Display panel and electronic equipment

Abstract

The embodiment of the invention provides a display panel and electronic equipment, relates to the field of display, and aims to improve visual angle color cast. The display panel includes: a substrate; the light-emitting device layer is located on one side of the substrate, the light-emitting device layer comprises a plurality of light-emitting units, and each light-emitting unit comprises a first light-emitting unit and a second light-emitting unit which emit light of different colors; the light filtering layer is located on the side, away from the substrate, of the light emitting device layer and comprises a black matrix, the black matrix is provided with a plurality of light transmitting holes, the light transmitting holes correspond to the light emitting units in a one-to-one mode in the direction perpendicular to the plane where the substrate is located, and the light emitting units are located in the corresponding light transmitting holes; on one side of the first direction of the light-emitting unit, the distance between the edge of the light-emitting unit and the edge of the light-transmitting hole corresponding to the light-emitting unit is a first distance, and the first distance corresponding to the first light-emitting unit is larger than the first distance corresponding to the second light-emitting unit.

Description

Technical Field

[0001] This application relates to the field of display technologies, and more particularly to a display panel and an electronic device. Background Art

[0002] Organic Light-Emitting Diode (OLED) display panels have been widely used in various display fields due to their many advantages such as self-luminescence, high luminous efficiency, and short response time.

[0003] Currently, most OLED display panels adopt a technology of removing polarizers, using a filter layer to replace the polarizer to achieve the purpose of reducing the reflectivity. However, such display panels have relatively obvious viewing angle color shift problems, resulting in poor display effects. Summary of the Invention

[0004] In view of this, this application provides a display panel and an electronic device to improve the viewing angle color shift.

[0005] In a first aspect, an embodiment of this application provides a display panel, including: a 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, and the light-emitting units including a first light-emitting unit and a second light-emitting unit that emit different color lights; a filter layer located on the side of the light-emitting device layer away from the substrate, the filter layer including a black matrix, the black matrix having a plurality of light-transmitting holes, in a direction perpendicular to the plane where the substrate is located, the light-transmitting holes correspond to the light-emitting units one by one, and the light-emitting units are located within the corresponding light-transmitting holes. On one side of the first 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 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.

[0006] When designing the black matrix in the embodiment of this application, a differential design is carried out on the degree of outward expansion of the light-transmitting holes above different color light-emitting units in the first direction, so that the brightness ratio of different color lights at a large viewing angle can be adjusted. For example, by designing the degree of outward expansion of the light-transmitting hole above the first light-emitting unit in the first direction to be larger, the blocking degree of the black matrix on the large-angle light emitted by the first light-emitting unit can be greatly reduced, and the brightness attenuation of this color light at a large viewing angle can be significantly reduced. Furthermore, the brightness ratio of different color lights at a large viewing angle can be adjusted specifically to achieve the purpose of weakening the viewing angle color shift.

[0007] In a feasible implementation manner, the first light-emitting unit includes a green light-emitting unit.

[0008] Compared with red light 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. Therefore, in the embodiments of the present application, the light-transmitting holes above the green light-emitting units are preferably expanded to a greater extent in the first direction, so as to reduce the blocking of the large-angle green light emitted by the green light-emitting units by the black matrix to a greater extent, reduce the attenuation of the green light at a large viewing angle, and reduce the risk of color shift of the white screen.

[0009] Further, 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.

[0010] In the off-screen state of the display panel, ambient light will enter the display panel through the light-transmitting holes and be reflected back by the anode in the light-emitting unit 3. However, due to the different degrees of lifetime attenuation of different color light-emitting units, the sizes of different color light-emitting units are generally designed to be different at present. Currently, the size of the blue light-emitting unit is more often designed to be the largest, and the size of the green light-emitting unit is designed to be the smallest. This will cause more blue ambient light to enter the panel and be further reflected out, resulting in the problem of a long hue trajectory of the display panel in the off-screen state due to abnormal reflection ratios of different color ambient lights.

[0011] By setting the expansion degree of the light-transmitting holes above the blue light-emitting units in the first direction to be the smallest, the above structure can reduce the amount of reflected blue ambient light, and thus can improve the hue trajectory of the display panel in the off-screen state to be more excellent.

[0012] In a feasible implementation manner, the first distances corresponding to the opposite sides of the light-emitting unit are equal. At this time, the expansion distances of the light-transmitting holes on both sides of the light-emitting unit in the first direction are the same, and the blocking degrees of the black matrix on the large-angle light rays emitted from the opposite sides of the light-emitting unit are consistent, which helps to optimize the light-emitting performance of the light-emitting unit at the off-side viewing angle.

[0013] In a feasible implementation manner, 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, in the user's first viewing angle, the vertical viewing angle direction of the screen is more likely to present a viewing angle scene than the horizontal viewing angle direction. Setting the first direction to be parallel to the extension direction of the data lines can preferentially focus on improving the color shift phenomenon in the vertical large viewing angle direction, so that the vertical direction has a more excellent color trajectory performance.

