阅读说明：本技术 光扩散模块及投影装置 (Light diffusion module and projection device ) 是由 陈韦豪 于 2020-04-27 设计创作，主要内容包括：一种光扩散模块,包括第一框体、扩散片及至少一第一悬吊臂。扩散片配置于第一框体内且具有光轴。第一悬吊臂连接于第一框体。至少一第一悬吊臂连接座体,第一框体借由至少一第一悬吊臂的弹性变形而沿第一轴线相对于座体往复移动。至少一第一悬吊臂沿第一轴线的方向上的距离小于至少一第一悬吊臂沿第二轴线的方向上的距离。第一轴线与第二轴线互相垂直,且第一轴线与第二轴线皆垂直于扩散片的光轴。还提供了包含所述光扩散模块的投影装置。所述光扩散模块和投影装置可有效避免悬吊臂产生非预期的旋转摆动。(A light diffusion module comprises a first frame body, a diffusion sheet and at least one first suspension arm. The diffusion sheet is arranged in the first frame and is provided with an optical axis. The first suspension arm is connected to the first frame. The first suspension arm is connected with the base body, and the first frame body moves back and forth relative to the base body along the first axis by means of elastic deformation of the first suspension arm. The distance of the at least one first suspension arm in the direction of the first axis is smaller than the distance of the at least one first suspension arm in the direction of the second axis. The first axis and the second axis are mutually vertical, and the first axis and the second axis are both vertical to the optical axis of the diffusion sheet. A projection device comprising the light diffusion module is also provided. The light diffusion module and the projection device can effectively prevent the suspension arm from generating unexpected rotary swing.)

1. A light diffusion module, comprising a first frame, a diffusion sheet and at least a first suspension arm, wherein:

the diffusion sheet is arranged in the first frame and is provided with an optical axis; and

the at least one first suspension arm is connected to the first frame, wherein the at least one first suspension arm is used for connecting a base, the first frame moves back and forth along a first axis relative to the base by virtue of elastic deformation of the at least one first suspension arm, wherein a distance of the at least one first suspension arm in a direction along the first axis is smaller than a distance of the at least one first suspension arm in a direction along a second axis, wherein the first axis and the second axis are perpendicular to each other, and the first axis and the second axis are perpendicular to the optical axis of the diffusion sheet.

2. The light diffusion module of claim 1, wherein the number of the at least one first suspension arm is two, and the two first suspension arms are respectively connected to two opposite sides of the first frame body.

3. The light diffusion module of claim 1, further comprising at least one set of driving elements, wherein the first frame is configured to move reciprocally along the first axis with respect to the base by the driving of the at least one set of driving elements.

4. The light diffusing module of claim 1, wherein the at least one first suspension arm comprises a rectangular section.

5. The light diffusing module of claim 1, wherein the at least one suspension arm includes two connecting sections and a curved section between the two connecting sections.

6. The light diffusing module of claim 5, wherein the curved section of the at least one first suspension arm extends in a direction perpendicular to the direction of extension of the two connecting sections.

7. The light diffusing module of claim 5, wherein the first frame body has two opposite surfaces, the two connecting sections of the at least one first suspension arm protrude from the surface of the first frame body, and the curved section of the at least one first suspension arm protrudes from the other surface of the first frame body.

8. The light-diffusing module of claim 1, further comprising at least one structural-reinforcing rib, wherein the at least one structural-reinforcing rib is formed between the at least one first suspension arm and the first frame body and/or between the at least one first suspension arm and the base body.

9. The light diffusion module of claim 1, wherein the first frame includes at least one structural reinforcing folded wall formed at an outer edge of the first frame and extending from the outer edge of the first frame in a direction parallel to the optical axis.

10. The light diffusing module of claim 1, further comprising a second frame and at least one second suspension arm, wherein the second frame is disposed in the first frame, the diffuser is disposed in the second frame, and the second frame is connected to the first frame by the at least one second suspension arm.

