Display panel and display device

Abstract

The invention belongs to the technical field of display, and particularly relates to a display panel and a display device.The display panel is provided with a photosensitive area and a light supplementing area, the light supplementing area is arranged around the photosensitive area, a light supplementing unit is arranged in the light supplementing area and comprises a first electrode, a second electrode and a light supplementing structure, and a driving electric field can be formed between the first electrode and the second electrode; external light can be emitted to the second electrode through the first electrode; the light supplementing structure is arranged between the first electrode and the second electrode, the light supplementing structure comprises a shell, dispersion liquid, light conversion particles and black particles, the dispersion liquid, the light conversion particles and the black particles are wrapped in the shell, and the light conversion particles and the black particles are charged, have opposite electrical properties and move towards different electrodes under the action of a driving electric field; when the light conversion particles move to the first electrode, the light conversion particles can convert external light into visible light and reflect the visible light to the outside so as to realize light supplement for the area where the photosensitive element is located. Light can be supplemented to an object shot by the photosensitive element by means of external light.

Description

Technical Field

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

[0002] At present, mobile phone photography is gradually replacing the role of cameras. With the development of electronic technology, the functions of mobile phone photography are becoming more and more comprehensive, and users' demand for photography is also getting higher and higher.

[0003] In the prior art, when taking photos with a mobile phone, a method of external light supplement is required, such as a light supplement board or a lighting method. However, the method of external light supplement is not very convenient for taking photos. Summary of the invention

[0004] The purpose of the present application is to provide a display panel and a display device that can solve the problem of needing fill light when taking pictures.

[0005] In a first aspect of the present application, a display panel is provided, which is provided with a photosensitive area corresponding to a photosensitive element, wherein the display panel further comprises a fill light area arranged around the photosensitive area, a fill light unit is arranged in the fill light area, and the fill light unit comprises:

[0006] A first electrode and a second electrode are arranged opposite to each other, a driving electric field can be formed between the first electrode and the second electrode, and external light can pass through the first electrode and be emitted to the second electrode;

[0007] A light-filling structure is provided between the first electrode and the second electrode, the light-filling structure comprises a shell, and a dispersion liquid, light-conversion particles and black particles wrapped in the shell, the light-conversion particles and the black particles are both charged and have opposite electrical properties;

[0008] Among them, the photoconversion particles and the black particles can move toward different electrodes respectively under the action of the driving electric field; when the photoconversion particles move to the first electrode, the photoconversion particles can convert the external light into visible light, and reflect the visible light to the outside world to achieve fill light for the area where the photosensitive element is located; when the black particles move to the first electrode, the black particles can absorb the external light and make the photosensitive element black.

[0009] In an exemplary embodiment of the present application, a plurality of fill light units are provided in the fill light area, and adjacent fill light units are spaced apart from each other.

[0010] In an exemplary embodiment of the present application, the display panel further includes a driving backplane and a display area, the second electrode is electrically connected to the driving backplane, the display area is arranged around the fill light area, and a plurality of array-arranged pixel units are provided in the display area;

[0011] The projection area of ​​the fill light unit on the driving backplane is an integer multiple of the projection area of ​​the pixel unit on the driving backplane.

[0012] In an exemplary embodiment of the present application, a projection area of ​​the fill light unit on the driving backplane is the same as a projection area of ​​the pixel unit on the driving backplane, and an arrangement between the fill light unit and the pixel unit is the same as an arrangement of the pixel units in the display area.

[0013] In an exemplary embodiment of the present application, each of the pixel units includes a plurality of sub-pixels, and adjacent sub-pixels are arranged at intervals from each other;

[0014] Each of the sub-pixels includes an anode, a cathode, and an organic light-emitting portion disposed between the anode and the cathode. The anodes of adjacent sub-pixels are spaced apart from each other, and the organic light-emitting portions of adjacent sub-pixels are spaced apart from each other.

