Display device

Abstract

The present application discloses a display device, which includes a light-emitting device and a micro heat sink. The light-emitting device and the micro heat sink are arranged in different layers. The micro heat sink includes a driving structure and a rotating structure. The rotating structure includes a rotating shaft and at least two rotating blades, and at least one of the rotating blades is arranged obliquely with respect to the rotating shaft; wherein the driving structure drives the rotating blades of the rotating structure to rotate to dissipate heat from the light-emitting device. The present application sets a micro heat sink for the light-emitting device. By rotating the rotating blades of the rotating structure of the micro heat sink, the heat loss of the light-emitting device is accelerated, the temperature is reduced, and the service life of the light-emitting device is prevented from being affected by excessive temperature.

Description

Technical Field

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

[0002] LED electronic display is a display screen that displays various information such as text, graphics, images, animations, etc. by controlling the display mode of semiconductor light-emitting diodes. The technological progress of LED is the biggest driving force for expanding market demand and application. As the most advantageous new generation display media, LED displays have been widely used in large squares, commercial advertisements, information dissemination, etc., and can meet the needs of different environments.

[0003] Since LED semiconductor devices have high thermal power consumption, they will generate a lot of heat during operation. The heat dissipation performance determines the quality and life of an LED lamp. When the temperature of the LED component rises by 2°C, the reliability decreases by 10%. If the heat cannot be dissipated in time, it will easily cause the display temperature to be too high, thus affecting the service life of the LED electronic display. Regardless of whether it is an LED display panel or other display panels, if the heat generated by the light-emitting device during long-term operation cannot be dispersed in time, it will directly affect the service life of the light-emitting device and cause various display problems to the display device. Summary of the invention

[0004] The purpose of the present application is to provide a display device that can dissipate heat from a light-emitting device in real time and increase the service life of the light-emitting device.

[0005] The present application discloses a display device, comprising a light-emitting device and a micro heat-dissipating device, wherein the light-emitting device and the micro heat-dissipating device are arranged in different layers, and the micro heat-dissipating device comprises a driving structure and a rotating structure, and the rotating structure comprises a rotating shaft and at least two rotating blades, and at least one of the rotating blades is arranged to be inclined with respect to the rotating shaft; wherein the driving structure drives the rotating blades of the rotating structure to rotate so as to dissipate heat from the light-emitting device.

[0006] Optionally, the display device includes an LED display panel and a backlight module, the light-emitting device includes lamp beads, and the backlight module includes a lamp board. The lamp beads are arranged in an array shape on the lamp board, and the micro heat sink is arranged on a surface of the light board away from the lamp beads. Each micro heat sink corresponds to one lamp bead, and along the light-emitting surface direction of the lamp bead, the projection surface of the rotating structure covers the projection surface of the lamp bead.

[0007] Optionally, the display device includes an LED display panel and a backlight module, the light-emitting device includes lamp beads, the backlight module includes a lamp board, the lamp beads are arranged in an array shape on the lamp board, the micro heat sink is arranged on the light-emitting surface of the lamp beads, and each of the micro heat sinks corresponds to at least one lamp bead.

[0008] Optionally, the display device includes an OLED display panel and a drive array, the light-emitting device includes an organic light-emitting layer, the OLED display panel includes an anode, a cathode, and the organic light-emitting layer arranged between the anode and the cathode, the drive array is arranged on a side of the anode away from the cathode, a glass substrate is provided on a side of the drive array away from the organic light-emitting layer, and the micro heat dissipation device is arranged between the drive array and the glass substrate.

[0009] Optionally, the rotating structure includes three rotating fan blades, and the three rotating fan blades are all arranged at an angle to the rotating shaft. The driving structure includes a driving wall and at least two driving electrodes, and the driving wall is transmission-connected to the rotating shaft. Different driving electrodes receive different voltages to generate electric fields of different sizes, so that the driving wall rotates to drive the rotating shaft to rotate.