11. The light diffusion module of claim 10, wherein the second frame is configured to move back and forth along the second axis relative to the first frame and the base by elastic deformation of the at least one second suspension arm, and a distance of the at least one second suspension arm along the second axis is smaller than a distance of the at least one second suspension arm along the first axis.

12. The light diffusing module of claim 11, wherein the number of the at least one second suspension arm is two, and the two second suspension arms are respectively connected to two opposite sides of the second frame body.

13. The light diffusion module of claim 11, comprising at least one set of driving elements, wherein the at least one set of driving elements is disposed between the first frame and the second frame, and the second frame is configured to reciprocate along the second axis relative to the first frame and the base by the driving of the at least one set of driving elements.

14. The light diffusing module of claim 11, wherein the at least one second suspension arm comprises a rectangular section.

15. The light diffusing module of claim 11, wherein the at least one second suspension arm includes two connecting sections and a curved section between the two connecting sections.

16. The light diffusing module of claim 15, wherein the curved section of the at least one second suspension arm extends in a direction perpendicular to the direction of extension of the two connecting sections.

17. The light diffusing module of claim 15, wherein the second frame has two opposite surfaces, the two connecting sections of the at least one second suspension arm protrude from the surface of the second frame, and the curved section of the at least one second suspension arm protrudes from the other surface of the second frame.

18. The light diffusing module of claim 10, further comprising at least one structural reinforcing rib, wherein the at least one structural reinforcing rib is formed between the at least one second suspension arm and the first frame body and/or between the at least one second suspension arm and the second frame body.

19. The light diffusion module of claim 10, wherein the second frame includes at least one structural reinforcing folded wall formed at an outer edge of the second frame and extending from the outer edge of the second frame in a direction parallel to the optical axis.

20. A projection device, comprising a light source module, a light valve and a projection lens, wherein:

the light source module comprises a light source and a light diffusion module, wherein:

the light source is used for providing an illumination light beam; and

the light diffusion module comprises a first frame body, a diffusion sheet and at least one first suspension arm, wherein:

the diffusion sheet is arranged in the first frame and positioned on a transmission path of the illumination light beam, and the diffusion sheet is provided with an optical axis;

the at least one first suspension arm is connected to the first frame, wherein the at least one first suspension arm is used for connecting a base, the first frame moves back and forth along a first axis relative to the base by virtue of elastic deformation of the at least one first suspension arm, wherein the distance of the at least one first suspension arm in the direction of the first axis is smaller than the distance of the at least one first suspension arm in the direction of a second axis, wherein the first axis and the second axis are perpendicular to each other, and the first axis and the second axis are perpendicular to the optical axis of the diffusion sheet;

the light valve is used for converting the illumination light beam from the diffusion sheet into an image light beam; and

the projection lens is used for projecting the image light beam.

21. The projection apparatus of claim 20, wherein the light diffusion module further comprises a second frame and at least one second suspension arm, wherein the second frame is disposed in the first frame, the diffusion sheet is disposed in the second frame, and the second frame is connected to the first frame via the at least one second suspension arm,

the second frame body is configured to move back and forth along the second axis relative to the first frame body and the base body by elastic deformation of the at least one second suspension arm, and a distance of the at least one second suspension arm in a direction along the second axis is smaller than a distance of the at least one second suspension arm in a direction along the first axis.

22. The projection apparatus as claimed in claim 20, wherein the number of the at least one first suspension arm is two, and the two first suspension arms are respectively connected to two opposite sides of the first frame body.

23. The projection apparatus as claimed in claim 21, wherein the number of the at least one second suspension arm is two, and the two second suspension arms are respectively connected to two opposite sides of the second frame body.

24. The projection apparatus according to claim 21, wherein the light diffusion module includes at least one set of driving elements, wherein the first frame reciprocates along the first axis relative to the base by the driving of the at least one set of driving elements,

the second frame body is driven by another at least one group of driving elements to move back and forth relative to the first frame body and the base body along the second axis.

25. The projection device of claim 21, wherein the at least one first suspension arm and/or the at least one second suspension arm comprises a rectangular section.