[0015] In an exemplary embodiment of the present application, the first electrode is the cathode;

[0016] The second electrode and the anode are arranged in the same layer, and the second electrode and the anode are arranged spaced apart from each other.

[0017] In an exemplary embodiment of the present application, the photoconversion particles include gelatin and deoxyribonucleic acid.

[0018] In an exemplary embodiment of the present application, the display panel further includes an encapsulation layer, and the encapsulation layer is disposed on a side of the cathode away from the driving backplane.

[0019] In an exemplary embodiment of the present application, the display panel further comprises a color resist layer, and the color resist layer is arranged on a side of the encapsulation layer away from the driving backplane;

[0020] The color resist layer includes a plurality of color resists arranged in an array, and the color resists correspond to the sub-pixels one by one.

[0021] A second aspect of the present application provides a display device, including:

[0022] Photosensitive element; and

[0023] In the display panel described in any of the above items, the photosensitive element corresponds to the photosensitive area, and the fill light unit is arranged around the photosensitive element.

[0024] The display panel and display device of the present application have at least the following beneficial effects:

[0025] A fill-in light area with a fill-in light unit is provided on the periphery of the photosensitive area. By controlling the electrical properties of the first electrode and the second electrode in the fill-in light unit, the moving direction of the light conversion particles and the black particles in the fill-in light structure can be controlled; when the light conversion particles move to one side of the first electrode, the light conversion particles can convert external light into visible light, and reflect the visible light to the outside world, so that the visible light is irradiated on the photographed object, so as to fill in the light of the object photographed by the photosensitive element. That is, this solution can fill in the light of the object photographed by the photosensitive element with the help of external light, which can reduce the use of fill-in light equipment, making it more convenient to fill in the light of mobile phone photography, and the fill-in light effect can be achieved without fill-in light equipment, effectively improving the photographing effect and reducing the use cost of fill-in light equipment.

[0026] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by the practice of the present application.

[0027] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A schematic structural diagram is shown in which a photosensitive area and a fill light area are provided on the display panel provided in the first or second embodiment of the present application.

[0030] Figure 2 A schematic cross-sectional structure diagram of a display panel provided in Embodiment 1 or Embodiment 2 of the present application is shown.

[0031] Figure 3 A structural schematic diagram showing a microcapsule structure used in the fill light structure provided in Embodiment 1 or Embodiment 2 of the present application.

[0032] Figure 4 A structural schematic diagram showing that the fill light structure provided in the first or second embodiment of the present application adopts a micro-cup structure.

[0033] Figure 5A schematic diagram of the structure in which the light conversion particles in the microcapsule structure provided in Example 1 or Example 2 of the present application convert external light into visible light and reflect the visible light is shown.

[0034] Figure 6 A schematic diagram of the structure in which the light conversion particles in the microcup structure provided in Example 1 or Example 2 of the present application convert external light into visible light and reflect the visible light is shown.

[0035] Figure 7 A structural schematic diagram showing a microcapsule structure provided in Embodiment 1 or Embodiment 2 of the present application in which part of the light-filling structure is in a black state and the other part is in a light-filling state.

[0036] Figure 8 A structural schematic diagram showing a microcup structure provided in Embodiment 1 or Embodiment 2 of the present application in which part of the fill light structure is in a black state and the other part is in a fill light state.

[0037] Fig. 9 A schematic diagram of the structure of the display area surrounding the fill light area provided in the first or second embodiment of the present application is shown.

[0038] Fig.10 A schematic diagram of the structure of a pixel unit in which a display area adopts a diamond structure provided in Embodiment 1 or Embodiment 2 of the present application is shown.

