A High-Luminance, Energy-Efficient Large-Scale Display Unit featuring a Connected Thermal Management Structure

Abstract

In order to provide a structure capable of maintaining a uniform temperature between adjacent cabinets and efficiently controlling heat generation of the entire display device, a large display device having a connected heat dissipation structure according to an embodiment of the present invention, which saves energy and has high brightness, comprises a cabinet in which a plurality of light-emitting panels capable of outputting a video signal are installed by arranging a plurality of light-emitting elements, a plate and a substrate arranged to support the light-emitting panels installed within the cabinet, and a power module and an input / output module installed on the plate, wherein the display device comprises a ventilation opening installed on the side wall of the cabinet to discharge heat inside the cabinet to the outside, and a heat transfer line that effectively guides heat generated from the LEDs of the light-emitting panels toward the ventilation opening, wherein the ventilation opening is provided in the housing in the left and right directions as well as in the up and down direction to allow air to flow freely in the up, down, left, and right directions, including between adjacent cabinets, and the heat transfer line is composed of a thermally conductive material consisting of at least one of aluminum, copper, graphite or carbon composite, ceramic, nickel or titanium-based non-magnetic alloy, heat dissipation sheet, or paste.

Description

Technology Field

[0001] The present invention relates to a heat dissipation structure for a large display device, and more specifically, to a connected heat dissipation structure applied to a large display device in which a plurality of light-emitting panels, cabinets supporting them, and plates are combined. In particular, the present invention relates to a structure that includes ventilation holes formed in the side walls of each cabinet and heat transfer lines that guide heat generated from the LEDs of the light-emitting panels toward the ventilation holes, thereby maintaining a uniform temperature between adjacent cabinets and efficiently controlling heat generation of the entire display device. Background Technology

[0002] Conventional large-scale LED display systems consist of multiple cabinets combined to form the entire screen, with light-emitting panels, driving circuits, power modules, and input / output modules installed inside each cabinet. However, in conventional structures, heat generated inside the cabinet is generally concentrated in specific areas. This leads to problems such as reduced brightness, color distortion, and shortened component lifespan, particularly during prolonged operation, due to the temperature rise of the LEDs.

[0003] In this regard, prior registered patent No. 10-2827120 (Large display system with energy saving and high brightness) proposed a structure for dispersing heat to a plate supporting a light-emitting panel and a technology for discharging heat through ventilation passages formed at the top and bottom of the cabinet. Although the invention aimed for efficient heat dissipation and energy saving, the airflow was limited only to the vertical direction, and a structure for correcting temperature differences between adjacent cabinets in real time or dispersing heat in a connected manner was not implemented.

[0004] Therefore, conventional technology still contains limitations such as localized overheating problems due to heat dissipation imbalance between cabinets, non-uniformity of screen brightness, and thermal deformation of electronic circuits when a large display device is composed of multiple cabinets. The problem to be solved

[0005] The present invention aims to solve the problems of the conventional technology described above by forming multi-directional ventilation holes on the side walls of each cabinet and including a heat transfer line that effectively guides heat generated from the LEDs of the light-emitting panel toward the ventilation holes, thereby allowing air and heat to move freely in the up, down, left, and right directions and maintaining a uniform temperature between cabinets.

[0006] In addition, another objective is to maximize the heat dissipation efficiency of the entire display device and simultaneously secure power efficiency and high brightness maintenance characteristics by connecting adjacent cabinets through thermally conductive connectors to ensure continuous heat transfer and actively discharging heat from the outermost cabinet to the outside by providing a cooling means or a Peltier module. means of solving the problem

[0007] To achieve the above objective, a large display device having a connected heat dissipation structure according to one embodiment of the present invention, which saves energy and has high brightness, comprises: a cabinet in which a plurality of light-emitting panels capable of outputting a video signal are installed by arranging a plurality of light-emitting elements; a plate and a substrate arranged to support the light-emitting panels installed within the cabinet; and a power module and an input / output module installed on the plate. The display device comprises: a vent installed on the side wall of the cabinet to discharge heat inside the cabinet to the outside; and a heat transfer line that effectively guides heat generated from the LEDs of the light-emitting panels toward the vent. The vent is provided in the housing in the left and right directions as well as in the up and down directions, so that air flows freely in the up, down, left, and right directions, including between adjacent cabinets. The heat transfer line is characterized by being composed of at least one of a thermally conductive material, aluminum, copper, graphite or carbon composite, ceramic, nickel or titanium-based non-magnetic alloy, heat dissipation sheet, or paste.

