Actuating device and projector

Abstract

The invention provides an actuating device which is used for enabling an image light beam to pass through. The actuating device comprises a frame body, an optical element, a light-transmitting element and a driving assembly. The frame includes a first frame portion, a second frame portion, and a shaft portion. The first frame part is connected with the second frame part through the shaft part. The second frame portion has a through groove. The through groove has a first opening and a second opening. The first frame portion is located in the first opening. The optical element is disposed on the first frame portion and located in the first opening. The light-transmitting element is arranged on the second frame part, located in the second opening and used for sealing the second opening. The image beam sequentially passes through the optical element located in the first opening and the light-transmitting element located in the second opening. The driving assembly is arranged on the frame body and drives the first frame part to rotate by taking the shaft part as a rotating shaft, so that the first frame part drives the optical element to swing back and forth relative to the second frame part. By means of the design, the actuating device has the dustproof effect.

Description

Technical Field

[0001] The invention relates to an actuating device and a projector, and in particular to an actuating device with dustproof effect and a projector using the actuating device. Background Art

[0002] Generally speaking, if the optical machine of the projector needs to be dustproof, a dustproof glass structure will be added to the outside of the optical machine near the lens so that dust will not enter the inside of the optical machine when the lens is replaced. If the optical machine is equipped with an actuator, this actuator will be placed between the prism assembly and the dustproof glass structure to ensure the dustproof effect. The current dustproof glass structure mainly includes a dustproof cover and a dustproof glass. If there is no dustproof cover, the required dustproof glass size needs to be larger than the optical machine opening. Therefore, by adding a dustproof cover, it is only necessary to leave the light path to pass through the required opening size, which can effectively reduce the size of the dustproof glass. However, whether increasing the size of the dustproof glass or adding a dustproof cover will significantly increase the production cost of the projector.

[0003] The "background technology" section is only used to help understand the content of the present invention. Therefore, the content disclosed in the "background technology" section may contain some prior art that is not known to those skilled in the art. The content disclosed in the "background technology" section does not mean that the content or the problem to be solved by one or more embodiments of the present invention has been known or recognized by those skilled in the art before the application of the present invention. Summary of the invention

[0004] The present invention provides an actuating device which has a light-transmitting element with dust-proof effect, which can omit a component (such as a dust cover) in the prior art and does not need to increase the size of the dust-proof glass, thereby effectively reducing the cost.

[0005] The present invention also provides a projector, which includes the actuating device, which can save manufacturing costs.

[0006] Other purposes and advantages of the present invention can be further understood from the technical features disclosed in the present invention.

[0007] To achieve one or part or all of the above purposes or other purposes, one embodiment of the present invention provides an actuating device for allowing an image beam to pass through. The actuating device includes a frame, an optical element, a light-transmitting element and a driving component. The frame includes a first frame portion, a second frame portion and an axis portion. The first frame portion is connected to the second frame portion by the axis portion. The second frame portion has a through groove. The through groove has a first opening and a second opening. The first frame portion is located in the first opening. The optical element is arranged in the first frame portion and is located in the first opening. The light-transmitting element is arranged in the second frame portion and is located in the second opening and is used to close the second opening. The image beam passes through the optical element located in the first opening and the light-transmitting element located in the second opening in sequence. The driving component is arranged on the frame, and the driving component drives the first frame portion to rotate with the axis portion as the rotating shaft, so that the first frame portion drives the optical element to swing back and forth relative to the second frame portion.

[0008] To achieve one or part or all of the above purposes or other purposes, one embodiment of the present invention provides a projector, which includes an illumination system, an optical mechanical component, a projection lens and an actuator. The illumination system is used to provide an illumination beam. The optical mechanical component is used to convert the illumination beam into an image beam. The projection lens is used to project the image beam out of the projector. The actuator is arranged between the optical mechanical component and the projection lens to allow the image beam to pass through. The actuator includes a frame, an optical element, a light-transmitting element and a driving component. The frame includes a first frame portion, a second frame portion and an axis portion. The first frame portion is connected to the second frame portion by the axis portion. The second frame portion has a through groove. The through groove has a first opening and a second opening. The first frame portion is located in the first opening. The optical element is arranged in the first frame portion and is located in the first opening. The light-transmitting element is arranged in the second frame portion and is located in the second opening and is used to close the second opening. The image beam passes through the optical element located in the first opening and the light-transmitting element located in the second opening in sequence. The second frame portion and the light-transmitting element close the light-exiting side opening of the optical mechanical component. The driving component is arranged on the frame body, and the driving component drives the first frame part to rotate with the shaft part as the rotating shaft, so that the first frame part drives the optical element to swing back and forth relative to the second frame part.

