Novel structure of projection light path

Abstract

A projection light path novel structure disclosed by the present invention comprises 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, the light source and the LCD module are respectively located at 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, the outer diameter of the first plano-convex lens is greater than the outer diameter of the second plano-convex lens, and the first plano-convex lens and the second plano-convex lens are arranged in parallel. 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 invention belongs to a projection optical path structure, and in particular relates to a new projection optical path structure. Background Art

[0002] When the projection optical 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 arranged. Due to the needs of the optical path and the heat relationship, the light 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 at 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 not good. Summary of the invention

[0003] The object of the present invention is to provide a new projection optical path structure that can solve at least one of the above problems.

[0004] According to one aspect of the present invention, a novel structure of a projection optical path is provided, comprising a shell, a light source, a lens device and an LCD module, wherein 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, and the lens device comprises a first plano-convex mirror and a second plano-convex mirror which are arranged in parallel, wherein 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, and the second plano-convex mirror protrudes toward one side of the first plano-convex mirror, and the first plano-convex mirror protrudes toward one side of the LCD module, and a groove is formed at the bottom of the shell, and the bottom of the LCD module matches the groove.

[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; by providing a groove at the bottom of the shell, the LCD module can be quickly positioned and installed in the shell.

[0006] In some embodiments, the lens device further comprises a lens holder, a receiving cavity is provided in the lens holder, a mounting plate is provided in the receiving cavity, a first mounting position is provided on the inner wall of the receiving cavity, a second mounting position is provided on the mounting plate, the first mounting position is located on one side of the second mounting position, the lens holder, the mounting plate, the first mounting position and the second mounting position are an integrated structure, the first plano-convex mirror is provided on the first mounting position, the second plano-convex mirror is provided on the second mounting position, the light source is located at the rear end of the lens holder, and the lens holder is fixed in the shell. Thus, by making the lens holder and the structural elements in the lens holder an integrated structure, when installing the lens, it is not necessary to reassemble multiple holders, which improves the processing efficiency of the lens holder and helps to reduce the overall cost; at the same time, by providing the first mounting position and the second mounting position, it is convenient to install the lens correspondingly on each mounting position, realize the installation of two lenses on one lens holder, the optical path relationship formed by the lens can be guaranteed, the assembly steps are simplified, the overall processing and assembly process is simplified, and the overall structure is simple.

[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 cooperates with the back cover. 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 rear cover for output, effectively avoiding excessive accumulation of heat on the LCD screen, preventing the LCD screen from being too hot, 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 due to 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 pad is clamped at the peripheral matching position of the front cover and the rear cover, and the pressure relief liquid capsule and the sealing pad are an integrally formed structure, thereby facilitating the processing and forming of the pressure relief liquid capsule and ensuring 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, a communicating hole is provided at 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 near the side of 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, by providing the communication hole, the coolant in the cooling cavity can flow into the pressure relief liquid bag, and the coolant in the pressure relief liquid bag can flow back into the cooling cavity.

[0013] In some embodiments, a reflective cup is provided on the other side of the mounting plate, and a light hole is provided on the reflective cup, and the light hole corresponds to the second plano-convex mirror, and the light source is installed at the light hole. Thus, by providing the reflective cup, the installation of the light source can be facilitated, so that the light passes through the reflective cup and directly acts on the second plano-convex mirror on the second mounting position, thereby improving the light effect.

[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 device 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 optical path structure further includes a control mainboard, which is disposed outside the housing and is electrically connected to the light source. Thus, the control mainboard can facilitate the control of the light source.

[0016] In some embodiments, the new projection optical path structure further includes a cooling pipe and a heat dissipation fan. The cooling pipe is located on the outside of the front cover and the rear cover and contacts the front cover and the rear cover. The cooling pipe extends to the outside of the shell. The heat dissipation fan is fixed on the outside of the shell and arranged opposite to the cooling pipe. Thus, by providing the cooling pipe and the heat dissipation fan, the heat dissipation on the front cover and the rear cover can be accelerated, so that the local temperature can be more effectively reduced, the heat dissipation efficiency can be improved, and the overheating of the LCD screen can be further avoided. At the same time, the heat fan adopts a direct convection method to dissipate the heat of the LCD module and the shell by absorbing the air with a lower temperature outside the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the novel structure of the projection optical path of the present invention.

