Liquid crystal display (LCD) liquid cooling heat dissipation structure for projector

Abstract

The utility model relates to the technical field of liquid crystal display (LCD) projectors, and discloses an LCD liquid cooling heat dissipation structure for a projector, which comprises an LCD and a heat insulation light-transmitting plate, the LCD and the heat insulation light-transmitting plate are connected in a sealing way, and cooling liquid is filled between the LCD and the heat insulation light-transmitting plate; the end, facing the heat insulation light-transmitting plate, of the driving motor is rotationally connected with a cylindrical driving magnet. The driven rotor assembly is arranged in the cooling liquid, the driven rotor assembly comprises paddles and a cylindrical driven magnet, the driven magnet and the driving magnet are coaxially arranged, and torque transmission under magnetic field driving is achieved on the premise that the heat dissipation structure is kept sealed through a non-contact transmission structure of the driving magnet and the driven magnet. The leakage risk of the cooling liquid is effectively avoided, the non-contact transmission structure enables the driving magnet to drive the blades in the driven rotor assembly to rotate under the driving of the driving motor, the flowability of the cooling liquid can be effectively enhanced, and the problem that the natural convection efficiency is low in a traditional internal circulation liquid cooling mode is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of LCD projectors, in particular to an LCD liquid cooling and heat dissipation structure for projectors. Background Art

[0002] LCD (liquid crystal display) projection technology, due to its high image clarity and excellent color reproduction, is widely used in education, engineering, and home entertainment. With growing market demand for high-brightness and large-screen projection, LCD projector designs are gradually moving towards higher-power light sources. However, this increased light source power directly generates more heat. A considerable portion of this light is absorbed and converted into heat energy as it passes through the LCD, causing the LCD to heat up. Excessive temperatures not only affect the LCD's display quality (such as brightness and color uniformity) but also shorten its lifespan. Therefore, heat dissipation technology has become a critical component of LCD projector design, playing a vital role in projection performance and reliability.

[0003] Currently, LCD projectors primarily use air cooling or liquid cooling for heat dissipation. Air cooling technology relies on air flow to remove heat from the LCD surface, but its cooling efficiency is low and it can easily introduce dust contamination, causing damage to optical components and even affecting image quality. Liquid cooling solutions are divided into external circulation and internal circulation. Internal circulation liquid cooling uses cooling plates or immersion cooling to seal the coolant around the LCD, dissipating heat through natural convection. However, the existing internal circulation liquid cooling method has insufficient convection efficiency, resulting in the inability to dissipate heat in a timely manner. This can easily lead to localized heat accumulation in the middle and lower parts of the LCD, accelerating LCD aging, resulting in uneven brightness or yellowing, and significantly affecting the display quality and lifespan of the projector.

[0004] Therefore, it is necessary to provide a liquid cooling and heat dissipation structure for LCDs used in projectors to solve the problem of insufficient convection efficiency of the internal circulation liquid cooling of the above-mentioned LCDs. Utility Model Content

[0005] The purpose of the utility model is to provide a liquid cooling and heat dissipation structure for LCD of a projector, so as to solve the technical problems mentioned in the background technology.

[0006] The utility model adopts the following technical solutions:

[0007] An LCD liquid cooling and heat dissipation structure for a projector, comprising:

[0008] An LCD and a heat-insulating light-transmitting plate, wherein one end surface of the LCD is sealed to the heat-insulating light-transmitting plate, and a coolant is filled between the LCD and the heat-insulating light-transmitting plate;

[0009] a drive motor, the drive motor being disposed on an end surface of the heat-insulating and light-transmitting plate away from the LCD, the drive end of the drive motor being fixedly connected to a cylindrical active magnet, the end of the active magnet away from the drive motor being directed toward the heat-insulating and light-transmitting plate;

[0010] The passive rotor assembly is arranged in the coolant and includes a blade and a cylindrical passive magnet. The passive magnet and the active magnet are coaxially arranged so that the blade rotates synchronously with the passive magnet and the active magnet.

[0011] Furthermore, the passive rotor assembly includes an impeller, the impeller is provided with a hub and the blades, the blades are fixedly arranged on the outside of the hub, the passive magnet is embedded in the hub, and the hub and the passive magnet are coaxially arranged.

