A ruggedized display for use in cryogenic environments

Abstract

The utility model discloses a kind of reinforced displayers used in low temperature environment, by display screen module, heat control module and rear cover assembly screwing form closed cavity. Display screen module adopts shielding glass and liquid crystal screen OCA optical adhesive bonding structure, and three seals are realized by conductive rubber plate compression filling and glue sealing process;Heat control module includes customized VC uniform temperature plate, multilayer graphene flexible heat conduction band and red copper heating block, and surface contact heat conduction path is formed by pressing plate mechanical pressure joint;Rear cover assembly integrates power module and temperature control board, cooperate with the thermocouple of the back four corners of uniform temperature plate and realize accurate temperature control. The structure completely solves condensation fog problem, improves anti-vibration strength and electromagnetic shielding efficiency, suitable for-20 ℃ low temperature / vibration / hot and humid environment.

Description

Technical Field

[0001] This utility model relates to the field of liquid crystal display technology, specifically a ruggedized display for use in low-temperature environments. Background Technology

[0002] Display devices have become an indispensable part of people's daily lives, playing a vital role in work, study, and entertainment. For example, in the office, display devices are essential tools for image processing, document editing, and data analysis; in entertainment, they ensure high-quality display for games, movies, and television. In the defense field, display devices also play a crucial role and are indispensable. Especially in increasingly technologically advanced modern warfare, stable, reliable, and high-quality display devices are essential in command centers, assisting commanders in understanding the battlefield situation and intelligence information, helping them make more accurate decisions; in aircraft and ground vehicles, display devices help drivers better understand their surroundings, improving combat efficiency.

[0003] Conventional LCD (display) assemblies mainly consist of an LCD / LED display panel, a backlight, an FPC (flexible printed circuit board), an IC (microelectronic component), and a metal frame. To meet the demands of use in harsh environments such as high and low temperatures, humidity, vibration, and electromagnetic interference, ruggedized display devices are constructed by adding shielding glass, AD board control circuitry, a power supply system, and a reinforced housing to the LCD panel assembly. To improve the feasibility of using display devices in environments with temperatures as low as -20°C, various methods have been applied to the design of ruggedized display devices, including the application of heated shielding glass, the bonding assembly of heated shielding glass and the LCD panel, the application of heating devices with strip-shaped conductive paths, the application of resistor grid heating devices, and the application of wide-temperature LCD panels. However, these design methods also have certain drawbacks. 1) The application of heated shielding glass involves heating the LCD panel from the front. This method mainly involves adding heating wires to the shielding glass. Heating the heating wires raises the temperature of the shielding glass, thereby transferring heat to the LCD panel. To avoid obstructing the display area, the heating wires are distributed on both sides of the shielding glass. The disadvantages of this type of method are: heat is transferred from both ends to the middle, resulting in uneven heat distribution; heat diffuses on the shielding glass and then transfers to the LCD screen, spreading across it, resulting in very low overall efficiency. 2) Heating devices using strip-shaped conductive paths and resistive grid heating devices are methods of heating the LCD screen from the back. These methods mainly involve adding heat-conducting sheets or thermal resistors to the back structural frame of the LCD screen, using point contact and line contact to heat the heat-conducting sheets or thermal resistors, thereby increasing the temperature of the back structure of the LCD screen and ultimately heating the LCD screen. The disadvantages of this type of method are: while the heat-conducting sheets or thermal resistors improve the temperature uniformity of the heating process, the heat gradient is still very obvious; the introduction of too many components will lead to a significant reduction in overall reliability; heat diffuses on the back structural frame and then transfers to the LCD screen, spreading across it, resulting in very low heating efficiency. 3) Applying wide-temperature LCD screens is a method of changing the inherent properties of the LCD screen. With the development of technology, many LCD screens can now operate at a wide temperature range, currently reaching -30℃ or even -40℃. This type of method utilizes the inherent properties of LCD screens to enable them to operate at low temperatures. However, its disadvantages are: low temperatures can affect the viscosity of the liquid crystal material, thus affecting the screen's refresh rate and potentially reducing the efficiency of the backlight system, thereby impacting screen brightness and color performance; furthermore, prolonged use at low temperatures can affect the performance of electronic components and reduce the reliability of the equipment. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, one objective of this invention is to provide a ruggedized display for use in low-temperature environments. This ruggedized display, through the application of a thermal control module, ensures uniform temperature within a 5°C temperature difference during the heating process, guaranteeing that the LCD screen maintains its optimal operating temperature range of 10-35°C during operation, thereby improving the reliability of the LCD screen. Simultaneously, it incorporates characteristics such as resistance to damp heat, salt spray, vibration, and electromagnetic interference, making it suitable for harsh low-temperature environments and applicable to numerous fields including defense, navigation, power plants, field operations, and chemical industries.

