Display device

Abstract

The invention relates to a display device. The display device comprises a display panel and a heat dissipation layer, the heat dissipation layer is arranged on one side of the display panel, and the heat dissipation layer comprises a substrate, a driving electrode layer arranged on one side of the substrate and a cooling liquid layer arranged on the side, away from the substrate, of the driving electrode layer; wherein the cooling liquid layer is arranged between the display panel and the substrate, the cooling liquid layer is provided with two kinds of immiscible fluid, and the driving electrode layer is configured to drive the fluid to flow. According to the display device, the heat dissipation layer is arranged on one side of the display panel, the fluid and the driving electrode layer are arranged in the heat dissipation layer, and the driving electrode layer can drive the fluid to flow, so that heat is taken away, the temperatures of all the areas of the display panel are close, and display color cast caused by temperature difference is reduced.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a display device. Background Technology

[0002] When a display device is working, different areas of the screen display different images, resulting in inconsistent temperatures across the screen. These temperature inconsistencies cause different junction temperatures in the LED (Light-Emitting Diode) chips, affecting the dominant wavelength of the light emitted by the LED chips and causing color distortion in the display. Summary of the Invention

[0003] This application provides a display device that improves the technical problem of color distortion caused by inconsistent temperatures in different areas of the screen.

[0004] To achieve the above objectives, this application provides a display device, comprising: Display panel; A heat dissipation layer is disposed on one side of the display panel. The heat dissipation layer includes a substrate, a driving electrode layer disposed on one side of the substrate, and a coolant layer disposed on the side of the driving electrode layer away from the substrate. The coolant layer is disposed between the display panel and the substrate, and the coolant layer has two immiscible fluids. The driving electrode layer is configured to drive the fluid flow.

[0005] Optionally, the display panel includes: Substrate; An array layer is disposed on one side of the substrate; A light-emitting layer is disposed on the side of the array layer away from the substrate; The coolant layer is located on one side of the light-emitting layer.

[0006] Optionally, the light-emitting surface of the light-emitting layer is located on the side of the light-emitting layer away from the substrate, and the coolant layer is located on the side of the light-emitting surface of the light-emitting layer.

[0007] Optionally, the driving electrode layer includes a first electrode layer and a second electrode layer arranged along the thickness direction of the display device, and the array layer includes at least one conductive layer; The first electrode layer is located between the substrate and the coolant layer, and the second electrode layer is disposed in the same layer as the conductive layer.

[0008] Optionally, the light-emitting surface of the light-emitting layer is located on the side of the light-emitting layer away from the substrate, and the coolant layer is located on the side of the substrate away from the light-emitting surface of the light-emitting layer.

[0009] Optionally, the driving electrode layer includes a first electrode layer and a second electrode layer arranged along the thickness direction of the display device; Wherein, the first electrode layer is located between the substrate and the coolant layer; the second electrode layer is located on the side of the substrate closer to the coolant layer, or the array layer includes at least one conductive layer, and the second electrode layer is disposed in the same layer as the conductive layer.

[0010] Optionally, the first electrode layer is a common electrode, and the second electrode layer includes a plurality of second electrodes, with adjacent second electrodes spaced apart.

[0011] Optionally, the display device has a display area, which includes a first area and a second area located between two adjacent first areas. The light transmittance of the first area is less than that of the second area. The light-emitting layer includes a plurality of light-emitting units, and the light-emitting units and the second electrode are both located in the first area.

[0012] Optionally, the heat dissipation layer further includes a first hydrophobic coating and / or a second hydrophobic coating, wherein the first hydrophobic coating is disposed on the side of the coolant layer near the first electrode layer, the first hydrophobic coating is in contact with the coolant layer, and the orthographic projection of the first hydrophobic coating on the light-emitting layer is located in the second region; The second hydrophobic coating is disposed on the side of the coolant layer near the second electrode layer, and the second hydrophobic coating is in contact with the coolant layer. The orthogonal projection of the second hydrophobic coating on the light-emitting layer is located in the second region.

[0013] Optionally, the coolant layer includes a first fluid and a second fluid, wherein the specific heat capacity of the first fluid is greater than that of the second fluid.

