A projection device

Abstract

The application discloses a projection device, which comprises a device main body, a lens support and an optical lens, the device main body is provided with a containing groove, the lens support is installed in the containing groove, and an adjusting gap exists between the lens support and the device main body in a first direction, the lens support is formed with a positioning groove, the optical lens is arranged in the positioning groove, and the lens support drives the optical lens to move along the first direction under the action of external driving force, so that the position of the optical lens in the device main body is adjusted.

Description

Technical Field

[0001] This application relates to the field of optical product technology, and more specifically, to a projection device. Background Technology

[0002] With the rapid development of science and technology, projection technology has matured, and the application areas of projection equipment have become increasingly broad. These include commercial applications such as conference presentations, roadshows, and promotional activities; educational applications such as school lectures and academic discussions; and home applications such as home theaters. In recent years, Digital Light Processing (DLP) projectors have become the mainstream technology for projectors, offering superior performance in terms of portability, durability, high brightness, and high contrast.

[0003] During the assembly of a DLP projector, deviations in lens assembly can cause light emitted from the light source components to be blocked. This results in an abnormal light propagation path that cannot match the DMD imaging surface, creating dark bands at the edges of the projected image and affecting the projection effect.

[0004] When there are dark bands at the edges of the projected image, the traditional solution is to grind the optical lenses to improve the dark band phenomenon. However, this solution is complicated and inefficient, and is not suitable for mass production.

[0005] In view of this, it is necessary to propose a new technical solution to solve the above-mentioned technical problems. Summary of the Invention

[0006] One objective of this application is to provide a new technical solution for projection devices.

[0007] According to a first aspect of this application, a projection device is provided, the projection device comprising:

[0008] The main body of the equipment is provided with a receiving groove;

[0009] A lens holder is installed in the receiving groove, and there is an adjustment gap between the lens holder and the device body in a first direction; the lens holder has a positioning groove.

[0010] An optical lens is disposed in the positioning groove;

[0011] The lens holder, under the action of an external driving force, drives the optical lens to move along a first direction to adjust the position of the optical lens within the main body of the device.

[0012] Optionally, the lens holder has a first sidewall, a second sidewall, and a bottom wall, wherein the first sidewall and the second sidewall are disposed opposite to each other along a first direction, and the bottom wall is connected between the first sidewall and the second sidewall;

[0013] The positioning groove is formed between the first sidewall, the second sidewall, and the bottom wall;

[0014] There is a first adjustment gap between the first sidewall and the main body of the equipment in a first direction, and there is a second adjustment gap between the second sidewall and the main body of the equipment in a first direction.

[0015] Optionally, the bottom wall is exposed to the outside of the device body via the receiving groove;

[0016] A boss protrudes from one side of the bottom wall, and a third adjustment gap exists between the side of the boss near the first side wall and the main body of the equipment in a first direction. A fourth adjustment gap exists between the other side of the boss near the second side wall and the main body of the equipment in a first direction.

[0017] The third adjustment gap is greater than the first adjustment gap, and the fourth adjustment gap is greater than the second adjustment gap.

[0018] The boss portion is configured such that an external driving force acts on the boss portion to cause the lens holder to drive the optical lens to move along a first direction.

[0019] Optionally, the boss portion and the bottom wall are integrally formed.

[0020] Optionally, the main body of the device is provided with a clearance groove at the location of the boss portion.

[0021] Optionally, the optical lens has a first side portion and a second side portion disposed opposite to each other along a first direction;

[0022] Wherein, the first side portion abuts against the first side wall, and the second side portion abuts against the second side wall;

[0023] The bottom wall is exposed to the outside of the device body via the receiving groove, and the bottom wall has a connecting hole;

[0024] The connecting hole is configured such that an external driving force is applied to the optical lens through the connecting hole, causing the optical lens to move in a second direction between the first sidewall and the second sidewall.

[0025] Optionally, the first sidewall has a first groove on the inner side facing the second sidewall, and the second sidewall has a second groove on the inner side facing the first sidewall.

[0026] A first connecting ear is formed on the first side of the optical lens, and a second connecting ear is formed on the second side of the optical lens;

[0027] The first connecting ear portion is embedded in the first sliding groove, and the second connecting ear portion is embedded in the second sliding groove;

[0028] When the optical lens moves along the second direction, the first connecting ear slides along the first groove, and the second connecting ear slides along the second groove.