[0005] To address the above problems, this utility model provides a ruggedized display for use in low-temperature environments, comprising:

[0006] The display module, located at the front of the monitor, is used to display images;

[0007] The thermal control module, located behind the display module, is used for thermal management.

[0008] The rear cover assembly, located at the rear of the display, is connected to the display module by screws to form a closed cavity;

[0009] The thermal control module is assembled in the cavity between the display module and the back cover assembly; the display module includes a front panel and an LCD display unit; the thermal control module includes a VC heat spreader, a flexible heat conduction tape, and a heating block; the back cover assembly includes a back cover and a power module.

[0010] Preferably, the display module comprises, from the front to the rear of the display, the following components:

[0011] The front panel is a plate-shaped structure milled from 5-series aluminum alloy and is located at the very front of the display.

[0012] The shielding glass and the LCD screen are bonded together with OCA optical adhesive to form a flat display unit located on the inside of the front panel.

[0013] A conductive rubber sheet, 1mm thick, is compressed and filled in the gap between the shielding glass and the front panel, and is fixed by mounting brackets and screws.

[0014] The AD board is a circuit board structure located behind the LCD screen;

[0015] The shielding glass, LCD screen, and conductive rubber sheet are bonded to the front panel as a single unit using 3145 adhesive.

[0016] Preferably, the structure of the thermal control module includes:

[0017] The VC heat spreader is a custom-designed metal plate structure that is fastened to the back of the LCD screen with screws and makes contact with the chip position on the AD board.

[0018] The flexible heat-conducting tape is a strip structure formed by bonding multiple layers of CVD-encapsulated graphene thermal conductive sheets, with a single-layer thermal conductivity ≥1500W / m·K.

[0019] The heating element is a block-shaped structure made of copper, with a power of 10W, and is located on the back cover of the back cover assembly.

[0020] The first and second pressure plates are metal pressing components; the first pressure plate presses one end of the flexible heat-conducting tape tightly against the rear surface of the VC heat exchanger, and the second pressure plate presses the other end of the flexible heat-conducting tape tightly against the surface of the heating block.

[0021] Preferably, a thermally conductive pad is filled between the VC heat spreader and the back of the LCD screen. The thermally conductive pad has a sheet-like structure and a thermal conductivity of 15 W / m·K, which is used to eliminate contact gaps.

[0022] Thermocouples, which are temperature sensors, are arranged at the four corners of the back of the VC heat spreader and are connected to the temperature control board of the back cover assembly via cables.

[0023] Preferably, the back cover is a shell structure milled from 5-series aluminum alloy and located at the rear of the display.

[0024] The power module, which is the power supply unit, is installed on the inside of the back cover with screws;

[0025] The temperature control board is a circuit board structure, mounted on the back cover, and connected to the power module and thermocouples via cables.

[0026] Preferably, the connection between the heating block and the back cover is a direct assembly, and the surface of the heating block forms surface contact with the flexible heat-conducting tape through the second pressure plate;

[0027] The two ends of the flexible heat-conducting tape are not encapsulated and are in direct contact with the bonding surfaces of the VC heat spreader and the heating block.

[0028] Preferably, the mounting bracket is a metal corner structure, which uses screws to fix the bonding components of the shielding glass and the LCD screen to the front panel;

[0029] The AD board is located close to the back of the LCD screen and is electrically connected to the LCD screen via a connector.

[0030] Preferably, the outer surfaces of the front panel and the back cover are treated with conductive oxidation and painting.

[0031] The conductive rubber sheet fills the gaps under compression to ensure the sealing and electromagnetic continuity of the display module.

[0032] The advantages of this utility model compared with the prior art are as follows:

[0033] 1. This utility model discloses a ruggedized display for use in low-temperature environments, which adopts a modular cavity design and forms a closed ruggedized cavity by screwing together the display module, the thermal control module, and the back cover assembly. Figure 1 (Illustrative image). This structure enables the equipment to: improve vibration resistance: mechanical connections replace traditional clips, reducing displacement during vibration testing; and enhance environmental adaptability: the cavity blocks external moisture and salt spray intrusion, meeting the GJB150A-2009 military environmental standard.

