CN119012860A

CN119012860A - Display panel, display screen and display device

Info

Publication number: CN119012860A
Application number: CN202411104168.7A
Authority: CN
Inventors: 余珺; 崔志佳
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2024-08-12
Filing date: 2024-08-12
Publication date: 2024-11-22

Abstract

The embodiment of the application relates to a display panel, a display screen and display equipment, wherein the display panel comprises: a substrate; the light-emitting layer is positioned on the surface of the substrate and is provided with a plurality of sub-pixels; the light path adjusting layer is positioned on one side of the light emitting layer far away from the substrate, the light path adjusting layer is provided with a plurality of light adjusting units, the light adjusting units are respectively and correspondingly arranged with the plurality of sub-pixels, the light adjusting units are used for adjusting light beams emitted by the corresponding sub-pixels, so that the included angle between the light beams emitted to one side of the light path adjusting layer far away from the light emitting layer and the target direction is smaller than the included angle between the light beams incident from the sub-pixels and the target direction, and the target direction is perpendicular to the display surface of the display panel; the light emitting areas of the plurality of sub-pixels are not identical, and the light emitting areas of the sub-pixels are positively correlated with the sizes of the corresponding dimming units.

Description

Display panel, display screen and display device

Technical Field

The embodiment of the application relates to the technical field of display, in particular to a display panel, a display screen and display equipment.

Background

Along with the continuous development of display technology, the requirements of people on display panels are also continuously improved. For example, it is desirable that the display panel has high brightness so as to be convenient for use in a high illumination environment. However, the brightness of the current display panel cannot meet the use requirements of users.

Disclosure of Invention

Based on this, it is necessary to provide a display panel, a display screen, and a display device with high brightness in view of the above-described technical problems.

In a first aspect, the present application provides a display panel comprising:

A substrate;

the light-emitting layer is positioned on the substrate and is provided with a plurality of sub-pixels;

The light path adjusting layer is positioned on one side of the light-emitting layer, which is far away from the substrate, and is provided with a plurality of light adjusting units, the light adjusting units are respectively and correspondingly arranged with the sub-pixels, and the light adjusting units are used for adjusting light beams emitted by the corresponding sub-pixels so that the included angle between the light beams emitted to one side of the light path adjusting layer, which is far away from the light-emitting layer, and the target direction is smaller than the included angle between the incident light beams and the target direction, and the target direction is perpendicular to the display surface of the display panel;

The light emitting areas of the plurality of sub-pixels are not completely the same, and the light emitting areas of the sub-pixels are positively correlated with the sizes of the corresponding dimming units.

In a second aspect, the present application provides a display screen comprising:

a display panel as described above;

And the cover plate is positioned on the light emitting side of the display panel and covers the display panel.

In a third aspect, the present application provides a display device comprising a display screen as described above.

According to the display panel, the display screen and the display device, the luminous areas of the sub-pixels are not identical, and the current density of different sub-pixels can be adaptively changed according to the unified brightness requirement, so that the service life of the sub-pixels is prolonged in a mode of reducing the current density, the brightness attenuation of the sub-pixels with one or more colors along with long-time use is reduced, and the color cast of the display panel after long-time use is further reduced. In addition, through setting up the light path adjustment layer, can adjust the light beam that each unit of adjusting luminance in the light path adjustment layer sent corresponding sub-pixel respectively to make the outgoing extremely the light beam that light path adjustment layer deviates from luminescent layer one side is less with the contained angle of target direction, promptly, makes the light beam can more follow display panel's little visual angle outgoing. In addition, the embodiment of the application determines the size of the corresponding dimming unit based on the light emitting area of the sub-pixel, so that the sub-pixel with larger light emitting area corresponds to the dimming unit with larger size, and the light beam emitted by the sub-pixel can be incident to the corresponding dimming unit in a larger proportion and emergent from the small view angle range, thereby further improving the light emitting efficiency of the whole display panel in the small view angle range, enabling the display device to have higher brightness in the small view angle range and reducing the power consumption of the display panel.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.

FIG. 1 is a schematic diagram of a film structure of a display panel according to an embodiment;

FIG. 2 is a second schematic diagram of a film structure of a display panel according to an embodiment;

FIG. 3 is a third schematic diagram of a film structure of a display panel according to an embodiment;

FIG. 4 is a schematic diagram of a film structure of a display panel according to an embodiment;

FIG. 5 is a schematic diagram of a film structure of a display panel according to an embodiment;

Fig. 6 is an internal structural diagram of a display device of an embodiment.

Description of element numbers:

A substrate: 100; PI layer: 110; buffer layer: 120; passivation layer: 130; light emitting layer: 200; light emitting device layer: 210; sub-pixels: 211; red subpixels: 211a; green sub-pixel: 211b; blue sub-pixel: 211c; sub-pixel group: 2111; pixel definition layer: 212; and (2) packaging layer: 220; optical path adjusting layer: 300; dimming unit: 310; high folding part: 311; low fold: 312; a filter layer: 400; a light filtering part: 410; light shielding portion: 420; touch layer: 500; first sub-touch layer: 510; a second sub-touch layer: 520; optical adhesive layer: 610; cover plate: 620; polyester film: 630.

Detailed Description

In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. Embodiments of the application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

It will be understood that when an element or layer is referred to as being "on," "adjacent," "connected to," or "coupled to" another element or layer, it can be directly on, adjacent, connected, or coupled to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" another element or layer, there are no intervening elements or layers present. It will be understood that, although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers, doping types and/or sections, these elements, components, regions, layers, doping types and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer, doping type or section from another element, component, region, layer, doping type or section. Thus, a first element, component, region, layer, doping type or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present invention.

Spatially relative terms, such as "under", "below", "beneath", "under", "above", "over" and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use and operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "under" or "beneath" other elements would then be oriented "on" the other elements or features. Thus, the exemplary terms "below" and "under" may include both an upper and a lower orientation. Furthermore, the device may also include an additional orientation (e.g., rotated 90 degrees or other orientations) and the spatial descriptors used herein interpreted accordingly.

As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," and/or the like, specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof. Also, in this specification, the term "and/or" includes any and all combinations of the associated listed items.

Embodiments of the invention are described herein with reference to cross-sectional illustrations that are schematic illustrations of idealized embodiments (and intermediate structures) of the invention, such that variations of the illustrated shapes due to, for example, manufacturing techniques and/or tolerances are to be expected. Thus, embodiments of the present invention should not be limited to the particular shapes of the regions illustrated herein, but rather include deviations in shapes that result, for example, from manufacturing techniques. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the actual shape of a region of a device and are not intended to limit the scope of the invention.

An embodiment of the present application provides a display panel, fig. 1 is a schematic diagram of a film structure of the display panel according to an embodiment, and referring to fig. 1, the display panel includes a substrate 100, a light emitting layer 200 and a light path adjusting layer 300.

The substrate 100 of the display panel may include, but is not limited to, a hard substrate such as quartz glass or alumina glass, and a flexible substrate such as Polyimide (PI) film or polyester (Polyethylene terephthalate, PET) film. For example, the substrate 100 of the display panel may include a PI layer 110, a buffer layer 120, and a passivation layer 130 stacked in this order. The Buffer layer 120 (Buffer) is used to protect the PI layer 110 from physical and chemical damage, and to Buffer stress of the flexible display panel during bending and folding, so as to avoid fatigue or fracture of the substrate 100 caused by stress concentration. The passivation layer 130 (Passivation Layer, PLN) serves to block water and oxygen, and has high hardness and abrasion resistance, and can protect the display panel from scratch and impact during normal use.

