Water-cooled projection illumination coupling structure

Abstract

The utility model discloses a water-cooled projection illumination coupling structure, which comprises a light source, a shell and a light transmission cylinder, the shell is provided with an incident port, a reflecting port and an emergent port, the position of the shell corresponding to the incident port is connected with the light source, the position of the shell corresponding to the reflecting port is provided with a DMD chip, the shell is internally and obliquely provided with a conversion piece, and the surface of the conversion piece faces the DMD chip; a water-cooling cylinder is arranged between the corresponding exit port of the shell and the light-transmitting cylinder, one end of the water-cooling cylinder is connected with the shell, the water-cooling cylinder is communicated with the interior of the shell through the exit port, the other end of the water-cooling cylinder is connected with the light-transmitting cylinder, and a water-cooling assembly is arranged on the outer wall of the water-cooling cylinder; heat is effectively dissipated through the water cooling cylinder and the water cooling assembly, the problem of heat accumulation in a closed light path is solved, the stable performance of the DMD chip and the optical element is kept, the light path is optimized by adopting the inclined conversion piece, light transmitted to the conversion piece from the incident port of the shell and light beams transmitted to the emergent port from the DMD chip are eccentrically arranged, and the light transmission efficiency is improved. The interference between the light transmitted from the entrance port of the shell to the conversion piece and the light beam transmitted from the DMD chip to the exit port is prevented, so that the light energy utilization rate and the projection resolution are improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of projection structure, specifically a water-cooled projection lighting coupling structure. Background Technology

[0002] The projection illumination coupling structure refers to an optical design or component combination in an optical system used to efficiently transmit and couple the illumination beam to the projection module. It is mainly used to ensure that the light emitted by the light source can illuminate the projection device with high efficiency, uniformity and accuracy, thereby generating a high-quality projected image or light field. This structure is widely used in projectors, 3D scanning, holographic display and other devices.

[0003] The projection structures disclosed in the prior art, such as the "projection device" disclosed in patent document "CN110365956A", are attached... Figure 1 As can be seen, in this technical solution, the light beam emitted by the illumination source passes sequentially through the reflective prism, the DMD module, and the rotatable reflector before finally reaching the projection lens.

[0004] In fact, to prevent external light from interfering with the beam emitted from the lighting source, components such as the lighting source are usually placed in an enclosed space, with openings only when the light is emitted. However, the beam generates heat during transmission, and this heat is difficult to dissipate in an enclosed space. Accumulation of heat in an enclosed space can easily lead to a decrease in the performance and lifespan of the DMD module, as well as deformation of other optical components. Utility Model Content

[0005] The purpose of this invention is to provide a water-cooled projection lighting coupling structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A water-cooled projection lighting coupling structure includes a light source, a housing, and a light-transmitting tube. The housing has an inlet, a reflection port, and an outlet. The housing is connected to the light source at the position corresponding to the inlet. A DMD chip is disposed outside the housing at the position corresponding to the reflection port. A conversion component is disposed obliquely inside the housing, with the surface of the conversion component facing the DMD chip.

[0008] A water-cooled cylinder is provided between the corresponding outlet of the housing and the light-transmitting cylinder. One end of the water-cooled cylinder is connected to the housing, and the water-cooled cylinder communicates with the inside of the housing through the outlet. The other end of the water-cooled cylinder is connected to the light-transmitting cylinder. A water-cooling assembly is provided on the outer wall of the water-cooled cylinder.

[0009] In a further technical solution, the housing includes an incident part and a reflective part, the incident part and the reflective part are interference-fitted, the incident part is provided with a connecting ring, the outer wall of the connecting ring extends outward with a second flange, the connecting ring is inserted into the incident part, the second flange is interference-fitted with the incident part, a step and a first convex lens are provided inside the incident part, one side of the first convex lens abuts against the step, and the other side of the first convex lens abuts against the connecting ring.

[0010] A further technical solution is provided in the housing, wherein the entrance of the stray light elimination cavity corresponds to the stray light reflection path of the DMD chip; the bottom of the stray light elimination cavity is provided with an extinction pattern, which is perpendicular to the direction of the incident light.

[0011] A further technical solution includes a circular groove on the housing corresponding to the outlet position, with multiple bolt holes 1 on the groove wall, and multiple bolt holes 2 on the end of the water-cooled cylinder facing the housing. Bolts are installed between bolt holes 1 and bolt holes 2. A sealing ring is installed between the water-cooled cylinder and the housing, and the sealing ring has several clearance holes for avoiding the bolts. A flange 2 extends outward from the end of the water-cooled cylinder facing the housing, and a sealing groove is provided between the flange 2 and the housing. A sealing ring is installed in the sealing groove.

