This application claims priority to Chinese Patent Application No. 202111678514.9, filed on Dec. 31, 2021, which is hereby incorporated by reference in its entirety.
The present application relates to the field of display technology, and in particular to a display panel and a display apparatus.
An organic light-emitting display (OLED) is used in an organic light-emitting display apparatus as a light-emitting element, which has the property of self-luminescence and does not need to be additionally provided with a light source, so that it facilitates the overall slimness of the display apparatus and enables the fabrication of a flexible display screen. In addition, organic self-luminescence display technology has the properties of fast response and wide viewing angle, so that it has become the focus of current research.
In current display panels, as the integration degree of the panels becomes higher and higher, the number of film layers over the light-emitting material layer gradually increases, and the increase of the number of the film layers leads to an increase in light loss between the film layers and a decrease in light emitting efficiency. Therefore, there is an urgent need for an organic light-emitting display device that can improve light emitting efficiency.
Embodiments of the present application provide a display panel and a display apparatus to solve the problem of low light emitting efficiency of the display panels in the prior art and to improve the quality of the display panels.
The embodiments of the present application provide a display panel including:
a substrate;
a pixel definition layer located on a side of the substrate and comprising a plurality of pixel openings arranged in an array, a projection of each of the pixel openings on the substrate comprising a first side edge;
a plurality of light-emitting units each corresponding to one of the pixel openings, and each located in the corresponding one of the pixel openings;
a first dimming layer located on a side of the pixel definition layer away from the substrate, the first dimming layer comprising a plurality of dimming openings each corresponding to one of the pixel openings;
a second dimming layer located on a surface of a side of the first dimming layer away from the substrate, a refractive index of the second dimming layer being greater than a refractive index of the first dimming layer;
a projection of each of the dimmer openings on the substrate comprising a body portion and at least one first protrusion connected to the body portion, and in a plane of the projection, the first protrusion being at least partially located on a side of a first side edge of a pixel opening corresponding to the dimmer opening that is away from a center of the dimmer opening.
In some embodiments, the display panel further includes a color film layer on a side of the light-emitting element away from the substrate; the color film layer includes a plurality of filtering units and a shading portion, where the shading part defines a plurality of first openings, and a projection of the filtering unit on the plane where the shading part is located covers the first opening; in a light-emitting direction of the display panel, the first opening overlaps the light-emitting element, and the projection of the metal portion on the color film layer covers the first opening.
The application also provides a display apparatus including a display panel according to any of the embodiments of the application.
The display panel and the display apparatus according to the present application have the following advantageous effects:
The dimming opening in the display panel has a body portion and at least one first protrusion connected to the body portion. Therefore, during the fabrication of the display panel, the alignment deviation between the mask plate and the substrate will be partially offset by the first protrusion. Finally, after the alignment deviation occurs, the dimming opening of the first dimming layer can reduce the effect of process fluctuation on the light efficiency, thereby solving the problem of the optical difference in viewing angles in different directions occurring in the display panel, improving the light extraction effect the display panel, and ensuring good display effect of the display panel.
In order to explain the embodiments of the present application or the technical solutions in the prior art more clearly, a brief introduction will be given below to the accompanying drawings which are used in the description of the embodiments or the prior art. It is obvious that the drawings in the description below are some embodiments of the present application, and it would have been obvious for a person skilled in the art to obtain other drawings according to these drawings without involving any inventive effort.
The embodiments of the present application will now be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the application are shown. Based on the embodiments of the present application, all other embodiments obtained by a person skilled in the art without inventive effort fall within the scope of protection of the present application.
The terminology used in the examples of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the embodiments of the application 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.
A plurality of light-emitting units 3′ are corresponding to the pixel openings 21′. The light-emitting units 3′ is located in the pixel opening 21′. The light-emitting units 3′ may be light-emitting units that each can emit light of a different color. For example, the light-emitting units 3′ may include a red light-emitting unit that can emit red light, a green light-emitting unit that can emit green light, and a blue light-emitting unit that can emit blue light. For example, as shown in
The display panel 000 further includes a first dimming layer 4′. The first dimming layer 4′ is located on a side of the pixel definition layer 2′ that is away from the substrate 1′. The first dimming layer 4′ includes a plurality of dimming openings 41′. As shown in
The display panel 000 further includes a second dimming layer 5′. The second dimming layer 5′ is located on a surface of a side of the first dimming layer 4′ that is away from the substrate 1′. The second dimming layer 5′ completely fills the dimming opening 41′. A refractive index n1 of the first dimming layer 4′ is less than a refractive index n2 of the second dimming layer 5′, so that a light ray emitted at a large angle by the light-emitting unit 3′, after being refracted or reflected by the first dimming layer 4′, continues to exit through the second dimming layer 5′ at a small angle, thereby improving the light efficiency of the front surface of the display panel.
