, so that the color shift phenomenon is generated when the observation is carried out under a large viewing angle. Therefore, the problem of color shift at large viewing angles is to be solved for the display panel.
Disclosure of Invention
In view of the above, the present disclosure provides a display panel, which can improve the color shift phenomenon under a large viewing angle.
In order to solve the technical problem, the application adopts a technical scheme that: the display panel comprises a light-emitting display layer and a light resistance layer, wherein the light-emitting display layer comprises a first light-emitting unit, a second light-emitting unit and a third light-emitting unit, and the brightness attenuation rate of light emitted by a side visual angle of the third light-emitting unit is smaller than the brightness attenuation rate of light emitted by side visual angles of the first light-emitting unit and the second light-emitting unit; the light resistance layer is positioned on one side of the light emitting display layer facing the light emitting surface, and comprises a plurality of first sub light resistance layers, second sub light resistance layers and third sub light resistance layers which are arranged side by side, the first sub light resistance layers are arranged corresponding to the first light emitting units, the second sub light resistance layers are arranged corresponding to the second light emitting units, and the third sub light resistance layers are arranged corresponding to the third light emitting units; wherein the edge thickness of the first sub-photoresist layer and/or the second sub-photoresist layer is less than the edge thickness of the third sub-photoresist layer.
The edge thickness of the first sub-photoresist layer and/or the second sub-photoresist layer is smaller than that of the third sub-photoresist layer, so that the attenuation degree of light emitted by the third light emitting unit under a large visual angle can be relatively increased, the light intensity of the light emitted by the third light emitting unit under the large visual angle is reduced, and the phenomenon of color cast displayed at the large visual angle of the display panel can be improved.
Wherein the center thickness of the first sub-photoresist layer and/or the second sub-photoresist layer is equal to the center thickness of the third sub-photoresist layer. It is possible to ensure that the display panel emits light at a normal viewing angle without deviation.
Wherein, the ratio of the edge thickness of at least the third sub-photoresist layer to the edge thickness of the first sub-photoresist layer is equal to the fourth power of the ratio of the wavelength of the light emitted by the first light-emitting unit to the wavelength of the light emitted by the third light-emitting unit; and/or
The ratio of the edge thickness of the third sub-photoresist layer to the edge thickness of the second sub-photoresist layer is equal to the fourth power of the ratio of the wavelength of the light emitted by the second light emitting unit to the wavelength of the light emitted by the third light emitting unit. The color cast condition of the display panel under a large viewing angle can be improved to the greatest extent.
Wherein the edge thickness of the first sub-photoresist layer is less than the center thickness of the first sub-photoresist layer, and/or the edge thickness of the second sub-photoresist layer is less than the center thickness of the second sub-photoresist layer. The edge thickness of the first sub-photoresist layer and/or the second sub-photoresist layer is set to be smaller than the center thickness of the first sub-photoresist layer and/or the second sub-photoresist layer, so that the thickness of the light-adding group layer is not increased, the thickness of the display panel is thinner, and the phenomenon of large visual angle color cast of the display panel can be improved.
As a preferred scheme, the edge thickness of the third sub-photoresist layer is greater than the center thickness of the third sub-photoresist layer. The color cast phenomenon of the large visual angle of the display panel can be improved, and the display under the positive visual angle is ensured to be free from deflection.
Further, the cross section of the first sub-photoresist layer is of a single convex structure, and a convex part of the convex structure faces the first light-emitting unit and/or deviates from the first light-emitting unit; and/or
The cross section of the second sub-photoresist layer is of a single convex structure, and the convex part of the convex structure faces the second light-emitting unit and/or deviates from the second light-emitting unit. By providing a single convex structure, the phenomenon of large viewing angle color cast can be improved continuously.
Wherein, the surface of the convex structure is an arc surface or a step surface. The manufacturing process is simple and easy to manufacture, and the manufacturing process steps of the display panel are not increased.
The cross section of the third sub-photoresist layer is of a single concave structure, and the concave part of the concave structure faces the third light-emitting unit and/or deviates from the third light-emitting unit. By arranging a single concave structure, the phenomenon of large visual angle color cast can be improved continuously.