[0014] Optionally, the refractive index of the first fluid is greater than that of the second fluid, the first fluid is water and the second fluid is air; or, the first fluid is water containing particles or ions and the second fluid is silicone oil; or, the first fluid is water and the second fluid is a fluorinated liquid.

[0015] Optionally, the transmittance of the first fluid is greater than or equal to 90%, and the transmittance of the second fluid is greater than or equal to 80%.

[0016] In the display device of this application embodiment, a heat dissipation layer is provided on one side of the display panel. The heat dissipation layer is provided with a fluid and a driving electrode layer. The driving electrode layer can drive the fluid to flow, thereby removing heat and making the temperature of each area of ​​the display panel similar, reducing the display color deviation caused by temperature difference.

[0017] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0019] Figure 1 This is a top view of the display device provided in an exemplary embodiment of this disclosure; Figure 2 yes Figure 1 A schematic diagram of a cross-sectional structure at point CC; Figure 3 yes Figure 1 Another cross-sectional structural diagram at the CC position; Figure 4 yes Figure 1 Another cross-sectional structural diagram at the CC section; Figure 5 yes Figure 2 A schematic diagram of a partially enlarged structure; Figure 6 yes Figure 1 A diagram illustrating the working principle of the heat dissipation layer in the display device. Figure 7 yes Figure 2 Another locally enlarged structural diagram; Figure 8 yes Figure 2 Another locally enlarged structural diagram.

[0020] Explanation of reference numerals in the attached figures: 10 - Display device; AA - Display area; A1 - First area; A2 - Second area; NA - Non-display area; 1-Display panel; 11-Substrate; 12-Array layer; 120-Conductive layer; 121-Thin film transistor; 1211-Gate; 1212-Source; 1213-Drain; 1214-Active part; 13-Emitting layer; 13a-Emitting surface; 131-Emitting unit; 14-Encapsulation layer; 15 - Adhesive layer; 16-Cover plate; 2- Heat dissipation layer; 21-Substrate; 22-Drive electrode layer; 221-First electrode layer; 222-Second electrode layer; 23-Coolant layer; 231-First fluid; 231a, 231b, 231c, 231d, 231e-Droplets; 232-Second fluid; 2321-Scattered particles; 233-Frame adhesive; 241 - First hydrophobic coating; 242 - Second hydrophobic coating. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0022] This application provides a display device 10, such as... Figures 1 to 8 As shown, the device includes a display panel 1 and a heat dissipation layer 2. The heat dissipation layer 2 is disposed on one side of the display panel 1. The heat dissipation layer 2 includes a substrate 21, a driving electrode layer 22 disposed on one side of the substrate 21, and a coolant layer 23 disposed on the side of the driving electrode layer 22 away from the substrate 21. The coolant layer 23 is disposed between the display panel 1 and the substrate 21. The coolant layer 23 has two immiscible fluids. The driving electrode layer 22 is configured to drive the fluid flow.

[0023] The display device 10 can be a transparent display product. A transparent display product will not obstruct objects behind the display device 10, and can achieve virtual-real fusion. It can be applied to scenarios such as smart windows, interactive display cases, and smart homes.

[0024] Display panel 1 can be a Mini-LED panel, Micro-LED panel, etc. A Mini-LED panel includes multiple light-emitting Mini-LED chips, and a Micro-LED panel includes multiple light-emitting Micro-LED chips.

[0025] A heat dissipation layer 2 is disposed on one side of the display panel 1 to dissipate heat from the display panel 1 and prevent local areas of the display panel 1 from overheating due to the display. Inconsistent temperatures will cause different junction temperatures of the Mini-LED chips or Micro-LED chips, which will affect the light emission color of the chips and cause color deviation in the display.

[0026] In some embodiments, the substrate 21 may be a transparent material, such as glass, polyimide (PI), polycarbonate (PC), polynorbornene (PNB), and polyethylene terephthalate (PET).

[0027] like Figure 2 As shown, the driving electrode layer 22 is disposed on one side of the substrate 21. The driving electrode layer 22 can form an electric field, which can control the fluid flow in the coolant layer 23. The heat dissipation layer 2 adopts liquid cooling, which can significantly improve the heat dissipation capacity of the display device 10, while having little impact on the light transmittance of the transparent display device 10.

