Display panel and electronic device

Abstract

The embodiments of the present application relate to the field of display. Provided are a display panel and an electronic device, which are used to ameliorate a color deviation at a viewing angle. The display panel comprises: a substrate; a light-emitting device layer, which is located on one side of the substrate, wherein the light-emitting device layer comprises a plurality of light-emitting units, and the light-emitting units include a first light-emitting unit and a second light-emitting unit which emit light of different colors; and a light-filtering layer, which is located on the side of the light-emitting device layer away from the substrate, wherein the light-filtering layer comprises a black matrix, the black matrix has a plurality of light-transmitting holes, and in a direction perpendicular to a plane where the substrate is located, the light-transmitting holes correspond to the light-emitting units on a one-to-one basis, and the light-emitting units are located within the corresponding light-transmitting holes; and on one side of the light-emitting units in a first direction, the distance between an edge of each light-emitting unit and an edge of the light-transmitting hole corresponding thereto is a first distance, and the first distance corresponding to the first light-emitting unit is greater than the first distance corresponding to the second light-emitting unit.

Description

Display panels and electronic devices

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on January 18, 2024, with application number 202410074088.5 and application name “Display Panel and Electronic Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of display technology, and in particular to a display panel and an electronic device. Background Art

[0003] Organic Light-Emitting Diode (OLED) display panels are widely used in various display fields due to their many advantages such as self-luminescence, high luminous efficiency, and short response time.

[0004] Currently, most OLED display panels use depolarizer technology, using a filter layer instead of a polarizer to reduce reflectivity. However, this type of display panel has a more obvious color deviation problem in the viewing angle, resulting in poor display effects.

[0005] Summary of the Invention

[0006] In view of this, the present application provides a display panel and an electronic device to improve color deviation of viewing angle.

[0007] In a first aspect, embodiments of the present application provide a display panel comprising: a substrate; a light-emitting device layer located on one side of the substrate, the light-emitting device layer comprising a plurality of light-emitting units, the light-emitting units comprising a first light-emitting unit and a second light-emitting unit that emit light of different colors; and a filter layer located on a side of the light-emitting device layer away from the substrate, the filter layer comprising a black matrix having a plurality of light-transmitting holes, wherein the light-transmitting holes correspond one-to-one with the light-emitting units in a direction perpendicular to the plane of the substrate, and the light-emitting units are located within the corresponding light-transmitting holes. On one side of the light-emitting units in a first direction, the distance between the edge of the light-emitting unit and the edge of the corresponding light-transmitting hole is a first distance, wherein the first distance corresponding to the first light-emitting unit is greater than the first distance corresponding to the second light-emitting unit.

[0008] In the black matrix design of the present embodiment, the degree of expansion of the light-transmitting holes above the light-emitting units of different colors in the first direction is differentiated. This allows for adjustment of the brightness ratio of different colors of light at wide viewing angles. For example, by designing the light-transmitting holes above the first light-emitting unit to have a greater degree of expansion in the first direction, the degree to which the black matrix blocks the wide-angle light emitted by the first light-emitting unit can be significantly reduced, significantly reducing the brightness attenuation of this color of light at wide viewing angles. This allows for targeted adjustment of the brightness ratio of different colors of light at wide viewing angles, thereby reducing visual color shift.

[0009] In a feasible implementation manner, the first light-emitting unit includes a green light-emitting unit.

[0010] Compared to red and blue light, green light contributes more to the brightness of white light, and its brightness attenuation has a greater impact on the color shift of the white screen. To this end, the embodiments of the present application preferably expand the light-transmitting aperture above the green light-emitting unit to a greater extent in the first direction. This minimizes the black matrix's obstruction of the wide-angle green light emitted by the green light-emitting unit, reduces the attenuation of green light at wide viewing angles, and reduces the risk of color shift in the white screen.

[0011] Furthermore, the second light-emitting unit includes a red light-emitting unit and a blue light-emitting unit, wherein the first distance corresponding to the red light-emitting unit is greater than the first distance corresponding to the blue light-emitting unit.

[0012] When the display panel is in the off state, ambient light enters the display panel through the light-transmitting holes and is reflected back by the anodes in the light-emitting units 3. However, because different color light-emitting units have different lifespans and decay rates, the sizes of the different color light-emitting units are generally designed to be different. Currently, the blue light-emitting unit is often designed to be the largest, and the green light-emitting unit is designed to be the smallest. This results in more blue ambient light entering the panel and being further reflected. This leads to the problem of a long hue trajectory when the display panel is in the off state due to the abnormal reflection ratio of different color ambient light.

[0013] The above structure can reduce the amount of reflected blue ambient light by setting the outward expansion of the light-transmitting hole above the blue light-emitting unit in the first direction to the minimum, thereby improving the display panel to have a better hue trajectory when the screen is off.

[0014] In one feasible embodiment, the first distances corresponding to opposite sides of the light-emitting unit are equal. In this case, the light-transmitting hole has the same outward extension distance on both sides of the light-emitting unit in the first direction, and the black matrix blocks the high-angle light emitted from opposite sides of the light-emitting unit to a consistent degree, which helps optimize the light-emitting unit's light output performance from the opposite side viewing angle.

[0015] In one feasible embodiment, the display panel further includes data lines, and the first direction is parallel to the extension direction of the data lines. When a user views the screen, from the user's first perspective, the vertical viewing direction of the screen is more likely to display a perspective scene than the left and right viewing direction. Setting the first direction parallel to the extension direction of the data lines prioritizes improving color shift in the vertical and horizontal viewing directions, resulting in better color tracking performance in the vertical direction.

