CN114335389A - Display panel and display device - Google Patents
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- CN114335389A CN114335389A CN202111653027.7A CN202111653027A CN114335389A CN 114335389 A CN114335389 A CN 114335389A CN 202111653027 A CN202111653027 A CN 202111653027A CN 114335389 A CN114335389 A CN 114335389A
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Abstract
The invention provides a display panel and a display device, relates to the technical field of display, and aims to improve the light extraction efficiency of the display panel and improve the dispersion problem caused by reflected ambient light. The display panel comprises a light extraction layer, the light extraction layer comprises a first light extraction unit and a second light extraction unit, the second light extraction unit is positioned on one side of the first light extraction unit, which is far away from the substrate, and the refractive indexes of the first light extraction unit and the second light extraction unit are different; the first light extraction unit includes a first subsection and a second subsection, and a shortest distance d between the second subsection and the first subsection satisfies:
L2is the maximum length of the first opening; h is1The height direction of the first subsection is parallel to the light emitting direction of the display panel; h is2Is between the bottom surface of the first subsection and the bottom surface of the luminescent layerThe bottom surface of the first subsection is the surface of the first subsection close to the substrate, and the bottom surface of the light-emitting layer is the surface of the light-emitting layer close to the substrate.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to a display panel and a display device.
[ background of the invention ]
With the continuous development of science and technology, more and more display devices are widely applied to daily life and work of people, and become an indispensable important tool for people at present.
An Organic Light-Emitting Diode (OLED) display panel is widely used in the display technology field because of its advantages of active Light emission, high contrast, no viewing angle limitation, and the like. Currently, the OLED display panel still has the problems of low light extraction efficiency and dispersion caused by reflecting ambient light.
[ summary of the invention ]
Embodiments of the present invention provide a display panel and a display device, which are used to improve the light extraction efficiency of the display panel and improve the dispersion problem caused by the reflected ambient light.
In one aspect, an embodiment of the present invention provides a display panel, including:
a substrate;
a display layer on one side of the substrate; the display layer comprises a pixel defining layer and a light emitting layer, the pixel defining layer comprises a first opening, and the light emitting layer is positioned in the first opening;
the light extraction layer is arranged corresponding to the light emitting layer and is positioned on one side, far away from the substrate, of the display layer; the light extraction layer comprises a first light extraction unit and a second light extraction unit, the second light extraction unit is positioned on one side of the first light extraction unit, which is far away from the substrate, and the refractive indexes of the first light extraction unit and the second light extraction unit are different;
the first light extraction unit includes a first subsection and a second subsection, and a shortest distance d between the second subsection and the first subsection satisfies:
wherein L is2The length direction of the first opening is parallel to the plane of the display panel; h is1The height of the first subsection is the height direction of the first subsection, and the height direction of the first subsection is parallel to the light emitting direction of the display panel; h is2The distance between the bottom surface of the first subsection and the bottom surface of the light-emitting layer, the bottom surface of the first subsection being the surface of the first subsection close to the substrate, and the bottom surface of the light-emitting layer being the bottom surface of the light-emitting layerThe light emitting layer is adjacent to a surface of the substrate.
In another aspect, an embodiment of the present invention provides a display device, including the display panel described above.
According to the display panel and the display device provided by the embodiment of the invention, the first light extraction unit and the second light extraction unit are arranged, when the light with the large visual angle is emitted to the outer side of the display panel, the light passes through the interface between the first light extraction unit and the second light extraction unit and is refracted or totally reflected, and then the propagation direction of the light deviates towards the normal direction of the display panel and is emitted from the display panel, so that the light extraction efficiency of the display panel can be improved.
In addition, according to the embodiment of the invention, the second sub-unit is arranged in the first light extraction unit, so that the external light passes through the second sub-unit and is reflected, refracted or scattered by the second sub-unit in the process of entering the display panel and in the process of being reflected by the display panel and being emitted from the display panel, the diffraction fringes of the reflected light emitted from the display panel can be continuous, and the color separation phenomenon can be avoided.