[0028] In some embodiments, the driving electrode layer 22 is a transparent conductive material, such as ITO (indium tin oxide), IZO (indium zinc oxide), IZTO (indium zinc tin oxide), etc.

[0029] In some embodiments, such as Figure 2 and Figure 3 As shown, the driving electrode layer 22 can be disposed on the same side of the coolant layer 23, that is, the driving electrode layer 22 includes multiple electrodes disposed in the same layer, and the multiple electrodes are used to drive the fluid flow in the coolant layer 23.

[0030] In other embodiments, such as Figure 4 As shown, the driving electrode layer 22 can be disposed on both sides of the coolant layer 23, that is, the driving electrode layer 22 includes two opposing and spaced electrodes, which are used to drive the fluid flow in the coolant layer 23.

[0031] like Figure 7 and Figure 8 As shown, the coolant layer 23 contains two immiscible fluids. The two immiscible fluids can naturally form a stable interface (such as an oil-water interface), and the fluids can form a "droplet" shape without the need for a complex interlayer structure.

[0032] In some embodiments, the fluid is a transparent material, thereby preventing the fluid from blocking light and affecting the transparent display function of the display device 10.

[0033] In some embodiments, such as Figures 2 to 4 As shown, the heat dissipation layer 2 also includes a frame adhesive 233, which is disposed around the fluid to seal it. The frame adhesive 233 can be located between the substrate 21 and the display panel 1. The side surface of the frame adhesive 233 closest to the substrate 21 is bonded to the substrate 21, and the side surface of the frame adhesive 233 closest to the display panel 1 is bonded to the display panel 1. The frame adhesive 233, the substrate 21, and the display panel 1 form a sealed cavity, and the fluid is located inside the cavity.

[0034] In some embodiments, the coolant layer 23 can be formed by a frame bonding method. A fluid can be applied to the surface of the display panel 1 to form a frame adhesive 233 on the surface of the display panel 1 or the substrate 21, thereby bonding the display panel 1 to the substrate 21 using the frame adhesive 233. Then, another fluid is injected into the cavity through an opening in the frame adhesive 233. After injection, the opening of the frame adhesive 233 is sealed.

[0035] In the embodiments of this application, the dielectric wetting effect is utilized to apply a voltage to the driving electrode layer 22, changing the wettability between the surface of the driving electrode layer 22 and the fluid droplets, i.e., reducing the contact angle of the droplets and causing them to spread. By activating the electric field in different regions of the driving electrode layer 22 in a specific time sequence, a surface tension gradient is generated in the droplets, thereby pulling the droplets to move in the desired direction. In other scenarios, the droplets can also be anchored at a specific position by continuously activating a specific region of the driving electrode layer 22, preventing them from moving randomly.

[0036] In the display device 10 of this application embodiment, a heat dissipation layer 2 is provided on one side of the display panel 1. The heat dissipation layer 2 is provided with a fluid and a driving electrode layer 22. The driving electrode layer 22 can drive the fluid to flow, thereby removing heat and making the temperature of each area of ​​the display panel 1 similar, reducing the display color deviation caused by temperature difference.

[0037] Optionally, such as Figure 2 As shown, the display panel 1 includes a substrate 11, an array layer 12 and a light-emitting layer 13. The array layer 12 is disposed on one side of the substrate 11; the light-emitting layer 13 is disposed on the side of the array layer 12 away from the substrate 11; wherein, the coolant layer 23 is located on one side of the light-emitting layer 13.

[0038] In some embodiments, the substrate 11 may be a transparent material, such as glass, polyimide (PI), polycarbonate (PC), polynorbornene (PNB), and polyethylene terephthalate (PET).

[0039] like Figure 5 As shown, the array layer 12 is provided with a driving circuit, which includes a thin-film transistor 121, capacitors, wiring, etc. The driving electrode is used to drive the light-emitting layer 13 to emit light. The thin-film transistor 121 includes a gate 1211, a source 1212, a drain 1213, and an active part 1214. The drain 1213 can be electrically connected to the light-emitting layer 13, thereby providing a driving signal to the light-emitting layer 13.