[0012] Furthermore, the driving motor includes a stator assembly and an active rotor assembly. The active rotor assembly is sleeved on the outside of the stator assembly, and the active rotor assembly is rotatably connected to the stator assembly via a rotating shaft.

[0013] Furthermore, the stator assembly includes a bracket, an end of the bracket facing the heat-insulating and light-transmitting plate is connected to a circuit board, an end surface of the circuit board away from the bracket is connected to a coil, and the rotating shaft is arranged through the middle of the coil.

[0014] Furthermore, the active rotor assembly includes an annular soft magnet, which is sleeved on the outside of the coil. A motor housing is fixedly sleeved on the outside of the annular soft magnet, and the motor housing is fixedly connected to one end of the rotating shaft away from the circuit board.

[0015] Furthermore, a boss is provided on one end of the motor housing facing the heat-insulating light-transmitting plate, and the boss is fixedly connected to the active magnet.

[0016] Furthermore, it also includes a temperature sensor and a controller, and the temperature sensor and the controller are electrically connected to the circuit board respectively.

[0017] Furthermore, a radiator is provided on one side of the LCD, and the radiator is connected to the cooling liquid and is used to conduct the heat of the cooling liquid to the outside.

[0018] Furthermore, the heat-insulating light-transmitting plate is a heat-insulating glass plate or a Fresnel lens.

[0019] Beneficial effects:

[0020] The utility model provides an LCD liquid cooling heat dissipation structure for a projector. Through the non-contact transmission structure of the active magnet and the passive magnet, torque transmission under the drive of the magnetic field is realized while keeping the heat dissipation structure sealed, thereby effectively avoiding the risk of leakage of the cooling liquid. In addition, the non-contact transmission structure enables the active magnet to drive the blades in the passive rotor assembly to rotate under the drive of the drive motor, which can effectively enhance the fluidity of the cooling liquid and solve the problem of low natural convection efficiency in the traditional internal circulation liquid cooling method. The cooling liquid flows evenly through various areas of the LCD surface during the circulation process, which not only effectively reduces the overall temperature of the LCD, but also prevents the accumulation of local thermal effects, avoids problems such as uneven brightness, yellowing or decreased display effect due to overheating, thereby significantly extending the service life of the LCD and improving the display quality and reliability of the projector. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a liquid cooling heat dissipation structure for LCD projectors of the present invention;

[0022] Figure 2 This is an exploded schematic diagram of the drive structure of the utility model;

[0023] Among them: 1. LCD; 2. Heat-insulating and light-transmitting plate; 3. Coolant; 4. Drive motor; 410. Stator assembly; 411. Bracket; 412. Circuit board; 413. Coil; 420. Active rotor assembly; 421. Annular soft magnet; 422. Motor housing; 423. Boss; 430. Rotating shaft; 5. Active magnet; 6. Passive rotor assembly; 61. Impeller; 611. Hub; 612. Blade; 62. Passive magnet.

[0024] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "several" means two or more, unless otherwise clearly and specifically defined.

[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections, direct connections, or indirect connections through an intermediate medium; they may refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0028] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0029] Reference Figures 1 to 2 The present invention proposes a liquid cooling heat dissipation structure for LCD used in projectors, comprising: an LCD 1 and a heat-insulating and light-transmitting plate 2, wherein one end surface of the LCD 1 is sealedly connected to the heat-insulating and light-transmitting plate 2, and a cooling liquid 3 is filled between the LCD 1 and the heat-insulating and light-transmitting plate 2;

[0030] a drive motor 4, the drive motor 4 being disposed on an end surface of the heat-insulating and light-transmitting plate 2 away from the LCD 1, a drive end of the drive motor 4 being fixedly connected to a cylindrical active magnet 5, an end of the active magnet 5 away from the drive motor 4 being directed toward the heat-insulating and light-transmitting plate 2;

[0031] The passive rotor assembly 6 is arranged in the coolant 3, and the passive rotor assembly 6 includes a blade 612 and a cylindrical passive magnet 62. The passive magnet 62 is coaxially arranged with the active magnet 5 so that the blade 612 rotates synchronously with the passive magnet 62 and the active magnet 5.