[0008] It is desirable that the above heat transfer line be exposed on the side of the cabinet and connected to the heat transfer line of an adjacent cabinet through a thermally conductive connector to maintain a uniform temperature between adjacent cabinets.

[0009] It is desirable to install a temperature sensor in the cabinet that measures the internal temperature in real time to detect the temperature status inside the cabinet.

[0010] An output control device that controls the power supply according to the output of the above temperature sensor is further provided, making it possible to prevent overheating by adjusting the power amount and gray scale according to the internal temperature of the cabinet.

[0011] The above temperature sensor is installed in each cabinet, and when overheating of a specific cabinet is detected, it is possible to output a warning signal including temperature warning information and sensor identification information to indicate the location of the fault.

[0012] It is desirable to combine a cooling means at the end of the above heat transfer line to actively release heat from the outermost cabinet to the outside.

[0013] The above cooling means can cool the heat transfer line using a Peltier element.

[0014] The above cooling means may also be configured to use a water-cooled or air-cooled heat exchanger instead of a Peltier element. Effects of the invention

[0015] According to the present invention, the ventilation holes (60) of each cabinet are formed not only at the top and bottom but also on the left and right sides, so that air flow occurs in four directions, thereby preventing local temperature rise and maintaining a uniform temperature of the entire cabinet.

[0016] In addition, since the heat generated from the light-emitting panel (20) moves along the heat transfer line (70) toward the ventilation opening, the heat dissipation efficiency is improved and the LED lifespan is extended.

[0017] Furthermore, heat transfer is continuously carried out through thermally conductive connectors between adjacent cabinets, so that the heat dissipation structure of the entire display operates as a single integrated network, and cooling by the cooling module (90) is transferred to all cabinets to maintain a cooling balance.

[0018] Since real-time temperature measurement and power and grayscale control are possible through the temperature sensor (80) and output control device (110), damage caused by heat generation can be prevented and a high brightness state can be stably maintained. Brief explanation of the drawing

[0019] FIG. 1 is a rear open perspective view of a large display device having a connected heat dissipation structure according to one embodiment of the present invention, which saves energy and has high brightness, showing the configuration of a cabinet (10), a light-emitting panel (20), a plate (30), a power module (40), an input / output module (50), a ventilation opening (60), and a heat transfer line (70). FIG. 2 is a partial drawing showing the connection structure between adjacent cabinets (10-1, 10-2), illustrating the connection of the vents (60-1, 60-2) and the thermal coupling structure of the heat transfer lines (70-1, 70-2). FIG. 3 illustrates a control flow in which power and grayscale are controlled by a temperature sensor (80) and an output control device (110). FIG. 4 shows an example of a heat warning operation in which a warning signal of a temperature sensor (80) is displayed by a management terminal (100). FIG. 5 illustrates the structure of a cooling module (90) connected to a cooling means (92) and the flow of cooling being transferred through a heat transfer line (70). FIG. 6 is a diagram illustrating the flow in which ventilation and cooling are simultaneously performed between the entire cabinets according to the operation of the cooling module (90). Specific details for implementing the invention

[0020] Hereinafter, various embodiments and / or aspects are disclosed with reference to the drawings. For illustrative purposes, numerous specific details are disclosed in the following description to aid in a general understanding of one or more aspects. However, it will also be recognized by those skilled in the art that these aspects may be practiced without such specific details. The following description and the accompanying drawings describe specific exemplary aspects of one or more aspects in detail. However, these aspects are exemplary, and some of the various methods in the principles of the various aspects may be used, and the description is intended to include all such aspects and their equivalents.

[0021] As used herein, terms such as "examples," "examples," "aspects," "examples," etc., may not be interpreted as implying that any aspect or design described is better or more advantageous than other aspects or designs.

[0022] Additionally, the terms “comprising” and / or “comprising” should be understood to mean that the relevant feature and / or component is present, but not to exclude the presence or addition of one or more other features, components and / or groups thereof.

[0023] Additionally, terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. Such terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. The term "and / or" includes a combination of a plurality of related described items or any of a plurality of related described items.

[0024] Furthermore, in the embodiments of the present invention, all terms used herein, including technical or scientific terms, unless otherwise defined, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in the embodiments of the present invention.