Further, the surface of the concave structure is an arc surface or a step surface. The manufacturing process is simple and easy to manufacture, and the manufacturing process steps of the display panel are not increased.
Wherein, a black matrix layer is arranged between the adjacent first sub photoresist layer, second sub photoresist layer and third sub photoresist layer of the photoresist layer, so that the first sub photoresist layer, the second sub photoresist layer and the third sub photoresist layer are connected into a layer through the black matrix layer. The color mixing is reduced and the influence of the ambient light is reduced.
The beneficial effect of this application is: different from the prior art, the present application provides a display panel, wherein the edge thickness of the third sub-photoresist layer is greater than the edge thickness of the first sub-photoresist layer, or the edge thickness of the third sub-photoresist layer is greater than the edge thickness of the second sub-photoresist layer, or the edge thickness of the third sub-photoresist layer is greater than the edge thicknesses of the first sub-photoresist layer and the second sub-photoresist layer, so that the light emitting distance from the light emitted by the third light emitting unit to the third sub-photoresist layer is greater at the lateral viewing angle, that is, the light emitting distance from the light emitted by the first light emitting unit to the first sub-photoresist layer is greater than the light emitting distance from the light emitted by the second light emitting unit to the second sub-photoresist layer is greater than; the light can be scattered when passing through the light resistance layer, the brightness of the light can be attenuated, when the light emitting distance passing through the light resistance layer is larger, the degree influenced by the scattering is stronger, and the degree of the light intensity attenuation is larger. In the embodiment of the application, under the side view angle, the light-emitting distance of the third light-emitting unit passing through the third sub light-blocking layer is larger, so that the attenuation degree of the third light-emitting unit passing through the third sub light-blocking layer can be increased, and the phenomenon of color cast of the third light-emitting unit under the side view angle, which is caused by the smaller attenuation rate, can be improved.
Drawings
FIG. 1 is a schematic structural diagram of a display panel according to a first embodiment of the present application;
FIG. 2 is a schematic structural diagram of a second embodiment of a display panel according to the present application;
FIG. 3 is a schematic structural diagram of a third embodiment of a display panel according to the present application;
FIG. 4 is a schematic structural diagram of a fourth embodiment of a display panel according to the present application;
FIG. 5 is a schematic structural diagram of a fifth embodiment of a display panel according to the present application;
FIG. 6 is a schematic structural diagram of a sixth embodiment of a display panel according to the present application;
FIG. 7 is a schematic structural diagram of a seventh embodiment of a display panel according to the present application;
FIG. 8 is an enlarged schematic view of region A of FIG. 7;
FIG. 9 is a schematic structural diagram of a third light-emitting unit according to an embodiment of the present disclosure;
FIG. 10 is a schematic diagram of a first embodiment of a first light-emitting unit of the present application;
fig. 11 is a schematic structural diagram of an embodiment of a second light-emitting unit according to the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
In the conventional display panel, the emission luminance of the different color light emitting regions is attenuated to different degrees with the increase of the viewing angle, for example, for three primary colors of light, the attenuation rate of red light and green light is large and the attenuation rate of blue light is small under a large viewing angle, so that the luminance of blue light is the highest and the luminance of red light and green light is relatively low, which results in that for the light with white color under a normal viewing angle, a user sees blue under a large viewing angle (for example, 30 ° to 89 °), that is, a white picture is bluish under a large viewing angle.
As shown in fig. 1, an embodiment of the present application provides a display panel, including a light emitting display layer 100 and a photoresist layer 200, where the light emitting display layer 100 includes a first light emitting unit 121, a second light emitting unit 122, and a third light emitting unit 123, and a brightness attenuation rate of light emitted from a side viewing angle of the third light emitting unit 123 is smaller than a brightness attenuation rate of light emitted from a side viewing angle of the first light emitting unit 121 and the second light emitting unit 122; the light resistance layer 200 is located on one side of the light emitting display layer 100 facing the light emitting surface, the light resistance layer 200 includes a plurality of first sub light resistance layers 210, second sub light resistance layers 220 and third sub light resistance layers 230, the first sub light resistance layers 210 are disposed corresponding to the first light emitting units 121, the second sub light resistance layers 220 are disposed corresponding to the second light emitting units 122, and the third sub light resistance layers 230 are disposed corresponding to the third light emitting units 123; the edge thickness of the first sub-photoresist layer 210 and/or the second sub-photoresist layer 220 is less than the edge thickness of the third sub-photoresist layer 230.