The light emitting layer 200 is disposed on the surface of the substrate 100, and the light emitting layer 200 may specifically include a light emitting device layer 210 and an encapsulation layer 220 stacked in sequence. Wherein the encapsulation layer 220 may be a thin film encapsulation (Thin Film Encapsulation, TFE) layer, the thin film encapsulation is suitable for a display panel including a flexible substrate. The encapsulation film may include an inorganic film and an organic film alternately stacked to prevent external contaminants from entering, thereby protecting the light emitting material from moisture and oxygen. The light emitting device layer 210 in the light emitting layer 200 is provided with a plurality of sub-pixels 211, and the plurality of sub-pixels 211 may be arranged in an array. It is understood that a driving circuit layer may be further disposed between the light emitting layer 200 and the substrate, and the driving circuit layer is used for driving each sub-pixel 211 to emit light.

In particular, the subpixel 211 may include any one of a Liquid crystal display device (Liquid CRYSTAL DISPLAY, LCD), a plasma display device (PLASMA DISPLAY), an Organic LIGHT EMITTING Diode (OLED), an electrophoretic display device (Electro-Phoretic, EPD), or an electrochromic display device (Electro-Chromic Display, ECD), etc. Wherein the colors corresponding to the plurality of sub-pixels 211 are not identical. For example, the plurality of sub-pixels 211 may include a plurality of red sub-pixels, a plurality of green sub-pixels, and a plurality of blue sub-pixels, so that different colors are displayed by the mixed colors of the plurality of color sub-pixels 211. It is understood that in other embodiments, the plurality of sub-pixels 211 are not limited to the above-described red sub-pixel, green sub-pixel, and blue sub-pixel, and may include a white sub-pixel 211, a yellow sub-pixel 211, and the like.

Further, the light emitting areas of the plurality of sub-pixels 211 are not completely the same, and specifically, the light emitting areas of the sub-pixels 211 with different colors may be different. For example, the luminescent material of the blue subpixel needs to operate at high energy, resulting in a faster decay rate of the luminescent material of the blue subpixel and, correspondingly, a lower lifetime of the blue subpixel. Therefore, the light emitting area of the blue sub-pixel can be increased, namely the aperture ratio of the blue sub-pixel is enlarged, so that the required brightness can be realized with lower current density, and the attenuation speed of the blue sub-pixel is slowed down. Similarly, the light emitting area of the green sub-pixel may be designed to be minimum, and the light emitting area of the red sub-pixel may be set to be intermediate between the blue sub-pixel and the green sub-pixel. Still further, the shape and light emitting area of each subpixel 211 may be defined by a pixel definition layer 212 (Pixel Definition Layer, PDL) to ensure that each subpixel 211 works properly. Taking an OLED as an example, the pixel defining layer 212 may be provided with a plurality of openings, each opening of the pixel defining layer 212 is filled with a light emitting material, and the light emitting materials of the sub-pixels 211 with different colors are separated by the pixel defining layer 212, so as to form the sub-pixels 211 with different colors. The shape of the opening of the pixel defining layer 212 may be, but is not limited to, any one of a circle, an ellipse, a square, a rectangle, a polygon, a diamond, etc., which is not limited herein.

The light path adjusting layer 300 is located at a side of the light emitting layer 200 away from the substrate 100. Specifically, the light path adjusting layer 300 may be disposed on a surface of the light emitting layer 200 away from the substrate 100, and may have other film layers disposed between the light emitting layer 200, which is not limited herein. The light path adjusting layer 300 is provided with a plurality of light adjusting units 310, which is shown as a dashed box in fig. 1, and the plurality of light adjusting units 310 are respectively disposed corresponding to the plurality of sub-pixels 211. Specifically, the optical path adjusting layer 300 may include a microlens array (Micro LENS ARRAY, MLA), and the shape of the microlens may be any one of an ellipsoid, a hemisphere, a wedge, a prism, etc., and the embodiment is not limited, and one dimming unit 310 may include one or more microlenses of the microlens array. The dimming unit 310 is configured to adjust the light beam emitted by the corresponding sub-pixel 211, so that an included angle between the light beam emitted to the side of the light path adjusting layer 300 away from the light emitting layer 200 and the target direction is smaller than an included angle between the light beam incident from the sub-pixel 211 and the target direction. The target direction is perpendicular to the display surface of the display panel, so that as many light beams emitted by the sub-pixels 211 as possible emerge from a small viewing angle of the display panel, thereby improving the light-emitting efficiency of the display panel in a small viewing angle range, especially in a positive viewing angle range. On the premise of effectively improving the light emitting efficiency in a small visual angle range, the display panel can achieve the required brightness with a small driving current, so that the power consumption of the display panel is reduced by about 25% -50%. Further, the dimming unit 310 mainly affects the light beam incident in a small viewing angle range, which may be 0 ° to 30 °, with the target direction, limited by the size of the dimming unit 310.

Further, the light emitting area of the sub-pixel 211 is positively correlated with the size of the corresponding dimming cell 310. It should be noted that, herein, the size of the dimming unit 310 refers to the size of the orthographic projection of the dimming unit on the substrate. That is, the light emitting area of the sub-pixel 211 is positively correlated with the area of the orthographic projection of the corresponding dimming cell 310 on the substrate. Moreover, the size of each dimming unit 310 is larger than the size of the corresponding sub-pixel 211, so as to reduce light leakage from a large viewing angle. The size of the dimming unit 310 may be understood as a projected area of the front projection of the dimming unit 310 on the substrate 100, or as a size of the dimming unit 310 in a plane parallel to the display surface. Specifically, for the sub-pixels 211 with different light emitting areas, if the light path adjustment is performed by using the dimming units 310 with the same size, a part of the light beams emitted from the edges of the sub-pixels 211 with larger light emitting areas may directly exit from the large viewing angle, and may not be incident to the corresponding dimming units 310. For example, if a part of the light beam emitted from the edge of the blue sub-pixel directly exits from the large viewing angle, the light emission from the large viewing angle of the blue sub-pixel is relatively large, and accordingly, the light emission from the small viewing angle is relatively small. Wherein the large viewing angle range may be 30 ° to 80 °. Since a user typically views the display panel from a small viewing angle, if a large amount of light is emitted from a large viewing angle range, the light beam emitted from the blue sub-pixel is not utilized enough. Accordingly, a larger driving current is required to be supplied to the blue sub-pixel to achieve the desired brightness for the light output in the small viewing angle range. Therefore, by setting the dimming units 310 with corresponding sizes based on the light emitting areas of the sub-pixels 211, the light beams emitted by the sub-pixels 211 can be incident to the corresponding dimming units 310 as much as possible, so that each sub-pixel 211 has better light emitting efficiency in a small viewing angle range under the cooperation of the dimming units 310. It is understood that the size of the dimming unit 310 may also be related to other factors, such as the emission wavelength of the sub-pixel 211. Accordingly, the size of the dimming unit 310 may be determined by a plurality of factors in common, not just the light emitting area of the sub-pixel 211. Before determining the sizes of the dimming units 310, the small-view character bias of the display panels with the same sizes of the dimming units 310 may be detected, and the sizes of the dimming units 310 may be comprehensively determined according to the detection results.