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

[0019] Figure 3 It is a schematic diagram of the lens support structure of the lens device in the novel projection light path structure of the present invention.

[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 an LCD module in the novel projection optical path structure of the present invention.

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

[0024] Figure 8 It is a schematic diagram of the main structure of the LCD module in the novel projection optical path structure of the present invention.

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

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

[0027] Fig.11 It is a structural schematic diagram of a pressure relief liquid bag of an LCD module in the novel projection optical path structure of the present invention.

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

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

[0030] Reference Figure 1 and Figure 2 The novel structure of the projection optical path includes a housing 1, a light source 2, a lens device 3 and an LCD module 4. 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 includes 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 light source 2 can be an LED light source or other replaceable light sources; 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 the same straight line, which is beneficial to improving the uniformity of light.

[0032] When in use, the light from the light source 2 is first 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 is emitted through the LCD module 4. By providing the second plano-convex mirror 32, the distance between the second plano-convex mirror 32 and the light source 2 can be made closer, so that the light emitted by the light source 2 can be better converged by the second plano-convex mirror 32, thereby improving the light collection rate of the entire lens device 3, greatly improving the light collection effect compared to a single lens, and greatly reducing the amount of light loss.

[0033] like Figure 2 to Figure 5 As shown, the lens device 3 also includes a lens bracket 33, 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 shell 1.

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

[0035] When the second plano-convex mirror 32 is installed, the second plano-convex mirror 32 can be installed facing the through hole 3321, and the periphery of the second plano-convex mirror 32 is limited by the position of the mounting plate 332 on the periphery of the through hole 3321, that is, it is convenient to install the second plano-convex mirror 32 on the second mounting position 334. When the first plano-convex mirror 31 is installed, the first plano-convex mirror 31 is located in the accommodating cavity 331, and the periphery of the first plano-convex mirror 31 is limited by the first mounting position 333, that is, it is convenient to install the first plano-convex mirror 31 on the first mounting position 333.

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

[0037] The outer periphery of the second mounting position 334 is formed with a vertical edge 34, and the vertical edge 34 is perpendicularly arranged to the mounting plate 332, and the limiting buckle 337 is located between adjacent vertical edges 34. The width of the limiting buckle 337 is smaller than the width of the vertical edge 34, and when the second plano-convex mirror 32 is installed at the second mounting position 334, the vertical edge 34 can play a certain limiting and fixing role on the periphery of the second plano-convex mirror 32; the limiting buckle 337 is inclined to the side of the through hole 3321, and can press the second plano-convex mirror 32 to prevent the second plano-convex mirror 32 from falling off after installation.

[0038] In actual use, the limiting buckle 337 can be in other shapes, which can press the second plano-convex mirror 32 toward one 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, and eliminates the need to seal the second plano-convex mirror 32 on the bracket with high-temperature sealant and the gluing process. Since the second plano-convex mirror 32 works at high temperature for a long time, sealant is used. The glue is easy to age and fall off, which seriously affects the service life of the equipment. Therefore, the mechanical fixing 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 side wall of the lens holder 33 is provided with a first fixing hole 338, which is located at the front side of the first mounting position 333, and the first mounting position 333 is located between the first fixing hole 338 and the second mounting position 334. Therefore, when the first plano-convex mirror 31 is installed in place on the first mounting position 333, the external positioning screw passes through the first fixing hole 338, and the front end surface of the first plano-convex mirror 31 is pressed, so that the first plano-convex mirror 31 is fixed under the joint action of the positioning screw and the first mounting position 333. Among them, there are at least two first fixing holes 338, and can be three or more, which can be increased or decreased according to specific requirements, and the first fixing holes 338 are evenly distributed on the side wall 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 and slip, thereby ensuring that the optical path relationship of the workpiece remains determined during use, and the performance reliability is greatly improved. Similarly, the use of high-temperature adhesive and processes are saved, the production cycle is shortened, and the overall installation process and efficiency are relatively simplified.

