Display panel and display device

Abstract

The application provides a display panel and a display device, and relates to the technical field of display, which comprises a substrate, a plurality of light emitting devices, a pixel definition layer and a photoelectric generation structure. The pixel definition layer is arranged on the substrate and defines a plurality of openings, and each opening is provided with a light emitting device. Each light emitting device comprises a first electrode, a light emitting functional layer and a second electrode which are sequentially stacked on the substrate. The photoelectric generation structure is connected with the second electrode and comprises at least one photoelectric generation unit, and the orthographic projection of the photoelectric generation unit on the substrate falls outside the orthographic projection of the first electrode on the substrate. The photoelectric generation structure is arranged to pressurize the second electrode, so as to improve the problem of uneven brightness of the display panel caused by uneven current of the second electrode.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display panel and a display device having the same. BACKGROUND

[0002] Organic light-emitting diode (OLED) is applied to the display field due to many advantages. However, with the continuous development of display technology, people's requirements for display products are getting higher and higher, therefore, the problems existing in the application of OLED to the display field need to be solved. For example, in the OLED panel, especially in the large-size top-emitting OLED panel, the voltage drop at different positions of the cathode layer is inconsistent due to the thinness of the cathode layer, so that the current is unevenly distributed in the display area, and therefore the phenomenon of dark in the middle and bright around in the display area occurs in the OLED panel, that is, the problem of poor display brightness uniformity occurs.

[0003] Therefore, a new technical solution is continuously provided to solve the problem of poor display brightness uniformity caused by the uneven distribution of current in the display area due to the thinness of the second electrode. SUMMARY

[0004] The first aspect of the present application provides a display panel, which comprises a substrate, a plurality of light-emitting devices, a pixel definition layer and a photoelectric generation structure. The pixel definition layer is arranged on the substrate and defines a plurality of openings, and each opening is provided with a light-emitting device. Each light-emitting device comprises a first electrode, a light-emitting functional layer and a second electrode which are sequentially stacked on the substrate. The photoelectric generation structure is connected with the second electrode, and the photoelectric generation structure comprises at least one photoelectric generation unit, and the orthographic projection of the photoelectric generation unit on the substrate falls outside the orthographic projection of the first electrode on the substrate.

[0005] In the above-mentioned solution, the photoelectric generation structure cooperates with the second electrode to form a photoelectric generation cell, and the light is converted into electricity and then transmitted to the second electrode, thereby improving the uniformity of voltage distribution on the second electrode, and thus improving the problem of uneven brightness of the display panel caused by the thinness of the second electrode.

[0006] In combination with the first aspect, the photoelectric generation structure is located on the side of the pixel definition layer away from the substrate, and further, the side of the pixel definition layer away from the substrate is defined with at least one recess, and the photoelectric generation structure is located in the recess.

[0007] In the above scheme, the photoelectric generation structure is arranged on the pixel defining layer, which not only facilitates the connection of the photoelectric generation structure and the second electrode, but also reduces the influence of the manufacturing of the photoelectric generation structure on the performance of the light emitting device. Further, the photoelectric generation structure is arranged in the groove at the periphery of the opening defined by the pixel defining layer, which reduces the thinning of the display panel caused by the arrangement of the photoelectric generation structure.

[0008] In combination with the first aspect, in some embodiments, the pixel defining layer defines at least one through slot at the periphery of the opening, and the photoelectric generation structure is located in the through slot.

[0009] In the above scheme, the through slot and the opening can be manufactured simultaneously in one process step, thereby saving the production process.

[0010] In combination with the first aspect, in some embodiments, the photoelectric generation structure further comprises a third electrode, the third electrode is located on the side of the photoelectric generation unit away from the substrate, and is connected with the photoelectric generation unit.

[0011] In combination with the first aspect, in some embodiments, the second electrode has a projection on the substrate which coincides with the projection of the plurality of openings and the pixel defining layer on the substrate. The photoelectric generation unit is located on the side of the second electrode away from the substrate, and is located between the second electrode and the third electrode.

[0012] In the above scheme, the photoelectric generation unit is located between the third electrode and the second electrode, which facilitates the transmission of the electricity converted by the photoelectric generation unit to the second electrode, and further effectively improves the problem of uneven brightness of the display panel.

[0013] In combination with the first aspect, in some embodiments, the third electrode has a projection on the substrate which coincides with the projection of the photoelectric generation unit on the substrate.

