Novel structure of projection light path

Abstract

The utility model discloses a novel structure of a projection light path, which comprises a shell, a light source, a lens device and an LCD (liquid crystal display) module, the lens device and the LCD module are arranged in the shell, the light source and the LCD module are respectively positioned on two sides of the lens device, the lens device comprises a first plano-convex lens and a second plano-convex lens which are arranged in parallel, and the first plano-convex lens and the second plano-convex lens are arranged in parallel. The outer diameter of the first plano-convex mirror is larger than that of the second plano-convex mirror, and the second plano-convex mirror is located between the first plano-convex mirror and the light source. The lens device is arranged and comprises the first plano-convex lens and the second plano-convex lens, light emitted by the light source can be converged and collected through the second plano-convex lens, the light receiving rate of light rays is greatly improved, and the loss amount of the light rays is greatly reduced; and the light passing through the second plano-convex mirror can better act on the LCD module through the convergence effect of the first plano-convex mirror, so that the definition and the brightness of a finally projected image are improved.

Description

Technical Field

[0001] The utility model belongs to a projection optical path structure, in particular to a new projection optical path structure. Background Art

[0002] When the projection light path is in use, the light emitted by the LED lamp group is projected onto the screen. In the existing commonly used optical light-collecting system, a separate first plano-convex mirror is set. Due to the needs of the light path and heat, it is far away from the LED light source. At this time, the light is absorbed and scattered by the lens bracket wall and scattered around the first plano-convex mirror. As a result, too much light is lost, which makes the brightness of the light spot formed on the LCD screen greatly reduced, and the low-brightness part of the edge of the light spot is significantly enlarged. Finally, the brightness of the projected image is uneven and reduced, especially the edge clarity is reduced, and the overall effect of the equipment is poor. Utility Model Content

[0003] The purpose of the present utility model is to provide a new projection light path structure that can solve at least one of the above problems.

[0004] According to one aspect of the present invention, a new structure of a projection light path is provided, including a shell, a light source, a lens device and an LCD module. The lens device and the LCD module are both arranged in the shell, and the light source and the LCD module are respectively located on both sides of the lens device. The lens device includes a first plano-convex mirror and a second plano-convex mirror arranged in parallel. The outer diameter of the first plano-convex mirror is larger than the outer diameter of the second plano-convex mirror, and the second plano-convex mirror is located between the first plano-convex mirror and the light source.

[0005] The beneficial effects of the present invention are as follows: by providing a lens device, including a first plano-convex mirror and a second plano-convex mirror, the light emitted by the light source can be converged and collected by the second plano-convex mirror, which greatly improves the light collection rate and greatly reduces the amount of light loss; the light after passing through the second plano-convex mirror is then converged by the first plano-convex mirror, and can better act on the LCD module, thereby improving the clarity and brightness of the image formed by the light transmitted from the LCD screen.

[0006] In some embodiments, the lens device further comprises a lens holder, wherein the lens holder is provided with a housing cavity, wherein the housing cavity is provided with a mounting plate, wherein the inner wall of the housing cavity is provided with a first mounting position, wherein the mounting plate is provided with a second mounting position, wherein the first mounting position is located on one side of the second mounting position, wherein the lens holder, the mounting plate, the first mounting position, and the second mounting position are integrally formed, wherein the first plano-convex mirror is provided on the first mounting position, wherein the second plano-convex mirror is provided on the second mounting position, wherein the light source is located at the rear end of the lens holder, and wherein the lens holder is fixed within the housing. Thus, since the lens holder and the various structural elements within the lens holder are integrally formed, when installing the lens, there is no need to reassemble multiple holders, thereby improving the processing efficiency of the lens holder and helping to reduce the overall cost; at the same time, by providing the first mounting position and the second mounting position, it is possible to conveniently install a lens corresponding to each mounting position, thereby realizing the installation of two lenses on one lens holder, thereby ensuring the optical path relationship formed by the lenses, simplifying the assembly steps, simplifying the overall processing and assembly process, and simplifying the overall structure.