[0009] Based on the above, the embodiments of the present invention have at least one of the following advantages or effects. In the design of the actuator of the present invention, the optical element is arranged in the first frame portion of the frame body and is located in the first opening, and the light-transmitting element is arranged in the second frame portion of the frame body and is located in the second opening and is used to close the second opening. By setting the light-transmitting element, the actuator itself can have a dust-proof effect, which can omit a component (such as a dust cover) in the prior art and does not need to increase the size of the dust-proof glass, thereby effectively reducing the cost. In addition, a projector using the actuator of the present invention can save production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1is a schematic diagram of a projector according to an embodiment of the present invention.

[0011] Figure 2A yes Figure 1 A schematic top view of the optical-mechanical components and the actuator device of the projector.

[0012] Figure 2B yes Figure 2A A three-dimensional schematic diagram of an actuating device.

[0013] Figure 2C Yes Remove Figure 2A A three-dimensional schematic diagram of the actuating device behind the light-transmitting element.

[0014] Figure 2D is along Figure 2A A cross-sectional view of line II.

[0015] Figure 3A It is a top view schematic diagram of an optical-mechanical assembly and an actuating device according to an embodiment of the present invention.

[0016] Figure 3B Yes Remove Figure 3A A three-dimensional schematic diagram of the actuating device behind the light-transmitting element.

[0017] Figure 3C is along Figure 3A Cross-sectional view along line II-II.

[0018] Figure 3D yes Figure 3B A three-dimensional diagram of the other side.

[0019] Reference numerals list

[0020] 10: Projector

[0021] 20: Lighting system

[0022] 30: Optical and mechanical components

[0023] 40: Projection lens

[0024] 100a, 100b: Actuating device

[0025] 110a, 110b: frame

[0026] 112, 112': first frame portion

[0027] 112a: Another shaft portion

[0028] 112b: Framework

[0029] 114, 114': second frame

[0030] 115, 115': shaft

[0031] 120: Optical components

[0032] 130: Light-transmitting element

[0033] 140, 140', 140": Drive components

[0034] 141: Coil

[0035] 142: Magnet

[0036] 150, 170: Dust-proof parts

[0037] 160, 180: Fixing parts

[0038] C:Through groove

[0039] C1: First opening

[0040] C2: Second opening

[0041] L1: illumination beam

[0042] L2: Image beam

[0043] P: Supporting platform

[0044] S1: First surface

[0045] S2: second surface. DETAILED DESCRIPTION

[0046] The above and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the drawings. The directional terms (e.g., up, down, left, right, front or back, etc.) mentioned in the following embodiments are only referenced to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention.

[0047] Figure 1 is a schematic diagram of a projector according to an embodiment of the present invention. Figure 1 In this embodiment, the projector 10 includes an illumination system 20, an optical component 30, a projection lens 40, and an actuator 100a. The illumination system 20 is used to provide an illumination beam L1. The optical component 30 is used to convert the illumination beam L1 into an image beam L2. The projection lens 40 is used to project the image beam L2 from the optical component 30 out of the projector 10. The actuator 100a is disposed between the optical component 30 and the projection lens 40, and at least part of the components of the actuator 100a are located on the transmission path of the image beam L2, so as to guide the image beam L2 from the optical component 30 to the projection lens 40.

