Display panel and display apparatus

Abstract

The present disclosure provides a display panel and a display apparatus. The display panel comprises: a driving backplane, a light-emitting layer located on the driving backplane, and a color film layer located on the side of the light-emitting layer facing away from the driving backplane, wherein the light-emitting layer comprises a plurality of light-emitting units, and each light-emitting unit comprises a plurality of light-emitting devices having different light-emitting colors; the color film layer comprises a light shielding part, a plurality of light filtering parts surrounded by the light shielding part, and a reinforcing part surrounding the plurality of light filtering parts; a plurality of openings are formed in the reinforcing part, the plurality of openings and the plurality of light filtering parts both correspond to the plurality of light-emitting devices, and the reinforcing part at least partially overlaps the light shielding part; and the refractive index of the reinforcing part is less than that of the light filtering parts.

Description

Display panel and display device Technical Field

[0001] The present disclosure 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 have the advantages of simple structure, fast response speed, active light emission, and low power consumption. They have been widely used in display fields such as mobile phones, tablets, and televisions.

[0003] To improve the display quality of OLED display panels, methods currently available include placing polarizers or thin color filters (CFs) on the OLED display panel package to reduce the OLED display panel's reflection of ambient light. Alternatively, a low-refractive-index film layer stacked with a high-refractive-index film layer can be used to form an enhanced lens structure to improve light extraction efficiency. However, finding a more effective way to improve the display quality of OLED display panels has become a pressing technical challenge.

[0004] Summary of the Invention

[0005] The present disclosure provides a display panel and a display device, the specific solutions of which are as follows:

[0006] An embodiment of the present disclosure provides a display panel, comprising:

[0007] A driving backplane, a light-emitting layer located on the driving backplane, and a color filter layer located on a side of the light-emitting layer facing away from the driving backplane;

[0008] In which, the light-emitting layer includes a plurality of light-emitting units, each of which includes a plurality of light-emitting devices with different light-emitting colors; the color filter layer includes a shading portion, a plurality of filter portions surrounded by the shading portion, and an enhancement portion surrounding the plurality of filter portions; the enhancement portion has a plurality of openings, the plurality of openings and the plurality of filter portions are arranged corresponding to the plurality of light-emitting devices, and the enhancement portion at least partially overlaps with the shading portion, and the refractive index of the enhancement portion is less than the refractive index of the filter portion.

[0009] Optionally, in the embodiment of the present disclosure, along a direction parallel to the plane where the driving back plate is located, the cross-sectional area of ​​the enhancement portion tends to decrease along the light emitting direction of the light emitting layer.

[0010] Optionally, in an embodiment of the present disclosure, along a direction perpendicular to the plane where the driving back plate is located, the reinforcement portion has a bottom surface and a top surface that are oppositely arranged, and at least one step located between the bottom surface and the top surface.

[0011] Optionally, in an embodiment of the present disclosure, the at least one step includes a first step close to the drive back plate and a second step away from the drive back plate; the reinforcement portion has a first side wall respectively connected to the first step and the bottom surface, and a second side wall respectively connected to the second step and the top surface, a first inclination angle is formed between the plane where the first side wall is located and a plane parallel to the bottom surface, a second inclination angle is formed between the plane where the second side wall is located and a plane parallel to the bottom surface, the first inclination angle is greater than the second inclination angle, and both are less than 90°.

[0012] Optionally, in the embodiment of the present disclosure, the multiple filtering parts and the enhancing part are arranged in the same layer.

[0013] Optionally, in the embodiment of the present disclosure, the thickness of the filter portion is greater than or equal to the thickness of the enhancement portion.

[0014] Optionally, in the embodiment of the present disclosure, the light shielding portion is located on a side of the reinforcing portion away from the driving back plate.

[0015] Optionally, in the embodiment of the present disclosure, the light shielding portion covers the top surface, and an orthographic projection of the light shielding portion on the driving backplane does not overlap with an orthographic projection of the first side wall on the driving backplane.

[0016] Optionally, in an embodiment of the present disclosure, the light shielding portion is located on a side of the first step and the second step away from the driving back plate.

[0017] Optionally, in an embodiment of the present disclosure, a first groove is provided on the top surface, the shading portion is accommodated in the first groove, and the orthographic projection of the shading portion on the driving backplane completely falls within the area of ​​the orthographic projection of the bottom surface on the driving backplane.

[0018] Optionally, in the embodiment of the present disclosure, the light-shielding portion is a black matrix, or the light-shielding portion is a composite structure formed by stacking pigments of different colors.

[0019] Optionally, in the embodiment of the present disclosure, a step is provided between the top surface and the bottom surface, and a second groove is provided on the top surface, the filter portion is accommodated in the second groove, the shading portion is provided in contact with the step, and the orthographic projection of the filter portion on the driving backplane and the orthographic projection of the shading portion on the driving backplane do not overlap with each other.

