Light path structure of projector

Abstract

The utility model provides a light path structure of a projector, which comprises a shell, a light path structure is arranged in the shell, and a heat dissipation structure is arranged on the surface of the shell. The light path structure comprises a light source and collecting lenses, the light source is fixedly installed on the inner wall of the shell, and the collecting lenses are fixedly installed on the periphery of the light source; according to the utility model, stray light in natural light can be effectively filtered by introducing the polariscope body into a light path, and the polarization direction of light is ensured to be uniform, so that the contrast ratio and the color rendition degree of projected images are improved, the projected images are clearer and brighter due to the improvement, and the visual experience is obviously improved; the polariscope can filter irrelevant part of light in natural light, light interference is reduced, the brightness and definition of a projected image are prevented from being affected by stray light, the projector is particularly useful for being used in a complex light environment, and the stability of the projection effect is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of projection display, in particular to an optical path structure of a projector. Background Art

[0002] The technical field of projection display involves using optical and electronic devices to project images or videos onto a screen or other surface to achieve the purpose of large-format display. This technology is widely used in scenarios such as home entertainment, education, business meetings, and advertising displays. Projection display devices convert digital signals into optical signals and use optical components such as lenses and optical path designs for adjustment and magnification to clearly present images within a large range. Common projection display technologies include LCD (Liquid Crystal Display), DLP (Digital Light Processing), and LCoS (Liquid Crystal on Silicon), etc., and each technology has its advantages in terms of resolution, color performance, contrast, etc.

[0003] However, the optical path structure of the projectors in the prior art fails to effectively handle the interference problem of natural light, resulting in lower contrast and color restoration of the projected images. The projected images are easily affected by stray light, thus resulting in uneven brightness and blurred image quality. Therefore, improvements are needed. Summary of the Utility Model

[0004] In order to solve the above problems, the utility model proposes an optical path structure of a projector to more precisely solve the problems that lead to lower contrast and color restoration of the projected images and the projected images are easily affected by stray light.

[0005] The utility model is realized through the following technical solutions:

[0006] The utility model proposes an optical path structure of a projector, including a housing. An optical path structure is arranged inside the housing, and a heat dissipation structure is arranged on the surface of the housing;

[0007] The optical path structure includes a light source and a condenser. The light source is fixedly installed on the inner wall of the housing, the condenser is fixedly installed around the light source, a polarizer body and a reflector are installed at the bottom end of the condenser, and a projection lens is fixedly installed on the surface of the housing.

[0008] Further, the polarizer body is a linear polarizer, the polarizer body has a working wavelength range of 400nm to 700nm, the optical transmittance is not less than 85%, and the polarization degree is not less than 99%.

[0009] Further, a handle is fixedly installed on the top surface of the housing, and the handle is made of natural rubber.

[0010] Further, ventilation holes are opened on the side surface of the housing, and the ventilation holes are evenly distributed on both sides of the housing.

[0011] Further, the heat dissipation structure includes a top fan fixedly installed on the top of the housing. A bottom fan is fixedly installed on the inner wall of the housing. A heat sink is installed on the side of the bottom fan. Heat dissipation grooves are formed on the bottom surface and the back surface of the housing.

[0012] Further, the heat dissipation grooves are evenly distributed on the bottom surface and the back surface of the housing.

[0013] Further, the heat sink is made of pure copper and is arranged at equal intervals on the inner wall of the housing.

[0014] Further, the heat sink is in contact with the bottom surface of the light source.

[0015] Advantages of the utility model:

[0016] 1. By introducing a polarizing lens body into the optical path, the utility model can effectively filter the stray light in natural light and ensure the unity of the polarization direction of light, thereby improving the contrast and color restoration degree of the projected image. This improvement makes the projected image clearer and brighter, significantly enhancing the visual experience. Moreover, the polarizing lens can filter out the irrelevant part of the light in natural light, reducing light interference, thus avoiding the influence of stray light on the brightness and clarity of the projected image. This is particularly useful for using a projector in a complex lighting environment, ensuring the stability of the projection effect. By concentrating the light emitted by the light source through a condenser lens and then filtering and adjusting the direction of light through a polarizing lens, the light energy utilization efficiency in the optical path can be improved, reducing energy loss. Under the same light source power, a higher light intensity can be projected, thereby enhancing the projection effect, and it has high practicality.