26. The projection device of claim 21, wherein the at least one first suspension arm and/or the at least one second suspension arm comprises two connecting sections and a curved section between the two connecting sections.

27. The projection device of claim 26, wherein the curved section extends in a direction perpendicular to the direction of extension of the two connecting sections.

28. The projection apparatus according to claim 21, wherein the light diffusion module comprises at least one structural reinforcing rib formed between the at least one first suspension arm and the first frame body, between the at least one first suspension arm and the base, between the at least one second suspension arm and the first frame body, and/or between the at least one second suspension arm and the second frame body.

29. The projection apparatus according to claim 21, wherein the first frame and/or the second frame comprises at least one structurally reinforced folded wall formed at an outer edge of the first frame and/or the second frame and extending from the outer edge of the first frame and/or the second frame in a direction parallel to the optical axis.

Technical Field

The present invention relates to a light diffusion module and a projection apparatus, and more particularly, to a light diffusion module including a frame capable of moving back and forth and a projection apparatus having the same.

Background

A projection device is a display device for generating pictures. The projection device has an imaging principle that an illumination beam generated by a light source is converted into an image beam by a light valve, and the image beam is projected onto a screen or a wall by a lens.

When a laser is used as a light source of a projection apparatus, unevenness of a projection surface tends to cause a difference in optical path of a laser beam (laser beam) to cause a laser spot (laser spot) on a projection screen. In order to solve the above problems, some projection apparatuses have a diffusion sheet structure that can move back and forth to eliminate laser spots, and the deformation of the suspension arm is used to drive the diffusion sheet structure to move (move), because the rotation swing is not effective to eliminate the laser spots by using a transmissive diffusion sheet. In order to make the diffusion sheet structure have enough displacement, the suspension arm needs to be designed to be elongated, but the elongated suspension arm also causes the diffusion sheet structure to easily generate unexpected rotation swing to affect the projection quality.

The background section is only used to help the understanding of the present invention, and therefore the disclosure in the background section may include some known techniques which are not known to those skilled in the art. The statements in the "background" section do not represent a representation of the present disclosure or the problems associated with one or more embodiments of the present disclosure, but are to be understood or appreciated by those skilled in the art before filing the present application.

Disclosure of Invention

The invention provides a light diffusion module and a projection device, which can reduce the intensity of a suspension arm in the moving direction of a diffusion sheet, facilitate the movement of the diffusion sheet, increase the intensity of the suspension arm in the vertical direction and avoid the suspension arm from generating unexpected rotary swing.

Other objects and advantages of the present invention will be further understood from the technical features disclosed in the present invention.

In order to achieve one or a part of or all of the above or other objects, an embodiment of the invention provides a light diffusion module, including a first frame, a diffusion sheet, and at least one first suspension arm. The diffusion sheet is arranged in the first frame and has an optical axis. The first suspension arm is connected to the first frame. The first frame body is connected to the base body through at least one first suspension arm, and the first frame body moves back and forth relative to the base body along a first axis through elastic deformation of the at least one first suspension arm. The distance of the at least one first suspension arm along the first axis is smaller than the distance of the at least one first suspension arm along the second axis. The first axis and the second axis are mutually vertical, and the first axis and the second axis are both vertical to the optical axis of the diffusion sheet.

In order to achieve one or a part of or all of the above objectives or other objectives, an embodiment of the invention provides a projection apparatus including a light source module, a light valve, and a projection lens. The light source module comprises a light source and a light diffusion module, and the light source is used for providing illumination light beams. The light diffusion module comprises a first frame body, a diffusion sheet and at least one first suspension arm. The diffusion sheet is arranged in the first frame and positioned on the transmission path of the illumination light beam, and the diffusion sheet is provided with an optical axis. At least one first suspension arm is connected to the first frame. At least one first suspension arm is connected with a base. The first frame body moves back and forth along the first axis relative to the base body by means of elastic deformation of at least one first suspension arm. The distance of the at least one first suspension arm along the first axis is smaller than the distance of the at least one first suspension arm along the second axis. The first axis and the second axis are mutually vertical, and the first axis and the second axis are both vertical to the optical axis of the diffusion sheet. The light valve is used for converting the illumination light beam from the diffusion sheet into an image light beam. The projection lens is used for projecting image beams.