[0007] In some embodiments, the LCD module includes a front cover, a back cover, a sealing glass, an LCD screen and a sealing gasket. The front cover and the back cover cooperate with each other. The sealing glass is two pieces, and the two pieces of sealing glass are fixed on the front cover and the back cover respectively. The LCD screen is arranged between the front cover and the back cover. A cooling cavity is formed between the front cover and the back cover. The LCD screen is located in the cooling cavity. The sealing gasket is clamped between the front cover and the back cover. A pressure relief liquid bag is provided on the sealing gasket. The pressure relief liquid bag is connected to the cooling cavity. The cooling cavity is loaded with coolant. The front cover and the back cover are fixed in the shell, and the front cover is located on the side away from the lens device. Therefore, by providing a cooling chamber, the LCD screen can be immersed in the coolant, and a large amount of heat accumulated on the surface of the LCD screen can be taken away by the coolant and conducted to the front cover and the back cover for output, effectively avoiding excessive accumulation of heat on the LCD screen, preventing the LCD screen temperature from being too high, keeping it within the normal operating temperature range, improving the heat dissipation efficiency, and improving the safety and stability of equipment use; by providing a pressure relief liquid bag, when the coolant heats up and expands, the pressure relief liquid bag can expand, avoiding the phenomenon of rapid increase in coolant leakage caused by the expansion of the liquid due to rising temperature, ensuring the stability of the pressure in the cooling chamber and the sealing of the coolant, and ensuring the overall service life.

[0008] In some embodiments, a receiving groove is provided on the inner side of the front cover and / or the rear cover, and the pressure relief liquid capsule is located in the receiving groove. Thus, the receiving groove facilitates the installation and placement of the pressure relief liquid capsule and provides corresponding space for the expansion of the pressure relief liquid capsule.

[0009] In some embodiments, the sealing gasket is clamped at the peripheral joint of the front cover and the rear cover, and the pressure relief liquid capsule and the sealing gasket are integrally formed. This facilitates the processing and molding of the pressure relief liquid capsule and ensures that the pressure relief liquid capsule has a certain elasticity.

[0010] In some embodiments, an opening is provided on one side of the pressure relief liquid bag, the opening is connected to the cooling cavity, and a communicating hole is provided on the bottom of the front cover or the rear cover, the communicating hole is connected to the cooling cavity, and the communicating hole is connected to the opening;

[0011] When the opening is located on the side close to the front cover, the communication hole is located on the front cover;

[0012] When the opening is located near the rear cover, the communication hole is located on the rear cover. Thus, the communication hole facilitates the coolant in the cooling chamber to flow into the pressure relief liquid bag, and the coolant in the pressure relief liquid bag to flow back into the cooling chamber.

[0013] In some embodiments, a reflector is provided on the other side of the mounting plate, with a light hole defined in the reflector. The light hole corresponds to the second plano-convex mirror, and the light source is mounted in the light hole. Thus, the reflector facilitates the installation of the light source, allowing light passing through the reflector to directly impact the second plano-convex mirror in the second mounting position, thereby improving light efficiency.

[0014] In some embodiments, the novel projection light path structure further includes a heat-insulating glass plate and a rear mirror, wherein the heat-insulating glass plate is located between the lens assembly and the LCD module, and the rear mirror is located in front of the LCD module, thereby making the light more uniform.

[0015] In some embodiments, the novel projection light path structure further includes a control mainboard, which is disposed outside the housing and electrically connected to the light source. Thus, the control mainboard facilitates control of the light source.

[0016] In some embodiments, the novel projection optical path structure further includes a cooling duct and a heat dissipation fan. The cooling duct is located on the outside of the front and rear covers and contacts the front and rear covers. The cooling duct extends to the outside of the housing. The heat dissipation fan is fixed to the outside of the housing and positioned opposite the cooling duct. Thus, the provision of the cooling duct and heat dissipation fan accelerates the dissipation of heat from the front and rear covers, effectively reducing local temperatures and improving heat dissipation efficiency, further preventing overheating of the LCD screen. Furthermore, the heat dissipation fan utilizes direct convection to draw cooler air from the outside of the device to dissipate heat from the LCD module and housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the new projection light path structure of the utility model.

[0018] Figure 2 It is a schematic cross-sectional view of the novel projection optical path structure of the present utility model.

[0019] Figure 3 The utility model is a schematic diagram of the lens support structure of the lens device in the novel projection light path structure.

[0020] Figure 4 yes Figure 3 Schematic diagram of the structure from another perspective.

[0021] Figure 5 yes Figure 3 Schematic diagram of the cross-sectional structure.

[0022] Figure 6 It is a structural schematic diagram of the LCD module in the novel projection light path structure of the utility model.

[0023] Figure 7 yes Figure 6 Schematic diagram of the explosion structure.