[0016] In a feasible embodiment, on one side of the second direction of the light-emitting unit, the distance between the edge of the light-emitting unit and the edge of the corresponding light-transmitting hole is the second distance, and the second direction intersects with the first direction; wherein, the first distance corresponding to the first light-emitting unit is greater than the corresponding second distance, and the first distance corresponding to the second light-emitting unit is less than or equal to the corresponding second distance.

[0017] The present application further provides differentiated designs for the first distance and the second distance corresponding to the light-emitting units of different colors, so that the light-emitting units can achieve both weakening the color deviation and reducing the reflectivity of the panel.

[0018] Specifically, the brightness attenuation of green light has a significantly greater impact on color shift. Therefore, when designing the light-transmitting hole above the green light-emitting unit, prioritizing its use to improve color shift in the vertical viewing angle can be considered. To this end, the first distance corresponding to the green light-emitting unit can be increased, allowing the light-transmitting hole above the green light-emitting unit to expand further in the vertical viewing angle direction (the first direction). Furthermore, there is no need to set the second distance corresponding to the green light-emitting unit too large. By making the second distance smaller than the first distance, the light-transmitting hole above the green light-emitting unit can be prevented from expanding too much and affecting the panel reflectivity.

[0019] Since the brightness attenuation of red and blue light has a smaller impact on color shift, the design of the light-transmitting holes above the red and blue light-emitting units should prioritize improving their reflectivity. To address this, without increasing the first distances corresponding to these light-emitting units, the first distances corresponding to these units can be set to a smaller value. For example, the first distance corresponding to the blue light-emitting unit can be set to be smaller than the second distance, further reducing the size of the light-transmitting holes above the blue light-emitting units to further reduce the amount of blue reflected ambient light, thereby further optimizing the hue trajectory of the display panel when the screen is off.

[0020] In one feasible embodiment, on one side of the light-emitting unit in the second direction, the distance between the edge of the light-emitting unit and the edge of the corresponding light-transmitting hole is the second distance, and the second direction intersects the first direction. Because viewing angle scenes are more likely to appear in the vertical direction of the screen than in the horizontal direction, the embodiment of the present application, provided that the first distance corresponding to the light-emitting unit has been optimized, can design the light-transmitting holes above different light-emitting units to have the same outward extension distance in the second direction, thereby simplifying the size design of the light-transmitting holes. In other words, the second distance corresponding to the first light-emitting unit is equal to the second distance corresponding to the second light-emitting unit.

[0021] In a feasible embodiment, the filter layer also includes a filter structure, which includes a filter unit, the filter unit corresponds to the light transmission hole one by one, and the filter unit is located in the corresponding light transmission hole; the filter unit includes a first part and a second part, the second part is located on a side of the first part close to the edge of the light transmission hole, wherein the film thickness of the second part is less than the film thickness of the first part, so as to reduce the transmission distance of the large-viewing angle light in the filter unit when it passes through the filter unit obliquely, so that the optical path of the obliquely transmitted light tends to the optical path of the vertically transmitted light, thereby weakening the brightness difference under different viewing angles.

[0022] Furthermore, the display panel also includes: an encapsulation layer, located between the light-emitting device layer and the filter layer; a touch function layer, located between the encapsulation layer and the filter layer, the touch function layer includes a touch electrode and a glue layer, wherein the glue layer is adjacent to the filter unit, the glue layer has a recess, and the filter unit is located in the recess.

[0023] This structure utilizes the display panel's existing film layer to support the filter unit, eliminating the need for additional supporting film layers and thus maintaining the module's original thickness. Furthermore, compared to other film layers like the inorganic encapsulation layer and insulation layer, the adhesive layer is thicker, thus minimizing restrictions on the design of the recess depth. For example, a deeper recess can be formed, resulting in a greater thickness difference between the first and second portions.

[0024] In a feasible embodiment, the film thickness of the first part at different positions is equal, and in the direction perpendicular to the plane of the substrate, the geometric center of the first part coincides with the geometric center of the light-emitting unit overlapping with it, so that the vertically transmitted light emitted from the middle of the light-emitting unit can be emitted through the first part with uniform thickness, and its optical path is equal, and the light output effect at the normal viewing angle is better.

[0025] In a feasible embodiment, for the overlapping first portion and the light emitting unit, in the same direction, the size of the first portion is greater than or equal to 50% and less than or equal to 120% of the size of the light emitting unit.

[0026] If the first portion is too small, the optical paths of the light rays transmitted vertically within the filter unit will differ significantly, affecting the light output at normal viewing angles. If the first portion is too large, the size of the light-transmitting apertures will need to be increased, which may affect the arrangement of the apertures and reduce pixel density. The above structure, however, achieves both normal viewing angle light output and a higher pixel density.

[0027] In a feasible embodiment, the angle between the bottom surface of the second portion close to the substrate and the plane where the substrate is located is less than 45°, so that the filter unit has a smooth thickness transition from the middle to both sides, thereby optimizing the light extraction effect.

[0028] In a feasible embodiment, on one side of the first direction of the first part, the distance between the edge of the second part and the edge of the first part is a third distance, and on one side of the second direction of the first part, the distance between the edge of the second part and the edge of the first part is a fourth distance, and the second direction intersects with the first direction.

[0029] Among them, for the filter unit corresponding to the first light-emitting unit, the third distance corresponding to the filter unit is greater than the corresponding fourth distance; for the filter unit corresponding to the second light-emitting unit, the third distance corresponding to the filter unit is less than or equal to the corresponding fourth distance.

[0030] Because the brightness attenuation of green light has a significantly greater impact on color shift, when designing the filter units corresponding to the green light-emitting units, the unequal thickness range of these filter units in the first direction can be designed to be larger. This can greatly reduce the optical path of green light transmitted obliquely in the upper and lower viewing angles (the first direction), optimize the light output of the green light-emitting units in the upper and lower viewing angles, and further improve the color shift phenomenon in the upper and lower wide viewing angles. Since the brightness attenuation of red and blue light has a lesser impact on color shift, when designing the filter units corresponding to the red and blue light-emitting units, the unequal thickness range of these filter units in the first direction can be designed to be smaller. This allows the filter units to achieve a greater anti-reflection effect, helping to further reduce the panel reflectivity.