[0039] Description of reference numerals:

[0040] 100, display panel; 100a, photosensitive area; 100b, fill light area; 100c, display area; 110, fill light unit; 111, first electrode; 112, second electrode; 113, fill light structure; 1130, shell; 1131, light conversion particles; 1132, black particles; 120, driving backplane; 130, pixel unit; 131, sub-pixel; 131a, red sub-pixel; 131b, green sub-pixel; 131c, blue sub-pixel; 1310, anode; 1311, cathode; 1312, organic light-emitting part; 140, encapsulation layer; 150, color resist layer; 151a, red color resist; 151b, green color resist; 151c, blue color resist; 200, photosensitive element. DETAILED DESCRIPTION

[0041] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0042] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0043] In this application, unless otherwise clearly specified and limited, the terms "assembly", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0045] Embodiment 1

[0046] See also Figure 1 As shown, the embodiment of the present application provides a display panel 100, on which a photosensitive area 100a corresponding to a photosensitive element 200 is provided, and the photosensitive element 200 can realize a photographing function. The display panel 100 also includes a fill light area 100b arranged around the photosensitive area 100a, and the fill light area 100b can fill light for an object to be photographed when the photosensitive element 200 is taking a photo, thereby improving the photographing effect, reducing the use of external fill light equipment, and reducing costs.

[0047] It should be noted that the photosensitive element 200 can be a front camera or a rear camera. When the photosensitive element 200 is a front camera, the photosensitive element 200 is an under-screen camera.

[0048] In addition, the width of the fill light area 100b is 5 mm to 10 mm, for example, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm. The fill light area 100b adopts a width of 5 mm to 10 mm, which can not only fill light for the object to be photographed, but also reduce the space occupied by the fill light area 100b, that is, it can ensure space optimization while being able to fill light.

[0049] When the photosensitive element 200 is a front camera, the area of ​​the display region 100 c occupied by the photosensitive element 200 can be reduced, thereby ensuring the aperture ratio of the display panel 100 and the display image of the display panel 100 .

[0050] It is worth mentioning that the fill light area 100b is arranged around the outer side of the photosensitive area 100a. The cross section of the fill light area 100b can be circular, square, or other shapes.

[0051] In some embodiments of the present application, see Figure 1 As shown, the cross section of the fill light area 100 b is annular, and a fill light unit 110 is provided in the fill light area 100 b , and the fill light unit 110 is used to fill light the object to be photographed, thereby improving the photographing effect of the photosensitive element 200 .

[0052] See also Figures 2 to 8 As shown, the fill light unit 110 may be an electronic ink structure, which includes a first electrode 111 , a second electrode 112 and a fill light structure 113 .

[0053] In some embodiments of the present application, the first electrode 111 and the second electrode 112 are arranged opposite to each other, and the first electrode 111 and the second electrode 112 can be connected to different driving signals so that the first electrode 111 and the second electrode 112 have different electrical properties, thereby forming a driving electric field between the first electrode 111 and the second electrode 112.

[0054] It should be noted that external light can pass through the first electrode 111 and be emitted to the second electrode 112, that is, the first electrode 111 is located closer to the outside world, and the first electrode 111 is a transparent electrode, so that external light can pass through the first electrode 111 and be emitted into the second electrode 112. The second electrode 112 can be a transparent electrode or an opaque electrode, which is not specifically limited here.

[0055] In some embodiments of the present application, see Figure 3 and Figure 4 As shown, the light-filling structure 113 is disposed between the first electrode 111 and the second electrode 112. The light-filling structure 113 may be a microcapsule structure or a microcup structure, and may be specifically designed according to different embodiments.

[0056] In some embodiments of the present application, see Figure 3As shown, the fill light structure 113 includes a shell 1130 and a dispersion liquid, light conversion particles 1131 and black particles 1132 wrapped in the shell 1130. The cross section of the shell 1130 can be circular, square or trapezoidal. The light conversion particles 1131 and the black particles 1132 are mixed in the dispersion liquid, and the light conversion particles 1131 and the black particles 1132 are both charged, and the electrical properties of the light conversion particles 1131 and the black particles 1132 are opposite.

[0057] In some embodiments of the present application, the photoconversion particle 1131 is a photoconversion silica gel ball, and the photoconversion particle 1131 includes a polymer and a biomass aerogel ball prepared from gelatin (GE) and deoxyribonucleic acid (DNA), and the polymer is coated or modified by the biomass aerogel ball.

