Display module, manufacturing method thereof and display device

Abstract

The invention provides a display module, a manufacturing method thereof and a display device, relates to the technical field of display, and is used for prolonging the endurance time of a display product. The display module comprises a display panel, an energy recovery structure, a flexible circuit board and a power supply control module, the display panel comprises a display area and a peripheral area located on the periphery of the display area. The energy recovery structure is located on the light emitting side of the display panel, and the energy recovery structure is used for converting light energy of received light rays into electric energy; the flexible circuit board is arranged in a peripheral area of the display panel, the energy recovery structure is connected with a power supply control module through the flexible circuit board, and the power supply control module is used for providing electric energy converted by the energy recovery structure to a battery for supplying power to the display module.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display module and a manufacturing method thereof, and a display device. Background Art

[0002] With the continuous development of display technology, there are more and more types of display products, such as organic light-emitting diode (OLED) display products, which can achieve a more realistic picture quality experience and extremely high peak brightness, and can still maintain a clear display effect under strong outdoor light. However, in outdoor strong light scenes, the screen of OLED display products is usually in a high-brightness, high-power consumption mode, especially in outdoor wearables, communications and other situations where they are exposed to strong light for a long time. The battery life of display products is only 20%-30% of that in normal use scenarios. Therefore, how to improve the battery life of display products has become a technical problem that needs to be solved urgently. Summary of the invention

[0003] The object of the present invention is to provide a display module and a manufacturing method thereof, and a display device, so as to improve the battery life of a display product.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A first aspect of the present invention provides a display module, comprising: a display panel, an energy recovery structure, a flexible circuit board and a power control module;

[0006] The display panel includes a display area and a peripheral area located around the display area;

[0007] The energy recovery structure is located at the light-emitting side of the display panel, and is used to convert the light energy of the received light into electrical energy;

[0008] The flexible circuit board is arranged in the peripheral area of ​​the display panel, and the energy recovery structure is connected to the power control module through the flexible circuit board. The power control module is used to provide the electric energy converted by the energy recovery structure to the battery that powers the display module.

[0009] Optionally, the energy recovery structure includes a photoelectric conversion layer;

[0010] The display area includes a plurality of sub-pixels, each sub-pixel includes an effective light-emitting area, and the orthographic projection of the photoelectric conversion layer on the display panel is located around each effective light-emitting area; or

[0011] The photoelectric conversion layer covers the entire display area of ​​the display panel.

[0012] Optionally, the photoelectric conversion layer is formed into a grid structure.

[0013] Optionally, the energy recovery structure further includes a first transparent electrode layer, a first carrier transport layer, a second carrier transport layer, and a second transparent electrode layer stacked in sequence in a direction away from the display panel, and the photoelectric conversion layer is located between the first carrier transport layer and the second carrier transport layer;

[0014] The orthographic projection of the first transparent electrode layer on the display panel is located around the effective light-emitting area of ​​each sub-pixel, or covers the entire display area of ​​the display panel;

[0015] The orthographic projection of the first carrier transport layer on the display panel is located around the effective light-emitting area of ​​each sub-pixel, or covers the entire display area of ​​the display panel;

[0016] The orthographic projection of the second carrier transport layer on the display panel is located at the periphery of the effective light emitting area of ​​each sub-pixel, or covers the entire display area of ​​the display panel;

[0017] The orthographic projection of the second transparent electrode layer on the display panel is located at the periphery of the effective light emitting area of ​​each sub-pixel, or covers the entire display area of ​​the display panel.

[0018] Optionally, in the display area, at least one of the orthographic projection of the first transparent electrode layer on the display panel, the orthographic projection of the first carrier transport layer on the display panel, the orthographic projection of the second carrier transport layer on the display panel, and the orthographic projection of the second transparent electrode layer on the display panel overlaps with the orthographic projection of the photoelectric conversion layer on the display panel.

[0019] Optionally, the energy recovery structure further includes a first transparent electrode layer, a first carrier transport layer, a second carrier transport layer, and a second transparent electrode layer stacked in sequence in a direction away from the display panel, and the photoelectric conversion layer is located between the first carrier transport layer and the second carrier transport layer;

[0020] The first transparent electrode layer and / or the second transparent electrode layer comprises:

[0021] A plurality of electrode rings have a same center, the radii of the plurality of electrode rings increase successively, and the plurality of electrode rings are nested in sequence along the radial direction; the electrode rings have openings, the first ends of the openings of the electrode rings are coupled via a first connecting portion, and the second ends of the openings of the electrode rings are coupled via a second connecting portion.

[0022] Optionally, the first carrier transport layer covers the first transparent electrode layer, the first carrier transport layer fills the step difference caused by the electrode ring in the first transparent electrode layer, and the surface of the first carrier transport layer facing away from the display panel is flat; and / or the surface of the second carrier transport layer facing away from the display panel has a plurality of grooves, and the electrode rings in the second transparent electrode layer are located in the corresponding grooves.

[0023] Optionally, the energy recovery structure includes a first transparent electrode layer, a first carrier transport layer, a photoelectric conversion layer, a second carrier transport layer and a second transparent electrode layer which are sequentially stacked in a direction away from the display panel;

[0024] The peripheral area includes a first electrode connection line and a second electrode connection line, the first electrode connection line is coupled to the first transparent electrode layer, and the second electrode connection line is coupled to the second transparent electrode layer;

[0025] The flexible circuit board includes a first electrode adapter wire and a second electrode adapter wire, the first electrode adapter wire is coupled to the first electrode connecting wire, the second electrode adapter wire is coupled to the second electrode connecting wire, and the first electrode adapter wire and the second electrode adapter wire are respectively coupled to the power control module.

[0026] Based on the technical solution of the above display module, a second aspect of the present invention provides a display device including the above display module.

[0027] Based on the technical solution of the above display module, the third aspect of the present invention provides a method for manufacturing a display module, which is used to manufacture the above display module; the manufacturing method comprises:

[0028] An energy recovery structure is fabricated on the light-emitting side of the display panel; the display panel comprises a display area and a peripheral area located around the display area; the energy recovery structure is used to convert the light energy of the received light into electrical energy;

[0029] A flexible circuit board is bound to the peripheral area, and the energy recovery structure is connected to a power control module through the flexible circuit board. The power control module is used to provide the electric energy converted by the energy recovery structure to a battery that powers the display module.