[0031] In one feasible embodiment, the filter structure comprises a semi-transparent optical adhesive material, covering the light-emitting device layer in a direction perpendicular to the substrate plane. This filter layer structure is simple, requiring only two process steps to form the black matrix and filter structure, significantly reducing the process flow and cost. Furthermore, the filter structure can be bonded to an upper cover plate or other structure, eliminating the need for an additional optical adhesive layer.

[0032] On the second aspect, based on the same inventive concept, an embodiment of the present application further provides an electronic device, comprising the above-mentioned display panel, which can have a better color trajectory. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0034] FIG1 is a schematic structural diagram of a display panel provided in an embodiment of the present application;

[0035] FIG2 is a schematic diagram of a transmittance variation curve provided by an embodiment of the present invention;

[0036] FIG3 is a schematic diagram of another transmittance variation curve provided by an embodiment of the present invention;

[0037] FIG4 is a schematic diagram of a color shift trajectory provided by an embodiment of the present invention;

[0038] FIG5 is a top view of a display panel provided in an embodiment of the present application;

[0039] FIG6 is a cross-sectional view of FIG5 along the A1-A2 direction;

[0040] FIG7 is another top view of the display panel provided in an embodiment of the present application;

[0041] FIG8 is a cross-sectional view of FIG7 along the B1-B2 direction;

[0042] FIG9 is another top view of the display panel provided by the embodiment of the present invention;

[0043] FIG10 is another top view of the display panel provided in an embodiment of the present application;

[0044] FIG11 is another top view of the display panel provided in an embodiment of the present application;

[0045] FIG12 is another structural diagram provided in an embodiment of the present application;

[0046] FIG13 is a schematic diagram showing a comparison of light transmission provided in an embodiment of the present application;

[0047] FIG14 is a schematic diagram of another structure of a display panel provided by an embodiment of the present invention;

[0048] FIG15 is another top view of the display panel provided in an embodiment of the present application;

[0049] FIG16 is a cross-sectional view of FIG15 along the C1-C2 direction;

[0050] FIG17 is a cross-sectional view of FIG15 along the direction D1-D2;

[0051] FIG18 is a cross-sectional view of FIG15 along the direction E1-E2;

[0052] FIG19 is a schematic diagram of another structure of a display panel provided in an embodiment of the present application;

[0053] FIG20 is a schematic structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0054] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0055] It should be clear that the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0056] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms "a", "an", "the" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0057] It should be understood that the term "and / or" as used herein simply describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone. Furthermore, the character " / " in this document generally indicates an "or" relationship between the associated objects.

[0058] An embodiment of the present application provides a display panel, which may specifically be an OLED display panel.

[0059] FIG1 is a schematic diagram of the structure of a display panel provided in an embodiment of the present application. As shown in FIG1 , the display panel includes a substrate 1 and a light-emitting device layer 2. The light-emitting device layer 2 is located on one side of the substrate 1 and includes a plurality of light-emitting units 3. The light-emitting units 3 include a first light-emitting unit 4 and a second light-emitting unit 5 that emit light of different colors.

[0060] More specifically, the light-emitting unit 3 includes a stacked anode 6, a light-emitting layer 7, and a cathode 8. The light-emitting device layer 2 also includes a pixel definition layer 9, which is used to define a pixel opening area 10 and a non-opening area 11. The position of the light-emitting unit 3 corresponds to the pixel opening area 10.

[0061] The display panel also includes a filter layer 12, located on the side of the light-emitting device layer 2 away from the substrate 1. This layer replaces the polarizer and reduces the panel's reflectivity. This filter layer 12 includes a black matrix 13 with multiple light-transmitting holes 14. Each light-transmitting hole 14 corresponds to a light-emitting unit 3 in a direction perpendicular to the plane of the substrate 1. Each light-emitting unit 3 is located within a corresponding light-transmitting hole 14, and light emitted by each light-emitting unit 3 is further emitted through the light-transmitting holes 14.

[0062] On one side of the light emitting unit 3 in the first direction x, the distance between the edge of the light emitting unit 3 and the edge of the corresponding light-transmitting hole 14 is a first distance.

[0063] It should be noted that the distance between the edge of the light emitting unit 3 and the edge of the corresponding light transmission hole 14 refers to the distance between the edge of the orthographic projection of the light emitting unit 3 on the substrate 1 and the edge of the corresponding light transmission hole 14 .

[0064] Because a black matrix 13 is provided in the filter layer 12, and the black matrix 13 will block a portion of the large-angle light emitted by the light-emitting unit 3, brightness attenuation will occur as the viewing angle increases. By testing the existing samples, Figure 2 is a schematic diagram of a transmittance change curve provided by an embodiment of the present invention. According to Figure 2, it can be seen that for light in the same band, its transmittance decreases significantly as the viewing angle increases. Figure 3 is another schematic diagram of a transmittance change curve provided by an embodiment of the present invention. According to Figure 3, it can be seen that the transmittance of the four existing samples at a large viewing angle is greatly reduced, and obvious brightness attenuation will occur. In this way, when the display panel displays a white picture, visual color deviation is likely to occur, resulting in a longer color deviation trajectory of the display panel. By testing the existing samples, Figure 4 is a schematic diagram of a color deviation trajectory provided by an embodiment of the present invention. According to Figure 4, it can be seen that the color deviation trajectories of the three existing samples are all long, and their color trajectory performance is poor.