[0014] In the above scheme, each photoelectric generation unit is correspondingly provided with a third electrode, thereby improving the independence of the photoelectric generation structure.

[0015] In combination with the first aspect, in some embodiments, the third electrode has a projection on the substrate which coincides with the projection of the plurality of openings and the pixel defining layer on the substrate, and the third electrode is a transparent electrode.

[0016] In the above scheme, by limiting the relationship between the projection of the third electrode on the substrate and the projection of the plurality of openings and the pixel defining layer on the substrate, not only can the problem of uneven brightness of the display panel be effectively improved, but also the second electrode can be protected.

[0017] In combination with the first aspect, in some embodiments, the third electrode is connected with the second electrode.

[0018] In the above scheme, the third electrode is in direct contact with the second electrode, and the electricity generated by the photoelectric generation unit can be more effectively transmitted to the second electrode.

[0019] In combination with the first aspect, in some embodiments, the display panel further comprises a fourth electrode located on the side of the photoelectric generation unit facing the substrate, and a projection of the fourth electrode on the substrate coincides with a projection of the photoelectric generation unit on the substrate.

[0020] In the above scheme, the fourth electrode is located between the photoelectric generation unit and the second electrode, so that the preparation process of the photoelectric generation unit does not affect the second electrode.

[0021] In combination with the first aspect, in some embodiments, the display panel further comprises a fourth electrode located between the photoelectric generation unit and the second electrode, a projection of the fourth electrode on the substrate coincides with a projection of the second electrode on the substrate, and the fourth electrode is a transparent electrode.

[0022] In the above scheme, the fourth electrode is in direct contact with the second electrode and covers the second electrode completely, which not only protects the second electrode completely, but also reduces the difficulty of preparing the fourth electrode and saves production costs.

[0023] In combination with the first aspect, in some embodiments, the display panel comprises a display area, and the photoelectric generation structure is arranged in the entire display area.

[0024] In combination with the first aspect, in some embodiments, the display panel comprises a display area, and the display area comprises a first sub-display area and a second sub-display area, the first sub-display area is arranged around the second sub-display area, and the photoelectric generation structure is arranged in the second sub-display area. Further, the second sub-display area is a middle area.

[0025] In the above scheme, the second electrode of the light emitting device in the second sub-display area is subjected to pressure boosting, which can reduce the brightness difference between the second sub-display area and the first sub-display area, thereby improving the problem of brightness non-uniformity of the display panel.

[0026] In combination with the first aspect, in some embodiments, the photoelectric generation structure comprises one photoelectric generation unit, and the photoelectric generation unit is in a grid shape.

[0027] In the above scheme, the photoelectric generation structure is arranged as one photoelectric generation unit in a grid shape, which is suitable for the case of arranging the photoelectric generation structure in the entire or part of the display area of the display panel, simplifies the manufacturing steps of the photoelectric generation structure, and saves production costs.

[0028] In some embodiments, the photoelectric generation structure includes a plurality of photoelectric generation units, and the plurality of light emitting devices are classified into light emitting devices emitting light of a plurality of wavelengths respectively, and the photoelectric generation units are arranged on the periphery of the light emitting devices emitting light of the shortest wavelength.

[0029] In the above scheme, each photoelectric generation unit of the photoelectric generation structure is an independent structure, which is more conducive to flexible arrangement of the photoelectric generation units. In addition, arranging the photoelectric generation units on the periphery of the light emitting devices with high driving voltage can more efficiently pressurize the second electrode area corresponding to the light emitting devices with high driving voltage.

[0030] In some embodiments, the display panel includes a display area and a non-display area, and further includes at least one driving chip arranged in the non-display area, the driving chip being configured to provide a driving signal for the light emitting device. The photoelectric generation structure is arranged in the display area, and the density of the photoelectric generation structure arranged in the display area close to the driving chip is smaller than the density of the photoelectric generation structure arranged in the display area far from the driving chip.

[0031] In the above scheme, the density of the photoelectric generation structure increases as the intensity of the driving signal decreases, which can better improve the problem of display unevenness caused by uneven current distribution.

[0032] The second aspect of the present application provides a display device, which includes the display panel of any one of the first aspect. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows.

[0034] Figure 1 is a cross-sectional view of a display panel according to an embodiment of the present application.

[0035] Figure 2 is a cross-sectional view of a display panel according to an embodiment of the present application.

[0036] Figure 3 is a cross-sectional view of a display panel according to another embodiment of the present application.

[0037] Figure 4 is a cross-sectional view of a display panel according to another embodiment of the present application.