[0040] In some embodiments, the gate 1211, source 1212, and drain 1213 are made of conductive materials, such as any one of molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodymium (Nd), and copper (Cu) or alloys thereof.

[0041] In some embodiments, the active part 1214 is made of semiconductor, such as monocrystalline silicon, polycrystalline silicon, metal oxide, etc.

[0042] In some embodiments, the light-emitting layer 13 is used to realize a display. The light-emitting surface 13a of the light-emitting layer 13, that is, the side surface facing the viewer, is used to display the image.

[0043] like Figure 2 As shown, the coolant layer 23 can be located on the light-emitting surface 13a side of the light-emitting layer 13. The material of the coolant layer 23 can be a transparent fluid, thereby preventing the coolant layer 23 from blocking the light of the light-emitting layer 13.

[0044] In some embodiments, the fluid may include water and air. Water droplets flow under the drive of the driving electrode layer 22, thereby achieving heat dissipation.

[0045] In some embodiments, such as Figure 2 As shown, the display device 10 also includes an encapsulation layer 14, which is disposed on the side of the light-emitting layer 13 away from the substrate 11. The encapsulation layer 14 is used to protect the light-emitting layer 13 and prevent moisture or other substances from entering the light-emitting layer 13. The material of the encapsulation layer 14 can be resin, silicone, etc., but is not limited to these.

[0046] Optionally, combined Figure 2 and Figure 5 The driving electrode layer 22 includes a first electrode layer 221 and a second electrode layer 222 arranged along the thickness direction of the display device 10, and the array layer 12 includes at least one conductive layer 120; wherein, the first electrode layer 221 is located between the substrate 21 and the coolant layer 23, and the second electrode layer 222 is disposed in the same layer as the conductive layer 120.

[0047] Combination Figure 2 and Figure 5 The driving electrode layer 22 includes a first electrode layer 221 and a second electrode layer 222, which are arranged opposite to and spaced apart. The first electrode layer 221 is located on one side of the coolant layer 23, and the second electrode layer 222 is located on the other side of the coolant layer 23. By setting the driving electrode layer 22 as two electrodes arranged in different layers, it is more conducive to driving the fluid flow in the coolant layer 23.

[0048] In some embodiments, such as Figure 2 As shown, the first electrode layer 221 is located between the substrate 21 and the coolant layer 23. For example, the first electrode layer 221 can be formed directly on the substrate 21. The substrate 21 can be reused as a cover plate 16 to protect the display panel 1.

[0049] In some embodiments, such as Figure 5As shown, the second electrode layer 222 is located in the array layer 12, and the second electrode layer 222 can be disposed in the same layer as the conductive layer 120 in the array layer 12. With the above arrangement, the second electrode layer 222 and the conductive layer can be fabricated using the same patterning process, thereby simplifying the manufacturing process of the display device 10.

[0050] It should be noted that the conductive layer 120 can be any one of the gate 1211, source 1212, and drain 1213 of the thin-film transistor 121. Figure 5 The image shows the second electrode layer 222 being on the same layer as the drain electrode 1213.

[0051] In some embodiments, the display panel 1 further includes a cover plate 16 disposed on the side of the light-emitting layer 13 away from the substrate 11. The cover plate 16 can be made of polyimide, polyethylene terephthalate, glass, etc. The cover plate 16 can protect the film layers such as the light-emitting layer 13, improving the impact resistance of the screen of the display panel 1. The substrate 21 can be reused as the cover plate 16, thereby reducing the thickness of the display device 10.

[0052] Optionally, such as Figure 3 and Figure 4 As shown, Figure 3 and Figure 4 The embodiments and Figure 2 The difference in the embodiments lies in the position of the heat dissipation layer 2 and the cover plate 16. The display panel 1 includes a substrate 11, an array layer 12 and a light-emitting layer 13. The array layer 12 is disposed on one side of the substrate 11; the light-emitting layer 13 is disposed on the side of the array layer 12 away from the substrate 11, and the light-emitting surface 13a of the light-emitting layer 13 is located on the side of the light-emitting layer 13 away from the substrate 11; wherein, the coolant layer 23 is located on the side of the substrate 11 away from the light-emitting surface 13a of the light-emitting layer 13.