[0030] Optionally, the energy recovery structure includes a photoelectric conversion layer, and the steps of manufacturing the photoelectric conversion layer specifically include:

[0031] Method 1: using a first evaporation source to evaporate a first precursor, and using a second evaporation source to evaporate a second precursor, the first precursor and the second precursor pass through corresponding masks to form the photoelectric conversion layer; or, method 2: forming a first precursor film layer by spin coating or scraping, and then forming a second precursor film layer on the first precursor film layer by spin coating or scraping, the first precursor material in the first precursor film layer reacts with the second precursor material in the second precursor film layer to form the photoelectric conversion layer.

[0032] Optionally, the photoelectric conversion layer includes a grid structure, and the step of forming the photoelectric conversion layer in the first method specifically includes:

[0033] Using a first evaporation source to evaporate a first precursor, and using a second evaporation source to evaporate a second precursor, the first precursor and the second precursor passing through a first mask to form a first portion extending along a first direction in the grid-like structure;

[0034] The first precursor is evaporated by the first evaporation source, and the second precursor is evaporated by the second evaporation source. After the first precursor and the second precursor pass through the second mask, a second portion extending along the second direction in the grid structure is formed.

[0035] Optionally, the energy recovery structure includes a first transparent electrode layer, a first carrier transport layer, a photoelectric conversion layer, a second carrier transport layer and a second transparent electrode layer which are sequentially stacked in a direction away from the display panel;

[0036] The first transparent electrode layer includes a grid-like structure, and the steps of manufacturing the first transparent electrode layer specifically include: using an evaporation source to evaporate a first transparent electrode material, and the first transparent electrode material passes through a first mask to form a third portion of the grid-like structure extending along a first direction; using an evaporation source to evaporate the first transparent electrode material, and the first transparent electrode material passes through a second mask to form a fourth portion of the grid-like structure extending along a second direction; and / or,

[0037] The first carrier transport layer includes a grid structure, and the steps of manufacturing the first carrier transport layer specifically include: using an evaporation source to evaporate a first carrier material, and the first carrier material passes through a first mask to form a fifth portion of the grid structure extending along the first direction; using an evaporation source to evaporate the first carrier material, and the first carrier material passes through a second mask to form a sixth portion of the grid structure extending along the second direction; and / or,

[0038] The second carrier transport layer includes a grid structure, and the steps of manufacturing the second carrier transport layer specifically include: using an evaporation source to evaporate a second carrier material, and the second carrier material passes through a first mask to form a seventh portion of the grid structure extending along the first direction; using an evaporation source to evaporate a second carrier material, and the second carrier material passes through a second mask to form an eighth portion of the grid structure extending along the second direction; and / or,

[0039] The second transparent electrode layer includes a grid structure, and the steps of making the second transparent electrode layer specifically include: using an evaporation source to evaporate a second transparent electrode material, and after the second transparent electrode material passes through a first mask, a ninth portion of the grid structure extending along the first direction is formed; using an evaporation source to evaporate a second transparent electrode material, and after the second transparent electrode material passes through a second mask, a tenth portion of the grid structure extending along the second direction is formed.

[0040] Optionally, the energy recovery structure includes a first transparent electrode layer, a first carrier transport layer, a photoelectric conversion layer, a second carrier transport layer and a second transparent electrode layer which are sequentially stacked in a direction away from the display panel;

[0041] The step of making the first transparent electrode layer specifically includes: using an evaporation source to evaporate a first transparent electrode material, the first transparent electrode material passes through a corresponding mask to form the first transparent electrode layer, the first transparent electrode layer includes a plurality of electrode rings, the plurality of electrode rings have the same center, the radius of the plurality of electrode rings increases sequentially, and the plurality of electrode rings are nested sequentially along the radial direction; the electrode rings have openings, the first ends of the openings of the electrode rings are coupled through a first connecting portion, and the second ends of the openings of the electrode rings are coupled through a second connecting portion; and / or,

[0042] The step of making the first carrier transport layer specifically includes: using a first carrier material to form the first carrier transport layer by spin coating or scraping, the first carrier transport layer covers the first transparent electrode layer, the first carrier transport layer fills the step generated by the electrode ring in the first transparent electrode layer, and the surface of the first carrier transport layer facing away from the display panel is flat; and / or,

[0043] The step of making the second carrier transport layer specifically includes: using a second carrier material to form a second carrier transport transition layer by spin coating or scraping, patterning the second carrier transport transition layer, making a plurality of grooves on a surface of the second carrier transport transition layer facing away from the display panel to form the second carrier transport layer; and / or,

[0044] The steps of making the second transparent electrode layer specifically include: using an evaporation source to evaporate a second transparent electrode material, and the second transparent electrode material passes through a corresponding mask to form the second transparent electrode layer, the first transparent electrode layer includes a plurality of electrode rings, and the electrode rings in the second transparent electrode layer are located in the corresponding grooves.

