Display panel and display device

Abstract

The invention discloses a display panel and a display device, and belongs to the technical field of display. The display panel comprises a driving backboard, a pixel definition layer, a light-emitting layer, a dimming layer and a filling layer. The dimming layer is provided with a plurality of dimming holes and a plurality of dimming grooves. The filling layer is in contact with the side walls of the dimming holes in the dimming layer, the filling layer is in contact with the side walls of the dimming grooves in the dimming layer, and meanwhile the refractive index of the filling layer is larger than that of the dimming layer. Therefore, after light emitted by the light emitting layer enters the filling layer, the light can be totally reflected through the side wall of the dimming open hole and can also be totally reflected through the side, deviating from the dimming open hole, of the side wall of the dimming groove distributed around the dimming open hole, and the included angle between the totally reflected light and the normal of the driving backboard is small when the light is emitted. Therefore, the light emitting efficiency of the display panel can be improved, and the performance of a high-resolution product can be further improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] Organic Light Emitting Diode (OLED) display panels are hailed as the next generation of display devices due to their advantages such as self-luminescence, high efficiency, bright colors, light weight, power saving and rollability, and have attracted increasing attention in recent years.

[0003] However, the current OLED display screen has a relatively low light output efficiency. In order to increase the brightness, the only way is to increase the current, which results in high power consumption and short life of the display device. Summary of the invention

[0004] The embodiments of the present application provide a display panel and a display device, which can solve the problem of low light extraction efficiency of the OLED display panel in the prior art. The technical solution is as follows:

[0005] In one aspect, a display panel is provided, comprising: a driving backplane, a pixel definition layer, a light emitting layer, a dimming layer and a filling layer;

[0006] The pixel definition layer is located on one side of the driving backplane, and the pixel definition layer has a plurality of pixel openings;

[0007] The light-emitting layer is located on a side of the pixel definition layer away from the driving backplane, and at least a portion of the light-emitting layer is located in the plurality of pixel openings;

[0008] The dimming layer is located on a side of the light-emitting layer away from the driving backplane, and the dimming layer has a plurality of dimming openings and a plurality of dimming grooves; the plurality of dimming openings correspond to the plurality of pixel openings, and the orthographic projections of the pixel openings on the driving backplane overlap with the orthographic projections of the corresponding dimming openings on the driving backplane; and the plurality of dimming openings correspond to the plurality of dimming grooves, and the dimming grooves are distributed around the corresponding dimming openings;

[0009] The filling layer is located on a side of the dimming layer away from the driving backplane, and the filling layer covers the side walls of each of the dimming openings and the side walls of each of the dimming grooves;

[0010] Wherein, the refractive index of the filling layer is greater than the refractive index of the dimming layer.

[0011] Optionally, for any one of the dimming openings, the number of the dimming grooves distributed around the dimming opening is at least one;

[0012] Among them, for any two adjacent dimming openings, the outermost dimming groove among at least one dimming groove distributed around one dimming opening communicates with the outermost dimming groove among at least one dimming groove distributed around the other dimming opening;

[0013] Alternatively, for any two adjacent dimming openings, the outermost dimming groove among at least one dimming groove distributed around one dimming opening is separately arranged from the outermost dimming groove among at least one dimming groove distributed around the other dimming opening.

[0014] Optionally, when the number of dimming grooves distributed around the dimming opening is multiple, a plurality of the dimming grooves distributed around the dimming opening are nested.

[0015] Optionally, for a plurality of dimming grooves distributed around the dimming opening, the widths of the respective dimming grooves are the same, and the distance between every two adjacent dimming grooves gradually increases in a direction away from the dimming opening.

[0016] Optionally, for a plurality of dimming grooves distributed around the dimming opening, the distance between any two adjacent dimming grooves is the same, and the widths of the plurality of dimming grooves gradually increase in a direction away from the dimming opening.

[0017] Optionally, for a plurality of dimming grooves distributed around the dimming opening, the dimming groove closest to the dimming opening among the plurality of dimming grooves is the first dimming groove, and the dimming groove adjacent to the first dimming groove among the plurality of dimming grooves is the second dimming groove; the distance between the dimming opening and the first dimming groove is less than or equal to the distance between the first dimming groove and the second dimming groove.

[0018] Optionally, the horizontal distance between the dimming opening and the corresponding pixel opening is less than or equal to the distance between the dimming opening and the first dimming groove.

[0019] Optionally, the display panel further includes a buffer layer, and the buffer layer is located on a side of the dimming layer away from the driving backplane; the buffer layer is a film layer structure provided as a whole layer, the buffer layer is in contact with the side walls of the respective dimming openings and is in contact with the side walls of the respective dimming grooves;

[0020] Among them, the refractive index of the buffer layer is less than the refractive index of the filling layer and greater than the refractive index of the dimming layer.

[0021] Optionally, the number of layers of the buffer layer is multiple, and the multiple buffer layers are stacked in a direction away from the driving backplane, and the refractive index of the multiple buffer layers gradually increases in a direction away from the driving backplane.

[0022] Optionally, the angle between the side wall of the dimming opening and the surface of the dimming layer facing the driving backplane is less than or equal to 90°, and the angle between the side wall of the dimming groove and the surface of the dimming layer facing the driving backplane is less than or equal to 90°.

[0023] Optionally, the display panel further includes: a light absorption layer, the light absorption layer is located on a side of the filling layer away from the driving backplane, and the light absorption layer has a plurality of light transmission openings, the plurality of light transmission openings correspond to the plurality of dimming openings, and the orthographic projection of the dimming opening on the driving backplane is located within the orthographic projection of the corresponding light transmission opening on the driving backplane.

[0024] Optionally, the display panel further includes: a first electrode layer and a second electrode layer;

[0025] The first electrode layer is located on a side of the pixel definition layer facing the driving backplane, and the first electrode layer includes a plurality of first electrodes corresponding to the plurality of pixel openings one by one, and the orthographic projection of the pixel opening on the driving backplane is located within the orthographic projection of the corresponding first electrode on the driving backplane;

[0026] The second electrode layer is located on a side of the light-emitting layer away from the driving backplane.

