CN214751291U - Projection device and display apparatus - Google Patents

Abstract

The application discloses a projection device and a display device. The projection equipment comprises an optical machine, a lens support and an additional lens, wherein the additional lens is fixedly connected with the optical machine through the lens support, and the additional lens is positioned in an emission light path of the optical machine so as to change the projection ratio of the emission light path of the optical machine. By the mode, the projection ratio of the optical machine is effectively changed.

Description

Projection device and display apparatus

Technical Field

The application relates to the technical field of projection, in particular to a projection device and a display device.

Background

In the prior art, when an optical engine of a projection device is designed in a factory, a projection ratio (a ratio of a projection distance to a frame width) of the optical engine is fixed. Therefore, in subsequent use, the projection ratio of the optical machine cannot be changed according to requirements, because the projection ratio of the optical machine is fixed when the optical machine leaves a factory, a long projection distance is needed for a large projection area, and inconvenience is brought to people in life and production when the optical machine is used for projection.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned drawbacks in the prior art, the present application provides a projection apparatus and a display device.

In order to achieve the purpose, the following technical scheme is adopted:

the projection equipment comprises an optical machine, a lens support and an additional lens, wherein the additional lens is connected with the optical machine through the lens support, and the additional lens is positioned in an emission light path of the optical machine so as to change the projection ratio of the emission light path.

In order to achieve the purpose, the following technical scheme is adopted:

provided is a display device including: the projection equipment is arranged on one side of the screen, so that the projection equipment projects light rays to the screen in a rear projection mode, and then pictures are displayed on the other side of the screen.

The beneficial technical effect of this application is: the additional lens is arranged in the emission light path of the optical machine, the additional lens is connected with the optical machine through the lens support, the lens support can enable the emission light path of the optical machine to stably pass through the additional lens after the emission light path of the optical machine exits the optical machine, the additional lens can condense or disperse light, the emission light path of the optical machine can be changed, and then the throw ratio of the emission light path equipment of the optical machine is changed, so that the projection width can be effectively changed under the condition that the throw distance of the optical machine is fixed, or the projection distance of the optical machine is changed under the condition that the projection width is fixed, compared with the traditional fixed throw ratio of the optical machine, the application can match different additional lenses for the optical machine according to requirements, and further can form projection equipment with different throw ratios, thereby flexibly meeting different requirements of consumers on projection in the fields of production, office, family and the like, can better meet the market demand.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:

FIG. 1 is a schematic side view of the structure of an embodiment of a display device of the present application;

FIG. 2 is a schematic perspective view of a projection apparatus according to an embodiment of the present application;

FIG. 3 is a schematic perspective view of a projection apparatus according to an embodiment of the present application;

FIG. 4 is a schematic diagram of a first embodiment of an embodiment of a projection apparatus of the present application;

FIG. 5 is a schematic diagram of a second embodiment of an embodiment of a projection apparatus of the present application;

FIG. 6 is a schematic diagram of a third embodiment of an embodiment of a projection apparatus of the present application;

fig. 7 is a schematic perspective view of a projection apparatus according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a display device according to the present application. The display device 1 described in the display device embodiment of the present application includes: projection device 10 and screen 20.

The projection device 10 is disposed at one side of the screen 20 such that the projection device 10 projects light onto the screen 20 in a rear projection manner. The projection device 10 and the screen 20 may be integrated in the same apparatus, such that light of the projection device 10 is projected on one side of the screen 20 and the other side of the screen 20 is used for displaying pictures. For example, the display device 1 is a television, a display screen, or the like.

The projection device 10 and the screen 20 may be spatially independent from each other, and the screen 20 may correspond to a curtain, so that when the light of the projection device 10 is projected on one side of the screen 20, the one side of the screen 20 can display a corresponding picture. For example, the display device 1 is in the form of a module, and includes the projection apparatus 10 and the screen 20 which are independent of each other, and when in use, the two are matched according to the corresponding positions.

The projection apparatus 10 of the present embodiment can change the projection ratio of the emission light path of the light source, and thus can be adapted to different display devices 1 by using the same light source according to actual requirements. For the details of the projection device 10 of the present embodiment, reference may be made to the following detailed description of the embodiments of the projection device of the present application.

Referring to fig. 2, fig. 2 is a schematic perspective view of a projection apparatus according to an embodiment of the present disclosure. Referring to fig. 3, fig. 3 is a schematic perspective view of another embodiment of a projection apparatus according to the present application. Projection device 10, described in embodiments of projection devices herein, may include an optical engine 11, a lens holder 12, and an additional lens 13. The projection device 10 shown in fig. 3 is further illustrative of the structure of the housing 14 in addition to the projection device 10 shown in fig. 2. In particular, projection device 10 may also include a housing 14. The light engine 11 and the lens holder 12 may be disposed within a housing 14. The lens holder 12 is connected to the optical engine 11, and the additional lens 13 is connected to the lens holder 12. The light engine 11 may be fixed within the housing 14.