[0045] The technical solution provided by the present invention includes a display panel, an energy recovery structure, a flexible circuit board and a power control module; the energy recovery structure is located on the light-emitting side of the display panel, and can convert the light energy of the received light into electrical energy; the energy recovery structure is connected to the power control module through the flexible circuit board, and the power control module can provide the electrical energy converted by the energy recovery structure to the battery that supplies power to the display module. Therefore, in the technical solution provided by the present invention, the energy recovery structure generates electrical energy by absorbing external natural light and scattered light emitted by the display panel, and enters the power control module for rectification through the wiring in the peripheral area of ​​the display panel and the wiring on the flexible circuit board, and finally replenishes electrical energy for the battery of the whole machine, thereby improving the battery life of the display product. In addition, the energy recovery structure reduces the reflection of ultraviolet rays by the display module screen through the absorption of natural light, improves the screen contrast, reduces human eye stimulation, and can replace the function of the polarizer in the display module to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0047] Figure 1 A schematic cross-sectional view of a display module provided by an embodiment of the present invention;

[0048] Figure 2 A schematic diagram of energy transmission provided by an embodiment of the present invention;

[0049] Figure 3 A schematic diagram of the structure of a display module provided by an embodiment of the present invention;

[0050] Figure 4 A schematic diagram of a first mask provided by an embodiment of the present invention;

[0051] Figure 5 A schematic diagram of a second mask provided by an embodiment of the present invention;

[0052] Figure 6 A schematic diagram of a pattern structure formed by using a first mask provided in an embodiment of the present invention;

[0053] Figure 7A schematic diagram of a pattern structure formed by using a second mask provided in an embodiment of the present invention;

[0054] Figure 8 A schematic diagram of a pattern structure formed by using a first mask and a second mask provided in an embodiment of the present invention;

[0055] Fig. 9 A schematic diagram of manufacturing a photoelectric conversion layer using an evaporation source provided in an embodiment of the present invention;

[0056] Fig.10 A schematic diagram of another photoelectric conversion layer that fully covers the display area in the display module provided by an embodiment of the present invention;

[0057] Fig.11 A schematic diagram of another transparent electrode layer included in a display module provided by an embodiment of the present invention;

[0058] Fig.12 A cross-sectional schematic diagram of another energy recovery structure included in a display module provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0059] In order to further illustrate the display module and its manufacturing method, and the display device provided by the embodiments of the present invention, a detailed description is given below in conjunction with the accompanying drawings of the specification.

[0060] See also Figures 1 to 3 , an embodiment of the present invention provides a display module, including: a display panel 20, an energy recovery structure 21, a flexible circuit board FPC and a power control module;

[0061] The display panel 20 includes a display area and a peripheral area located around the display area;

[0062] The energy recovery structure 21 is located at the light-emitting side of the display panel 20, and the energy recovery structure 21 is used to convert the light energy of the received light into electrical energy;

[0063] The flexible circuit board FPC is arranged in the peripheral area of ​​the display panel 20, and the energy recovery structure 21 is connected to the power control module through the flexible circuit board FPC. The power control module is used to provide the electric energy converted by the energy recovery structure 21 to the battery that powers the display module.

[0064] Need to explain, Figure 3 The middle arrow points to the power control module and battery.

[0065] Exemplarily, the display panel 20 includes a display area and a peripheral area, the peripheral area surrounds the display area, and the display area includes a rectangular display area, a circular display area, etc., but is not limited thereto. The display area includes a plurality of sub-pixels, each of which has an effective light-emitting area 30, which is a pixel opening area defined by a pixel defining layer in the display panel 20. The entire display area includes the effective light-emitting area 30 of each sub-pixel, and the non-effective light-emitting area 30 located around each effective light-emitting area 30.

[0066] Exemplarily, at least a portion of the orthographic projection of the energy recovery structure 21 on the display panel 20 is located in the display area, and the energy recovery structure 21 can absorb light emitted by the display panel 20 and natural light in the environment, and convert the light energy of these lights into electrical energy.

[0067] Exemplarily, the energy recovery structure 21 includes a first transparent electrode layer 12, a first carrier transport layer 13, a photoelectric conversion layer 14, a second carrier transport layer 15 and a second transparent electrode layer 16 which are stacked in sequence in a direction away from the display panel 20; the peripheral area includes a first electrode connection line 41 and a second electrode connection line 42, the first electrode connection line 41 is coupled to the first transparent electrode layer 12, and the second electrode connection line 42 is coupled to the second transparent electrode layer 16; the flexible circuit board FPC includes a first electrode connection line 43 and a second electrode connection line 44, the first electrode connection line 43 is coupled to the first electrode connection line 41, the second electrode connection line 44 is coupled to the second electrode connection line 42, and the first electrode connection line 43 and the second electrode connection line 44 are respectively coupled to the power control module.

[0068] Exemplarily, the display panel 20 further includes a DDIC chip located in the peripheral area, and the flexible circuit board FPC further includes a DDIC chip. Figure 3 The binding area 46, the connector 45 and the PAD area are also illustrated. At least part of the first electrode connection line 41 and the second electrode connection line 42 are located in the PAD area, and bypass the DDIC chip located in the peripheral area, and can be connected to the pins of the flexible circuit board FPC in the binding area. The first electrode adapter line 43 and the second electrode adapter line 44 are located in the edge area of ​​the flexible circuit board FPC, and are connected to the connector 45 connected to the whole machine. Through the binding of the flexible circuit board FPC to the PAD area, and the connection of the connector 45 to the whole machine, the energy recovery structure 21 can form a photoelectric conversion circuit with the whole machine, provide electrical energy for the battery in the whole machine, thereby improving the battery life of the device. It should be noted that the power control module can also be arranged in the whole machine, and the first electrode adapter line 43 and the second electrode adapter line 44 are connected to the power control module in the whole machine through the connector 45.

[0069] Exemplarily, the first transparent electrode layer 12 serves as a cathode electrode of the energy recovery structure 21, and the second transparent electrode layer 16 serves as an anode electrode of the energy recovery structure 21, but is not limited thereto. The first carrier transport layer 13 includes an electron transport layer, and the second carrier transport layer 15 includes a hole transport layer. The photoelectric conversion layer 14 includes a perovskite photoelectric conversion layer.

[0070] Exemplarily, the first electrode adapter wire 43 and the second electrode adapter wire 44 may be coupled to the power control module via a connector 45 , or the power control module may be integrated on the flexible circuit board FPC.

[0071] Exemplarily, the display panel 20 includes a driving backplane 10 and a light-emitting element layer 11, the driving backplane 10 includes a plurality of sub-pixel driving circuits distributed in an array, the light-emitting element layer 11 includes a plurality of light-emitting elements 11 distributed in an array, the sub-pixel includes a sub-pixel driving circuit and a light-emitting element 11, the light-emitting element 11 includes an anode layer, an organic light-emitting layer and a cathode layer arranged in a stacked manner, and the anode layer is coupled to the sub-pixel driving circuit. The display panel 20 also includes an encapsulation layer, which is located between the light-emitting element 11 layer and the energy recovery structure 21. The display module also includes a touch layer 17, which is located on the side of the energy recovery structure 21 facing away from the display panel 20.