[0020] Optionally, in the embodiment of the present disclosure, the thickness of the filter portion is smaller than the thickness of the light shielding portion.

[0021] Optionally, in an embodiment of the present disclosure, a step is provided between the top surface and the bottom surface, and the shading portion and the filtering portion are intermittently provided, and the orthographic projection of the gap between the shading portion and the filtering portion on the driving backplane completely falls within the area of ​​the orthographic projection of the enhancing portion on the driving backplane.

[0022] Optionally, in the embodiment of the present disclosure, the shading portion is a composite structure formed by stacking pigments of different colors.

[0023] The present disclosure also provides a display device, comprising:

[0024] A display panel as described in any one of the above. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is a schematic diagram of a structure of an OLED display panel in the related art;

[0026] FIG2 is a schematic diagram of a structure of an OLED display panel in the related art;

[0027] FIG3 is a schematic diagram of a structure of an OLED display panel in the related art;

[0028] FIG4 is a schematic diagram of a partial top view of a display panel provided in an embodiment of the present disclosure;

[0029] FIG5 is a schematic diagram of a cross-sectional structure taken along the direction indicated by MM in FIG4 ;

[0030] FIG6 is a schematic structural diagram of a display panel provided in an embodiment of the present disclosure;

[0031] FIG7 is a schematic structural diagram of a display panel provided in an embodiment of the present disclosure;

[0032] FIG8 is a schematic structural diagram of a display panel provided in an embodiment of the present disclosure;

[0033] FIG9 is a flow chart of one of the manufacturing processes of the display panel shown in FIG8 ;

[0034] FIG10 is a schematic structural diagram of a display panel provided in an embodiment of the present disclosure;

[0035] FIG11 is a schematic structural diagram of a display panel provided in an embodiment of the present disclosure;

[0036] FIG. 12 is a schematic diagram of a top view of a structure corresponding to FIG. 11 . DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. And in the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0038] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the usual meanings understood by people with ordinary skills in the field to which this disclosure belongs. The words "first", "second" and similar terms used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Inside", "outside", "upper", "lower" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0039] It should be noted that the sizes and shapes of the figures in the accompanying drawings do not reflect the actual scale and are only for the purpose of illustrating the present disclosure. The same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions.

[0040] In related technologies, in order to improve the display quality of OLED display panels, a polarizer or a thinner color filter (CF) can be set on the package of the OLED display panel to reduce the reflection of ambient light by the OLED display panel. Among them, setting a thinner CF on the package of the OLED display panel corresponds to a polarizer-free technology, namely a COE (Color filter On Encapsulation) structure; a low-refractive-index film layer can also be superimposed on a high-refractive-index film layer to form an enhanced lens structure to achieve an EES (Efficiency Enhance Structure) structure, thereby improving light extraction efficiency.

[0041] In order to effectively improve the display quality of OLED display panels, the inventors have discovered that the structures shown in Figures 1 to 3 can be used to design OLED display panels based on polarizer-free technology. In the exemplary embodiment shown in Figure 1, the enhanced lens structure (i.e., EES structure) 03, formed by stacking a low-refractive-index film layer 01 with a high-refractive-index film layer 02, can be directly disposed on the side of the CF 05 located on the encapsulation layer 04 that faces away from the substrate 06. In the exemplary embodiment shown in Figure 2, the low-refractive-index film layer 01 can be disposed on the side of the black matrix (BM) 07 in the CF 05 that faces away from the substrate 06, and the filter structure in the CF 05 can be disposed as the high-refractive-index film layer 02. In this way, the COE structure combines the functions of the EES structure. In the exemplary embodiment shown in Figure 3, the enhanced lens structure 03, formed by stacking a low-refractive-index film layer 01 with a high-refractive-index film layer 02, can be directly disposed on the side of the CF 05 that faces away from the substrate 06, and the BM 07 can be disposed on the low-refractive-index film layer 01. By comparing the exemplary embodiments shown in Figures 1 to 3, the inventors found that the exemplary embodiment shown in Figure 3 can effectively reduce the reflectivity of ambient light, and has better dark state effect and color separation effect than the exemplary embodiments shown in Figures 1 and 2.

[0042] In view of this, embodiments of the present disclosure provide a display panel and a display device for effectively improving the display quality of the display panel.

[0043] As shown in FIG4 and FIG5 , FIG4 is a schematic diagram of a partial top view of a display panel provided in an embodiment of the present disclosure, and FIG5 is a schematic diagram of a cross-sectional structure along the direction indicated by line MM in FIG4 ; specifically, the display panel includes:

[0044] A driving backplane 10, a light-emitting layer 20 located on the driving backplane 10, and a color filter layer 30 located on a side of the light-emitting layer 20 facing away from the driving backplane 10;

[0045] In which, the light-emitting layer 20 includes a plurality of light-emitting units 21, each of the light-emitting units 21 includes a plurality of light-emitting devices 22 emitting different colors; the color filter layer 30 includes a shading portion 40, a plurality of filter portions 50 surrounded by the shading portion 40, and an enhancement portion 60 surrounding the plurality of filter portions 50; the enhancement portion 60 has a plurality of openings 70, the plurality of openings 70 and the plurality of filter portions 50 are both arranged corresponding to the plurality of light-emitting devices 22, and the enhancement portion 60 at least partially overlaps with the shading portion 40, and the refractive index of the enhancement portion 60 is less than the refractive index of the filter portion 50.