[0029] Optionally, the first sidewall protrudes in a direction away from the second sidewall to form a first connecting platform, and the second sidewall protrudes in a direction away from the first sidewall to form a second connecting platform;

[0030] The main body of the device has a first support surface and a second support surface formed on both sides of the receiving groove. The first connecting platform abuts against the first support surface, and the second connecting platform abuts against the second support surface.

[0031] Optionally, the lens holder is made of metal.

[0032] Optionally, the optical lens is a relay lens.

[0033] In the projection device provided in this application embodiment, the position of the optical lens in the device body can be adjusted by moving the lens bracket to improve the dark band problem of the projected image; thus, there is no need to repair the optical lens or the device body, which not only saves processing time and production costs, but also eliminates the need to disassemble the optical lens when the projection device is repaired, thereby reducing the possibility of scratching the optical lens.

[0034] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0035] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present application and, together with their description, serve to explain the principles of the present application.

[0036] Figure 1 The diagram shown is a schematic representation of the overall structure of a projection device according to this application.

[0037] Figure 2 The diagram shown is a partial structural illustration of a projection device according to this application. Figure 1 ;

[0038] Figure 3 The diagram shown is a schematic diagram of the connection between the lens holder and the optical lens in a projection device according to this application;

[0039] Figure 4 The diagram shown is a partial structural illustration of a projection device according to this application. Figure 2 ;

[0040] Figure 5 The diagram shown is a partial structural illustration of a projection device according to this application. Figure 3 ;

[0041] Figure 6 The diagram shown is a partial structural schematic of the main body of a projection device according to this application;

[0042] Figure 7a The image shown is a simulation of the dark band in a projection device according to this application. Figure 1 ;

[0043] Figure 7b The image shown is a simulation of the dark band in a projection device according to this application. Figure 2 .

[0044] Explanation of reference numerals in the attached figures:

[0045] 1. Equipment body; 100. Receiving groove; 101. Clearance groove; 11. First support surface; 12. Second support surface;

[0046] 2. Lens support; 21. First sidewall; 22. Second sidewall; 23. Bottom wall; 231. Boss; 24. First connecting platform; 25. Second connecting platform; 200. Positioning groove; 201. First adjustment gap; 202. Second adjustment gap; 203. Third adjustment gap; 204. Fourth adjustment gap; 205. Connecting hole; 206. First sliding groove; 207. Second sliding groove;

[0047] 3. Optical lens; 31. First connecting ear; 32. Second connecting ear. Detailed Implementation

[0048] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0049] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0050] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0051] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0052] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0053] Reference Figures 1-6 As shown, according to one embodiment of this application, a projection device is provided, the projection device including a device body 1, a lens holder 2 and an optical lens 3, the device body 1 having an accommodating groove 100;

[0054] The lens holder 2 is installed in the receiving groove 100, and there is an adjustment gap between the lens holder 2 and the device body 1 in the first direction; the lens holder 2 forms a positioning groove 200; the optical lens 3 is disposed in the positioning groove 200;

[0055] The lens holder 2 drives the optical lens 3 to move along the first direction under the action of an external driving force, so as to adjust the position of the optical lens 3 within the main body 1 of the device.

[0056] In the projection device provided in this embodiment, the optical lens 3 is disposed in the receiving groove 100 opened in the device body 1 by means of the lens holder 2. During the operation of the projection device, when dark bands appear in the projected image, an external driving force is applied to the lens holder 2 that carries the optical lens 3 to drive the lens holder 2 to move. The optical lens 3 moves with the lens holder 2 to adjust the position of the optical lens 3 in the receiving groove 100 of the device body 1, thereby improving the problem of dark bands.

[0057] Because there is an adjustment gap between the lens holder 2 and the device body 1 in the first direction, the position of the optical lens 3 can be adjusted at least in the first direction by applying an external force to the lens holder 2. (Refer to...) Figure 4 As shown, the first direction is Figure 4 The direction of a in the middle, that is Figure 4 The left and right directions in the middle.

[0058] In practical applications, the lens holder 2 is moved to the left or right by applying an external driving force, which is determined by the specific location where the dark band appears.

[0059] In summary, in the projection device provided in this application embodiment, the position of the optical lens 3 in the device body 1 can be adjusted by moving the lens bracket 2 to improve the dark band problem of the projected image; thus, there is no need to repair the optical lens 3 or the device body 1, which not only saves processing time and production costs, but also eliminates the need to disassemble the optical lens 3 when the projection device is repaired, thereby reducing the possibility of scratching the optical lens 3.

[0060] Reference Figure 3 , Figure 4 As shown, in one embodiment, the lens holder 2 has a first sidewall 21, a second sidewall 22 and a bottom wall 23, the first sidewall 21 and the second sidewall 22 are disposed opposite to each other along a first direction, and the bottom wall 23 is connected between the first sidewall 21 and the second sidewall 22.