[0072] In more detail, when the display module is working, natural light passes through the touch layer 17 (TSP layer), the second transparent electrode layer 16 and the second carrier transport layer 15 in sequence, and is absorbed by the photoelectric conversion layer 14. Part of the natural light passes through the first carrier transport layer 13 and the first transparent electrode layer 12 below, is reflected by the driving backplane 10, and is absorbed by the photoelectric conversion layer 14 again, thereby enhancing the photoelectric conversion efficiency. At the same time, part of the scattered light generated by the light-emitting element 11 can also be absorbed by the photoelectric conversion layer 14, and the scattered light is recycled. After the photoelectric conversion layer 14 absorbs the light, it promotes the movement of charges between the second carrier transport layer 15 and the first carrier transport layer 13. After passing through the first transparent electrode layer 12 and the second transparent electrode layer 16, a voltage is generated between the first transparent electrode layer 12 and the second transparent electrode layer 16, thereby realizing the conversion of light energy into electrical energy.

[0073] According to the specific structure of the above-mentioned display module, the display module provided in the embodiment of the present invention includes a display panel 20, an energy recovery structure 21, a flexible circuit board FPC and a power control module; the energy recovery structure 21 is located on the light-emitting side of the display panel 20, and can convert the light energy of the received light into electrical energy; the energy recovery structure 21 is connected to the power control module through the flexible circuit board FPC, and the power control module can provide the electrical energy converted by the energy recovery structure 21 to the battery that powers the display module. Therefore, in the display module provided in the embodiment of the present invention, the energy recovery structure 21 generates electrical energy by absorbing external natural light and scattered light emitted by the display panel 20, and enters the power control module for rectification through the wiring in the peripheral area of ​​the display panel 20 and the wiring on the flexible circuit board FPC, and finally replenishes the electrical energy for the whole machine battery, thereby improving the battery life of the display product.

[0074] In addition, the energy recovery structure 21 reduces the reflection of ultraviolet rays by the display module screen by absorbing natural light, improves the screen contrast, and reduces stimulation to the human eye. To a certain extent, it can replace the function of the polarizer in the display module, which is beneficial to reducing the number of module stacking materials.

[0075] like Figures 1 to 3 As shown, in some embodiments, the energy recovery structure 21 includes a photoelectric conversion layer 14; the display area includes a plurality of sub-pixels, the sub-pixels include an effective light-emitting area 30, and the photoelectric conversion layer 14 is projected onto the display panel 20 and is located around each effective light-emitting area 30.

[0076] Exemplarily, the photoelectric conversion layer 14 is formed into a grid structure.

[0077] For example, when the photoelectric conversion layer 14 is set to a grid structure, the first transparent electrode layer 12 and the second transparent electrode layer 16 can be set to completely cover the display area, which can increase the contact area with the photoelectric conversion layer 14, improve the current density, and thus improve the power supply rate.

[0078] Since the light transmittance of the photoelectric conversion layer 14 of different materials is different, materials with high photoelectric conversion efficiency usually have poor light transmittance, and the photoelectric conversion layer 14 covering the entire surface may affect the brightness and display effect of the screen. The above-mentioned setting method can make the photoelectric conversion layer 14 avoid the effective light-emitting area 30 and be distributed in the gap area between sub-pixels (that is, the non-effective light-emitting area around the effective light-emitting area 30), avoiding the low-light-transmittance photoelectric conversion layer 14 from blocking the light source emitted by the light-emitting element 11 in the display panel 20, while taking into account the photoelectric conversion efficiency, ensuring the display effect of the screen.

[0079] like Fig.10As shown, in some embodiments, the photoelectric conversion layer 14 covers the entire display area of ​​the display panel 20 .

[0080] The above configuration increases the area of ​​the photoelectric conversion layer 14 , so that the photoelectric conversion layer 14 can receive light in a larger area, thereby achieving more electrical energy conversion.

[0081] The display module provided in the above embodiment can realize photoelectric conversion layers with different light transmittances through photoelectric conversion layers with different structural forms, thereby ensuring the photoelectric conversion efficiency while taking into account the display effect of the display module.

[0082] like Figures 1 to 3 , Fig.10 As shown, in some embodiments, the energy recovery structure 21 further includes a first transparent electrode layer 12, a first carrier transport layer 13, a second carrier transport layer 15, and a second transparent electrode layer 16 which are sequentially stacked in a direction away from the display panel 20, and the photoelectric conversion layer 14 is located between the first carrier transport layer 13 and the second carrier transport layer 15;

[0083] The orthographic projection of the first transparent electrode layer 12 on the display panel 20 is located around the effective light-emitting area 30 of each sub-pixel, or covers the entire display area of ​​the display panel 20;

[0084] The orthographic projection of the first carrier transport layer 13 on the display panel 20 is located around the effective light emitting area 30 of each sub-pixel, or covers the entire display area of ​​the display panel 20;

[0085] The orthographic projection of the second carrier transport layer 15 on the display panel 20 is located around the effective light emitting area 30 of each sub-pixel, or covers the entire display area of ​​the display panel 20;

[0086] The orthographic projection of the second transparent electrode layer 16 on the display panel 20 is located around the effective light emitting area 30 of each sub-pixel, or covers the entire display area of ​​the display panel 20 .

[0087] Exemplarily, in the display area, at least one of the orthographic projection of the first transparent electrode layer 12 on the display panel 20, the orthographic projection of the first carrier transport layer 13 on the display panel 20, the orthographic projection of the second carrier transport layer 15 on the display panel 20, and the orthographic projection of the second transparent electrode layer 16 on the display panel 20 overlaps with the orthographic projection of the photoelectric conversion layer 14 on the display panel 20.