In the embodiment of the present application, by setting the edge thickness of the third sub-photoresist layer 230 to be greater than the edge thickness of the first sub-photoresist layer 210, or the edge thickness of the third sub-photoresist layer 230 to be greater than the edge thickness of the second sub-photoresist layer 220, or the edge thickness of the third sub-photoresist layer 230 to be greater than the edge thicknesses of the first sub-photoresist layer 210 and the second sub-photoresist layer 220, the light emitting distance from the third light emitting unit 123 to the third sub-photoresist layer 230 is greater at the side viewing angle, that is, the light emitting distance from the first light emitting unit 121 to the first sub-photoresist layer 210 is greater, or the light emitting distance from the second light emitting unit 122 to the second sub-photoresist layer 220 is greater; the light will be scattered when passing through the photoresist layer 200, the brightness of the light will be attenuated, when the light-emitting distance passing through the photoresist layer 200 is larger, the degree of the influence of scattering is stronger, and the degree of the light intensity attenuation is larger. In the embodiment of the present application, the light-emitting distance of the third light-emitting unit 123 passing through the third sub-photoresist layer 230 is larger in the side view angle, so that the attenuation degree of the third light-emitting unit 123 passing through the third sub-photoresist layer 230 can be increased, and the color cast phenomenon in the large view angle caused by the smaller attenuation rate of the third light-emitting unit 123 in the side view angle can be improved.
For convenience of describing the "light-emitting distance" passing through the sub-photoresist layer in the embodiment of the present application, as shown in fig. 9-11, an end point F on the center line on the sub-photoresist layer interface near the side of the light-emitting display layer 100 reaches an end point K on the light-emitting surface of the sub-photoresist layer at a side viewing angle, and the distance FK is the "light-emitting distance" passing through the sub-photoresist layer; under the visual angle of 30 degrees, the light-emitting distance is FK1(ii) a Under the viewing angle of 45 degrees, the light-emitting distance is FK2(ii) a Under the visual angle of 60 degrees, the light-emitting distance is FK3。
Specifically, in the embodiment of the present application, the first light emitting unit 121 is a red light emitting unit, the second light emitting unit 122 is a green light emitting unit, and the third light emitting unit 123 is a blue light emitting unit, so that the attenuation rate of red light and green light is large and the attenuation rate of blue light is small under a large viewing angle. In other embodiments, the first light emitting unit 121, the second light emitting unit 122, and the third light emitting unit 123 may also emit light of other colors, and white light may be emitted by color matching.
In the display panel of the embodiment of the application, the light resistance layer 200 is disposed on one side of the light emitting display layer 100 facing the light emitting surface, so that the light resistance layer 200 is utilized to reduce the ambient light irradiated to the display panel; specifically, for the three primary colors of light, the first sub-photoresist layer 210 may allow red light to pass through, and prevent green light and blue light from passing through, so that the red light emitted by the first light emitting unit 121 may be allowed to pass through, and light is emitted to one side of the light emitting surface, and the first sub-photoresist layer 210 may filter the external environment light, so that the green light and the blue light in the external environment cannot pass through the first sub-photoresist layer 210, and the amount of the red light in the external environment illuminated into the first light emitting unit 121 is small; the second sub-photoresist layer 220 can filter the light of the external environment, so that the red light and the blue light in the external environment cannot pass through the second sub-photoresist layer 220, and the amount of the green light in the external environment that irradiates the first light-emitting unit 121 is less; the third sub-photoresist layer 230 can filter the external environment light, so that the red light and the green light in the external environment cannot pass through the second sub-photoresist layer 220, and the amount of the blue light in the external environment that irradiates the first light emitting unit 121 is small, thereby reducing the interference of the external environment light to the display.