In the embodiment of the application, by setting the light emitting areas of the sub-pixels 211 to be not identical, the current density of different sub-pixels 211 can be adaptively changed according to the uniform brightness requirement, so that the service life of the sub-pixels 211 is prolonged by reducing the current density, and the brightness attenuation of the sub-pixels 211 with one or more colors along with long-time use is reduced, so that the color shift of the display panel after long-time use is reduced. In addition, by providing the light path adjusting layer 300, the light beams emitted by the corresponding sub-pixels 211 can be adjusted by the dimming units 310 in the light path adjusting layer 300, so that the included angle between the light beam emitted to the side of the light path adjusting layer 300 facing away from the light emitting layer 200 and the target direction is smaller, that is, the light beam can be emitted from a small viewing angle of the display panel more. In addition, the size of the corresponding dimming unit 310 is determined based on the light emitting area of the sub-pixel 211, so that the sub-pixel 211 with a larger light emitting area corresponds to the dimming unit 310 with a larger size, and the light beam emitted by the sub-pixel 211 can be incident into the corresponding dimming unit 310 in a larger proportion and emergent from the small viewing angle, thereby further improving the light emitting efficiency of the whole display panel in the small viewing angle range, enabling the display device to have higher brightness in the small viewing angle range, and reducing the power consumption of the display panel.

In one embodiment, a dimming incidence area is disposed on a surface of the dimming unit 310 near the light emitting layer 200, and the dimming unit 310 is configured to adjust a light beam incident from the sub-pixel 211 through the dimming incidence area, and a first distance D between an outer contour of the dimming incidence area and an outer contour of the corresponding sub-pixel 211 is inversely related to a light emitting area of the sub-pixel 211. That is, the larger the light emitting area of the sub-pixel 211, the smaller the first distance D, which means that the smaller the size difference between the dimming unit 310 and the sub-pixel 211.

It can be understood that in the case where the light emitting area and the aperture ratio of the sub-pixel 211 are large, the light beam emitted from the sub-pixel 211 can be extracted well, thereby making the light extraction efficiency high. In the case where the light emitting area and the aperture ratio of the sub-pixel 211 are small, the light beam emitted from the light emitting material may be trapped inside the sub-pixel 211, resulting in poor light extraction efficiency. That is, when the dimming unit 310 is not provided, the light beam extraction efficiency of the different sub-pixels 211 is positively correlated with the light emitting area. If the dimming unit 310 is disposed at the same first distance D corresponding to the sub-pixels 211 having different light emitting areas, the amount of the light beam emitted in the small viewing angle range is different after passing through the dimming unit 310. For example, the light emitting area of the red subpixel 211a is larger than the light emitting area of the green subpixel 211b, so that the red subpixel 211a emits more light from a small viewing angle than the green subpixel 211b emits from a small viewing angle. After passing through the dimming cells 310 set with the same first distance D, the red light emitted at a small viewing angle is still more than the green light emitted. Thus, the display device may also exhibit a reddish color in a small viewing angle range. For example, the first distance D1 corresponding to the blue sub-pixel may be set to 3.5um, the first distance D2 corresponding to the green sub-pixel 211b may be set to 4um, and the first distance 3um corresponding to the red sub-pixel 211a may be set to reduce the situation that the display device displays red color in a small viewing angle range. Whether or not more red light than green light is evaluated based on a predetermined ratio of light emission amount contribution. For example, when the contribution of the red sub-pixel 211a to the luminance is required to be 20% and the contribution of the green sub-pixel 211b to the luminance is required to be 60% when the target white light is emitted, it can be evaluated that the emitted red light is more than the emitted green light when the contribution of the red sub-pixel 211a to the luminance is 25% and the contribution of the green sub-pixel 211b to the luminance is 55%.

In the embodiment of the application, for the sub-pixel 211 with a smaller light emitting area, due to insufficient light output, the dimming unit 310 with a larger size difference from the sub-pixel 211 may be used to improve the improvement degree of the light output efficiency of the dimming unit 310 on the light beam in the small viewing angle range, so as to increase the light output of the sub-pixel 211 and the dimming unit 310 under the combined action of the light beam in the small viewing angle range, for example, increase the light output of the green sub-pixel 211 b. Accordingly, for the sub-pixel 211 with a larger light emitting area, since the light emitting amount of the sub-pixel 211 is larger, the dimming unit 310 with a smaller size difference from the sub-pixel 211 can be used to reduce the improvement degree of the light emitting efficiency of the dimming unit 310 on the light beam in the small viewing angle range, so as to reduce the light emitting amount of the light beam in the small viewing angle range under the combined action of the sub-pixel 211 and the dimming unit 310, for example, reduce the light emitting amount of the red sub-pixel 211 a. Therefore, by adjusting the size of the dimming unit 310, the light output of the small viewing angles of different colors in the display panel can be more balanced, thereby reducing the small viewing angle bias during the display process.

With continued reference to fig. 1, the dimming unit 310 includes a high-refractive portion 311 and a low-refractive portion 312, and the refractive index of the high-refractive portion 311 is higher than that of the low-refractive portion 312. Wherein, the refractive index Ncf of the high-folded portion 311 may be in a range of 1.5 < ncf+.2, such as ncf=1.6, ncf=1.65, ncf=1.7, ncf=1.75, ncf=1.8, ncf=1.85, ncf=1.9, ncf=1.95, or ncf=2. Specifically, the high refractive portion 311 may be made by adding high refractive index particles to a main component such as photoresist (Optical Contact adhesive, OC) to have a high refractive index. The high refractive index particles may include, but are not limited to, zirconia (ZrO 2), neodymium (Nd), or the like. The refractive index Noc of the low-refractive portion 312 may be in the range of 1.3++noc < 1.5, for example noc=1.3, noc=1.35, noc=1.4, noc=1.45, or noc=1.48. The low-refraction portion 312 may be made of a material having a low refractive index such as silicon (Si), photoresist, or the like. The light beam emitted by the sub-pixel 211 is incident to the low-refraction portion 312 through the high-refraction portion 311 of the corresponding dimming unit 310, so that the included angle between the light beam emitted to the side of the light path adjusting layer 300, which is away from the light emitting layer 200, and the target direction is smaller than the included angle between the light beam incident from the sub-pixel 211 and the target direction. In the embodiment of the application, by setting the low-refraction portion 312 and the high-refraction portion 311 with different refractive indexes, the light beam emitted by the sub-pixel 211 is bent at the interface between the high-refraction portion 311 and the low-refraction portion 312, so as to change the light path thereof, and greatly convert the light beam with a large viewing angle into a small viewing angle or even a positive viewing angle, so that the light emitting efficiency of the display panel within a small viewing angle range can be effectively improved. In addition, the refractive index of the high refractive index portion 311 can be flexibly changed by means of adjusting the material, the amount of addition, and the like of the high refractive index particles based on the manner of adding the high refractive index particles, so that the feasibility is high.

With continued reference to fig. 1, in one embodiment, the high-fold portion 311 is located in a central region of the dimming unit 310, and a surface of the dimming unit 310 on a side close to the light emitting layer 200 extends to a surface of the dimming unit 310 on a side far from the light emitting layer 200. Also, the high-folded portion 311 covers a portion of the surface of the dimming unit 310 on the side near the light emitting layer 200, and exposes another portion of the surface of the dimming unit 310 on the side near the light emitting layer 200. The low folded portion 312 is located at a peripheral region of the dimming unit 310 and contacts the high folded portion 311. Alternatively, the top surface of the low-folded portion 312 may extend to the surface of the dimming unit 310 on the side away from the light emitting layer 200, or may be located between two surfaces of the dimming unit 310, which is not limited in this embodiment. The top surface of the low-folded portion 312 refers to the surface of the low-folded portion 312 on the side away from the light-emitting layer 200.