[0014] In a feasible implementation, 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; 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.

[0015] The present application further makes a differential design of the first distance and the second distance corresponding to different color light-emitting units themselves, so that the light-emitting unit can take into account the realization of weakening color deviation and reducing the panel reflectivity.

[0016] Specifically, the influence degree of the brightness attenuation of green light on color deviation is significantly greater. Therefore, when designing the light-transmitting hole above the green light-emitting unit, priority can be given to considering how to use it to improve the color deviation in the up-and-down viewing direction. In this regard, the first distance corresponding to the green light-emitting unit can be preferentially increased, so that the light-transmitting hole above the green light-emitting unit expands more in the up-and-down viewing direction (the first direction). Further, it is not necessary to set the second distance corresponding to the green light-emitting unit too large. By making the second distance less than the first distance, it is possible to avoid the overall expansion of the light-transmitting hole above the green light-emitting unit being too large and affecting the panel reflectivity.

[0017] Since the influence degree of the brightness attenuation of red light and blue light on color deviation is small, when designing the light-transmitting holes above the red light-emitting unit and the blue light-emitting unit, priority can be given to considering how to use them to improve the reflectivity. In this regard, without additionally increasing the first distance corresponding to this part of the light-emitting units, the first distance corresponding to this part of the light-emitting units can be set smaller, for example, the first distance corresponding to the blue light-emitting unit can be set to be less than the second distance, further reducing the size of the light-transmitting hole above the blue light-emitting unit, so as to reduce the amount of blue reflected ambient light to a greater extent, which is more conducive to optimizing the hue trajectory of the display panel in the off-screen state.

[0018] In a feasible implementation, 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. Since the up-and-down direction of the screen is more likely to present a viewing angle scenario than the left-and-right direction, under the premise that the first distance corresponding to the light-emitting unit has been optimized in the embodiments of the present application, the outward expansion distance of the light-transmitting holes above different light-emitting units in the second direction can be designed to be equal to simplify the size design of the light-transmitting holes. That is, the second distance corresponding to the first light-emitting unit is equal to the second distance corresponding to the second light-emitting unit.

[0019] In a feasible implementation manner, the light filtering layer further includes a light filtering structure. The light filtering structure includes light filtering units, and the light filtering units correspond to the light transmitting holes one by one, and the light filtering units are located in the corresponding light transmitting holes. Each light filtering unit includes a first part and a second part, and the second part is located on a side of the first part close to the edge of the light transmitting hole. Herein, the film thickness of the second part is smaller than that of the first part, so as to reduce the transmission distance of the large-angle light rays when obliquely passing through the light filtering unit, make the optical path of the obliquely transmitted light rays tend to be the same as that of the vertically transmitted light rays, and weaken the brightness difference at different viewing angles.

[0020] Further, the display panel further includes: an encapsulation layer located between the light emitting device layer and the light filtering layer; a touch control function layer located between the encapsulation layer and the light filtering layer. The touch control function layer includes touch control electrodes and an adhesive layer. Herein, the adhesive layer is adjacent to the light filtering units, and the adhesive layer has recesses, and the light filtering units are located in the recesses.

[0021] This structure uses the original film layers in the display panel to carry the light filtering units, without adding other carrier film layers, so it will not affect the original thickness of the module. Moreover, compared with other film layers such as an inorganic encapsulation layer and an insulating layer, the adhesive layer has a greater thickness, so the limitation on the design of the recess depth is smaller. For example, a recess with a greater depth can be formed to make a greater film thickness difference between the first part and the second part.

[0022] In a feasible implementation manner, the film thicknesses of the first part at different positions are equal, and in a direction perpendicular to the plane where the substrate is located, the geometric center of the first part coincides with the geometric center of the light emitting unit overlapping therewith. In this way, the vertically transmitted light emitted from the middle of the light emitting unit can pass through the first part with a uniform thickness, and their optical paths are equal, and the light emitting effect at the front viewing angle is better.

[0023] In a feasible implementation manner, for the overlapping first part and the light emitting unit, in the same direction, the size of the first part is greater than or equal to 50% and less than or equal to 120% of the size of the light emitting unit.

[0024] If the size of the first part is too small, the optical path differences of more vertically transmitted light rays in the light filtering unit are relatively large, which will affect the light emitting difference at the front viewing angle. If the size of the first part is too large, the size of the light transmitting hole needs to be increased accordingly, which may affect the arrangement between the light transmitting holes and the pixel density needs to be reduced. The above structure can take into account both the light emitting effect at the front viewing angle and a relatively high pixel arrangement density.

[0025] In a feasible implementation manner, the included angle between the bottom surface of the second part close to the substrate and the plane where the substrate is located is less than 45°, so that the light filtering unit has a gentle thickness transition from the middle to both sides, optimizing the light emitting effect.