The black matrix layer 300 is disposed between the first sub photoresist layer 210, the second sub photoresist layer 220 and the third sub photoresist layer 230 of the photoresist layer 200, such that the first sub photoresist layer 210, the second sub photoresist layer 220 and the third sub photoresist layer 230 are connected to form a layer through the black matrix layer 300. By providing the black matrix layer 300, it is possible to reduce or prevent external ambient light from entering the region between the adjacent light emitting cells 120, and to improve display interference without affecting the light emission of the light emitting cells 120. The display panel of the embodiment of the application can be a flexible display panel and can also be a rigid display panel.
In the embodiment of the present application, the photoresist layer 200 includes three seed photoresist layers, and the "edge" of the sub-photoresist layer refers to the periphery along the center line of the sub-photoresist layer, and may be a region having an angle of 1 ° to 90 ° with respect to the center line, but not including an end value of 90 °, or a region having an angle of 30 ° to 89 °, or a region having an angle of 45 ° to 90 ° with respect to the center line, but not including an end value of 90 °, or a region having an angle of 60 ° to 90 ° but not including an end value of 90 °, or a region having an angle of 30 ° to 70 °; as shown in fig. 9 and 10, the vertex of the included angle is an end point F on the interface of the sub-photoresist layer near one side of the light-emitting display layer 100 and on the center line. As shown in fig. 4, 9 and 10, the sub-photoresist layer thickness refers to a distance of the sub-photoresist layer along the first direction D1; the "edge thickness" of the sub-photoresist layer is the distance between the corner of the side view and the light-emitting surface of the sub-photoresist layer along the first direction D1; the sub-photoresist layer "center thickness" is the distance along the first direction D1 from the center of the sub-photoresist layer.
In the embodiment of the present application, the light emitting display layer 100 includes a plurality of first light emitting units 121, second light emitting units 122, and third light emitting units 123, and the first light emitting units 121, the second light emitting units 122, and the third light emitting units 123 are arranged in an array. The specific shapes of the first light emitting unit 121, the second light emitting unit 122, and the third light emitting unit 123 are not particularly limited, and may be a quadrangle, a circle, a triangle, a polygon, or the like. In one embodiment, the light emitting display layer 100 specifically includes a substrate 110, a light emitting unit 120, and an encapsulation layer 130 covering the light emitting unit 120. The substrate 110 may include a substrate 110 and a pixel circuit array disposed on the substrate 110, and the light emitting unit 120 includes an anode layer, an organic light emitting layer, a cathode layer, and the like; the encapsulation layer 130 includes an inorganic thin film encapsulation layer and an organic thin film encapsulation layer, which are stacked, and the specific structure and material of the light emitting display layer 100 are not limited in this application, and may be set according to the display mode of the display panel.
Specifically, in an embodiment of the present application, as shown in fig. 1, the surfaces of the first sub-photoresist layer 210, the second sub-photoresist layer 220 and the third sub-photoresist layer 230 are all planar structures, and the overall thickness of the third sub-photoresist layer 230 can be controlled to be greater than the thicknesses of the first sub-photoresist layer 210 and the second sub-photoresist layer 220, so as to achieve the purpose of improving the large-viewing-angle color cast of the display panel. The sub-photoresist layer thickness in the embodiment of the present application refers to the distance of the sub-photoresist layer along the first direction D1. But with this approach there may be a risk that some deviation of the white light match may occur at the expense of the positive viewing angle. In the embodiment of the present application, a planarization layer 400 is further disposed on the photoresist layer 200, and the planarization layer 400 is a transparent layer and is disposed to planarize the photoresist layer 200 by disposing the planarization layer 400.