Alternatively, the interface between the high-refraction portion 311 and the low-refraction portion 312 may be a plane or an arc surface, which is not limited herein, and may be specifically set according to the requirement for converging the light beam. In the embodiment shown in fig. 1, the interface of the high fold 311 and the low fold 312 is planar. Further, the low-folded portions 312 corresponding to the two adjacent sub-pixels 211 may be connected together to improve the structural stability of the low-folded portions 312. For example, in the embodiment shown in fig. 1, the cross section of the integrated structure formed by connecting the low-refraction portions 312 corresponding to the two adjacent sub-pixels 211 may be a trapezoid, and two sides of the trapezoid are interfaces between the low-refraction portions 312 and the high-refraction portions 311, so that the light beams from the sub-pixels 211 are refracted or reflected at the interfaces, thereby realizing the adjustment of the light paths. Note that, the light emitting device such as OLED as the sub-pixel 211 is generally a uniform surface light emitting source, but in order to simplify the drawing, only one light path is shown for each color sub-pixel 211.

The included angle between the tangential plane and the display plane at each point on the interface between the high-refraction portion 311 and the low-refraction portion 312 is in the first angle range, so that at least part of the light beams from the corresponding sub-pixels 211 are totally reflected at the interface between the high-refraction portion 311 and the low-refraction portion 312. Total reflection refers to the phenomenon that when light rays are emitted from an optically dense medium to an optically sparse medium, the refracted light completely disappears and only the reflected light rays remain when the incident angle exceeds a critical angle. The optically dense medium is a medium with a high refractive index, and the optically hydrophobic medium is a medium with a low refractive index. The first angle range may be determined according to the first distance D, the film thickness between the dimming unit 310 and the sub-pixel 211, the refractive index of the high refractive portion 311, the refractive index of the low refractive portion 312, and the like. The first angle range may be 50 ° to 70 °, such as 50 °, 60 °, 70 °, etc. In particular, total reflection can change the propagation direction of a light beam to a greater extent than refraction, thereby better achieving convergence of the light beam. Moreover, by setting the tangential direction at each point on the interface, the incident angle of the light beam from the sub-pixel 211 when the light beam is incident from the high-refraction portion 311 to the low-refraction portion 312 can be accurately controlled, so as to accurately adjust the emergent direction of the light beam adjusted by the dimming unit 310, further make the light beam emergent from the small view angle of the display panel, and improve the emergent efficiency of the display panel.

With continued reference to fig. 1, in one embodiment, the display panel further includes a filter layer 400. The filter layer 400 includes a plurality of filter portions 410 and a plurality of light shielding portions 420, and the filter portions 410 and the light shielding portions 420 are alternately arranged. It can be understood that the metal electrode of the display panel may reflect external natural light, resulting in picture interference and reduced contrast. Therefore, the light shielding part 420 may be used to reduce the influence of the reflected light on the display screen, the light shielding part 420 may also be referred to as a Black Matrix (BM), the light shielding part 420 is used to shield and absorb the reflected light and the emitted light of a large viewing angle, and especially, the light beam of 70 ° or more is easily absorbed by the light shielding part 420, thereby reducing the influence of the reflected light on the screen and reducing the emitted light of the large viewing angle of the display panel.

The plurality of filter portions 410 are provided corresponding to the plurality of sub-pixels 211, respectively, and the center of projection of the filter portion 410 on the substrate 100 is aligned with the center of projection of the corresponding sub-pixel 211 on the substrate 100. In the related art, in order to reduce reflection of external natural light, a circular polarizer is generally used to block reflection of external natural light, so as to ensure contrast and clear visual effect of the display panel in a high illumination environment. However, the transmittance of the polarizer is usually only 38%, and the brightness of the display panel is greatly affected by the lower transmittance. Therefore, the color filter technology is used to replace the polarizer in the present embodiment, so that the light transmission frequency band of the filter 410 corresponds to the light emission wavelength of the corresponding sub-pixel 211, so as to block the external natural light. Illustratively, the plurality of light filtering parts 410 may include a red light filtering part 410, a green light filtering part 410, and a blue light filtering part 410, the red light filtering part 410 allowing the red light to pass therethrough, the green light filtering part 410 allowing the green light to pass therethrough, the blue light filtering part 410 allowing the blue light to pass therethrough, and fig. 1 illustrates the red light filtering part 410 and the green light filtering part 410 therein. The red sub-pixel 211a corresponds to the position of the red filtering portion 410, so that the light beam emitted by the red sub-pixel 211a can be emitted through the red filtering portion 410, the green sub-pixel 211b corresponds to the position of the green filtering portion 410, so that the light beam emitted by the green sub-pixel 211b can be emitted through the green filtering portion 410, and the blue sub-pixel corresponds to the position of the blue filtering portion 410, so that the light beam emitted by the blue sub-pixel can be emitted through the blue filtering portion 410. By making the colors of the light beams allowed to pass through the plurality of filter portions 410 identical to the colors of the light beams emitted by the corresponding sub-pixels 211, the light beams emitted by the sub-pixels 211 can not only normally pass through the filter portions 410, but also make the natural light passing through the filter portions 410 identical to the colors of the light beams emitted by the sub-pixels 211, without affecting the colors of the light beams emitted by the sub-pixels 211, so that normal light mixing can be performed.

In the embodiment of the application, by arranging the filter layer 400, the problems of image interference, contrast reduction and the like caused by the metal electrode of the display panel can be reduced, and the display panel has higher light transmittance, so that the influence on the light emitting efficiency of the display panel is lower, and the display panel with high brightness is facilitated to be provided. In addition, the shielding part 420 is provided, so that the attenuation of the large viewing angle of the display panel can be accelerated, and the display panel can be applied to the use scene of the peep-proof screen.

In one embodiment, the light emitting area of the sub-pixel 211 is positively correlated with the size of the corresponding filter portion 410. It can be appreciated that the larger the size of the light shielding portion 420, the better the shielding effect on the reflected ambient light, which is more advantageous for improving the reflection phenomenon. In order to achieve a better light shielding effect, the thickness of the light shielding portion 420 is generally 1.5um to 2.5um, so as to shield the light emitted from the large viewing angle of the display panel more. However, similar to the effect of the size of the dimming unit 310 on the light output from the small viewing angle of the display panel, if the same size of the light shielding portion 420 is used for the sub-pixels 211 corresponding to different light emitting areas, the problem of large viewing angle bias of the display panel is caused by different brightness attenuation from the large viewing angle. Therefore, the sizes of the corresponding light shielding portions 420 can be designed differently for the sub-pixels 211 with different light emitting areas, so that the sub-pixels 211 with different light emitting areas can be matched with each other in the light emitting of the large viewing angle, and the large viewing angle bias of the display panel can be reduced. It will be appreciated that the large viewing angle color shift of the display panel may also be related to other factors than the light emitting area of the sub-pixel 211, such as the light emitting wavelength of the sub-pixel 211. Therefore, the size of the light filtering portion 410 may be determined by a plurality of factors, not just the light emitting area of the sub-pixel 211. Before determining the size of the filter portion 410, the large visual angle bias of the display panel having the same size of each light shielding portion 420 may be detected, and the size of each light shielding portion 420 may be determined comprehensively according to the detection result.