[0010] Optionally, the rotating structure includes four transparent rotating blades, the four rotating blades include two first rotating blades and two second rotating blades that are symmetrically arranged, the first rotating blades and the second rotating blades are arranged at intervals, and a hollow portion is provided between adjacent first rotating blades and second rotating blades; the two first rotating blades are arranged obliquely with respect to the rotating axis, the two first rotating blades include a first plane and a first inclined surface, the first plane and the first inclined surface are integrally formed, and the angle between the first plane and the first inclined surface is a first preset angle; wherein the transmittance of the light emitted by the lamp bead is controlled by controlling the rotation of the micro heat sink.

[0011] Optionally, a micro heat sink is provided for each of the organic light-emitting layers, and the organic light-emitting layers include a red organic light-emitting layer, a green organic light-emitting layer and a blue organic light-emitting layer, and the rotation speed of the rotating blades of the micro heat sink corresponding to the blue organic light-emitting layer is greater than the rotation speed of the rotating blades of the micro heat sink corresponding to the red organic light-emitting layer or the green organic light-emitting layer.

[0012] Optionally, along the light-emitting surface, the projection surface of the hollow portion is larger than the sum of the projection surfaces of the first rotating blade and the second rotating blade, the first plane of the first rotating blade and the surface of the second rotating blade close to the light-emitting surface are both provided with a reflective layer, and the light board is a transparent light board; the driving structure includes a driving wall and at least two driving electrodes, the driving wall is transmission-connected to the rotating shaft, different driving electrodes receive different voltages to generate electric fields of different sizes to cause the driving wall to rotate to drive the rotating shaft to rotate; wherein an electric field is generated between the two driving electrodes to cause the driving wall to rotate, thereby driving the micro heat sink to rotate, and when the hollow portion of the micro heat sink rotates to directly above the lamp bead, the display device displays the front picture; when the first rotating blade or the second rotating blade of the micro heat sink rotates to directly above the lamp bead, the display device displays the back picture.

[0013] Optionally, the display device includes a timing control module, which is electrically connected to the driving structure of the micro heat dissipation device; the timing control module outputs a corresponding electrical signal to the driving structure according to the grayscale value to control the rotating fan blades of the rotating structure to rotate at a corresponding rotation speed to dissipate heat for the light-emitting device.

[0014] Optionally, there are multiple light-emitting devices, and the multiple light-emitting devices are divided into multiple partitions. Each partition is provided with at least two light-emitting devices. Each of the two light-emitting devices is provided with at least one micro heat dissipation device. Each partition is provided with a temperature detection module. The temperature detection module is electrically connected to the driving structure. When the temperature detection module detects that the temperature in the corresponding partition exceeds a threshold temperature, the temperature detection module sends an electrical signal to the driving structure. The driving structure drives the rotating blades of the rotating structure to rotate to dissipate the heat of the light-emitting devices in the partition.

[0015] Compared with the existing display device with a heat dissipation channel, the present application sets a corresponding micro heat dissipation device for the light-emitting device, and accelerates the heat dissipation of the corresponding light-emitting device through the rotation of the rotating fan blades of the rotating structure of the micro heat dissipation device, thereby reducing the temperature of the light-emitting device. The light-emitting device can be dissipated in a targeted manner, and the corresponding micro heat dissipation device can be turned on where heat dissipation is needed. The heat dissipation is more precise, and the rotation speed of the rotating structure can also be adjusted and changed, so that the heat dissipation speed of the light-emitting device by the micro heat dissipation device can be controlled, and the light-emitting device can be dissipated efficiently and accurately, thereby preventing excessive temperature from affecting the service life of the light-emitting device, thereby increasing the service life of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0017] Figure 1 is a schematic structural diagram of a display device according to a first embodiment of the present application;

[0018] Figure 2 is a schematic structural diagram of a micro heat dissipation device according to a first embodiment of the present application;

[0019] Figure 3 is a schematic structural diagram of a display device according to a second embodiment of the present application;

[0020] Figure 4 is a schematic structural diagram of a micro heat dissipation device according to a second embodiment of the present application;

[0021] Figure 5 is a schematic structural diagram of a display device according to a third embodiment of the present application;

[0022] Figure 6 is a schematic structural diagram of a micro heat dissipation device according to a third embodiment of the present application;

[0023] Figure 7 is a three-dimensional diagram of the structure of a micro heat dissipation device according to a fourth embodiment of the present application;

[0024] Figure 8 is a schematic structural diagram of a display device (front display) according to a fourth embodiment of the present application;

[0025] Fig. 9 is a schematic structural diagram of a display device (back display) according to a fourth embodiment of the present application;

[0026] Fig.10 is a schematic structural diagram of a display device according to a fifth embodiment of the present application;

[0027] Fig.11 is a schematic structural diagram of a display device according to a sixth embodiment of the present application;

[0028] Fig.12 It is a schematic diagram of the structure of a display device of the seventh embodiment of the present application.