[0041] In actual use, when the lens holder 33 is formed, the distance between the first mounting position and the second mounting position can be adjusted accordingly, 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 reflective cup 335 is provided on the other side of the mounting plate 332. A light hole 336 is provided on the reflective cup 335. The light hole 336 corresponds to the second plano-convex mirror 32. The light source 2 is installed at the light hole 336. The reflective cup 335 and the mounting plate 332 are an integrally formed structure. In order to improve the focusing effect of the reflective cup 335, the reflective cup 335 is conical. The size of the reflective cup 335 can be increased or decreased accordingly according to the size or power of the actual light-emitting lamp group.

[0043] In 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 reflective cup can be pressed tightly by the second plano-convex mirror 32 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, it is convenient to pass an external fixing screw through the second fixing hole 35 and then lock and fix it 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 parts.

[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 light-emitting element to be led out through the wire outlet hole 36 when wiring, play a guiding role, facilitate the routing of the wire, avoid the mess of the wire, and improve the simplicity.

[0048] like Figure 2 , Figures 6 to 12 As 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 are matched. The sealing glass 43 is two pieces, and the two sealing glasses 43 are fixed on the front cover 41 and the rear cover 42 respectively. The LCD screen 44 is arranged between the front cover 41 and the rear cover 42. A cooling cavity 46 is formed between the front cover 41 and the rear cover 42. 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 arranged on the sealing gasket 45. The pressure relief liquid capsule 451 is connected to the cooling cavity 46. 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 the side away from the lens device 3. Among them, the cooling liquid is an existing transparent cooling oil, which does not affect the light transmission effect of the LCD screen 44. The front cover 41 and the rear cover 42 can be made of existing alloy metals with high thermal conductivity and strong 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 the LCD screen 44, the bottom of the frame of the LCD screen 44 can be bonded and fixed to the inner side of the front cover 41 or the rear cover 42, and then the sealing gasket 45 is placed at the mating contact point of the front cover 41 and the rear cover 42, and the front cover 41 and the rear cover 42 are locked and fixed by screws. A receiving cavity is formed between the front cover 41 and the rear cover 42, which is convenient for the installation of the LCD screen 44 and the distribution of the cooling cavity 46. The sealing gasket 45 seals the coolant in the cooling cavity 46 to prevent the coolant from leaking out.

[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. Therefore, through the coolant on the entire periphery of the LCD screen 44, a large amount of heat accumulated on the surface of the LCD screen can be guided out 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 module heat.

[0051] The cooling effect of the coolant in the cooling chamber 46 can timely remove the heat of the LCD screen 44, so that the LCD screen can be in a normal operating temperature range, and the operating temperature does not exceed 70° C., thereby increasing the service life of the LCD screen. The shapes of the front cover, the back cover, the LCD screen, etc. can be adjusted according to actual use requirements, and can be square, circular, polygonal, etc., to meet the requirements of different use scenarios.

[0052] When assembling, the front cover 41 and the rear cover 42 are locked and fixed at the four top corners 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] The inner side of the front cover 41 and / or the rear cover 42 is provided with a receiving groove 47, and the pressure relief liquid capsule 451 is located in the receiving groove 47. The receiving groove 47 can be opened on the inner side of the front cover 41 or the rear cover 42, located below the LCD screen 44, or can be opened on both the front cover 41 and the rear cover 42, so as to facilitate the placement and installation of the pressure relief liquid capsule 451. In order to ensure that the pressure relief liquid capsule 451 has sufficient expansion space 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 liquid capsule 451.