[0053] In some embodiments, such as Figure 3 and Figure 4 As shown, the coolant layer 23 can be disposed on the side of the substrate 11 away from the light-emitting surface 13a of the light-emitting layer 13, that is, the coolant layer 23 is disposed on the side of the non-light-emitting surface 13a of the light-emitting layer 13. With the above arrangement, the flow of the coolant layer 23 can be prevented from affecting the display effect.

[0054] In some embodiments, such as Figure 3 and Figure 4 As shown, the display panel 1 also includes a cover plate 16, which is disposed on the side of the light-emitting layer 13 away from the substrate 11. The cover plate 16 can be made of polyimide, polyethylene terephthalate, glass, etc. The cover plate 16 can protect the film layers such as the light-emitting layer 13, thereby improving the impact resistance of the screen of the display panel 1.

[0055] The display panel 1 also includes an adhesive layer 15, which can be made of materials such as optical adhesive. The optical adhesive is used to bond the cover plate 16.

[0056] Optionally, combined Figure 3 and Figure 5 The driving electrode layer 22 includes a first electrode layer 221 and a second electrode layer 222 arranged along the thickness direction of the display device 10; wherein the first electrode layer 221 is located between the substrate 21 and the coolant layer 23; the second electrode layer 222 is located on the side of the substrate 11 near the coolant layer 23, or the array layer 12 includes at least one conductive layer 120, and the second electrode layer 222 is disposed in the same layer as the conductive layer 120.

[0057] In some embodiments, combined with Figure 3 and Figure 5 The first electrode layer 221 is located between the substrate 21 and the coolant layer 23. The array layer 12 includes at least one conductive layer 120, and the second electrode layer 222 is disposed on the same layer as the conductive layer 120. With the above arrangement, the second electrode layer 222 and the conductive layer 120 can be fabricated using the same patterning process, thereby simplifying the manufacturing process of the display device 10.

[0058] In some embodiments, such as Figure 4 As shown, the first electrode layer 221 is located between the substrate 21 and the coolant layer 23, and the second electrode layer 222 is located on the side of the substrate 11 closer to the coolant layer 23. With this configuration, the second electrode layer 222 can be directly formed on the surface of the substrate 11 away from the array layer 12, thereby avoiding the second electrode layer 222 occupying the wiring space of the array layer 12. Simultaneously, it can reduce the capacitive coupling between the second electrode layer 222 and the conductive layer 120 in the array layer 12, reducing the interference of the second electrode layer 222 on the signals of the driving circuit in the array layer 12.

[0059] Optionally, the first electrode layer 221 is a common electrode, and the second electrode layer 222 includes a plurality of second electrodes, with adjacent second electrodes spaced apart.

[0060] In some embodiments, the first electrode layer 221 is a common electrode, and the first electrode layer 221 can be an entire layer to provide a common voltage for each area in the heat dissipation layer 2.

[0061] The second electrode layer 222 includes multiple second electrodes, with adjacent second electrodes spaced apart. This means that the multiple second electrodes can provide different driving voltages as needed, thereby independently controlling the fluid in the coolant layer 23 in each region. For example, fluid flow can be selectively implemented in corresponding regions based on the display status of the light-emitting layer 13.

[0062] Specifically, the display device 10 can share the current and position information of the pixel illumination area between the heat dissipation layer 2 and the array layer 12. In the area where the current density in the array layer 12 exceeds the safe value, a voltage is applied to the second electrode layer 222 to control the voltage of the second electrode in the corresponding temperature rise area to change according to a specific time sequence, so that the fluid in the coolant layer 23 moves and carries away the heat of the temperature rise area.

[0063] like Figure 6 The diagram shown illustrates the working principle of heat dissipation layer 2.

[0064] like Figure 6 As shown in (a), at the first moment, the middle light-emitting unit 131 emits light, while the left and right light-emitting units 131 do not emit light. The fluid in the coolant layer 23 comprises multiple droplets. Due to the heat generated by the light emission of the middle light-emitting unit 131, the droplet 231b corresponding to the middle light-emitting unit 131 is heated. This causes the second electrode layer 222 corresponding to the middle and right light-emitting units 131 to become conductive, thereby creating an electric field in the driving electrode layer 22.