[0029] Among them, 100, display device; 110, light-emitting device; 111, lamp bead; 112, organic light-emitting layer; 120, micro heat dissipation device; 121, hollow part; 130, drive structure; 131, drive wall; 132, drive electrode; 140, rotating structure; 150, rotating axis; 160, rotating blade; 161, first rotating blade; 162, second rotating blade; 163, first inclined surface; 164, first plane; 165, reflective coating; 170, LED display panel; 180, backlight module; 181, lamp board; 190, OLED display panel; 191, anode; 192, cathode; 200, drive array; 210, glass substrate; 220, timing control module; 230, temperature detection module. DETAILED DESCRIPTION

[0030] It should be understood that the terms used herein, the specific structures and functional details disclosed are only for describing specific embodiments and are representative, but the present application can be implemented in many alternative forms and should not be construed as being limited to only the embodiments described herein.

[0031] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, features defined as "first" and "second" may explicitly or implicitly include one or more of the features; "plurality" means two or more. The term "including" and any variation thereof means non-exclusive inclusion, and one or more other features, integers, steps, operations, units, components and / or combinations thereof may exist or be added.

[0032] In addition, terms indicating orientation or positional relationships, such as “center,” “lateral,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inside,” and “outside,” are described based on the orientation or relative positional relationships shown in the accompanying drawings and are merely simplified descriptions for the convenience of describing the present application. They do not indicate that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limitations on the present application.

[0033] In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internally connected between two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] The present application is described in detail below with reference to the accompanying drawings and optional embodiments.

[0035] Embodiment 1:

[0036] refer to Figure 1 to Figure 2 As shown, as the first embodiment of the present application, a display device 100 is disclosed, wherein the display device 100 includes a light-emitting device 110 and a micro heat-dissipating device 120, wherein the light-emitting device 110 and the micro heat-dissipating device 120 are arranged at different layers, wherein the micro heat-dissipating device 120 includes a driving structure 130 and a rotating structure 140, wherein the rotating structure 140 includes a rotating shaft 150 and at least two rotating blades 160, and at least one of the rotating blades 160 is tilted relative to the rotating shaft 150; wherein the driving structure 130 drives the rotating blades 160 of the rotating structure 140 to rotate so as to dissipate heat from the light-emitting device 110.

[0037] A micro-rotating device with a fan-like structure, namely a micro-heat dissipation device 120, is printed out by using two-photon printing technology. A corresponding micro-heat dissipation device 120 is set for the light-emitting device 110. The rotating blades 160 of the rotating structure 140 of the micro-heat dissipation device 120 rotate to accelerate the heat dissipation of the corresponding light-emitting device 110, thereby reducing the temperature of the light-emitting device 110 or the related structure or film layer of the light-emitting device 110 or the accessories of the light-emitting device 110. The light-emitting device 110 can be dissipated in a targeted manner. The corresponding micro-heat dissipation device 120 can be turned on where heat dissipation is needed, and the heat dissipation is more accurate. The light-emitting device 110 that does not need heat dissipation can turn off the corresponding micro-heat dissipation device 120, avoiding all Turning on the light source wastes electricity, and targeted turning on or off can reduce power consumption. The rotation speed of the rotating structure 140 can also be adjusted. The light-emitting device 110 with a long working time and high temperature can have a faster rotating blade 160, which can blow away the heat faster. After the temperature of the light-emitting device 110 is lowered, the rotation speed of the rotating blade 160 can be reduced, that is, the rotation speed of the rotating structure 140 is continuously changed, so that the heat dissipation speed of the micro heat dissipation device 120 for the light-emitting device 110 can be controlled, and the light-emitting device 110 can be cooled efficiently and accurately, thereby preventing the service life of the light-emitting device 110 from being affected by excessively high temperature, so as to increase the service life of the display device 100.