[0027] Optionally, the display panel further includes: a packaging layer, the packaging layer is located on a side of the second electrode layer away from the driving backplane, and the dimming layer is located on a side of the packaging layer away from the driving backplane.

[0028] Optionally, the filling layer includes: a filling portion and a covering portion connected to each other;

[0029] The filling portion fills into each of the dimming openings and each of the dimming grooves, and the covering portion is located on a side of the filling portion and the dimming layer away from the driving backplane.

[0030] On the other hand, a display device is provided, including: a display panel and a driving chip, the display panel is any one of the above-mentioned display panels, and the driving chip is configured to apply a driving signal to the display panel.

[0031] The beneficial effects brought by the technical solution provided by the embodiments of the present application at least include:

[0032] In the embodiment of the present application, by making the filling layer contact the side walls of each dimming opening in the dimming layer, and making the filling layer contact the side walls of each dimming groove in the dimming layer, and since the refractive index of the filling layer is greater than that of the dimming layer. Therefore, after the light emitted by the light-emitting layer enters the filling layer, it can not only be totally reflected through the side walls of the dimming openings, but also be totally reflected through the side of the side walls of the dimming grooves distributed around the dimming openings that is away from the dimming openings. When the totally reflected light exits, the angle between it and the normal of the driving backplane is small. In this way, the light extraction efficiency of the display panel can be improved, and further, the brightness of the positive viewing angle of the display panel can be increased without increasing the current, thereby reducing the power consumption of the display panel, increasing the service life of the display panel, and being beneficial to further improving the performance of high-resolution products. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0034] Figure 1 is a partial top view of a display panel provided by an embodiment of the present application;

[0035] Figure 2 is Figure 1 a schematic diagram of the film layer structure of the display panel shown at A-A';

[0036] Figure 3 is a light extraction effect diagram of a certain light-emitting device in a display panel provided by an embodiment of the present application;

[0037] Figure 4 is Figure 3 an enlarged view of the optical path b in;

[0038] Figure 5 is a schematic diagram of the film layer structure of a display panel provided by an embodiment of the present application;

[0039] Figure 6 is a partial top view of another display panel provided by an embodiment of the present application;

[0040] Figure 7 is Figure 5 a partial enlarged schematic diagram of the display panel shown;

[0041] Figure 8 is Figure 7 an enlarged view of the optical path d in;

[0042] Figure 9It is a partial top view of another display panel provided by an embodiment of the present application;

[0043] Figure 10 It is a schematic diagram of the film layer structure of another display panel provided by an embodiment of the present application;

[0044] Figure 11 It is a schematic diagram of the film layer structure of another display panel provided by an embodiment of the present application;

[0045] Figure 12 It is the light-emitting effect diagram of a certain light-emitting device in another display panel provided by an embodiment of the present application;

[0046] Figure 13 It is Figure 12 The optical path amplification diagram of the optical path h in;

[0047] Figure 14 It is a schematic diagram of the film layer structure of yet another display panel provided by an embodiment of the present application;

[0048] Figure 15 It is the light-emitting effect diagram of a certain light-emitting device in another display panel provided by an embodiment of the present application;

[0049] Figure 16 It is Figure 15 The optical path amplification diagram of the optical path j in;

[0050] Figure 17 It is Figure 15 The optical path amplification diagram of the optical path k in. Detailed implementation manners

[0051] To make the objectives, technical solutions, and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail with reference to the accompanying drawings.

[0052] Please refer to Figure 1 and Figure 2 , Figure 1 is a partial top view of a display panel provided by an embodiment of the present application, Figure 2 is Figure 1 The schematic diagram of the film layer structure of the display panel shown at A-A'. The display panel 000 includes: a driving backplane 100, a pixel definition layer 200, a light-emitting layer 310, a dimming layer 400, and a filling layer 500.

[0053] The pixel definition layer 200 in the display panel 000 is located on one side of the driving backplane 100, and the pixel definition layer 200 has a plurality of pixel openings K.

[0054] In the display panel 000, the light-emitting layer 310 is located on the side of the pixel definition layer 200 facing away from the driving backplane 100, and at least a part of the light-emitting layer 310 is located within a plurality of pixel apertures K. In a possible implementation, a part of the light-emitting layer 310 may be located within the plurality of pixel apertures K, and another part may be located on the side of the pixel definition layer 200 facing away from the driving backplane 100.

[0055] It should be noted that the display panel 000 may further include: a first electrode layer 320 and a second electrode layer 330. Among them, the first electrode layer 320 is located on the side of the pixel definition layer 200 facing the driving backplane 100. The second electrode layer 330 is located on the side of the light-emitting layer 310 facing away from the driving backplane 100.

[0056] Here, the first electrode layer 320 includes a plurality of first electrodes 321 corresponding one-to-one to the plurality of pixel apertures K, and the first electrodes 321 are electrically connected to the driving backplane 100. The orthographic projection of each pixel aperture K on the driving backplane 100 may be located within the orthographic projection of the corresponding first electrode 321 on the driving backplane 100. In this way, the part of the light-emitting layer 310 located within the pixel aperture K can be in contact with the corresponding first electrode 321. In this case, the first electrode 321 corresponding to this pixel aperture K (usually also referred to as the anode), and the parts of the light-emitting layer 310 and the second electrode layer 330 (usually also referred to as the cathode) distributed within this pixel aperture K can form a light-emitting device 300.