In addition, the embodiment of the present invention satisfies the following condition by making the shortest distance d between the second subsection and the first subsection:
the light with large visual angle emitted by the luminous layer positioned in the first opening can be ensured to be emitted to the first subsection without being interfered by the second subsection, and the light extraction efficiency of the display panel can be ensured while the color separation is reduced.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic cross-sectional view of a display panel according to an embodiment of the invention;
fig. 2 is an enlarged schematic view of a partial area of a display panel according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 4 is an enlarged schematic view of a partial area of another display panel according to an embodiment of the present invention;
FIG. 5 is an enlarged schematic view of a partial area of another display panel according to an embodiment of the present invention;
FIG. 6 is an enlarged schematic view of a partial area of another display panel according to an embodiment of the present invention;
FIG. 7 is an enlarged schematic view of a partial area of another display panel according to an embodiment of the present invention;
FIG. 8 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 9 is an enlarged schematic view of a partial area of another display panel according to an embodiment of the present invention;
FIG. 10 is a schematic cross-sectional view taken along line A1-A2 of FIG. 9;
fig. 11 is a schematic cross-sectional view of another display panel according to an embodiment of the invention;
FIG. 12 is an enlarged schematic view of a partial area of another display panel according to an embodiment of the present invention;
FIG. 13 is an enlarged schematic view of a partial area of another display panel according to an embodiment of the present invention;
fig. 14 is a schematic diagram of a display device according to an embodiment of the invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, etc. may be used to describe different light extraction units in the light extraction layer in embodiments of the present invention, the light extraction units should not be limited to these terms. These terms are used only to distinguish the light extraction units from each other. For example, the first light extraction unit may also be referred to as a second light extraction unit, and similarly, the second light extraction unit may also be referred to as a first light extraction unit, without departing from the scope of embodiments of the present invention.
An embodiment of the present invention provides a display panel, as shown in fig. 1, fig. 1 is a schematic cross-sectional view of a display panel provided in an embodiment of the present invention, and the display panel includes a substrate 1, a display layer 2, and a light extraction layer 3. The display layer 2 is located on one side of the substrate 1. The display layer 2 includes a pixel defining layer 21 and a light emitting layer 22. The pixel defining layer 21 includes a first opening 210, and the light emitting layer 22 is positioned in the first opening 210. The light extraction layer 3 is disposed corresponding to the light emitting layer 22, and the light extraction layer 3 is disposed on a side of the display layer 2 away from the substrate 1. The light extraction layer 3 includes a first light extraction unit 31 and a second light extraction unit 32, the second light extraction unit 32 is located on a side of the first light extraction unit 31 away from the substrate 1, and refractive indices of the first light extraction unit 31 and the second light extraction unit 32 are different. For example, the embodiment of the present invention may make the refractive index of the second light extraction unit 32 larger than the refractive index of the first light extraction unit 31. As shown in fig. 1, the display panel further includes an anode 201 and a cathode 202 on both sides of the light emitting layer 22.
In operation of the display panel, light emitted from the light-emitting layer 22 exits in a direction normal to the substrate 1, and there is a large amount of light rays with a large viewing angle that propagate in a direction away from the normal to the substrate 1. In the embodiment of the present invention, the light with a large viewing angle passes through the interface between the first light extraction unit 31 and the second light extraction unit 32 when exiting to the outside of the display panel. Since the refractive index of the second light extraction unit 32 is greater than that of the first light extraction unit 31, the light with a large viewing angle is refracted or totally reflected when passing through the interface between the first light extraction unit 31 and the second light extraction unit 32, and then the propagation direction of the light is deviated towards the normal direction of the display panel and emitted from the display panel, thereby improving the light extraction efficiency of the display panel.
Alternatively, as shown in fig. 1, the first light extraction unit 31 and the second light extraction unit 32 contact each other, and their shapes are complementary to each other.
Illustratively, as shown in fig. 1, the first section 311 includes a first side surface 3110; the angle α between the first side surface 3110 and the bottom surface of the first section 3111Satisfies the following conditions: alpha is more than 01Not more than 90 degrees; the first side face 3110 is capable of converting at least a portion of the high angle light emitted by the light emitting layer 22 to low angle light. In the embodiment of the present invention, the first side surface 3110 may be a curved surface or a flat surface. When the first side surface 3110 is a curved surface, an angle between the first side surface 3110 and the bottom surface of the first section 311 refers to an angle between a tangent plane of the first side surface 3110 at a position intersecting the bottom surface of the first section 311 and the bottom surface of the first section 311.
With continued reference to fig. 1, in the present embodiment, the first light extraction unit 31 includes a first subsection 311 and a second subsection 312, with a distance between the first subsection 311 and the second subsection 312. Illustratively, the materials of the first and second sub-portions 311 and 312 may be the same, and the refractive indices of the two may also be the same.