[0038] Embodiment 2:

[0039] like Figure 3 to Figure 4As shown, as the second embodiment of the present application, it is a further refinement and improvement of the above-mentioned first embodiment. The display device 100 includes an LED display panel 170 and a backlight module 180. The light-emitting device 110 includes a lamp bead 111. The lamp bead 111 can be a mini-LED lamp bead 111 or a micro-LED lamp bead 111. The backlight module 180 includes a lamp board 181. The lamp bead 111 is arranged on the lamp board 181 in an array shape. The micro heat dissipation device 120 is arranged on a side of the lamp board 181 away from the lamp bead 111. Each The micro heat sink 120 is arranged corresponding to one of the lamp beads 111, and along the light-emitting surface direction of the lamp bead 111, the projection surface of the rotating structure 140 covers the projection surface of the lamp bead 111; a micro heat sink 120 is provided corresponding to each lamp bead 111, and the heat dissipation of each lamp bead 111 can be accurately controlled. The heat dissipation time can be increased for the lamp bead 111 with a longer light emission time and a relatively large heat generation, that is, the corresponding micro heat sink 120 is controlled to work longer, while the corresponding micro heat sink 120 for the lamp bead 111 with a short light emission time and a relatively small heat generation is controlled not to work.

[0040] Generally, the rotating structure 140 includes three rotating blades 160, and the three rotating blades 160 are all inclined to the rotating shaft 150. The driving structure 130 includes a driving wall 131 and at least two driving electrodes 132. The driving wall 131 is made of conductive material. The driving wall 131 is connected to the rotating shaft 150 in a transmission manner. Different driving electrodes 132 receive different voltages to generate electric fields of different sizes so that the driving wall 131 rotates to drive the rotating shaft 150 to rotate. The micro heat dissipation device 120 is combined with mini LED, micro LED and other display technologies, and the rotating structure 140 is rotated to achieve fixed-point heat dissipation of mini LED, etc.

[0041] In this embodiment, the rotating structure 140 is arranged on the back side of the lamp board 181 where the lamp bead 111 is located, and the lamp board 181 is first heat-dissipated so that the heat generated by the lamp bead 111 is absorbed by the lamp board 181 in the form of heat transfer, thereby realizing indirect heat dissipation; electrodes arranged in a clock shape are arranged on the lamp board 181, and the rotating structure 140 is driven to rotate by the charge attraction between the electrodes and the rotating structure 140 driving wall 131. Assuming that the driving wall 131 is negatively charged and the pair of electrodes facing it are positively charged, the rotating structure 140 stops in the horizontal direction at this time; the horizontal electrode is negatively charged and the adjacent electrode is positively charged, and an electric field is formed by the phase-leading electrodes to rotate the driving wall 131, thereby driving the micro heat dissipation device 120, and the rotation speed of the micro heat dissipation device 120 can be controlled by the size of the electrode power supply.

[0042] Embodiment 3:

[0043] refer to Figures 5 and 6 As shown, as the third embodiment of the present application, different from the above-mentioned second embodiment, the micro heat sink 120 is arranged on the light-emitting surface of the lamp bead 111, and each of the micro heat sinks 120 corresponds to at least one of the lamp beads 111. One micro heat sink 120 corresponds to one lamp bead 111, and dissipates heat corresponding to one lamp bead 111; or one micro heat sink 120 is arranged in the middle of two lamp beads 111 to dissipate heat for the two lamp beads 111.

[0044] Furthermore, the rotating structure 140 includes four transparent rotating blades 160, and the four rotating blades 160 include two first rotating blades 161 and two second rotating blades 162 which are symmetrically arranged. The first rotating blades 161 and the second rotating blades 162 are arranged at intervals, and a hollow portion 121 is provided between adjacent first rotating blades 161 and second rotating blades 162; the two first rotating blades 161 are arranged obliquely with respect to the rotating axis 150, and the two first rotating blades 161 include a first plane 164 and a first inclined surface 163, the first plane 164 and the first inclined surface 163 are integrally formed, and the angle between the first plane 164 and the first inclined surface 163 is a first preset angle, and the first preset angle is an in-plane angle, which is generally selected between 110° and 160°; wherein, the transmittance of the light emitted by the lamp bead 111 is controlled by controlling the rotation of the micro heat dissipation device 120.