[0088] Exemplarily, the first transparent electrode layer 12, the first carrier transport layer 13, the second carrier transport layer 15 and the second transparent electrode layer 16 are made by single evaporation source evaporation. The first carrier transport layer 13 uses nickel oxide material as an evaporation source, and the second carrier transport layer 15 uses poly (3,4-ethylenedioxythiophene) polystyrene sulfonate material as an evaporation source.

[0089] In the display module provided in the above embodiment, the specific structures of the first transparent electrode layer 12, the first carrier transport layer 13, the second carrier transport layer 15 and the second transparent electrode layer 16 can be set according to actual needs to better match the light extraction rate and power supply rate of the display module.

[0090] like Figures 10 to 12 As shown, in some embodiments, the energy recovery structure 21 further includes a first transparent electrode layer 12, a first carrier transport layer 13, a second carrier transport layer 15, and a second transparent electrode layer 16 which are sequentially stacked in a direction away from the display panel 20, and the photoelectric conversion layer 14 is located between the first carrier transport layer 13 and the second carrier transport layer 15; the first transparent electrode layer 12 and / or the second transparent electrode layer 16 include:

[0091] A plurality of electrode rings 60 have a same center, the radii of the plurality of electrode rings 60 increase successively, and the plurality of electrode rings 60 are nested in sequence along the radial direction; the electrode rings 60 have openings, the first ends of the openings of the electrode rings 60 are coupled via a first connecting portion 61, and the second ends of the openings of the electrode rings 60 are coupled via a second connecting portion 62.

[0092] Exemplarily, the photoelectric conversion layer 14 is made of a material with high light transmittance and completely covers the display area, thereby increasing the effective absorption area of ​​the light source.

[0093] Exemplarily, the plurality of electrode rings 60 are distributed in an array along a radial direction, the first connection portion 61 and the second connection portion 62 are coupled to each other, and are coupled to corresponding electrode transfer wires on a flexible circuit board FPC.

[0094] like Fig.12 As shown, exemplarily, the first carrier transport layer 13 covers the first transparent electrode layer 12, the first carrier transport layer 13 fills the step difference generated by the electrode ring 60 in the first transparent electrode layer 12, and the surface of the first carrier transport layer 13 facing away from the display panel 20 is flat; and / or the surface of the second carrier transport layer 15 facing away from the display panel 20 has a plurality of grooves, and the electrode ring 60 in the second transparent electrode layer 16 is located in the corresponding grooves.

[0095] The above arrangement enables the carrier transport layer to contact the side surfaces of each electrode ring 60 in the transparent electrode layer, thereby increasing the contact area between the carrier transport layer and the transparent electrode layer, improving the current density of electrons between the carrier transport layer and the transparent electrode layer, and improving the power supply rate of the entire battery.

[0096] An embodiment of the present invention further provides a display device, comprising the display module provided by the above embodiment.

[0097] It should be noted that the display device may be any product or component with a display function, such as a television, a monitor, a digital photo frame, a mobile phone, a tablet computer, etc., wherein the display device also includes a flexible circuit board FPC, a printed circuit board and a backplane, etc. Exemplarily, the display device includes an OLED mobile phone, a wearable device, etc., but is not limited thereto.

[0098] In the display module provided in the above embodiment, the energy recovery structure 21 generates electric energy by absorbing external natural light and scattered light emitted by the display panel 20, and enters the power control module for rectification through the wiring in the peripheral area of ​​the display panel 20 and the wiring on the flexible circuit board FPC, and finally replenishes electric energy for the whole battery, thereby improving the battery life of the display product. The display device provided in the embodiment of the present invention also has the above beneficial effects when including the above display module, which will not be repeated here.

[0099] The embodiment of the present invention further provides a method for manufacturing a display module, which is used to manufacture the display module provided by the above embodiment; the manufacturing method comprises:

[0100] An energy recovery structure 21 is fabricated on the light-emitting side of the display panel 20; the display panel 20 includes a display area and a peripheral area around the display area; the energy recovery structure 21 is used to convert the light energy of the received light into electrical energy;

[0101] A flexible circuit board FPC is bound to the peripheral area, and the energy recovery structure 21 is connected to a power control module through the flexible circuit board FPC. The power control module is used to provide the electric energy converted by the energy recovery structure 21 to a battery that powers the display module.

[0102] In the display module manufactured by the manufacturing method provided in the embodiment of the present invention, the energy recovery structure 21 generates electrical energy by absorbing external natural light and scattered light emitted by the display panel 20, and enters the power control module for rectification through the wiring in the peripheral area of ​​the display panel 20 and the wiring on the flexible circuit board FPC, and finally replenishes electrical energy for the battery of the whole machine, thereby improving the battery life of the display product.

[0103] like Fig. 9As shown, in some embodiments, the energy recovery structure 21 includes a photoelectric conversion layer 14, and the steps of making the photoelectric conversion layer 14 specifically include: Method 1: using a first evaporation source 71 to evaporate a first precursor, and using a second evaporation source 72 to evaporate a second precursor, and the first precursor and the second precursor pass through corresponding mask plates to form the photoelectric conversion layer 14.

[0104] Exemplarily, the first evaporation source 71 and the second evaporation source 72 are heated at the same time, so that the organic precursor included in the first precursor and the halide included in the second precursor are sublimated at high temperature, and after passing through the corresponding mask, they are attached to the first carrier transport layer 13, and the organic precursor and the halide fully react to generate perovskite crystals, thereby forming the photoelectric conversion layer 14.

[0105] Exemplarily, formamidine is used as the organic precursor and lead bromide is used as the halide, but the invention is not limited thereto.

[0106] like Fig.10 and Fig.12 As shown, in some embodiments, the energy recovery structure 21 includes a photoelectric conversion layer 14, and the steps of making the photoelectric conversion layer 14 specifically include: Method 2: forming a first precursor film layer by spin coating or scraping, and then forming a second precursor film layer on the first precursor film layer by spin coating or scraping, the first precursor material in the first precursor film layer reacts with the second precursor material in the second precursor film layer to form the photoelectric conversion layer 14.

[0107] Exemplarily, the photoelectric conversion layer 14 is formed by spin coating or scraping an organic cationic material and a halide in sequence, and the two materials react fully to form the photoelectric conversion layer 14 .