Based on the above, the embodiments of the invention have at least one of the following advantages or efficacies. In the light diffusion module of the present invention, the distance of the suspension arm in the direction of the corresponding movement axis is small, so that the structural strength of the suspension arm in the direction can be effectively reduced, and the suspension arm can generate enough deformation in the direction to facilitate the frame to move back and forth along the direction of the corresponding movement axis. In addition, the distance of the suspension arm in other directions is larger, so that the structural strength of the suspension arm in other directions can be effectively increased, and the suspension arm is prevented from generating unexpected rotary swing.

In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic view of a projection apparatus according to an embodiment of the invention.

Fig. 2 is a perspective view of the light diffusion module of fig. 1.

Fig. 3 and 4 are partially enlarged views of the light diffusion module of fig. 2.

Fig. 5 is a partial component perspective view of a light diffusion module according to another embodiment of the present invention.

Fig. 6 and 7 are partially enlarged views of the light diffusion module of fig. 5.

Fig. 8 is a partial component perspective view of a light diffusion module according to another embodiment of the present invention.

Fig. 9 and 10 are partially enlarged views of the light diffusion module of fig. 8.

Fig. 11 is a partial component perspective view of a light diffusion module according to another embodiment of the present invention.

Fig. 12 is a partial component perspective view of a light diffusion module according to another embodiment of the present invention.

Fig. 13 and 14 are partially enlarged views of the light diffusion module of fig. 12.

Detailed Description

The foregoing and other features and advantages of the invention will be apparent from the following, more particular description of preferred embodiments of the invention, as illustrated in the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting.

Fig. 1 is a schematic view of a projection apparatus according to an embodiment of the invention. Referring to fig. 1, a projection apparatus 100 of the present embodiment includes a light source module 110, a light valve 120, and a projection lens 130. The light source module 110 includes a light source 110a and a light diffusion module 110B, the light source 110a is, for example, a laser light source and is configured to provide an illumination light beam B1, and the light diffusion module 110B is configured to perform light diffusion on the illumination light beam B1 to eliminate a laser spot (laser spot). The light valve 120 is, for example, a digital micro-mirror device (DMD), a reflective Liquid Crystal On Silicon (LCOS), or a transmissive Liquid Crystal Panel (transmissive Liquid Crystal Panel). And the light valve 120 is used for converting the illumination beam B1 passing through the diffusion sheet 114 (shown in fig. 2) of the light diffusion module 110B into the image beam B2. The projection lens 130 is used for projecting the image light beam B2.

Fig. 2 is a perspective view of the light diffusion module of fig. 1. Referring to fig. 2, the light diffusion module 110b of the present embodiment includes a first frame 113, a second frame 112, a diffusion sheet 114, at least one first suspension arm 117 (two suspension arms are shown), and at least one second suspension arm 116 (two suspension arms are shown). The first frame 113, the second frame 112, the first suspension arm 117, and the second suspension arm 116 are, for example, integrally formed sheet metal structures (metal materials). A base 118 is connected to the first frame 113 via the first suspension arm 117. In addition, illumination beam B1 passes through diffuser 114 from above in FIG. 2.

The diffusion sheet 114 is disposed in the second frame 112, the second frame 112 and the diffusion sheet 114 therein are disposed in the first frame 113, and the diffusion sheet 114 is located on a transmission path of the illumination light beam B1 (shown in fig. 1). The two first suspension arms 117 are respectively connected to two opposite sides of the first frame 113, and the first frame 113 is connected to the base 118 by the first suspension arms 117. The first suspension arm 117 connects the first frame 113 and the base 118. The two second suspension arms 116 are respectively connected to two opposite sides of the second frame 112, and the second frame 112 is connected to the first frame 113 through the second suspension arms 116. The second suspension arm 116 connects the first frame 113 and the second frame 112.