[0065] To this end, in the embodiment of the present application, when designing the black matrix 13, the degree of expansion of the light-transmitting holes 14 above the different color light-emitting units 3 in the first direction x is differentiated. This allows the brightness ratio of different colors of light to be adjusted at wide viewing angles. For example, by designing the light-transmitting holes 14 above the first light-emitting unit 4 to have a greater degree of expansion in the first direction x, the degree to which the black matrix 13 blocks the wide-angle light emitted by the first light-emitting unit 4 can be significantly reduced, significantly reducing the brightness attenuation of this color of light at wide viewing angles. This allows for targeted adjustment of the brightness ratio of different colors of light at wide viewing angles, thereby achieving the goal of reducing visual color shift.

[0066] In a feasible embodiment, Figure 5 is a top view of the display panel provided in an embodiment of the present application, Figure 6 is a cross-sectional view of Figure 5 along the A1-A2 direction, Figure 7 is another top view of the display panel provided in an embodiment of the present application, and Figure 8 is a cross-sectional view of Figure 7 along the B1-B2 direction. As shown in Figures 5 to 8, the first light-emitting unit 4 includes a green light-emitting unit 15.

[0067] It is understandable that white light is formed by a mixture of red light, green light, and blue light. However, compared to red and blue light, green light contributes more to the brightness of white light, and its brightness attenuation has a greater impact on the color shift of the white screen. For this reason, the embodiment of the present application preferably chooses to expand the light-transmitting hole 14 above the green light-emitting unit 15 to a greater extent in the first direction x, so as to further reduce the black matrix 13 from blocking the large-angle green light emitted by the green light-emitting unit 15, reduce the attenuation of green light at a large viewing angle, and further reduce the risk of color shift of the white screen.

[0068] Furthermore, the second light-emitting unit 5 includes a red light-emitting unit 16 and a blue light-emitting unit 17, wherein the first distance corresponding to the red light-emitting unit 16 is greater than the first distance corresponding to the blue light-emitting unit 17. In other words, the first distance corresponding to the green light-emitting unit 15 is the largest, the first distance corresponding to the red light-emitting unit 16 is the second largest, and the first distance corresponding to the blue light-emitting unit 17 is the smallest.

[0069] When the display panel is in the off state, ambient light enters the display panel through the light-transmitting holes 14 and is reflected back by the anodes 6 in the light-emitting units 3. However, because the lifespan of light-emitting units 3 of different colors decays to varying degrees, the sizes of light-emitting units 3 of different colors are generally designed to be different. As shown in FIG7 , the blue light-emitting unit 17 is currently designed to be the largest, while the green light-emitting unit 15 is designed to be the smallest. This results in more blue ambient light entering the panel and being further reflected. This leads to a long hue trajectory when the display panel is in the off state due to the abnormal reflection ratio of the different colors of ambient light.

[0070] The above structure can reduce the amount of reflected blue ambient light by setting the outward expansion of the light-transmitting hole 14 above the blue light-emitting unit 17 in the first direction x to the minimum, thereby improving the display panel to have a better hue trajectory when the screen is off.

[0071] In one feasible embodiment, the first distances corresponding to the two opposite sides of the light-emitting unit 3 are equal. Referring to Figure 5 , the first distances corresponding to the two opposite sides of the green light-emitting unit 15 are both d1, the first distances corresponding to the two opposite sides of the red light-emitting unit 16 are both d2, and the first distances corresponding to the two opposite sides of the blue light-emitting unit 17 are both d3. Among them, d1, d2, and d3 can satisfy: d1>d2>d3. For example, the ratio of d1, d2, and d3 is 5:4:3. For example, they can be set to d1 = 5μm, d2 = 4μm, and d3 = 3μm.

[0072] With this configuration, the light-transmitting hole 14 has the same outward expansion distance on both sides in the first direction x, and the black matrix 13 blocks the wide-angle light emitted from both sides of the light-emitting unit 3 to the same extent, which helps to further optimize the wide-angle light output.

[0073] In one feasible embodiment, FIG9 is another top view of a display panel provided by an embodiment of the present invention. As shown in FIG9 , the display panel includes a data line Data, which is connected to a pixel circuit and is used to transmit a data voltage to the pixel circuit. The pixel circuit generates a driving current under the action of the data voltage to drive the light-emitting unit 3 to emit light. The first direction x is parallel to the extension direction of the data line Data.

[0074] In typical usage scenarios, when a user holds an electronic device, the vertical scanning direction of the user's viewing angle corresponds to the extension direction of the data line Data. Therefore, when the first direction x is parallel to the extension direction of the data line Data, the first direction x can be considered to correspond to a scanning direction of the user's vertical viewing angle. When a user views the screen from the user's first perspective, the vertical viewing direction of the screen is more likely to produce visual scenes than the left and right viewing directions. Therefore, setting the first direction x parallel to the extension direction of the data line Data prioritizes improving color shift in the vertical and wide viewing angles, resulting in better color trajectory performance in the vertical direction.

[0075] Alternatively, in another limiting method, referring again to FIG. 9 , a plane coordinate system is established on the plane where the display panel is located, and the orientations of 0 and 180° in the plane coordinate system are the right viewing orientation and the left viewing orientation corresponding to when the user holds the electronic device, respectively, and the orientations of 90° and 270° are the upper viewing orientation and the lower viewing orientation corresponding to when the user holds the electronic device, respectively. The first direction x can be understood as the direction of 90° or the direction of 270° in the coordinate system.

[0076] Alternatively, the first direction x can be defined based on the arrangement direction of the display area and the binding area in the display panel. For a straight-screen display panel, the binding area in the display panel is typically located below the display area. In this type of display panel, the first direction x can be understood as the arrangement direction of the display area and the binding area. For a foldable display panel, the binding area in the display panel is typically located to the right of the display area. In this type of display panel, the first direction x can be understood as a direction perpendicular to the arrangement direction of the display area and the binding area.