In the process of the ambient light propagating into the display panel, the second section 312 performs an optical action such as reflection, refraction, or scattering on the ambient light, and thus can change the propagation direction of the incident ambient light. Because some reflection structures, such as metal electrodes and metal traces, inevitably exist in the display panel, and the interface between the film layers with different refractive indexes in the display panel also reflects light. Therefore, the external ambient light is reflected after entering the display panel, and in the related art, the external ambient light is reflected to form a single periodic array of reflected lights, which are diffracted in the process of exiting to the outside of the display panel. The wavelengths of light rays transmitted by the sub-pixel regions with different colors are different, so that diffraction fringes of the same order are not overlapped, and color separation, namely dispersion phenomenon, is caused. The color separation phenomenon is particularly obvious when the display panel is in a dark state.
In the embodiment of the present invention, the second sub-portion 312 is disposed in the first light extraction unit 31, so that the external light passes through the second sub-portion 312 and is reflected, refracted or scattered by the second sub-portion 312 during the process of entering the display panel and the process of being reflected by the display panel and exiting the display panel, and the diffraction fringes exiting the display panel can be continuous, thereby avoiding the occurrence of the color separation phenomenon.
In the embodiment of the present invention, the shortest distance d between the second sub-section 312 and the first sub-section 311 satisfies:
wherein L is2The maximum length of the first opening 210, the length direction of the first opening 210 is parallel to the plane of the display panel; h is1The height of the first sub-portion 311 is, the height direction of the first sub-portion 311 is parallel to the light emitting direction of the display panel; h is2The distance between the bottom surface of the first subsection 311 and the bottom surface of the light-emitting layer 22 is defined as the distance between the bottom surface of the first subsection 311 and the bottom surface of the light-emitting layer 22, the bottom surface of the first subsection 311 is the surface of the first subsection 311 near the substrate 1, and the bottom surface of the light-emitting layer 22 is the surface of the light-emitting layer 22 near the substrate 1. With such an arrangement, it is ensured that the light with a large viewing angle emitted from the light-emitting layer 22 in the first opening 210 can be emitted to the first sub-portion 311 to reduce the possibility of interference by the second sub-portion 312, and the light of the display panel can be ensured while reducing color separationAnd (4) extraction efficiency.
Alternatively, as shown in fig. 1 and fig. 2, fig. 2 is an enlarged schematic view of a partial area of a display panel according to an embodiment of the present invention, in order to more clearly illustrate the positional relationship between the first and second sections and the first opening, fig. 2 omits other structures in the display panel, and the first light extraction unit 31 includes at least one second section 312. In the display panel provided in the embodiment of the present invention, the total area of the orthographic projection of the second sub-section 312 on the plane of the light extraction layer 3 is S1. For example, if the display panel includes M second sub-portions 312, where M is a positive integer, and an area of an orthogonal projection of the ith second sub-portion 312 on a plane where the light extraction layer is located is S1 — i, then
The orthographic projection areas of the different second sub-portions 312 on the plane of the light extraction layer may be the same, or the orthographic projection areas of the different second sub-portions 312 on the plane of the light extraction layer may be different.
As shown in fig. 1 and 2, the first section 311 includes a plurality of second openings 220, and the second section 312 is located in the second openings 220. The second light extraction unit 32 may fill the second opening 220. For example, the second opening 220 may correspond to the first opening 210. In the display panel provided in the embodiment of the invention, the total area of the second openings 220 is S2. For example, taking the example that the display panel includes N second openings 220, where N is a positive integer, and the area of the jth second opening 220 is S2 — j, the following are satisfied:
in the embodiment of the present invention, the areas of the different second openings 220 may be the same, or the areas of the different second openings 220 may be different.
In the embodiment of the present invention, it is,
so configured, while the second subsection 312 is provided to improve color separation, the second subsection can be avoidedThe area ratio of the portion 312 in the second opening 220 is too large, which is advantageous for reducing the influence of the second portion 312 on the small-angle light emitted from the light-emitting layer 22.