The first frame 113 is reciprocated along the first axis a1 relative to the base 118 by elastic deformation of the first suspension arm 117, and the second frame 112 is reciprocated along the second axis a2 relative to the first frame 113 and the base 118 by elastic deformation of the second suspension arm 116, so that the diffusion sheet 114 in the second frame 112 diffuses the illumination beam B1 by reciprocating along the first axis a1 or the second axis a 2. The first axis a1 and the second axis a2 are perpendicular to each other, and the first axis a1 and the second axis a2 are both perpendicular to the optical axis OA of the diffusion sheet 114.

Fig. 3 and 4 are partially enlarged views of the light diffusion module of fig. 2. As shown in fig. 3, in the present embodiment, a distance T1 of the first suspension arm 117 in the direction of the first axis a1 (shown in fig. 2) is smaller than a distance L1 of the first suspension arm 117 in the direction of the second axis a2, a distance T1 of the first suspension arm 117 in the direction of the first axis a1 is smaller than a distance W1 of the first suspension arm 117 in the direction of the optical axis OA, a distance T2 of the second suspension arm 116 in the direction of the second axis a2 is smaller than a distance L2 of the second suspension arm 116 in the direction of the first axis OA, and a distance T2 of the second suspension arm 116 in the direction of the second axis a2 is smaller than a distance W2 of the second suspension arm 116 in the direction of the optical axis OA.

As described above, the distance T1 of the first suspending arm 117 in the direction of the corresponding moving axis (i.e., the first axis a1) is small, so that the structural strength of the first suspending arm 117 in the direction of the first axis a1 can be effectively reduced, the first suspending arm 117 can generate a sufficient amount of deformation in the direction of the first axis a1, and the first frame 113 can easily reciprocate in the direction of the first axis a 1. In addition, the distances L1 and W1 of the first suspending arm 117 in other directions are larger, so that the structural strength of the first suspending arm 117 in other directions can be effectively increased, and the first suspending arm 117 is prevented from generating unexpected rotation swing. The direction of the distance T1 of the first suspension arm 117 is parallel to the direction of the first axis a1 in which the diffusion sheet 114 is displaced.

Similarly, the distance T2 of the second suspension arm 116 in the direction of the corresponding moving axis (i.e., the second axis a2) is smaller, so that the structural strength of the second suspension arm 116 in the direction of the second axis a2 can be effectively reduced, and the second suspension arm 116 can generate a sufficient deformation amount in the direction of the second axis a2, so that the second frame 112 can easily reciprocate along the direction of the second axis a 2. In addition, the distances L2 and W2 of the second suspending arm 116 in other directions are larger, so that the structural strength of the second suspending arm 116 in other directions can be effectively increased to avoid the second suspending arm 116 from generating unexpected rotation swing.

Referring to fig. 2, the light diffusion module 110b of the present embodiment includes two sets of first driving elements 111 and two sets of second driving elements 115. Part of the first driving element 111 is disposed on the seat 118, part of the first driving element 111 is disposed on the first frame 113, and the first frame 113 is driven by the first driving element 111 to reciprocate relative to the seat 118 along the first axis a 1. The second driving element 115 is disposed between the first frame 113 and the second frame 112, and the second frame 112 is driven by the second driving element 115 to reciprocate relative to the first frame 113 along the second axis a 2. Specifically, each set of first driving elements 111 includes a magnet 111a and a coil 111 b. The coil 111b is disposed on the base 118, and the magnet 111a is disposed on the first frame 113, but the invention is not limited thereto, and the coil 111b is disposed on the first frame 113, and the magnet 111a is disposed on the base 118. The first frame 113 is driven to reciprocate by the magnetic force between the magnet 111a and the coil 111 b. Similarly, each set of the second driving element 115 includes a magnet 115a and a coil 115b, and the second frame 112 is driven to move back and forth by the magnetic force between the magnet 115a and the coil 115 b. The coil 115b is disposed on the base 118, and the magnet 115a is disposed on the second frame 112, but the invention is not limited thereto, and the coil 115b may be disposed on the second frame 112, and the magnet 115a may be disposed on the base 118.

