Projection device

Abstract

The invention provides a projection device, which comprises a projection host, a projection lens, a projection lens, a projection lens, a projection lens, a projection lens, a projection lens, and a projection lens assembly, and is characterized in that a shell of the projection host is provided with an opening corresponding to the light-emitting side of the lens; the fixed seat is provided with a first end and a second end which are opposite to each other, a hollow light-transmitting cylinder is formed between the first end and the second end, and the light-transmitting cylinder corresponds to the opening; wherein the first end extends into the opening and is in limiting fit with the outer edge of the lens so as to limit the displacement of the lens; the second end is connected with the opening of the shell; and the dimming element is detachably arranged at the second end, and the dimming element corresponds to the light transmission barrel and is used for adjusting the attribute of the light beam emitted from the lens.

Description

Technical Field

[0001] The present invention relates to the field of projection technology, and particularly to a projection device suitable for a motion platform (such as an aircraft flight simulation cabin) and a dark field scenario. Background Art

[0002] In a motion platform, such as a flight simulation cabin, a ship simulation cabin, etc., the projection device needs to keep the picture stable in a dynamic environment (such as simulating dynamic actions like bumps and turns in real flight) to provide an immersive experience. Also, different scenarios require different projection effects. In a dark field scenario, the requirement for the brightness of the projection picture is lower.

[0003] However, the traditional projector lens is only fixed in the housing by threads or snap-fits, and is prone to displacement in a dynamic environment, resulting in picture jitter, ghosting, and even optical parameter deviation, thus affecting the authenticity of simulation training. Moreover, a conventional projector cannot adjust the output beam attributes (such as brightness, polarization state) according to requirements at the same time. For example, in a dark field scenario, excessive light intensity will reduce the contrast, masking the dark details and thus affecting the simulation training and immersive experience.

[0004] Therefore, it is necessary to design a new type of projection device to improve the above defects. Summary of the Invention

[0005] The purpose of the present invention is to provide a projection device, the first end of the fixing seat is in pressing contact with the outer edge of the lens, and the second end is connected to the housing, which can improve the stability of the lens and avoid displacement, overcoming the problem of lens offset in a dynamic environment; in addition, a light regulating element is detachably arranged on the second end, and thus the output beam attributes can be adjusted according to requirements, suitable for a motion platform (such as a flight simulation cabin) and the low light requirements of a dark field, realizing dynamic immersive display.

[0006] To achieve the above object, the present invention provides a projection device, including a projection host, and an opening is provided on the housing of the projection host, and the opening corresponds to the light exit side of the lens in the projection host;

[0007] A fixing seat, having opposite first and second ends, and a hollow light passing cylinder is formed between the first and second ends, and the light passing cylinder corresponds to the opening; wherein, the first end extends into the opening and is in limit fit with the outer edge of the lens to limit the displacement of the lens; the second end is connected to the opening of the housing; and,

[0008] A light regulating element, detachably arranged on the second end, and the light regulating element corresponds to the light passing cylinder, and is used for adjusting the attributes of the beam emitted from the lens.

[0009] Preferably, the light passing cylinder extends along the optical axis direction of the lens.

[0010] Preferably, the second end is provided with a slot having an insertion opening; wherein, the dimming element is inserted into the slot from the insertion opening.

[0011] Preferably, a first locking hole is provided at the insertion opening, and the extending direction thereof is perpendicular to the extending direction of the slot;

[0012] A locking accessory is detachably arranged in the first locking hole. When the locking accessory is operated to penetrate through the first locking hole at the insertion opening, a part of the locking accessory is embedded into the insertion opening to prevent the dimming element from coming out of the slot.

[0013] Preferably, the locking accessory in the insertion opening is in clearance fit with the side surface of the dimming element close to the insertion opening.

[0014] Preferably, there are a plurality of the locking accessories and the first locking holes. The plurality of first locking holes are uniformly distributed on the circumferential side of the second end; and a plurality of second locking holes corresponding to the first locking holes are provided at the opening of the housing;

[0015] Wherein, each locking accessory is operated to penetrate through each first locking hole and the corresponding second locking hole, so that the fixing base is fixedly connected to the housing.

[0016] Preferably, the dimming element is a filter to adjust the light intensity output by the lens.

[0017] Preferably, the dimming element is a polarizer to perform polarization splitting on the light beam emitted by the lens.

[0018] Preferably, a gasket is arranged on the first end, and the gasket is in elastic pressing contact with the outer edge of the lens.

[0019] Preferably, the gasket is a silicone gasket.

[0020] Compared with the prior art, the projection device provided by the present invention forms a mechanical constraint by the pressing contact between the first end of the fixing base and the outer edge of the lens, and cooperates with the connection between the second end and the housing, so that the displacement of the lens can be avoided in a moving environment, and problems such as optical axis deviation and picture jitter caused by lens deviation in a dynamic environment can be avoided; in addition, by detachably arranging the dimming element at the second end, the attributes of the output light beam (such as brightness, polarization state, etc.) can be adjusted according to requirements, realizing optical stability and adjustment of the light beam attributes. Description of the Drawings

[0021] Figure 1 It is a partial exploded structural schematic diagram of the projection device according to an embodiment of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the fixing base according to an embodiment of the present invention;

[0023] Figure 3 is Figure 2 a schematic rear view structure diagram of the fixed seat in Specific Embodiments

[0024] To further understand the purpose, structure, features, and functions of the present invention, the following is a detailed description in conjunction with embodiments.