[0108] like Figure 3 , Figure 8 and Fig. 9 As shown, in some embodiments, the photoelectric conversion layer 14 includes a grid structure, and the steps of forming the photoelectric conversion layer 14 in the first method specifically include:

[0109] The first precursor is evaporated by the first evaporation source 71, and the second precursor is evaporated by the second evaporation source 72. After the first precursor and the second precursor pass through the first mask 51, a first part extending along the first direction in the grid structure is formed;

[0110] The first precursor is evaporated by the first evaporation source 71 , and the second precursor is evaporated by the second evaporation source 72 . After the first precursor and the second precursor pass through the second mask 52 , a second portion extending along the second direction in the grid structure is formed.

[0111] For example, Figure 4 As shown, the first mask 51 is a hollowed-out inclined structure facing right, and the hollowed-out area overlaps with the pixel gap (i.e., the non-effective light-emitting area 30). Based on the first mask 51, the left inclined part of the grid-like structure can be evaporated, as shown in FIG. Figure 6 The AA1 coating structure is shown in Figure 1. Figure 5 As shown, the second mask 52 is a hollow structure tilted to the left. Based on the second mask 52, the following can be formed: Figure 7 The evaporation shapes of the first mask 51 and the second mask 52 are complementary, and the two shapes are located in the same layer, which can form a grid structure avoiding the effective light-emitting area 30, as shown in FIG. Figure 8 The BB structure is shown.

[0112] In some embodiments, the energy recovery structure 21 includes a first transparent electrode layer 12, a first carrier transport layer 13, a photoelectric conversion layer 14, a second carrier transport layer 15 and a second transparent electrode layer 16 which are sequentially stacked in a direction away from the display panel 20;

[0113] The first transparent electrode layer 12 includes a grid structure, and the steps of manufacturing the first transparent electrode layer 12 specifically include: using an evaporation source to evaporate a first transparent electrode material, and the first transparent electrode material passes through a first mask 51 to form a third portion of the grid structure extending along the first direction; using an evaporation source to evaporate the first transparent electrode material, and the first transparent electrode material passes through a second mask 52 to form a fourth portion of the grid structure extending along the second direction; and / or,

[0114] The first carrier transport layer 13 includes a grid structure, and the steps of making the first carrier transport layer 13 specifically include: using an evaporation source to evaporate a first carrier material, and the first carrier material passes through a first mask 51 to form a fifth portion extending along the first direction in the grid structure; using an evaporation source to evaporate the first carrier material, and the first carrier material passes through a second mask 52 to form a sixth portion extending along the second direction in the grid structure; and / or,

[0115] The second carrier transport layer 15 includes a grid structure, and the steps of making the second carrier transport layer 15 specifically include: using an evaporation source to evaporate a second carrier material, and the second carrier material passes through a first mask 51 to form a seventh portion extending along the first direction in the grid structure; using an evaporation source to evaporate a second carrier material, and the second carrier material passes through a second mask 52 to form an eighth portion extending along the second direction in the grid structure; and / or,

[0116] The second transparent electrode layer 16 includes a grid structure, and the steps of making the second transparent electrode layer 16 specifically include: using an evaporation source to evaporate a second transparent electrode material, and after the second transparent electrode material passes through a first mask 51, a ninth portion extending along the first direction in the grid structure is formed; using an evaporation source to evaporate a second transparent electrode material, and after the second transparent electrode material passes through a second mask 52, a tenth portion extending along the second direction in the grid structure is formed.

[0117] It should be noted that the above-mentioned grid structures can all be referred to as Figure 8 The BB structure is shown.

[0118] Exemplarily, the mask used to make the first transparent electrode layer 12 , the first carrier transport layer 13 , the second carrier transport layer 15 and the second transparent electrode layer 16 is the same as the mask used to make the photoelectric conversion layer 14 , but is not limited thereto.

[0119] like Figure 1 , Figures 10 to 12 As shown, in some embodiments, the energy recovery structure 21 includes a first transparent electrode layer 12, a first carrier transport layer 13, a photoelectric conversion layer 14, a second carrier transport layer 15 and a second transparent electrode layer 16 which are sequentially stacked in a direction away from the display panel 20;

[0120] The steps of making the first transparent electrode layer 12 specifically include: using an evaporation source to evaporate a first transparent electrode material, the first transparent electrode material passes through a corresponding mask to form the first transparent electrode layer 12, the first transparent electrode layer includes a plurality of electrode rings 60, the plurality of electrode rings 60 have the same center, the radius of the plurality of electrode rings 60 increases sequentially, and the plurality of electrode rings 60 are nested sequentially along the radial direction; the electrode rings 60 have openings, the first ends of the openings of the electrode rings 60 are coupled through a first connecting portion 61, and the second ends of the openings of the electrode rings 60 are coupled through a second connecting portion 62; and / or,

[0121] The step of making the first carrier transport layer 13 specifically includes: using a first carrier material to form the first carrier transport layer 13 by spin coating or scraping, the first carrier transport layer 13 covers the first transparent electrode layer 12, the first carrier transport layer 13 fills the step generated by the electrode ring 60 in the first transparent electrode layer 12, and the surface of the first carrier transport layer 13 facing away from the display panel 20 is flat; and / or,

[0122] The steps of making the second carrier transport layer 15 specifically include: using a second carrier material to form a second carrier transport transition layer by spin coating or scraping, patterning the second carrier transport transition layer, and making a plurality of grooves on the surface of the second carrier transport transition layer facing away from the display panel 20 to form the second carrier transport layer 15; and / or,

[0123] The steps of making the second transparent electrode layer 16 specifically include: using an evaporation source to evaporate a second transparent electrode material, and the second transparent electrode material passes through a corresponding mask to form the second transparent electrode layer 16, the first transparent electrode layer includes a plurality of electrode rings 60, the plurality of electrode rings 60 have the same center, the radius of the plurality of electrode rings 60 increases sequentially, and the plurality of electrode rings 60 are nested and arranged sequentially along the radial direction; the electrode rings 60 have openings, the first ends of the openings of the electrode rings 60 are coupled through a first connecting portion 61, and the second ends of the openings of the electrode rings 60 are coupled through a second connecting portion 62, and the electrode rings 60 in the second transparent electrode layer 16 are located in the corresponding grooves.