[0057] In the display panel 000, the light-dimming layer 400 is located on the side of the light-emitting layer 310 facing away from the driving backplane 100. The light-dimming layer 400 has a plurality of light-dimming apertures G and a plurality of light-dimming grooves O. The plurality of light-dimming apertures G correspond to the plurality of pixel apertures K. The orthographic projection of the pixel aperture K on the driving backplane 100 intersects with the orthographic projection of the corresponding light-dimming aperture G on the driving backplane 100, and the plurality of light-dimming apertures G correspond to the plurality of light-dimming grooves O. The light-dimming grooves O are distributed around the corresponding light-dimming apertures G. It should be noted that the included angle between the side wall of the light-dimming aperture G and the surface of the light-dimming layer 400 facing the driving backplane 100 is less than or equal to 90°, and the included angle between the side wall of the light-dimming groove O and the surface of the light-dimming layer 400 facing the driving backplane 100 is less than or equal to 90°.

[0058] In the display panel 000, the filling layer 500 is located on the side of the light-dimming layer 400 facing away from the driving backplane 100. The filling layer 500 covers the side walls of each light-dimming aperture G and the side walls of each light-dimming groove O. Among them, the refractive index of the filling layer 500 is greater than the refractive index of the light-dimming layer 400. Exemplarily, the refractive index of the light-dimming layer 400 ranges from 1.3 to 1.5, and the refractive index of the filling layer 500 ranges from 1.7 to 1.9.

[0059] It should be noted that the filling layer 500 may include: a connected filling portion 510 and a covering portion 520. The filling portion 510 is filled into each dimming opening G and each dimming groove O, and the covering portion 520 is located on the side of the filling portion 510 and the dimming layer 400 away from the driving backplane 100. In a possible case, the filling portion 510 may be in contact with the side walls of each dimming opening G and in contact with the side walls of each dimming groove O.

[0060] In this case, please refer to Figure 3 , Figure 3 which is the light emission effect diagram of a certain light-emitting device in a display panel provided by an embodiment of the present application. Here, the filling layer 500 may be in contact with the side walls of each dimming opening G. After the light emitted by the light-emitting layer 310 in this light-emitting device 300 enters the filling layer 500, since the side of the dimming layer 400 away from the driving backplane 100 may be in contact with the filling layer 500, and the refractive index of the filling layer 500 is greater than the refractive index of the dimming layer 400. Therefore, when the angle between the side wall of the dimming opening G corresponding to the pixel opening K and the surface of the dimming layer 400 facing the driving backplane 100 is less than or equal to 90°, if the incident angle of the light (for example, light a) that is incident on the side wall of the dimming opening G among the light rays entering the filling layer 500 through the dimming opening G is large, this light ray a is very likely to undergo total internal reflection. The light ray a that undergoes total internal reflection will not enter the dimming layer 400 but is totally internally reflected back into the filling layer 500 again. That is to say, the light ray incident on the side wall of the dimming opening G is very likely to undergo total internal reflection, thereby changing the light transmission path, so that the light ray after total internal reflection can exit from the side of the filling layer 500 away from the driving backplane 100, and the angle between the light ray after total internal reflection and the normal of the driving backplane 100 when exiting is small. In this way, the light emission efficiency of the display panel 000 can be improved, and further, the brightness of the positive viewing angle of the display panel 000 can be increased without increasing the current, thereby reducing the power consumption of the display panel 000, increasing the service life of the display panel 000, and being beneficial to further improving the performance of high-resolution products.

[0061] If the incident angle of the light ray b that is incident on the side wall of the dimming opening G among the light rays entering the filling layer 500 through the dimming opening G is small, this light ray b will be refracted into the dimming layer 400. Here, to more clearly observe the optical path of the light ray b, please refer to Figure 4 , Figure 4 which is Figure 3Optical path amplification diagram of the middle optical path b. Also, since the light modulation layer 400 is provided with light modulation grooves O distributed around the light modulation opening G, the light b refracted to the light modulation layer 400 will be refracted again to the part of the filling layer 500 distributed in the light modulation grooves O, and the refracted light b will be directed to the side of the side wall of the light modulation groove O away from the light modulation opening G. At the same time, the incident angle of the light b directed to the side of the side wall of the light modulation groove O away from the light modulation opening G will be increased under the action of refraction. For this reason, when the angle between the side wall of the light modulation groove O and the surface of the light modulation layer 400 facing the driving backplane 100 is less than or equal to 90°, the light b directed to the side of the side wall of the light modulation groove O away from the light modulation opening G is very likely to undergo total reflection. The light b undergoing total reflection will not enter the light modulation layer 400 but will be totally reflected again into the filling layer 500. That is to say, the light directed to the side of the side wall of the light modulation groove O away from the light modulation opening G is very likely to undergo total reflection, thereby changing the transmission path of the light, so that the light after total reflection can exit from the side of the filling layer 500 away from the driving backplane 100, and the angle between the light after total reflection and the normal of the driving backplane 100 when exiting is small. In this way, the light extraction efficiency of the display panel 000 can be further improved.

[0062] In addition, for the light c among the light entering the filling layer 500 through the light modulation groove O and directed to the side of the side wall of the light modulation groove O away from the corresponding light modulation opening G, when the incident angle of this light c is relatively large, this light c is very likely to undergo total reflection. The light c undergoing total reflection will not enter the light modulation layer 400 but will be totally reflected again into the filling layer 500. That is to say, the light directed to the side wall of the light modulation groove O is very likely to undergo total reflection, thereby changing the transmission path of the light, so that the light after total reflection can exit from the side of the filling layer 500 away from the driving backplane 100, and the angle between the light after total reflection and the normal of the driving backplane 100 when exiting is small. In this way, the light extraction efficiency of the display panel 000 is further improved.