[0024] Figure 8 This is a schematic diagram of the main structure of the LCD module in the new projection light path structure of the present invention.

[0025] Figure 9 yes Figure 8 Schematic diagram of the cross-sectional structure of AA.

[0026] Figure 10 yes Figure 8 Schematic diagram of the cross-sectional structure of BB.

[0027] Figure 11 It is a structural schematic diagram of the pressure relief liquid bag of the LCD module in the novel projection optical path structure of the utility model.

[0028] Figure 12 yes Figure 11 Schematic diagram of the cross-sectional structure. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to the accompanying drawings.

[0030] Reference Figure 1 and Figure 2 The novel projection optical path structure includes a housing 1, a light source 2, a lens assembly 3, and an LCD module 4. The lens assembly 3 and the LCD module 4 are both disposed within the housing 1. The light source 2 and the LCD module 4 are located on either side of the lens assembly 3. The lens assembly 3 includes a first plano-convex mirror 31 and a second plano-convex mirror 32 disposed in parallel. The outer diameter of the first plano-convex mirror 31 is larger than that of the second plano-convex mirror 32. The second plano-convex mirror 32 is located between the first plano-convex mirror 31 and the light source 2. The light source 2 can be an LED light source or other alternative light source. The second plano-convex mirror 32 protrudes toward the first plano-convex mirror 31, and the first plano-convex mirror 31 protrudes toward the LCD module 4.

[0031] During installation, the axis of the lens device 3 and the axis of the LCD module 4 can be kept in a straight line, which is beneficial to improving the uniformity of light.

[0032] During use, light from the light source 2 is initially converged by the second plano-convex mirror 32, then acts on the first plano-convex mirror 31, passes through the first plano-convex mirror 31, and then exits through the LCD module 4. The provision of the second plano-convex mirror 32 allows the second plano-convex mirror 32 to be placed closer to the light source 2, thereby enabling the light emitted by the light source 2 to be better converged by the second plano-convex mirror 32. This improves the light collection efficiency of the entire lens device 3, significantly improving the light collection effect compared to a single lens, and significantly reducing the amount of light loss.

[0033] like Figures 2 to 5 As shown, the lens device 3 also includes a lens bracket 33, a accommodating cavity 331 is provided in the lens bracket 33, a mounting plate 332 is provided in the accommodating cavity 331, a first mounting position 333 is provided on the inner wall of the accommodating cavity 331, a second mounting position 334 is provided on the mounting plate 332, the first mounting position 333 is located on one side of the second mounting position 334, the lens bracket 33, the mounting plate 332, the first mounting position 333 and the second mounting position 334 are an integrally formed structure, the first plano-convex mirror 31 is provided on the first mounting position 333, the second plano-convex mirror 32 is provided on the second mounting position 334, the light source 2 is located at the tail end of the lens bracket 33, and the lens bracket 33 is fixed in the shell 1.

[0034] The first mounting position 333 is a mounting step. A through hole 3321 is provided on the mounting plate 332 . The through hole 3321 forms a second mounting position 334 . The aperture of the first mounting position 333 is larger than that of the second mounting position 334 .

[0035] When installing the second plano-convex mirror 32, it can be installed directly opposite the through-hole 3321. The mounting plate 332 positioned around the outer periphery of the through-hole 3321 limits the periphery of the second plano-convex mirror 32, thereby facilitating installation of the second plano-convex mirror 32 at the second mounting position 334. When installing the first plano-convex mirror 31, the first plano-convex mirror 31 is positioned within the accommodating cavity 331. The first mounting position 333 limits the periphery of the first plano-convex mirror 31, thereby facilitating installation of the first plano-convex mirror 31 at the first mounting position 333.

[0036] A limiting buckle 337 is provided on the mounting plate 332 , and the limiting buckle 337 is located at the outer periphery of the second mounting position 334 .

[0037] The second mounting position 334 is formed with vertical edges 34 perpendicular to the mounting plate 332. A retaining clip 337 is positioned between adjacent vertical edges 34. The width of the retaining clip 337 is smaller than the width of the vertical edges 34. When the second plano-convex mirror 32 is installed at the second mounting position 334, the vertical edges 34 provide a certain degree of positional retention for the periphery of the second plano-convex mirror 32. The retaining clip 337 is tilted toward the through hole 3321, thereby pressing the second plano-convex mirror 32 firmly and preventing it from falling off after installation.