[0061] The positioning groove 200 is formed between the first sidewall 21, the second sidewall 22 and the bottom wall 23;

[0062] There is a first adjustment gap 201 between the first sidewall 21 and the device body 1 in a first direction, and there is a second adjustment gap 202 between the second sidewall 22 and the device body 1 in a first direction.

[0063] In this specific example, the optical lens 3 can be moved by applying an external force to the first sidewall 21 of the lens holder 2 to move the lens holder 2. Figure 4 When the adjustment is moved to the right, the first adjustment gap 201 increases and the second adjustment gap 202 decreases.

[0064] The optical lens 3 can also be moved by applying an external force to the second sidewall 22 of the lens holder 2 to move the lens holder 2. Figure 4 When the left side of the adjustment is moved, the first adjustment gap 201 becomes smaller and the second adjustment gap 202 becomes larger.

[0065] Reference Figure 5 As shown, in one embodiment, the bottom wall 23 is exposed to the outside of the device body 1 via the receiving groove 100;

[0066] A boss portion 231 protrudes from one side of the bottom wall 23. A third adjustment gap 203 exists between the side of the boss portion 231 near the first side wall 21 and the main body 1 in a first direction. A fourth adjustment gap 204 exists between the other side of the boss portion 231 near the second side wall 22 and the main body 1 in a first direction.

[0067] The third adjustment gap 203 is greater than the first adjustment gap 201, and the fourth adjustment gap 204 is greater than the second adjustment gap 202.

[0068] The boss portion 231 is configured such that an external driving force acts on the boss portion 231 to cause the lens holder 2 to drive the optical lens 3 to move along a first direction.

[0069] In this specific example, for instance, a lever can be used to move the boss 231 to apply an external driving force to the lens holder 2.

[0070] A third adjustment gap 203 and a fourth adjustment gap 204 are provided between the boss portion 231 and the device body 1, providing space to accommodate the actuating lever. Specifically, by placing the actuating lever at the third adjustment gap 203 to actuate the boss portion 231, the first adjustment gap 201 can be increased and the second adjustment gap 202 can be decreased, that is, the lens holder 2 can be moved towards... Figure 4 Move the lever to the right; placing the lever at the fourth adjustment gap 204 and moving the boss 231 can decrease the first adjustment gap 201 and increase the second adjustment gap 202, that is, move the lens holder 2 to the right. Figure 4 Move to the left in the middle.

[0071] Furthermore, in order to ensure that there is always space between the boss portion 231 and the device body 1 to accommodate the lever, thereby ensuring that the position of the lens holder 2 can be effectively adjusted, the third adjustment gap 203 is set to be greater than the first adjustment gap 201, and the fourth adjustment gap 204 is set to be greater than the second adjustment gap 202.

[0072] Thus, when the first sidewall 21 of the lens holder 2 abuts against the device body 1, that is, when the first adjustment gap 201 has been reduced to almost zero, a third adjustment gap 203 still exists between the boss portion 231 and the device body 1, thereby ensuring that when it is necessary to move the lens holder 2 towards... Figure 4 When the lever moves to the right, it can move the boss 231 at the third adjustment gap 203.

[0073] Similarly, when the second sidewall 22 of the lens holder 2 abuts against the device body 1, that is, when the second adjustment gap 202 has been reduced to almost zero, a fourth adjustment gap 204 still exists between the boss portion 231 and the device body 1, thereby ensuring that when it is necessary to move the lens holder 2 towards... Figure 4 When the lever moves to the left, it can move the boss 231 at the fourth adjustment gap 204.

[0074] Reference Figure 5 As shown, in one embodiment, the boss portion 231 and the bottom wall 23 are integrally formed.

[0075] In this specific example, a boss 231 is integrally formed at the bottom wall 23. The boss 231 is simple to set, and there is no looseness between the boss 231 and the bottom wall 23.

[0076] Reference Figure 5 As shown, in one embodiment, the device body 1 has a clearance groove 101 at the location of the boss portion 231.

[0077] In this specific example, at the location of the boss 231, the main body 1 of the equipment is provided with a clearance groove 101; the existence of the clearance groove 101 provides a third adjustment gap 203 and a fourth adjustment gap 204 between the main body 1 of the equipment and the boss 231, so as to avoid interference between the boss 231 and the main body 1 of the equipment.