[0026] In a feasible implementation, on one side of the first part in the first direction, the distance between the edge of the second part and the edge of the first part is the third distance, and on one side of the first part in the second direction, the distance between the edge of the second part and the edge of the first part is the fourth distance, where the second direction intersects the first direction.

[0027] 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.

[0028] Since the influence degree of the brightness attenuation of green light on color deviation is significantly greater, when designing the filter unit corresponding to the green light-emitting unit, the unequal thickness range of this part of the filter unit in the first direction can be designed to be larger, so as to reduce the optical path of the green light transmitted obliquely in the up and down viewing directions (the first direction) to a greater extent, optimize the light output of the green light-emitting unit in the up and down viewing directions, and improve the color deviation phenomenon in the up and down large viewing directions to a greater extent. And since the influence degree of the brightness attenuation of red light and blue light on color deviation is smaller, when designing the filter units corresponding to the red light-emitting unit and the blue light-emitting unit, the unequal thickness range of these parts of the filter units in the first direction can be designed to be smaller, so that the filter unit can achieve a greater anti-reflection effect, which helps to reduce the panel reflectivity to a greater extent.

[0029] In a feasible implementation, the filter structure includes a semi-transparent optical adhesive material, and in the direction perpendicular to the plane where the substrate is located, the filter structure covers the light-emitting device layer. This kind of filter layer has a simple structure and only needs two process steps to form the black matrix and the filter structure respectively, which greatly reduces the process flow and process cost. Moreover, the filter structure can also realize the bonding and fixing with the upper cover plate and other structures, and there is no need to additionally set an optical adhesive layer.

[0030] In a second aspect, based on the same inventive concept, an embodiment of the present application further provides an electronic device, including the above display panel, and the electronic device can have a better color locus. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0032] Figure 1 FIG. 21 is a schematic structural diagram of a display panel provided by an embodiment of the present application;

[0033] Figure 2A schematic diagram of the transmittance change curve provided by an embodiment of the present invention;

[0034] Figure 3 Another schematic diagram of the transmittance change curve provided by an embodiment of the present invention;

[0035] Figure 4 A schematic diagram of the color shift locus provided by an embodiment of the present invention;

[0036] Figure 5 A top view of a display panel provided by an embodiment of the present application;

[0037] Figure 6 is Figure 5 A cross-sectional view along the A1-A2 direction;

[0038] Figure 7 Another top view of a display panel provided by an embodiment of the present application;

[0039] Figure 8 is Figure 7 A cross-sectional view along the B1-B2 direction;

[0040] Figure 9 Another top view of a display panel provided by an embodiment of the present invention;

[0041] Figure 10 Another top view of a display panel provided by an embodiment of the present application;

[0042] Figure 11 Another top view of a display panel provided by an embodiment of the present application;

[0043] Figure 12 Another structural schematic diagram provided by an embodiment of the present application;

[0044] Figure 13 A schematic diagram of light transmission comparison provided by an embodiment of the present application;

[0045] Figure 14 Another structural schematic diagram of a display panel provided by an embodiment of the present invention;

[0046] Figure 15 Another top view of a display panel provided by an embodiment of the present application;

[0047] Figure 16 is Figure 15 A cross-sectional view along the C1-C2 direction;

[0048] Figure 17 is Figure 15 A cross-sectional view along the D1-D2 direction;

[0049] Figure 18 is Figure 15 a cross-sectional view along the E1-E2 direction;

[0050] Figure 19 is another structural schematic diagram of the display panel provided by the embodiment of the present application;

[0051] Figure 20 is a structural schematic diagram of the electronic device provided by the embodiment of the present invention. Specific embodiments

[0052] In order to better understand the technical solution of the present application, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0053] It should be clear that the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0054] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms of "a", "the" and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0055] It should be understood that the term " / and / " used herein is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, a and / or b can represent: a exists alone, a and b exist simultaneously, and b exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0056] The embodiment of the present application provides a display panel, which may specifically be an OLED display panel.

[0057] Figure 1 is a structural schematic diagram of the display panel provided by the embodiment of the present application. As Figure 1 shown, the display panel includes a substrate 1 and a light-emitting device layer 2. Among them, the light-emitting device layer 2 is located on one side of the substrate 1. The light-emitting device layer 2 includes a plurality of light-emitting units 3, and the light-emitting unit 3 includes a first light-emitting unit 4 and a second light-emitting unit 5 that emit light of different colors.

[0058] 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 further includes a pixel definition layer 9, and the pixel definition layer 9 is used to define a pixel opening area 10 and a non-opening area 11, and the position where the light-emitting unit 3 is located corresponds to the pixel opening area 10.