[0046] In a specific implementation, the display panel includes a driver backplane 10, a light-emitting layer 20, and a color filter layer 30. The light-emitting layer 20 is located on the driver backplane 10, and the color filter layer 30 is located on the side of the light-emitting layer 20 facing away from the driver backplane 10. The light-emitting layer 20 includes multiple light-emitting units 21, each of which includes multiple light-emitting devices 22 emitting different colors. Exemplarily, each light-emitting unit 21 includes a red light-emitting device, a green light-emitting device, and a blue light-emitting device, thereby ensuring a color display of the display panel. Each light-emitting device 22 includes a stacked anode layer 221, a light-emitting functional layer 222, and a cathode layer 223. Exemplarily, the light-emitting functional layer 222 may include a hole injection layer, a hole transport layer, a light-emitting material layer, an electron transport layer, and an electron injection layer stacked in sequence in a direction away from the driver backplane 10. Exemplarily, the light-emitting device 22 may be at least one of an organic light-emitting diode (OLED), a quantum dot light-emitting diode (QLED), a micro LED, and a mini LED. In addition, the driving backplane 10 has a pixel driving circuit for driving the light emitting device 22 to emit light. Generally, the pixel driving circuit includes multiple transistors such as a driving transistor and a switching transistor, and a storage capacitor. Its specific structure and working principle can be implemented by referring to the relevant technical implementation and will not be described in detail here.

[0047] The display panel in the embodiment of the present disclosure may be a flexible display panel. Of course, the display panel in the embodiment of the present disclosure may also be a display panel in other forms, which is not limited here.

[0048] As shown in FIG5 , the driver backplane 10 includes a substrate 11 and a driver circuit layer 12 located on the substrate 11. The substrate 11 can be made of either a hard or soft material, without limitation. Furthermore, the display panel can be divided into a display area and a peripheral area outside the display area. Accordingly, the driver circuit layer 12 can include a pixel driver circuit located within the display area and a peripheral circuit located within the peripheral area. For example, the pixel driver circuit can have a circuit structure such as 7T1C, 7T2C, or 6T1C, without limitation. Furthermore, each pixel driver circuit can be connected to each light-emitting device 22 in a one-to-one correspondence, thereby enabling separate control of the corresponding light-emitting device 22. Furthermore, the peripheral circuit is connected to the pixel driver circuit, and a drive signal can be input to the pixel driver circuit via the peripheral circuit to control the light emission of the corresponding light-emitting device 22. For example, the peripheral circuit includes a gate driver circuit and a light-emission control circuit. Of course, the specific structure of the peripheral circuit can be configured according to actual application needs. The specific configuration of the relevant circuit structure can be implemented with reference to relevant technologies and without limitation.

[0049] Exemplarily, the driving circuit layer 12 may include a semiconductor layer, a gate conductive layer, a capacitor electrode layer, a first conductive layer, and a second conductive layer. Furthermore, an insulating layer is provided between each two adjacent conductive film layers; the two conductive film layers to be coupled can be coupled to each other via vias penetrating the respective insulating layers. The specific configuration of the relevant film layers can be implemented with reference to related technologies and will not be detailed here.

[0050] Exemplarily, the semiconductor layer includes the active layer of the aforementioned transistor; the semiconductor layer can be patterned using a semiconductor material. Accordingly, the semiconductor layer can be used to form the active layer of the aforementioned transistor. In specific implementations, the semiconductor layer can be made of amorphous silicon, polycrystalline silicon, oxide semiconductor materials, and the like.

[0051] Exemplarily, the gate conductive layer includes the gate and gate line of the aforementioned transistor. The gates of some transistors are reused as one plate of a capacitor. The capacitor electrode layer may include another plate of the aforementioned capacitor, so that two plates with facing areas form a capacitor.

[0052] Exemplarily, the first conductive layer includes a data line connected to the pixel driving circuit, and the second conductive layer includes an initialization signal line and a power signal line connected to the pixel driving circuit; of course, the relevant film layer structure in the driving circuit layer 12 can also be set according to actual application needs, which will not be described in detail here.