Therefore, in another preferred embodiment of the present application, as shown in fig. 2, in order to ensure that there is no white light deviation under the front viewing angle and improve the color deviation effect under the large viewing angle, the third sub-photoresist layer 230, the first sub-photoresist layer 210 and the second sub-photoresist layer 220 may have the same central thickness, so as to satisfy the requirement of matching the white light under the front viewing angle by manual adjustment, so that there is no white light deviation under the front viewing angle; meanwhile, by controlling the edge thickness of the first sub-photoresist layer 210 and the second sub-photoresist layer 220 to be smaller than the edge thickness of the third sub-photoresist layer 230, the color cast of the display panel with large viewing angle can be improved. The display panel can realize the phenomenon of no color cast in the display under the positive visual angle or the color cast under the large visual angle and is improved. In other embodiments, when the center thicknesses of the first sub-photoresist layer 210 and the second sub-photoresist layer 220 are different, the center thickness of the third sub-photoresist layer 230 may be set to be equal to the center thickness of the first sub-photoresist layer 210, or the center thickness of the third sub-photoresist layer 230 may be set to be equal to the center thickness of the second sub-photoresist layer 220; meanwhile, the edge thickness of the first sub-photoresist layer 210 or the second sub-photoresist layer 220 is controlled to be smaller than the edge thickness of the third sub-photoresist layer 230. The display under the positive visual angle has no deviation, and the phenomenon of color cast under the large visual angle is improved.
As a preferred embodiment of the present application, as shown in fig. 2, the edge thickness of the first sub-photoresist layer 210 is smaller than the center thickness of the first sub-photoresist layer 210; the edge thickness of the second sub-photoresist layer 220 is less than the center thickness of the second sub-photoresist layer 220. That is, the first sub-photoresist layer 210 and the second sub-photoresist layer 220 both have non-planar structures. Specifically, in the embodiment of the present application, the surface of the third sub-photoresist layer 230 is a planar structure, and in other embodiments, the surface of the third sub-photoresist layer 230 may also be a non-planar structure.
Further, the cross section of the first sub photoresist layer 210 has a single convex structure, that is, the cross section of the first photoresist layer 200 has an integral convex structure, and the convex part of the convex structure is away from the first light emitting unit 121. In another embodiment, as shown in fig. 5, the convex portion of the convex structure faces the first light emitting unit 121, and in yet another embodiment, as shown in fig. 6, the convex structure is a unitary double convex structure, and the convex portions face the first light emitting unit 121 and face away from the first light emitting unit 121, respectively. By providing a single convex structure, the thickness of the first sub-photoresist layer 210 along the central line to the peripheral direction of the first sub-photoresist layer 210 can be continuously changed; therefore, along with the increase of the viewing angle, the light-emitting distance of the first light-emitting unit 121 is gradually reduced compared with the planar sub-photoresist layer, so that the light-emitting distance of the first light-emitting unit 121 under the large viewing angle can be reduced, the dispersion degree is reduced, the attenuation degree of red light under the large viewing angle is reduced, and the color cast condition of the large viewing angle can be improved.
Preferably, as shown in fig. 2, the cross section of the second sub photoresist layer 220 has a single convex structure, that is, the cross section of the second sub photoresist layer 220 has an overall convex structure, and the convex portion of the convex structure faces away from the second light emitting unit 122. In another embodiment, as shown in fig. 5, the convex portion of the convex structure faces the second light emitting unit 122, and in yet another embodiment, as shown in fig. 6, the convex structure is a unitary biconvex structure, with the convex portions facing the second light emitting unit 122 and away from the second light emitting unit 122, respectively. By arranging the single convex structure, the thickness of the second sub photoresist layer 220 from the central line to the periphery of the second sub photoresist layer 220 can be continuously changed; therefore, as the viewing angle increases, the light emitting distance of the second light emitting unit 122 is gradually reduced compared with the planar sub-photoresist layer; therefore, the light emitting distance of the second light emitting unit 122 under a large viewing angle can be reduced, the dispersion degree is reduced, and the attenuation degree of green light under the large viewing angle is reduced, so that the color cast of the large viewing angle can be improved.
In other embodiments, as shown in fig. 7 and 8, the surface of the convex structure may also be a stepped surface. The surface of the convex structure is an arc surface or a step-shaped step surface, so that the manufacturing process of the display panel is simple and easy to manufacture in the manufacturing process, for example, the display panel can be manufactured by a half-tone mask or a gray-scale mask, and the continuity of the convex structure is strong.