[0058] It is worth mentioning that modification and coating can be carried out by physical or chemical methods. Physical methods include grinding and spraying. Chemical methods include coagulation, emulsion polymerization or dispersion polymerization, among which the polymer uses styrene (St) as a monomer and then introduces other different substances for polymerization.

[0059] In addition, the photoconversion particles 1131 can be charged by coating or modifying the biomass aerogel balls with polymers, and the charge can be applied to the outside of the polymer during surface modification.

[0060] It is understandable that, since both the light-converted particles 1131 and the black particles 1132 are charged, the light-converted particles 1131 and the black particles 1132 can move in the housing 1130 under the action of the driving electric field formed by the first electrode 111 and the second electrode 112. And since the light-converted particles 1131 and the black particles 1132 have opposite electrical properties, the light-converted particles 1131 and the black particles 1132 move in opposite directions, and move toward different electrodes respectively.

[0061] For example, see Figure 5 and Figure 6As shown, the photoconversion particles 1131 are negatively charged, the black particles 1132 are positively charged, the first electrode 111 is positively charged, and the second electrode 112 is negatively charged. Under the principle of like repels like and opposites attract, the photoconversion particles 1131 can move toward the first electrode 111, and the black particles 1132 can move toward the second electrode 112, so that the photoconversion particles 1131 are attached to the first electrode 111, and the black particles 1132 are attached to the second electrode 112, and the photoconversion particles 1131 are closer to the outside world than the black particles 1132. At this time, when external light enters from the first electrode 111, the photoconversion particles 1131 can convert the external light into visible light, and can reflect the visible light back, that is, the visible light will be reflected to the outside world to fill in the light of the object to be photographed. In other words, when the photosensitive element 200 is taking a photo, the photoconversion particles 1131 can use the external light to fill in the light of the object to be photographed, improve the photographing effect, and reduce the use of fill-in light equipment, improve the convenience of taking photos, and reduce costs.

[0062] It should be noted that the light conversion particles 1131 use external light to provide fill light for the object to be photographed. Therefore, when the external light is stronger, the fill light intensity is greater, and the shooting effect of the photosensitive element 200 is better.

[0063] For another example, see Figure 3 and Figure 4 As shown, the light conversion particles 1131 are negatively charged, the black particles 1132 are positively charged, the first electrode 111 is negatively charged, and the second electrode 112 is positively charged. Under the principle of like charges repel each other and opposite charges attract each other, the light conversion particles 1131 can move toward the second electrode 112, and the black particles 1132 can move toward the first electrode 111, so that the light conversion particles 1131 are attached to the second electrode 112, and the black particles 1132 are attached to the first electrode 111. At this time, when external light passes through the first electrode 111 and enters the fill light structure 113, the black particles 1132 absorb the external light, and the fill light structure 113 is in a black state, without a fill light function.

[0064] It is understandable that the fill light structure 113 can be selected to be in the fill light state or the black state according to the situation of the object to be photographed, and the required state can be automatically selected according to the user.

[0065] It is worth mentioning that the light conversion particles 1131 can also be positively charged, and the black particles 1132 can also be negatively charged. The electrical properties of the two can be designed according to different embodiments as long as the electrical properties of the two are different.

[0066] In addition, the black particles 1132 may be a black matrix (BM).

[0067] In some embodiments of the present application, the light conversion particles 1131 and the black particles 1132 are both nanometer-sized and are spherical in structure to ensure the light conversion effect and the shielding effect.

[0068] In some embodiments of the present application, see Fig. 9 and Fig.10 As shown, a plurality of fill light units 110 are provided in the fill light area 100b, and adjacent fill light units 110 are arranged at intervals. The use of a plurality of fill light units 110 can convert external light into more visible light, and reflect the visible light to the outside world to fill light the object to be photographed, further improving the fill light effect, and thus improving the photographing effect.