[0032] When the drive motor 4 is started, the active magnet 5 rotates with the motor. Since the passive magnet 62 is coaxially arranged with the active magnet 5, the passive magnet 62 also rotates with it. The paddle 612 in the passive rotor assembly 6 is connected to the passive magnet 62. Therefore, when the passive magnet 62 rotates, the paddle 612 also rotates. The rotation of the paddle 612 in the coolant 3 effectively stirs the coolant 3, thereby promoting the flow of the coolant 3 between the LCD 1 and the heat-insulating and light-transmitting panel 2, removing heat.

[0033] The liquid cooling heat dissipation structure of the LCD achieves the purpose of heat dissipation by filling the coolant 3 between the LCD 1 and the heat-insulating and light-transmitting plate 2, and using the drive motor 4 to drive the magnets to rotate synchronously, thereby stirring the coolant 3 to flow. Specifically, the non-contact transmission structure of the active magnet 5 and the passive magnet 62 drives the blades 612 in the passive rotor assembly 6 to rotate, which can effectively enhance the fluidity of the coolant 3 and solve the problem of low natural convection efficiency in the traditional internal circulation liquid cooling method. The coolant 3 flows evenly through various areas of the LCD 1 surface during the circulation process, which not only effectively reduces the overall temperature of the LCD 1, but also prevents the accumulation of local thermal effects, avoiding problems such as uneven brightness, yellowing or reduced display effect due to overheating, thereby significantly extending the service life of the LCD 1 and improving the display quality and reliability of the projector.

[0034] In the present invention, a frame made of hard material is used as an outer frame part between LCD1 and the heat-insulating and light-transmitting plate 2 for sealing connection, so that LCD1 and the heat-insulating and light-transmitting plate 2 form a cavity for filling with coolant 3. The hard material of the frame is preferably PVC, and the sealing connection method uses sealant to fill the connection gap.

[0035] In one embodiment, the passive rotor assembly 6 includes an impeller 61, and the impeller 61 is provided with a hub 611 and the blades 612. The blades 612 are fixedly arranged on the outside of the hub 611, and the passive magnet 62 is embedded in the hub 611. The hub 611 and the passive magnet 62 are coaxially arranged. The non-rigid connection design can also ensure that the blades 612 rotate coaxially relative to the drive motor, reducing vibration and friction.

[0036] The active magnet 5 is fixed to the rotating shaft 430 of the drive motor 4, while the passive magnet 62 is embedded in the hub 611 of the passive rotor assembly 6. When the drive motor 4 is running, the magnetic field between the active magnet 5 and the passive magnet 62 acts, causing the impeller 61 in the passive rotor assembly 6 to rotate along with the passive magnet 62, thereby driving the flow of the coolant 3. To improve cooling efficiency, the blades 612 of the impeller 61 are designed to be spiral, which can create a spiral flow path for the coolant 3 during flow, thereby increasing the contact area between the coolant 3 and the surface of the LCD 1 and improving the heat dissipation effect. In addition, the propeller blades 612 can also reduce turbulence in the flow of the coolant 3, making the flow of the coolant 3 more stable and further reducing the temperature of the LCD 1.

[0037] In one embodiment, the driving motor 4 includes a stator assembly 410 and an active rotor assembly 420 . The active rotor assembly 420 is sleeved on the outside of the stator assembly 410 . The active rotor assembly 420 is rotatably connected to the stator assembly 410 via a rotating shaft 430 .

[0038] In this LCD liquid cooling and heat dissipation structure, when the stator assembly 410 of the drive motor 4 is energized, the generated rotating magnetic field drives the active rotor assembly 420 to rotate. The magnetic field between the active magnet 5 and the passive magnet 62 acts, which in turn rotates the impeller 61 in the passive rotor assembly 6, driving the circulation of the coolant 3. This simplifies the structure and reduces mechanical friction. Furthermore, due to the characteristics of magnetic drive, the entire cooling system operates more smoothly, with lower noise, and improved cooling efficiency.