[0048] In detail, the lighting system 20 used in the present embodiment has a light-emitting element, such as a laser diode (LD), such as a laser diode array (LD Bank). Specifically, any light source that meets the volume requirements in actual design can be implemented, and the present invention is not limited to this. The lighting system 20, for example, also includes one or more lenses, dichroic mirrors, reflectors, light uniformity elements (such as compound eye lenses or integrating columns), filter wheels, phosphor wheels and / or light diffusion elements (diffusers) and other optical elements to generate color lights with different wavelengths. These color lights are transmitted to the optical machine component 30 as illumination light beams L1 in different time sequences. The optical machine component 30, for example, is composed of a prism, a light valve and a plurality of different types of optical elements to receive the illumination light beam L1 provided by the lighting system 20. The prism is, for example, a total internal reflection prism (TIR prism), and the light valve is, for example, a reflective light modulator such as a Liquid Crystal On Silicon panel (LCoS panel), a Digital Micro-mirror Device (DMD), etc. In one embodiment, the light valve may also be a transmissive light modulator such as a Transparent Liquid Crystal Panel, an Electro-Optical Modulator, a Magneto-Optic modulator, an Acousto-Optic Modulator (AOM), etc., but the present embodiment does not limit the type and kind of the light valve. The method of the light valve of the optical-mechanical assembly 30 modulating the illumination light beam L1 into the image light beam L2, the detailed steps and implementation methods can be sufficiently taught, suggested and implemented by the common knowledge in the relevant technical field, and therefore will not be repeated. In addition, the projection lens 40 includes, for example, a combination of one or more optical lenses with refractive power, such as various combinations of non-planar lenses such as biconcave lenses, biconvex lenses, concave-convex lenses, convex-concave lenses, plano-convex lenses, and plano-concave lenses. In one embodiment, the projection lens 40 may also include a planar optical lens to convert the image beam L2 from the optical machine component 30 into a projection beam by reflection or penetration and project it out of the projector 10. Here, this embodiment does not limit the type and type of the projection lens 40.

[0049] Figure 2A yes Figure 1 A schematic top view of the optical-mechanical components and the actuator of a projector. Figure 2B yes Figure 2A A three-dimensional schematic diagram of an actuating device. Figure 2CYes Remove Figure 2A A three-dimensional schematic diagram of the actuating device behind the light-transmitting element. Figure 2D is along Figure 2A A cross-sectional view of line II.

[0050] Please also refer to Figure 2A , Figure 2B , Figure 2C as well as Figure 2D In the present embodiment, the actuator 100a includes a frame 110a, an optical element 120, a light-transmitting element 130 and a driving assembly 140. The frame 110a includes a first frame portion 112, a second frame portion 114 and an axis portion 115. The first frame portion 112 is connected to the second frame portion 114 by the axis portion 115. The second frame portion 114 has a through groove C. The through groove C has a first opening C1 and a second opening C2. In the present embodiment, the first frame portion 112 is located in the first opening C1. In other embodiments, the first frame portion 112 can be configured in the through groove C and located between the first opening C1 and the second opening C2. The optical element 120 is configured in the first frame portion 112. In the present embodiment, the light-transmitting element 130 is configured in the second frame portion 114, and is located in the second opening C2 and is used to close the second opening C2. Image beam L2 (please refer to Figure 1 ) sequentially passes through the optical element 120 located in the first opening C1 and the light-transmitting element 130 located in the second opening C2. That is, the optical element 120 faces the inside of the optical machine, that is, the optical element 120 is closer to the optical machine assembly 30 than the light-transmitting element 130 (please refer to Figure 1 ), and the light-transmitting element 130 is outside the optical machine, and the light-transmitting element 130 is closer to the projection lens 40 than the optical element 120 (please refer to Figure 1 The second frame portion 114 and the light-transmitting element 130 seal the light-emitting side opening 32 of the optical-mechanical assembly 30 (see Figure 2A and Figure 2D), thereby enabling the actuator 100a to obtain the dust-proof effect inside the optical machine. To further explain, the optical machine component 30 is, for example, disposed in an optical machine housing (not numbered), and the optical machine housing is provided with an opening for allowing the image light beam from the light valve to be transmitted from the opening of the optical machine housing (i.e., the light-emitting side opening 32) to the actuator 100a. Here, the light-transmitting element 130 is, for example, transparent glass for dust prevention. The shaft portion 115 is, for example, two elements disposed on the same axis (not shown) and respectively disposed on two opposite sides of the first frame portion 112 for connecting the second frame portion 114. The driving component 140 is disposed on the frame body 110a, and the driving component 140 drives the first frame portion 112 to rotate with the shaft portion 115 as the rotating axis, so that the first frame portion 112 drives the optical element 120 to swing back and forth relative to the second frame portion 114. Here, the actuator 100a is a uniaxial actuator, wherein the driving component 140 includes, for example, a voice coil motor, but is not limited thereto. In this embodiment, a portion of the driving components of the driving component 140 is located in the first frame portion 112 (for example, a portion of the coil), and another portion of the driving components is located in the second frame portion 114 (for example, a portion of the magnet and the circuit board). Under the action of the magnet and the coil, the first frame portion 112 is further made to swing back and forth with the shaft portion 115 as the rotation axis.