[0045] In this embodiment, the micro heat sink 120 is used not only as a heat sink but also as a dimming device. The rotating blade 160 has two blades with different structures. The first rotating blade 161 is inclined, and the second rotating blade 162 is perpendicular to the rotating axis 150. When the light emitted by the lamp bead 111 passes through the first rotating blade 161, because the first rotating blade 161 is inclined, part of the light will be refracted multiple times, resulting in increased light loss; while the second rotating blade 162 is perpendicular to the rotating axis 150, the light emitted by the lamp bead 111 directly passes through the second rotating blade 162, that is, the light emitted by the lamp bead 111 and the second rotating blade 162 Vertically, the refractive index is different from that of the first rotating blade 161, and the hollow portion 121 between the first rotating blade 161 and the second rotating blade 162 has no obstruction, and the light emitted by the lamp bead 111 can pass directly through. Therefore, when the micro-rotating device rotates, the first rotating blade 161, the second rotating blade 162 and the hollow portion 121 are respectively located directly above the lamp bead 111, and the transmittance of the light emitted by the lamp bead 111 is different. When the display device 100 requires a high transmittance, the hollow portion of the micro-rotating device can be rotated to directly above the lamp bead 111 to meet the display requirements.

[0046] Embodiment 4:

[0047] like Figures 7 to 9 As shown, as the fourth embodiment of the present application, it is a further extension or expansion of the third embodiment. This embodiment adjusts the transmittance on the basis of heat dissipation and can also achieve double-sided display. Figures 4 to 7 As shown, along the light-emitting surface, the projection surface of the hollow portion 121 is larger than the sum of the projection surfaces of the first rotating blade 161 and the second rotating blade 162, the first plane 164 of the first rotating blade 161 and the surface of the second rotating blade 162 close to the light-emitting surface are both provided with a reflective layer, and the lamp board 181 is a transparent lamp board 181; the driving structure 130 includes a driving wall 131 and at least two driving electrodes 132, the driving wall 131 is transmission-connected to the rotating shaft 150, and different driving electrodes 132 receive different voltages to generate different magnitudes of electric currents. The field causes the driving wall 131 to rotate to drive the rotating shaft 150 to rotate; wherein, an electric field is generated between the two driving electrodes 132 to cause the driving wall 131 to rotate, thereby driving the micro heat dissipation device 120 to rotate, and when the hollow portion 121 of the micro heat dissipation device 120 rotates to directly above the lamp bead 111, the display device 100 displays the front image; when the first rotating fan blade 161 or the second rotating fan blade 162 of the micro heat dissipation device 120 rotates to directly above the lamp bead 111, the display device 100 displays the back image.

[0048] Specifically, the driving structure 130 and the rotating structure 140 of the micro heat sink 120 are integrally formed through two-photon 3D printing and other technologies. Charged particles are added during the preparation of the micro heat sink 120 to make the driving wall 131 have a certain electrical property. The driving wall 131 is used to drive the electric field force generated between the electrodes 132 to make the entire micro heat sink 120 rotate at any angle, and the positions of the first rotating blade 161 and the second rotating blade 162 are switched by continuously rotating in the clockwise or counterclockwise direction; the first rotating blade 161 and the second rotating blade 162 are provided with a reflective coating 165 on the side close to the lamp bead 111120, and the reflective coating 165 can reflect the light emitted by the lamp bead 111 back.