[0069] In some other embodiments of the present application, a ring-shaped fill light unit 110 is provided in the fill light area 100b. The first electrode 111 and the second electrode 112 in the fill light unit 110 are both ring structures, and the moving directions of the light conversion particles 1131 and the black particles 1132 are controlled by controlling the electrical properties of the first electrode 111 and the second electrode 112, thereby realizing a black state or a fill light state.

[0070] It is understandable that when there is only one fill light unit 110 in the fill light area 100b, the fill light unit 110 can be designed into different shapes according to the design shape of the fill light area 100b. For example, the cross-section of the fill light area 100b is square, the cross-section of the fill light unit 110 is square, and the fill light unit 110 is arranged around the photosensitive area 100a.

[0071] It is worth mentioning that when the fill light area 100b is provided with a plurality of fill light units 110, the first electrodes 111 and the second electrodes 112 between the plurality of fill light units 110 may be connected to each other or spaced apart from each other, that is, the same first electrode 111 and the second electrode 112 may be shared, or each fill light unit 110 may be independently designed with a first electrode 111 and a second electrode 112.

[0072] It is understandable that when a plurality of fill light units 110 use the same first electrode 111 and second electrode 112 , it is possible to simultaneously control the plurality of fill light units 110 , thereby reducing the input of driving signals and reducing costs.

[0073] In addition, when each fill light unit 110 uses a separate first electrode 111 and a second electrode 112, it can perform selective fill light according to required conditions and perform intelligent fill light, thereby further improving the photographic effect.

[0074] That is, see Figure 7 and Figure 8As shown, multiple fill light units 110 can be combined with a pattern algorithm to control the electrical properties of the first electrode 111 and the second electrode 112, thereby controlling a portion of the fill light units 110 to be in a fill light state and another portion to be in a black state. According to the situation of the object to be photographed, the required fill light conditions are intelligently selected to further improve the photographic effect.

[0075] In some embodiments of the present application, see Figure 2 As shown, the display panel 100 also includes a driving backplane 120, which may include a substrate and circuit structures such as thin film transistors and wiring arranged on the substrate to drive the organic light-emitting portion 1312 mentioned later to emit light, which will not be described in detail here.

[0076] It is worth mentioning that the driving backplane 120 is electrically connected to the second electrode 112 in the above-mentioned fill light unit 110, which can change the electrical properties of the second electrode 112 to change the direction of the driving electric field, thereby controlling the movement direction of the black particles 1132 and the light conversion particles 1131 in the fill light structure 113.

[0077] In some embodiments of the present application, see Figure 1 , Fig. 9 and Fig.10 As shown, the display panel 100 further includes a display area 100c, which is used to present a display image. The display area 100c can be arranged around the fill light area 100b, and a plurality of pixel units 130 arranged in an array are arranged in the display area 100c, each pixel unit 130 is arranged at intervals, and each pixel unit 130 can include a plurality of sub-pixels 131.

[0078] For example, see Fig. 9 and Fig.10 As shown, each pixel unit 130 includes a red sub-pixel 131a, a green sub-pixel 131b and a blue sub-pixel 131c. The red sub-pixel 131a can emit red light, the green sub-pixel 131b can emit green light, and the blue sub-pixel 131c can emit blue light.

[0079] In some embodiments of the present application, the projection area of ​​the fill light unit 110 on the driving backplane 120 may be an integer multiple of the projection area of ​​the pixel unit 130 on the driving backplane 120 .

[0080] For example, the projection area of ​​the fill light unit 110 on the driving backplane 120 is 1 times the projection area of ​​the pixel unit 130 on the driving backplane 120, that is, the size of the fill light unit 110 is the same as the size of the pixel unit 130, so as to ensure that more fill light units 110 are arranged in the fill light area 100b.

[0081] In another example, the projection area of ​​the fill light unit 110 on the driving backplane 120 is twice the projection area of ​​the pixel unit 130 on the driving backplane 120, that is, the size of the fill light unit 110 is larger than the size of the pixel unit 130. In the fill light area 100b of the same size, the number of fill light units 110 arranged is less than the number of fill light units 110 of the same size as the pixel unit 130.