[0051] For further information, please refer to Figure 2C In this embodiment, the through groove C penetrates the first surface S1 and the second surface S2 of the second frame portion 114, wherein the first opening C1 is an opening located on the first surface S1, and the second opening C2 is an opening located on the second surface S2. Figure 2C and Figure 2D , the actuating device 100a of this embodiment also includes a dustproof member 150. The inner wall of the through groove C includes a supporting platform P adjacent to the second opening C2, and the supporting platform P, for example, extends toward the center of the through groove C, wherein the dustproof member 150 is arranged between the supporting platform P and the light-transmitting element 130. To explain in more detail, the supporting platform P, for example, is provided with a groove (unnumbered), and the groove, for example, surrounds the through groove C and the dustproof member 150, for example, is arranged in the groove. Here, the dustproof member 150 corresponds to the supporting platform P, and is, for example, rectangular or annular, and its material is, for example, foam or rubber, but is not limited thereto. Furthermore, refer to Figure 2A and Figure 2D The projector 100a of this embodiment further includes a dustproof member 170, which is disposed at the light-emitting side opening 32 of the optical engine assembly 30 and is located, for example, between the optical engine housing and the second frame portion 114. Here, the dustproof member 170 is, for example, rectangular or annular, and its material is, for example, foam or rubber, but is not limited thereto.

[0052] In addition, please refer to Figure 2A, the actuator 100a of this embodiment further includes a plurality of fixing members 160, wherein the light-transmitting element 130 is fixed to the second frame portion 114 by means of the plurality of fixing members 160. Here, the fixing member 160 is, for example, a spring, a screw or a bolt. In addition, the projector 100a further includes a plurality of fixing members 180, wherein the second frame portion 114 is fixed to the light-emitting side opening 32 of the optical-mechanical assembly 30 by means of the plurality of fixing members 180. In this embodiment, these fixing members 180 are, for example, arranged at the edge of the second frame portion 140, and in other embodiments, they can be arranged at other positions of the second frame portion 140 as long as they do not affect the operation of the actuator 100a. Here, the fixing member 180 is, for example, a spring, a screw or a bolt.

[0053] In short, by disposing the light-transmitting element 130, the actuator 100a itself can have a dustproof effect, that is, the actuator 100a can be used as a dustproof structure, a component (such as a dustproof cover) in the prior art can be omitted, and the size of the dustproof glass can be reduced, that is, the size of the dustproof glass does not need to be increased, thereby effectively reducing the cost. In addition, the projector 10 using the actuator 100a of this embodiment can save the manufacturing cost.

[0054] Other embodiments will be listed below for illustration. It must be noted that the following embodiments use the component numbers and some contents of the previous embodiments, wherein the same or similar numbers are used to represent the same or similar components, and the description of the same technical contents is omitted. The description of the omitted parts can be referred to the previous embodiments, and the following embodiments will not be repeated.