[0049] Furthermore, the display device 100 includes a refresh rate adjustment module, which is electrically connected to the drive electrode 132. The refresh rate adjustment module controls the rotation speed of the micro heat sink 120 by outputting voltages of different sizes to the drive electrode 132, thereby changing the refresh rate of the front display or the back display of the display device 100; the display panel displays different front images and back images through the rotation of the micro heat sink 120 and the brightness adjustment of the direct display light source; and the refresh frequency of the front image or the back image is determined by the rotation speed of the micro heat sink 120, and the faster the rotation speed, the higher the refresh rate; assuming that the rotation period of the micro heat sink 120 is T, and the angle (θ) and number (n) of the rotating platform occupied by the hollow portion 121 and the reflective portion of the micro-rotator platform are consistent, then the time of one frame is The time of one frame can be adjusted by the rotation speed of the rotating device.

[0050] Embodiment 5:

[0051] like Fig.10 As shown, as the fifth embodiment of the present application, different from the above-mentioned second embodiment, the display device 100 includes an OLED display panel 190 and a drive array 200, the light-emitting device 110 includes an organic light-emitting layer 112, the OLED display panel 190 includes an anode 191, a cathode 192 and the organic light-emitting layer 112 arranged between the anode 191 and the cathode 192, the drive array 200 is arranged on a side of the anode 191 away from the cathode 192, a glass substrate 210 is provided on a side of the drive array 200 away from the organic light-emitting layer 112, and the micro heat dissipation device 120 is arranged between the drive array 200 and the glass substrate 210.

[0052] The present embodiment is mainly aimed at an OLED display panel 190 with a top-emitting structure. When the organic light-emitting layer 112 is working for a long time, if the heat cannot be dissipated in time, the temperature will rise, thereby causing the light-emitting material in the organic light-emitting layer 112 to be easily aged, affecting the light-emitting efficiency. For the OLED display panel 190, a micro heat sink 120 is also provided for each organic light-emitting layer 112, and the heat sink is provided on the side of the drive array 200 away from the organic light-emitting layer 112. The heat sink is provided on the side of the drive array 200 away from the organic light-emitting layer 112 so as to dissipate the heat of the drive array 200 and absorb the heat of the organic light-emitting layer 112 by lowering the temperature of the metal wires in the drive array 200. The heat generated by 12 achieves the purpose of dissipating the heat of the organic light-emitting layer 112. Secondly, it will not affect the aperture ratio of the pixel. It is arranged on the backlight side instead of the light-emitting side to avoid the micro-heat dissipation device 120 blocking the light and affecting the aperture ratio. In addition, because the cathode 192 end is provided with a packaging layer, the packaging layer is not easy to absorb heat, and there can be no gap between the packaging layer and the cathode 192, so it is not considered to be arranged between the packaging layer and the organic light-emitting layer 112; of course, if it is a bottom-emitting OLED display panel 190, the micro-rotating device can be arranged outside the packaging layer, for example, a gap is left between the passivation layer outside the packaging layer and the packaging layer to place the micro-heat dissipation device 120 to achieve indirect heat dissipation of the organic light-emitting layer 112.

[0053] Furthermore, in order to make the heat dissipation more precise, a micro heat dissipation device 120 is provided for each of the organic light-emitting layers 112, and heat is only provided for the organic light-emitting layers 112 that need heat dissipation, while the organic light-emitting layers 112 that do not need heat dissipation are not provided. In this way, the operating temperature of the organic light-emitting layer 112 can be maintained within a certain range to prevent the temperature from being too low and affecting the luminous efficiency of the organic light-emitting layer 112. In addition, the organic light-emitting layer 112 generally includes at least three organic light-emitting layers 112 of different colors, namely a red organic light-emitting layer 112, a green organic light-emitting layer 112 and a blue organic light-emitting layer 112. Because blue light is easily attenuated and is more prone to aging problems under the influence of high temperature, faster heat dissipation is required for the blue organic light-emitting layer 112. Therefore, the rotation rate of the rotating blades 160 of the micro heat dissipation device 120 corresponding to the blue organic light-emitting layer 112 is greater than the rotation rate of the rotating blades 160 of the micro heat dissipation device 120 corresponding to the red organic light-emitting layer 112 or the green organic light-emitting layer 112.