[0038] Figure 5 is a cross-sectional view of a display panel according to another embodiment of the present application.

[0039] Figure 6 is a cross-sectional view of a display panel according to an embodiment of the present application.

[0040] Figure 7 is a cross-sectional view of a display panel according to another embodiment of the present application.

[0041] Figure 8 is a plan view of a display panel according to an embodiment of the present application.

[0042] Figure 9 is a plan view of a display panel according to an embodiment of the present application.

[0043] Figure 10 is a plan view of a display panel according to another embodiment of the present application.

[0044] Figure 11 is a plan view of a display panel according to another embodiment of the present application. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0046] In an OLED panel, a top-emitting OLED has many advantages such as high aperture ratio, high color purity, wide color gamut, and the like due to its unique micro-cavity structure, and has become the mainstream OLED panel display technology. However, since the light emitted by the OLED needs to pass through the cathode in the top-emitting mode, the thickness of the cathode needs to be made very thin to ensure the light transmittance. However, the thinning of the cathode film layer thickness will increase the surface resistance of the cathode. When the size of the OLED display screen is small, the voltage drop of the cathode can be ignored. However, when the size of the display screen is large, the voltage drop of the cathode cannot be ignored, which will cause the voltage drops at different positions of the cathode to be inconsistent, affecting the voltage difference between the anode and the cathode of the OLED, and ultimately affecting the brightness uniformity of the display device. Based on this, the present application provides a display panel, which is provided with a photoelectric generation structure connected with the cathode on the pixel definition layer to reduce the difference in voltage at different positions of the cathode, thereby improving the problem of brightness non-uniformity of the display panel.

[0047] The embodiment of the present application provides a display panel, which comprises a substrate, a plurality of light emitting devices, a pixel definition layer and a photoelectric generation structure. The plurality of light emitting devices are arranged on the substrate, and each light emitting device comprises a first electrode, a light emitting functional layer and a second electrode which are sequentially arranged on the substrate. The pixel definition layer is arranged on the substrate and is defined with a plurality of openings for defining the light emitting devices. The photoelectric generation structure is connected with the second electrode, the photoelectric generation structure comprises at least one photoelectric generation unit, and the orthographic projection of the photoelectric generation unit on the substrate is outside the orthographic projection of the first electrode on the substrate. The photoelectric generation structure cooperates with the second electrode to form a photoelectric generation cell, converts light irradiated thereon into an electric current, and supplements the second electrode with the electric current, so that the voltage drops of different positions of the second electrode are similar or the same, thereby improving the uniformity of the voltage difference between different positions of the second electrode and corresponding first electrodes, improving the uniformity of the current distribution in the display area, and improving the problem of poor brightness uniformity of the display panel caused by the thin second electrode. In addition, by limiting the relationship between the orthographic projection of the photoelectric generation unit and the light emitting layer on the substrate, it is ensured that the photoelectric generation unit does not cover the opening of the pixel definition layer, that is, the light emitting area of the display panel, so that the problem of poor brightness uniformity of the display panel is improved, and the efficiency of the display panel is not affected.

[0048] Exemplarily, as shown in the figure, Figure 1 The display panel comprises a substrate 100, a pixel definition layer 300 arranged on the substrate 100, and a plurality of openings 310 defined in the pixel definition layer 300, each opening 310 is provided with a light emitting device 200, each light emitting device 200 comprises a second electrode 210 located away from the substrate 100, a first electrode 230 located between the second electrode 210 and the substrate 100, and a light emitting functional layer 230 located between the second electrode 210 and the first electrode 230. Specifically, the first electrode 230 is an anode, and the second electrode 210 is a cathode. The photoelectric generation structure 400 and the second electrode 210, that is, the cathode, are connected, and the photoelectric generation structure 400 comprises at least one photoelectric generation unit 410, and the orthographic projection of the photoelectric generation unit 410 on the substrate 100 does not overlap with the orthographic projection of the first electrode 230, that is, the anode, on the substrate 100.

[0049] Based on the inventive concept of arranging the photoelectric generation structure with the photoelectric generation unit in the display panel, the specific design scheme of the photoelectric generation structure in the display panel will be introduced in combination with the specific structure of the display panel in the embodiment.

[0050] In some embodiments, the photoelectric generation structure is located on the side of the pixel definition layer away from the substrate. Exemplarily, as shown in the figure, Figure 1 The photoelectric generation unit 410 of the photoelectric generation structure 400 is located on the surface of the side of the pixel definition layer 300 away from the substrate 100.