[0065] like Figure 6 As shown in (b), at the second moment, the driving electrode layer 22 drives droplet 231b to move to the corresponding right-hand light-emitting unit 131, and the driving electrode layer 22 drives droplet 231a to move to the corresponding middle light-emitting unit 131. Since the light-emitting unit 131 corresponding to droplet 231a does not emit light at the first moment, the temperature of droplet 231a is lower than that of droplet 231b, thus the heat of the middle light-emitting unit 131 can be reduced by droplet 231a. If the middle light-emitting unit 131 continues to emit light, droplets from other non-light-emitting areas can be cyclically transferred to the middle light-emitting unit 131, and the heat of the light-emitting unit 131 can be carried away by the continuous high-frequency droplet movement.

[0066] The second electrode layer 222 corresponding to the light-emitting unit 131 on the left and the light-emitting unit 131 in the middle is turned on, so that the driving electrode layer 22 forms an electric field.

[0067] like Figure 6 As shown in (c), at the third moment, the driving electrode layer 22 drives droplet 231a to move to the corresponding right-hand light-emitting unit 131, the driving electrode layer 22 drives droplet 231d to move to the corresponding middle light-emitting unit 131, and the driving electrode layer 22 drives droplets 231e from other areas to move to the corresponding left-hand light-emitting unit 131. The middle light-emitting unit 131 does not emit light, and droplet 231d cools down, allowing it to move to other heat-generating light-emitting units 131 for heat dissipation.

[0068] The processes in (a), (b), and (c) can be repeated to continuously remove the heat from the light-emitting unit 131, thereby making the temperatures of different areas of the display panel 1 similar and improving the color shift of the light-emitting unit 131 caused by temperature inconsistency.

[0069] Optionally, such as Figure 1 and Figure 2 As shown, the display device 10 has a display area AA, which includes a first area A1 and a second area A2 located between two adjacent first areas A1. The light transmittance of the first area A1 is less than that of the second area A2. The light-emitting layer 13 includes a plurality of light-emitting units 131, and the light-emitting units 131 and the second electrode are both located in the first area A1.

[0070] In a Mini-LED panel, the light-emitting unit 131 can be a Mini-LED. In a Micro-LED panel, the light-emitting unit 131 can be a Micro-LED.

[0071] like Figure 1 As shown, the display area AA is used to display images, and the light-emitting unit 131 is located within the display area AA. The display device 10 also has a non-display area NA, which is located on one side of the display area AA.

[0072] like Figure 2 As shown, the display device 10 is a transparent display device, and the light transmittance of the first region A1 is less than that of the second region A2. The light-emitting unit 131 and the thin-film transistor 121 can be disposed in the first region A1. The light-emitting unit 131 and the thin-film transistor 121 are not disposed in the second region A2. Therefore, the second region A2 has a higher light transmittance than the first region A1, achieving a transparent display.

[0073] In some embodiments, the second electrode may be disposed in the first region A1, thereby avoiding a decrease in the transmittance of the second region A2 due to the second electrode being disposed in the second region A2.

[0074] It should be understood that in some other embodiments, the second electrode can be a transparent electrode, in which case the second electrode can be disposed in the second region A2.

[0075] Optionally, such as Figures 2 to 4 As shown, the heat dissipation layer 2 further includes a first hydrophobic coating 241 and / or a second hydrophobic coating 242. The first hydrophobic coating 241 is disposed on the side of the coolant layer 23 near the first electrode layer 221, and the first hydrophobic coating 241 is in contact with the coolant layer 23. The orthographic projection of the first hydrophobic coating 241 on the light-emitting layer 13 is located in the second region A2. The second hydrophobic coating 242 is disposed on the side of the coolant layer 23 near the second electrode layer 222, and the second hydrophobic coating 242 is in contact with the coolant layer 23. The orthographic projection of the second hydrophobic coating 242 on the light-emitting layer 13 is located in the second region A2.