[0054] Embodiment 6:

[0055] like Fig.11As shown, as the sixth embodiment of the present application, it is a further refinement of any of the above embodiments. This embodiment mainly highlights that the rotation speed of the rotating blades 160 is determined by the grayscale value. The display devices 100 in the above embodiments are all provided with a timing control module 220, and the timing control module 220 is electrically connected to the driving structure 130 of the micro heat dissipation device 120; the timing control module 220 outputs a corresponding electrical signal to the driving structure 130 according to the grayscale value to control the rotating blades 160 of the rotating structure 140 to rotate at the corresponding rotation speed to dissipate heat to the light-emitting device 110.

[0056] In the grayscale of 0-225, the grayscale values ​​at the two ends require a large voltage, so the working intensity is high, the power consumption is also high, and the heat generated is large. In order to better achieve heat dissipation, the speed of the rotating fan blade 160 is controlled by the grayscale value. When the display area of ​​the picture is closer to 255 grayscale, the lamp bead 111 or the organic light-emitting layer 112 under the corresponding display area requires a greater brightness, and the heat generated is greater. When the grayscale value is identified, after the lamp bead 111 has worked for a preset time, the micro heat sink 120 is turned on to dissipate the heat of the lamp bead 111. The preset time can be selected within 0-10s, of course, it can also be a longer time. The temperature can be predicted based on the total working time of the high grayscale value, so as to select the corresponding time to turn on the micro heat sink 120 to achieve heat dissipation.

[0057] Embodiment 7:

[0058] like Fig.12 As shown, as the seventh embodiment of the present application, it is a further refinement or extension of the schemes of the first to sixth embodiments. In any of the above embodiments, the light-emitting device 110 is provided with multiple, and the present embodiment divides the multiple light-emitting devices 110 into multiple partitions, each partition is provided with at least two light-emitting devices 110, and each of the two light-emitting devices 110 is provided with at least one micro heat dissipation device 120, and each partition is provided with a temperature detection module 230, and the temperature detection module 230 is electrically connected to the driving structure 130. When the temperature detection module 230 detects that the temperature in the corresponding partition exceeds the threshold temperature, it sends an electrical signal to the driving structure 130, and the driving structure 130 drives the rotating fan blades 160 of the rotating structure 140 to rotate to dissipate heat for the light-emitting devices 110 in the partition.

[0059] The micro heat sink 120 can work in conjunction with the temperature detection module 230 provided on the lamp board 181. The temperature detection module 230 on the lamp board 181 monitors the temperature of each partition of the mini LED backlight (preferably monitoring each lamp bead 111). The temperature detection module 230 sets one or more threshold temperatures. When it is detected that the temperature of one or more partitions exceeds the threshold temperature, the over-temperature signal is fed back to the control chip, so that the rotation speed of the micro heat sink 120 in the area where the temperature exceeds the threshold temperature is increased, thereby accelerating the heat dissipation of the over-temperature partition, reducing the temperature, making the temperature of the mini LED uniform, and preventing local temperature from being too high. The temperature detection module 230 can be composed of a temperature detection layer in the mini LED lamp board 181, which is composed of multiple thermistor thin film transistors (the current of the thermistor thin film transistor is small at low temperature and large at high temperature). The thermistor thin film transistor can monitor the temperature in the backlight, specifically monitor the temperature of each lamp bead 111 / partition. When the temperature of a lamp bead 111 / partition exceeds the temperature, the signal is amplified and fed back to the driver chip to control the rotation speed of the micro heat dissipation device 120. In addition, other partition temperature monitoring methods can also be used, and existing mature global temperature measurement devices can be used for reference.

[0060] It should be noted that the limitations on the various steps involved in this solution, without affecting the implementation of the specific solution, are not deemed to limit the order of the steps. The steps written in front can be executed first, or later, or even simultaneously. As long as this solution can be implemented, it should be deemed to fall within the scope of protection of this application.

[0061] It should be noted that the inventive concept of the present application can form a large number of embodiments, but the length of the application document is limited and it is impossible to list them one by one. Therefore, under the premise of no conflict, the embodiments or technical features described above can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effects will be enhanced.

[0062] The above content is a further detailed description of the present application in combination with specific optional implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, which should be deemed to fall within the scope of protection of the present application.