[0082] It can be understood that when the fill light unit 110 is smaller, the fill light effect of the fill light area 100b is more precise, the fill light effect on the photographed object is better, and the photographing effect is improved.

[0083] In some embodiments of the present application, the projection area of ​​the fill light unit 110 on the driving backplane 120 is the same as the projection area of ​​the pixel unit 130 on the driving backplane 120. And the arrangement between the fill light unit 110 and the pixel unit 130 is the same as the arrangement of the pixel unit 130 in the display area 100c, so that the arrangement in the fill light area 100b is the same as the arrangement in the display area 100c, so that the position of the fill light unit 110 in the fill light area 100b can be reasonably arranged, and the fill light unit 110 is prevented from occupying too much position in the display area 100c, so as to ensure the aperture ratio in the display area 100c, and further ensure the display effect.

[0084] For example, see Fig. 9 As shown, the shape of the pixel unit 130 in the display area 100c is a long strip, that is, the sub-pixels 131 are arranged in sequence in the row direction. Correspondingly, the fill light unit 110 is also a long strip structure, and the arrangement between the fill light unit 110 and the pixel unit 130 is the same as the arrangement of the pixel unit 130 in the display area 100c.

[0085] For another example, see Fig.10 As shown, the cross-section of the pixel unit 130 in the display area 100c is in a rhombus shape, and the cross-section of the sub-pixel 131 is also in a rhombus shape. The pixel unit 130 includes a red sub-pixel 131a, a blue sub-pixel 131c, and two green sub-pixels 131b. The size of the red sub-pixel 131a is the same as that of the blue sub-pixel 131c, and the red sub-pixel 131a and the blue sub-pixel 131c are arranged in sequence in the column direction. The size of the two green sub-pixels 131b is the same, and the size of the green sub-pixel 131b is smaller than that of the red sub-pixel 131a and the blue sub-pixel 131c, and the two green sub-pixels 131b are arranged in sequence in the row direction. The cross-section of the fill light unit 110 adopts the same rhombus structure as the pixel unit 130, and the arrangement between the fill light unit 110 and the pixel unit 130 is the same as the arrangement between the pixel units 130 in the display area 100c.

[0086] In some embodiments of the present application, see Figure 2 As shown, the display panel 100 may be an organic light emitting diode (OLED) display panel 100 .

[0087] In some embodiments of the present application, see Figure 2 As shown, each sub-pixel 131 in the pixel unit 130 includes an anode 1310 , a cathode 1311 , and an organic light emitting portion 1312 disposed between the anode 1310 and the cathode 1311 .

[0088] It should be understood that the anodes 1310 between the sub-pixels 131 are spaced apart from each other, so that the sub-pixels 131 can be driven independently of each other, and the cathodes 1311 of the sub-pixels 131 can be connected to each other to form an entire surface electrode to reduce processing costs.

[0089] The anode 1310 may be made of indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO) or indium oxide (In2O3), etc. The anode 1310 is electrically connected to the thin film transistor on the driving backplane 120 to drive the organic light emitting unit 1312 to emit light.

[0090] In addition, the organic light-emitting portions 1312 between each sub-pixel 131 are separated by a pixel definition portion, and the organic light-emitting portion 1312 may include a hole injection layer, a hole transport layer, an organic light-emitting material layer, an electron transport layer and an electron injection layer stacked in sequence, the hole injection layer is in contact with the anode 1310, and the electron injection layer is in contact with the cathode 1311, but is not limited thereto. The organic light-emitting portion 1312 may also include only a hole transport layer, a light-emitting material layer and an electron transport layer, or other structures, depending on actual needs.

[0091] The cathode 1311 may be formed after the organic light emitting portion 1312 is formed, and is in contact with the organic light emitting portion 1312. The cathode 1311 may include a low work function material layer including Li, Ca, LiF / Ca, LiF / Al, Al, Mg, Ag, Pt, Pd, Ni, Au, Nd, Ir, Cr, BaF2, Ba, a compound thereof, or a mixture thereof. For example, the cathode 1311 may include a low work function material layer made of a mixture of Ag and Mg.