Alternatively, as shown in fig. 2, the display panel provided in the embodiment of the present invention includes a plurality of minimum repeating units 30 arranged repeatedly, and the minimum repeating unit 30 includes the first light extraction unit 31. In the embodiment of the present invention, the minimum repeating units 30 are arranged in an array in the plane of the display panel. In the minimal repeating unit 30, the area of the orthographic projection of the second subsection 312 on the plane of the light extraction layer 3 is S01, the area of the second aperture 220 is S02,
in different minimum repeating units, the area ratio of the second branches 312 in the corresponding second openings 220 may be set as different as possible, for example, for the second branch 312 corresponding to one of the second openings 220, the area ratio of the second branch 312 in the corresponding second opening 220 may be set to be slightly larger, for example, 28%, for the second branch 312 corresponding to another one of the second openings 220, the area ratio of the second branch 312 in the corresponding second opening 220 may be set to be slightly smaller, for example, 20%, and such a setting may not only satisfy the above requirements
The second sub-portions 312 in different minimal repeating units 30 can be provided with more various designs, which is more beneficial to improving the randomness of the distribution of the second sub-portions 312 and better improving the color separation phenomenon of the display panel.
Alternatively, as shown in fig. 1, the height of the second sub-portion 312 is less than or equal to 2 μm, and the height direction of the second sub-portion 312 is parallel to the light emitting direction of the display panel, so as to avoid affecting the light emitted from the light emitting layer 22 and emitted toward the first sub-portion 31.
The cross-sectional shape of the second section 312 shown in fig. 1 and the plan view shape of the second section 312 shown in fig. 2 are schematic, and in the actual design of the display panel, the second section 312 may be designed as any one or a combination of a cone, a column, a mesa, or an irregular shape. For example, the cross-sectional shape of the second sub-portion 312 in the plane perpendicular to the display panel may be designed to be any one or a combination of a trapezoid, a rectangle, a semicircle and an irregular figure, and the projection shape of the second sub-portion 312 in the plane parallel to the display panel may also be designed to be any one or a combination of a trapezoid, a rectangle, a circle and an irregular figure.
Optionally, as shown in fig. 3, fig. 3 is a schematic cross-sectional view of another display panel provided in the embodiment of the present invention, the display panel further includes a filter layer 5, the filter layer 5 includes a black matrix 51 and a filter unit 52, and the black matrix 51 and the filter unit 52 are located between the display layer 2 and the light extraction layer 3; the black matrix 51 includes a third opening 510; the filter unit 52 is at least partially located within the third opening 510. The light directed to the black matrix 51 can be absorbed by the black matrix 51. The black matrix 51 is disposed to prevent light emitted from two adjacent light emitting layers 22 from crosstalk with each other, thereby improving display contrast. In addition, the black matrix 51 may shield non-light emitting structures such as metal wirings and transistors in the display panel, thereby reducing visibility of the non-light emitting structures. The filter unit 52 can filter out a part of the color light to allow only a specific color light to exit. The orthographic projection of the filter unit 52 on the plane of the display layer 2 is at least partially overlapped with the corresponding light-emitting layer 22, and the light emitted from the light-emitting layer 22 can be emitted through the correspondingly arranged filter unit 52. In the embodiment of the present invention, the light emitting color of the light emitting layer 22 may be white or other composite light. Alternatively, the light emission color of the light emitting layer 22 may be any of monochromatic light such as red, green, and blue.
For example, the embodiment of the present invention may enable the filtering unit 52 to include a first color filtering unit 521, a second color filtering unit 522, and a third color filtering unit 523; when the light emission color of the light emitting layer 22 is set to include monochromatic light of the first color, the second color, and the third color, as shown in fig. 3, in a direction perpendicular to the plane where the display panel is located, the first color filter unit 521 overlaps the light emitting layer 22 that emits light of the first color, the second color filter unit 522 overlaps the light emitting layer 22 that emits light of the second color, and the third color filter unit 523 overlaps the light emitting layer 22 that emits light of the third color. Illustratively, the first color may be red, the second color may be green, and the third color may be blue.
In the embodiment of the present invention, the color purity of the sub-pixel with the corresponding color can be improved by providing the filtering unit 52. Moreover, in the embodiment of the present invention, the filter unit 52 can be disposed to replace the polarizer, which has the effect of reducing the emission of the reflected ambient light. Compared with the scheme of reducing the reflectivity of the display panel by arranging the polarizer, the embodiment of the invention can reduce the loss of the light emitted by the light emitting layer 22 in the emitting process by arranging the filtering unit 52, and increase the intensity of the light emitted by the display panel.