[0038] In actual use, the limiting buckle 337 can be of other shapes, which can press the second plano-convex mirror 32 toward the side of the through hole 3321 to fix the second plano-convex mirror 32.

[0039] Therefore, the second plano-convex mirror 32 is fixed by mechanical means, which is simple, convenient, and quick to install. It eliminates the need to seal the second plano-convex mirror 32 on the bracket with high-temperature sealant and eliminates the gluing process. Since the second plano-convex mirror 32 works at high temperature for a long time, the sealant used is prone to aging and falling off, which seriously affects the service life of the equipment. Therefore, the mechanical fixation method of the limit buckle 337 is adopted to greatly reduce this risk, indirectly save the use of high-temperature glue, and reduce production costs.

[0040] The sidewall of the lens holder 33 is provided with a first fixing hole 338, which is located in front of the first mounting position 333. The first mounting position 333 is located between the first fixing hole 338 and the second mounting position 334. Therefore, after the first plano-convex mirror 31 is properly mounted on the first mounting position 333, the external positioning screw passes through the first fixing hole 338, pressing the front end surface of the first plano-convex mirror 31. The positioning screw and the first mounting position 333 act together to secure the first plano-convex mirror 31. There are at least two, and may be three or more, first fixing holes 338, which can be increased or decreased based on specific requirements. The first fixing holes 338 are evenly distributed on the sidewall of the lens holder 33. Therefore, a relatively large optical device such as the first plano-convex mirror 31 can be positioned and locked by a relatively small locking force, and the position of the large-mass device such as the first plano-convex mirror 31 can be prevented from changing during use, so that the lens is not easy to loosen or slip, thereby ensuring that the optical path relationship of the workpiece remains fixed during use, and the performance reliability is greatly improved. Similarly, the use of high-temperature adhesive and the process are saved, the production cycle is shortened, and the overall installation process and efficiency are relatively simplified.

[0041] In actual use, the distance between the first and second mounting positions can be adjusted during the molding of the lens holder 33, thereby adjusting the distance between the two lenses to meet different optical path usage requirements. The two lenses in the lens holder 33 are fixed by a mechanical structure, which facilitates the removal and replacement of the corresponding lenses.

[0042] A reflector cup 335 is provided on the other side of the mounting plate 332. A light hole 336 is defined in the reflector cup 335, which corresponds to the second plano-convex mirror 32. The light source 2 is mounted at the light hole 336. The reflector cup 335 and the mounting plate 332 are integrally formed. To enhance the light-focusing effect of the reflector cup 335, the reflector cup 335 is tapered. The size of the reflector cup 335 can be increased or decreased depending on the size and power of the actual light source assembly.

[0043] During actual use, a reflective cup made of other materials with higher reflectivity can be installed on the inner side of the reflective cup 335. The upper edge of the reflective cup can be located at the second installation position. The second plano-convex mirror 32 can press the reflective cup during installation, thereby further improving the projection utilization rate, light collection rate and reflectivity.

[0044] By providing a reflective cup 335, the large end of the reflective cup 335 is close to the through hole 3321, and the external light-emitting lamp group is installed on the outside of the small end of the reflective cup 335. The light passes through the light hole 181 and can be converged by the reflective cup 335 to improve the light collection rate, and then emitted through the lens to meet the use requirements.

[0045] The mounting plate 332 is provided with a second fixing hole 35. Through the second fixing hole 35, an external fixing screw can be conveniently passed through the second fixing hole 35 and then locked and fixed with other structures, thereby facilitating the installation of the entire lens bracket.

[0046] When the light-emitting lamp group on one side of the reflective cup 335 needs to be replaced with a light-emitting device of different specifications or power, since the two lenses in the lens holder 33 are fixed by a mechanical structure, after loosening the corresponding screws or structures, taking out the lenses, and taking out the fixing screws at the second fixing hole 35, the lens holder 33 can be taken out to facilitate replacement of related components.

[0047] A wire outlet hole 36 is provided on one side of the bottom end of the lens bracket 33. Therefore, the wire outlet hole 36 is provided to facilitate the wiring of the light-emitting element through the wire outlet hole 36, play a guiding role, facilitate the routing of the wires, avoid the mess of the wires, and improve the simplicity.