[0063] In summary, for the display panel provided by the embodiment of the present application, by making the filling layer contact with the side walls of each light modulation opening in the light modulation layer, and making the filling layer contact with the side walls of each light modulation groove in the light modulation layer, and at the same time, since the refractive index of the filling layer is greater than that of the light modulation layer. Therefore, after the light emitted by the light-emitting layer enters the filling layer, it can not only undergo total reflection through the side wall of the light modulation opening, but also undergo total reflection through the side of the side wall of the light modulation groove distributed around the light modulation opening away from the light modulation opening. The angle between the light after total reflection and the normal of the driving backplane when exiting is small. In this way, the light extraction efficiency of the display panel can be improved, and further, the brightness of the positive viewing angle of the display panel can be increased without increasing the current, thereby reducing the power consumption of the display panel, increasing the service life of the display panel, and being beneficial to further improving the performance of high-resolution products.

[0064] In the embodiments of the present application, please refer to Figure 5 , Figure 5 which is a schematic diagram of the film layer structure of a display panel provided by an embodiment of the present application. The display panel 000 may further include a packaging layer 600. The packaging layer 600 is located on the side of the second electrode layer 330 away from the driving backplane 100, and the dimming layer 400 is located on the side of the packaging layer 600 away from the driving backplane 100. The packaging layer 600 can be used to package each light-emitting device 300, so that water and oxygen in the external environment are not easily eroded into the interior of the light-emitting device 300, thereby reducing the probability of damage to the light-emitting device 300. Here, the packaging layer 600 may include two inorganic packaging layers and one organic packaging layer located between the two inorganic packaging layers. In this case, the thickness of the packaging layer 600 is relatively large.

[0065] In the embodiments of the present application, the display panel 000 may further include: a light-absorbing layer 700. For example, the light-absorbing layer 700 can be made of a light-absorbing material. For example, the light-absorbing layer 700 can be a black matrix layer. The light-absorbing layer 700 is located on the side of the filling layer 500 away from the driving backplane 100, and the light-absorbing layer 700 has a plurality of light-transmitting openings 700a. The plurality of light-transmitting openings 700a correspond to a plurality of dimming openings G, and the orthographic projection of the dimming opening G on the driving backplane 100 is located within the orthographic projection of the corresponding light-transmitting opening 700a on the driving backplane 100. In this way, the orthographic projection of the light-emitting device 300 in the display panel 000 on the driving backplane 100 is located within the orthographic projection of the corresponding light-transmitting opening 700a on the driving backplane 100. In this way, it can be ensured that the light-absorbing layer 700 does not block the main light rays emitted by the light-emitting device 300, so as to improve the light extraction efficiency of the light-emitting device 300.

[0066] Here, by providing the light-absorbing layer 700, the phenomenon of color crosstalk in the display panel 000 can be effectively avoided. Moreover, the light-absorbing layer 700 can also absorb external environmental light, reduce the reflectivity of the display panel 000 to external environmental light, and improve the display effect of the display panel 000. In addition, the thicker the light-absorbing layer 700, the better the effect of preventing color crosstalk and reducing the reflectivity of environmental light.

[0067] In the embodiments of the present application, please refer to Figure 1 and Figure 6 , Figure 6 which is a partial top view of another display panel provided by an embodiment of the present application. It should be noted that Figure 5 can be Figure 6Schematic diagram of the film layer structure of the display panel 000 shown at B-B'. For any dimming opening G, the number of dimming grooves O distributed around the dimming opening G is at least one. In this way, each light-emitting device 300 is distributed around with a dimming opening G and at least one dimming groove O. Thus, each light-emitting device 300 can improve the light extraction efficiency of the display panel 000 through the corresponding dimming opening G and the dimming grooves O distributed around the dimming opening G.

[0068] Among them, as Figure 1 shown, for any two adjacent dimming openings G, the outermost dimming groove O among the at least one dimming groove O distributed around one dimming opening G is communicated with the outermost dimming groove O among the at least one dimming groove O distributed around the other dimming opening G. In this case, the side walls of the communicated dimming grooves O perform total reflection on the light emitted by the two light-emitting devices 300 corresponding to the two dimming openings G distributed on both sides of the dimming groove O. That is, any one of the two light-emitting devices 300 can perform total reflection on the side wall of the dimming groove O facing away from the light-emitting device 300.

[0069] Or, as Figure 3 shown, for any two adjacent dimming openings G, the outermost dimming groove O among the at least one dimming groove O distributed around one dimming opening G is separately arranged from the outermost dimming groove O among the at least one dimming groove O distributed around the other dimming opening G. That is, the orthographic projection of the outermost dimming groove O among the at least one dimming groove O distributed around one dimming opening G on the driving backplane 100 does not overlap with the orthographic projection of the outermost dimming groove O among the at least one dimming groove O distributed around the other dimming opening G on the driving backplane 100.

[0070] In the embodiments of the present application, please refer to Figure 6 、 Figure 7 and Figure 8 , Figure 7 is Figure 5 the partial enlarged schematic diagram of the display panel shown, Figure 8 is Figure 7 the enlarged optical path diagram of the optical path d in

[0071] In the case where the number of dimming grooves O distributed around the dimming opening G is multiple, multiple dimming grooves O distributed around the dimming opening G are nested. Figure 7The large-angle outgoing light d) emitted by the light-emitting device 300. Among the multiple dimming grooves O around the dimming opening G, the dimming groove Oa is closer to the dimming opening G than the dimming groove Ob. When the light d is incident on the side wall of the dimming groove Oa facing away from the corresponding dimming opening G, since the light d does not reach the critical angle of total reflection, the light d will be refracted from the side wall of the dimming groove Oa into the dimming layer 400.

[0072] After that, the light d refracted into the dimming layer 400 is refracted again into the part of the filling layer 500 distributed in the dimming groove Ob, and the refracted light d will be incident on the side of the side wall of the dimming groove Ob facing away from the dimming opening G. At the same time, the incident angle of the light d incident on the side of the side wall of the dimming groove Ob facing away from the dimming opening G will be increased under the action of refraction to reach the critical angle of total reflection. Therefore, when the angle between the side wall of the dimming groove Ob and the surface of the dimming layer 400 facing the driving backplane 100 is less than or equal to 90°, the light d incident on the side of the side wall of the dimming groove Ob facing away from the dimming opening G is very likely to undergo total reflection. The light d undergoing total reflection will not enter the dimming layer 400 but is totally reflected again into the filling layer 500, thereby changing the transmission path of this beam of light d, so that the light d after total reflection can exit from the side of the filling layer 500 facing away from the driving backplane 100, and the angle between the light d after total reflection and the normal of the driving backplane 100 when exiting is small. In this way, the light extraction efficiency of the display panel 000 can be further improved.