[0025] In the specification and claims, certain terms are used to refer to specific elements. Those of ordinary skill in the art should understand that manufacturers may use different names to refer to the same element. The specification and claims do not use the difference in names as a way to distinguish elements, but use the difference in functions of elements as the criterion for distinction. The term "comprising" mentioned throughout the specification and claims is an open-ended term and should be interpreted as "including but not limited to".

[0026] Please refer to Figures 1 - 3 , Figure 1 which is a partial exploded schematic diagram of a projection device according to an embodiment of the present invention, Figure 2 which is a schematic structure diagram of the fixed seat 2 according to an embodiment of the present invention, Figure 3 is Figure 2 a rear view of the fixed seat 2 in

[0027] The above-mentioned projection device includes a projection host 1 ( Figure 1 The outer shape of the projection host 1 shown is only an example, and the present invention is not limited thereto), a fixed seat 2, and a dimming element 3. An opening 11 is provided on the front side of the housing 10 of the projection host 1. The lens is mounted on an optical engine module (not shown) inside the housing 10 of the projection host 1. The position of the opening 11 corresponds to the light-emitting side of the lens, and the size of the opening 11 is larger than the outer diameter of the lens. As Figure 2 shown, the above-mentioned fixed seat 2 includes opposite first end 21 and second end 22. A hollow light-transmitting cylinder 23 is formed between the first end 21 and the second end 22, and the light-transmitting cylinder 23 corresponds to the opening 11 on the housing 10. The first end 21 of the fixed seat 2 extends into the opening 11 of the housing 10 and is in pressing fit with the outer edge of the lens. The second end 22 of the fixed seat 2 is connected to the opening 11 of the housing 10, thereby restricting the displacement of the lens, overcoming the problem of lens offset of the projection device in a dynamic environment, and avoiding image jitter caused by beam offset; in addition, the above-mentioned dimming element 3 is detachably provided on the second end 22 of the fixed seat 2, and the dimming element 3 corresponds to the above-mentioned light-transmitting cylinder 23, thereby being able to effectively adjust the beam properties emitted from the lens. The projection device proposed by the present invention can be applied to a moving platform (such as a flight simulation cabin) and low-light requirements in a dark field, realizing dynamic immersive display.

[0028] As Figure 2As shown, in one embodiment, the first end 21 has a first opening, the second end 22 has a second opening, the size of the first opening is less than or equal to the size of the second opening, and the first and second openings are connected through a light tube 23. The light tube 23 extends along the optical axis of the lens and has a guide surface S, so that the light beam emitted from the lens passes through the light tube 23 without obstruction. At the same time, the structure of the guide surface S also enhances the structural strength of the fixing seat 2 and reduces the probability of deformation due to external impact.

[0029] In one embodiment, a slot 24 is disposed outside the second end 22 of the fixing seat 2, and its extension direction intersects with the optical axis direction of the lens. The width of the slot 24 preferably matches the thickness of the dimming element 3. The slot 24 has an insertion port, which is exposed to the housing 10 of the projection host 1, so that the dimming element 3 can be inserted along the direction of arrow A (such as Figure 2 The dimming element 3 is inserted into the slot 24, and after being inserted into the slot 24, it is located in the light path, and the slot 24 does not cause any obstruction and does not affect the emission of the light beam; through the slot 24 structure of the second end 22 of the fixing seat 2, the dimming element 3 can be quickly plugged in and replaced, and the properties of the light beam emitted from the lens can be effectively adjusted.

[0030] Further, see Figure 1 , a first locking hole 25' is provided on the outer side wall at the entrance of the above-mentioned slot 24, and its axial extension direction is perpendicular to the extension direction of the slot 24, and a locking accessory 4 is detachably provided in the first locking hole 25'. After the dimming element 3 is fully inserted into the slot 24, when the locking accessory 4 is operated to pass through the first locking hole 25' at the insertion port, part of the locking accessory 4 is embedded in the path space of the insertion port to prevent the dimming element 3 from escaping from the slot 24 in a dynamic scene. In addition, preferably, the above-mentioned locking accessory 4 in the insertion port is clearance-matched with a side surface of the dimming element 3 close to the insertion port (for example, a clearance of 0.1-0.3mm, but the present invention is not limited thereto), which prevents the dimming element 3 from escaping, and can further avoid the locking force from directly acting on the surface of the optical element to cause stress concentration or optical distortion.