The light emitted by the light engine 11 forms an emission light path. The additional lens 13 is located in the emission light path of the optical engine 11, and the emission light path changes after passing through the additional lens 13, so as to change the projection ratio of the emission light path of the optical engine 11. The light of the light engine 11 may form a projection area 15 after passing through the additional lens 13. The projection area 15 may be located on the screen 20 as mentioned in the above embodiments. Optionally, the housing 14 may be provided with a light hole 140, and the additional lens 13 may be exposed through the light hole 140 so that the emission light path of the optical engine 11 can be emitted out of the housing 14.

The light engine 11 serves as a light source of the projection device 10. Generally, the optical engine 11 has a fixed throw ratio after being shipped from a factory. When the carriage 11 is used alone for projection, a long projection distance is required for a large projection area 15, and a short projection distance is required for a small projection area 15. If the projection space size is limited, the proper light engine 11 must be matched. The same light engine 11, the same projection space, and the projection area 15 formed on the screen are necessarily the same.

The additional lens 13 serves to converge or diverge light. The additional lens 13 is, for example, a convex lens, which can be used to diverge the light. The lens holder 12 may be used to fix the additional lens 13, and then to connect the optical engine 11, so that the lens holder 12 can be stably located in the emission light path. In other words, the additional lens 13 can be stably connected to the optical engine 11 through the lens holder 12. According to different requirements, different additional lenses 13 are adapted based on the same optical machine 11, or different combinations of the additional lenses 13 and the lens holders 12 are adapted, so that different display devices 1 can be obtained, and as for the projection apparatus 10 as described in the above embodiments, the projection ratio of the original optical path of the light source can be changed, and thus different display devices 1 can be adapted by using the same light source according to the actual requirements of the display devices 1.

When the projection light emitted by the optical engine 11 passes through the additional lens 13, the light is refracted, so that the original emission light path of the optical engine 11 is changed, and the projection ratio of the projection device 10 can be changed. For example, the additional lens 13 is a convex lens, and after the emission light path of the optical engine 11 passes through the additional lens 13, the projection ratio of the emission light path of the optical engine 11 can be reduced due to the function of the divergent light of the additional lens 13. In this way, in the case where the distance between the carriage 11 and the screen 20 is relatively fixed, a wider and larger projection area 15 can be obtained.

The additional lens 13 may be fixed to the lens holder 12. Specifically, the lens holder 12 and the additional lens 13 can be fixed by glue, such as glue, double-sided tape, etc., or can be fixed by means of a snap connection, a screw connection, etc. For example, a plurality of cylinders are protruded from one end of the lens holder 12, a plurality of holes matching the diameter of the cylinders are formed in the additional lens 13, and the cylinders of the lens holder 12 are inserted into the holes of the additional lens 13 to realize the fixed connection of the two.

The lens support 12 and the additional lens 13 are convenient for quick fixed connection of the two through a dispensing mode, the assembly is simple and convenient, and the subsequent maintenance work of the projection equipment 10 is also convenient.

Based on the above description, the additional lens 13 is connected to the optical engine 11 through the lens support 12, so that the projection ratio of the emission light path connected to the optical engine 11 can be effectively changed, and in order to further realize the adjustment of the projection ratio, the present embodiment may be adjusted by replacing the additional lens 13 or changing the distance between the additional lens 13 and the optical engine 11. Specifically, the present embodiment can give the following three exemplary embodiments.

The first embodiment: referring to fig. 4, fig. 4 is a schematic structural diagram of a first embodiment of a projection apparatus according to the present application. The lens holder 12 may be detachably fixed to the optical engine 11 to facilitate subsequent replacement of a different additional lens 13, or may also facilitate replacement of the optical engine 11. The detachable connection between the lens holder 12 and the optical engine 11 may be a threaded connection, a snap connection, a screw-fixed connection, or an insertion connection. Of course, the lens holder 12 and the optical engine 11 are fixedly connected in other manners, such as bonding with glue, so that the lens holder 12 and the optical engine 11 can be firmly connected.

Specifically, the lens holder 12 and the optical engine 11 may be detachably connected by a snap structure 100. The snap connection using the snap structure 100 can prevent the optical machine 11 and the lens holder 12 from being contaminated by glue, compared with the glue bonding, and facilitates the subsequent detachment and replacement. Moreover, the clamping structure can be used for facilitating the replacement of different additional lenses 13, and further, the emission light path of the optical machine 11 can be adjusted to different projection ratios through different additional lenses 13.