[0059] The display panel further includes a light filtering layer 12, which is located on the side of the light-emitting device layer 2 away from the substrate 1 and is used to replace the polarizer to reduce the reflectivity of the panel. The light filtering layer 12 includes a black matrix 13, and the black matrix 13 has a plurality of light-transmitting holes 14. In the direction perpendicular to the plane where the substrate 1 is located, the light-transmitting holes 14 correspond to the light-emitting units 3 one by one, and the light-emitting units 3 are located in the corresponding light-transmitting holes 14, and the light emitted by the light-emitting units 3 will further pass through the light-transmitting holes 14 and emit out.

[0060] 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 the first distance. Among them, the first distance corresponding to the first light-emitting unit 4 is greater than the first distance corresponding to the second light-emitting unit 5.

[0061] It should be noted that the distance between the edge of the light-emitting unit 3 and the edge of the corresponding light-transmitting 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-transmitting hole 14.

[0062] Since the black matrix 13 is provided in the light filtering layer 12, and the black matrix 13 will block a part of the large-angle light emitted by the light-emitting unit 3, the brightness attenuation will occur as the viewing angle increases. By testing the existing samples, Figure 2 is a schematic diagram of the transmittance change curve provided by the embodiment of the present invention. According to Figure 2 it can be seen that for the light of the same wavelength band, as the viewing angle increases, its transmittance decreases significantly. Figure 3 is another schematic diagram of the transmittance change curve provided by the embodiment of the present invention. According to Figure 3 it can be seen that the transmittance of the existing four samples decreases significantly at large viewing angles, and obvious brightness attenuation will occur. In this way, when the display panel displays a white picture, the phenomenon of viewing angle color shift is likely to occur, resulting in a long color shift trajectory of the display panel. By testing the existing samples, Figure 4 is a schematic diagram of the color shift trajectory provided by the embodiment of the present invention. According to Figure 4 it can be seen that the color shift trajectories of the existing three samples are all long, and their color trajectories perform poorly.

[0063] Therefore, when designing the black matrix 13 in the embodiments of the present application, a differential design is carried out on the degree of outward expansion of the light-transmitting holes 14 above the light-emitting units 3 of different colors in the first direction x, so that the brightness ratio of lights of different colors at a large viewing angle can be adjusted. For example, by designing the degree of outward expansion of the light-transmitting hole 14 above the first light-emitting unit 4 in the first direction x to be larger, the degree of occlusion of the large-angle light emitted by the first light-emitting unit 4 by the black matrix 13 can be greatly reduced, and the brightness attenuation of this color of light at a large viewing angle can be significantly reduced. Furthermore, the brightness ratio of lights of different colors at a large viewing angle can be adjusted specifically to achieve the purpose of weakening the viewing angle color shift.

[0064] In a feasible implementation manner, Figure 5 is a top view of a display panel provided by an embodiment of the present application, Figure 6 is Figure 5 a cross-sectional view along the A1-A2 direction, Figure 7 is another top view of a display panel provided by an embodiment of the present application, Figure 8 is Figure 7 a cross-sectional view along the B1-B2 direction, as Figures 5 to 8 shown, the first light-emitting unit 4 includes a green light-emitting unit 15.

[0065] It can be understood that white light is formed by mixing red light, green light, and blue light. However, compared with red light and blue light, green light contributes more to the brightness of white light, and the influence of its brightness attenuation on the color shift of the white screen is also greater. Therefore, in the embodiments of the present application, the light-transmitting hole 14 above the green light-emitting unit 15 is preferentially expanded to a greater extent in the first direction x to reduce the occlusion of the large-angle green light emitted by the green light-emitting unit 15 by the black matrix 13 to a greater extent and reduce the attenuation degree of the green light at a large viewing angle, so as to further reduce the risk of color shift of the white screen.

[0066] Furthermore, the second light-emitting unit 5 includes a red light-emitting unit 16 and a blue light-emitting unit 17, where 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. That is to say, 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.

[0067] In the off-screen state of the display panel, ambient light will enter the display panel through the light-transmitting hole 14 and be reflected back by the anode 6 in the light-emitting unit 3. However, due to the different degrees of lifetime attenuation of the light-emitting units 3 of different colors, the sizes of the light-emitting units 3 of different colors are generally designed to be different at present. Refer to Figure 7, currently, the size of the blue light-emitting unit 17 is mostly designed to be the largest, and the size of the green light-emitting unit 15 is designed to be the smallest. This will cause more blue ambient light to enter the panel and be further reflected out, resulting in the problem of a long hue trajectory of the display panel in the off-screen state due to abnormal reflection ratios of different colors of ambient light.

[0068] In the above structure, by setting the degree of outward expansion of the light-transmitting hole 14 above the blue light-emitting unit 17 in the first direction x to be the smallest, the amount of reflected blue ambient light can be reduced, and thus the hue trajectory of the display panel in the off-screen state can be improved.

[0069] In a feasible implementation manner, the first distances corresponding to the two opposite sides of the light-emitting unit 3 are equal. Refer 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. Exemplarily, the proportional relationship of d1, d2, and d3 is 5:4:3. For example, it can be set as d1 = 5μm, d2 = 4μm, and d3 = 3μm.