[0053] Still referring to FIG5 , the display panel further includes a planarization layer 13 located on the side of the driving circuit layer 12 facing away from the driving backplane 10, and a pixel defining layer 14 located on the side of the planarization layer 13 facing away from the driving backplane 10; wherein the pixel defining layer 14 is provided with a plurality of openings, and each light-emitting device 22 is accommodated in a corresponding opening. In addition, the display panel further includes a thin film encapsulation layer 15 located on the side of the light-emitting layer 20 facing away from the driving backplane 10. Exemplarily, the thin film encapsulation layer 15 may include a first inorganic layer, an organic layer, and a second inorganic layer sequentially arranged away from the driving backplane 10; exemplarily, the material of the first inorganic layer may be at least one of silicon oxide, silicon nitride, and silicon oxynitride, the material of the second inorganic layer may be at least one of silicon oxide, silicon nitride, and silicon oxynitride, and the material of the organic layer may be an organic material suitable for inkjet printing, which is not limited here. Of course, the thin film encapsulation layer 15 may also include more film layers in which inorganic layers and organic layers are alternately arranged, which is not limited here. It should be noted that regardless of the structure of the thin-film encapsulation layer 15, the topmost layer of the thin-film encapsulation layer 15 is configured as an inorganic encapsulation layer to effectively block water and oxygen. Furthermore, the color filter layer 30 is located on the side of the thin-film encapsulation layer 15 facing away from the substrate 11. Furthermore, the display panel also includes a cover plate 16 located on the side of the color filter layer 30 facing away from the substrate 11.

[0054] In a specific embodiment, the color filter layer 30 includes a light shielding portion 40, multiple filter portions 50 surrounded by the light shielding portion 40, and an enhancement portion 60 surrounding the multiple filter portions 50. The filter portions 50 are provided in a one-to-one correspondence with the light-emitting devices 22. Because the light shielding portion 40 surrounds the multiple filter portions 50, the multiple filter portions 50, the enhancement portion 60, and the light shielding portion 40 form a non-polarized structure. This effectively absorbs ambient light through the light shielding portion 40, thereby reducing reflectivity. Because the enhancement portion 60 surrounds the multiple filter portions 50, even light from the side view of the light-emitting devices 22 is easily totally reflected by the enhancement portion 60, thereby increasing the light output efficiency at the front view angle and boosting the brightness of the emitted light. Furthermore, the enhancement portion 60 has multiple openings, and the multiple openings and the multiple filter portions 50 are each provided corresponding to the multiple light-emitting devices 22. The specific number of the multiple light-emitting devices 22 can be set according to actual application needs and is not limited here. In addition, the enhancement part 60 at least partially overlaps with the shading part 40. In this way, the light extraction efficiency at the normal viewing angle can be improved while taking into account the dark effect. Moreover, the refractive index of the enhancement part 60 is less than the refractive index of the filter part 50. In this way, the enhancement part 60 and the filter part 50 can form an enhanced lens structure. Exemplarily, the refractive index of the enhancement part 60 is 1.47, and the refractive index of the filter part 50 is 1.6. In this way, when the light from the light-emitting device 22 is incident on the enhancement part 60 through the filter part 50, the light is very likely to be totally reflected at the interface where the filter part 50 and the enhancement part 60 intersect, thereby improving the light extraction efficiency at the normal viewing angle. In this way, the display quality of the display panel is effectively improved.

[0055] It should be noted that, in the embodiment of the present disclosure, there is no limitation on the material of the reinforcing portion 60. For example, the material of the reinforcing portion 60 may be an optical adhesive with a low refractive index.

[0056] In the embodiment of the present disclosure, as shown in FIG. 5 to FIG. 10 , along a direction parallel to the plane where the driving backplane 10 is located, the cross-sectional area of ​​the reinforcing portion 60 tends to decrease along the light emitting direction of the light emitting layer 20 .

[0057] In the embodiment of the present disclosure, still in combination with Figures 5 to 10, along the direction perpendicular to the plane where the drive back plate 10 is located, the reinforcement portion 60 has a bottom surface 61 and a top surface 62 that are relatively arranged, and at least one step 80 located between the bottom surface 61 and the top surface 62. Among them, the at least one step 80 can be one or more, and the specific number can be set according to actual application needs and is not limited here. It should be noted that in the embodiment of the present disclosure, unless otherwise specified, the direction indicated by the arrow X in the figure is the direction parallel to the plane where the drive back plate 10 is located, and the direction indicated by the arrow Y is the direction perpendicular to the plane where the drive back plate 10 is located.

[0058] In order to more clearly illustrate the specific structure of each film layer in the display panel, corresponding explanations are given below in conjunction with specific embodiments.

[0059] In the exemplary embodiments shown in Figures 5, 6, 7 and 10, the at least one step 80 includes a first step 81 close to the drive back plate 10 and a second step 82 away from the drive back plate 10; the reinforcement portion 60 has a first side wall 63 respectively connected to the first step 81 and the bottom surface 61, and a second side wall 64 respectively connected to the second step 82 and the top surface 62, a first inclination angle θ1 is formed between the plane where the first side wall 63 is located and a plane parallel to the bottom surface 61, a second inclination angle θ2 is formed between the plane where the second side wall 64 is located and a plane parallel to the bottom surface 61, the first inclination angle θ1 is greater than the second inclination angle θ2, and both are less than 90°.