As a preferred embodiment of the present application, as shown in fig. 3, the thickness of the edge of the third sub-photoresist layer 230 is greater than the thickness of the center of the third sub-photoresist layer 230. That is, the third sub-photoresist layer 230 has a non-planar structure, and the third sub-photoresist layer 230 has a non-planar structure by setting the edge thickness of the third sub-photoresist layer 230 to be greater than the center thickness, so that the edge thickness of the third sub-photoresist layer 230 is greater than the edge thickness of the first sub-photoresist layer 210 or the second sub-photoresist layer 220, thereby improving the color shift at large viewing angles. Specifically, in the embodiment of the present invention, the surfaces of the first sub-photoresist layer 210 and the second sub-photoresist layer 220 are planar structures, and in other embodiments, the surfaces of the first sub-photoresist layer 210 and the second sub-photoresist layer 220 may also be non-planar structures.
The cross section of the third sub-photoresist layer 230 is a single concave structure, that is, the third photoresist layer 200 on each third light emitting unit 123 is an integral concave structure, and the concave portion of the concave structure is away from the third light emitting unit 123. The arrangement of the single concave structure of the third sub-photoresist layer 230 in the embodiment of the application can continuously change the light-emitting distance of the light emitted by the third light-emitting unit 123 under a large viewing angle, increase the dispersion degree of the light emitted by the third light-emitting unit 123, and continuously reduce the light-emitting intensity of the light emitted by the third light-emitting unit 123, so that the color cast under the large viewing angle can be continuously improved. In other embodiments, as shown in fig. 5, the concave portion of the concave structure may also face the third light emitting unit 123; as shown in fig. 6, the concave structure may also have two concave portions with opposite directions, one concave portion facing the third light emitting unit 123 and the other concave portion facing away from the third light emitting unit 123.
The surface of the concave structure in the embodiment of the application is an arc-shaped surface, and in other embodiments, the arc-shaped surface is formed by the concave surface of the concave structure, so that the continuity of the concave structure is strong, and the smooth transition can be realized for the display of the display panel under a large visual angle. In other embodiments, as shown in fig. 7 and 8, the surface of the concave structure may also be a step surface, and by providing it as a step surface, the gradient of display at a large viewing angle of the display panel may also be improved.
In yet another embodiment, as shown in FIGS. 4-7, the first sub-photoresist layer 210, the second sub-photoresist layer 220 may be configured to have a convex structure, and the third sub-photoresist layer 230 may be configured to have a concave structure. The edge thickness of the first sub-photoresist layer 210 and the second sub-photoresist layer 220 is smaller than the edge thickness of the third sub-photoresist layer 230, and the overall thickness of the third sub-photoresist layer 230 can be relatively reduced, so that the overall thickness of the display panel can be reduced, and the color cast of the display panel under a large viewing angle can be improved.
How to ensure that there is no deviation under the front view angle, the color deviation under the large view angle is improved, and the influence parameters are more, in the embodiment of the present application, the center thickness of the first sub photoresist layer 210 and the second sub photoresist layer 220 is controlled to be equal to the center thickness of the third sub photoresist layer, and the center thickness of the first sub photoresist layer 210 is controlled to be equal to the center thickness of the second sub photoresist layer 220, and the center thicknesses of the three sub photoresist layers are controlled to be equal, so that there is no deviation of the white light under the front view angle; in other embodiments, the central thicknesses of the first sub-photoresist layer 210 and the second sub-photoresist layer 220 may not be equal, the central thickness of the third sub-photoresist layer may be equal to the central thickness of the first sub-photoresist layer 210, or the central thickness of the third sub-photoresist layer 230 may be equal to the central thickness of the second sub-photoresist layer 220, so as to facilitate the adjustment and control, so that the white light at the front viewing angle has no color shift.