[0034] 2. This utility model provides a ruggedized display for use in low-temperature environments. It adopts an innovative bonding and sealing structure to eliminate condensation and fogging: After bonding the shielding glass and the LCD screen with OCA optical adhesive, the air layer is completely eliminated, avoiding internal fogging caused by alternating low and high temperatures; Triple sealing protection: conductive rubber plate compression filling + 3145 adhesive sealing + mounting corner screw fixing, so that the device still maintains the IP67 protection level in an environment with 85% humidity; Doubled structural strength: The integrated adhesive sealing design improves impact resistance.

[0035] 3. This utility model provides a ruggedized display for use in low-temperature environments, employing a surface contact heat conduction system, achieving a breakthrough in temperature uniformity: the VC heat spreader is fully bonded to the back of the LCD screen via a thermally conductive adhesive. Figure 3 (Illustrative image) Combined with graphene material (1500W / m·K) in conjunction with flexible heat-conducting tape, a bidirectional temperature difference of ≤5℃ for heating / cooling is achieved; High-efficiency thermal response: The physical conduction path of heating block → graphene heat-conducting tape → VC heat spreader allows the LCD screen to heat up to 10℃ in just 8 minutes after power-on in a -20℃ environment (compared to 25 minutes in traditional solutions); Enhanced reliability: Mechanical pressing of the first and second pressure plates replaces welding, avoiding the risk of high-temperature desoldering, and extending the lifespan of the connection structure by 3 times in thermal cycling tests.

[0036] 4. The present invention provides a ruggedized display for use in low-temperature environments, which uses thermocouples for precise monitoring: four thermocouples are arranged at the four corners of the VC heat spreader, directly contacting the monitoring point to reduce temperature error and avoid local overcooling / overheating caused by traditional single-point monitoring.

[0037] 5. This utility model provides a ruggedized display for use in low-temperature environments, which has advantages in electromagnetic compatibility and durability: Conductivity continuity: The 5-series aluminum alloy front panel / back cover with anodized paint + compressed conductive rubber plate significantly enhances the electromagnetic shielding effectiveness of the device; Long-term stability: The copper heating block is in direct contact with the unencapsulated graphene conductive tape, with no aging medium attenuation and high power conduction efficiency maintenance rate. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0039] Figure 1 This is a three-dimensional exploded view of the reinforced display of this utility model;

[0040] Figure 2 This is a three-dimensional exploded view of the display module in this utility model;

[0041] Figure 3 This is a three-dimensional exploded view of the thermal control module in this utility model;

[0042] Figure 4 This is a three-dimensional exploded view of the rear cover assembly in this utility model;

[0043] Figure 5 This is a flowchart illustrating the workflow of this utility model.

[0044] In the diagram: 1-Display module; 2-Thermal control module; 3-Rear cover assembly; 4-Front panel; 5-Conductive rubber sheet; 6-Shielding glass; 7-LCD screen; 8-Thermal conductive pad; 9-Mounting corner bracket; 10-VC heat spreader; 11-AD board; 12-First pressure plate; 13-Second pressure plate; 14-Flexible heat transfer tape; 15-Temperature control board; 16-Heating block; 17-Thermocouple; 18-Rear cover; 19-Power module. Detailed Implementation

[0045] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0046] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0047] The present invention will now be described in further detail with reference to the accompanying drawings.

[0048] Combination Figures 1-5 This utility model discloses a ruggedized display for use in low-temperature environments, comprising:

[0049] Display module 1, located at the front of the monitor, is used to display images;

[0050] Thermal control module 2, located behind the display module, is used for thermal management;

[0051] The rear cover assembly 3 is located at the rear of the display and is connected to the display module by screws to form a closed cavity;

[0052] The thermal control module is assembled in the cavity between the display module and the back cover assembly; the display module includes a front panel 4 and an LCD display unit; the thermal control module includes a VC heat spreader 10, a flexible heat conduction tape 14 and a heating block 16; the back cover assembly includes a back cover 18 and a power module 19.

[0053] Preferably, the display module comprises, from the front to the rear of the display, the following components:

[0054] The front panel is a plate-shaped structure milled from 5-series aluminum alloy and is located at the very front of the display.

[0055] The shielding glass 6 and the LCD screen 7 are bonded together with OCA optical adhesive to form a flat display unit located on the inside of the front panel.