[0092] It should be understood that the red sub-pixel 131a, the green sub-pixel 131b, and the blue sub-pixel 131c correspond to different luminescent colors of the organic light-emitting portion 1312. For example, the red sub-pixel 131a refers to the luminescent color of the organic light-emitting portion 1312 being red, the green sub-pixel 131b refers to the luminescent color of the organic light-emitting portion 1312 being green, and the blue sub-pixel 131c refers to the luminescent color of the organic light-emitting portion 1312 being blue.

[0093] In some embodiments of the present application, see Figure 2 As shown, the first electrode 111 is a cathode 1311, and the second electrode 112 is disposed in the same layer as the anode 1310 of the sub-pixel 131 in the display area 100c, so as to save the manufacturing cost of the first electrode 111 and the second electrode 112 and reduce the production cost.

[0094] It should be understood that, in the present application, "same-layer arrangement" refers to the use of the same film-forming process to form a film layer for forming a specific pattern, and then using the same mask to form a layer structure through a single patterning process. That is, one patterning process corresponds to a mask (also called a photomask). Depending on the specific pattern, a single patterning process may include multiple exposure, development or etching processes, and the specific pattern in the formed layer structure may be continuous or discontinuous, and these specific patterns may also be at different heights or have different thicknesses, thereby simplifying the manufacturing process, saving manufacturing costs, and improving production efficiency.

[0095] In addition, when the anode 1310 and the second electrode 112 are disposed in the same layer, the anode 1310 and the second electrode 112 are disposed at an interval to avoid mutual interference between the anode 1310 and the second electrode 112 to affect the display or fill light effect.

[0096] In other embodiments of the present application, the first electrode 111 may also be arranged on the side of the cathode 1311 close to the driving backplane 120, that is, the first electrode 111 does not use the cathode 1311, and the electrode layer is deposited separately; the second electrode 112 may also be deposited separately, that is, the second electrode 112 is not arranged on the same layer as the anode 1310.

[0097] In some embodiments of the present application, see Figure 2 As shown, the display panel 100 further includes an encapsulation layer 140 , which is located on a side of the cathode 1311 away from the driving substrate, and can isolate external water and oxygen to avoid affecting the working state of the organic light-emitting portion 1312 and the compensation unit.

[0098] In some embodiments of the present application, see Figure 2As shown, the display panel 100 further includes a color resist layer 150. The color resist layer 150 is disposed on a side of the encapsulation layer 140 away from the driving backplane 120. The color resist layer 150 includes a color resist area and a hollow area, and the color resist area is disposed around the hollow area. A plurality of color resist units are disposed in the color resist area, and the color resist units include a plurality of color resists, and the color resists correspond to the sub-pixels 131 one by one, that is, the red color resist 151a corresponds to the red sub-pixel 131a, the green color resist 151b corresponds to the green sub-pixel 131b, and the blue color resist 151c corresponds to the blue sub-pixel 131c. By setting the color resists corresponding to the respective sub-pixels 131, other miscellaneous colors can be filtered out, so as to ensure that the emitted colors are more vivid, and improve the display effect of the display area 100c.

[0099] It can be understood that a black matrix BM is provided between adjacent color resists to prevent crosstalk between adjacent color resists and ensure display effect.

[0100] In some embodiments of the present application, the hollow area is used to leak out the fill light unit 110 and the photosensitive element 200, and the external light is injected into the fill light unit 110 through the hollow area. The orthographic projection of the hollow area on the driving back plate 120 covers the orthographic projection of the fill light unit 110 and the photosensitive element 200 on the driving back plate 120, so as to ensure that the visible light reflected by the fill light unit 110 can act on the object to be photographed in a larger range, improve the fill light effect, and then improve the photography effect.