[0077] In a feasible embodiment, referring to FIG5 , on one side of the light emitting unit 3 in the second direction y, the distance between the edge of the light emitting unit 3 and the edge of the corresponding light-transmitting hole 14 is the second distance, and the second direction y intersects the first direction x.

[0078] The first distance corresponding to the first light-emitting unit 4 is greater than the corresponding second distance, and the first distance corresponding to the second light-emitting unit 5 is less than or equal to the corresponding second distance.

[0079] For example, referring to FIG5 , the second distances corresponding to the two opposite sides of the green light-emitting unit 15 are both m1, the second distances corresponding to the two opposite sides of the red light-emitting unit 16 are both m2, and the second distances corresponding to the two opposite sides of the blue light-emitting unit 17 are both m3. In one configuration, the first distance corresponding to the green light-emitting unit 15 is greater than the corresponding second distance, i.e., d1>m1, the first distance corresponding to the red light-emitting unit 16 is equal to the corresponding second distance, i.e., d2=m2, and the first distance corresponding to the blue light-emitting unit 17 is less than the corresponding second distance, i.e., d3<m3.

[0080] The present application further makes differentiated designs for the first distance and the second distance corresponding to the light-emitting units 3 of different colors, so that the light-emitting units 3 can achieve both weakening the color deviation and reducing the reflectivity of the panel.

[0081] Specifically, the brightness attenuation of green light significantly affects color shift more significantly. Therefore, when designing the light-transmitting aperture 14 above the green light-emitting unit 15, prioritizing its use to improve color shift in the vertical viewing angle can be considered. To address this, the first distance corresponding to the green light-emitting unit 15 can be increased, allowing the light-transmitting aperture 14 above the green light-emitting unit 15 to expand further in the vertical viewing angle direction (first direction x). Furthermore, there's no need to set the second distance corresponding to the green light-emitting unit 15 too large. By making the second distance smaller than the first distance, excessive expansion of the light-transmitting aperture 14 above the green light-emitting unit 15, which could affect the panel's reflectivity, can be avoided.

[0082] Since the brightness attenuation of red and blue light has a lesser impact on color shift, the priority when designing the light-transmitting holes 14 above the red and blue light-emitting units 16 and 17 is to utilize them to improve reflectivity. To address this, without increasing the first distances corresponding to these light-emitting units, the first distances corresponding to these units can be set to a smaller value. For example, the first distance corresponding to the blue light-emitting unit 17 can be set to be smaller than the second distance, further reducing the size of the light-transmitting hole 14 above the blue light-emitting unit 17 to further reduce the amount of blue reflected ambient light, thereby further optimizing the hue trajectory of the display panel when the screen is off.

[0083] In a feasible embodiment, on one side of the light emitting unit 3 in the second direction y, the distance between the edge of the light emitting unit 3 and the edge of the corresponding light-transmitting hole 14 is the second distance, and the second direction y intersects the first direction x.

[0084] Because viewing angle scenes are more likely to appear in the vertical viewing direction of the screen than in the horizontal viewing direction, given that the first distances corresponding to the light-emitting units 3 have been optimized, the outward extension distances of the light-transmitting holes 14 above different light-emitting units 3 in the second direction y can be designed to be equal to simplify the size design of the light-transmitting holes 14. In other words, the second distance corresponding to the first light-emitting unit 4 is equal to the second distance corresponding to the second light-emitting unit 5, that is, m1 = m2 = m3. For example, m1 = m2 = m3 = 4 μm.

[0085] It should be noted that the shapes of the light emitting units 3 shown in FIG. 5 and FIG. 7 are only for schematic illustration, and the light emitting units 3 may also be of any other shape.

[0086] For example, FIG10 is another top view of a display panel provided in an embodiment of the present application. As shown in FIG10 , the light-emitting unit 3 can be circular. In this structure, because the light-transmitting holes 14 above the light-emitting units 3 of different colors expand to different degrees in the first direction x and the second direction y, the light-transmitting holes 14 above the light-emitting units 3 of different colors can have different shapes.

[0087] For example, the light-transmitting hole 14 above the red light-emitting unit 16 is still circular, and the light-transmitting hole above the red light-emitting unit 16 expands to the same extent in the first direction x and the second direction y. The light-transmitting holes 14 above the green light-emitting unit 15 and the blue light-emitting unit 17 are elliptical. However, the light-transmitting hole 14 above the green light-emitting unit 15 expands more in the first direction x, so the major axis of the light-transmitting hole 14 above the green light-emitting unit 15 extends along the first direction x, and the minor axis extends along the second direction y. The light-transmitting hole 14 above the blue light-emitting unit 17 expands more in the second direction y, so the major axis of the light-transmitting hole 14 above the blue light-emitting unit 17 extends along the second direction y, and the minor axis extends along the first direction x.

[0088] When the light-emitting unit 3 is circular, as shown in FIG10 , the first distance can be understood as the first distance corresponding to the diameter position of the light-emitting unit 3 extending along the first direction x, and the second distance can be understood as the second distance corresponding to the diameter position of the light-emitting unit 3 extending along the second direction y. For example, m1 = m2 = m3 = d2 = 4 μm, d1 = 5 μm, and d3 = 3 μm.

[0089] Alternatively, Figure 11 is another top view of the display panel provided by an embodiment of the present application. As shown in Figure 11 , the light emitting unit 3 may also be an oblique square. In this structure, the light holes 14 above the light emitting units 3 of different colors may also have different shapes.