[0048] like Figure 2 、 Figures 6-12As shown, the LCD module 4 includes a front cover 41, a rear cover 42, a sealing glass 43, an LCD screen 44, and a sealing gasket 45. The front cover 41 and the rear cover 42 cooperate with each other. The sealing glass 43 is composed of two pieces, each fixed to the front cover 41 and the rear cover 42. The LCD screen 44 is disposed between the front cover 41 and the rear cover 42, forming a cooling cavity 46 between the front cover 41 and the rear cover 42. The LCD screen 44 is located within the cooling cavity 46. The sealing gasket 45 is clamped between the front cover 41 and the rear cover 42. A pressure relief liquid capsule 451 is provided on the sealing gasket 45, communicating with the cooling cavity 46. The cooling cavity 46 is filled with coolant. The front cover 41 and the rear cover 42 are fixed within the housing 1, with the front cover 41 located on the side away from the lens assembly 3. The coolant is conventional transparent cooling oil, which does not affect the light transmission effect of the LCD screen 44. The front cover 41 and the back cover 42 can be made of a conventional alloy metal with high thermal conductivity and high rigidity, which can quickly conduct the heat of the coolant and increase the cooling speed of the entire coolant, thereby preventing the entire LCD module 4 from overheating during use.

[0049] When installing LCD screen 44, the bottom of the frame of LCD screen 44 can be bonded to the inside of front cover 41 or rear cover 42. Then, sealing gasket 45 is placed at the mating point between front cover 41 and rear cover 42, and the front and rear covers 41 and 42 are secured with screws. A cavity is formed between front cover 41 and rear cover 42, facilitating the installation of LCD screen 44 and the layout of cooling cavity 46. Sealing gasket 45 seals the coolant in cooling cavity 46, preventing it from leaking.

[0050] In actual use, in order for the coolant to better remove the heat from the LCD screen 44, the width of the LCD screen 44 is smaller than the width of the accommodating cavity, so that the left and right sides of the LCD screen 44 are also located in the coolant, that is, the entire LCD screen 44 is immersed in the coolant. As a result, the large amount of heat accumulated on the surface of the LCD screen can be conducted out through the coolant around the entire periphery of the LCD screen 44, and conducted to the front cover 41 and the rear cover 42, and then dissipated through the front cover 41 and the rear cover 42. In order to improve the heat dissipation efficiency of the front cover 41 and the rear cover 42, the front cover 41 and the rear cover 42 are made of metal to improve the heat conduction efficiency and facilitate the rapid dissipation of heat; and a cooling fan or an external cooling pipe can be installed on the outside of the entire module to facilitate the rapid removal of heat from the module.

[0051] The cooling effect of the coolant in the cooling chamber 46 can promptly remove the heat from the LCD screen 44, allowing the LCD screen to maintain a normal operating temperature range, not exceeding 70°C, thereby extending the service life of the LCD screen. The shapes of the front cover, back cover, and LCD screen can be adjusted according to actual usage requirements and can be square, circular, or polygonal, etc., to meet the requirements of different usage scenarios.

[0052] When assembling, the front cover 41 and the rear cover 42 are locked and fixed at the four top corners of the two by sealing screws 49; in order to ensure the sealing effect when the front cover and the rear cover are matched, a sealing rubber ring 30 is installed at the corresponding side cover matching position of the sealing screw 49 to ensure the corresponding sealing effect.

[0053] A receiving groove 47 is provided on the inner side of the front cover 41 and / or the rear cover 42, and the pressure relief bladder 451 is located within the receiving groove 47. The receiving groove 47 can be provided on the inner side of the front cover 41 or the rear cover 42, below the LCD screen 44, or it can be provided on both the front cover 41 and the rear cover 42 to facilitate the placement and installation of the pressure relief bladder 451. To ensure that the pressure relief bladder 451 has sufficient space for expansion when the coolant expands due to heat, the length and width of the receiving groove 47 are correspondingly greater than the length and width of the pressure relief bladder 451.

[0054] The sealing gasket 45 is clamped at the periphery of the front cover 41 and the rear cover 42. The pressure relief sac 451 and the sealing gasket 45 are an integrally formed structure. Among them, the sealing gasket 45 is made of rubber material, and the pressure relief sac 451 has a certain elasticity to meet the deformation requirements of the pressure relief sac 451 under the action of hydraulic pressure.

[0055] The LCD screen 44 generates heat during operation, and the coolant in the cooling chamber takes away the heat. The temperature of the coolant increases due to the heat, and the coolant expands to a certain extent under the action of thermal expansion and contraction. When the coolant expands, the pressure relief liquid capsule 451 is forced to expand outward, making it easier for the coolant to flow to the pressure relief liquid capsule 451 after the heat expansion, thereby avoiding excessive hydraulic pressure in the cooling chamber 46 and avoiding leakage caused by excessive coolant pressure.