[0051] Based on the comprehensive performance of the display panel, while optimizing the display effect of the display panel, the thinness of the display panel also needs to be considered to realize its portability.

[0052] In at least one embodiment, the side of the pixel defining layer away from the substrate is provided with at least one groove, and the photoelectric generation unit is located in the groove. By arranging the photoelectric generation unit in the groove corresponding to the periphery of the opening defined by the pixel defining layer, the photoelectric generation unit can not only utilize the natural light incident into the display panel for power generation, but also more efficiently utilize the light emitted by the light emitting device in the opening, which is incident on the photoelectric generation unit through the pixel defining layer, which greatly improves the power generation efficiency of the photoelectric generation unit. In addition, by arranging the photoelectric generation unit in the groove, the influence of the newly added film layer structure in the display panel on the thickness of the display panel is also reduced, thereby facilitating the realization of the thinness of the display panel, and the groove structure also protects the film layer between the pixel defining layer and the substrate of the display panel, reducing the risk of the performance of these film layers being affected by the preparation process of the photoelectric generation structure.

[0053] Exemplarily, as shown in Figure 2 , the pixel defining layer 300 between the corresponding two openings 310 in the display panel where the light emitting device 200 is arranged is provided with a groove 320, and the second electrode 210, the photoelectric generation unit 410 and the third electrode 420 are sequentially stacked in the groove 320 in the direction away from the substrate 100. In addition, the photoelectric generation structure 400 in the groove 320 is not limited to Figure 2 , it can also be a structure in which the third electrode 420 corresponding to the photoelectric generation unit 410 covers the orthographic projection of the photoelectric generation unit 410 on the substrate 100.

[0054] In combination with the preparation process of the display panel, the structure of the display panel can be further designed. In another embodiment, the pixel defining layer is defined with at least one through groove at the periphery of the opening, and the photoelectric generation structure is located in the through groove. Exemplarily, as shown in Figure 3 , in the process of forming the opening 310, the pixel defining layer 300 also defines a through groove 330 at the periphery of the opening 310, and the photoelectric generation structure 400 is arranged in the through groove 330. The newly added through groove 330 structure can be prepared in the same process as the opening 310 structure, saving the production process. In addition, by arranging the photoelectric generation structure 400 in the through groove 330, a photoelectric generation unit 410 with a relatively large surface area can be arranged, improving its power generation efficiency.

[0055] It should be understood that the shape and depth of the above-mentioned grooves and through-slots are not limited to the above-mentioned example scheme in which the cross section is rectangular, and the pattern of the cross section can also be other shapes such as a sector, a semicircle, a triangle, or other curves such as a wave pattern. In addition, regarding the parameters of the grooves and through-slots, such as the depth, width, and the like, and the height of the photovoltaic unit relative to the groove or through-slot provided in the groove or through-slot, these parameters can be designed according to the needs of the display panel, and all of the grooves or through-slots around the light-emitting devices can be the same, or the grooves or through-slots around the light-emitting devices of the same type can be the same, and similarly, the height of the photovoltaic unit relative to the groove can also be selected according to the actual situation, and will not be described here. The purpose of providing the photovoltaic structure connected to the second electrode, i.e., the cathode, in the display panel is to improve the problem of non-uniform brightness in the display area of the display panel, but considering the working principle of the display panel, the film layer structure is added to the display panel, and the influence of the film layer structure on the light-emitting efficiency and light-emitting effect of the display panel needs to be considered so as not to affect the normal operation of the display panel, and therefore, the photovoltaic structure needs to be further designed.

[0056] In some embodiments, the photovoltaic structure further comprises a third electrode, the third electrode is located on a side of the photovoltaic unit away from the substrate and connected to the photovoltaic unit. For example, as shown in Figure 1 , Figure 2 and Figure 3 , the photovoltaic structure 400 further comprises a third electrode 420 located on a side of the photovoltaic unit 410 away from the substrate 100, and the third electrode 420 is in direct contact with at least part of the surface of the photovoltaic unit 410 not in contact with the pixel defining layer 300 on the side of the substrate, thereby realizing the connection between the third electrode 410 and the photovoltaic unit 410.