[0056] A conductive rubber sheet 5, 1mm thick, is compressed and filled in the gap between the shielding glass and the front panel, and is fixed by mounting brackets 9 and screws.

[0057] AD board 11 is a circuit board structure located behind the LCD screen;

[0058] The shielding glass, LCD screen, and conductive rubber sheet are bonded to the front panel as a single unit using 3145 adhesive.

[0059] Preferably, the structure of the thermal control module includes:

[0060] The VC heat spreader is a custom-designed metal plate structure that is fastened to the back of the LCD screen with screws and makes contact with the chip position on the AD board.

[0061] The flexible heat-conducting tape is a strip structure formed by bonding multiple layers of CVD-encapsulated graphene thermal conductive sheets, with a single-layer thermal conductivity ≥1500W / m·K.

[0062] The heating element is a block-shaped structure made of copper, with a power of 10W, and is located on the back cover of the back cover assembly.

[0063] The first pressure plate, 12, and the second pressure plate, 13 are metal pressing components; wherein, the first pressure plate presses one end of the flexible heat conduction tape tightly against the rear surface of the VC heat exchange plate, and the second pressure plate presses the other end of the flexible heat conduction tape tightly against the surface of the heating block.

[0064] Preferably, a thermally conductive patch 8 is filled between the VC heat spreader and the back of the LCD screen. The thermally conductive patch has a sheet-like structure and a thermal conductivity of 15W / m·K, which is used to eliminate contact gaps.

[0065] Thermocouples 17 are temperature sensors, four in number, arranged at the four corners of the back of the VC heat spreader, and connected to the temperature control board 15 of the rear cover assembly via cables.

[0066] Preferably, the back cover assembly includes:

[0067] The back cover is a shell structure milled from 5-series aluminum alloy and is located at the very back of the display.

[0068] Power module 19 is a power supply unit, which is installed on the inside of the back cover by screws;

[0069] The temperature control board is a circuit board structure, mounted on the back cover, and connected to the power module (19) and thermocouple via cables.

[0070] Preferably, the connection between the heating block and the back cover is a direct assembly, and the surface of the heating block forms surface contact with the flexible heat-conducting tape through the second pressure plate;

[0071] The two ends of the flexible heat-conducting tape are not encapsulated and are in direct contact with the bonding surfaces of the VC heat spreader and the heating block.

[0072] Preferably, the mounting bracket is a metal corner structure, which uses screws to fix the bonding components of the shielding glass and the LCD screen to the front panel;

[0073] The AD board is located close to the back of the LCD screen and is electrically connected to the LCD screen via a connector.

[0074] Preferably, the outer surfaces of the front panel and the back cover are treated with conductive oxidation and painting.

[0075] The conductive rubber sheet fills the gaps under compression to ensure the sealing and electromagnetic continuity of the display module.

[0076] To more clearly illustrate the specific implementation of this utility model, an embodiment is provided below:

[0077] 1) The components of a ruggedized display device are as follows: Figure 1As shown, the device consists of 1. a display module, 2. a thermal control module, and 3. a rear cover assembly. The display module and the rear cover assembly are screwed together to assemble the thermal control module inside the device, forming a closed cavity. Exposed structural components, such as the front panel and rear cover, are made of 5-series aluminum alloy, milled and treated with conductive oxidation and painting to ensure reliable operation of the device in harsh environments.

[0078] 2) Schematic diagram of the display module as follows Figure 2 As shown, the module mainly consists of 4 front panel, 5 conductive rubber plate, 6 shielding glass, 7 LCD screen, 9 mounting brackets, and 11 AD board. The design and molding steps of this component are as follows:

[0079] ① The first step is to perform the bonding process, which involves bonding the 6 shielding glass and the 7 LCD screen together with OCA optical adhesive to form a display bonding assembly. This eliminates the air between the LCD screen and the shielding glass, preventing problems such as condensation droplets or fogging caused by the LCD screen coming into contact with cold air during the heating process, which can affect the display effect.

[0080] ② The second step is to carry out the installation work. Use the mounting brackets and screws to fix the display bonding component and the conductive rubber plate to the front panel. The conductive rubber plate is designed to be 1mm thick and 20% compressed. The function of this component is twofold: first, after being compressed, it fills the gap between the display bonding component and the front panel to ensure the airtightness of the equipment; second, it ensures the conductive continuity between the display bonding component and the front panel to ensure the electromagnetic compatibility of the equipment.