[0056] An opening 452 is provided on one side of the pressure relief bladder 451, which communicates with the cooling chamber 46. This connection between the opening 452 and the cooling chamber seals the coolant within the entire module. A communication hole 48 is provided at the bottom of the front cover 41 or the rear cover 42, which communicates with the cooling chamber 46 and the opening 452.

[0057] When the opening 452 is located near the side of the front cover 41 , the communication hole 48 is located on the front cover 41 ;

[0058] When the opening 452 is located close to the rear cover 42 , the communication hole 48 is located on the rear cover 42 .

[0059] Taking the example of an opening 452 on the side close to the front cover 41, the opening of the pressure relief capsule 451 is opposite to the side wall of the front cover 41, so that the side wall of the front cover 41 and the pressure relief capsule 451 form a sac-shaped space. Therefore, when the coolant in the cooling chamber expands due to heat, under the action of hydraulic pressure, the pressure relief capsule 451 is squeezed, and the pressure relief capsule 451 can expand outward, facilitating the coolant to flow into the pressure relief capsule 451 through the connecting hole 48, thereby achieving pressure relief and preventing the coolant from being squeezed out and leaking due to excessive hydraulic pressure in the entire cooling chamber. Conversely, when the coolant cools down, the pressure on the pressure relief capsule 451 gradually decreases, so the pressure relief capsule 451 gradually shrinks, preventing air from infiltrating from the outside to the inside and causing bubbles to form in the coolant, thereby ensuring the light transmission effect of the LCD screen.

[0060] The connecting holes 48 can be one or more, facilitating the flow of coolant from the cooling chamber 46 into the pressure relief bladder 451, or the flow of coolant from the pressure relief bladder 451 into the cooling chamber through the connecting holes 48, thereby facilitating the flow of coolant during expansion or contraction. In actual use, the size of the opening can be adjusted accordingly, and can be reduced to a hole-like size.

[0061] During actual use, in order to ensure that the pressure relief sac 451 can expand and contract normally in the receiving groove 47, a through hole 20 is provided on the side of the receiving groove 47 facing away from the opening 452. The through hole 20 passes through the cover on the corresponding side and is connected to the external atmosphere. The through hole 20 does not affect the sealing effect of the pressure relief sac 451. By providing the through hole 20, the receiving groove 47 is connected to the external atmosphere, so that the air pressure in the receiving groove 47 remains consistent with the external atmospheric pressure. Therefore, the pressure relief sac 451 can expand normally when heated and contract normally when cooled under the action of hydraulic pressure and air pressure. Among them, the through hole 20 can be a circular through hole or a square through hole. While ensuring that the receiving groove 47 is connected to the outside world, it can effectively prevent strong light from directly hitting the surface of the pressure relief sac 451, thereby preventing the local accelerated aging of the pressure relief sac 451.

[0062] The front cover 41 and the back cover 42 are both provided with a card slot 10, and the sealing gasket 45 is inserted into the card slot 10. Thus, the sealing gasket 45 can be pressed tightly between the front cover 41 and the back cover 42 through the card slot 10, and the sealing effect of the sealing gasket 45 is increased.

[0063] A first ridge 453 and a second ridge 454 are respectively provided on both sides of the sealing gasket 45 . The first ridge 453 and the second ridge 454 are both clamped between the front cover 41 and the rear cover 42 and located outside the card slot 10 .

[0064] The other two sides of the sealing gasket 45 are provided with ribs 455 , which abut against the slots 10 on the corresponding sides.

[0065] The gasket 45, first ridge 453, second ridge 454, and rib 455 are integrally injection-molded. The first and second ridges 453 and 454 increase the contact area between the gasket 45 and the front and rear covers, thereby improving sealing performance. The rib 455 locally increases the sealing pressure, enhancing the overall sealing performance of the gasket. The coordination of the various structures of the gasket 45 with the front and rear covers facilitates quick positioning and installation of the gasket, resulting in simple and convenient installation. This eliminates the need for adhesive bonding of the gasket to the front and rear covers, and eliminates the use and application of high-temperature sealant, indirectly saving the use and process of high-temperature glue and reducing production costs.