[0057] Based on the specific structure of the photovoltaic structure, the film layers included therein, such as the third electrode, can be further designed to improve the power generation efficiency or the electric transmission efficiency of the photovoltaic structure. In some embodiments, the orthographic projection of the second electrode on the substrate coincides with the orthographic projection of the plurality of openings and the pixel defining layer on the substrate. The photovoltaic unit is located on a side of the second electrode away from the pixel defining layer and between the second electrode and the third electrode. The photovoltaic unit is located between the third electrode and the second electrode, which facilitates the transmission of the electricity converted by the photovoltaic unit from light to the second electrode, thereby further effectively improving the problem of non-uniform brightness of the display panel.

[0058] For example, as shown in Figure 1 and Figure 3As shown, in the display panel, the second electrode 210 is a common film layer of the plurality of light emitting devices 200, i.e. the second electrodes 210 of different light emitting devices 200 are connected together, the photoelectric generation unit 410 contacts the part of the second electrode 210 on the pixel defining layer 300 around the corresponding light emitting device 200 on the surface of the substrate 100, and the photoelectric generation unit 410 contacts the third electrode 420 away from the surface of the substrate 100.

[0059] In some embodiments, the third electrode covers the photoelectric generation unit in the photoelectric generation structure. In some embodiments, the third electrode covers the photoelectric generation unit in the photoelectric generation structure and the second electrode. In some embodiments, the third electrode covers the photoelectric generation unit in the photoelectric generation structure and the second electrode and the pixel defining layer. In some embodiments, the third electrode covers the photoelectric generation unit in the photoelectric generation structure and the second electrode and the pixel defining layer and the opening. Figure 4 As shown, the third electrode 420 in the photoelectric generation structure 400 covers the side surface of the photoelectric generation unit 410 and the surface away from the surface of the substrate 100, i.e. except for the surface of the photoelectric generation unit 410 contacting the second electrode, the other surfaces of the photoelectric generation unit 410 are covered by the third electrode 420.

[0060] In some embodiments, the third electrode covers the photoelectric generation unit in the photoelectric generation structure. In some embodiments, the third electrode covers the photoelectric generation unit in the photoelectric generation structure and the second electrode. In some embodiments, the third electrode covers the photoelectric generation unit in the photoelectric generation structure and the second electrode and the pixel defining layer. In some embodiments, the third electrode covers the photoelectric generation unit in the photoelectric generation structure and the second electrode and the pixel defining layer and the opening.

[0061] As shown, in the display panel, the second electrode 210 is a common film layer of the plurality of light emitting devices 200, i.e. the second electrodes 210 of different light emitting devices 200 are connected together, the photoelectric generation unit 410 contacts the part of the second electrode 210 on the pixel defining layer 300 around the corresponding light emitting device 200 on the surface of the substrate 100, and the photoelectric generation unit 410 contacts the third electrode 420 away from the surface of the substrate 100. Figure 5 As shown, in the display panel, the second electrode 210 is a common film layer of the plurality of light emitting devices 200, i.e. the second electrodes 210 of different light emitting devices 200 are connected together, the photoelectric generation unit 410 contacts the part of the second electrode 210 on the pixel defining layer 300 around the corresponding light emitting device 200 on the surface of the substrate 100, and the photoelectric generation unit 410 contacts the third electrode 420 away from the surface of the substrate 100.

[0062] In addition to setting the size of the surface area of the third electrode, the relative relationship between the third electrode and the second electrode is also designed. In some embodiments, the third electrode is connected to the second electrode. The third electrode directly contacts the second electrode without other film layers in between, which reduces the electrical loss in the process of electrical transmission and also shortens the electrical transmission channel between the two, so that the electricity generated by the photoelectric generation unit can be more effectively transmitted to the second electrode. As shown, Figure 4 and Figure 5As shown in the display panel, a part of the third electrode 420 in the photoelectric generation structure 400 arranged on the pixel defining layer 300 contacts the surface of the photoelectric generation unit 410 towards the surface of the substrate 100, and another part directly contacts the second electrode 210 away from the surface of the substrate 100.

[0063] It should be understood that the connection mode of the second electrode and the third electrode is not limited to the direct contact mode as shown in Figure 4 and Figure 5 The connection of the two can also be realized through a via hole or a wire, which can be designed according to the specific film layer structure of the display panel, and will not be described here.

[0064] In addition, the photoelectric generation structure is further designed in the embodiments of the present application to reduce the influence of the photoelectric generation structure on the second electrode of the display panel.