Optionally, in an embodiment of the present invention, the display panel includes a plurality of first color sub-pixels; the first color sub-pixel includes a first color filter unit 521 and a light emitting layer 22 provided corresponding thereto. The second sub-section 312 corresponding to the first color sub-pixel comprises at least two differently arranged first type sub-sections 3121 and second type sub-sections 3122. The distinguishing arrangement includes that the relative positions of the first type branches 3121 and the corresponding second openings 220 are different from the relative positions of the second type branches 3122 and the corresponding second openings 220, the area ratio of the first type branches 3121 in the corresponding second openings 220 is different from the area ratio of the second type branches 3122 in the corresponding second openings 220, the number of the first type branches 3121 in the corresponding second openings 220 is different from the number of the second type branches 3122 in the corresponding second openings 220, and the shape of the first type branches 3121 is different from the shape of the second type branches 3122. Optionally, the first color sub-pixel may be any one of a red sub-pixel, a green sub-pixel, and a blue sub-pixel.
With such an arrangement, the distribution of the second sub-portions 312 in the second openings 220 corresponding to the sub-pixels having the same color and located at different positions can be more random, the first sub-portions 3121 and the second sub-portions 3122 which are randomly distributed can have an effect of changing the distribution of the diffraction angles of the originally single periodic array reflected light, so that the diffraction angles of the reflected ambient light emitted from the display panel can be more continuous, and the color separation phenomenon can be avoided. Meanwhile, the color cast can be improved, and the visual angle uniformity of each azimuth angle is ensured.
For example, as shown in fig. 4, fig. 4 is an enlarged schematic view of a partial area of another display panel according to an embodiment of the present invention, and the area ratios of the first type sub-portion 3121 and the second type sub-portion 3122 in the corresponding second openings 220 are different. The area ratio of the first-type sub-portion 3121 in the corresponding second opening 220 is the ratio of the area of the orthographic projection of the first-type sub-portion 3121 on the plane of the light extraction layer to the area of the corresponding second opening 220, and the area ratio of the second-type sub-portion 3122 in the corresponding second opening 220 is the ratio of the area of the orthographic projection of the second-type sub-portion 3122 on the plane of the light extraction layer to the area of the corresponding second opening 220. For example, as shown in fig. 4, the areas of the second openings 220 corresponding to the first type sub-portions 3121 and the second openings 220 corresponding to the second type sub-portions 3122 may be the same, and the area of the front projection of the first type sub-portions 3121 on the plane of the light extraction layer is larger than the area of the front projection of the second type sub-portions 3122 on the plane of the light extraction layer, so as to implement the differentiated arrangement of the first type sub-portions 3121 and the second type sub-portions 3122.
Alternatively, the number of the first type sub-portions 3121 and the second type sub-portions 3122 in the corresponding second openings 220 may be different. As shown in fig. 5, fig. 5 is an enlarged schematic view of a partial area of another display panel according to an embodiment of the present invention, wherein for two first color sub-pixels 41, one of the first type sub-pixels 3121 is disposed correspondingly, and the other one of the first type sub-pixels 3121 is disposed correspondingly, so as to implement the differentiated disposition of the first type sub-pixels 3121 and the second type sub-pixels 3122.
Alternatively, in the embodiment of the present invention, the area ratios of the first type branches 3121 and the second type branches 3122 in the corresponding second openings 220 are the same, and the numbers of the first type branches 3121 and the second type branches 3122 in the corresponding second openings 220 are different. As shown in fig. 6, fig. 6 is an enlarged schematic view of a partial area of another display panel according to an embodiment of the present invention, wherein for two first color sub-pixels 41, one of the first type sub-pixels 3121 is disposed correspondingly, the other of the first type sub-pixels 3121 is disposed correspondingly, and the total area of the projections of the two second type sub-pixels 3122 is equal to the area of the front projection of the one first type sub-pixel 3121. In this way, the first type of subdivision 3121 and the second type of subdivision 3122 can be distinguished.