[0055] Figure 3A It is a top view schematic diagram of an optical-mechanical assembly and an actuating device according to an embodiment of the present invention. Figure 3B Yes Remove Figure 3A A three-dimensional schematic diagram of the actuating device behind the light-transmitting element. Figure 3C is along Figure 3A Cross-sectional view along line II-II. Figure 3D yes Figure 3B The other side is a three-dimensional diagram. Please also refer to Figure 2C , Figure 3A , Figure 3B , Figure 3C and Figure 3DThe actuator 100b of this embodiment is similar to the actuator 100a described above, and the main difference between the two is that the actuator 100b in this embodiment is an actuator with a dual-axis vibration function, that is, in addition to the shaft portion 115' connected between the first frame portion 112' and the second frame portion 114', the first frame portion 112' of the frame 110b of the actuator 100b also includes another shaft portion 112a and a frame 112b. The optical element 120 is disposed on the frame 112b. The other shaft portion 112a is, for example, two elements arranged on the same axis (not shown) and respectively arranged on two opposite sides of the frame 112b, and extends from the frame 112b and is connected to the first frame portion 112', wherein the axis corresponding to the other shaft portion 112a and the axis corresponding to the shaft portion 115' are, for example, perpendicular to each other. The driving components of the actuator 100b in this embodiment include, for example, driving components 140' and 140" disposed at different positions, wherein the driving component 140" is disposed on the frame 110b and is disposed adjacent to the first frame portion 112', wherein the driving component 140" is used to drive the first frame portion 112' to rotate with the shaft portion 115' as the rotation axis, so that the first frame portion 112' drives the frame 112b and the optical element 120 located on the frame 112b to move back and forth relative to the second frame portion 114'. The driving component 140' is disposed on the frame 110b and is located between the frame 112b and the first frame portion 112', wherein the driving component 140' is used to drive the frame 112b to rotate with the other shaft portion 112a as the rotation axis, so that the frame 112b drives the optical element 120 to swing back and forth relative to the first frame portion 112'. Here, the actuator 100b is embodied as a dual-axis actuator, and the driving components 140', 140" are, for example, voice coil motors or piezoelectric materials, but are not limited thereto. In this embodiment, a portion of the driving elements of the driving assembly 140', 140" is located in the first frame portion 112' (for example, the magnet 142), and another portion of the driving elements is located in the second frame portion 114' (for example, the coil 141 and the circuit). Under the action of the magnet and the coil, the first frame portion 112' is further made to swing back and forth with the shaft portion 115' as the rotation axis, and the frame 112b is made to swing back and forth with the other shaft portion 112a as the rotation axis. In addition, in this embodiment, except for the portion where the first frame portion 112' and the second frame portion 114' are connected by the shaft portion 115', there is a gap between the other portions of the first frame portion 112' and the second frame portion 114', that is, the first frame portion 112' and the second frame portion 114' are only connected by the shaft portion 115'.

[0056] In summary, the embodiments of the present invention have at least one of the following advantages or effects. In the design of the actuator of the present invention, the optical element is arranged in the first frame portion of the frame body and is located in the first opening, and the light-transmitting element is arranged in the second frame portion of the frame body and is located in the second opening and is used to close the second opening. By setting the light-transmitting element, the actuator itself can have a dust-proof effect, which can omit a component (such as a dust cover) in the prior art and does not need to increase the size of the dust-proof glass, thereby effectively reducing the cost. In addition, a projector using the actuator of the present invention can save production costs.

[0057] The above description is only a preferred embodiment of the present invention, and it cannot be used to limit the scope of the implementation of the present invention. That is, all simple equivalent changes and modifications made in accordance with the claims of the present invention and the specification of the present invention are still within the scope of the patent of the present invention. In addition, any embodiment or claim of the present invention is not required to achieve all the purposes, advantages or features disclosed in the present invention. In addition, the abstract of the specification and the name of the invention are only used to assist in the retrieval of patent documents, and are not used to limit the scope of rights of the present invention. In addition, the terms "first", "second", etc. mentioned in this specification or claims are only used to name the name of the element or distinguish different embodiments or scopes, and are not used to limit the upper or lower limit of the number of elements.