However, during the manufacturing process of the display panel, the alignment deviation of the mask plate and the randomness during the process may lead to dislocation between the light opening 41″ and the pixel opening 21″ in the finally formed display panel, as shown in
The display panel 100 further includes a first dimming layer 4 located on a side of the pixel definition layer 2 that is away from the substrate 1. The first dimming layer 4 includes a plurality of dimming openings 41. The dimming opening 41 is corresponding to the pixel opening 21. In an optional implementation, the dimming openings 41 are in one-to-one correspondence with the pixel opening 21. In another optional implementation, the dimming openings 41 are not in one-to-one correspondence with the pixel opening 21.
Generally, the dimming opening 41 at least partly overlaps the light-emitting unit 3 in the light-emitting direction. In this case, the first dimming layer 4 is generally a film layer with a low-refractive index. When the first dimming layer 4 is a film layer with a high refractive index, the dimming opening 41 may also be located directly above the pixel defining layer 2, as shown in
The display panel 100 further includes a second dimming layer 5. The second dimming layer 5 is located on a surface of a side of the first dimming layer 4 that is away from the substrate 1. The second dimming layer 5 completely fills the dimming opening 41. A refractive index n1 of the first dimming layer 4 is less than a refractive index n2 of the second dimming layer 5, so that a light ray emitted at a large angle by the light-emitting unit 3, after being refracted or reflected by the first dimming layer 4, continues to exit through the second dimming layer 5 at a small angle, thereby improving the light efficiency of the front surface of the display panel.
As shown in
By providing the body portion 411 and the at least one first protrusion 412 connected to the body portion 411 in the dimming opening 41 in the display panel, during the fabrication of the display panel, the alignment deviation between the mask plate and the substrate will be partially offset by the first protrusion 412. As shown in
In an implementation of the present application, the projections of the body portion 411 and its corresponding pixel opening on the substrate are similar patterns. The specific shape of the body portion is not limited herein. In
In an implementation of the present application, an area of the body portion 411 is greater than or equal to an area of the projection of the pixel opening on the substrate. In a case where the area of the body portion 411 is equal to the area of the projection of the pixel opening on the substrate, when the dimming opening is offset, the amount of redundancy in the deviation direction is reduced due to the presence of the first protrusion 412, so that the brightness difference in different orientations of the pixel when the offset occurs can be effectively contained. However, the actual situation is often not so ideal, in order to ensure a enough coverage by the dimming opening as possible, the area of the body portion 411 is generally set to be slightly larger than the area of the projection of the pixel opening on the substrate.
In an implementation of the present application, as shown in
In an implementation of the present application, as shown in
In an implementation of the present application, as shown in
However, the second edge 4122 of the first protrusion 412 may not be exactly perpendicular to the first side edge E1, or approximately perpendicular to the first side edge E1, due to the limitations of prior fabrication processes. In an implementation of the present application, as shown in
In an implementation of the present application, as shown in
Further, in the first direction X, the body portions 411 corresponding to the adjacent two of the first light-emitting units 31 are symmetrical with respect to a second symmetry axis A′. The first protrusions 412 corresponding to the adjacent two of the first light-emitting units 31 are also symmetrical with respect to the second symmetry axis A′ (the corresponding implementation is not shown in the figures).
Since the deviation directions generated by the dimming openings 41 on the whole display panel 100 are the same, when the first protrusions 412 are at a same position, the positions where the light efficiency is improved (the positions of the first protrusions 412 relative to the corresponding pixel openings 21) are different, resulting in different intensities of exit light of a single pixel. With regard to an RGB panel, the shapes and sizes of sub-pixels of different colors are often different, and therefore the same offset amount may result in that the brightness difference of light-emitting units of different colors is more obvious, thereby bringing about a display color offset. Therefore, since the positions of the first protrusions 412 relative to the body portions 411 in the adjacent two of the first light-emitting units 31 are different, the brightness self-adaptation of light-emitting units of the same color can be achieved in the case where the deviation direction is not controllable, thereby reducing the brightness difference between light-emitting units of different colors, balancing the overall compensation effect of the display panel, and avoiding the color offset brought about by the randomness of the deviation direction.