Alternatively, in the embodiment of the present invention, the area ratios of the first type sub-portions 3121 and the second type sub-portions 3122 in the corresponding second openings 220 may be the same, and the numbers of the first type sub-portions 3121 and the second type sub-portions 3122 in the corresponding second openings 220 may be the same; and the position of the first type sub-portion 3121 in the corresponding second opening 220 is different from the position of the second type sub-portion 3122 in the corresponding second opening 220, as shown in fig. 7, fig. 7 is an enlarged schematic view of a partial area of another display panel according to an embodiment of the present invention, wherein the orthogonal projection geometric center of the first type sub-portion 3121 in the plane of the display panel is directed to the geometric center of the corresponding second opening 220, and the orthogonal projection geometric center of the second type sub-portion 3122 in the plane of the display panel is directed to the geometric center of the corresponding second opening 220. In this way, the position of the first type of branch 3121 in the corresponding second opening 220 is different from the position of the second type of branch 3122 in the corresponding second opening 220, and the first type of branch 3121 and the second type of branch 3122 can be provided separately. Alternatively, in the embodiment of the present invention, the distance between the geometric center of the front projection of the first-type sub-portion 3121 on the plane of the display panel and the geometric center of the second opening 220 corresponding to the first-type sub-portion 3121 is different from the distance between the geometric center of the front projection of the second-type sub-portion 3122 on the plane of the display panel and the geometric center of the second opening 220 corresponding to the second-type sub-portion 3122, so that the positions of the first-type sub-portion 3121 in the corresponding second opening 220 are different from the positions of the second-type sub-portion 3122 in the corresponding second opening 220, thereby implementing the different arrangement of the first-type sub-portion 3121 and the second-type sub-portion 3122.
Optionally, the first sub-portion 311 includes a groove and/or a protrusion, as shown in fig. 8, fig. 8 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention, where the groove 61 and the protrusion 62 are simultaneously disposed in the first sub-portion 311, and an orthogonal projection of the groove 61 and the protrusion 62 on a plane where the filter layer 5 is located is at least partially located in the third opening 510 of the black matrix 51. So set up, when external environment light or reflection environment light passed through third opening 510 and propagated, thereby can pass through recess 61 and/or protruding 62 and can make the direction of propagation take place to deflect, play the effect that changes the diffraction angle distribution of single periodic array reverberation originally, can make the diffraction angle of the reflection environment light of following display panel outgoing more continuous, avoid appearing the color separation phenomenon.
Optionally, as shown in fig. 8, the groove 61 and the protrusion 62 are not overlapped with the first side face 3110 of the first sub-portion 311, that is, the groove 61 and the protrusion 62 are located in the flat area of the first sub-portion 311, so as to ensure the light extraction effect of the first sub-portion 31 and the second light extraction unit 32 on the light with large viewing angle, and avoid the light extraction effect of the first sub-portion 31 and the second light extraction unit 32 caused by the arrangement of the groove 61 and the protrusion 62.
Optionally, the display panel includes a plurality of first color sub-pixels; the grooves 61 and/or protrusions 62 corresponding to the first color sub-pixel at least comprise a first type of groove 611 and/or protrusion 621 and a second type of groove 612 and/or protrusion 622 which are arranged in a distinguishing manner. The distinguishing arrangement includes that the relative position of the first-type grooves 611 and/or the protrusions 621 and the corresponding third openings 510 is different from the relative position of the second-type grooves 612 and/or the protrusions 622 and the corresponding third openings 510, the area ratio of the first-type grooves 611 and/or the protrusions 621 in the corresponding third openings 210 is different from the area ratio of the second-type grooves 612 and/or the protrusions 622 in the corresponding third openings 510, the number of the first-type grooves 611 and/or the protrusions 621 in the corresponding third openings 510 is different from the number of the second-type grooves 612 and/or the protrusions 622 in the corresponding third openings 510, and the shapes of the first-type grooves 611 and/or the protrusions 621 are different from the shapes of the second-type grooves 612 and/or the protrusions 622. With such an arrangement, the grooves 61 and/or the protrusions 62 can be distributed more randomly in the third openings 510 corresponding to different sub-pixels having the same color, and the first type of grooves 611 and/or the protrusions 621 and the second type of grooves 612 and/or the protrusions 622 which are randomly arranged can further change the distribution of the diffraction angles of the reflected light of the original single periodic array, so that the diffraction angles of the reflected ambient light emitted from the display panel can be more continuous, and the color separation phenomenon can be avoided. Optionally, the first color sub-pixel may be any one of a red sub-pixel, a green sub-pixel, and a blue sub-pixel.