[0065] In some embodiments, the display panel further comprises a fourth electrode located on the side of the photoelectric generation unit facing the substrate, and the orthographic projection of the fourth electrode on the substrate coincides with the orthographic projection of the photoelectric generation unit on the substrate. The fourth electrode is located between the photoelectric generation unit and the second electrode, so that the preparation process of the photoelectric generation unit does not affect the second electrode, and the second electrode is protected, thereby improving the problem of brightness non-uniformity of the display panel and prolonging the service life of the display panel.

[0066] For example, as shown in Figure 2 and Figure 6 The photoelectric generation structure 400 arranged in the display panel comprises a fourth electrode 430, a photoelectric generation unit 410 and a third electrode 420 stacked in sequence away from the substrate 100, and the surface area of the fourth electrode 430 in the extension direction of the second electrode 210 is equal to the surface area of the photoelectric generation unit 410 in the extension direction of the second electrode 210, that is, the orthographic projection of the fourth electrode 430 and the photoelectric generation unit 410 on the second electrode 210 overlaps.

[0067] In other embodiments, the display panel further comprises a fourth electrode located between the photoelectric generation unit and the second electrode, and the orthographic projection of the fourth electrode on the substrate coincides with the orthographic projection of the second electrode on the substrate, and the fourth electrode is a transparent electrode. The fourth electrode directly contacts the second electrode and fully covers the second electrode, thereby protecting the second electrode and reducing the preparation difficulty of the fourth electrode and saving production cost.

[0068] For example, as shown in Figure 7As shown, the second electrodes 210 of each light emitting device 200 are connected to each other in the display panel, i.e., the second electrodes 210 in the display panel are a common film layer. The photoelectric generation structure 400 disposed on the pixel defining layer 300 includes a fourth electrode 430, a photoelectric generation unit 410, and a third electrode 420 stacked in sequence in a direction away from the substrate 100, and the fourth electrode 430 completely covers the second electrode, i.e., the fourth electrode 430 covers not only the orthographic projection of the plurality of openings 310 on the substrate 100 but also the orthographic projection of the pixel defining layer 300 on the substrate 100.

[0069] The photoelectric generation structure can be designed according to the brightness uniformity of the display panel. In some embodiments, the display panel includes a display area, and the photoelectric generation structure is disposed in the entire display area.

[0070] In addition, based on the design that the photoelectric generation structure is distributed in the entire display area, the photoelectric generation structure can be further designed. In some embodiments, the photoelectric generation structure includes one photoelectric generation unit, and the photoelectric generation unit is grid-shaped. The scheme of disposing the photoelectric generation structure as one grid-shaped photoelectric generation unit is applicable to the case of disposing the photoelectric generation structure in all or part of the display area of the display panel, which simplifies the manufacturing steps of the photoelectric generation structure and saves production costs.

[0071] Exemplarily, as shown in FIG. 1, the photoelectric generation structure 400 includes one photoelectric generation unit 410, and the photoelectric generation unit 410 is grid-shaped. Figure 8As shown, the display panel has a plurality of light emitting devices 200 arranged in a plurality of openings 310 defined by a pixel defining layer 300 of the display panel, and the plurality of light emitting devices 200 are divided into three types, i.e. a red light emitting device R, a green light emitting device G and a blue light emitting device B. The photoelectric generating structure 400 arranged on the pixel defining layer 300 includes a grid-shaped photoelectric generating unit 410 which is an integrated structure formed by a plurality of grids 440, each of which corresponds to form a mesh 441, and the surface area of the mesh 441 is greater than the surface area of the corresponding opening 310, and the orthographic projection of the mesh 441 on the substrate 100 covers the orthographic projection of the light emitting device 200 on the substrate 100 defined by the corresponding opening 310, i.e. the periphery of each of the light emitting device R, the light emitting device G and the light emitting device B is provided with the grid 440 contained in the photoelectric generating unit 410. In other embodiments, the display panel includes a display area, the display area includes a first sub-display area and a second sub-display area, the first sub-display area is arranged around the second sub-display area, and the photoelectric generating structure is arranged in the second sub-display area. Based on the driving mode of the display panel, considering the attenuation law of the driving signal, in general, the brightness of the part of the display area far from the edge of the display panel, i.e. the second sub-display area, is smaller than the brightness of the part of the display area close to the edge of the display panel, i.e. the first sub-display area, therefore, arranging the photoelectric generating structure in the second sub-display area performs pressure boosting processing on the second electrode of the light emitting device in the second sub-display area, improves the brightness of the second sub-display area, thereby reducing the brightness difference between the second sub-display area and the first sub-display area, and improving the problem of brightness non-uniformity of the display panel. In at least one embodiment, the second sub-display area is a middle region.