[0025] FIG. 1 is a rear open perspective view of a large display device having a connected heat dissipation structure for energy saving and high brightness according to an embodiment of the present invention, illustrating the configuration of a cabinet (10), a light-emitting panel (20), a plate (30), a power module (40), an input / output module (50), a ventilation port (60), and a heat transfer line (70); FIG. 2 is a partial drawing showing a connection structure between adjacent cabinets (10-1, 10-2), illustrating the connection of ventilation ports (60-1, 60-2) and the thermal coupling structure of heat transfer lines (70-1, 70-2); FIG. 3 illustrates a control flow in which power and grayscale are controlled by a temperature sensor (80) and an output control device (110); FIG. 4 illustrates an example of a heat warning operation in which a warning signal of the temperature sensor (80) is displayed by a management terminal (100); FIG. 5 illustrates the structure of a cooling module (90) connected to a cooling means (92) and a heat transfer line (70). Figure 6 illustrates the flow through which cooling is delivered, and is a diagram explaining the flow in which ventilation and cooling are simultaneously performed between the entire cabinet according to the operation of the cooling module (90).

[0026] Meanwhile, in the following description, some components described in the drawings may be omitted or excessively enlarged or reduced in order to explain the function of each component of the present invention, but it will be understood that such illustrated components do not limit the technical features and scope of rights of the present invention.

[0027] In addition, in the following description, multiple drawings will be referred to simultaneously to explain a single technical feature or a component constituting the invention.

[0028] The present invention relates to a heat dissipation structure for a large display device configured by combining a plurality of cabinets, and is characterized by providing a connected heat transfer and cooling structure to minimize the temperature difference between each cabinet (10) constituting the entire screen, prevent a decrease in brightness of the light-emitting panel (20), and maintain a high brightness state for a long time.

[0029] A large display device according to one embodiment of the present invention comprises a cabinet (10) in which a plurality of light-emitting panels capable of outputting an image signal are installed by arranging a plurality of light-emitting elements, a plate (30) and a substrate arranged to support the light-emitting panels (20) installed within the cabinet (10), and a display device including a power module (40) and an input / output module (50) installed on the plate (30).

[0030] The cabinet (10) may be made of metal or insulating composite material, and aluminum alloy, magnesium alloy, or carbon fiber reinforced resin (CFRP) may be used to simultaneously satisfy lightweighting and rigidity. A light-emitting panel (20) with a plurality of LED elements arranged thereon is mounted on the front of each cabinet, and a plate (30) and a substrate are placed on the rear. The plate (30) serves to mechanically support the light-emitting panel while rapidly dissipating heat, and may be formed of aluminum or ceramic composite material. A power module (40) and an input / output module (50) are attached to the plate (30), and each includes a circuit that controls power supply and video data signals.

[0031] In addition, the display device according to the present invention includes a ventilation opening (60) installed on the side wall of the cabinet (10) to discharge heat from inside the cabinet (10) to the outside.

[0032] As illustrated in FIG. 1, the vents (60) are evenly distributed on the top, bottom, left, and right sides of the cabinet (10), and are designed so that the flow of internal air occurs not only in the vertical direction but also in the horizontal direction. The shape of the vents (60) can be modified into a circular, elliptical, square, or honeycomb grid structure, and each shape can be selected according to air resistance characteristics, dustproof performance, and structural rigidity. For example, honeycomb vents reduce turbulence in the airflow to induce efficient convective cooling, and square grids have the advantage of being easy to integrally mold onto the outer wall of a large cabinet. Additionally, the vents may be composed of a fine perforated mesh structure or a louver-type cover for waterproofing and dustproofing, and the angle of inclination may be adjusted to minimize the inflow of water droplets or dust when outside air is introduced.

[0033] Next, as a configuration for the heat dissipation structure of the present invention, a heat transfer line (70) is included to effectively guide heat generated from the LED of the light-emitting panel (20) toward the ventilation port (60). As mentioned above, the heat transfer line (70) may be applied or arranged in a manner to guide not only heat generated from the light-emitting panel (20) but also heat generated from the plate (30), power module (40), and input / output module (50) toward the ventilation port (60).

[0034] The heat transfer line (70) is positioned to contact the rear surface of the light-emitting panel (20) or the plate (30) to directly direct heat generated from the LED to the vent (60). This heat transfer line may be composed of at least one of aluminum, copper, graphite or carbon composite, ceramic, nickel or titanium-based non-magnetic alloy, heat dissipation sheet or paste.