As shown in fig. 4, the lens holder 12 may be cylindrically disposed. Here, the tube shape is, for example, a horn shape or a straight tube shape, but may be other types of tube shapes. For example, the lens holder 12 may be flared such that its end near the optical engine 11 is larger than its end near the additional lens 13. The additional lens 13 may be fixed to one end of the lens holder 12. The latch structure 100 includes a latch portion 121 disposed at the other end of the lens holder 12 and a flange 111 protruding from the periphery of one end of the optical engine 11. The fastening portion 121 can be fastened to the flange 111, so that the lens holder 12 and the optical engine 11 are fixedly connected. Specifically, one end of the locking portion 121 may be fixedly connected to the other end of the lens holder 12, and the other end of the locking portion 121 extends in a direction away from the lens holder 12 and is provided with a locking block (not labeled) in a protruding manner. The catch is adapted to catch the flange 111. The lens holder 12 and the optical engine 11 can be restricted from moving away from each other by the engagement of the engaging portion 121 and the flange 111, so that the connection therebetween is stable.

Alternatively, the other end of the lens holder 13 may be disposed in a square shape, and the outer shape of the flange 111 may also be disposed in a square shape, so as to further stabilize the lens holder 13 and the optical engine 11 and limit the relative rotation between the lens holder 13 and the optical engine 11.

Alternatively, as shown in fig. 4, the lens holder 12 and the additional lens 13 are respectively configured as concave-convex structures at the edges connected to each other, and the concave-convex structures of the two are concave-convex matched with each other, so as to limit the relative movement between the lens holder 12 and the additional lens 13, and make the connection between the two more stable.

Second embodiment: the lens holder 12 may be provided in a telescopic configuration. The number of the additional lenses 13 can be at least two, the lens supports 12 are arranged at intervals of at least two additional lenses, and the size of a projection picture is adjusted by changing the distance between the additional lenses 13, so that the application of different scenes is solved. The fixation between the additional lens 13 and the optical machine 11 may also be a detachable fixation as described in the above first embodiment.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a second embodiment of a projection apparatus according to the present application. The lens holder 12 may be in the shape of a telescopic sleeve, and specifically may include at least two sections of sub-tubes 121 telescopically sleeved. The sub-tube 121 at one end of the lens holder 12 is fixedly connected to the optical engine 11, for example, detachably connected as described in the first embodiment. At least two additional lenses 13 are fixed in different sub-tubes 121, wherein one additional lens 13 is fixed in the sub-tube 121 at the other end of the lens holder 12. At least two sections of sub-tubes 121 can move telescopically to change the distance between the additional lenses 13, so that the zooming effect can be realized. The number of the sub-tubes 121 of the lens holder 12 may be 2, 3, 5, or 5 or more, etc.

Through the telescopic sleeve between at least two sections of sub-tubes 121, when the sub-tubes 121 perform telescopic motion, the additional lens 13 can be driven to move, so that the distance between the additional lens 13 is changed, and the distance between at least part of the additional lens 12 and the optical machine 11 is changed, so that the zooming effect can be realized, the projection ratio of the emission light path of the optical machine 11 can be further changed, and the projection ratio of the whole projection equipment 10 is in an adjustable range.

Of course, the above-mentioned at least two segments of sub-tubes 121 may not be sleeved, and may be arranged in parallel and capable of moving relatively, so that similar telescopic effect may also be achieved, and further the projection ratio of the emission light path of the optical machine 11 is changed.

Third embodiment mode: in addition to the removable replacement of a different add lens 13, or a different add lens 13 and lens holder 12 combination, further changes in the throw ratio can be achieved by switching a different add lens 13 to be located in the emission light path.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a third embodiment of an embodiment of a projection apparatus according to the present application. Projection device 10 may further include a rotating support frame 16. The rotation support frame 16 may include a rotation lever 161 and a coupling portion 162 coupled to one end of the rotation lever 161. The support portion 112 is protruded from the outer circumference of the optical engine 11. The other end of the rotating rod 161 is rotatably connected to the supporting portion 112, and the rotating rod 161 extends from the supporting portion 112 toward the additional lens 13.

The number of lens holders 12 is at least two, and may be, for example, three, five lens holders 12. Each lens holder 12 is fixed to the connecting portion 162 in a one-to-one correspondence. An additional lens 13 is fixed to each lens holder 12. The rotating rod 161 can be used to rotate the connecting portion 162 by rotating, so as to switch different lens holders 12 and corresponding additional lenses 13 to be located in the emission light path of the optical engine 11. The rotation lever 161 may be driven by a motor or manually.

The lens holder 12 rotates into the emission light path of the optical engine 11, and the lens holder 12 and the optical engine 11 may be limited by a limiting member (not shown) so that the two can be kept stable. The limiting members are, for example, elastic pressing members pressed and held outside the lens holder 12 and the optical engine 11, the number of the limiting members may be at least two, the lens holder 12 and the optical engine 11 are pressed and held from different positions, and when different lens holders 12 need to be switched, the limiting members may rotate to avoid the switching of the lens holder 12.