[0012] A further technical solution is provided where a flange three is provided on the side of the water-cooled cylinder facing the light-transmitting cylinder, a fixing ring is provided between the flange three and the light-transmitting cylinder, the fixing ring has a first groove and a second groove, a first retaining ring is provided between the fixing ring and the light-transmitting cylinder, and a second retaining ring is provided between the fixing ring and the water-cooled cylinder, the first groove engages with the first retaining ring, the second groove engages with the second retaining ring, and the flange three, the fixing ring and the light-transmitting cylinder are connected by bolts.

[0013] In a further technical solution, the fixing ring extends to both sides with flange four and flange five, flange four abuts against the sidewall of flange three, and flange five abuts against the sidewall of the light-transmitting tube.

[0014] In a further technical solution, a convex lens and a plane mirror are provided on the side of the light-transmitting tube away from the water-cooling tube, and the plane mirror is used to prevent dust from entering the light-transmitting tube.

[0015] The beneficial effects of this utility model are:

[0016] This invention uses a light beam emitted from a light source to enter the housing through the entrance port and illuminate an inclined conversion component. The conversion component reflects the light beam to a DMD chip outside the housing's reflection port. The DMD chip modulates the light beam to generate imaging light, which is then output from the housing's exit port. Since the water-cooling cylinder is connected to the housing's exit port, the light beam subsequently enters the water-cooling cylinder and propagates inside. Because a water-cooling component is installed outside the water-cooling cylinder for heat dissipation, the heat of the light beam is reduced during its propagation. The light beam then travels to the light transmission tube and continues to propagate along the optical path to subsequent optical elements.

[0017] This water-cooled projection lighting coupling structure effectively dissipates heat through a water-cooling cylinder and water-cooling components, solving the problem of heat accumulation in a closed optical path, maintaining the stable performance of the DMD chip and optical components, and extending the equipment's lifespan. In addition, the use of an inclined conversion element optimizes the optical path, making the light transmitted from the housing's inlet to the conversion element and the light beam transmitted from the DMD chip to the outlet offset, preventing interference between the light transmitted from the housing's inlet to the conversion element and the light beam transmitted from the DMD chip to the outlet, thereby improving light energy utilization and projection resolution.

[0018] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0019] Figure 1 : Overall structural diagram of this utility model.

[0020] Figure 2 Cross-section of this utility model Figure 1 .

[0021] Figure 3 : Exploded view of this utility model.

[0022] Figure 4 Cross-section of this utility model Figure 2 .

[0023] Reference numerals: 1. Light source; 2. Housing; 21. Incident part; 22. Reflecting part; 3. Light transmission tube; 4. Inlet; 5. Reflecting port; 6. Outlet; 7. DMD chip; 8. Converter; 10. Water-cooled cylinder; 11. Water-cooled assembly; 12. Connecting ring; 13. Flange 1; 14. Step; 15. Convex lens 1; 17. Circular groove; 18. Bolt hole 1; 19. Bolt hole 2; 20. Sealing ring; 23. Clearance hole; 24. Flange 2; 25. Fixing ring; 26. Slot 1; 27. Slot 2; 28. Snap ring 1; 29. ​​Snap ring 2; 32. Convex lens 2; 33. Plane mirror Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0025] Please refer to Figure 1-4 ;

[0026] A water-cooled projection lighting coupling structure includes a light source 1, a housing 2 and a light tube 3. The housing 2 has an inlet 4, a reflection port 5 and an outlet 6. The housing 2 is connected to the light source 1 at the position corresponding to the inlet 4. A DMD chip 7 is arranged on the outside of the housing 2 at the position corresponding to the reflection port 5. A conversion element 8 is inclinedly arranged inside the housing 2, with the surface of the conversion element 8 facing the DMD chip 7.

[0027] A water-cooled cylinder 10 is provided between the outlet 6 and the light-transmitting tube 3 of the housing 2. One end of the water-cooled cylinder 10 is connected to the housing 2 and the water-cooled cylinder 10 communicates with the inside of the housing 2 through the outlet 6. The other end of the water-cooled cylinder 10 is connected to the light-transmitting tube 3. A water-cooling component 11 is provided on the outer wall of the water-cooled cylinder 10.

[0028] It is worth noting that the water-cooling component 11 is a conventional technology in the field, and this embodiment does not limit it. For reference, please refer to the water-cooling jacket alignment component in "CN112501685A A water-cooling jacket alignment component and alignment method".

[0029] Specifically, the light beam is emitted from the light source 1, enters the interior of the housing 2 through the inlet 4, and illuminates the tilted conversion element 8. The conversion element 8 reflects the light beam to the DMD chip 7 outside the reflection port 5 of the housing 2. The DMD chip 7 modulates the light beam to generate imaging light. The modulated light is output from the outlet 6 of the housing 2. Since the water-cooling cylinder 10 is connected to the outlet 6 of the housing 2, the light beam then enters the water-cooling cylinder 10. The light beam is transmitted inside the water-cooling cylinder 10. Since the water-cooling component 11 is provided outside the water-cooling cylinder 10 for heat dissipation, the heat of the light beam can be reduced when it is transmitted from the water-cooling cylinder 10. The light beam is transmitted to the light transmission cylinder 3 and continues to propagate along the optical path to the subsequent optical elements.