[0060] Still referring to the exemplary embodiment shown in FIG. 5 , a first step 81 and a second step 82 are defined between the top surface 62 and the bottom surface 61 of the reinforcing portion 60. The second step 82 is disposed away from the driving backplate 10 compared to the first step 81. Furthermore, the reinforcing portion 60 has a first sidewall 63 that connects to the first step 81 and the bottom surface 61, respectively, and a second sidewall 64 that connects to the second step 82 and the top surface 62, respectively. Both the first sidewall 63 and the second sidewall 64 are disposed in contact with the adjacent filter portion 50. Furthermore, a first inclination angle θ1 is formed between the plane of the first sidewall 63 and a plane parallel to the bottom surface 61, and a second inclination angle θ2 is formed between the plane of the second sidewall 64 and a plane parallel to the bottom surface 61. The first inclination angle θ1 is greater than the second inclination angle θ2, and both are less than 90°.

[0061] Exemplarily, the filter section 50 includes a red color block R corresponding to a red light-emitting device, a green color block G corresponding to a green light-emitting device, and a blue color block B corresponding to a blue light-emitting device. For example, the refractive index of the enhancement section 60 is 1.47, the thickness of the first step 81 ranges from 1 μm to 2 μm, and the thickness of the second step 82 ranges from 1 μm to 3 μm. The refractive index of the red color block R at a characteristic wavelength of 550 nm is 1.7; the refractive index of the green color block G at a characteristic wavelength of 550 nm is 1.6; and the refractive index of the blue color block B at a characteristic wavelength of 550 nm is 1.59. Accordingly, the refractive indices of the red color block R, the green color block G, and the blue color block B are all greater than the refractive index of the enhancement section 60. Furthermore, the first inclination angle θ1 between the plane of the first sidewall 63 and the plane parallel to the bottom surface 61 has a numerical range of 65° to 85°; the second inclination angle θ2 between the plane of the second sidewall 64 and the plane parallel to the bottom surface 61 has a numerical range of 45° to 65°. Furthermore, the bottom boundary of the second step 82 is inset inward from the top boundary of the first step 81 by a predetermined distance, and the numerical range of the predetermined distance is greater than or equal to 1 μm, and illustratively, the numerical range is 2 μm to 4 μm. Exemplarily, the thickness of the filter portion 50 is greater than or equal to the thickness of the enhancement portion 60. For the exemplary embodiment shown in FIG. 5 , the specific numerical values ​​of each structure can be set according to actual application needs and are not limited here.

[0062] It should be noted that in the exemplary embodiment shown in Figure 5, the shading portion 40 is located on the side of the enhancing portion 60 away from the driving backplane 10, and the center of the orthographic projection of the enhancing portion 60 on the driving backplane 10 coincides with the center of the orthographic projection of the pixel defining layer 14 on the driving backplane 10. Exemplarily, the material of the shading portion 40 can be BM. In this way, the light from the light-emitting device 22 at an oblique angle can easily be totally reflected at each step, thereby improving the light extraction efficiency at a normal angle. Moreover, since the shading portion 40 is located on the side of the enhancing portion 60 away from the driving backplane 10, the reflectivity of the ambient light is reduced.

[0063] Continuing with the exemplary embodiment shown in FIG. 5 , the specific principles for improving the light extraction efficiency at normal viewing angles are explained using light rays ①, ②, and ③ as examples. For light ①, entering the first step 81 from the filter portion 50 is equivalent to entering an optically less dense medium from an optically dense medium. Light ① is directly reflected by the first sidewall 63. For light ②, the angle of incidence on the first sidewall 63 is relatively small, so light ② is refracted by the first sidewall 63. Furthermore, the angle of refraction is greater than the angle of incidence. Consequently, after reaching the top of the first step 81, light ② is refracted again. This allows the refracted light to easily reach the critical angle for total internal reflection on the second sidewall 64, resulting in total internal reflection. For light ③, directly incident on the second sidewall 64, light ③ is first refracted at the interface between the thin-film encapsulation layer 15 and the filter portion 50. After this refracted light is then reflected by the second sidewall 64. This improves the light extraction efficiency of the light-emitting device 22 at normal viewing angles. In actual applications, in the exemplary embodiment shown in FIG5 , in addition to light ①, light ②, and light ③, there are many other light rays, which will not be described in detail here.