[0072] Exemplarily, as shown in FIG. 5, Figure 9 As shown, the display area 500 of the display panel includes a second sub-display area 520 located in the middle of the entire display panel and a first sub-display area 510 arranged around the second sub-display area 520. The photoelectric generating unit 410 included in the photoelectric generating structure 400 in the second display area 520 is a grid integrated structure, which makes the periphery of the plurality of light emitting devices in the second display area 520 be provided with the photoelectric generating structure 400.

[0073] It should be understood that the distribution scheme of the first sub-display area and the second sub-display area in the display panel is not limited to the scheme in the above examples, and the arrangement mode of the light emitting devices and the type and number of the light emitting devices in the second sub-display area located in the middle region can also be arranged to only include the light emitting device B and the light emitting device R, and can also be other types, such as including a plurality of light emitting device B, light emitting device R and light emitting device G. These can be designed according to the actual needs of the display panel, and will not be described here.

[0074] Unlike the aforementioned schemes that integrate the photoluminescent units into a single structure within part or all of the display area, in other embodiments, the photoluminescent structure comprises multiple photoluminescent units. These multiple light-emitting devices are categorized into those emitting light of various wavelengths, with photoluminescent units positioned around at least some of the light-emitting devices emitting the shortest wavelength light. In at least one embodiment, the photoluminescent units are in a closed ring. Each photoluminescent unit in the structure is an independent structure, allowing for more flexible placement. Furthermore, the light-emitting devices emitting the shortest wavelength light require a higher driving voltage from the second electrode. Therefore, placing photoluminescent units around some or all of the high-driving-voltage light-emitting devices allows for more efficient voltage boosting of the second electrode area corresponding to these devices, thereby more effectively improving the problem of uneven brightness in the display panel.

[0075] For example, such as Figure 10 As shown, the display panel includes an array of light-emitting devices 200, divided into three light-emitting units: a first light-emitting unit 240a, a second light-emitting unit 240b, and a third light-emitting unit 240c. Each light-emitting unit includes a light-emitting device R, a light-emitting device G, and a light-emitting device B. Furthermore, each light-emitting unit has a photoluminescence unit 410 surrounding its light-emitting device B, and the photoluminescence units 410 of different light-emitting devices are independent of each other. Specifically, in the first light-emitting unit 240a, the first photoluminescence unit 410a is positioned around the light-emitting device B. In the second light-emitting unit 240a, the second photoluminescence unit 410b is positioned around the light-emitting device B. In the third light-emitting unit 240c, the third photoluminescence unit 410c is positioned around the light-emitting device B. The first photoelectric generation unit 410a, the second photoelectric generation unit 410b, and the third photoelectric generation unit 410c are independently configured, and the orthographic projection of the first photoelectric generation unit 410a and the second photoelectric generation unit 410b onto the pixel defining layer 300 is a closed loop, while the orthographic projection of the third photoelectric generation unit 410c onto the pixel defining layer 300 is a U-shape.

[0076] It should be understood that the above is only an example of a scheme in which multiple photoelectric units are set up relatively independently. The specific design of the photoelectric units in the display panel is not limited to this scheme. It also includes other technical solutions. For example, the light-emitting devices corresponding to the photoelectric units in each light-emitting unit may be the same or multiple. The structure of the photoelectric units corresponding to different or the same type of light-emitting devices, as well as the parameters such as the size and shape of the photoelectric units (e.g., linear, wavy, curved, circular, triangular, and other polygonal shapes), can be the same or different. These can be designed according to the specific requirements of the display panel, and will not be elaborated here.

[0077] Considering the various factors affecting the uniformity of current distribution, the loss of the driving signal during transmission is also significant. In some embodiments, the display panel includes a display area and a non-display area. The display panel also includes at least one driving chip disposed in the non-display area, which is configured to provide a driving signal to a light-emitting device. Photoelectric structures are disposed in the display area, with a lower density of photoelectric structures in the display area closer to the driving chip than in the display area farther from the driving chip. As the distance from the driving chip increases, signal loss increases due to impedance along the signal transmission path. Therefore, changing the density of the photoelectric structures according to the distance from the driving chip can effectively improve the uniformity of current distribution, thereby effectively improving the problem of display non-uniformity.