Under the condition of ensuring no deviation under the positive viewing angle, how to improve the color cast condition under the large viewing angle to the maximum extent has more influence factors. In the embodiment of the present disclosure, the ratio of the edge thickness of the third sub-photoresist layer 230 to the edge thickness of the first sub-photoresist layer 210 is controlled to be equal to the fourth power of the ratio of the wavelength of the light emitted by the first light emitting unit 121 to the wavelength of the light emitted by the third light emitting unit 123, specifically, in the embodiment of the present disclosure, the ratio of the edge thickness of the third sub-photoresist layer 230 to the edge thickness of the first sub-photoresist layer 210 is controlled to be equal to the fourth power of the ratio of the wavelength of the red light to the wavelength of the blue light, so as to improve the color shift under a large viewing angle.
In the embodiment of the present application, the ratio of the edge thicknesses of the sub-photoresist layers is the ratio of the thicknesses of the sub-photoresist layers corresponding to the same included angle, for example, the edge thickness of the third sub-photoresist layer 230 is represented by H, and the edge thickness of the first sub-photoresist layer 210 is represented by M, wherein, as shown in fig. 9, the edge thickness of the third sub-photoresist layer 230 at the included angle of 30 ° is H1And an edge thickness H at a 45 DEG angle2And an edge thickness H at a 60 DEG angle3(ii) a As shown in FIG. 10, the first sub-photoresist layer 210 has an edge thickness M at a 30 DEG included angle1And an edge thickness M at a 45 DEG included angle2And an edge thickness M at a 60 DEG included angle3. In the embodiment of the present application, the edge thickness of the third sub-photoresist layer 230 satisfies any one or more of the following relations (1) H1/M1Not (R wavelength/B wavelength)4，(2)H2/M2Not (R wavelength/B wavelength)4，(3)H3/M3Not (R wavelength/B wavelength)4(ii) a Wherein, the R wavelength represents the red wavelength, the red wavelength is generally within the range of 605-700 nm, the B wavelength represents the blue wavelength, and the blue wavelength is generally within the range of 450-480 nm. For example, if the R wavelength is 650nm and the B wavelength is 470nm, (R wavelength/B wavelength)4When H is 3.66, H can be regulated1/M13.66, and/or H2/M23.66, and/or H3/M33.66. In the examples of the present applicationIn the 30 °, 45 °, and 60 ° included angles, all satisfy H/M of 3.66, or may satisfy H/M of 3.66 in the range of 30 ° to 89 °, in other embodiments, only the proportion of 60 ° included angles satisfies H/M of 3.66, or only the proportion of 30 ° included angles or 45 ° included angles satisfies H/M of 3.66.
Preferably, the ratio of the edge thickness of the third sub photoresist layer 230 to the edge thickness of the second sub photoresist layer 220 is equal to the fourth power of the ratio of the wavelength of the light emitted from the second light emitting unit 122 to the wavelength of the light emitted from the third light emitting unit 123. Specifically, in the embodiment of the present application, the ratio of the edge thickness of the third sub-photoresist layer 230 to the edge thickness of the second sub-photoresist layer 220 is equal to the fourth power of the ratio of the green light wavelength to the blue light wavelength. The edge thickness of the third sub-photoresist layer 230 is denoted by H and the edge thickness of the first sub-photoresist layer 210 is denoted by Q, wherein, as shown in FIG. 9, the edge thickness of the third sub-photoresist layer 230 at the 30 ° angle is H1And an edge thickness H at a 45 DEG angle2And an edge thickness H at a 60 DEG angle3(ii) a Continuing with FIG. 11, the second sub-photoresist layer 220 has an edge thickness Q at the 30 ° included angle1Edge thickness Q at a 45 DEG included angle2Edge thickness Q at a 60 DEG included angle3. In the embodiment of the present application, the edge thickness of the third sub-photoresist layer 230 satisfies any one or more of the following relations (1) H1/Q1Not (G wavelength/B wavelength)4，(2)H2/Q2Not (G wavelength/B wavelength)4，(3)H3/Q3Not (G wavelength/B wavelength)4(ii) a Wherein, the G wavelength represents green light wavelength, the green light wavelength is 500 nm-560 nm, the B wavelength represents blue light wavelength, and the blue light wavelength range is generally 450-480 nm. For example, if the G wavelength is 530nm and the B wavelength is 470nm (G wavelength/B wavelength)4When the ratio is 1.62, H can be regulated1/Q11.62, and/or H2/Q21.62, and/or H3/Q31.62. In the embodiment of the present application, H/Q is 1.62 when the included angles of 30 °, 45 ° and 60 ° satisfy, or H/Q is 1.62 when the included angles of 30 ° to 89 ° satisfy, and in other embodiments, H/Q is 1.62 when the included angles of 30 ° to 45 ° satisfyThe ratios at the included angles of only 60 ° may all satisfy H/Q of 1.62, or the ratios at the included angles of only 30 ° or 45 ° may all satisfy H/Q of 1.62.