Different additional lenses 13 may have different refractive indices. In this way, different additional lenses 13 are located in the emission light path of the optical engine 11, so that the projection ratio of the emission light path of the optical engine 11 can be changed, and the projection device 10 can have different projection ratios.

With the first to third embodiments described above, the lens holder 12 is operated correspondingly through the operation window of the housing 14, and the state of the lens holder 12 is changed. Referring to fig. 7, fig. 7 is a schematic perspective view of a projection apparatus according to another embodiment of the present disclosure. As shown in fig. 3 and 7, the housing 14 may be opened with an operation window 141. The operation window 141 may communicate with the inside of the housing 14 to enable a corresponding operation of the lens holder 12 through the operation window 141.

As shown in fig. 5, in the retractable sleeve structure of the lens holder 12 in the second embodiment, the sub-tube 121 of the lens holder 12 can be retracted through the operating window 141 to change the distance between the additional lenses 13 and the distance between at least a part of the lenses 13 and the optical engine 11. Similarly, the operation window 141 can also operate the lens holder 12 shown in the first embodiment or the third embodiment, so as to change the state of the lens holder 12, switch different lens holders 12 and corresponding additional lenses 13, and further change the projection ratio of the emission light path of the optical engine 11.

In summary, in the embodiment, the additional lens 13 is disposed on the emission light path of the optical engine 11 by using the lens support 12, and the emission light path is improved by passing through the additional lens 13, so that the projection ratio of the emission light path can be changed, and then different additional lenses 13 can be matched with the optical engine 11 according to requirements, so as to form the projection apparatus 10 with different projection ratios, thereby meeting the requirements of consumers and markets.

The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims (10)

1. The projection equipment is characterized by comprising an optical machine, a lens support and an additional lens, wherein the additional lens is fixedly connected with the optical machine through the lens support, and the additional lens is positioned in an emission light path of the optical machine so as to change the projection ratio of the emission light path of the optical machine.

2. The projection device of claim 1, wherein the additional lens is fixed to the lens holder, and the lens holder is detachably fixed to the optical engine.

3. The projection device of claim 2, wherein the lens holder is detachably connected to the optical engine by a snap-fit structure.

4. The projection apparatus according to claim 3, wherein the lens holder is disposed in a cylindrical shape, the additional lens is fixed to one end of the lens holder, the locking structure includes a locking portion disposed at the other end of the lens holder and a flange protruding from an outer periphery of one end of the optical engine, and the locking portion can be locked to the flange.

5. The projection device of claim 4, wherein the lens holder and the additional lens are fixed by glue dispensing.

6. The projection apparatus according to claim 2, wherein the number of the at least two additional lenses is at least two, and the at least two additional lenses are respectively fixed to a lens holder at intervals, the lens holder is fixed to the optical engine, and the lens holder is configured to be retractable to change a distance between the at least two additional lenses, so as to change a throw ratio of an emission light path of the optical engine.

7. The projection apparatus according to claim 6, wherein the lens holder is in a shape of a telescopic sleeve, and includes at least two sections of sub-tubes that are telescopically coupled, the sub-tube at one end of the lens holder is fixed to the optical engine, at least two of the additional lenses are fixed to different sub-tubes, one of the additional lenses is fixed to the sub-tube at the other end of the lens holder, and the at least two sections of sub-tubes can move telescopically to change a distance between the additional lens and the optical engine.

8. The projection apparatus according to claim 2, wherein the projection apparatus comprises a rotation support frame, the rotation support frame comprises a rotation rod and a connection portion connected to one end of the rotation rod, a support portion is convexly disposed on an outer periphery of the optical engine, the other end of the rotation rod is rotatably connected to the support portion, and the rotation rod extends from the support portion to the lens direction;

projection equipment includes at least two the lens support, wherein at least two the lens support interval is fixed in connecting portion, and every the lens support corresponds fixed one additional lens, the dwang is used for driving through rotating connecting portion are rotatory, and then switches differently lens support and corresponding additional lens are located in the emission light path of ray apparatus.

9. The projection apparatus according to any of claims 1-8, wherein the projection apparatus includes a housing, the housing defines a light hole, the optical engine and the lens holder are disposed in the housing, and the additional lens is exposed through the light hole to enable the emission light path of the optical engine to exit the housing, wherein the housing further defines an operation window, and the operation window is communicated with the interior of the housing to enable corresponding operation of the lens holder through the operation window.

10. A display device, comprising: a screen and the projection device of any of claims 1-9, the projection device being disposed on one side of the screen such that the projection device projects light onto the screen in a rear projection manner to display a picture on the other side of the screen.

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