[0035] The specific advantages of each material are as follows. Aluminum is lightweight, possesses excellent thermal conductivity (approximately 200 W / m·K), and has superior processability, making it suitable for large-area structures. Copper offers the highest level of thermal conductivity (over 400 W / m·K), making it advantageous for localized heat dissipation. Graphite and carbon composites exhibit excellent horizontal heat diffusion, have a lower specific gravity compared to metals, and offer minimal electromagnetic interference, making them suitable for electronic equipment. Ceramics possess insulating properties and high thermal conductivity, enabling stable heat diffusion while suppressing electrical interference. Nickel and titanium-based non-magnetic alloys ensure long-term reliability in outdoor environments due to their high corrosion resistance and mechanical strength. Thermal sheets or pastes reduce thermal resistance between irregular surfaces, improving the adhesion between the LED module and the plate.

[0036] Next, the above-mentioned ventilation opening (60) is provided in the housing in the left and right directions as well as in the up and down directions, and according to the configuration that allows air to flow freely in the up, down, left, and right directions including between adjacent cabinets (10), the air circulates freely not only inside the cabinet but also between adjacent cabinets (10-1, 10-2).

[0037] That is, as shown in FIG. 2, the vents (60-1, 60-2) of adjacent cabinets are connected to each other, and the heat transfer lines (70-1, 70-2) between the cabinets are also connected to each other or via a heat-conductive connector (160). Through this, air flows along the vents and heat moves along the heat transfer lines to achieve temperature equalization between adjacent cabinets.

[0038] At this time, the heat transfer line (70) of the present invention is composed of at least one of a thermally conductive material, aluminum, copper, graphite or carbon composite, ceramic, nickel or titanium-based non-magnetic alloy, heat dissipation sheet or paste, and a combination of these materials may be formed into a composite layer structure. For example, if a graphite sheet is laminated on an aluminum base or a copper film is attached on a ceramic insulating layer, lightness, insulation, and high thermal conductivity can be secured simultaneously.

[0039] Next, the heat transfer line (70) is exposed on the side of the cabinet (10) and connected to the heat transfer lines (70-1, 70-2) of adjacent cabinets (10-1, 10-2) through a thermally conductive connector (not shown) to maintain a uniform temperature between adjacent cabinets. According to the configuration, the connector (160) is formed of copper, aluminum, or silver-plated carbon composite material, etc., to continuously perform heat transfer between each cabinet. Through this connected structure, heat is transferred to the cooling module (90) of the outermost cabinet and rapidly released to the outside.

[0040] In addition, a temperature sensor (80) is installed in the cabinet (10) to measure the internal temperature in real time, and can perform the function of detecting the temperature state inside the cabinet.

[0041] The temperature sensor (80) can be implemented as a thermistor, thermocouple, RTD (resistance temperature detector), or non-contact infrared (IR) sensor. Thermistors are suitable for monitoring individual cabinet units because they have a fast response speed and are inexpensive, while RTDs are advantageous for digital control because they allow for precise temperature measurement. Infrared sensors can detect surface temperature even in an electrically insulated state, so they can be applied to structures insulated from LED modules.

[0042] Meanwhile, an output control device that controls the power supply according to the output of the temperature sensor (80) is further provided, and can perform a configuration function to prevent heat generation by adjusting the power amount and grayscale according to the internal temperature of the cabinet. The output control device (110) is a power control circuit based on a microcontroller or FPGA, which analyzes data from the temperature sensor in real time to adjust the power supply amount of the power module (40) and converts the grayscale signal through the input / output module (50). In this way, the amount of heat generated in each cabinet is uniformly controlled, and LED damage caused by overheating is prevented while maintaining image quality.

[0043] Additionally, a temperature sensor (80) may be installed in each cabinet (10), and when overheating of a specific cabinet is detected, it may function to output a warning signal including temperature warning information and sensor identification information to indicate the location of the fault. To this end, the management terminal (100) monitors data from multiple temperature sensors (80) connected via a network, and outputs a warning sound or displays identification information on a display when a specific cabinet is above a set temperature. This allows the maintenance worker to immediately check the high-temperature zone, thereby increasing maintenance efficiency.

[0044] Additionally, the end of the heat transfer line (70) can be connected to a cooling means (92) through a cooling line (91). That is, a cooling module (90) can be installed, thereby allowing the heat of the outermost cabinet to be actively released to the outside.