According to the embodiment of the application, through the arrangement of the scheme, deviation-free under a positive visual angle can be guaranteed, the color cast condition under a large visual angle is improved to the maximum degree, and even the color cast condition under the large visual angle is eliminated, so that the display effect of the display panel is greatly improved.
The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present disclosure or those directly or indirectly applied to other related technical fields are intended to be included in the scope of the present disclosure.
Claims (10)
1. A display panel, comprising:
a light emitting display layer including a first light emitting unit, a second light emitting unit, and a third light emitting unit, a luminance decay rate of light emitted from a side viewing angle of the third light emitting unit being smaller than luminance decay rates of light emitted from side viewing angles of the first light emitting unit and the second light emitting unit;
the light resistance layer is positioned on one side of the light emitting display layer facing to the light emitting surface, and comprises a plurality of first sub light resistance layers, second sub light resistance layers and third sub light resistance layers, the first sub light resistance layers are arranged corresponding to the first light emitting units, the second sub light resistance layers are arranged corresponding to the second light emitting units, and the third sub light resistance layers are arranged corresponding to the third light emitting units;
wherein the edge thickness of the first sub photoresist layer and/or the second sub photoresist layer is less than the edge thickness of the third sub photoresist layer.
2. The display panel according to claim 1, wherein the center thickness of the first sub photoresist layer and/or the second sub photoresist layer is equal to the center thickness of the third sub photoresist layer.
3. The display panel according to claim 1 or 2, wherein the ratio of the edge thickness of the third sub photoresist layer to the edge thickness of the first sub photoresist layer is equal to the fourth power of the ratio of the wavelength of the light emitted by the first light emitting unit to the wavelength of the light emitted by the third light emitting unit; and/or
The ratio of the edge thickness of the third sub-photoresist layer to the edge thickness of the second sub-photoresist layer is equal to the fourth power of the ratio of the wavelength of the light emitted by the second light emitting unit to the wavelength of the light emitted by the third light emitting unit.
4. The display panel according to claim 1, wherein the edge thickness of the first sub photoresist layer is smaller than the center thickness of the first sub photoresist layer, and/or the edge thickness of the second sub photoresist layer is smaller than the center thickness of the second sub photoresist layer.
5. The display panel according to claim 1 or 4, wherein the third sub photoresist layer has an edge thickness greater than a center thickness of the third sub photoresist layer.
6. The display panel according to claim 4, wherein the cross section of the first sub photoresist layer is a single convex structure, and a convex part of the convex structure faces the first light emitting unit and/or faces away from the first light emitting unit; and/or
The cross section of the second sub-photoresist layer is of a single convex structure, and the convex part of the convex structure faces the second light-emitting unit and/or deviates from the second light-emitting unit.
7. The display panel according to claim 6, wherein the surface of the convex structure is an arc surface or a step surface.
8. The display panel according to claim 5, wherein the cross section of the third sub photoresist layer is a single concave structure, and a concave portion of the concave structure faces the third light emitting unit and/or faces away from the third light emitting unit.
9. The display panel according to claim 8, wherein the surface of the concave structure is an arc surface or a step surface.
10. The display panel of claim 1, wherein a black matrix layer is disposed between the first, second and third sub photoresist layers adjacent to the photoresist layer, such that the first, second and third sub photoresist layers are connected to form a layer via the black matrix layer.
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