[0090] For example, the light-transmitting hole 14 above the red light-emitting unit 16 is still an oblique square, and the light-transmitting hole above the red light-emitting unit 16 expands to the same extent in the first direction x and the second direction y. The light-transmitting holes 14 above the green light-emitting unit 15 and the blue light-emitting unit 17 are diamond-shaped. However, the difference is that because the light-transmitting hole 14 above the green light-emitting unit 15 expands more in the first direction x, the long diagonal of the light-transmitting hole 14 above the green light-emitting unit 15 extends along the first direction x, and the short diagonal extends along the second direction y. The light-transmitting hole 14 above the blue light-emitting unit 17 expands more in the second direction y, so the long diagonal of the light-transmitting hole 14 above the blue light-emitting unit 17 extends along the second direction y, and the short diagonal extends along the first direction x.

[0091] When the light-emitting unit 3 is shaped like an oblique square, as shown in FIG11 , the first distance can be understood as the first distance corresponding to the diagonal position of the light-emitting unit 3 extending along the first direction x, and the second distance can be understood as the second distance corresponding to the diagonal position of the light-emitting unit 3 extending along the second direction y. For example, m1 = m2 = m3 = d2 = 4 μm, d1 = 5 μm, and d3 = 3 μm.

[0092] To further optimize the light emission of the light emitting unit 3 , the geometric center of the light-transmitting hole 14 may coincide with the geometric center of the corresponding light emitting unit 3 in a direction perpendicular to the plane of the substrate 1 .

[0093] In a feasible embodiment, Figure 12 is another structural schematic diagram provided in an embodiment of the present application. As shown in Figure 12, the filter layer 12 also includes a filter structure 20, and the filter structure 20 includes a filter unit 21. The filter unit 21 corresponds one-to-one to the light-transmitting hole 14, and the filter unit 21 is located in the corresponding light-transmitting hole 14.

[0094] The filter unit 21 includes a first portion 22 and a second portion 23 . The second portion 23 is located on a side of the first portion 22 close to an edge of the light-transmitting hole 14 . The thickness of the second portion 23 is smaller than that of the first portion 22 .

[0095] In a conventional design, the filter unit 21 has a uniform thickness. FIG13 is a schematic diagram illustrating a light transmission comparison provided in an embodiment of the present application. As shown in FIG13 , in this design, light emitted by the light-emitting unit 3 and transmitted along the normal viewing angle is emitted perpendicularly to the filter unit 21. The transmission distance L1 of this light in the filter unit 21 is equal to the thickness of the filter unit 21 in a direction perpendicular to the plane of the substrate 1. In contrast, light emitted by the light-emitting unit 3 and transmitted along the wide viewing angle is emitted obliquely through the filter unit 21. The transmission distance L2 of this light in the filter unit 21 is greater than the thickness of the filter unit 21 in a direction perpendicular to the plane of the substrate 1. This results in severe light absorption, causing brightness differences in the display panel at different viewing angles and increasing the risk of color shift.

[0096] In this regard, the embodiment of the present application has differentiated the film thickness of the middle part and the edge part of the filter unit 21 to reduce the transmission distance L2 of the large-viewing angle light in the filter unit 21 when it passes through the filter unit 21 obliquely, so that the optical path of the obliquely transmitted light tends to the optical path of the vertically transmitted light, thereby weakening the brightness difference under different viewing angles.

[0097] Furthermore, referring again to FIG. 12 , the display panel further includes an encapsulation layer 24, which is located between the light-emitting device layer 2 and the filter layer 12 and is used to provide a thin-film encapsulation of the light-emitting device layer 2 to prevent water and oxygen from penetrating. Specifically, the encapsulation layer 24 may include a first inorganic encapsulation layer 25, an organic encapsulation layer 26, and a second inorganic encapsulation layer 27, which are stacked.

[0098] The display panel also includes a touch function layer 28, located between the encapsulation layer 24 and the filter layer 12, for implementing touch functionality. The touch function layer 28 specifically includes a first insulating layer 29, touch electrodes 30, a second insulating layer 31, and a glue layer 32, which are stacked. The glue layer 32 is adjacent to the filter layer 12 and has a recess, with the filter units 21 located within the recess. Specifically, after forming the glue layer 32, a photolithography process, such as a halftone mask process, is used to form the recess in the glue layer 32. When the filter layer 12 is subsequently formed, the filter material fills the recess, thereby enabling the filter units 21 to have non-uniform thicknesses.

[0099] This structure utilizes the display panel's existing film layers to support the filter unit 21, eliminating the need for additional supporting film layers and thus maintaining the module's original thickness. Furthermore, compared to other film layers such as the inorganic encapsulation layer and the insulation layer, the adhesive layer 32 is thicker, thus minimizing restrictions on the design of the recess depth. For example, a deeper recess can be formed, resulting in a greater difference in film thickness between the first portion 22 and the second portion 23.

[0100] In addition, the display panel may further include an array layer 33 . The array layer 33 is located between the substrate 1 and the light-emitting device layer 2 . The array layer 33 may specifically include structures such as pixel circuits and data lines Data.

[0101] In a feasible embodiment, Figure 14 is another structural schematic diagram of the display panel provided by an embodiment of the present invention. As shown in Figure 14, the film thickness of the first part 22 at different positions is equal, and in the direction perpendicular to the plane where the substrate 1 is located, the geometric center of the first part 22 coincides with the geometric center of the light-emitting unit 3 overlapping with it. At this time, the vertically transmitted light emitted from the middle of the light-emitting unit 3 is emitted through the first part 22 with uniform thickness, the optical path is equal, and the light output effect at the positive viewing angle is better.

[0102] Further, referring to FIG. 14 again, for the overlapping first portion 22 and the light emitting unit 3 , in the same direction, the size of the first portion 22 is greater than or equal to 50% and less than or equal to 120% of the size of the light emitting unit 3 .