For example, in general, the display panel is prone to color shift problems due to blue color shift with a large viewing angle, because the emission area of the blue sub-pixel is maximized. Therefore, the size of the filter portion 410 corresponding to the blue sub-pixel may be reduced and the size of the corresponding light shielding portion 420 may be increased, so that the large viewing angle light emission of the blue sub-pixel is blocked, or the size of the filter portion 410 corresponding to the red sub-pixel 211a and the green sub-pixel 211b may be increased and the size of the corresponding light shielding portion 420 may be reduced, so that the large viewing angle light emission of the red sub-pixel 211a and the green sub-pixel 211b may be enlarged. In some embodiments, the display panel is affected by a plurality of factors, and the color shift problem of the large viewing angle is caused, so that the size of the filter portion 410 corresponding to the green sub-pixel 211b can be increased to block the large viewing angle light emission of the green sub-pixel 211b, or the size of the filter portion 410 corresponding to the red sub-pixel 211a and the blue sub-pixel can be reduced to expand the large viewing angle light emission of the red sub-pixel 211a and the blue sub-pixel. In the embodiment of the application, the light output amounts of different colors in the respective viewing angle ranges can be comprehensively balanced by synchronously adjusting the size of the dimming unit 310 and the size of the light shielding portion 420, so as to reduce the color shift of the display panel in the small viewing angle and the large viewing angle, and improve the display quality of the display panel.

In one embodiment, the second distance L between the outer contour of the sub-pixel 211 and the outer contour of the corresponding filter portion 410 is inversely related to the light emitting area of the sub-pixel 211. That is, the larger the light emitting area of the sub-pixel 211, the smaller the second distance L, which means that the shielding portion 420 shields the light emitted from the corresponding sub-pixel 211 at a large viewing angle.

It is understood that, if the light shielding portions 420 are disposed at the same second distance L, the amounts of the light beams emitted in the wide viewing angle range are different after passing through the light shielding portions 420. For example, the light emitting area of the blue subpixel is larger than that of the red subpixel 211a, so that the blue subpixel emits more light from a large viewing angle than the red subpixel 211a emits from a large viewing angle, and thus the display device may also exhibit a blue color in a large viewing angle range. For example, the second distance corresponding to the blue sub-pixel may be set to 3.5um, the second distance L2 corresponding to the green sub-pixel 211b may be set to 4um, and the second distance L1 corresponding to the red sub-pixel 211a may be set to 3um. It should be noted that whether or not blue light is more than red light is evaluated based on a predetermined ratio of light emission amount contributions. For example, if the contribution of the blue sub-pixel to the luminance is required to be 10% and the contribution of the red sub-pixel 211a to the luminance is required to be 20% when the target white light is emitted, it can be evaluated that the emitted blue light is more than the emitted red light when the contribution of the blue sub-pixel to the luminance is 12% and the contribution of the red sub-pixel 211a to the luminance is 20%.

In the embodiment of the application, for the sub-pixel 211 with a smaller light emitting area, the light shielding portion 420 with a smaller second distance L may be used to reduce the shielding degree of the light shielding portion 420 to the light beam in the large viewing angle range, so as to increase the light emitting amount of the light beam in the large viewing angle range under the combined action of the sub-pixel 211 and the light shielding portion 420, for example, increase the light emitting amount of the red sub-pixel 211 a. Accordingly, for the sub-pixel 211 with a larger light emitting area, the light shielding portion 420 with a larger second distance L can be used to expand the shielding degree of the light shielding portion 420 to the light beam in the large viewing angle range, so as to reduce the light emitting amount of the light beam in the large viewing angle range under the combined action of the sub-pixel 211 and the light shielding portion 420, for example, reduce the light emitting amount of the blue sub-pixel. Therefore, by adjusting the size of the light shielding part 420, the light output of the large viewing angles of different colors in the display panel can be more balanced, thereby reducing the bias of the large viewing angle in the display process.

With continued reference to fig. 1, in one embodiment, a filter layer 400 is located between the light emitting layer 200 and the light path adjustment layer 300. Further, the top surface of the light filtering portion 410 is higher than the top surface of the light shielding portion 420, the top surface of the light filtering portion 410 is the surface of the light filtering portion 410 on the side far from the light emitting layer 200, and the top surface of the light shielding portion 420 is the surface of the light shielding portion 420 on the side far from the light emitting layer 200. A portion of the bottom surface of the low-refraction portion 312 is adhered to the surface of the light shielding portion 420 on the side away from the light emitting layer 200, and another portion of the bottom surface of the low-refraction portion 312 is located in the light filtering portion 410. Also, the center of the filter portion 410 and the center of the high-folded portion 311 are aligned in the thickness direction of the display panel. Based on the above structure, the light beam from the sub-pixel 211 passes through the corresponding filter layer 400, so that the stray light except the light emission wavelength of the sub-pixel 211 is filtered by the filter portion 410, and the light-shielding portion 420 shields the light within the excessively large viewing angle range. The filtered light beam enters the interface between the low refraction portion 312 and the high refraction portion 311 through the high refraction portion 311, and the light beam is totally reflected at the interface and then exits after returning to the high refraction portion 311, so that the light path adjustment of the light beam emitted by the corresponding sub-pixel 211 is realized. Since the refractive index of the high refractive portion 311 is also different from that of the filter portion 410, when the light beam enters the high refractive portion 311 from the filter portion 410, a certain refraction occurs at the interface between the filter portion 410 and the high refractive portion 311, but the influence on the propagation direction of the light beam is small. Therefore, refraction at the interface of the above-described filter portion 410 and the high-refraction portion 311 is not shown in fig. 1.

In one embodiment, the display panel further includes a touch layer 500. The touch layer 500 is located at a side of the light emitting layer 200 near the light path adjusting layer 300. Specifically, the touch layer 500 includes a first sub-touch layer 510 and a second sub-touch layer 520 that are stacked, and the second sub-touch layer 520 is located between the first sub-touch layer 510 and the filter layer 400. The first sub-touch layer 510 includes a plurality of first touch electrodes disposed at intervals, and the projection of the first touch electrodes on the substrate 100 and the projection of the sub-pixels 211 on the substrate 100 are staggered, so as to avoid the influence of the first touch electrodes on the display caused by shielding the sub-pixels 211. The second sub-touch layer 520 includes a plurality of second touch electrodes disposed at intervals, where the plurality of second touch electrodes are in one-to-one correspondence with the plurality of first touch electrodes, so that one first touch electrode and one corresponding second touch electrode form one touch unit.

Fig. 2 is a schematic diagram of a second film structure of a display panel according to an embodiment, referring to fig. 2, in one embodiment, the filter layer 400 is located on a side of the light path adjusting layer 300 away from the light emitting layer 200. Wherein the center of the light filtering part 410 and the center of the high folding part 311 are aligned in the thickness direction of the display panel. Based on the above structure, the light beam from the sub-pixel 211 is incident to the high-refraction portion 311, is totally reflected back to the high-refraction portion 311 at the interface between the low-refraction portion 312 and the high-refraction portion 311, then is incident to the filter layer 400, stray light outside the emission wavelength of the sub-pixel 211 is filtered by the corresponding filter portion 410, and the light emitting in the excessively large viewing angle range is blocked by the light blocking portion 420, so that the light path adjustment of the light beam emitted by the corresponding sub-pixel 211 is realized. Since the refractive index of the high refractive portion 311 is also different from that of the filter portion 410, when the light beam is incident on the filter portion 410 from the high refractive portion 311, a certain refraction occurs at the interface between the filter portion 410 and the high refractive portion 311, but the influence on the propagation direction of the light beam is small. Therefore, refraction at the interface of the above-described filter portion 410 and the high-refraction portion 311 is not shown in fig. 2.