[0124] Exemplarily, the structure of the plurality of electrode rings 60 can be formed by vapor deposition using a mask of a corresponding shape.

[0125] Exemplarily, the first carrier transport layer 13 , the photoelectric conversion layer 14 , and the second carrier transport layer 15 are all formed by spin coating or scraping to form a coating layer with a flat surface away from the display panel 20 .

[0126] The material of the spin-coated first carrier transport layer 13 can fill the gaps between the electrode rings 60 in the first transparent electrode layer 12 . Similarly, the material of the second carrier transport layer 15 can fill the gaps between the electrode rings 60 in the second transparent electrode layer 16 .

[0127] The above configuration increases the contact area between the carrier transport layer and the transparent electrode layer, effectively improves the carrier density between the first carrier transport layer 13, the second carrier transport layer 15 and the transparent electrode layer, and improves the power supply rate of the whole battery.

[0128] It should be noted that the "same layer" in the embodiment of the present invention may refer to a film layer on the same structural layer. Or, for example, a film layer on the same layer may be a film layer for forming a specific pattern formed by the same film forming process, and then the film layer is patterned by the same mask through a single composition process to form a layer structure. Depending on the specific pattern, a single composition process may include multiple exposure, development or etching processes, and the specific pattern in the formed layer structure may be continuous or discontinuous. These specific patterns may also be at different heights or have different thicknesses.

[0129] In the various method embodiments of the present invention, the serial numbers of the steps cannot be used to limit the sequence of the steps. For ordinary technicians in this field, without paying creative work, changes to the sequence of the steps are also within the protection scope of the present invention.

[0130] It should be noted that each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the method embodiment, since it is basically similar to the product embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the product embodiment.

[0131] Unless otherwise defined, the technical terms or scientific terms used in this disclosure should be understood by people with ordinary skills in the field to which the present invention belongs. "First", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect", "couple" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0132] It will be understood that when an element such as a layer, film, region, or substrate is referred to as being “on” or “under” another element, it can be “directly on” or “under” the other element or intervening elements may be present.

[0133] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0134] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A display module, characterized in that: include: display panel, energy recovery structure, flexible circuit board and power control module; The display panel includes a display area and a peripheral area located around the display area; The energy recovery structure is located at the light-emitting side of the display panel, and is used to convert the light energy of the received light into electrical energy; The flexible circuit board is arranged in the peripheral area of ​​the display panel, and the energy recovery structure is connected to the power control module through the flexible circuit board. The power control module is used to provide the electric energy converted by the energy recovery structure to the battery that powers the display module.

2. The display module according to claim 1, characterized in that: The energy recovery structure includes a photoelectric conversion layer; The display area includes a plurality of sub-pixels, each of which includes an effective light-emitting area, and the orthographic projection of the photoelectric conversion layer on the display panel is located around each effective light-emitting area; or, The photoelectric conversion layer covers the entire display area of ​​the display panel.

3. The display module according to claim 2, characterized in that: The photoelectric conversion layer is formed into a grid-like structure.

4. The display module according to claim 2 or 3, characterized in that: The energy recovery structure further includes a first transparent electrode layer, a first carrier transport layer, a second carrier transport layer, and a second transparent electrode layer which are sequentially stacked in a direction away from the display panel, and the photoelectric conversion layer is located between the first carrier transport layer and the second carrier transport layer; The orthographic projection of the first transparent electrode layer on the display panel is located around the effective light-emitting area of ​​each sub-pixel, or covers the entire display area of ​​the display panel; The orthographic projection of the first carrier transport layer on the display panel is located around the effective light-emitting area of ​​each sub-pixel, or covers the entire display area of ​​the display panel; The orthographic projection of the second carrier transport layer on the display panel is located at the periphery of the effective light emitting area of ​​each sub-pixel, or covers the entire display area of ​​the display panel; The orthographic projection of the second transparent electrode layer on the display panel is located at the periphery of the effective light emitting area of ​​each sub-pixel, or covers the entire display area of ​​the display panel.

5. The display module according to claim 4, characterized in that: In the display area, at least one of the orthographic projection of the first transparent electrode layer on the display panel, the orthographic projection of the first carrier transport layer on the display panel, the orthographic projection of the second carrier transport layer on the display panel, and the orthographic projection of the second transparent electrode layer on the display panel overlaps with the orthographic projection of the photoelectric conversion layer on the display panel.

6. The display module according to claim 2 or 3, characterized in that: The energy recovery structure further includes a first transparent electrode layer, a first carrier transport layer, a second carrier transport layer, and a second transparent electrode layer which are sequentially stacked in a direction away from the display panel, and the photoelectric conversion layer is located between the first carrier transport layer and the second carrier transport layer; The first transparent electrode layer and / or the second transparent electrode layer comprises: A plurality of electrode rings, wherein the plurality of electrode rings have the same center, the radii of the plurality of electrode rings increase successively, and the plurality of electrode rings are nested and arranged successively along the radial direction; The electrode ring has an opening, and the first ends of the openings of the electrode rings are coupled via a first connecting portion, and the second ends of the openings of the electrode rings are coupled via a second connecting portion.

7. The display module according to claim 6, characterized in that: The first carrier transport layer covers the first transparent electrode layer, the first carrier transport layer fills the step generated by the electrode ring in the first transparent electrode layer, and the surface of the first carrier transport layer facing away from the display panel is flat; and / or, A surface of the second carrier transport layer facing away from the display panel has a plurality of grooves, and the electrode rings in the second transparent electrode layer are located in the corresponding grooves.