[0081] ③ The third step is to perform a sealing operation, using 3145 glue to fill the area between the display bonding components and the front panel to further enhance the sealing of the module.

[0082] ④ Fourth step, install the 2 thermal control modules. 7. Use a custom-made LCD screen without a back cover or a shelf product with the back cover removed. Based on the shape of the back of the LCD screen and the position of the components, customize a corresponding 10 VC vapor chamber plate for contact with the components on the LCD screen. On the other side of the 10 VC vapor chamber plate, process contact bosses according to the shape and position of the 11 AD board or other components. Secure the 10 VC vapor chamber plate to the display module with screws. To ensure good contact between the 10 VC vapor chamber plate and the display module, add 8 thermal conductive pads between them to eliminate contact gaps. The thermal conductivity of the thermal conductive pads is 15 W / m·K.

[0083] The four steps described above serve two purposes: First, by bonding, sealing, and installing, the LCD screen and structural components are integrated, significantly improving the overall strength of the LCD screen and the airtightness of the equipment to meet the requirements of use in environments with strong vibration, high humidity and heat, and high salt spray. Second, by utilizing the excellent heat dissipation properties of the heat spreader, the heat of the display module can be quickly and evenly distributed in high-temperature environments, while in low-temperature environments, the display module can be uniformly heated by the thermal control module.

[0084] 3) A schematic diagram of the thermal control module is shown below. Figure 3 As shown, it mainly consists of 12 (first pressure plate), 13 (second pressure plate), 14 (flexible heat conduction plate), 15 (temperature control plate), 16 (heating block), 17 (thermocouple), and 10 (VC heat spreader). The 14 flexible heat conduction plate is composed of multiple layers of millimeter-level CVD-encapsulated graphene thermal conductive sheets bonded together and then encapsulated with adhesive and plastic. Each layer of thermal conductive sheet has a thermal conductivity of 1500 W / m·K. The ends of the heat conduction plate are not encapsulated or plastic-encapsulated at the joints with the heat spreader and the back cover. The 16 heating block is made of copper with good thermal conductivity. During installation, the 12 first pressure plate is used to press the flexible heat conduction plate tightly against the 10VC heat spreader, and the 13 second pressure plate is used to press the other end of the heat conduction plate and the 16 heating block tightly against the back cover. Figure 4 The module is equipped with four 17 thermocouples, which are attached to the four corners of the back of the 10VC heat spreader to measure the temperature signals at the four corners of the heat spreader and feed the signals back to the 15 temperature control board. The 15 temperature control board and the 16 heating block are both assembled into the back cover assembly, and together with the power module in the back cover assembly, they form a temperature control loop.

[0085] 4) Schematic diagram of the back cover assembly as shown below Figure 4 As shown. The rear cover assembly mainly consists of the 18 rear cover, the 19 power module, and accessories such as filters and aviation sockets mounted on the rear cover. The 19 power module is mainly used to power the 7 display screen, the 11 AD board, and the 15 temperature control board.

[0086] 5) The thermal control workflow diagram of the equipment is as follows: Figure 5 As shown. ① After external power is input, the power module supplies power to the AD board, LCD screen, and temperature control board. ② The temperature control board controls the thermocouples to collect temperature data at four points on the back of the VC vapor chamber in the thermal control module and makes judgments: When the temperature is less than 5℃, the temperature control board controls the power module to supply power to the heating block, and the heating block works at full power. Its heat is conducted to the VC vapor chamber through the flexible heat-conducting tape in the thermal control module and heats the LCD screen and AD board; when the temperature is between 5-30℃, the temperature control board controls the power module to reduce the voltage supply to the heating block, and the heating block works at reduced power; when the temperature is greater than 30℃, the temperature control board controls the power module to cut off the power to the heating block. At this time, the heating block no longer generates heat, but acts as the cold end in the entire thermal control module, absorbing heat and transferring it to the back cover for heat dissipation of the LCD screen. ③ After the equipment is started, the thermocouples detect the temperature every 10 minutes, and the temperature control board adjusts the working mode of the heating block according to the measurement results.

[0087] 6) Because the temperature difference of the VC vapor chamber in this device is 4-5℃, the measurement temperature is set to 5-30℃ to ensure that the LCD screen temperature is within the optimal operating temperature range of 10-35℃. This judgment temperature can be adjusted according to the characteristics of the VC vapor chamber and the inherent properties of the LCD screen. The thermocouple detection interval is 10 minutes, which can also be adjusted according to the actual ambient temperature of the equipment.