[0031] In one embodiment, there are multiple first locking holes 25, and the multiple first locking holes 25 are evenly distributed on the circumferential side of the second end 22. A plurality of second locking holes 12 corresponding to the first locking holes 25 are provided at the opening 11 of the housing 10. There are multiple locking accessories 4. Operating each locking accessory 4 to pass through each first locking hole 25 and the corresponding second locking hole 12 enables a firm connection between the fixed seat 2 and the housing 10, preventing the fixed seat 2 from loosening during vibration. As described above, one of the multiple first locking holes 25, i.e., 25', is provided at the entrance of the slot 24, and the locking accessory 4 corresponding to the first locking hole 25' can simultaneously limit the dimming element 3 and connect to the housing 10, simplifying the structure and improving the assembly efficiency. In addition, in some possible embodiments, the first locking holes 25 and the second locking holes 12 are, for example, screw holes, and the locking accessory 4 is, for example, a bolt adapted to the screw holes; or the locking accessory 4 is fixedly connected to the first locking holes 25 and the second locking holes 12; or the locking accessory 4 is riveted to the first locking holes 25 and the second locking holes 12. The present invention is not limited thereto.

[0032] In one embodiment, the dimming element 3 is a filter. In a dark field scenario, the filter can absorb part of the light intensity to reduce the output brightness, enhance the contrast of the picture, and improve the display. In actual use, the light transmittance of the filter can be adjusted as needed to be applicable to various dark field scenarios. In addition, in scenarios where polarization splitting is required (such as 3D projection), the dimming element 3 can be a polarizing plate to allow light of a specific polarization direction to pass through to achieve a special display effect. The dimming element 3 in the present invention can be replaced as needed to adapt to the requirements of multiple scenarios such as flight simulation, in-vehicle HUD, and theater-level 3D projection, and is not limited to filters and polarizing plates.

[0033] In one embodiment, an annular groove is provided at the first end 21 of the fixed seat 2 for installing a silicone gasket 26. In actual use, the thickness dimension and shape of the silicone gasket 26 can be selected as needed. The gasket 26 elastically presses against the outer edge of the lens, suppressing lens displacement and absorbing vibration energy.

[0034] In summary, the projection device proposed by the present invention elastically presses and cooperates the first end 21 of the fixed seat 2 with the outer edge of the lens, and locks and connects the second end 22 to the housing 10 to limit the lens displacement, overcome the lens offset problem in a dynamic environment, and effectively avoid problems such as picture jitter and ghosting. The second end 22 of the fixed seat 2 is detachably provided with a dimming element 3 (such as a filter) to adjust the properties of the light beam emitted from the lens, and can be applicable to the projection environment of a moving platform (such as a flight simulation cabin) and the dark field low light requirements to achieve dynamic immersive display.

[0035] The present invention has been described by the above related embodiments. However, the above embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, modifications and refinements made without departing from the spirit and scope of the present invention fall within the scope of patent protection of the present invention.

Claims

1. A projection device, characterized in that, Comprising: A projection host, on the housing of which there is an opening corresponding to the light-emitting side of the lens within the projection host; A fixing seat having opposite first and second ends, and a hollow light-transmitting cylinder is formed between the first and second ends, and the light-transmitting cylinder corresponds to the opening; wherein, the first end extends into the opening and is in limit fit with the outer edge of the lens to limit the displacement of the lens; the second end is connected to the opening of the housing; and, A light-adjusting element detachably disposed at the second end, the light-adjusting element corresponding to the light-transmitting cylinder and used for adjusting the beam properties of the light emitted from the lens.

2. The projection device according to claim 1, wherein The light-transmitting cylinder extends along the optical axis direction of the lens.

3. The projection device according to claim 1, characterized in that, The second end is provided with a slot having an insertion opening; wherein, the light-adjusting element is inserted into the slot from the insertion opening.

4. The projection device according to claim 3, characterized in that A first locking hole is provided at the insertion opening, and its extending direction is perpendicular to the extending direction of the slot; A locking accessory is detachably disposed in the first locking hole. When the locking accessory is operated to penetrate the first locking hole at the insertion opening, a part of the locking accessory is embedded into the insertion opening to prevent the light-adjusting element from coming out of the slot.

5. The projection device according to claim 4, wherein, The locking accessory in the insertion opening has a clearance fit with a side surface of the light-adjusting element close to the insertion opening.

6. The projection device according to claim 4, wherein, There are a plurality of the locking accessories and the first locking holes. The plurality of first locking holes are evenly distributed on the circumferential side of the second end; and a plurality of second locking holes corresponding to the first locking holes are provided at the opening of the housing; Wherein, each locking accessory is operated to penetrate each first locking hole and the corresponding second locking hole to fixedly connect the fixing seat and the housing.

7. The projection device according to claim 1, wherein The light-adjusting element is a filter for adjusting the light intensity output by the lens.

8. The projection device according to claim 1, wherein The light-adjusting element is a polarizer for performing polarization splitting on the light beam emitted from the lens.

9. The projection device according to claim 1, wherein A gasket is provided on the first end, and the gasket is in elastic pressing contact with the outer edge of the lens.

10. The projection device according to claim 9, characterized in that, The gasket is a silicone gasket.

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