[0017] 2. The utility model cools the polarizing lens body, the reflecting mirror and the projection lens by the top fan blowing air downward, effectively reducing the heat accumulation generated by the optical components during long-term operation, thereby ensuring the normal operation of the projector and a stable projection effect. The bottom fan discharges the hot air downward and makes the air pass through the heat sink, further enhancing the heat dissipation effect and avoiding the problem of overheating of the optical path structure. At the same time, the bottom fan directly cools the light source through the heat sink, effectively conducting and discharging the heat generated by the light source, preventing the light source from overheating and causing performance degradation or damage. By using the top fan and the bottom fan to form a complete air circulation channel, it ensures that cold air enters while hot air is quickly discharged, effectively avoiding the accumulation of hot air inside the device, helping to maintain a stable temperature of the optical path structure, and reducing the influence of heat on the projection image quality, and it has high practicality. Description of the drawings

[0018] Figure 1 is an exploded view of the optical path structure of the projector of the utility model;

[0019] Figure 2 This is a side - perspective cross - sectional view of the optical path structure of the projector of the present utility model;

[0020] Figure 3 This is a front - perspective cross - sectional view of the optical path structure of the projector of the present utility model;

[0021] Figure 4 This is a bottom view of the optical path structure of the projector of the present utility model.

[0022] The reference numerals are as follows:

[0023] 1, housing; 2, optical path structure; 3, heat dissipation structure; 21, light source; 22, condenser lens; 23, polarizer body; 24, reflector; 25, projection lens; 4, handle; 5, ventilation holes; 31, top fan; 32, bottom fan; 33, heat sink; 34, heat dissipation grooves. Detailed implementation manners

[0024] To more clearly and completely illustrate the technical solution of the present utility model, the present utility model will be further described below with reference to the accompanying drawings.

[0025] Please refer to Figures 1-4 , the present utility model proposes an optical path structure of a projector, including a housing 1. A handle 4 is fixedly installed on the top surface of the housing 1. The handle 4 is made of natural rubber. The handle 4 can be fixed to the housing 1 by screws or riveting. Such a connection method can ensure the stability of the handle 4 and is convenient for the replacement or disassembly of the handle 4. The natural rubber material has good hand feel and anti - slip performance, which is suitable for providing a comfortable gripping experience during carrying. Ventilation holes 5 are provided on the side surface of the housing 1. The ventilation holes 5 are evenly distributed on both sides of the housing 1. The ventilation holes 5 can be directly processed on the housing 1 by stamping technology to ensure their dimensional accuracy and uniformity. This evenly distributed design helps the internal air flow circulation and improves the heat dissipation effect of the device. An optical path structure 2 is arranged inside the housing 1, and a heat dissipation structure 3 is arranged on the surface of the housing 1; the optical path structure 2 includes a light source 21 and a condenser lens 22. The light source 21 is fixedly installed on the inner wall of the housing 1. The light source 21 can be installed by screws or snap - fasteners to ensure the fixing stability of the light source 21 and is convenient for later maintenance or replacement. The light source 21 provides the light source required for projection by emitting light. The condenser lens 22 is fixedly installed around the light source 21. The condenser lens 22 is fixed outside the light source 21 through a clamping structure or a threaded connection to ensure that the optical axis of the condenser lens 22 is precisely aligned with the light source 21. The function of the condenser lens 22 is to concentrate the light emitted by the light source 21, enhance the light intensity, and improve the projection brightness.

[0026] At the bottom end of the condenser 22, a polarizer body 23 and a reflector 24 are installed. The polarizer body 23 is a linear polarizer. The polarizer body 23 has a working wavelength range of 400 nm to 700 nm, an optical transmittance of not less than 85%, and a polarization degree of not less than 99%. The polarizer body 23 is fixed to the condenser 22 by means of a buckle or a thread. Such a fixing method not only ensures the optical stability of the polarizer body 23, but also facilitates cleaning and replacement. The polarizer body 23 is used to filter the natural light emitted by the light source 21, making its polarization direction uniform and reducing the influence of stray light, thereby improving the contrast and color restoration degree of the projection image, and ensuring that the projection effect is clear and bright. At the end of the optical path, the reflector 24 reflects the light to the projection lens 25. The projection lens 25 is fixed to the surface of the housing 1 by means of a thread or a flange connection. The flange connection can provide higher stability and precision, ensuring that the projection lens 25 does not displace during long-term use. The function of the reflector 24 is to adjust the direction of the light so that it can be accurately projected into the projection lens 25 to achieve the projection function.

[0027] The heat dissipation structure 3 includes a top fan 31. The top fan 31 is fixedly installed on the top of the housing 1. The top fan 31 can be fixed by bolts or buckles. Such a connection method can facilitate the disassembly and cleaning of the fan. The top fan 31 is used to blow air downward to cool the polarizer body 23, the reflector 24 and the projection lens 25 in the optical path structure 2, preventing heat accumulation caused by long-term operation, and thus ensuring the stable operation of the device. A bottom fan 32 is fixedly installed on the inner wall of the housing 1. The bottom fan 32 is fixed to the bottom of the housing 1 by screws or buckles to ensure that the fan does not vibrate during operation. A heat sink 33 is installed on the side of the bottom fan 32. The heat sink 33 is fixed by welding or screws to ensure that the heat sink 33 is in close contact with the light source 21. The heat sink 33 is made of pure copper material and has excellent heat conduction performance, which can quickly conduct the heat generated by the light source 21. The heat sinks 33 are arranged at equal intervals on the inner wall of the housing 1 to ensure uniform heat dissipation of the entire optical path structure 2 and prevent overheating of a certain part. Heat dissipation grooves 34 are provided on the bottom surface and the back surface of the housing 1. The heat dissipation grooves 34 are formed by casting or stamping processes and are evenly distributed on the bottom surface and the back surface of the housing 1 to facilitate the rapid discharge of the internal hot air. The heat dissipation grooves 34 cooperate with the exhaust function of the bottom fan 32 to further enhance the heat dissipation effect of the device.