[0070] With such a setting, the outward expansion distances on both sides of the light-transmitting hole 14 in the first direction x are the same, and the black matrix 13 has the same degree of blocking of the large-angle light rays emitted from both sides of the light-emitting unit 3, which helps to further optimize the light output at large viewing angles.

[0071] In a feasible implementation manner, Figure 9 is another top view of the display panel provided by the embodiment of the present invention. As Figure 9 shown, the display panel includes a data line Data, which is connected to the pixel circuit and 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. Among them, the first direction x is parallel to the extension direction of the data line Data.

[0072] In a conventional usage scenario, when a user holds an electronic device, the scanning direction of the up-and-down viewing angle is 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, it can be considered that the first direction x corresponds to a scanning direction of the user's up-and-down viewing angle. When the user views the screen, in the user's first viewing angle, the up-and-down viewing angle direction of the screen is more likely to present a viewing angle scenario than the left-and-right viewing angle direction. Therefore, setting the first direction x to be parallel to the extension direction of the data line Data can preferentially focus on improving the color deviation phenomenon in the up-and-down large viewing angle direction, so that the up-and-down direction has a better color trajectory performance.

[0073] Or, in another limiting manner, refer to againFigure 9 , a plane coordinate system is established on the plane where the display panel is located. The azimuths of 0 and 180° in the plane coordinate system are the right viewing angle azimuth and the left viewing angle azimuth corresponding to when the user holds the electronic device, respectively. The azimuths of 90° and 270° are the upper viewing angle azimuth and the lower viewing angle azimuth corresponding to when the user holds the electronic device, respectively. The first direction x can be understood as the direction of 90° or 270° in the coordinate system.

[0074] Alternatively, the first direction x can also be defined according to the arrangement direction of the display area and the binding area in the display panel. For a straight display panel, the binding area in the display panel is usually set on the lower side of the display area. The first direction x in this type of display panel 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 usually set on the right side of the display area. The first direction x in this type of display panel can be understood as the direction perpendicular to the arrangement direction of the display area and the binding area.

[0075] In a feasible implementation manner, refer to Figure 5 , on one side of the second direction y of the light-emitting unit 3, 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 with the first direction x.

[0076] Among them, 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.

[0077] Exemplarily, refer to Figure 5 , the second distances corresponding to the opposite sides of the green light-emitting unit 15 are both m1, the second distances corresponding to the opposite sides of the red light-emitting unit 16 are both m2, and the second distances corresponding to the opposite sides of the blue light-emitting unit 17 are both m3. In a setting manner, the first distance corresponding to the green light-emitting unit 15 is greater than the corresponding second distance, that is, d1 > m1, the first distance corresponding to the red light-emitting unit 16 is equal to the corresponding second distance, that is, d2 = m2, and the first distance corresponding to the blue light-emitting unit 17 is less than the corresponding second distance, that is, d3 < m3.

[0078] The present application further makes a differential design for the first distance and the second distance corresponding to different color light-emitting units 3 themselves, so that the light-emitting unit 3 can simultaneously achieve weakening color deviation and reducing the panel reflectivity.

[0079] Specifically, the influence degree of the brightness attenuation of green light on color shift is significantly greater. Therefore, when designing the light-transmitting hole 14 above the green light-emitting unit 15, how to use it to improve the color shift in the up-and-down viewing angles can be preferentially considered. In this regard, the first distance corresponding to the green light-emitting unit 15 can be preferentially increased, so that the light-transmitting hole 14 above the green light-emitting unit 15 expands more in the up-and-down viewing direction (the first direction x). Further, it is not necessary 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, it is possible to avoid the overall excessive expansion of the light-transmitting hole 14 above the green light-emitting unit 15 and affect the panel reflectivity.

[0080] Since the influence degree of the brightness attenuation of red light and blue light on color shift is relatively small, when designing the light-transmitting holes 14 above the red light-emitting unit 16 and the blue light-emitting unit 17, how to use them to improve the reflectivity can be preferentially considered. In this regard, without the need to additionally increase the first distance corresponding to this part of the light-emitting units, the first distance corresponding to this part of the light-emitting units can be set smaller. For example, the first distance corresponding to the blue light-emitting unit 17 can be set to be less than the second distance, further reducing the size of the light-transmitting hole 14 above the blue light-emitting unit 17, so as to reduce the amount of blue-reflected ambient light to a greater extent, which is more conducive to optimizing the hue trajectory of the display panel in the off-screen state.

[0081] In a feasible implementation manner, 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 with the first direction x.

[0082] Since the viewing angle scene is more likely to occur in the up-and-down viewing direction of the screen than in the left-and-right viewing direction, on the premise that the first distance corresponding to the light-emitting unit 3 has been optimized, the outward expansion distance 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. That is, 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. Exemplarily, m1 = m2 = m3 = 4 μm.