[0066] A first mounting groove 411 is defined on the inner side of the front cover 41, and a second mounting groove 421 is defined on the inner side of the rear cover 42. One piece of sealing glass 43 is secured within the first mounting groove 411, and the other piece of sealing glass 43 is secured within the second mounting groove 421. The dimensions of the first mounting groove 411 and the second mounting groove 421 are consistent with those of the corresponding sealing glass, facilitating the snap-in installation of the sealing glass. To ensure secure installation of the sealing glass 43, each piece of sealing glass is secured to its corresponding mounting groove using high-temperature sealant, providing a seal and ensuring the stability of the bonding between the sealing glass and the glass.

[0067] The novel projection optical path structure of the present invention also includes an insulating glass plate 5 and a rear mirror 6. The insulating glass plate 5 is located between the lens assembly 3 and the LCD module 4, and the rear mirror 6 is located in front of the LCD module 4. Therefore, light transmitted through the lens assembly 3 passes through the insulating glass plate 5 and then acts on the LCD module 4. The insulating glass plate 5 can improve the uniformity of the projected light. Light emitted from the LCD module 4 passes through the rear mirror 6 before being emitted. The rear mirror 6 can then refocus the light and transmit it outward, thereby improving the brightness and stability of the final image.

[0068] The novel projection optical path structure further includes a control mainboard 7, which is arranged outside the housing 1 and is electrically connected to the light source 2 via a wire. Therefore, when in use, the light source 2 can be turned on and off by the control mainboard 7.

[0069] The new projection optical path structure of the present invention also includes a cooling pipe 8 and a cooling fan 9. The cooling pipe 8 is located on the outside of the front cover 41 and the rear cover 42 and contacts the front cover 41 and the rear cover 42. The cooling pipe 8 extends to the outside of the shell 1. The cooling fan 9 is fixed to the outside of the shell 1 and is arranged opposite to the cooling pipe 8. After the front cover 41 and the rear cover 42 are connected by screws, the cooling pipe can be connected to the screws connecting the two to facilitate heat to the cooling pipe. The cooling pipe can pass through an external coolant, and the heat on the front cover 41 and the rear cover 42 can be quickly taken away by the external coolant, thereby improving the heat dissipation efficiency of the front and rear covers and making the overall heat dissipation effect better. In actual use, in order to better improve the heat dissipation speed of the front cover 41 and the rear cover 42, a cooling fan 9 can be installed on the outside to improve the heat dissipation efficiency of the front cover and the rear cover.

[0070] In the LCD module, the LCD screen 44 is immersed in a coolant, and the coolant can promptly remove the heat from the entire LCD screen 44; the coolant uses the existing high-transparency coolant used to cool display screens, so that the visible light transmittance of the entire module, excluding the LCD screen, and the entire structural frame can be measured and calculated to reach 88.3% to 95.5%, thereby not affecting the use of the entire module.

[0071] To facilitate the installation and fixation of the various structures within the housing 1, the main body of the housing 1 is U-shaped, with a top cover provided on the top. The control motherboard 7 is screwed onto the top cover. The shape of the housing 1 can be adjusted to the actual shapes of the lens assembly 3 and LCD module 4 to meet the requirements of different scenarios. An arcuate groove is formed within the interior of the housing 1, which matches the shape of the lens holder 33 of the lens assembly 3, thereby facilitating the rapid positioning and installation of the lens holder 33 within the housing 1. A groove 11 is formed at the bottom of the housing 1. After the front cover 41 and rear cover 42 of the LCD module 4 are assembled, the bottom can be snapped into the groove 11, allowing the LCD module 4 to be quickly positioned. Furthermore, corresponding slots can be formed on the inner wall of the housing 1, with the insulating glass plate 5 and rear mirror 6 respectively slotted into the corresponding slots for installation and fixation. Finally, the top cover is fixed, thus securing the various structures within the housing 1.

[0072] The above are only preferred embodiments of the present invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A new projection optical path structure, characterized by: The invention comprises a housing (1), a light source (2), a lens device (3) and an LCD module (4), wherein the lens device (3) and the LCD module (4) are both arranged in the housing (1), the light source (2) and the LCD module (4) are respectively located on both sides of the lens device (3), the lens device (3) comprises a first plano-convex mirror (31) and a second plano-convex mirror (32) arranged in parallel, the outer diameter of the first plano-convex mirror (31) is larger than the outer diameter of the second plano-convex mirror (32), the second plano-convex mirror (32) is located between the first plano-convex mirror (31) and the light source (2), the second plano-convex mirror (32) protrudes toward the first plano-convex mirror (31), and the first plano-convex mirror (31) protrudes toward the LCD module (4), the bottom of the housing (1) is formed with a groove (11), and the bottom of the LCD module (4) matches the groove (11).