[0039] In one embodiment, the stator assembly 410 includes a bracket 411, and the end of the bracket 411 facing the heat-insulating and light-transmitting plate 2 is connected to a circuit board 412, and the end surface of the circuit board 412 away from the bracket 411 is connected to a coil 413, and the rotating shaft 430 is arranged in the middle of the coil 413.

[0040] The circuit board 412 is the core component of the drive motor 4, responsible for receiving external power signals and converting them into a current suitable for motor operation. Precise control of the circuit board 412 ensures stable motor operation and uniform flow of the coolant 3. The circuit board 412 is connected to the bracket 411. Considering heat dissipation requirements, the bracket 411 is made of a metal with excellent thermal conductivity to help the circuit board 412 quickly dissipate heat generated during operation, ensuring its stability and extending its service life.

[0041] Rotating shaft 430 passes through the middle of coil 413. Rotating shaft 430 rotates relative to coil 413 and is fixedly connected to active rotor assembly 420, thereby enabling relative rotation between stator assembly 410 and active rotor assembly 420. Rotating shaft 430, as a key component connecting stator assembly 410 and active rotor assembly 420, balances strength and flexibility.

[0042] In one embodiment, the active rotor assembly 420 includes an annular soft magnet 421, which is sleeved on the outside of the coil 413. A motor housing 422 is fixedly sleeved on the outside of the annular soft magnet 421, and the motor housing 422 is fixedly connected to the rotating shaft 430.

[0043] Motor housing 422 not only provides a protective enclosure for the entire motor but also serves to secure and support it. The fixed connection between motor housing 422 and shaft 430 ensures stable rotation of active rotor assembly 420. The material selection for motor housing 422 also considers a balance between heat dissipation and weight, achieving optimal cooling and mechanical strength.

[0044] Under electric drive, the coil 413 undergoes periodic magnetic field changes and acts on the annular soft magnet 421, forming a magneto-electrodynamic rotational torque, which drives the annular soft magnet 421 to rotate around the central axis of the entire structure with the motor housing 422 and the active magnet 5.

[0045] In one embodiment, a boss 423 is provided on one end of the motor housing 422 facing the heat-insulating and light-transmitting plate 2, and the boss 423 is fixedly connected to the active magnet 5. The boss 423 strengthens the connection between the motor housing 422 and the active magnet 5, thereby improving the structural stability of the entire motor assembly.

[0046] In one embodiment, a temperature sensor and a controller are further included, and the temperature sensor and the controller are electrically connected to the circuit board 412 respectively.

[0047] A temperature sensor monitors the temperature outside the heat-insulating and light-transmitting panel 2 in real time. When the temperature exceeds a preset safety threshold, the sensor transmits a signal to the controller. Upon receiving the temperature sensor signal, the controller adjusts the motor's operating state according to pre-set control logic. Specifically, it changes the speed by varying the voltage, which in turn changes the flow rate of the coolant 3 to regulate heat dissipation.

[0048] The temperature monitoring and control mechanism ensures the stability and safety of the motor under various working conditions, extends the service life of the motor, and improves the reliability of the system.

[0049] In one embodiment, a radiator is provided on one side of the heat-insulating and light-transmitting plate 2 , and the radiator is in communication with the coolant 3 for conducting the heat of the coolant 3 to the outside.

[0050] The radiator is made of metal, such as aluminum or copper. In LCD liquid cooling systems, the radiator has a large surface area to increase contact with the air, thereby improving heat dissipation efficiency. Furthermore, the radiator's shape and layout ensure smooth flow of coolant 3, allowing heat to be evenly dissipated from the radiator's surface.

[0051] In another embodiment, the coolant circulates through the LCD area, the water pump area, the external heat dissipation area, and the recirculation area in sequence during operation. The LCD area is the area where the LCD is in contact with the coolant, the external heat dissipation area is the area where the radiator is in contact with the coolant, and the recirculation area is a flow channel provided in the structure to allow the coolant to flow back to the LCD area.

[0052] Coolant 3 passes through LCD1, removing heat from the screen. Driven by the water pump, it passes through the small holes in the water pump area, passing through the passive rotor structure, and flows to the external heat dissipation area of ​​the LCD heat dissipation structure. Pressure forces the coolant 3 to flow to both sides, then to the recirculation area, re-passing LCD1 to complete the internal circulation. While in the lower layer, the coolant 3 transfers heat to the closely connected radiator, ensuring that the coolant 3 flowing through LCD1 after recirculation is at a low temperature.