[0030] This water-cooled projection lighting coupling structure effectively dissipates heat through the water-cooling cylinder 10 and water-cooling component 11, solving the problem of heat accumulation in the closed optical path, maintaining the stable performance of the DMD chip 7 and optical components, and extending the equipment life. In addition, the use of an inclined conversion element 8 optimizes the optical path, so that the light transmitted from the inlet 4 of the housing 2 to the conversion element 8 is deviated from the light beam transmitted from the DMD chip 7 to the outlet 6, preventing interference between the light transmitted from the inlet 4 of the housing 2 to the conversion element 8 and the light beam transmitted from the DMD chip 7 to the outlet 6, thereby improving the light energy utilization and projection resolution.

[0031] Furthermore, the housing 2 includes an incident part 21 and a reflecting part 22, which are interference-fitted. The incident part 21 is provided with a connecting ring 12, and a flange 13 extends outward from the outer wall of the connecting ring 12. The connecting ring 12 is inserted into the incident part 21, and the flange 13 is interference-fitted with the incident part 21. A step 14 and a convex lens 15 are provided inside the incident part 21. One side of the convex lens 15 abuts against the step 14, and the other side of the convex lens 15 abuts against the connecting ring 12.

[0032] The housing 2 is divided into an interference-fitted incident portion 21 and a reflecting portion 22. When manufacturing the housing 2, the installation of the convex lens 15 is avoided, making manufacturing more convenient. In addition, during assembly, the convex lens 15 is first sent from the incident portion 21 to abut against the step 14, and then the connecting ring 12 is inserted into the incident portion 21. The connecting ring 12 is fixed by the interference fit between the flange 13 of the connecting ring 12 and the incident portion 21, thereby fixing the convex lens 15. Compared with the direct interference fit between the connecting ring 12 and the incident portion 21, it is easier to insert and remove the connecting ring 12.

[0033] In this embodiment, a stray light elimination cavity is provided inside the housing 2, and the entrance of the stray light elimination cavity corresponds to the stray light reflection path of the DMD chip 7; the bottom of the stray light elimination cavity is provided with an extinction pattern, which is perpendicular to the direction of the incident light.

[0034] When the DMD chip 7 is in the off state, stray light enters and is reflected. The light in the off state includes the light that is already inside the housing 2, as well as the light that enters from the external lens or lens slit. This light is reflected by other structures inside the lens, and the stray light forms a fixed reflection path. When the lens is in use, this stray light will affect the imaging quality of the DMD chip 7. Therefore, a stray light elimination cavity is provided inside the lens housing 2. The entrance of the stray light elimination cavity corresponds to the stray light directional reflection path of the DMD chip 7. The DMD chip 7 shoots stray light into the stray light elimination cavity, and the stray light is absorbed and eliminated by the stray light elimination cavity, thereby achieving the effect of eliminating stray light and allowing the required imaging light to be emitted from the exit port 6, thereby improving the contrast and imaging quality of the lens.

[0035] In this embodiment, the housing 2 has a circular groove 17 at the position corresponding to the outlet 6. The groove wall of the circular groove 17 is provided with multiple bolt holes 18. The end of the water-cooled cylinder 10 facing the housing 2 is provided with multiple bolt holes 19. Bolts are provided between the bolt holes 18 and the bolt holes 19. A sealing ring 20 is provided between the water-cooled cylinder 10 and the housing 2. The sealing ring 20 is provided with multiple clearance holes 23. The clearance holes 23 are used to avoid the bolts. The end of the water-cooled cylinder 10 facing the housing 2 extends outward with a flange 24. A sealing groove is provided between the flange 24 and the housing 2. A sealing ring is provided in the sealing groove.

[0036] Since water cooling is used for heat dissipation in this embodiment, the light-transmitting sealing ring and the sealing ring 20 achieve a seal between the water-cooling cylinder 10 and the housing 2, preventing external water from entering the housing 2 and interfering with the light transmitted inside the housing 2.

[0037] Furthermore, a flange three is provided on the side of the water-cooled cylinder 10 facing the light-transmitting cylinder 3. A fixing ring 25 is provided between the flange three and the light-transmitting cylinder 3. The fixing ring 25 has a first slot 26 and a second slot 27. A first retaining ring 28 is provided between the fixing ring 25 and the light-transmitting cylinder 3. A second retaining ring 29 is provided between the fixing ring 25 and the water-cooled cylinder 10. The first slot 26 engages with the first retaining ring 28, and the second slot 27 engages with the second retaining ring 29. The flange three, the fixing ring 25 and the light-transmitting cylinder 3 are connected by bolts, which also prevents water from entering the water-cooled cylinder 10 and the light-transmitting cylinder 3 and interfering with the light transmitted inside the water-cooled cylinder 10 and the light-transmitting cylinder 3.