[0083] It should be noted that Figure 5 and Figure 7 the shape of the light-emitting unit 3 shown in

[0084] is only for illustrative purposes, and the light-emitting unit 3 can also be of any other shape. Figure 10 Exemplarily, Figure 10As shown, the light-emitting unit 3 can be circular. In this structure, due to the different degrees of outward expansion of the light-transmitting holes 14 above the light-emitting units 3 of different colors 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 present different shapes.

[0085] For example, the light-transmitting hole 14 above the red light-emitting unit 16 remains circular, and the degrees of outward expansion of the light-transmitting hole above the red light-emitting unit 16 in the first direction x and the second direction y are the same. While the light-transmitting holes 14 above the green light-emitting unit 15 and the blue light-emitting unit 17 are oval, but the difference is that since the light-transmitting hole 14 above the green light-emitting unit 15 expands more in the first direction x, 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, and since the light-transmitting hole 14 above the blue light-emitting unit 17 expands more in the second direction y, 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.

[0086] When the light-emitting unit 3 is circular, referring to Figure 10 , the first distance can be understood as the first distance corresponding to the diameter position where the light-emitting unit 3 extends along the first direction x, and the second distance can be understood as the second distance corresponding to the diameter position where the light-emitting unit 3 extends along the second direction y. Exemplarily, m1 = m2 = m3 = d2 = 4μm, d1 = 5μm, d3 = 3μm.

[0087] Or, Figure 11 Another top view of the display panel provided by the embodiment of the present application is shown in Figure 11 As shown, the light-emitting unit 3 can also be an obliquely arranged square. In this structure, the light-transmitting holes 14 above the light-emitting units 3 of different colors can also present different shapes.

[0088] For example, the light-transmitting hole 14 above the red light-emitting unit 16 remains an obliquely arranged square, and the degrees of outward expansion of the light-transmitting hole above the red light-emitting unit 16 in the first direction x and the second direction y are the same. While the light-transmitting holes 14 above the green light-emitting unit 15 and the blue light-emitting unit 17 are rhombuses, but the difference is that since 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, and since the light-transmitting hole 14 above the blue light-emitting unit 17 expands more in the second direction y, 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.

[0089] When the shape of the light-emitting unit 3 is an obliquely arranged square, referring to Figure 11, the first distance can be understood as the first distance corresponding to the position of the light-emitting unit 3 at the diagonal position extending in the first direction x, and the second distance can be understood as the second distance corresponding to the position of the light-emitting unit 3 at the diagonal position extending in the second direction y. Exemplarily, m1 = m2 = m3 = d2 = 4 μm, d1 = 5 μm, d3 = 3 μm.

[0090] To further optimize the light emission of the light-emitting unit 3, in the direction perpendicular to the plane of the substrate 1, the geometric center of the light-transmitting hole 14 can coincide with the geometric center of the corresponding light-emitting unit 3.

[0091] In a feasible implementation manner, Figure 12 is another structural schematic diagram provided by the embodiment of the present application. As Figure 12 shown, the filter layer 12 further includes a filter structure 20. The filter structure 20 includes filter units 21. The filter units 21 correspond to the light-transmitting holes 14 one by one, and the filter units 21 are located in the corresponding light-transmitting holes 14.

[0092] The filter unit 21 includes a first part 22 and a second part 23. The second part 23 is located on the side of the first part 22 close to the edge of the light-transmitting hole 14. Among them, the film thickness of the second part 23 is smaller than the film thickness of the first part 22.

[0093] In the traditional design, the filter unit 21 has an equal-thickness structure. Figure 13 is a schematic diagram of light transmission comparison provided by the embodiment of the present application. As Figure 13 shown, in this design, the light emitted by the light-emitting unit 3 and transmitted in the positive viewing angle direction will be emitted perpendicularly through the filter unit 21. The transmission distance L1 of this part of the light in the filter unit 21 is the thickness of the filter unit 21 in the direction perpendicular to the plane of the substrate 1. The light emitted by the light-emitting unit 3 and transmitted in the large viewing angle direction is obliquely transmitted through the filter unit 21. The transmission distance L2 of this part of the light in the filter unit 21 is greater than the thickness of the filter unit 21 in the direction perpendicular to the plane of the substrate 1, resulting in serious light absorption, causing a brightness difference in the display panel at different viewing angles and increasing the risk of color shift.

[0094] In response to this, the embodiment of the present application designs the film thickness of the middle part and the edge part of the filter unit 21 differently to reduce the transmission distance L2 of the light transmitted obliquely through the filter unit 21 at a large viewing angle, making the optical path of the obliquely transmitted light tend to be the same as that of the perpendicularly transmitted light and weakening the brightness difference at different viewing angles.

[0095] Furthermore, referring again to Figure 12, the display panel further includes a packaging layer 24, which is located between the light-emitting device layer 2 and the light-filtering layer 12, and is used for thin-film packaging of the light-emitting device layer 2 to prevent the infiltration of water and oxygen. Specifically, the packaging layer 24 may include a first inorganic packaging layer 25, an organic packaging layer 26, and a second inorganic packaging layer 27 that are stacked.