[0078] Reference Figure 3 , Figure 4 As shown, in one embodiment, the optical lens 3 has a first side portion and a second side portion disposed opposite to each other along a first direction;

[0079] The first side portion abuts against the first sidewall 21, and the second side portion abuts against the second sidewall 22;

[0080] The bottom wall 23 is exposed to the outside of the device body 1 via the receiving groove 100, and the bottom wall 23 is provided with a connecting hole 205;

[0081] The connecting hole 205 is configured such that an external driving force acts on the optical lens 3 through the connecting hole 205, so that the optical lens 3 moves in a second direction between the first sidewall 21 and the second sidewall 22.

[0082] In this specific example, the optical lens 3 is clamped between the first sidewall 21 and the second sidewall 22 of the lens holder 2; by opening a connecting hole 205 in the bottom wall 23 of the lens holder 2, the actuating rod can contact the optical lens 3 through the connecting hole 205 and apply an external driving force to the optical lens 3, thereby causing the optical lens 3 to move along the first sidewall 21 and the second sidewall 22 of the lens holder 2 in a second direction. (Refer to...) Figure 4 As shown, the second direction is Figure 4 In the direction of b.

[0083] Therefore, the optical lens 3 can not only move along with the lens holder 2 under the action of external driving force, but also... Figure 4 The optical lens 3 can move left and right in the direction a shown in the diagram; and the optical lens 3 can also move independently along the direction indicated by an external driving force. Figure 4 As shown, the direction b is moved upwards. This increases the range of adjustment for the position of optical lens 3 and improves the adjustment effect.

[0084] Reference Figure 4 As shown, in one embodiment, the first sidewall 21 is provided with a first groove 206 facing the inner side of the second sidewall 22, and the second sidewall 22 is provided with a second groove 207 facing the inner side of the first sidewall 21.

[0085] A first connecting ear 31 is formed on the first side of the optical lens 3, and a second connecting ear 32 is formed on the second side of the optical lens 3;

[0086] The first connecting ear 31 is partially embedded in the first sliding groove 206, and the second connecting ear 32 is partially embedded in the second sliding groove 207;

[0087] When the optical lens 3 moves along the second direction, the first connecting ear 31 slides along the first groove 206, and the second connecting ear 32 slides along the second groove 207.

[0088] In this specific example, when the optical lens 3 is driven solely by an external force along... Figure 4 When the lens moves upward in direction b, the first connecting ear 31 slides along the first groove 206 of the lens holder 2, and the second connecting ear 32 slides along the second groove 207 of the lens holder 2. The first groove 206 and the second groove 207 provide stable guidance for the movement of the optical lens 3, preventing the optical lens 3 from tilting during movement. It can be understood that both the first groove 206 and the second groove 207 extend along the second direction.

[0089] Reference Figure 3 , Figure 4 , Figure 6 As shown, in one embodiment, the first sidewall 21 protrudes in a direction away from the second sidewall 22 to form a first connecting platform 24, and the second sidewall 22 protrudes in a direction away from the first sidewall 21 to form a second connecting platform 25.

[0090] The main body of the device 1 has a first support surface 11 and a second support surface 12 formed on both sides of the receiving groove 100. The first connecting platform 24 abuts against the first support surface 11, and the second connecting platform 25 abuts against the second support surface 12.

[0091] In this specific example, the optical lens 3, along with the lens holder 2, moves along the path under the action of an external driving force. Figure 4When the device moves left or right in direction a as shown, the first support surface 11 of the main body 1 provides support and guidance for the first connecting platform 24 of the lens holder 2, while the second support surface 12 of the main body 1 provides support and guidance for the second connecting platform 25 of the lens holder 2; ensuring that the lens holder 2 drives the optical lens 3 to move stably.

[0092] In one embodiment, the lens holder 2 is made of metal.

[0093] In this specific example, the lens holder 2 is made of metal. The metal lens holder 2 not only provides stable support for the optical lens 3, but also facilitates heat dissipation for the optical lens 3. This plays a significant role in reducing the temperature of the optical lens 3, ensuring that the optical lens 3 will not burn during high-temperature operation and extending the service life of the projection device.

[0094] In one embodiment, the optical lens 3 is a relay lens.

[0095] In this specific example, optical lens 3 is, for instance, a relay lens; the relay lens has a significant impact on the dark band phenomenon, therefore adjusting the position of the relay lens can effectively improve the dark band problem. Of course, optical lens 3 can also be other types of lenses.