[0103] Exemplarily, for the overlapping first portion 22 and the light-emitting unit 3: in the first direction x, the size of the first portion 22 is greater than or equal to 50% of the size of the light-emitting unit 3 and less than or equal to 120% of the size of the light-emitting unit 3, for example, 60% of the size of the light-emitting unit 3; and / or, in the second direction y, the size of the first portion 22 is also greater than or equal to 50% of the size of the light-emitting unit 3 and less than or equal to 120% of the size of the light-emitting unit 3, for example, 60% of the size of the light-emitting unit 3.

[0104] If the first portion 22 is too small, the optical paths of the light beams transmitted vertically within the filter unit 21 will differ significantly, affecting the light output at normal viewing angles. If the first portion 22 is too large, the size of the light-transmitting apertures 14 will need to be increased, which may affect the arrangement of the apertures 14 and reduce the pixel density. The above structure, however, achieves both normal viewing angle light output and a higher pixel density.

[0105] In one feasible embodiment, referring again to FIG. 14 , the angle A between the bottom surface of the second portion 23 proximal to the substrate 1 and the plane of the substrate 1 is less than 45°. This allows for a smooth thickness transition from the center to the sides of the filter unit 21, optimizing light extraction. In one configuration, A = 30°. Alternatively, in another configuration, A < 25°.

[0106] In a feasible embodiment, in combination with Figures 15 to 18, on one side of the first direction x of the first part 22, the distance between the edge of the second part 23 and the edge of the first part 22 is a third distance, and on one side of the second direction y of the first part 22, the distance between the edge of the second part and the edge of the first part is a fourth distance, and the second direction y intersects with the first direction x.

[0107] Among them, for the filter unit 21 corresponding to the first light-emitting unit 4, the third distance corresponding to the filter unit 21 is greater than the corresponding fourth distance; for the filter unit 21 corresponding to the second light-emitting unit 5, the third distance corresponding to the filter unit 21 is less than or equal to the corresponding fourth distance.

[0108] Taking the light-emitting unit 3 as a circle as an example, Figure 15 is another top view of the display panel provided in an embodiment of the present application, and Figure 16 is a cross-sectional view of Figure 15 along the C1-C2 direction. Combining Figures 15 and 16, for the filter unit 21 corresponding to the green light-emitting unit 15, the third distance corresponding to the filter unit 21 is k1, and the corresponding fourth distance is h1, k1>h1.

[0109] Because the brightness attenuation of green light has a significantly greater impact on color deviation, when designing the filter unit 21 corresponding to the green light-emitting unit 15, the unequal thickness range of this part of the filter unit 21 in the first direction x can be designed to be larger, so as to reduce the optical path of the green light obliquely transmitted in the upper and lower viewing angles (first direction) to a greater extent, optimize the light output of the green light-emitting unit 15 in the upper and lower viewing angles, and improve the color deviation phenomenon in the upper and lower large viewing angles to a greater extent.

[0110] Figure 17 is a cross-sectional view of Figure 15 along the D1-D2 direction. Combining Figures 15 and 17, for the filter unit 21 corresponding to the red light-emitting unit 16, the third distance corresponding to the filter unit 21 is k2, and the fourth distance corresponding to the filter unit 21 is h2, where k2 = h2. Figure 18 is a cross-sectional view of Figure 15 along the E1-E2 direction. Combining Figures 15 and 18, for the filter unit 21 corresponding to the blue light-emitting unit 17, the third distance corresponding to the filter unit 21 is k3, and the fourth distance corresponding to the filter unit 21 is h3, where k3 < h3.

[0111] Since the brightness attenuation of red light and blue light has a smaller impact on color deviation, when designing the filter unit 21 corresponding to the red light-emitting unit 16 and the blue light-emitting unit 17, the unequal thickness range of this part of the filter unit 21 in the first direction x can be designed to be smaller, so that the filter unit 21 can achieve a greater anti-reflection effect, which helps to reduce the panel reflectivity to a greater extent.

[0112] It should be noted that the size relationship between the third distance and the fourth distance of the filter unit 21 corresponding to the light emitting unit 3 can be achieved by designing the size of the light-transmitting holes 14 corresponding to different light emitting units 3 .

[0113] For example, assuming that the light-emitting unit 3 is circular, the first portion 22 is also circular, and the geometric center of the first portion 22 coincides with the geometric center of the light-emitting unit 3. For the green light-emitting unit 15, since the light-transmitting aperture 14 above it expands more in the first direction x, the third distance between the filter unit 21 and the green light-emitting unit 15 will be greater than the fourth distance. For the blue light-emitting unit 17, since the light-transmitting aperture 14 above it expands more in the second direction y, the third distance between the filter unit 21 and the blue light-emitting unit 17 will be less than the fourth distance.

[0114] Furthermore, for the green light emitting unit 15 and the blue light emitting unit 17 , the difference between the third distance and the fourth distance corresponding to the filter unit 21 can be further adjusted by adjusting the size of the first portion 22 in the first direction x and the second direction y.

[0115] Taking the circular light-emitting unit 3 as an example, the filter unit 21 corresponding to the green light-emitting unit 15 can be designed as an elliptical shape, with its dimension in the first direction x being smaller than its dimension in the second direction y, to further increase the third distance. Similarly, the filter unit 21 corresponding to the blue light-emitting unit 17 can also be designed as an elliptical shape, with its dimension in the second direction y being smaller than its dimension in the first direction x, to further increase the fourth distance.

[0116] In one feasible embodiment, FIG19 is a schematic diagram of another structure of a display panel provided in an embodiment of the present application. As shown in FIG19 , a filter structure 20 includes a semi-transmissive optical adhesive material. In a direction perpendicular to the plane of the substrate 1, the filter structure 20 covers the light-emitting device layer 2. The transmittance TR of the semi-transmissive optical adhesive material can satisfy the following conditions: 40% ≤ TR ≤ 65%, thereby effectively filtering ambient light and reducing the reflectivity of the panel.