[0096] The display panel further includes a touch function layer 28, which is located between the packaging layer 24 and the light-filtering layer 12 and is used to implement the touch function. Specifically, the touch function layer 28 may include a first insulating layer 29, a touch electrode 30, a second insulating layer 31, and an adhesive layer 32 that are stacked. Among them, the adhesive layer 32 is adjacent to the light-filtering layer 12, and the adhesive layer 32 has a depression, and the light-filtering unit 21 is located in the depression. That is, after the adhesive layer 32 is formed, a depression is formed on the adhesive layer 32 by using a photolithography process, such as a halftone mask process. Then, when the light-filtering layer 12 is formed subsequently, the light-filtering material will fill in the depression, so that the light-filtering unit 21 can be formed with a non-uniform thickness.

[0097] This structure uses the original film layer in the display panel to carry the light-filtering unit 21, without adding other carrier film layers, so it will not affect the original thickness of the module. Moreover, compared with other film layers such as the inorganic packaging layer and the insulating layer, the thickness of the adhesive layer 32 is larger, so the limitation on the design of the depression depth will be smaller. For example, a depression with a larger depth can be formed to make the film thickness difference between the first part 22 and the second part 23 larger.

[0098] In addition, the display panel may further include an array layer 33, which is located between the substrate 1 and the light-emitting device layer 2. Specifically, the array layer 33 may include structures such as pixel circuits and data lines Data.

[0099] In a feasible implementation manner, Figure 14 is another schematic structural diagram of the display panel provided by the embodiment of the present invention. As Figure 14 shown, the film thickness of the first part 22 is equal at different positions, 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 therewith. At this time, the light vertically transmitted emitted from the middle of the light-emitting unit 3 passes through the first part 22 with a uniform thickness and is emitted, and the optical paths are equal, and the light-emitting effect in the front view is better.

[0100] Furthermore, referring to Figure 14 again, for the overlapping first part 22 and light-emitting unit 3: in the same direction, the size of the first part 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.

[0101] Exemplarily, for the overlapping first part 22 and the light-emitting unit 3: in the first direction x, the size of the first part 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 part 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.

[0102] If the size of the first part 22 is too small, the optical path differences of more vertically transmitted light in the filter unit 21 are relatively large, which will affect the light output difference at the front view angle. If the size of the first part 22 is too large, the size of the light-transmitting hole 14 needs to be increased accordingly, which may affect the arrangement between the light-transmitting holes 14 and the pixel density needs to be reduced. The above structure can take into account both the light output effect at the front view angle and a relatively high pixel arrangement density.

[0103] In a feasible implementation manner, referring again to Figure 14 , the angle A between the bottom surface of the second part 23 close to the substrate 1 and the plane where the substrate 1 is located is less than 45°, so that the filter unit 21 has a gentle thickness transition from the middle to both sides, optimizing the light output effect. In one setting manner, A = 30°. Or, in one setting manner, A < 25°.

[0104] In a feasible implementation manner, in combination with Figures 15 to 18 , on one side of the first part 22 in the first direction x, the distance between the edge of the second part 23 and the edge of the first part 22 is the third distance, and on one side of the first part 22 in the second direction y, the distance between the edge of the second part and the edge of the first part is the fourth distance, and the second direction y intersects with the first direction x.

[0105] 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.

[0106] Taking the light-emitting unit 3 as a circle as an example, Figure 15 is another top view of the display panel provided by the embodiment of the present application, Figure 16 is Figure 15 a cross-sectional view along the C1-C2 direction. In combination with Figure 15 and Figure 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, and k1 > h1.

[0107] Since the influence of the brightness attenuation of green light on color deviation is significantly greater, 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 transmitted obliquely in the up-and-down viewing direction (the first direction) to a greater extent, optimize the light output of the green light-emitting unit 15 in the up-and-down viewing direction, and improve the color deviation phenomenon in the large up-and-down viewing direction to a greater extent.

[0108] Figure 17 For Figure 15 a cross-sectional view along the D1-D2 direction, combined with Figure 15 and Figure 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 thereto is h2, and k2 = h2. Figure 18 For Figure 15 a cross-sectional view along the E1-E2 direction, combined with Figure 15 and Figure 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 thereto is h3, and k3 < h3.

[0109] Since the influence of the brightness attenuation of red light and blue light on color deviation is relatively small, when designing the filter units 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 units 21 in the first direction x can be designed to be smaller, so that the filter units 21 achieve a greater anti-reflection effect, which helps to reduce the panel reflectivity to a greater extent.

[0110] 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 sizes of the light-transmitting holes 14 corresponding to different light-emitting units 3.