[0096] The following is a detailed explanation of the position adjustment of the optical lens 3 in this projection device using a specific example:

[0097] Taking a DLP projector optical engine as an example, when a dark band appears on the left side of the projected image, the light distribution phenomenon of DMD overflow (the area outside the effective area of ​​the DMD) is as follows: Figure 7a As shown (based on the object-image relationship, the left side of the projected image corresponds to the right side of the DMD), at this time, refer to... Figure 4 As shown, the lens holder 2 is oriented towards Figure 4 The DMD is moved to the left for fine-tuning; after fine-tuning, the overflow ray distribution at the DMD is as follows: Figure 7b As shown (based on the object-image relationship, the left side of the projected image corresponds to the right side of the DMD), the dark band problem in the image has been significantly improved at this point.

[0098] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this application. The scope of this application is defined by the appended claims.

Claims

1. A projection device, characterized in that, The projection device includes: The equipment body (1) has a receiving groove (100). Lens holder (2), the lens holder (2) is installed in the receiving groove (100), and there is an adjustment gap between the lens holder (2) and the device body (1) in a first direction; the lens holder (2) is formed with a positioning groove (200). An optical lens (3) is disposed in the positioning groove (200); The lens holder (2) drives the optical lens (3) to move along the first direction under the action of external driving force, so as to adjust the position of the optical lens (3) within the main body (1) of the device; The lens holder (2) has a first sidewall (21), a second sidewall (22) and a bottom wall (23). The first sidewall (21) and the second sidewall (22) are arranged opposite to each other along a first direction, and the bottom wall (23) is connected between the first sidewall (21) and the second sidewall (22). The optical lens (3) has a first side portion and a second side portion disposed opposite to each other along a first direction; The first side portion abuts against the first sidewall (21), and the second side portion abuts against the second sidewall (22); The bottom wall (23) is exposed to the outside of the device body (1) via the receiving groove (100), and the bottom wall (23) is provided with a connecting hole (205). The connecting hole (205) is configured such that an external driving force acts on the optical lens (3) through the connecting hole (205) to cause the optical lens (3) to move in a second direction between the first sidewall (21) and the second sidewall (22); The first sidewall (21) has a first groove (206) on the inner side facing the second sidewall (22), and the second sidewall (22) has a second groove (207) on the inner side facing the first sidewall (21). A first connecting ear (31) is formed on the first side of the optical lens (3), and a second connecting ear (32) is formed on the second side of the optical lens (3). The first connecting ear (31) is partially embedded in the first sliding groove (206), and the second connecting ear (32) is partially embedded in the second sliding groove (207). When the optical lens (3) moves in the second direction, the first connecting ear (31) slides along the first groove (206), and the second connecting ear (32) slides along the second groove (207).

2. The projection device according to claim 1, characterized in that, The positioning groove (200) is formed between the first sidewall (21), the second sidewall (22) and the bottom wall (23). There is a first adjustment gap (201) between the first sidewall (21) and the main body of the equipment (1) in a first direction, and there is a second adjustment gap (202) between the second sidewall (22) and the main body of the equipment (1) in a first direction.

3. The projection device according to claim 2, characterized in that, The bottom wall (23) is exposed to the outside of the device body (1) via the receiving groove (100); A boss (231) protrudes from one side of the bottom wall (23). A third adjustment gap (203) exists between the boss (231) near the first side wall (21) and the main body of the equipment (1) in a first direction. A fourth adjustment gap (204) exists between the boss (231) near the second side wall (22) and the main body of the equipment (1) in a first direction. The third adjustment gap (203) is greater than the first adjustment gap (201), and the fourth adjustment gap (204) is greater than the second adjustment gap (202). The boss (231) is configured such that an external driving force acts on the boss (231) to cause the lens holder (2) to drive the optical lens (3) to move along a first direction.

4. The projection device according to claim 3, characterized in that, The boss (231) and the bottom wall (23) are integrally formed.

5. The projection device according to claim 3, characterized in that, The main body of the equipment (1) has a clearance groove (101) at the location of the boss (231).

6. The projection device according to claim 1, characterized in that, The first sidewall (21) protrudes in a direction away from the second sidewall (22) to form a first connecting platform (24), and the second sidewall (22) protrudes in a direction away from the first sidewall (21) to form a second connecting platform (25). The main body of the device (1) has a first support surface (11) and a second support surface (12) formed on both sides of the receiving groove (100). The first connecting platform (24) abuts against the first support surface (11), and the second connecting platform (25) abuts against the second support surface (12).

7. The projection device according to any one of claims 1-6, characterized in that, The lens holder (2) is made of metal.

8. The projection device according to any one of claims 1-6, characterized in that, The optical lens (3) is a relay lens.

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