[0045] The cooling means (92) may be a Peltier element, which is a thermoelectric cooling element in which one side is cooled and the opposite side is heated according to the flow of current. The Peltier element is configured by alternately arranging P-type and N-type semiconductor materials, and operates on the principle that when an external current is applied, it absorbs heat from the cooling side and transfers it to the heating side.

[0046] Peltier elements are suitable for indoor displays due to their advantages of easy electronic control, miniaturization, and the fact that they do not require a separate cooling fluid.

[0047] Meanwhile, the cooling means (92) can be configured to use a water-cooled or air-cooled heat exchanger instead of the aforementioned Peltier element.

[0048] In a water-cooled cooling structure, a cooling water pump circulates cooling water (water or refrigerant) through a cooling line (91) to perform direct heat exchange with a heat transfer line (70). This method is suitable for large outdoor billboards or electronic display boards that operate for a long time and provides high cooling efficiency and stability.

[0049] In the case of air-cooled heat exchangers, the air at the rear of the cabinet is cooled by circulating outside air using heat dissipation fins and a blower fan. The air-cooled structure has the advantage of simple maintenance and does not require a separate coolant.

[0050] Ultimately, through each of the above-described embodiments and variations, the present invention provides a connected heat dissipation structure in which heat dissipation at the cabinet unit level as well as heat transfer and cooling interlocking between adjacent cabinets occur simultaneously, thereby maximizing the overall heat dissipation efficiency, brightness stability, component lifespan, and energy saving effects of a large display device.

[0051] Although the embodiments have been described above with reference to limited embodiments and drawings, those skilled in the art will understand that various modifications and variations are possible from the description above. Terms such as "include," "compose," or "have" as described above imply that components may be inherent unless specifically stated otherwise; therefore, they should be interpreted as allowing for the inclusion of additional components rather than excluding other components. Furthermore, the scope of protection of the present invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention.

Claims

Claim 1 A display device comprising a cabinet in which a plurality of light-emitting panels capable of outputting a video signal are installed by arranging a plurality of light-emitting elements, a plate and a substrate arranged to support the light-emitting panels installed within the cabinet, and a power module and an input / output module installed on the plate, wherein a ventilation opening installed on the side wall of the cabinet for discharging heat inside the cabinet to the outside; A large display device having a connected heat dissipation structure that saves energy and has high brightness, comprising: a heat transfer line that effectively guides heat generated from the LED of the light-emitting panel toward the ventilation opening; wherein the ventilation opening is provided in the housing in the left and right directions as well as in the up and down direction, allowing air to flow freely in the up, down, left, and right directions, including between adjacent cabinets; wherein the heat transfer line is made of at least one of a thermally conductive material, aluminum, copper, graphite or carbon composite, ceramic, nickel or titanium-based non-magnetic alloy, heat dissipation sheet, or paste, and is exposed on the side of the cabinet and connected to the heat transfer line of an adjacent cabinet through a thermally conductive connector to maintain a uniform temperature between adjacent cabinets, and wherein a cooling means is coupled to the end of the heat transfer line to actively release heat from the outermost cabinet to the outside. Claim 2 delete Claim 3 A large display device having a connected heat dissipation structure that saves energy and has high brightness, characterized in that, in claim 1, a temperature sensor is installed in the cabinet to measure the internal temperature in real time and detect the temperature state inside the cabinet. Claim 4 A large display device having a connected heat dissipation structure that saves energy and has high brightness, characterized in that, in paragraph 3, an output control device that controls the power supply according to the output of the temperature sensor is further provided to prevent heat generation by adjusting the power amount and gray scale according to the internal temperature of the cabinet. Claim 5 A large display device having a connected heat dissipation structure that saves energy and has high brightness, characterized in that, in paragraph 3, the temperature sensor is installed in each cabinet and outputs a warning signal including temperature warning information and sensor identification information to indicate the location of the fault when overheating of a specific cabinet is detected. Claim 6 delete Claim 7 A large display device having a connected heat dissipation structure that saves energy and has high brightness, wherein the cooling means cools the heat transfer line using a Peltier element in claim 1. Claim 8 A large display device having a connected heat dissipation structure that saves energy and has high brightness, characterized in that, in claim 7, the cooling means can be configured to use a water-cooled or air-cooled heat exchanger instead of a Peltier element.

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