[0054] The sealing gasket 45 is clamped at the peripheral joint of the front cover 41 and the rear cover 42, and the pressure relief liquid capsule 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 liquid capsule 451 has a certain elasticity to meet the deformation requirements of the pressure relief liquid capsule 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 due to 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 liquid capsule 451, and the opening 452 is connected to the cooling chamber 46. The opening 452 of the pressure relief liquid capsule 451 is connected to the cooling chamber, so that the coolant in the entire module is in a sealed state. A connecting hole 48 is provided at the bottom of the front cover 41 or the rear cover 42, and the connecting hole 48 is connected to the cooling chamber 46, and the connecting hole 48 is connected to the opening 452;

[0057] When the opening 452 is located close to 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] Now, taking the case where the opening 452 is opened on the side close to the front cover 41 as an example, 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 capsule-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, so that the coolant flows into the pressure relief capsule 451 through the connecting hole 48 to achieve pressure relief, and avoid the coolant being squeezed out and leaked out due to excessive hydraulic pressure in the entire cooling chamber. On the contrary, when the coolant cools down, the pressure on the pressure relief capsule 451 gradually decreases, so the pressure relief capsule 451 gradually shrinks, avoiding the air from penetrating from the outside to the inside to cause bubbles in the coolant, and ensuring the light transmission effect of the LCD screen.

[0060] The connecting hole 48 can be one or more, so that the coolant in the cooling cavity 46 can enter the pressure relief liquid capsule 451, or the coolant in the pressure relief liquid capsule 451 can enter the cooling cavity through the connecting hole 48, so as to facilitate the flow of the 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] In actual use, in order to ensure that the pressure relief liquid capsule 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 penetrates the cover body on the corresponding side, and the through hole 20 is connected to the external atmosphere. The through hole 20 does not affect the sealing effect of the pressure relief liquid capsule 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 is kept consistent with the external atmospheric pressure. Therefore, the pressure relief liquid capsule 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, which can effectively prevent strong light from directly shining on the surface of the pressure relief liquid capsule 451 while ensuring that the receiving groove 47 is connected to the outside world, and avoid local accelerated aging of the pressure relief liquid capsule 451.

[0062] The front cover 41 and the rear 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 between the front cover 41 and the rear cover 42 through the card slot 10, and the sealing effect of the sealing gasket 45 is increased.

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

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

[0065] Among them, the sealing gasket 45, the first convex ridge 453, the second convex ridge 454 and the convex rib 455 are an integral injection molding structure; the first convex ridge 453 and the second convex ridge 454 can increase the contact area between the sealing gasket 45 and the front and rear covers, thereby improving the sealing performance; the convex rib 455 can partially increase the sealing pressure, so that the overall sealing performance of the sealing gasket is improved. Through the coordination of the various structures of the sealing gasket 45 with the front and rear covers, the rapid positioning and installation of the sealing gasket is facilitated, the installation is simple and convenient, and the bonding and fixing of the sealing ring and the front and rear covers is omitted, and the use of high-temperature sealant and the gluing process are omitted, which indirectly saves the use and process of high-temperature glue and reduces the production cost.

[0066] A first mounting groove 411 is provided on the inner side of the front cover 41, and a second mounting groove 421 is provided on the inner side of the rear cover 42. One sealing glass 43 is fixed in the first mounting groove 411, and another sealing glass 43 is fixed in the second mounting groove 421. The sizes of the first mounting groove 411 and the second mounting groove 421 are respectively consistent with the sizes of the corresponding sealing glass, so as to facilitate the insertion and installation of the sealing glass. In order to improve the stability of the installation of the sealing glass 43, each sealing glass is fixed to the corresponding mounting groove by a high-temperature sealant, which plays a sealing role and ensures the stability of the sealing glass bonding.