[0064] Regarding the actual manufacturing process of the display panel shown in FIG5 , after completing the packaging process on the driver backplane 10, a half-tone mask (HTM) process is used to manufacture the enhancement portion 60 consisting of a first step 81 and a second step 82. The first step 81 and the second step 82 can also be manufactured in two layers. Then, red, green, and blue resin materials are placed above the opening of the pixel defining layer 14 and in the opening 70 of the enhancement portion 60 to form a red color block R corresponding to the red light-emitting device, a green color block G corresponding to the green light-emitting device, and a blue color block B corresponding to the blue light-emitting device, thereby obtaining the desired filter portion 50. Then, a resin material for preparing a black matrix is ​​used on the top surface 62 of the second step 82 to form the light shielding portion 40 of the desired structure. Then, a cover plate 16 is placed on the side of the filter portion 50, the light shielding portion 40, and the enhancement portion 60 facing away from the driver backplane 10. For example, the material of the cover plate and the material of the enhancement portion 60 can be the same. In addition, the light shielding portion 40 may be prepared after the light filtering portion 50 is prepared. Of course, in a specific implementation process, the display panel shown in FIG. 5 may also be prepared according to actual application needs, which is not limited here.

[0065] For the display panel shown in FIG6 , the first step 81 and the second step 82 of the enhancement portion 60, as well as the filter portion 50 and other related structural parameters can be substantially the same as those shown in FIG5 . The difference is that in the exemplary embodiment shown in FIG6 , the light shielding portion 40 is located on the side of the first step 81 and the second step 82 facing away from the drive backplane 10 ; accordingly, in addition to being located on the top surface 62 of the enhancement portion 60 , the light shielding portion 40 can also be located on other areas of the top of the first step 81 excluding the intersection with the bottom of the second step 82 . In the exemplary embodiment shown in FIG6 , the area where the light shielding portion 40 is set can be larger than that in FIG5 . In this way, the reflectivity of ambient light is lower, the integrated black effect is better, and the dark state performance is better.

[0066] For the display panel shown in FIG7 , the first and second steps 81 and 82 of the enhancement portion 60, as well as the filter portion 50 and other related structural parameters, can be substantially the same as those shown in FIG5 . However, in the exemplary embodiment shown in FIG7 , the top surface 62 defines a first groove 90 , within which the light shielding portion 40 is accommodated. Furthermore, the orthographic projection of the light shielding portion 40 on the driver backplane 10 completely falls within the orthographic projection of the bottom surface 61 on the driver backplane 10 . Consequently, during the actual manufacturing process, the light shielding portion 40 can be effectively confined within the first groove 90 , preventing material associated with the light shielding portion 40 from remaining on the sidewalls. This ensures that the enhancement portion 60 fully reflects light from the light-emitting device 22 at side angles, improving the light output efficiency at front angles and increasing the brightness of the light. It should be noted that in the exemplary embodiment shown in FIG7 , the arrows in the figure indicate the transmission paths of the relevant light rays. Of course, there are many other light rays, which are not described in detail here.

[0067] For the display panel shown in FIG10 , compared to FIG5 , the first step 81 and the second step 82 of the enhancement portion 60, as well as the filter portion 50 and other related structural parameters can be substantially the same. The difference is that in the exemplary embodiment shown in FIG10 , the top surface 62 is provided with a first groove 90 , the light shielding portion 40 is accommodated within the first groove 90 , and the orthographic projection of the light shielding portion 40 on the driver backplane 10 completely falls within the area of ​​the orthographic projection of the bottom surface 61 on the driver backplane 10 .

[0068] It should be noted that in the exemplary embodiments shown in Figures 5 to 7, the shading portion 40 can be a black matrix. In the exemplary embodiment shown in Figure 10, the shading portion 40 can be a composite structure formed by stacking pigments of different colors. For example, in the first groove 90 opened in the top surface 62, red resin material, green resin material and blue resin material are stacked in sequence. According to color subtraction, the composite structure formed by the stacking of the three can effectively absorb ambient light, thereby reducing the reflectivity of ambient light. It should be noted that in the exemplary embodiment shown in Figure 10, the relevant arrows in the figure represent the transmission path of the relevant light. Of course, there are many other light rays, which are not described in detail here.

[0069] In the embodiment shown in Figures 8 and 9, a step is provided between the top surface 62 and the bottom surface 61, and a second groove 92 is opened on the top surface 62, the filter portion 50 is accommodated in the second groove 92, and the shading portion 40 is provided in contact with the step, and the orthographic projection of the filter portion 50 on the driving back plate 10 and the orthographic projection of the shading portion 40 on the driving back plate 10 do not overlap with each other.

[0070] Continuing with the exemplary embodiment shown in FIG8 , a step is provided between the top surface 62 and the bottom surface 61 of the reinforcing portion 60 , and a second groove 92 is defined in the top surface 62. The filter portion 50 is accommodated in the second groove 92 , and the light shielding portion 40 is disposed in contact with the step. Thus, the plane of the sidewall of the light shielding portion 40 in contact with the step has only one inclination angle with a plane parallel to the bottom surface 61; illustratively, the value of this inclination angle ranges from 45° to 75°. Furthermore, the orthographic projection of the filter portion 50 on the driver backplane 10 does not overlap with the orthographic projection of the light shielding portion 40 on the driver backplane 10.