[0078] For example, such as Figure 11 As shown, the display panel includes a display area 500 and a non-display area 600 surrounding the display area 500. A driver chip 700 for driving light-emitting devices R, B, and G is provided within the non-display area 600. Specifically, the driver chip 700 is positioned relative to the left edge of the display panel. The row of light-emitting devices R closest to the driver chip 700 has no photoelectric generator units 410 around it. As the distance from the driver chip 700 increases, more photoelectric generator units 410 are gradually added, resulting in the row of light-emitting devices B furthest from the driver chip 700 having the most photoelectric generator units 410 around it compared to other rows. In other words, as the distance from the driver chip 700 increases, the density of the photoelectric generator units 410 around the light-emitting devices increases.

[0079] It should be understood that the driver chip setting scheme is not limited to the scheme in the above example. Multiple or other positions of the driver chip can be set according to the needs of the display panel. For example, the driver chip can be set on the bottom bezel of the display panel, or two driver chips can be set and placed on the left and right bezels of the display panel respectively. This will not be elaborated here.

[0080] In at least one embodiment, the material of the photoelectric generation unit includes an organic solar cell material. In at least one embodiment, the organic solar cell material includes any one of PM6:BTP-BO-4CL, PCBM, or perovskite solar cell materials. The organic solar cell material can be printed on the pixel defining layer using an inkjet printing process to form the photoelectric generation unit.

[0081] This application also provides a display device, which includes a display panel according to any of the first aspects described above.

[0082] In at least one embodiment, the display device further comprises a touch sensor, a touch chip and a flexible circuit board for realizing touch control. In order to realize thinning of the touch display device, the touch sensor is arranged in the encapsulation layer of the display device, the touch chip is arranged on the flexible circuit board, and the touch sensor is transmitted with signals through the touch signal line.

[0083] In at least one embodiment, the display panel can be any product or component with display and touch functions, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, etc. The implementation of the display panel can refer to the above-mentioned embodiments of the array substrate, and the repeated parts will not be described herein.

[0084] The above merely provides a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A display panel, characterized in that, include: Base; A pixel defining layer is disposed on the substrate and defines a plurality of openings, wherein a light-emitting device is disposed within the openings, and the light-emitting device includes a first electrode, a light-emitting functional layer and a second electrode sequentially stacked on the substrate; as well as A photoelectric structure, connected to the second electrode, includes at least one photoelectric unit, and the orthogonal projection of the photoelectric unit on the substrate falls outside the orthogonal projection of the first electrode on the substrate; The display panel includes a display area and a non-display area, and the display panel further includes: At least one driver chip is disposed in the non-display area and configured to provide a driving signal to the light-emitting device; The photoelectric structure is disposed in the display area, and the density of the photoelectric structure disposed in the display area near the driver chip is less than the density of the photoelectric structure disposed in the display area away from the driver chip.

2. The display panel according to claim 1, characterized in that, The pixel defining layer defines at least one through slot around the opening, and the photoelectric structure is located within the through slot; or The photoelectric structure is located on the side of the pixel defining layer opposite to the substrate.

3. The display panel according to claim 1, characterized in that, The pixel defining layer has at least one groove on the side opposite to the substrate, and the photoelectric structure is located within the groove.

4. The display panel according to claim 2, characterized in that, The photoelectric structure further includes a third electrode, which is located on the side of the photoelectric unit away from the substrate and is connected to the photoelectric unit.

5. The display panel according to claim 4, characterized in that, The orthographic projection of the second electrode on the substrate coincides with the orthographic projection of the plurality of openings and the pixel defining layer on the substrate, and the photoelectric unit is located on the side of the second electrode away from the substrate and between the second electrode and the third electrode.

6. The display panel according to claim 4, characterized in that, The orthographic projection of the third electrode on the substrate covers the orthographic projection of the photoelectric unit on the substrate; or the orthographic projection of the third electrode on the substrate covers the orthographic projections of the plurality of openings and the pixel defining layer on the substrate, and the third electrode is a transparent electrode.

7. The display panel according to claim 1, characterized in that, The photoelectric structure includes one photoelectric unit, and the photoelectric unit is in a grid-like shape; or The photoelectric structure includes multiple photoelectric units, and the multiple light-emitting devices are classified as light-emitting devices that emit multiple wavelengths of light respectively. The photoelectric units are arranged around at least some of the light-emitting devices that emit the shortest wavelength of light.

8. The display panel according to claim 7, characterized in that, The photoelectric unit is a closed ring and is arranged around the light-emitting device.

9. A display device, characterized in that, The display panel includes any one of claims 1-8.

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