[0111] Taking the light-emitting unit 3 as a circle as an example, and the first part 22 is also a circle, and the geometric center of the first part 22 coincides with the geometric center of the light-emitting unit 3. For the green light-emitting unit 15, since the light-transmitting hole 14 above it expands more in the first direction x, correspondingly, the third distance of the filter unit 21 above the green light-emitting unit 15 is greater than the fourth distance. For the blue light-emitting unit 17, since the light-transmitting hole 14 above it expands more in the second direction y, correspondingly, the third distance of the filter unit 21 above the blue light-emitting unit 17 is less than the fourth distance.

[0112] 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 light filtering unit 21 can be further adjusted by adjusting the dimensions of the first part 22 in the first direction x and the second direction y.

[0113] Taking the light-emitting unit 3 as a circle as an example, the light filtering unit 21 corresponding to the green light-emitting unit 15 can be designed as an ellipse, with its dimension in the first direction x being smaller than that in the second direction y, so as to increase the third distance to a greater extent. Similarly, the light filtering unit 21 corresponding to the blue light-emitting unit 17 can also be designed as an ellipse, with its dimension in the second direction y being smaller than that in the first direction x, so as to increase the fourth distance to a greater extent.

[0114] In a feasible implementation manner, Figure 19 is another structural schematic diagram of the display panel provided by the embodiment of the present application. As Figure 19 shown, the light filtering structure 20 includes a semi-transparent optical adhesive material. In the direction perpendicular to the plane where the substrate 1 is located, the light filtering structure 20 covers the light-emitting device layer 2. Among them, the transmittance TR of the semi-transparent optical adhesive material can satisfy: 40% ≤ TR ≤ 65%, so as to effectively filter ambient light and achieve the purpose of reducing the panel reflectivity.

[0115] This kind of light filtering layer 12 has a simple structure and only needs two process steps to form the black matrix 13 and the light filtering structure 20 respectively, greatly reducing the process flow and process cost. Moreover, the light filtering structure 20 can also realize the bonding and fixing with the upper cover plate and other structures, and there is no need to additionally set an optical adhesive layer.

[0116] Of course, in other optional implementation manners of the present application, referring to Figure 1 , the light filtering structure 20 can also include color resist materials. Among them, the light filtering unit 21 above the red light-emitting unit 16 includes a red color resist material for transmitting red light, the light filtering unit 21 above the green light-emitting unit 15 includes a green color resist material for transmitting green light, and the light filtering unit 21 above the blue light-emitting unit 17 includes a blue color resist material for transmitting blue light.

[0117] Based on the same inventive concept, the embodiment of the present invention also provides an electronic device. Figure 20 is a structural schematic diagram of the electronic device provided by the embodiment of the present invention. As Figure 20 shown, the electronic device includes the above-mentioned display panel 100. Among them, the specific structure of the display panel 100 has been described in detail in the above embodiments and will not be elaborated here. Of course, Figure 20 the electronic device shown is only for schematic illustration, and the electronic device can be any device with a display function such as a mobile phone, a tablet computer, a notebook computer, an e-book or a television.

[0118] For the same or similar parts among the various embodiments in this specification, reference can be made to each other. In particular, for the apparatus embodiments and the terminal embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and reference can be made to the descriptions in the method embodiments for the relevant parts.

Claims

1. A display panel, characterized in that, Comprising: A 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 that emit light of different colors; A filter layer located on the side of the light-emitting device layer away from the substrate, the filter layer including a black matrix having a plurality of light-transmitting holes, and in a direction perpendicular to the plane of the substrate, the light-transmitting holes correspond one-to-one with the light-emitting units, and the light-emitting units are located within the corresponding light-transmitting holes; On one side in the first 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 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 opposite sides of the light-emitting unit are equal.

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

6. The display panel according to claim 1, wherein: On one side in 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 a second distance, and the second direction intersects 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.

7. The display panel according to claim 1, wherein: On one side in 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 a second distance, and the second direction intersects the first direction; Wherein, 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, the filter structure including filter units, the filter units corresponding one-to-one with the light-transmitting holes, and the filter units being located within the corresponding light-transmitting holes; The filter unit includes a first part and a second part, the second part being located on the side of the first part close to the edge of the light-transmitting hole, wherein the film thickness of the second part is less than the 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 light filtering layer. The touch function layer includes touch electrodes and an adhesive layer. Among them, the adhesive layer is adjacent to the light filtering unit, and the adhesive layer has a depression, and the light filtering unit is located within the depression.

10. The display panel according to claim 8, wherein The film thickness of the first part is equal at different positions, and, in a 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 therewith.

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

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

13. The display panel according to claim 8, wherein 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 the first direction; Among them, for the light filtering unit corresponding to the first light emitting unit, the third distance corresponding to the light filtering unit is greater than the corresponding fourth distance; For the light filtering unit corresponding to the second light emitting unit, the third distance corresponding to the light filtering 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-transparent optical adhesive material, and in a direction perpendicular to the plane of the substrate, the light filtering structure covers the light emitting device layer.

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

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