[0071] FIG9 is a flow chart of one of the manufacturing processes for the display panel shown in FIG8 . First, after the encapsulation process is completed on the driver backplane 10, a mask plate and a negative photoresist used to prepare the pixel defining layer 14 are used to form a raised structure above the opening of the pixel defining layer 14. Then, a lens of the desired structure is formed on the raised structure using a masking process, thereby obtaining a reinforcement portion 60 of the desired structure. The solid material area of ​​the reinforcement portion 60 is located on both sides of the raised structure. Then, red resin material, green resin material, and blue resin material are sequentially stacked within the opening of the reinforcement portion 60. Accordingly, in the area of ​​the raised structure other than the solid material area, a resin material having the same color as the corresponding light-emitting device 22 is provided to form a color block of the same color as the light-emitting device 22, thereby forming a filter portion 50 of the desired structure. Exemplarily, the thickness of the raised structure ranges from 2 μm to 5 μm, and the orthographic projection area of ​​the raised structure on the driver backplane 10 is greater than or equal to the orthographic projection area of ​​the opening of the pixel defining layer 14 on the driver backplane 10, thereby ensuring the light extraction efficiency of the display panel.

[0072] It should be noted that in the exemplary embodiments shown in Figures 8 and 9 , because the red, green, and blue resin materials corresponding to the filter portion 50 all have higher refractive indices than the reinforcing portion 60, even oblique-angle light emitted by the light-emitting device 22 is easily totally reflected at the interface between the reinforcing portion 60 and the filter portion 50, thereby improving light extraction efficiency at normal viewing angles. The exemplary embodiment shown in Figure 8 illustrates the transmission paths of light rays ④ and ⑤. In actual applications, in addition to light rays ④ and ⑤, various other light rays may exist in the exemplary embodiment shown in Figure 8 , which will not be described in detail here.

[0073] In the exemplary embodiment shown in FIG11 , a step is provided between the top surface 62 and the bottom surface 61, and the shading portion 40 and the filtering portion 50 are intermittently provided, and the orthographic projection of the gap between the shading portion 40 and the filtering portion 50 on the driving back plate 10 completely falls within the area of ​​the orthographic projection of the enhancing portion 60 on the driving back plate 10. In the exemplary embodiment shown in FIG11 , the transmission paths of light ⑥ and light ⑦ are schematically illustrated. In actual applications, in addition to light ⑥ and light ⑦, there are many other light rays in the exemplary embodiment shown in FIG11 , which are not described in detail here. FIG12 is a schematic diagram of a top view structure corresponding to FIG11 .

[0074] Continuing with the exemplary embodiment shown in FIG11 , a step is provided between the top surface 62 and the bottom surface 61 of the reinforcing portion 60 . Furthermore, the top surface 62 of the reinforcing portion 60 does not include a groove structure. Furthermore, the light shielding portion 40 and the light filter portion 50 are intermittently disposed, and the orthographic projection of the gap between the light shielding portion 40 and the light filter portion 50 on the driver backplane 10 completely falls within the orthographic projection of the reinforcing portion 60 on the driver backplane 10. This ensures the flatness of subsequent film layers and improves the performance of the display panel. Furthermore, in this exemplary embodiment, the light shielding portion 40 may be a composite structure formed by stacking pigments of different colors.

[0075] The actual manufacturing process for the display panel shown in FIG11 can be as follows: after completing the encapsulation process on the driver backplane 10, a mask plate used to prepare the reinforcement structure and the corresponding resin material are used to form a reinforcement portion 60 of the desired shape on the side of the thin-film encapsulation layer 15 facing away from the driver backplane 10. This reinforcement portion 60 is located on the side of the corresponding pixel defining layer 14 near the light-emitting device 22. Except for the area where the reinforcement portion 60 is located, no solid material is provided in the area above the pixel defining layer 14. Then, using an HTM mask plate and red, green, and blue resin materials, a filter portion 50 is provided within the opening of the reinforcement portion 60 corresponding to the light-emitting device 22. Red, green, and blue resin materials are sequentially stacked in the areas above the pixel defining layer 14 except for the reinforcement portion 60, thereby forming the desired light shielding portion 40. In actual applications, the thickness of the light shielding portion 40 is less than that of the filter portion 50, thereby ensuring the flatness of subsequent film layers and improving the performance of the display panel. Exemplarily, the projection width of the reinforcing portion 60 on the driving backplane 10 is in the range of 2μm to 5μm, and its thickness is in the range of 2μm to 3μm; the inclination angle between the plane where the side wall of the reinforcing portion 60 contacts the shading portion 40 and the plane where the bottom surface 61 is located is in the range of 45° to 75°; the thickness of the shading portion 40 is in the range of 2μm to 3μm; of course, the relevant structural parameters can also be set according to actual application needs, and are not limited here.