2. The novel projection optical path structure according to claim 1, characterized in that: The lens device (3) further comprises a lens bracket (33), wherein a receiving cavity (331) is provided in the lens bracket (33), a mounting plate (332) is provided in the receiving cavity (331), a first mounting position (333) is provided on the inner wall of the receiving cavity (331), a second mounting position (334) is provided on the mounting plate (332), the first mounting position (333) is located on one side of the second mounting position (334), the lens bracket (33), the mounting plate (332), the first mounting position (333) and the second mounting position (334) are an integrally formed structure, the first plano-convex mirror (31) is provided on the first mounting position (333), the second plano-convex mirror (32) is provided on the second mounting position (334), the light source (2) is located at the rear end of the lens bracket (33), and the lens bracket (33) is fixed in the housing (1).

3. The novel projection optical path structure according to claim 1, characterized in that: The LCD module (4) comprises a front cover (41), a back cover (42), a sealing glass (43), an LCD screen (44) and a sealing gasket (45). The front cover (41) and the back cover (42) are matched with each other. The sealing glass (43) is in two pieces. The two pieces of sealing glass (43) are fixed on the front cover (41) and the back cover (42) respectively. The LCD screen (44) is arranged between the front cover (41) and the back cover (42). A cooling cavity (46) is provided, wherein the LCD screen (44) is located in the cooling cavity (46), the sealing gasket (45) is clamped between the front cover (41) and the rear cover (42), a pressure relief liquid capsule (451) is provided on the sealing gasket (45), the pressure relief liquid capsule (451) is communicated with the cooling cavity (46), and the cooling cavity (46) is loaded with cooling liquid, the front cover (41) and the rear cover (42) are fixed in the housing (1), and the front cover (41) is located on a side away from the lens device (3).

4. The novel projection optical path structure according to claim 3, characterized in that: An accommodating groove (47) is provided on the inner side of the front cover (41) and / or the rear cover (42), and the pressure relief liquid bag (451) is located in the accommodating groove (47).

5. The novel projection optical path structure according to claim 4, characterized in that: The sealing gasket (45) is clamped at the peripheral matching position of the front cover (41) and the rear cover (42), and the pressure relief liquid bag (451) and the sealing gasket (45) are an integrally formed structure.

6. The novel projection optical path structure according to claim 5, characterized in that: An opening (452) is provided on one side of the pressure relief liquid bag (451), and the opening (452) is communicated with the cooling cavity (46); a communicating hole (48) is provided on the bottom of the front cover (41) or the rear cover (42), and the communicating hole (48) is communicated with the cooling cavity (46), and the communicating hole (48) is communicated with the opening (452); When the opening (452) is located on a side close to the front cover (41), the communication hole (48) is located on the front cover (41); When the opening (452) is located close to the side of the rear cover (42), the communication hole (48) is located on the rear cover (42).

7. The novel projection optical path structure according to claim 2, characterized in that: A reflective cup (335) is provided on the other side of the mounting plate (332), a light-through hole (336) is provided on the reflective cup (335), the light-through hole (336) corresponds to the second plano-convex mirror (32), and the light source (2) is mounted at the light-through hole (336).

8. The novel projection optical path structure according to any one of claims 1 to 7, characterized in that: It also includes a heat-insulating glass plate (5) and a rear mirror (6), wherein the heat-insulating glass plate (5) is located between the lens device (3) and the LCD module (4), and the rear mirror (6) is located on the front side of the LCD module (4).

9. The novel projection optical path structure according to claim 8, characterized in that: It also includes a control mainboard (7), which is arranged outside the housing (1) and is electrically connected to the light source (2).

10. The novel projection optical path structure according to any one of claims 3 to 6, characterized in that: The invention also includes a cooling pipe (8) and a heat dissipation fan (9). The cooling pipe (8) is located outside the front cover (41) and the rear cover (42) and contacts the front cover (41) and the rear cover (42). The cooling pipe (8) extends to the outside of the shell (1). The heat dissipation fan (9) is fixed on the outside of the shell (1) and is arranged opposite to the cooling pipe (8).

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