[0073] It should also be noted that when the encapsulation layer 600 includes two inorganic encapsulation layers and one organic encapsulation layer located between the two inorganic encapsulation layers, due to the relatively thick encapsulation layer 600, some of the light in the large-angle outgoing light is difficult to be absorbed by the light-absorbing layer 700 in the display panel 000, but enters the adjacent pixels, resulting in the adverse phenomena of color crosstalk in the display panel 000 and light leakage at the edge of the display panel 000.

[0074] In the present application, as Figure 7As shown, the light-emitting device 300A and the light-emitting device 300B are two adjacent light-emitting devices 300. In the dimming groove O corresponding to the light-emitting device 300A, for the light (e.g., the light e emitted from the large viewing angle of the light-emitting device 300A) emitted from the light-emitting device 300A at a large viewing angle, with respect to the dimming groove O provided around the dimming opening G corresponding to the light-emitting device 300A, the light e can undergo total internal reflection on the side wall of the dimming groove O facing away from the corresponding dimming opening G, thereby changing the transmission path of the light e, so that the light e that would originally crosstalk to the light-emitting device 300B among the light emitted from the light-emitting device 300A at a large viewing angle can be absorbed by the light-absorbing layer 700 after total internal reflection, effectively reducing the probability of the light emitted at a large viewing angle crosstalking to adjacent pixels, and effectively reducing the probability of light leakage at the edge of the display panel 000, making the display effect of the display panel 000 better.

[0075] And in the dimming groove O corresponding to the light-emitting device 300B, for the light (e.g., the light f emitted from the large viewing angle of the light-emitting device 300A) emitted from the light-emitting device 300A at a large viewing angle, with respect to the dimming groove O provided around the dimming opening G corresponding to the light-emitting device 300B, the light f can undergo total internal reflection on the side wall of the dimming groove O facing the corresponding dimming opening G, thereby changing the transmission path of the light f, so that the light f that would originally crosstalk to the light-emitting device 300B among the light emitted from the light-emitting device 300A at a large viewing angle can be absorbed by the light-absorbing layer 700 after total internal reflection, further reducing the probability of the light emitted at a large viewing angle crosstalking to adjacent pixels, making the display effect of the display panel 000 better.

[0076] In the embodiments of the present application, when the number of dimming grooves O distributed around the dimming opening G is multiple, there are multiple optional implementation manners for the multiple dimming grooves O distributed around the dimming opening G. The embodiments of the present application will be schematically described by taking the following two optional implementation manners as examples.

[0077] It should be noted that as Figure 7 shown, for any dimming opening G, among the multiple dimming grooves O around the dimming opening G, the probability that the light undergoing total internal reflection in the dimming groove O close to the dimming opening G is absorbed by the light-absorbing layer 700 is small, and the probability that the light undergoing total internal reflection can be emitted from the light-transmitting opening 700a is large; while the probability that the light undergoing total internal reflection in the dimming groove O far from the dimming opening G is absorbed by the light-absorbing layer 700 is large.

[0078] The first optional implementation manner, as Figure 6As shown, for a plurality of dimming grooves O distributed around the dimming opening G, the widths of the respective dimming grooves O are the same, and the distance between every two adjacent dimming grooves O gradually increases in a direction away from the dimming opening G. Exemplarily, as Figure 6 shown, the distance d2 between two adjacent dimming grooves O away from the dimming opening G is greater than the distance d1 between two adjacent dimming grooves O close to the dimming opening G. That is, for any dimming opening G, the closer to the dimming opening G, the denser the arrangement of the dimming grooves O distributed around the dimming opening G.

[0079] In this case, since the closer to the dimming opening G, the denser the arrangement of the dimming grooves O distributed around the dimming opening G, the more total-reflection light that can be emitted from the light-transmitting opening 700a among the total-reflection light. Therefore, compared with the uniformly arranged dimming grooves O, Figure 6 the display panel 000 shown can further improve the light-emitting efficiency of the display panel 000.

[0080] For a second alternative implementation, please refer to Figure 9 , Figure 9 which is a partial top view of another display panel provided by an embodiment of the present application. For a plurality of dimming grooves O distributed around the dimming opening G, the distance between any two adjacent dimming grooves O is the same, and the widths of the plurality of dimming grooves O gradually increase in a direction away from the dimming opening G. Exemplarily, as Figure 9 shown, the width d4 of the dimming groove O away from the corresponding dimming opening G is greater than the width d3 of the dimming groove O close to the corresponding dimming opening G. That is, for any dimming opening G, the closer to the dimming opening G, the denser the arrangement of the dimming grooves O distributed around the dimming opening G.

[0081] In this case, since the closer to the dimming opening G, the denser the arrangement of the dimming grooves O distributed around the dimming opening G, the more total-reflection light that can be emitted from the light-transmitting opening 700a among the total-reflection light. Therefore, compared with the uniformly arranged dimming grooves O, Figure 9 the display panel 000 shown can further improve the light-emitting efficiency of the display panel 000.

[0082] It should be noted that for the above alternative implementation, please refer to Figure 10 , Figure 10It is a schematic diagram of the film layer structure of another display panel provided by an embodiment of the present application. For a plurality of dimming grooves O distributed around the dimming opening G, the dimming groove O closest to the dimming opening G among the plurality of dimming grooves O is the first dimming groove O1, and the dimming groove O adjacent to the first dimming groove O1 among the plurality of dimming grooves O is the second dimming groove O2. The distance d5 between the dimming opening G and the first dimming groove O1 is less than or equal to the distance d6 between the first dimming groove O1 and the second dimming groove O2. In this way, it can be ensured that the distance between the first dimming groove O1 distributed around the dimming opening G and the dimming opening G is small, so that the dimming grooves O distributed close to the dimming opening G are arranged more densely, and thus the light extraction efficiency of the display panel 000 can be further improved.