[0067] The novel projection optical path structure of the present invention further 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 in front of the LCD module 4. Therefore, the light transmitted through the lens device 3 acts on the LCD module 4 after passing through the heat-insulating glass plate 5, and the heat-insulating glass plate 5 can improve the uniformity of the projected light; the light emitted by the LCD module 4 is emitted after passing through the rear mirror 6, so that the light can be gathered again and transmitted outward through the action of the rear mirror 6, so that the brightness and stability of the final image are improved.

[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 control mainboard 7 can control the switching of the light source 2.

[0069] The novel structure of the projection optical path of the present invention also includes a cooling pipe 8 and a heat dissipation 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 heat dissipation fan 9 is fixed on 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 the 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, so that the overall heat dissipation effect is better. In actual use, in order to better improve the heat dissipation speed of the front cover 41 and the rear cover 42, a heat dissipation 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 the coolant, and the heat on the entire LCD screen 44 can be taken away in time by the coolant; the coolant adopts the existing high-transparency coolant used to cool the display screen, so that the visible light transmittance of the entire module, except the LCD screen, can be measured and calculated to reach 88.3-95.5%, thereby not affecting the use of the entire module.

[0071] In order to facilitate the installation and fixation of various structures in the housing 1, the main body of the housing 1 is U-shaped, and a top cover is provided on the top cover, and the control main board 7 is fixed on the top of the top cover by screws. Among them, the shape of the housing 1 can be adjusted accordingly according to the shape of the actual lens device 3 and the LCD module 4 to meet the use requirements of different scenes. An arc groove is formed inside the housing 1, and the arc groove matches the appearance of the lens bracket 33 of the lens device 3, so as to facilitate the rapid positioning and installation of the lens bracket 33 in the housing 1. A groove 11 is formed at the bottom of the housing 1. After the front cover 41 and the rear cover 42 in the LCD module 4 are assembled, the bottom can be inserted into the groove 11, and the LCD module 4 can be quickly positioned through the groove 11. At the same time, corresponding card slots can be formed on the inner wall of the housing 1, and the heat-insulating glass plate 5 and the rear mirror 6 are respectively in the corresponding card slots to achieve installation and fixation. Finally, the top cover is fixed to achieve the fixation of various structures in the housing 1.

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

Claims

1. A new projection optical path structure, characterized in that: 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) which are 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 one side of the first plano-convex mirror (31), and the first plano-convex mirror (31) protrudes toward one side of 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 holder (33), wherein a receiving cavity (331) is provided in the lens holder (33), wherein a mounting plate (332) is provided in the receiving cavity (331), wherein an inner wall of the receiving cavity (331) is provided with a first mounting position (333), wherein a second mounting position (334) is provided on the mounting plate (332), wherein the first mounting position (333) is located on one side of the second mounting position (334), wherein the lens holder (33), the mounting plate (332), the first mounting position (333) and the second mounting position (334) are an integrally formed structure, wherein the first plano-convex mirror (31) is provided on the first mounting position (333), wherein the second plano-convex mirror (32) is provided on the second mounting position (334), wherein the light source (2) is located at the rear end of the lens holder (33), and wherein the lens holder (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 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) are matched with each other. The sealing glass (43) is composed of two pieces. The two pieces of sealing glass (43) are respectively fixed on the front cover (41) and the rear cover (42). The LCD screen (44) is arranged between the front cover (41) and the rear cover (42). A cooling cavity (46), 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 bag (451) is provided on the sealing gasket (45), the pressure relief liquid bag (451) is communicated with the cooling cavity (46), 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 is characterized in that: 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 liquid bag (451) is located in the receiving 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 connected to the cooling chamber (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 connected to the cooling chamber (46); and the communicating hole (48) is connected to 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 comprises 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 comprises a control main board (7), which is arranged on the outside of 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: It also includes a cooling pipe (8) and a heat dissipation fan (9), wherein the cooling pipe (8) is located on the outside of the front cover (41) and the rear cover (42) and is in contact with the front cover (41) and the rear cover (42), and the cooling pipe (8) extends to the outside of the shell (1), and 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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