As shown in fig. 9 and 10, fig. 9 is an enlarged schematic view of a partial region of another display panel according to an embodiment of the present invention, and fig. 10 is a schematic cross-sectional view taken along a1-a2 in fig. 9, the grooves are indicated by dotted lines, the protrusions are indicated by solid lines, and the area ratios of the first type grooves 611 and/or protrusions 621 and the second type grooves 612 and/or protrusions 622 in the respective corresponding third openings 510 are different. The areas of the first type of recess 611 and/or protrusion 621 and the second type of recess 612 and/or protrusion 622 refer to the area of the orthogonal projection of the corresponding structure on the plane where the filter layer 5 is located. In fig. 9 and 10, it is illustrated that the area ratio of the first-type recesses 611 and the protrusions 621 in the corresponding third openings 510 is small, and the area ratio of the second-type recesses 612 and the protrusions 622 in the corresponding third openings 510 is large. As shown in fig. 9 and 10, in the embodiment of the present invention, the areas of the third openings 510 corresponding to the first type of grooves 611 and the protrusions 621 are the same as the areas of the third openings 510 corresponding to the second type of grooves 612 and the protrusions 622, and the orthogonal projection areas of the first type of grooves 611 and the protrusions 621 on the plane where the filter layer 5 is located are different from the orthogonal projection areas of the second type of grooves 612 and the protrusions 622 on the plane where the filter layer 5 is located.
Alternatively, as shown in fig. 9, in the embodiment of the present invention, the number of the first type recesses 611 and the protrusions 621 in the corresponding third openings 510 is the same as the number of the second type recesses 612 and the protrusions 622 in the corresponding third openings 510, and the area of a single first type recess 611 and protrusion 621 is different from the area of a single second type recess 612 and protrusion 622.
It should be noted that, in fig. 9, the shape of the orthographic projection of the first-type groove 611 and the projection 621, and the second-type groove 612 and the projection 622 is set to be a ring shape, which is only an illustration, and the shape may also be set to be other shapes including a discrete pattern in the embodiment of the present invention, and the embodiment of the present invention does not limit this.
Alternatively, as shown in fig. 11, fig. 11 is a schematic cross-sectional view of another display panel provided in the embodiment of the present invention, and in the embodiment of the present invention, the numbers of the first type groove 611 and/or the protrusion 621 and the second type groove 612 and/or the protrusion 622 in the corresponding third openings 510 may also be set to be different.
Alternatively, as shown in fig. 12, fig. 12 is an enlarged schematic view of a partial area of another display panel provided in the embodiment of the present invention, the numbers of the first type of groove 611 and/or the protrusion 621 and the second type of groove 612 and/or the protrusion 622 in the respective corresponding third openings 510 may be set to be different, and the area ratios of the first type of groove 611 and/or the protrusion 621 and the second type of groove 612 and/or the protrusion 622 in the respective corresponding third openings 510 are set to be the same.
Alternatively, as shown in fig. 13, fig. 13 is an enlarged schematic view of a partial area of another display panel provided in the embodiment of the present invention, the area ratio of the first type of groove 611 and/or the protrusion 621 and the second type of groove 612 and/or the protrusion 622 in the corresponding third opening 510 may be set to be the same, and the number of the first type of groove 611 and/or the protrusion 621 and the second type of groove 612 and/or the protrusion 622 is set to be the same; and the positions of the first type recesses 611 and/or protrusions 621 in their corresponding third openings 510 are made different from the positions of the second type recesses 612 and/or protrusions 622 in their corresponding third openings 510.
As shown in fig. 14, fig. 14 is a schematic view of a display device according to an embodiment of the present invention, where the display device includes the display panel 100. The specific structure of the display panel 100 has been described in detail in the above embodiments, and is not described herein again. Of course, the display device shown in fig. 14 is only a schematic illustration, and the display device may be any electronic device with a display function, such as a mobile phone, a tablet computer, a notebook computer, an electronic book, or a television.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (17)
1. A display panel, comprising:
a substrate;
a display layer on one side of the substrate; the display layer comprises a pixel defining layer and a light emitting layer, the pixel defining layer comprises a first opening, and the light emitting layer is positioned in the first opening;
the light extraction layer is arranged corresponding to the light emitting layer and is positioned on one side, far away from the substrate, of the display layer; the light extraction layer comprises a first light extraction unit and a second light extraction unit, the second light extraction unit is positioned on one side of the first light extraction unit, which is far away from the substrate, and the refractive indexes of the first light extraction unit and the second light extraction unit are different;
the first light extraction unit includes a first subsection and a second subsection, and a shortest distance d between the second subsection and the first subsection satisfies:
wherein L is2The length direction of the first opening is parallel to the plane of the display panel; h is1The height of the first subsection is the height direction of the first subsection, and the height direction of the first subsection is parallel to the light emitting direction of the display panel; h is2The distance between the bottom surface of the first subsection and the bottom surface of the light-emitting layer is defined as the surface of the first subsection close to the substrate, and the bottom surface of the light-emitting layer is the surface of the light-emitting layer close to the substrate.