[0088] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited to this. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A ruggedized display for use in low-temperature environments, characterized in that, include: The display module (1) is located at the front of the display and is used to display images; A thermal control module (2), located behind the display module (1), is used for thermal management; The rear cover assembly (3) is located at the rear of the display and is connected to the display module (1) by screws to form a closed cavity; The thermal control module (2) is assembled in the cavity between the display module (1) and the back cover assembly (3); the display module (1) includes a front panel (4) and a liquid crystal display unit; the thermal control module (2) includes a VC heat spreader (10), a flexible heat conduction tube (14) and a heating block (16); the back cover assembly (3) includes a back cover (18) and a power module (19).

2. The ruggedized display for use in low-temperature environments according to claim 1, characterized in that: The display module (1) comprises, from the front to the rear of the display, the following components: The front panel (4) is a plate-shaped structure milled from 5-series aluminum alloy and is located at the front of the display. The shielding glass (6) and the liquid crystal screen (7) are bonded together by OCA optical adhesive to form a flat display unit located on the inside of the front panel (4); A conductive rubber sheet (5), 1 mm thick, is compressed and filled in the gap between the shielding glass (6) and the front panel (4), and is fixed by mounting brackets (9) and screws; AD board (11) is a circuit board structure located behind LCD screen (7); The shielding glass (6), the LCD screen (7) and the conductive rubber plate (5) are bonded together with the front panel (4) using 3145 adhesive to form an integrated structure.

3. A ruggedized display for use in low-temperature environments according to claim 2, characterized in that: The structure of the thermal control module (2) includes: The VC heat spreader (10) is a custom metal plate structure that is fastened to the back of the LCD screen (7) with screws and contacts the chip position of the AD board (11). The flexible heat-conducting tape (14) is a strip structure formed by bonding multiple CVD-encapsulated graphene thermal conductive sheets, with a single-layer thermal conductivity ≥1500W / m·K. The heating block (16) is a block structure made of copper with a power of 10W, located on the back cover (18) of the back cover assembly (3); The first pressure plate (12) and the second pressure plate (13) are metal pressing components; wherein, the first pressure plate (12) presses one end of the flexible heat conduction tape (14) tightly against the rear surface of the VC heat exchange plate (10), and the second pressure plate (13) presses the other end of the flexible heat conduction tape (14) tightly against the surface of the heating block (16).

4. A ruggedized display for use in low-temperature environments according to claim 3, characterized in that: A thermally conductive patch (8) is filled between the VC heat spreader (10) and the back of the LCD screen (7). The thermally conductive patch (8) has a sheet-like structure and a thermal conductivity of 15 W / m·K, which is used to eliminate contact gaps. It also includes thermocouples (17), which are temperature sensors. There are 4 of them, which are arranged at the four corners of the back of the VC heat spreader (10) and connected to the temperature control board (15) of the back cover assembly (3) via cables.

5. A ruggedized display for use in low-temperature environments according to claim 1, characterized in that: The rear cover assembly (3) includes: The rear cover (18) is a shell structure milled from 5-series aluminum alloy and is located at the rear of the display. The power module (19) is a power supply unit and is installed on the inside of the rear cover (18) by screws; The temperature control board (15) is a circuit board structure, which is mounted on the back cover (18) and connected to the power module (19) and thermocouple (17) via cables.

6. A ruggedized display for use in low-temperature environments according to claim 3, characterized in that: The connection between the heating block (16) and the rear cover (18) is a direct assembly, and the surface of the heating block (16) forms a surface contact with the flexible heat-conducting tape (14) through the second pressure plate (13); The two ends of the flexible heat-conducting tape (14) are not encapsulated and are in direct contact with the bonding surfaces of the VC heat exchange plate (10) and the heating block (16).

7. A ruggedized display for use in low-temperature environments according to claim 2, characterized in that: The mounting bracket (9) is a metal corner structure, which uses screws to fix the bonding components of the shielding glass (6) and the liquid crystal screen (7) to the front panel (4); The AD board (11) is located close to the back of the LCD screen (7) and is electrically connected to the LCD screen (7) via a connector.

8. A ruggedized display for use in low-temperature environments according to claim 2, characterized in that: The outer surfaces of the front panel (4) and the rear cover (18) are treated with conductive oxidation and spray painting; The conductive rubber plate (5) fills the gap under compression to ensure the sealing and electromagnetic continuity of the display module (1).

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