[0083] It should also be noted that the horizontal distance d7 between the dimming opening G and the corresponding pixel opening K is less than or equal to the distance d5 between the dimming opening G and the first dimming groove O1. In this way, it can be ensured that the horizontal distance d7 between the dimming opening G and the corresponding pixel opening K is small, so that the side wall of the dimming opening G and the side of the side walls of the respective dimming grooves O distributed around the dimming opening G facing the dimming opening G can better perform total reflection on the large-angle light emitted through the pixel opening K, so as to ensure that the reflected light can be emitted through the light-transmitting opening 700a of 700 as much as possible.

[0084] In the embodiment of the present application, please refer to Figure 11 , Figure 11 It is a schematic diagram of the film layer structure of another display panel provided by an embodiment of the present application. The display panel 000 further includes a buffer layer 800, and the buffer layer 800 is located on the side of the dimming layer 400 away from the driving backplane 100. And the buffer layer 800 is a film layer structure provided as a whole layer. In this way, the buffer layer 800 can be in contact with the side walls of the respective dimming openings G and in contact with the side walls of the respective dimming grooves O. Exemplarily, the buffer layer 800 can be made of an inorganic material, and the thickness range of the buffer layer 800 is 100 nanometers to 1000 nanometers.

[0085] In this case, the filling layer 500 is located on the side of the buffer layer 800 away from the driving backplane 100 and is in contact with the side of the buffer layer 800 away from the driving backplane 100. Among them, the refractive index of the buffer layer 800 is less than the refractive index of the filling layer 500 and greater than the refractive index of the dimming layer 400.

[0086] Please refer to Figure 12 and Figure 13 , Figure 12 It is the light extraction effect diagram of a certain light-emitting device in another display panel provided by an embodiment of the present application, Figure 13 is Figure 12Optical path magnification diagram of the middle optical path h. After the light emitted by the light-emitting layer 310 in the light-emitting device 300 enters the filling layer 500, since one side of the buffer layer 800 facing away from the driving backplane 100 can be in contact with the filling layer 500, and the refractive index of the buffer layer 800 is less than that of the filling layer 500, therefore, for the light ray (e.g., light ray g) incident on the buffer layer 800 in contact with the side wall of the dimming opening G, if the incident angle of the light ray g satisfies the critical angle condition of total reflection, the light ray g undergoes total reflection. The light ray that undergoes total reflection does not enter the buffer layer 800, but is totally reflected again into the filling layer 500 and exits from the side of the filling layer 500 facing away from the driving backplane 100. Correspondingly, if the incident angle of the light ray does not satisfy the critical angle condition of total reflection (e.g., light ray h), the light ray h will refract into the buffer layer 800, and the refraction angle of the light ray h refracted into the buffer layer 800 is greater than the incident angle. Then, the light ray h refracted into the buffer layer 800 will be incident on the side wall of the dimming opening G. Since the refraction angle of the light ray h refracted into the buffer layer 800 is greater than the incident angle, the incident angle of the light ray h when it is incident on the side wall of the dimming opening G increases and can satisfy the critical angle condition of total reflection. Therefore, when the included angle between the side wall of the dimming opening G and the side of the dimming layer 400 facing the driving backplane 100 is less than or equal to 90°, the light ray h refracted into the buffer layer 800 undergoes total reflection. The light ray h that undergoes total reflection does not enter the dimming layer 400, but is totally reflected again into the buffer layer 800 and exits from the side of the buffer layer 800 facing away from the driving backplane 100, and then enters the filling layer 500 again and exits from the side of the filling layer 500 facing away from the driving backplane 100. In this way, the range of the incident angles of the light rays that can undergo total reflection on the side wall of the dimming opening G is increased, and the light extraction efficiency of the display panel 000 can be further improved.

[0087] Similarly, for the light rays incident on the buffer layer 800 in contact with the side wall of the dimming groove O that is away from the corresponding dimming opening G, the same phenomenon as that of the light rays incident on the buffer layer 800 in contact with the side wall of the dimming opening G can also occur. In this way, the range of the incident angles of the light rays that can undergo total reflection on the side wall of the dimming groove O can be increased, and the light extraction efficiency of the display panel 000 can be further improved.

[0088] It should be noted that, please refer to Figure 14 , Figure 14 which is a schematic diagram of the film layer structure of another display surface provided by the test embodiment of the present application. The number of layers of the buffer layer 800 can be multiple, and the multiple buffer layers 800 are stacked in the direction away from the driving backplane 100, and the refractive index of the multiple buffer layers 800 gradually increases in the direction away from the driving backplane 100.

[0089] In this case, for the buffer layer 800 in the multi-layer buffer layer 800 that is closer to the driving backplane 100, one side of the buffer layer 800 facing the driving backplane 100 can be in contact with the dimming layer 400. For the buffer layer 800 in the multi-layer buffer layer 800 that is farther from the driving backplane 100, one side of the buffer layer 800 facing away from the driving backplane 100 can be in contact with the filling layer 500.