Fig. 3 is a third schematic diagram of a film structure of a display panel according to an embodiment, and referring to fig. 3, the high-refraction portion 311 is multiplexed into a filtering portion 410 in the filtering layer 400. Specifically, a material corresponding to the light-transmitting frequency band may be mixed in the light beam resist of the high-refraction portion 311, so that the high-refraction portion 311 further has a filtering function. Based on the above structure, the light beam from the sub-pixel 211 is directly incident into the high-refraction portion 311 with the filtering function, so as to filter the stray light except the light emitting wavelength of the sub-pixel 211 through the filtering portion 410, and after reaching the interface between the low-refraction portion 312 and the high-refraction portion 311, the light beam is totally reflected back to the high-refraction portion 311 and then emitted, thereby realizing the light path adjustment of the light beam emitted by the corresponding sub-pixel 211. Further, the light shielding portion 420 may cover at least a portion of the top surface of the low-folding portion 312, the high-folding portion 311 covers the remaining portion of the top surface of the low-folding portion 312, and the top surface of the light shielding portion 420 is flush with the top surface of the high-folding portion 311. In some embodiments, the light shielding portion 420 may also be located on the bottom surface of the low-folded portion 312, that is, the low-folded portion 312 is located on the light shielding portion 420, which is not limited herein. In the embodiment of the application, the shielding of the reflected light can be achieved by providing the light shielding part 420, so that the display quality of the display panel is improved. In addition, the high-refraction portion 311 is multiplexed into the filter portion 410 in the filter layer 400, so that the filter portion 410 with a single function is not required to be arranged, the number of film layers required to be arranged in the display panel can be reduced, and the overall thickness of the display panel can be greatly reduced.

In one embodiment, the display panel further includes a touch layer 500. The touch layer 500 is located at a side of the light emitting layer 200 near the light path adjusting layer 300, and is partially located in the light path adjusting layer 300. Specifically, the touch layer 500 includes a first sub-touch layer 510 and a second sub-touch layer 520 that are stacked, and the second sub-touch layer 520 is located in the optical path adjusting layer 300. The first sub-touch layer 510 includes a plurality of first touch electrodes disposed at intervals, and the projection of the first touch electrodes on the substrate 100 and the projection of the sub-pixels 211 on the substrate 100 are staggered, so as to avoid the influence of the first touch electrodes on the display caused by shielding the sub-pixels 211. The second sub-touch layer 520 includes a plurality of second touch electrodes disposed at intervals, where the plurality of second touch electrodes are located in the plurality of low-folded portions 312 in a one-to-one correspondence manner, and the plurality of second touch electrodes are in a one-to-one correspondence with the plurality of first touch electrodes, so that one first touch electrode and one corresponding second touch electrode form a touch unit.

Fig. 4 is a schematic diagram of a film structure of a display panel according to an embodiment, referring to fig. 4, in one embodiment, a dashed box in fig. 4 is a dimming unit, and the high-refraction portion 311 is located in a central region of the dimming unit 310 and covers a portion of a bottom surface of the dimming unit 310. The low folded portion 312 is located at a peripheral region of the dimming unit 310 and covers a bottom surface of the dimming unit 310 exposed by the Gao She portion 311. The top surface of the high folded portion 311 is located between two surfaces of the dimming unit 310, and the low folded portion 312 also covers the top surface of the Gao She portion 311. The included angle between the tangential plane and the display surface at each point on the interface between the high-refraction portion 311 and the low-refraction portion 312 is in the second angle range, so that the light beam emitted by the corresponding sub-pixel 211 is refracted at the interface between the high-refraction portion 311 and the low-refraction portion 312. The second angular range is understood to be an angular range in which no total reflection of the incident light can occur. It can be understood that, with the above structure, if the light beam from the sub-pixel 211 is totally reflected at the interface between the high-refraction portion 311 and the low-refraction portion 312, the light beam cannot be extracted, so that the light extraction efficiency of the display panel is greatly affected. Further, the filter layer 400 is located at a side of the light path adjustment layer 300 away from the light emitting layer 200. Based on the above structure, the light beam from the sub-pixel 211 directly enters the high-refraction portion 311, and after reaching the interface between the low-refraction portion 312 and the high-refraction portion 311, the refracted light beam further enters the filter layer 400 through the low-refraction portion 312, stray light outside the emission wavelength of the sub-pixel 211 is filtered by the corresponding filter portion 410, and the light-emitting within the excessively large viewing angle range is blocked by the light-blocking portion 420, so that the light path adjustment of the light beam emitted by the corresponding sub-pixel 211 is realized. Further, the top surface of the high-refraction portion 311 may be an arc surface to further improve the light beam extraction efficiency of the light modulation unit 310.

In one embodiment, the display panel further includes a touch layer 500. The touch layer 500 is located at a side of the light path adjusting layer 300 away from the light emitting layer 200. Specifically, the touch layer 500 includes a first sub-touch layer 510 and a second sub-touch layer 520 that are stacked. The first sub-touch layer 510 includes a plurality of first touch electrodes disposed at intervals, and the projection of the first touch electrodes on the substrate 100 and the projection of the sub-pixels 211 on the substrate 100 are staggered, so as to avoid the influence of the first touch electrodes on the display caused by shielding the sub-pixels 211. The second sub-touch layer 520 includes a plurality of second touch electrodes disposed at intervals, the plurality of second touch electrodes are respectively located between two adjacent light filtering portions 410 in a one-to-one correspondence manner, and the plurality of light shielding portions 420 are respectively located on the plurality of second touch electrodes in a one-to-one correspondence manner, and the plurality of second touch electrodes are respectively in a one-to-one correspondence manner with the plurality of first touch electrodes, so that one first touch electrode and one corresponding second touch electrode form one touch unit.

Referring to fig. 1 to 4 in combination, a dimming incidence region is disposed on a surface of the dimming unit 310 adjacent to the light emitting layer 200, and a first distance D between an outer contour of the sub-pixel 211 and an outer contour of the corresponding dimming incidence region is smaller than a second distance L between the outer contour of the sub-pixel 211 and an outer contour of the corresponding light filtering portion 410. That is, the projection of the sub-pixel 211 on the substrate 100 may completely fall on the projection of the light modulating incidence area on the substrate 100, and the projection of the light modulating incidence area on the substrate 100 may completely fall on the projection of the light filtering portion 410 on the substrate 100. In the embodiment of the application, by the above-mentioned size setting manner, the light beams emitted by the sub-pixels 211 can be effectively filtered by the filtering portion 410, so as to ensure the color purity of the emitted light beams. Moreover, by the cooperation of the dimming unit 310 and the light shielding part 420, the light extraction rate in the small viewing angle range of 0 ° to 30 ° can be effectively improved, so that the power consumption of the display panel is reduced, and the display panel has smaller color shift in the larger range of 0 ° to 80 °.

Fig. 5 is a schematic diagram of a film structure of a display panel according to an embodiment, referring to fig. 5, in one embodiment, a dashed box in fig. 5 is a dimming unit 310, and the dimming unit 310 includes a high-refractive portion 311 and a low-refractive portion 312, wherein a refractive index of the high-refractive portion 311 is higher than a refractive index of the low-refractive portion 312. Wherein, the refractive index Ncf of the high-folded portion 311 may be in a range of 1.5 < ncf+.2, such as ncf=1.6, ncf=1.65, ncf=1.7, ncf=1.75, ncf=1.8, ncf=1.85, ncf=1.9, ncf=1.95, or ncf=2. Specifically, the high refractive portion 311 may add high refractive index particles to the main component of the photoresist (Optical Contact adhesive, OC) or the like to have a higher refractive index. The high refractive index particles may include, but are not limited to, zirconia (ZrO 2), neodymium (Nd), or the like. The refractive index Noc of the low-refractive portion 312 may be in the range of 1.3++noc < 1.5, for example noc=1.3, noc=1.35, noc=1.4, noc=1.45, or noc=1.48. The low-refraction portion 312 may be made of a material having a low refractive index such as silicon (Si), photoresist, or the like. The light beam emitted by the sub-pixel 211 is incident to the high-refraction portion 311 through the low-refraction portion 312 of the corresponding dimming unit 310, so that the included angle between the light beam on the side of the outgoing light path adjusting layer 300, which is away from the light emitting layer 200, and the target direction is smaller than the included angle between the light beam incident from the sub-pixel 211 and the target direction.