Claims

1. An actuator for allowing an image beam to pass through, characterized in that: The actuating device comprises a frame, an optical element, a light-transmitting element and a driving assembly, wherein: The frame body includes a first frame portion, a second frame portion and an axis portion, the first frame portion is connected to the second frame portion via the axis portion, the second frame portion has a through groove, the through groove has a first opening and a second opening, and the first frame portion is located in the first opening; The optical element is configured in the first frame portion and is located in the first opening; The light-transmitting element is disposed on the second frame portion and is located in the second opening and is used to close the second opening, wherein the image light beam sequentially passes through the optical element located in the first opening and the light-transmitting element located in the second opening; and The driving assembly is disposed on the frame body, and the driving assembly drives the first frame portion to rotate with the shaft portion as a rotation axis, so that the first frame portion drives the optical element to swing back and forth relative to the second frame portion.

2. The actuating device according to claim 1, characterized in that: The actuating device further comprises: A dustproof part, the inner wall of the through groove includes a supporting platform connected to the second opening, and the dustproof part is arranged between the supporting platform and the light-transmitting element.

3. The actuating device according to claim 1, characterized in that: The actuating device further comprises: A plurality of fixing members, wherein the light-transmitting element is fixed to the second frame portion by the plurality of fixing members.

4. The actuating device according to claim 3, characterized in that: The plurality of fixing members include a plurality of spring leaves, a plurality of screws or a plurality of bolts.

5. The actuating device according to claim 1, characterized in that: The driving component includes a voice coil motor or a piezoelectric material.

6. The actuating device according to claim 1, characterized in that: The first frame portion also includes another shaft portion and a frame, the optical element is configured on the frame, the other shaft portion extends from the frame and is connected to the first frame portion, and the driving component also drives the frame to rotate with the other shaft portion as a rotating axis, so that the frame drives the optical element to swing back and forth relative to the first frame portion.

7. A projector, characterized in that: The projector comprises an illumination system, an optical-mechanical assembly, a projection lens and an actuating device, wherein: The lighting system is used to provide a lighting beam; The optical-mechanical assembly is used to convert the illumination light beam into an image light beam; The projection lens is used to project the image beam out of the projector; and The actuator is disposed between the optical machine component and the projection lens to allow the image light beam to pass through. The actuator includes a frame, an optical element, a light-transmitting element, and a driving component, wherein: The frame body includes a first frame portion, a second frame portion and an axis portion, the first frame portion is connected to the second frame portion via the axis portion, the second frame portion has a through groove, the through groove has a first opening and a second opening, and the first frame portion is located in the first opening; The optical element is configured in the first frame portion and is located in the first opening; The light-transmitting element is disposed on the second frame portion, and is located in the second opening and used to close the second opening, wherein the image light beam sequentially passes through the optical element located in the first opening and the light-transmitting element located in the second opening, wherein the second frame portion and the light-transmitting element close the light-emitting side opening of the optical machine component; and The driving assembly is disposed on the frame body, and the driving assembly drives the first frame portion to rotate with the shaft portion as a rotation axis, so that the first frame portion drives the optical element to swing back and forth relative to the second frame portion.

8. The projector according to claim 7, characterized in that: The actuating device further comprises: A dustproof part, the inner wall of the through groove includes a supporting platform connected to the second opening, and the dustproof part is arranged between the supporting platform and the light-transmitting element.

9. The projector according to claim 7, characterized in that: The actuating device further comprises: A plurality of fixing members, wherein the light-transmitting element is fixed to the second frame portion by the plurality of fixing members.

10. The projector according to claim 9, characterized in that The plurality of fixing members include a plurality of spring leaves, a plurality of screws or a plurality of bolts.

11. The projector according to claim 7, characterized in that: The driving component includes a voice coil motor or a piezoelectric material.

12. The projector according to claim 7, characterized in that: The projector also includes: A dustproof member is disposed between the light-emitting side opening of the optical machine component and the second frame portion.

13. The projector according to claim 7, characterized in that: The projector also includes: A plurality of fixing members, the outer periphery of the second frame portion is fixed to the light-emitting side opening of the optical-mechanical component by means of the plurality of fixing members.

14. The projector according to claim 7, characterized in that: The first frame portion also includes another shaft portion and a frame, the optical element is configured on the frame, the other shaft portion extends from the frame and is connected to the first frame portion, and the driving component also drives the frame to rotate with the other shaft portion as a rotating axis, so that the frame drives the optical element to swing back and forth relative to the first frame portion.

Images