[0117] This filter layer 12 has a simple structure, requiring only two process steps to form the black matrix 13 and filter structure 20, significantly reducing the process flow and cost. Furthermore, the filter structure 20 can be bonded to an upper cover plate and other structures without the need for an additional optical adhesive layer.

[0118] Of course, in other optional embodiments of the present application, as shown in FIG1 , the filter structure 20 may also include a color-resistance material. Specifically, the filter unit 21 above the red light-emitting unit 16 includes a red color-resistance material for transmitting red light, the filter unit 21 above the green light-emitting unit 15 includes a green color-resistance material for transmitting green light, and the filter unit 21 above the blue light-emitting unit 17 includes a blue color-resistance material for transmitting blue light.

[0119] Based on the same inventive concept, an embodiment of the present invention further provides an electronic device. FIG20 is a schematic structural diagram of an electronic device provided by an embodiment of the present invention. As shown in FIG20 , the electronic device includes the above-mentioned display panel 100. The specific structure of the display panel 100 has been described in detail in the above-mentioned embodiment and will not be repeated here. Of course, the electronic device shown in FIG20 is merely for illustration. The electronic device can be any device with a display function, such as a mobile phone, a tablet computer, a laptop computer, an e-reader, or a television.

[0120] In this specification, reference can be made to the same or similar parts between the various embodiments. In particular, for the device embodiment and the terminal embodiment, since they are basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description in the method embodiment.

Claims

1. A display panel, characterized in that: include: substrate; a light-emitting device layer, located on one side of the substrate, the light-emitting device layer including a plurality of light-emitting units, the light-emitting units including a first light-emitting unit and a second light-emitting unit emitting light of different colors; a filter layer located on a side of the light-emitting device layer away from the substrate, the filter layer comprising a black matrix having a plurality of light-transmitting holes, wherein the light-transmitting holes correspond one-to-one to the light-emitting units in a direction perpendicular to the plane of the substrate, and the light-emitting units are located in corresponding light-transmitting holes; On one side of the light-emitting unit in the first direction, the distance between the edge of the light-emitting unit and the edge of the corresponding light-transmitting hole is a first distance, wherein the first distance corresponding to the first light-emitting unit is greater than the first distance corresponding to the second light-emitting unit.

2. The display panel according to claim 1, wherein: The first light emitting unit includes a green light emitting unit.

3. The display panel according to claim 2, wherein: The second light emitting unit includes a red light emitting unit and a blue light emitting unit, and the first distance corresponding to the red light emitting unit is greater than the first distance corresponding to the blue light emitting unit.

4. The display panel according to claim 1, wherein: The first distances corresponding to two opposite sides of the light emitting unit are equal.

5. The display panel according to claim 1, wherein: The display panel further includes data lines, and the first direction is parallel to an extending direction of the data lines.

6. The display panel according to claim 1, wherein: On one side of the light-emitting unit in the second direction, the distance between the edge of the light-emitting unit and the edge of the light-transmitting hole corresponding thereto is a second distance, and the second direction intersects with the first direction; The first distance corresponding to the first light-emitting unit is greater than the corresponding second distance, and the first distance corresponding to the second light-emitting unit is less than or equal to the corresponding second distance.

7. The display panel according to claim 1, wherein: On one side of the light-emitting unit in the second direction, the distance between the edge of the light-emitting unit and the edge of the light-transmitting hole corresponding thereto is a second distance, and the second direction intersects with the first direction; The second distance corresponding to the first light-emitting unit is equal to the second distance corresponding to the second light-emitting unit.

8. The display panel according to claim 1, wherein: The filter layer further includes a filter structure, wherein the filter structure includes filter units, the filter units correspond to the light transmission holes one by one, and the filter units are located in the corresponding light transmission holes; The filter unit includes a first part and a second part, wherein the second part is located on a side of the first part close to an edge of the light-transmitting hole, wherein a film thickness of the second part is smaller than a film thickness of the first part.

9. The display panel according to claim 8, wherein: The display panel further includes: an encapsulation layer, located between the light-emitting device layer and the filter layer; The touch function layer is located between the encapsulation layer and the filter layer. The touch function layer includes a touch electrode and a glue layer. The glue layer is adjacent to the filter unit and has a recess. The filter unit is located in the recess.

10. The display panel according to claim 8, wherein The film thickness of the first portion at different positions is equal, and in a direction perpendicular to the plane where the substrate is located, the geometric center of the first portion coincides with the geometric center of the light-emitting unit overlapping with the first portion.

11. The display panel according to claim 10, wherein: For the overlapping first portion and the light emitting unit, in the same direction, a size of the first portion is greater than or equal to 50% and less than or equal to 120% of a size of the light emitting unit.

12. The display panel according to claim 8, wherein An angle between a bottom surface of the second portion close to the substrate and a plane where the substrate is located is less than 45°.

13. The display panel according to claim 8, wherein On one side of the first portion in the first direction, the distance between the edge of the second portion and the edge of the first portion is a third distance; on one side of the first portion in the second direction, the distance between the edge of the second portion and the edge of the first portion is a fourth distance; and the second direction intersects the first direction; Wherein, for the filter unit corresponding to the first light-emitting unit, the third distance corresponding to the filter unit is greater than the corresponding fourth distance; For the filter unit corresponding to the second light-emitting unit, the third distance corresponding to the filter unit is less than or equal to the corresponding fourth distance.

14. The display panel according to claim 8, wherein The light filtering structure includes a semi-transmissive optical adhesive material, and in a direction perpendicular to the plane where the substrate is located, the light filtering structure covers the light emitting device layer.

15. An electronic device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 14.

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