[0053] In one embodiment, the heat-insulating light-transmitting plate 2 is a heat-insulating glass plate or a Fresnel lens.

[0054] The use of insulating glass or Fresnel lenses provides an effective heat-insulating and light-transmitting solution, ensuring that the LCD is not affected by external heat during operation. Insulating glass effectively blocks heat transfer while maintaining good light transmittance. Fresnel lenses, on the other hand, utilize their unique refractive principles to focus light, achieving efficient light transmission and heat insulation without significantly increasing thickness.

[0055] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A liquid cooling heat dissipation structure for LCD used in a projector, characterized in that: include: An LCD (1) and a heat-insulating light-transmitting plate (2), wherein one end surface of the LCD (1) is sealedly connected to the heat-insulating light-transmitting plate (2), and a cooling liquid (3) is filled between the LCD (1) and the heat-insulating light-transmitting plate (2); a drive motor (4), the drive motor (4) being arranged on an end surface of the heat-insulating and light-transmitting plate (2) away from the LCD (1), a drive end of the drive motor (4) being fixedly connected to a cylindrical active magnet (5), an end of the active magnet (5) away from the drive motor (4) being directed toward the heat-insulating and light-transmitting plate (2); A passive rotor assembly (6) is disposed in the coolant (3), and the passive rotor assembly (6) includes a blade (612) and a cylindrical passive magnet (62), wherein the passive magnet (62) and the active magnet (5) are coaxially disposed so that the blade (612) rotates synchronously with the passive magnet (62) and the active magnet (5).

2. The LCD liquid cooling heat dissipation structure for a projector according to claim 1, characterized in that: The passive rotor assembly (6) comprises an impeller (61), the impeller (61) being provided with a hub (611) and the blades (612), the blades (612) being fixedly arranged on the outside of the hub (611), the passive magnet (62) being embedded in the hub (611), and the hub (611) and the passive magnet (62) being coaxially arranged.

3. The LCD liquid cooling and heat dissipation structure for a projector according to claim 1, characterized in that: The driving motor (4) comprises a stator assembly (410) and an active rotor assembly (420), wherein the active rotor assembly (420) is sleeved on the outside of the stator assembly (410), and the active rotor assembly (420) is rotatably connected to the stator assembly (410) via a rotating shaft (430).

4. The LCD liquid cooling and heat dissipation structure for a projector according to claim 3, characterized in that: The stator assembly (410) comprises a bracket (411), one end of the bracket (411) facing the heat-insulating light-transmitting plate (2) is connected to a circuit board (412), an end surface of the circuit board (412) away from the bracket (411) is connected to a coil (413), and the rotating shaft (430) is arranged through the middle of the coil (413).

5. The LCD liquid cooling and heat dissipation structure for a projector according to claim 4, characterized in that: The active rotor assembly (420) comprises an annular soft magnet (421), the annular soft magnet (421) being sleeved on the outside of the coil (413), a motor housing (422) being fixedly sleeved on the outside of the annular soft magnet (421), and the motor housing (422) being fixedly connected to an end of the rotating shaft (430) away from the circuit board (412).

6. The LCD liquid cooling and heat dissipation structure for a projector according to claim 5, characterized in that: A boss (423) is provided on one end of the motor housing (422) facing the heat-insulating light-transmitting plate (2), and the boss (423) is fixedly connected to the active magnet (5).

7. The LCD liquid cooling and heat dissipation structure for a projector according to claim 4, characterized in that: It also includes a temperature sensor and a controller, and the temperature sensor and the controller are electrically connected to the circuit board (412) respectively.

8. The LCD liquid cooling and heat dissipation structure for a projector according to claim 1, characterized in that: A radiator is provided on one side of the LCD (1), and the radiator is in communication with the cooling liquid (3) and is used to conduct heat of the cooling liquid (3) to the outside.

9. The LCD liquid cooling and heat dissipation structure for a projector according to claim 1, characterized in that: The heat-insulating light-transmitting plate (2) is a heat-insulating glass plate or a Fresnel lens.

Images