2. The display panel according to claim 1,
the first section includes a first side; the angle alpha between the first side face and the bottom face of the first subsection1Satisfies the following conditions: alpha is more than 01Not more than 90 degrees; the first side face is used for converting at least part of high-angle light emitted by the light emitting layer into low-angle light.
3. The display panel according to claim 1,
the first light extraction unit comprises at least one second subsection, and the total area of orthographic projection of the second subsection on the plane of the light extraction layer is S1;
the first section includes a second opening, the second section being located within the second opening; the total area of the second openings is S2,
4. the display panel according to claim 1,
the display panel includes a plurality of repeatedly arranged minimum repeating units including the first light extraction unit;
in the minimal repeating unit, an area of an orthographic projection of the second subsection on a plane in which the light extraction layer is located is S01, an area of the second opening is S02,
5. the display panel according to claim 1,
the height of the second branch is less than or equal to 2 mu m, and the height direction of the second branch is parallel to the light emergent direction of the display panel.
6. The display panel of claim 1, wherein the display panel comprises a plurality of first color sub-pixels; the second sub-pixel corresponding to the first color sub-pixel at least comprises a first type sub-pixel and a second type sub-pixel which are arranged in a distinguishing way.
7. The display panel according to claim 6,
the first-type branches and the second-type branches have different area ratios in the second openings.
8. The display panel according to claim 6,
the first type of subsection and the second type of subsection differ in a number of the respective corresponding second openings.
9. The display panel according to claim 6,
the first type of branch and the second type of branch have the same area ratio in the corresponding second openings, and the number of the first type of branch and the second type of branch in the corresponding second openings is different.
10. The display panel according to claim 6,
the first type of branch and the second type of branch have the same area ratio in the corresponding second openings, and the number of the first type of branch and the number of the second type of branch are the same;
the position of the first type of subsection within its corresponding second opening is different from the position of the second type of subsection within its corresponding second opening.
11. The display panel according to claim 1,
the display panel further comprises a filter layer comprising a black matrix located between the display layer and the light extraction layer; the black matrix includes a third opening;
the first sub-portion comprises a groove and/or a protrusion, and an orthographic projection of the groove and/or the protrusion on a plane where the filter layer is located is at least partially located in the third opening.
12. The display panel according to claim 11,
the display panel comprises a plurality of first color sub-pixels; the grooves and/or the bulges corresponding to the first color sub-pixels at least comprise a first type of grooves and/or bulges and a second type of grooves and/or bulges which are arranged in a distinguishing way.
13. The display panel according to claim 12,
the area occupation ratio of the first type of grooves and/or bulges and the second type of grooves and/or bulges in the corresponding third openings is different.
14. The display panel according to claim 12,
the first type of grooves and/or projections and the second type of grooves and/or projections are different in number in the corresponding third openings.
15. The display panel according to claim 12,
the first type of grooves and/or projections and the second type of grooves and/or projections are different in number in the corresponding third openings, and the area occupation ratios of the first type of grooves and/or projections and the second type of grooves and/or projections in the corresponding third openings are the same.
16. The display panel according to claim 12,
the area occupation ratios of the first type of grooves and/or the second type of protrusions in the corresponding third openings are the same, and the numbers of the first type of grooves and/or the second type of protrusions in the corresponding third openings are the same;
the positions of the first type of grooves and/or projections in the third openings corresponding thereto are different from the positions of the second type of grooves and/or projections in the third openings corresponding thereto.
17. A display device characterized by comprising the display panel according to any one of claims 1 to 16.
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| CN202111653027.7A CN114335389B (en) | 2021-12-30 | 2021-12-30 | Display panel and display device |
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| CN202111653027.7A CN114335389B (en) | 2021-12-30 | 2021-12-30 | Display panel and display device |
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| CN114335389B CN114335389B (en) | 2024-01-26 |
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