[0038] Furthermore, the fixing ring 25 extends to both sides with flange four and flange five. Flange four abuts against the side wall of flange three, and flange five abuts against the side wall of the light-transmitting tube 3, thereby improving the sealing effect and mechanical strength.

[0039] In this embodiment, a convex lens 32 and a plane mirror 33 are provided on the side of the light-transmitting tube 3 away from the water-cooling tube 10. The plane mirror 33 is used to prevent dust from entering the light-transmitting tube 3.

[0040] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0041] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

1. A water-cooled projection lighting coupling structure, characterized in that, The device includes a light source (1), a housing (2), and a light tube (3). The housing (2) has an inlet (4), a reflection port (5), and an outlet (6). The housing (2) is connected to the light source (1) at the position corresponding to the inlet (4). A DMD chip (7) is disposed outside the housing (2) at the position corresponding to the reflection port (5). A conversion element (8) is disposed obliquely inside the housing (2), and the surface of the conversion element (8) faces the DMD chip (7). A water-cooled cylinder (10) is provided between the outlet (6) of the housing (2) and the light-transmitting cylinder (3). One end of the water-cooled cylinder (10) is connected to the housing (2), and the water-cooled cylinder (10) communicates with the interior of the housing (2) through the outlet (6). The other end of the water-cooled cylinder (10) is connected to the light-transmitting cylinder (3). A water-cooling assembly (11) is provided on the outer wall of the water-cooled cylinder (10).

2. The water-cooled projection lighting coupling structure according to claim 1, characterized in that, The housing (2) includes an incident part (21) and a reflective part (22). The incident part (21) and the reflective part (22) are interference-fitted. The incident part (21) is provided with a connecting ring (12). A flange (24) extends outward from the outer wall of the connecting ring (12). The connecting ring (12) is inserted into the incident part (21). The flange (24) is interference-fitted with the incident part (21). A step (14) and a convex lens (15) are provided inside the incident part (21). One side of the convex lens (15) abuts against the step (14), and the other side of the convex lens (15) abuts against the connecting ring (12).

3. The water-cooled projection lighting coupling structure according to claim 1, characterized in that, The housing (2) is provided with a stray light elimination cavity, the entrance of which corresponds to the stray light reflection path of the DMD chip (7); the bottom of the stray light elimination cavity is provided with an extinction pattern, which is perpendicular to the direction of the incident light.

4. The water-cooled projection lighting coupling structure according to claim 1, characterized in that, The housing (2) has a circular groove (17) at the position corresponding to the outlet (6). The wall of the circular groove (17) is provided with a plurality of bolt holes (18). The end of the water-cooled cylinder (10) facing the housing (2) is provided with a plurality of bolt holes (19). Bolts are provided between the bolt holes (18) and the bolt holes (19). A sealing ring (20) is provided between the water-cooled cylinder (10) and the housing (2). The sealing ring (20) is provided with a plurality of clearance holes (23). The clearance holes (23) are used to avoid the bolts. The end of the water-cooled cylinder (10) facing the housing (2) extends outward with a flange (24). A sealing groove is provided between the flange (24) and the housing (2). A sealing ring is provided in the sealing groove.

5. The water-cooled projection lighting coupling structure according to claim 1, characterized in that, The water-cooled cylinder (10) has a flange three on the side facing the light-transmitting cylinder (3). A fixing ring (25) is provided between the flange three and the light-transmitting cylinder (3). The fixing ring (25) has a first slot (26) and a second slot (27). A first retaining ring (28) is provided between the fixing ring (25) and the light-transmitting cylinder (3). A second retaining ring (29) is provided between the fixing ring (25) and the water-cooled cylinder (10). The first slot (26) engages with the first retaining ring (28). The second slot (27) engages with the second retaining ring (29). The flange three, the fixing ring (25), and the light-transmitting cylinder (3) are connected by bolts.

6. The water-cooled projection lighting coupling structure according to claim 5, characterized in that, The fixing ring (25) extends to both sides with flange four and flange five. Flange four abuts against the side wall of flange three, and flange five abuts against the side wall of the light-transmitting tube (3).

7. The water-cooled projection lighting coupling structure according to claim 1, characterized in that, A convex lens (32) and a plane mirror (33) are provided on the side of the light-transmitting tube (3) away from the water-cooling tube (10). The plane mirror (33) is used to prevent dust from entering the light-transmitting tube (3).

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