With continued reference to fig. 5, the bottom surface of the high-fold portion 311 may be a plane, and the top surface of the high-fold portion 311 may be an arc surface. Further, the filter layer 400 is located between the light emitting layer 200 and the light path adjusting layer 300. Based on the above structure, the light beam from the sub-pixel 211 passes through the corresponding filter layer 400, so that the stray light except the light emission wavelength of the sub-pixel 211 is filtered by the filter portion 410, and the light-shielding portion 420 shields the light within the excessively large viewing angle range. The filtered light beam is incident to the interface between the low refraction portion 312 and the high refraction portion 311 through the high refraction portion 311, and the light beam is incident to the low refraction portion 312 after being refracted at the interface, so that the light path adjustment of the light beam emitted by the corresponding sub-pixel 211 is realized. In the embodiment shown in fig. 5, refraction is also present at the interface between the top surface of the high-refraction portion 311 and the low-refraction portion 312, but by setting the top surface of the high-refraction portion 311 to be a cambered surface, the incident angle of the light beam when it is incident on the interface can be changed, so that refraction of the light beam at the interface is reduced. Therefore, refraction at the interface of the top surface of the high-fold portion 311 and the low-fold portion 312 is not shown in fig. 5. Since the refractive index of the high refractive portion 311 is also different from that of the filter portion 410, when the light beam enters the high refractive portion 311 from the filter portion 410, a certain refraction occurs at the interface between the filter portion 410 and the high refractive portion 311, but the influence on the propagation direction of the light beam is small. Therefore, refraction at the interface of the above-described filter portion 410 and the high-refraction portion 311 is not shown in fig. 5. As another example, the bottom surface of the high refraction portion 311 may be a plane, and the high refraction portion 311 extends upward to the top surface of the light modulation unit 310, so that the light beam only needs to be refracted once inside the light modulation unit 310.

In one embodiment, a dimming incidence area is disposed on a surface of the dimming unit 310 near the light emitting layer 200, and a first distance D between an outer contour of the sub-pixel 211 and an outer contour of the corresponding dimming incidence area is greater than a second distance L between the outer contour of the sub-pixel 211 and an outer contour of the corresponding light filtering portion 410. That is, the projection of the sub-pixel 211 on the substrate 100 may completely fall on the projection of the filter portion 410 on the substrate 100, and the projection of the filter portion 410 on the substrate 100 may completely fall on the projection of the dimming incidence zone on the substrate 100. In the embodiment of the application, by the above-mentioned size setting manner, the light beams emitted by the sub-pixels 211 can be effectively filtered by the filtering portion 410, so as to ensure the color purity of the emitted light beams. Moreover, by the cooperation of the dimming unit 310 and the light shielding part 420, the light extraction rate in the small viewing angle range of 0 ° to 30 ° can be effectively improved, so that the power consumption of the display panel is reduced, and the display panel has smaller color shift in the larger range of 0 ° to 80 °.

In one embodiment, a dimming incidence area is disposed on a surface of the dimming unit 310 near the light emitting layer 200, and a first distance between an outer contour of each dimming incidence area and an outer contour of the corresponding sub-pixel 211 is the same. Wherein, some of the sub-pixels 211 do not have corresponding dimming units 310, so that the distribution densities of the dimming units 310 corresponding to the sub-pixels 211 of different colors are different. Specifically, the same first distance design may be adopted for the sub-pixels 211 with different colors, but the differential design of the dimming units 310 is achieved by controlling the densities of the dimming units 310 corresponding to the sub-pixels 211 with different colors.

It can be understood that in the case where the light emitting area and the aperture ratio of the sub-pixel 211 are large, the light beam emitted from the sub-pixel 211 can be extracted well, thereby making the light extraction efficiency high. In the case where the light emitting area and the aperture ratio of the sub-pixel 211 are small, the light beam emitted from the light emitting material may be trapped inside the sub-pixel 211, resulting in poor light extraction efficiency. That is, when the dimming unit 310 is not provided, the light beam extraction efficiency of the different sub-pixels 211 is positively correlated with the light emitting area. If the dimming unit 310 is disposed at the same first distance corresponding to the sub-pixels 211 having different light emitting areas, the amount of the light beam emitted in the small viewing angle range is different after passing through the dimming unit 310. For example, the light emitting area of the red subpixel 211a is larger than the light emitting area of the green subpixel 211b, so that the red subpixel 211a emits more light from a small viewing angle than the green subpixel 211b emits from a small viewing angle. After passing through the dimming cells 310 arranged with the same first distance, the red light emitted at a small viewing angle is still more than the green light emitted. Therefore, the number of dimming units 310 corresponding to the red subpixel 211a can be reduced, so that the light emitting efficiency of the red subpixel 211a in a small viewing angle range is reduced, and the situation that the display device displays color reddening in the small viewing angle range is reduced. Whether or not more red light than green light is evaluated based on a predetermined ratio of light emission amount contribution. For example, when the contribution of the red sub-pixel 211a to the luminance is required to be 20% and the contribution of the green sub-pixel 211b to the luminance is required to be 60% when the target white light is emitted, it can be evaluated that the emitted red light is more than the emitted green light when the contribution of the red sub-pixel 211a to the luminance is 25% and the contribution of the green sub-pixel 211b to the luminance is 55%.

In the embodiment of the application, for the sub-pixel 211 with a smaller light emitting area, due to insufficient light emitting quantity, the dimming unit 310 with a larger density may be disposed to improve the light emitting efficiency of the dimming unit 310 in a small viewing angle range, so as to increase the light emitting quantity of the light beam in the small viewing angle range under the combined action of the sub-pixel 211 and the dimming unit 310, for example, increase the light emitting quantity of the green sub-pixel 211 b. Accordingly, for the sub-pixel 211 with a larger light emitting area, since the light emitting amount of the sub-pixel 211 is larger, the dimming unit 310 with smaller density can be used to reduce the improvement degree of the light emitting efficiency of the dimming unit 310 on the light beam in the small viewing angle range, so as to reduce the light emitting amount of the light beam in the small viewing angle range under the combined action of the sub-pixel 211 and the dimming unit 310, for example, reduce the light emitting amount of the red sub-pixel 211 a. Therefore, by adjusting the distribution density of the dimming unit 310, the light output of the small viewing angles of different colors in the display panel can be more balanced, so that the small viewing angle bias in the display process can be reduced.

In one embodiment, the number of the sub-pixels 211 without the corresponding dimming units 310 is plural, and the sub-pixels 211 are axisymmetrically or centrosymmetrically arranged. The extending direction of the symmetry axis may be the column direction of the sub-pixels 211, so that no obvious color shift is perceived when the user observes the electronic device from the small viewing angle ranges on the left and right sides. The extending direction of the symmetry axis may be the row direction of the sub-pixels 211, so that no obvious color shift is perceived when the user observes the electronic device from a small viewing angle range on the upper side and the lower side. Similarly, the sub-pixels 211 without the corresponding dimming units 310 may be arranged in a central symmetry manner, so that no obvious color shift is perceived when the user observes the electronic device in any direction within a small viewing angle range.