8. The display module according to any one of claims 1 to 3, characterized in that: The energy recovery structure comprises a first transparent electrode layer, a first carrier transport layer, a photoelectric conversion layer, a second carrier transport layer and a second transparent electrode layer which are sequentially stacked in a direction away from the display panel; The peripheral area includes a first electrode connection line and a second electrode connection line, the first electrode connection line is coupled to the first transparent electrode layer, and the second electrode connection line is coupled to the second transparent electrode layer; The flexible circuit board includes a first electrode adapter wire and a second electrode adapter wire, the first electrode adapter wire is coupled to the first electrode connecting wire, the second electrode adapter wire is coupled to the second electrode connecting wire, and the first electrode adapter wire and the second electrode adapter wire are respectively coupled to the power control module.

9. A display device, characterized in that: It comprises the display module as claimed in any one of claims 1 to 8.

10. A method for manufacturing a display module, characterized in that: Used to manufacture a display module as claimed in any one of claims 1 to 8; the manufacturing method comprises: An energy recovery structure is fabricated on the light-emitting side of the display panel; the display panel comprises a display area and a peripheral area located around the display area; the energy recovery structure is used to convert the light energy of the received light into electrical energy; A flexible circuit board is bound to the peripheral area, and the energy recovery structure is connected to a power control module through the flexible circuit board. The power control module is used to provide the electric energy converted by the energy recovery structure to a battery that powers the display module.

11. The method for manufacturing a display module according to claim 10, characterized in that: The energy recovery structure includes a photoelectric conversion layer, and the steps of manufacturing the photoelectric conversion layer specifically include: Method 1: using a first evaporation source to evaporate a first precursor, and using a second evaporation source to evaporate a second precursor, and the first precursor and the second precursor pass through corresponding masks to form the photoelectric conversion layer; or, Method 2: Form a first precursor film layer by spin coating or scraping, and then form a second precursor film layer on the first precursor film layer by spin coating or scraping, the first precursor material in the first precursor film layer reacts with the second precursor material in the second precursor film layer to form the photoelectric conversion layer.

12. The method for manufacturing a display module according to claim 11, characterized in that: The photoelectric conversion layer includes a grid-like structure, and the steps of forming the photoelectric conversion layer in the first method specifically include: Using a first evaporation source to evaporate a first precursor, and using a second evaporation source to evaporate a second precursor, the first precursor and the second precursor passing through a first mask to form a first portion extending along a first direction in the grid-like structure; The first precursor is evaporated by the first evaporation source, and the second precursor is evaporated by the second evaporation source. After the first precursor and the second precursor pass through the second mask, a second portion extending along the second direction in the grid structure is formed.

13. The method for manufacturing a display module according to claim 11, characterized in that: The energy recovery structure comprises a first transparent electrode layer, a first carrier transport layer, a photoelectric conversion layer, a second carrier transport layer and a second transparent electrode layer which are sequentially stacked in a direction away from the display panel; The first transparent electrode layer includes a grid-like structure, and the steps of manufacturing the first transparent electrode layer specifically include: using an evaporation source to evaporate a first transparent electrode material, and the first transparent electrode material passes through a first mask to form a third portion of the grid-like structure extending along a first direction; using an evaporation source to evaporate the first transparent electrode material, and the first transparent electrode material passes through a second mask to form a fourth portion of the grid-like structure extending along a second direction; and / or, The first carrier transport layer includes a grid structure, and the steps of manufacturing the first carrier transport layer specifically include: using an evaporation source to evaporate a first carrier material, and the first carrier material passes through a first mask to form a fifth portion of the grid structure extending along the first direction; using an evaporation source to evaporate the first carrier material, and the first carrier material passes through a second mask to form a sixth portion of the grid structure extending along the second direction; and / or, The second carrier transport layer includes a grid structure, and the steps of manufacturing the second carrier transport layer specifically include: using an evaporation source to evaporate a second carrier material, and the second carrier material passes through a first mask to form a seventh portion of the grid structure extending along the first direction; using an evaporation source to evaporate a second carrier material, and the second carrier material passes through a second mask to form an eighth portion of the grid structure extending along the second direction; and / or, The second transparent electrode layer includes a grid structure, and the steps of making the second transparent electrode layer specifically include: using an evaporation source to evaporate a second transparent electrode material, and after the second transparent electrode material passes through a first mask, a ninth portion of the grid structure extending along the first direction is formed; using an evaporation source to evaporate a second transparent electrode material, and after the second transparent electrode material passes through a second mask, a tenth portion of the grid structure extending along the second direction is formed.

14. The method for manufacturing a display module according to claim 11, characterized in that: The energy recovery structure comprises a first transparent electrode layer, a first carrier transport layer, a photoelectric conversion layer, a second carrier transport layer and a second transparent electrode layer which are sequentially stacked in a direction away from the display panel; The step of making the first transparent electrode layer specifically includes: using an evaporation source to evaporate a first transparent electrode material, the first transparent electrode material passes through a corresponding mask to form the first transparent electrode layer, the first transparent electrode layer includes a plurality of electrode rings, the plurality of electrode rings have the same center, the radius of the plurality of electrode rings increases sequentially, and the plurality of electrode rings are nested sequentially along the radial direction; the electrode rings have openings, the first ends of the openings of the electrode rings are coupled through a first connecting portion, and the second ends of the openings of the electrode rings are coupled through a second connecting portion; and / or, The step of making the first carrier transport layer specifically includes: using a first carrier material to form the first carrier transport layer by spin coating or scraping, the first carrier transport layer covers the first transparent electrode layer, the first carrier transport layer fills the step generated by the electrode ring in the first transparent electrode layer, and the surface of the first carrier transport layer facing away from the display panel is flat; and / or, The step of making the second carrier transport layer specifically includes: using a second carrier material to form a second carrier transport transition layer by spin coating or scraping, patterning the second carrier transport transition layer, making a plurality of grooves on a surface of the second carrier transport transition layer facing away from the display panel to form the second carrier transport layer; and / or, The steps of making the second transparent electrode layer specifically include: using an evaporation source to evaporate a second transparent electrode material, and the second transparent electrode material passes through a corresponding mask to form the second transparent electrode layer, the first transparent electrode layer includes a plurality of electrode rings, and the electrode rings in the second transparent electrode layer are located in the corresponding grooves.

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