[0076] In some embodiments, a hydrophobic coating may be provided on the surface of the film layer in contact with the coolant layer 23. The hydrophobic coating can reduce the resistance of the fluid in the coolant layer 23 during movement, thereby reducing the voltage in the drive electrode layer 22 and reducing the power consumption of the display device 10.

[0077] In some embodiments, such as Figures 2 to 4 As shown, the orthographic projection of the first hydrophobic coating 241 on the light-emitting layer 13 is located in the second region A2, and the orthographic projection of the second hydrophobic coating 242 on the light-emitting layer 13 is located in the second region A2. This means that the first hydrophobic coating 241 and the second hydrophobic coating 242 can be set only for the second region A2, and not for the first region A1.

[0078] In some embodiments, the fluid includes water and air. Because the hydrophobic coating repels water and fluids of similar polarity, but not non-polar fluids such as oil and organic solvents, the hydrophobic coating is positioned corresponding to the second region A2. This prevents water from remaining in the area corresponding to the second region A2, thus allowing water droplets to remain in the first region A1 as much as possible, thereby better cooling the light-emitting unit 131 in the first region A1. Without the hydrophobic coating, water droplets may remain in the second region A2, increasing the distance between the water droplets and the light-emitting unit 131 and reducing the cooling effect.

[0079] Optionally, such as Figure 7 and Figure 8 As shown, the coolant layer 23 includes a first fluid 231 and a second fluid 232, wherein the specific heat capacity of the first fluid 231 is greater than that of the second fluid 232.

[0080] The specific heat capacity of the first fluid 231 is greater than that of the second fluid 232. The first fluid 231 can be a coolant, and the second fluid 232 can be a filling fluid.

[0081] In some embodiments, the first fluid 231 may be water, and the second fluid 232 may be air.

[0082] In other embodiments, the first fluid 231 can be water, and the second fluid 232 can be silicone oil. Silicone oil can not only make water form droplets, but also seal the water to prevent it from evaporating and dissipating.

[0083] It should be noted that when the heat dissipation layer 2 also includes a first hydrophobic coating 241 or a second hydrophobic coating 242, the hydrophobic coating more strongly repels the first fluid 231 than the second fluid 232, thus allowing the first fluid 231 to remain better in the first region A1 and the second fluid 232 to remain as much as possible in the second region A2. This allows the first fluid 231 to act as a coolant for cooling, and the second fluid 232 to act as a filler fluid.

[0084] Optionally, such as Figure 7 and Figure 8 As shown, the refractive index of the first fluid 231 is greater than that of the second fluid 232. The first fluid 231 is water and the second fluid 232 is air; or, the first fluid 231 is water containing particles or ions and the second fluid 232 is silicone oil; or, the first fluid 231 is water and the second fluid 232 is fluorinated liquid.

[0085] like Figure 7 As shown, the refractive index of the first fluid 231 is greater than that of the second fluid 232. When light is emitted from the light-emitting unit 131, some of the light can be reflected by total internal reflection at the interface between the first fluid 231 and the second fluid 232, thereby focusing the light above the light-emitting unit 131 and improving the display brightness.

[0086] In some embodiments, the first fluid 231 is water and the second fluid 232 is air.

[0087] In some embodiments, the first fluid 231 is water containing particles, and the second fluid 232 is silicone oil. The particles can be nanoparticles.

[0088] In some embodiments, the first fluid 231 is water containing phosphorus ions and / or iodine ions, and the second fluid 232 is silicone oil.

[0089] In some embodiments, such as Figure 8 As shown, the second fluid 232 contains scattering particles 2321, which can be particles such as titanium dioxide (TiO2). The scattering particles 2321 can be nanoparticles. By setting the scattering particles 2321 in the second fluid 232, the large-angle light emitted outside the cooling droplet can be dispersed, preventing crosstalk between adjacent light-emitting units 131.

[0090] In some embodiments, the first fluid 231 is water, and the second fluid 232 is a fluorinated liquid. The water can be deionized water, or deionized water containing surfactants, etc.

[0091] Optionally, the transmittance of the first fluid 231 is greater than or equal to 90%, and the transmittance of the second fluid 232 is greater than or equal to 80%.