[0028] In this embodiment, light is emitted by the light source 21 and then concentrated by the condenser lens 22. Meanwhile, the light passes through the polarizer body 23 which is used to filter the unfiltered natural light emitted by the light source 21 to ensure the uniformity of the polarization direction of the projected light so as to achieve the best projection effect. Finally, it is reflected by the reflector 24 and projected into the projection lens 25. By introducing the polarizer body 23 into the optical path, the present utility model can effectively filter the stray light in natural light and ensure the uniformity of the polarization direction of the light, thereby improving the contrast and color restoration degree of the projection image. This improvement makes the projection image clearer and brighter, significantly enhancing the visual experience. Moreover, the polarizer can filter out the irrelevant partial light in natural light, reducing the light interference, thus avoiding the influence of stray light on the brightness and clarity of the projection image, which is particularly useful for using the projector in a complex lighting environment and ensuring the stability of the projection effect. By concentrating the light emitted by the light source 21 through the condenser lens 22 and then filtering and adjusting the direction of the light through the polarizer, the light energy utilization efficiency in the optical path can be improved, reducing the energy loss. At the same power of the light source 21, a higher light intensity can be projected, thereby enhancing the projection effect. By blowing air downward through the top fan 31, the polarizer body 23, the reflector 24 and the projection lens 25 are cooled. And by the bottom fan 32, the hot air can be discharged downward through the heat dissipation slot 34. At the same time, the bottom fan 32 can also let the air pass through the heat sink 33. Since the heat sink 33 is in contact with the light source 21, the heat on the light source 21 can be conducted out at this time, thereby effectively cooling the optical path structure 2. By blowing air downward through the top fan 31 to cool the polarizer body 23, the reflector 24 and the projection lens 25, the present utility model effectively reduces the heat accumulation generated by the optical elements due to long-term operation, thus ensuring the normal operation of the projector and the stable projection effect. The bottom fan 32 further enhances the heat dissipation effect by discharging the hot air downward and making the air pass through the heat sink 33, avoiding the problem of overheating of the optical path structure 2. At the same time, the bottom fan 32 directly cools the light source 21 through the heat sink 33, effectively conducting and discharging the heat generated by the light source 21, preventing the performance decline or damage caused by the overheating of the light source 21. And by using the top fan 31 and the bottom fan 32 to form a complete air circulation channel, it ensures that cold air enters while hot air is quickly discharged, effectively avoiding the accumulation of hot air inside the device, contributing to maintaining the stable temperature of the optical path structure 2 and reducing the influence of heat on the projection image quality.

[0029] Certainly, the present utility model can also have many other embodiments. Based on this embodiment, other embodiments obtained by those of ordinary skill in the art without any creative work belong to the scope protected by the present utility model.

Claims

1. A projector optical path structure, characterized in that: It comprises a shell, wherein an optical path structure is arranged inside the shell, and a heat dissipation structure is arranged on the surface of the shell; the optical path structure comprises a light source and a condenser, wherein the light source is fixedly mounted on the inner wall of the shell, the condenser is fixedly mounted around the light source, a polarizer body and a reflector are mounted on the bottom end of the condenser, and a projection lens is fixedly mounted on the surface of the shell.

2. The projector optical path structure according to claim 1, characterized in that: The side of the shell is provided with ventilation holes, and the ventilation holes are evenly distributed on both sides of the shell.

3. The projector optical path structure according to claim 1, characterized in that: The heat dissipation structure comprises a top fan, which is fixedly mounted on the top of the shell, a bottom fan is fixedly mounted on the inner wall of the shell, a heat sink is mounted on the side of the bottom fan, and heat dissipation grooves are provided on the bottom and back of the shell.

4. The projector optical path structure according to claim 3, characterized in that: The heat dissipation grooves are evenly distributed on the bottom surface and the back surface of the shell.

5. The projector optical path structure according to claim 3, characterized in that: The heat sink is in contact with the bottom surface of the light source.

6. The projector optical path structure according to claim 1, characterized in that: The polarizer body is a linear polarizer, and the polarizer body has an operating wavelength range of 400nm to 700nm, an optical transmittance of not less than 85%, and a polarization degree of not less than 99%.

7. The projector optical path structure according to claim 1, characterized in that: A handle is fixedly mounted on the top surface of the shell, and the handle is made of natural rubber.

8. The projector optical path structure according to claim 3, characterized in that: The heat sink is made of pure copper and is arranged at equal distances on the inner wall of the shell.

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