[0090] Exemplarily, please refer to Figure 15 、 Figure 16 and Figure 17 , Figure 15 which is the light emission effect diagram of a certain light-emitting device in another display panel provided by an exemplary embodiment of the present application. Figure 16 is Figure 15 the optical path magnification diagram of the optical path j in Figure 17 is Figure 15 the optical path magnification diagram of the optical path k in

[0091] After the light emitted by the light-emitting layer 310 in this light-emitting device 300 enters the filling layer 500, since one side of the second buffer layer 820 facing away from the driving backplane 100 can be in contact with the filling layer 500 and the refractive index of the second buffer layer 820 is less than that of the filling layer 500, therefore, for the light ray incident on the second buffer layer 820 located inside the dimming opening G, if the incident angle of the light ray satisfies the critical angle condition of total reflection (for example, the light ray i), the light ray i undergoes total reflection. The light ray i that undergoes total reflection will not enter the second buffer layer 820, but is totally reflected again into the filling layer 500 and exits from the side of the filling layer 500 facing away from the driving backplane 100.

[0092] If the light ray incident on the second buffer layer 820 located within the dimming aperture G does not satisfy the critical angle condition for total internal reflection (e.g., light ray j), the light ray j will refract into the second buffer layer 820, and the refraction angle of the light ray j refracted into the second buffer layer 820 is greater than the incident angle. Subsequently, the light ray j refracted into the second buffer layer 820 will be incident on the first buffer layer 810. Since the refraction angle of the light ray j refracted into the second buffer layer 820 is greater than the incident angle, the incident angle of the light ray j when it is incident on the first buffer layer 810 increases. Here, for the light ray j refracted into the second buffer layer 820 and incident on the first buffer layer 810, if the light ray j satisfies the critical angle condition for total internal reflection, the light ray j undergoes total internal reflection at the contact surface between the first buffer layer 810 and the second buffer layer 820 within the dimming aperture G. The light ray j that undergoes total internal reflection does not enter the first buffer layer 810 but is totally internally reflected back into the second buffer layer 820 again and exits from the side of the second buffer layer 820 facing away from the driving backplane 100, and then passes through the filling layer 500 and exits from the side of the filling layer 500 facing away from the driving backplane 100.

[0093] In addition, if the light ray refracted into the second buffer layer 820 and incident on the first buffer layer 810, although the incident angle of the light ray increases when it is incident on the first buffer layer 810 after one refraction, the light ray still does not satisfy the critical angle condition for total internal reflection (e.g., light ray k). The light ray k is refracted into the first buffer layer 810 again at the contact surface between the first buffer layer 810 and the second buffer layer 820 within the dimming aperture G. In this way, for the light ray k refracted into the first buffer layer 810 again and incident on the sidewall of the dimming aperture G, since the incident angle of the light ray k after the second refraction becomes larger, it can satisfy the critical angle condition for total internal reflection. Therefore, the light ray k after the second refraction undergoes total internal reflection. The light ray k that undergoes total internal reflection does not enter the dimming layer 400 but is totally internally reflected back into the first buffer layer 810 again and exits from the side of the first buffer layer 810 facing away from the driving backplane 100, then passes through the second buffer layer 820, enters the filling layer 500 again, and exits from the side of the filling layer 500 facing away from the driving backplane 100. Thus, the incident angle of the light ray incident on the sidewall of the dimming aperture G is gradually increased through multiple refractions, so that the range of the incident angles of the light rays that undergo total internal reflection on the sidewall of the dimming aperture G is increased, and the light extraction efficiency of the display panel 000 can be further improved.

[0094] Therefore, by providing the multi-layer buffer layer 800, the incident angle of the light ray incident on the sidewall of the dimming aperture G can be gradually increased through multiple refractions, so that the range of the incident angles of the light rays that undergo total internal reflection on the sidewall of the dimming aperture G is increased, and the light extraction efficiency of the display panel 000 can be further improved.

[0095] Similarly, for the light rays incident on the sidewall of the dimming groove O, the same phenomenon as that of the light rays incident on the sidewall of the dimming opening G can also occur. In this way, the incident angle of the light rays incident on the sidewall of the dimming groove O is gradually increased through multiple refractions, so that the range of the incident angles of the light rays undergoing total reflection on the sidewall of the dimming groove O is increased, which can further improve the light extraction efficiency of the display panel 000.

[0096] It should also be noted that, as Figure 15 shown, for the light rays that can directly exit from the dimming opening G, such as the light ray m, since the refractive index of the multi-layer buffer layer 800 gradually increases in the direction away from the driving backplane 100, the refractive index of the buffer layer 800 is less than that of the filling layer 500, and the refractive index of the buffer layer 800 is greater than that of the dimming layer 400, the light rays can undergo refraction at the interfaces of the multi-layer buffer layer 800, at the interface between the buffer layer 800 and the encapsulation layer 600, and at the interface between the buffer layer 800 and the filling layer 500, thereby increasing the optical path of the light ray m, enabling the light ray m to slowly transition to the film layer with a higher refractive index, which is beneficial to the full transmission and divergence of the light rays.

[0097] In summary, for the display panel provided by the embodiment of the present application, by making the filling layer contact the sidewalls of each dimming opening in the dimming layer and making the filling layer contact the sidewalls of each dimming groove in the dimming layer, and since the refractive index of the filling layer is greater than that of the dimming layer. Therefore, after the light emitted by the light-emitting layer enters the filling layer, it can not only undergo total reflection through the sidewalls of the dimming openings, but also undergo total reflection through the side of the sidewalls of the dimming grooves distributed around the dimming openings that is away from the dimming openings. The angle between the light rays after total reflection and the normal of the driving backplane when exiting is small. In this way, the light extraction efficiency of the display panel can be improved, and further, the brightness of the positive viewing angle of the display panel can be increased without increasing the current, thereby reducing the power consumption of the display panel, increasing the service life of the display panel, and being beneficial to further improving the performance of high-resolution products.

[0098] The embodiment of the present application also provides a display device, which may include: a display panel and a driving chip. The display panel is the above-mentioned display panel, and the driving chip is used to apply a driving signal to the display panel. The display device may be: any product or component with a display function such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, etc.