Claims

1. A display device, characterized in that: It comprises a light emitting device and a micro heat sink, wherein the light emitting device and the micro heat sink are arranged in different layers, the micro heat sink comprises a driving structure and a rotating structure, the rotating structure comprises a rotating shaft and at least two rotating blades, and at least one of the rotating blades is arranged obliquely with respect to the rotating shaft; Wherein, the driving structure drives the rotating blades of the rotating structure to rotate so as to dissipate heat from the light emitting device; The display device comprises an LED display panel and a backlight module, the light emitting device comprises lamp beads, the backlight module comprises a lamp board, the lamp beads are arranged on the lamp board in an array shape, the micro heat sink is arranged on the light emitting surface of the lamp beads, and each micro heat sink is arranged corresponding to at least one lamp bead; The rotating structure comprises four transparent rotating blades, the four rotating blades comprising two first rotating blades and two second rotating blades which are symmetrically arranged, the first rotating blades and the second rotating blades are arranged at intervals, and a hollow portion is provided between adjacent first rotating blades and second rotating blades; The two first rotating blades are arranged to be inclined with respect to the rotating shaft, and the two first rotating blades include a first plane and a first inclined surface, the first plane and the first inclined surface are integrally formed, and an angle between the first plane and the first inclined surface is a first preset angle; Wherein, the transmittance of the light emitted by the lamp bead is controlled by controlling the rotation of the micro heat sink; Along the light-emitting surface, the projection surface of the hollow portion is larger than the sum of the projection surfaces of the first rotating blade and the second rotating blade, a first plane of the first rotating blade and a surface of the second rotating blade close to the light-emitting surface are both provided with a reflective layer, and the light board is a transparent light board; the driving structure includes a driving wall and at least two driving electrodes, the driving wall is drivingly connected to the rotating shaft, and different driving electrodes receive different voltages to generate electric fields of different sizes so that the driving wall rotates to drive the rotating shaft to rotate; Among them, an electric field is generated between the two driving electrodes to cause the driving wall to rotate, thereby driving the micro heat sink to rotate. When the hollow portion of the micro heat sink rotates to directly above the lamp bead, the display device displays the front image; when the first rotating fan blade or the second rotating fan blade of the micro heat sink rotates to directly above the lamp bead, the display device displays the back image.

2. The display device according to claim 1, wherein: The display device includes an OLED display panel and a drive array, the light-emitting device includes an organic light-emitting layer, the OLED display panel includes an anode, a cathode, and the organic light-emitting layer arranged between the anode and the cathode, the drive array is arranged on a side of the anode away from the cathode, a glass substrate is provided on a side of the drive array away from the organic light-emitting layer, and the micro heat dissipation device is arranged between the drive array and the glass substrate.

3. The display device according to claim 2, wherein: A micro heat sink is provided corresponding to each of the organic light-emitting layers, and the organic light-emitting layers include a red organic light-emitting layer, a green organic light-emitting layer and a blue organic light-emitting layer. The rotation speed of the rotating blades of the micro heat sink corresponding to the blue organic light-emitting layer is greater than the rotation speed of the rotating blades of the micro heat sink corresponding to the red organic light-emitting layer or the green organic light-emitting layer.

4. The display device according to any one of claims 1 to 3, characterized in that: The display device comprises a timing control module, and the timing control module is electrically connected to the driving structure of the micro heat dissipation device; The timing control module outputs a corresponding electrical signal to the driving structure according to the grayscale value to control the rotating blades of the rotating structure to rotate at a corresponding rotation speed to dissipate heat for the light emitting device.

5. The display device according to any one of claims 1 to 3, characterized in that: There are multiple light-emitting devices, and the multiple light-emitting devices are divided into multiple partitions. Each partition is provided with at least two light-emitting devices, and each of the two light-emitting devices corresponds to at least one micro heat dissipation device. There is a temperature detection module in each partition, and the temperature detection module is electrically connected to the driving structure. When the temperature detection module detects that the temperature in the corresponding partition exceeds the threshold temperature, the temperature detection module sends an electrical signal to the driving structure, and the driving structure drives the rotating fan blades of the rotating structure to rotate to dissipate the heat of the light-emitting devices in the partition.

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