[0092] In some embodiments, the transmittance of the first fluid 231 is greater than or equal to 90%. With the above configuration, when the coolant layer 23 is located on the light-emitting surface 13a side of the light-emitting layer 13, the influence of the first fluid 231 on the brightness of the display device 10 can be reduced. For example, the transmittance of the first fluid 231 can be 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, etc.

[0093] In some embodiments, the transmittance of the second fluid 232 is greater than or equal to 80%. With the above configuration, when the display device 10 is a transparent display product, the overall transmittance of the display device 10 can be guaranteed to be greater than 70%. For example, the transmittance of the second fluid 232 can be 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, etc.

[0094] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0095] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0096] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0097] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A display device, characterized in that, include: Display panel; A heat dissipation layer is disposed on one side of the display panel. The heat dissipation layer includes a substrate, a driving electrode layer disposed on one side of the substrate, and a coolant layer disposed on the side of the driving electrode layer away from the substrate. The coolant layer is disposed between the display panel and the substrate, and the coolant layer has two immiscible fluids. The driving electrode layer is configured to drive the fluid flow.

2. The display device according to claim 1, characterized in that, The display panel includes: Substrate; An array layer is disposed on one side of the substrate; A light-emitting layer is disposed on the side of the array layer away from the substrate; The coolant layer is located on one side of the light-emitting layer.

3. The display device according to claim 2, characterized in that, The light-emitting surface of the light-emitting layer is located on the side of the light-emitting layer away from the substrate, and the coolant layer is located on the side of the light-emitting surface of the light-emitting layer.

4. The display device according to claim 3, characterized in that, The driving electrode layer includes a first electrode layer and a second electrode layer arranged along the thickness direction of the display device, and the array layer includes at least one conductive layer. The first electrode layer is located between the substrate and the coolant layer, and the second electrode layer is disposed in the same layer as the conductive layer.

5. The display device according to claim 2, characterized in that, The light-emitting surface of the light-emitting layer is located on the side of the light-emitting layer away from the substrate, and the coolant layer is located on the side of the substrate away from the light-emitting surface of the light-emitting layer.

6. The display device according to claim 5, characterized in that, The driving electrode layer includes a first electrode layer and a second electrode layer arranged along the thickness direction of the display device; Wherein, the first electrode layer is located between the substrate and the coolant layer; the second electrode layer is located on the side of the substrate closer to the coolant layer, or the array layer includes at least one conductive layer, and the second electrode layer is disposed in the same layer as the conductive layer.

7. The display device according to claim 4, characterized in that, The first electrode layer is a common electrode, and the second electrode layer includes a plurality of second electrodes, with adjacent second electrodes spaced apart.

8. The display device according to claim 7, characterized in that, The display device has a display area, which includes a first area and a second area located between two adjacent first areas. The light transmittance of the first area is less than that of the second area. The light-emitting layer includes a plurality of light-emitting units, and the light-emitting units and the second electrode are both located in the first area.

9. The display device according to claim 8, characterized in that, The heat dissipation layer further includes a first hydrophobic coating and / or a second hydrophobic coating. The first hydrophobic coating is disposed on the side of the coolant layer near the first electrode layer. The first hydrophobic coating is in contact with the coolant layer. The orthographic projection of the first hydrophobic coating on the light-emitting layer is located in the second region. The second hydrophobic coating is disposed on the side of the coolant layer near the second electrode layer, and the second hydrophobic coating is in contact with the coolant layer. The orthogonal projection of the second hydrophobic coating on the light-emitting layer is located in the second region.

10. The display device according to any one of claims 1 to 9, characterized in that, The coolant layer includes a first fluid and a second fluid, wherein the specific heat capacity of the first fluid is greater than that of the second fluid.

11. The display device according to claim 10, characterized in that, The refractive index of the first fluid is greater than that of the second fluid, and the first fluid is water and the second fluid is air; or, the first fluid is water containing particles or ions and the second fluid is silicone oil; or, the first fluid is water and the second fluid is a fluorinated liquid.

12. The display device according to claim 10, characterized in that, The transmittance of the first fluid is greater than or equal to 90%, and the transmittance of the second fluid is greater than or equal to 80%.

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