[0101] Embodiment 2

[0102] See also Figure 2 As shown, the second embodiment provides a display device, which includes the display panel 100 mentioned in the first embodiment and the photosensitive element 200 corresponding to the photosensitive area 100a. The present embodiment adopts the fill light area 100b as in the first embodiment, which can effectively fill light for the object to be photographed, improve the shooting brightness of the photosensitive element 200, and thus improve the imaging effect of the photosensitive element 200. In addition, the fill light unit 110 in this solution can also effectively reduce the use of fill light equipment, improve the convenience of taking pictures, and reduce costs. This display device can be a mobile phone, a tablet, etc.

[0103] In the description of this specification, the description with reference to the terms "some embodiments", "exemplarily", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0104] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application. Therefore, any changes or modifications made in accordance with the claims and description of the present application should fall within the scope of the patent of this application.

Claims

1. A display panel having a photosensitive area corresponding to a photosensitive element, characterized in that: The display panel further includes a fill light area arranged around the photosensitive area, a fill light unit is arranged in the fill light area, and the fill light unit includes: A first electrode and a second electrode are arranged opposite to each other, a driving electric field can be formed between the first electrode and the second electrode, and external light can pass through the first electrode and be emitted to the second electrode; A light-filling structure is provided between the first electrode and the second electrode, the light-filling structure comprises a shell, and a dispersion liquid, light-conversion particles and black particles wrapped in the shell, the light-conversion particles and the black particles are both charged and have opposite electrical properties; Among them, the photoconversion particles and the black particles can move toward different electrodes respectively under the action of the driving electric field; when the photoconversion particles move to the first electrode, the photoconversion particles can convert the external light into visible light and reflect the visible light to the outside to achieve fill light for the area where the photosensitive element is located; when the black particles move to the first electrode, the black particles can absorb the external light and make the photosensitive element black.

2. The display panel according to claim 1, characterized in that: A plurality of fill light units are arranged in the fill light area, and adjacent fill light units are arranged at intervals.

3. The display panel according to claim 2, characterized in that: The display panel further includes a driving backplane and a display area, the second electrode is electrically connected to the driving backplane, the display area is arranged around the fill light area, and a plurality of pixel units arranged in an array are arranged in the display area; The projection area of ​​the fill light unit on the driving backplane is an integer multiple of the projection area of ​​the pixel unit on the driving backplane.

4. The display panel according to claim 3, characterized in that: The projection area of ​​the fill light unit on the driving backplane is the same as the projection area of ​​the pixel unit on the driving backplane, and the arrangement between the fill light unit and the pixel unit is the same as the arrangement of the pixel units in the display area.

5. The display panel according to claim 3, characterized in that: Each of the pixel units includes a plurality of sub-pixels, and adjacent sub-pixels are arranged at intervals; Each of the sub-pixels includes an anode, a cathode, and an organic light-emitting portion disposed between the anode and the cathode. The anodes of adjacent sub-pixels are spaced apart from each other, and the organic light-emitting portions of adjacent sub-pixels are spaced apart from each other.

6. The display panel according to claim 5, characterized in that: The first electrode is the cathode; The second electrode and the anode are arranged in the same layer, and the second electrode and the anode are arranged spaced apart from each other.

7. The display panel according to claim 1, characterized in that: The photoconvertible particles include gelatin and deoxyribonucleic acid.

8. The display panel according to claim 5, characterized in that: The display panel further comprises an encapsulation layer, and the encapsulation layer is arranged on a side of the cathode away from the driving backplane.

9. The display panel according to claim 8, characterized in that: The display panel further comprises a color resist layer, and the color resist layer is arranged on a side of the encapsulation layer away from the driving backplane; The color resist layer includes a plurality of color resists arranged in an array, and the color resists correspond to the sub-pixels one by one.

10. A display device, characterized in that: include: Photosensitive element; as well as In the display panel according to any one of claims 1 to 9, the photosensitive element corresponds to the photosensitive area, and the fill light unit is arranged around the photosensitive element.

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