[0099] It should be noted that in the drawings, the dimensions of layers and regions may be exaggerated for clarity of illustration. Also, it is understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element, or there may be an intermediate layer. Additionally, it is understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element, or there may be more than one intermediate layer or element. Further, it is understood that when a layer or element is referred to as being "between" two layers or two elements, it can be the only layer between the two layers or two elements, or there may also be more than one intermediate layer or element. Like reference numerals throughout indicate like elements.

[0100] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless otherwise specifically defined.

[0101] The above are only optional embodiments of this application and are not intended to limit this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims

1. A display panel, characterized in that: include: Driving backplane, pixel definition layer, light emitting layer, dimming layer and filling layer; The pixel definition layer is located on one side of the driving backplane, and the pixel definition layer has a plurality of pixel openings; The light-emitting layer is located on a side of the pixel definition layer away from the driving backplane, and at least a portion of the light-emitting layer is located in the plurality of pixel openings; The dimming layer is located on a side of the light-emitting layer away from the driving backplane, and the dimming layer has a plurality of dimming openings and a plurality of dimming grooves; the plurality of dimming openings correspond to the plurality of pixel openings, and the orthographic projections of the pixel openings on the driving backplane overlap with the orthographic projections of the corresponding dimming openings on the driving backplane; and the plurality of dimming openings correspond to the plurality of dimming grooves, and the dimming grooves are distributed around the corresponding dimming openings; The filling layer is located on a side of the dimming layer away from the driving backplane, and the filling layer covers the side walls of each of the dimming openings and the side walls of each of the dimming grooves; Wherein, the refractive index of the filling layer is greater than the refractive index of the dimming layer.

2. The display panel according to claim 1, characterized in that: For any one of the dimming openings, the number of the dimming grooves distributed around the dimming opening is at least one; Wherein, for any two adjacent dimming openings, the outermost dimming groove among at least one dimming groove distributed around one dimming opening is connected to the outermost dimming groove among at least one dimming groove distributed around another dimming opening; Alternatively, for any two adjacent dimming openings, the outermost dimming groove in at least one dimming groove distributed around one dimming opening is separated from the outermost dimming groove in at least one dimming groove distributed around another dimming opening.

3. The display panel according to claim 2, characterized in that: In the case that there are multiple dimming grooves distributed around the dimming opening, the multiple dimming grooves are nested and distributed around the dimming opening.

4. The display panel according to claim 3, characterized in that: For the plurality of dimming grooves distributed around the dimming opening, the widths of the dimming grooves are the same, and the distance between every two adjacent dimming grooves gradually increases in a direction away from the dimming opening.

5. The display panel according to claim 3, characterized in that: For the plurality of dimming grooves distributed around the dimming opening, the distance between any two adjacent dimming grooves is the same, and the widths of the plurality of dimming grooves gradually increase in a direction away from the dimming opening.

6. The display panel according to any one of claims 3 to 5, characterized in that: For the multiple dimming grooves distributed around the dimming opening, the dimming groove closest to the dimming opening among the multiple dimming grooves is the first dimming groove, and the dimming groove adjacent to the first dimming groove among the multiple dimming grooves is the second dimming groove; the distance between the dimming opening and the first dimming groove is less than or equal to the distance between the first dimming groove and the second dimming groove.

7. The display panel according to claim 6, characterized in that: A horizontal distance between the dimming opening and the corresponding pixel opening is less than or equal to a distance between the dimming opening and the first dimming groove.

8. The display panel according to any one of claims 1 to 6 and 7, characterized in that: The display panel further includes a buffer layer, which is located on a side of the dimming layer away from the driving backplane; the buffer layer is a film layer structure arranged in a whole layer, and the buffer layer contacts the side walls of each of the dimming openings and the side walls of each of the dimming grooves; Wherein, the refractive index of the buffer layer is smaller than the refractive index of the filling layer, and larger than the refractive index of the dimming layer.

9. The display panel according to claim 8, characterized in that: The buffer layer has multiple layers, the multiple buffer layers are stacked in a direction away from the driving back plate, and the refractive index of the multiple buffer layers gradually increases in a direction away from the driving back plate.

10. The display panel according to any one of claims 1-5, 7 and 9, characterized in that: The angle between the side wall of the dimming opening and the side of the dimming layer facing the driving backplane is less than or equal to 90°, and the angle between the side wall of the dimming groove and the side of the dimming layer facing the driving backplane is less than or equal to 90°.

11. The display panel according to any one of claims 1 to 5, 7 and 9, characterized in that: The display panel also includes: a light absorbing layer, which is located on the side of the filling layer away from the driving backplane, and the light absorbing layer has a plurality of light-transmitting openings, the plurality of light-transmitting openings correspond to the plurality of dimming openings, and the orthographic projection of the dimming openings on the driving backplane is located within the orthographic projection of the corresponding light-transmitting openings on the driving backplane.

12. The display panel according to claim 11, characterized in that: The display panel further includes: a first electrode layer and a second electrode layer; The first electrode layer is located on a side of the pixel definition layer facing the driving backplane, and the first electrode layer includes a plurality of first electrodes corresponding to the plurality of pixel openings one by one, and the orthographic projections of the pixel openings on the driving backplane are located within the orthographic projections of the corresponding first electrodes on the driving backplane; The second electrode layer is located on a side of the light emitting layer away from the driving backplane.

13. The display panel according to claim 12, characterized in that: The display panel further includes: an encapsulation layer, the encapsulation layer is located on a side of the second electrode layer away from the driving backplane, and the dimming layer is located on a side of the encapsulation layer away from the driving backplane.

14. The display panel according to any one of claims 1-5, 7, 9, 12-13, characterized in that: The filling layer comprises: a filling part and a covering part connected to each other; The filling portion is filled into each of the dimming openings and each of the dimming grooves, and the covering portion is located on a side of the filling portion and the dimming layer that is away from the driving backplane.

15. A display device, characterized in that: include: A display panel and a driving chip, wherein the display panel is the display panel according to any one of claims 1 to 14, and the driving chip is used to apply a driving signal to the display panel.

Images