The embodiment of the application also provides a display screen, which comprises the cover plate 620 and the display panel. And a cover plate 620 positioned on the light emitting side of the display panel and covering the display panel. Referring to fig. 1 to 5 in combination, the cover plate 620 may be Ultra-thin glass (Ultra THIN GLASS, UTG). In this embodiment, by providing the cover plate 620, the display panel can be protected, and damage to the display panel caused by external force is reduced, thereby improving reliability of the display panel. Further, an optical adhesive layer 610 is disposed between one of the light path adjusting layer 300 and the filter layer 400, which is far from the light emitting layer 200, and the cover plate 620, and a polyester film 630 (PET) is further disposed on a side of the cover plate 620, which is far from the optical adhesive layer 610.

The embodiment of the application also provides a display device, such as the display screen. In this embodiment, based on the foregoing display screen, a display device with stable and reliable display screen is provided.

Specifically, the display device may be, but not limited to, various personal computers, notebook computers, smart phones, tablet computers, internet of things devices, and portable wearable devices, and the internet of things devices may be smart speakers, smart televisions, smart air conditioners, smart vehicle devices, and the like. The portable wearable device may be a smart watch, smart bracelet, headset, or the like. Fig. 6 is an internal structural diagram of a display device of an embodiment. The display device includes a processor, a memory, a communication interface, a display screen, and an input device connected by a system bus. Wherein the processor of the display device is configured to provide computing and control capabilities. The memory of the display device includes a nonvolatile storage medium, an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The communication interface of the display device is used for conducting wired or wireless communication with an external terminal, and the wireless communication can be realized through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. The input device of the display device can be a touch layer covered on a display screen, can also be keys, a track ball or a touch pad arranged on a shell of the display device, and can also be an external keyboard, a touch pad or a mouse and the like.

It will be appreciated by those skilled in the art that the structure shown in fig. 6 is merely a block diagram of a portion of the structure associated with the present inventive arrangements and is not limiting of the display device to which the present inventive arrangements are applied, and that a particular display device may include more or fewer components than shown in fig. 6, or may combine certain components, or have a different arrangement of components.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples merely represent several implementations of embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that various modifications and improvements can be made to the present application without departing from the spirit of the embodiments of the application. Accordingly, the protection scope of the patent of the embodiments of the application shall be subject to the appended claims.

Claims

1. A display panel, comprising:

A substrate;

The light path adjusting layer is positioned on one side of the light emitting layer, which is far away from the substrate, the light path adjusting layer is provided with a plurality of light adjusting units, the light adjusting units are respectively and correspondingly arranged with the sub-pixels, the light adjusting units are used for adjusting light beams emitted by the corresponding sub-pixels so that the included angle between the light beams emitted to one side of the light path adjusting layer, which is far away from the light emitting layer, and the target direction is smaller than the included angle between the light beams incident from the sub-pixels and the target direction, and the target direction is perpendicular to the display surface of the display panel;

2. The display panel of claim 1, further comprising:

The light filtering layer comprises a plurality of light filtering parts and a plurality of light shielding parts, wherein the light filtering parts and the light shielding parts are alternately arranged, the light filtering parts are respectively arranged corresponding to the sub-pixels, and the light transmission frequency range of the light filtering parts corresponds to the light emission wavelength of the corresponding sub-pixels.

3. The display panel of claim 2, wherein the light emitting area of the sub-pixel is positively correlated with the size of the corresponding filter.

4. A display panel according to claim 3, wherein a second distance between the outer contour of the sub-pixel and the corresponding outer contour of the filter portion is inversely related to the light emitting area of the sub-pixel.

5. The display panel according to claim 2, wherein the dimming unit includes a high-refractive portion and a low-refractive portion, the refractive index of the high-refractive portion being higher than the refractive index of the low-refractive portion;

The light beams emitted by the sub-pixels are incident to the low-refraction portions through the corresponding high-refraction portions of the dimming units, so that the included angle between the emergent light beams and the target direction is smaller than the included angle between the incident light beams and the target direction.

6. The display panel according to claim 5, wherein the high-refraction portion is located in a central area of the light modulation unit and extends from a surface of the light modulation unit near the light emitting layer to a surface of the light modulation unit far away from the light emitting layer, the low-refraction portion is located in a peripheral area of the light modulation unit and contacts with the high-refraction portion, and an included angle between a tangential plane at each point on an interface between the high-refraction portion and the low-refraction portion and the display surface is in a first angle range, so that at least part of light beams from the corresponding sub-pixels are totally reflected at the interface between the high-refraction portion and the low-refraction portion.

7. The display panel of claim 6, wherein the high-fold portions are multiplexed as filter portions in the filter layer.

8. The display panel according to claim 6, wherein the filter layer is located between the light emitting layer and the light path adjustment layer.

9. The display panel according to claim 5, wherein the high-refraction portion is located in a central area of the dimming unit, a top surface of the high-refraction portion is located between two surfaces of the dimming unit, the low-refraction portion covers the high-refraction portion and a bottom surface of the dimming unit exposed by the high-refraction portion, and an included angle between a tangential plane at each point on an interface between the high-refraction portion and the low-refraction portion and the display surface is in a second angle range, so that light beams emitted by the corresponding sub-pixels are refracted at the interface between the high-refraction portion and the low-refraction portion.

10. The display panel according to claim 6 or 9, wherein the filter layer is located on a side of the light path adjustment layer away from the light emitting layer.

11. The display panel according to claim 5, wherein a dimming incidence area is disposed on a surface of the dimming unit adjacent to the light emitting layer, and a first distance between an outer contour of the sub-pixel and an outer contour of the corresponding dimming incidence area is smaller than a second distance between the outer contour of the sub-pixel and an outer contour of the corresponding light filtering portion.

12. The display panel according to claim 2, wherein the dimming unit includes a high-refractive portion and a low-refractive portion, the refractive index of the high-refractive portion being higher than the refractive index of the low-refractive portion;

The light beams emitted by the sub-pixels are incident to the high-refraction portions through the low-refraction portions of the corresponding dimming units, so that the included angle between the emergent light beams and the target direction is smaller than the included angle between the incident light beams and the target direction.

13. The display panel according to claim 12, wherein the filter layer is located between the light emitting layer and the light path adjustment layer.

14. The display panel according to claim 13, wherein a dimming incidence area is disposed on a surface of the dimming unit adjacent to the light emitting layer, and a first distance between an outer contour of the sub-pixel and an outer contour of the corresponding dimming incidence area is greater than a second distance between the outer contour of the sub-pixel and an outer contour of the corresponding light filtering portion.

15. The display panel according to claim 1, wherein a dimming incidence area is disposed on a surface of the dimming unit adjacent to the light emitting layer, the dimming unit is configured to adjust a light beam incident from the dimming incidence area, and a first distance between an outer contour of the dimming incidence area and an outer contour of the corresponding sub-pixel is inversely related to a light emitting area of the sub-pixel.

16. The display panel according to claim 1, wherein a dimming incidence area is arranged on one surface of the dimming unit, which is close to the light emitting layer, and a first distance between an outer contour of each dimming incidence area and an outer contour of the corresponding sub-pixel is the same;

And part of the subpixels do not have the corresponding dimming units, so that the distribution densities of the dimming units corresponding to the subpixels with different colors are different.

17. The display panel of claim 15, wherein the number of the sub-pixels without the corresponding dimming unit is plural, and the plurality of sub-pixels are axisymmetrically or centrosymmetrically arranged.

18. The display panel of claim 1, further comprising:

The touch control layer is positioned on one side of the light-emitting layer, which is close to the light path adjusting layer, or on one side of the light path adjusting layer, which is far away from the light-emitting layer.

19. A display screen, comprising:

the display panel of any one of claims 1 to 18;

20. A display device comprising the display screen of claim 19.