In an implementation of the present application, as shown in
In the process of preparing the display panel, the factors causing alignment deviation between a mask plate and a substrate are complicated. The deviation direction of the alignment deviation may be different under different conditions. If only one side edge is provided with the protrusion, when the deviation direction is exactly opposite to the expected direction, the protrusion cannot effectively improve the improvement of light efficiency. Therefore, the inventors consider providing a second protrusion 413 on the opposite side to the first protrusion, so as to adapt to more deviation directions. The improvement in light efficiency on at least some parts of the second side edge E2 (the thickened parts) can be ensured due to the second protrusion 413, so that the influence of process fluctuation on the light efficiency of the display panel can be reduced, the light extraction effect of the display panel can be improved, and the good display effect of the display panel can be ensured.
In an implementation of the present application, as shown in
In an implementation of the present application, as shown in
Similary to the arrangement of the first protrusion 412, in the plane of the projection, the second protrusion 413 includes a fourth edge 4132 perpendicular to the second side edge E2. In the actual fabrication, in consideration of the process fluctuation, if the angle between the fourth edge 4132 and the second side edge E2 vary within 90°±5°, the fourth edge 4132 can be considered to be perpendicular or approximately perpendicular to the second side edge E2.
The fourth edge 4132 of the second protrusion 413 may not be exactly perpendicular to the second side edge E2, or approximately perpendicular to the second side edge E2, due to the limitations of existing manufacturing processes. In an implementation of the present application, the second protrusion 413 includes a fourth edge 4132 intersecting the second side edge E2 in the plane of the projection. At least one of the fourth edges 4132 makes an angle of less than 90° with the second side edge E2.
In an implementation of the present application, as shown in
In an implementation of the present application, as shown in
Since the deviation directions generated by the dimming openings 41 on the whole display panel 100 are the same, when the first protrusions 412 and the second protrusions 413 are at same positions, the positions where the light efficiency is improved (the positions of the first protrusions 412 and the second protrusions 413 relative to the corresponding pixel openings 21) are different, resulting in different intensities of exit light of a single pixel. With regard to an RGB panel, the shapes and sizes of sub-pixels of different colors are often different, and therefore the same offset amount may result in that the brightness difference of light-emitting units of different colors is more obvious, thereby bringing about a display color offset. Therefore, since the positions of the first protrusions 412 relative to the body portions 411 in the adjacent two of the first light-emitting units 31 are different (where the first protrusion 412 corresponding to one of the adjacent two of the first light-emitting units 31 and the second protrusion 413 corresponding to the other of the adjacent two of the first light-emitting units 31 are symmetric with respect to the third symmetry axis B), the brightness self-adaptation of light-emitting units of the same color can be achieved in the case where the deviation direction is not controllable, thereby reducing the brightness difference between light-emitting units of different colors, balancing the overall compensation effect of the display panel, and avoiding the color offset brought about by the randomness of the deviation direction.
In an implementation of the present application, as shown in
The projection of the dimming opening 41 on the substrate further includes at least one third protrusion 414. In the plane of the projection, the third protrusion 414 is located at least partly on a side of the third side edge E3 that is away from the center C of the dimming opening 41.
In the process of preparing the display panel, the factors causing alignment deviation between a mask plate and a substrate are complicated. The deviation direction of the alignment deviation may be different under different conditions. If only one side edge is provided with the protrusion, when the deviation direction is exactly opposite to the expected direction, the protrusion cannot effectively improve the light efficiency. Therefore, the inventors consider providing the third protrusion 414 on the opposite side to the first protrusion, so as to adapt to more deviation directions. The improvement in light efficiency on at least some parts of the third side edge E3 (the thickened parts) can be ensured due to the third protrusion 414, so that the influence of process fluctuation on the light efficiency of the display panel can be reduced, the light extraction effect of the display panel can be improved, and the good display effect of the display panel can be ensured.
Similarly, as shown in
In an implementation of the present application, as shown in
Embodiments of the present application further provide a display apparatus.
While the present application has been described connection with what is presently considered to be the most practical and preferred embodiments, it is to be understood that the application is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Finally, it should be noted that, the above-mentioned embodiments are merely illustrative of the technical solution of the present application, and do not limit same; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that: the technical solutions disclosed in the above-mentioned embodiments can still be modified or some or all of the technical features can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present application.
Number | Date | Country | Kind |
---|---|---|---|
202111678514.9 | Dec 2021 | CN | national |