[0076] It should be noted that the display panel provided by the embodiment of the present disclosure may include, in addition to the aforementioned film layers, other film layer structures according to actual application needs, which are not limited here. For example, a touch layer is provided between the thin film encapsulation layer 15 and the color filter layer 30. The specific configuration can be implemented by referring to relevant technologies.

[0077] Based on the same disclosed concept, an embodiment of the present disclosure further provides a display device, which includes the above-mentioned display panel provided by an embodiment of the present disclosure.

[0078] Since the principle of solving the problem of the display device is similar to that of the aforementioned display panel, the implementation of the display device can refer to the implementation of the aforementioned display panel, and the repeated parts are not repeated here.

[0079] In specific implementations, the display device provided by the embodiments of the present invention can be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigation system, or the like. Other essential components of the display device are well understood by those skilled in the art and are not described in detail here, nor should they be construed as limitations of the present invention.

[0080] Although the preferred embodiments of the present disclosure have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present disclosure.

[0081] Obviously, those skilled in the art may make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is intended to include these modifications and variations.

Claims

1. A display panel, wherein: include: A driving backplane, a light-emitting layer located on the driving backplane, and a color filter layer located on a side of the light-emitting layer facing away from the driving backplane; Wherein, the light-emitting layer includes a plurality of light-emitting units, and each of the light-emitting units includes a plurality of light-emitting devices with different light-emitting colors; The color filter layer includes a shading portion, a plurality of filtering portions surrounded by the shading portion, and an enhancement portion surrounding the plurality of filtering portions; the enhancement portion has a plurality of openings, the plurality of openings and the plurality of filtering portions are arranged corresponding to the plurality of light-emitting devices, and the enhancement portion at least partially overlaps with the shading portion, and the refractive index of the enhancement portion is less than the refractive index of the filtering portion.

2. The display panel according to claim 1, wherein: Along a direction parallel to the plane where the driving back plate is located, the cross-sectional area of the enhancement portion tends to decrease along the light emitting direction of the light emitting layer.

3. The display panel according to claim 2, wherein: Along a direction perpendicular to the plane where the driving back plate is located, the reinforcement portion has a bottom surface and a top surface that are oppositely arranged, and at least one step located between the bottom surface and the top surface.

4. The display panel according to claim 3, wherein: The at least one step includes a first step close to the driving back plate and a second step away from the driving back plate; the reinforcing portion has a first side wall respectively connected to the first step and the bottom surface, and a second side wall respectively connected to the second step and the top surface, a first inclination angle is formed between the plane where the first side wall is located and a plane parallel to the bottom surface, a second inclination angle is formed between the plane where the second side wall is located and a plane parallel to the bottom surface, the first inclination angle is greater than the second inclination angle, and both are less than 90°.

5. The display panel according to claim 3, wherein: The plurality of filter parts and the enhancement part are arranged in the same layer.

6. The display panel according to claim 5, wherein: The thickness of the filter portion is greater than or equal to the thickness of the enhancement portion.

7. The display panel according to claim 6, wherein: The light shielding portion is located on a side of the reinforcing portion away from the driving back plate.

8. The display panel according to claim 7, wherein: The light shielding portion covers the top surface, and an orthographic projection of the light shielding portion on the driving backplane does not overlap with an orthographic projection of the first side wall on the driving backplane.

9. The display panel according to claim 7, wherein: The light shielding portion is located on a side of the first step and the second step away from the driving back plate.

10. The display panel according to claim 7, wherein: The top surface is provided with a first groove, the light shielding portion is accommodated in the first groove, and the orthographic projection of the light shielding portion on the driving backplane completely falls within the area of the orthographic projection of the bottom surface on the driving backplane.

11. The display panel according to claim 10, wherein: The light shielding portion is a black matrix, or the light shielding portion is a composite structure formed by stacking pigments of different colors.

12. The display panel according to claim 3, wherein: A step is provided between the top surface and the bottom surface, and a second groove is provided on the top surface. The filter portion is accommodated in the second groove, and the shading portion is provided in contact with the step. The orthographic projection of the filter portion on the driving backplane and the orthographic projection of the shading portion on the driving backplane do not overlap with each other.

13. The display panel according to claim 12, wherein: The thickness of the filter portion is smaller than the thickness of the light shielding portion.

14. The display panel according to claim 6, wherein: A step is provided between the top surface and the bottom surface, and the shading portion and the filtering portion are intermittently provided, and the orthographic projection of the gap between the shading portion and the filtering portion on the driving backplane completely falls within the area of the orthographic projection of the enhancing portion on the driving backplane.

15. The display panel according to any one of claims 12 to 14, wherein: The light-shielding portion is a composite structure formed by stacking pigments of different colors.

16. A display device, wherein: include: The display panel according to any one of claims 1 to 15.

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