In the present embodiment, the first suspension arm 117 includes a rectangular section as shown in fig. 2 and 3, and the second suspension arm 116 includes a rectangular section as shown in fig. 2 and 4. However, the present invention is not limited to the shapes of the first suspension arm 117 and the second suspension arm 116, and the following description refers to the accompanying drawings. Fig. 5 is a partial component perspective view of a light diffusion module according to another embodiment of the present invention. Fig. 6 and 7 are partially enlarged views of the light diffusion module of fig. 5. The embodiment shown in fig. 5 to 7 is different from the embodiment shown in fig. 2 to 4 in that the first suspension arm 117A shown in fig. 5 and 6 includes two connecting sections S1 and a curved section S2 between the two connecting sections S1, and the extending direction D1 of the curved section S2 is perpendicular to the extending direction D2 of the two connecting sections S1. By the provision of the curved section S2, the extension length of the first suspending arm 117A can be increased without increasing the distance of the first suspending arm 117A in the direction of the axis a2, to further enhance the deformability thereof. Similarly, the second suspension arm 116A of fig. 5 and 7 includes two connecting sections S3 and a curved section S4 between the two connecting sections S3, and the extending direction D3 of the curved section S4 is perpendicular to the extending direction D4 of the two connecting sections S3. By providing the curved section S4, the extension length of the second suspension arm 116A can be increased without increasing the distance of the second suspension arm 116A in the direction of the axis a1, to further enhance the deformability thereof.

Fig. 8 is a partial component perspective view of a light diffusion module according to another embodiment of the present invention. Fig. 9 and 10 are partially enlarged views of the light diffusion module of fig. 8. The difference between the embodiment shown in fig. 8 to 10 and the embodiment shown in fig. 5 to 7 is that the light diffusion module shown in fig. 8 and 9 further includes at least one structural reinforcing rib R1 (a plurality of ribs are shown), and the structural reinforcing rib R1 is formed between the first suspension arm 117A and the first frame 113 and/or between the first suspension arm 117A and the seat 118, so as to increase the structural strength of the first suspension arm 117A appropriately and prevent the first suspension arm 117A from generating unexpected rotational swing. Similarly, the light diffusion module of fig. 8 and 10 further includes at least one structural reinforcing rib R2 (shown as a plurality), the structural reinforcing rib R2 is formed between the second suspension arm 116A and the first frame 113 and/or between the second suspension arm 116A and the second frame 112, so as to increase the structural strength of the second suspension arm 116A properly and prevent the second suspension arm 116A from generating an unexpected rotation swing.

Fig. 11 is a partial component perspective view of a light diffusion module according to another embodiment of the present invention. The embodiment shown in fig. 11 is different from the embodiment shown in fig. 8 in that the first frame 113 of fig. 11 includes at least one structural reinforced folding wall 113a (shown as a plurality of walls), and the structural reinforced folding wall 113a is formed on the outer edge of the first frame 113 and extends from the outer edge of the first frame 113 along a direction parallel to the optical axis (the optical axis OA shown in fig. 2) to enhance the structural strength of the first frame 113. Similarly, the second frame 112 of fig. 11 includes at least one structural reinforced folded wall 112a (shown as a plurality), and the structural reinforced folded wall 112a is formed on an outer edge of the second frame 112 and extends from the outer edge of the second frame 112 along a direction parallel to the optical axis (the optical axis OA shown in fig. 2) to enhance the structural strength of the second frame 112.

Fig. 12 is a partial component perspective view of a light diffusion module according to another embodiment of the present invention. Fig. 13 and 14 are partially enlarged views of the light diffusion module of fig. 12. As shown in fig. 13 and 14, the first frame 113 has two opposing surfaces 113b and 113c, and the second frame 112 has two opposing surfaces 112b and 112 c. The difference between the embodiment shown in fig. 12 to 14 and the embodiment shown in fig. 11 lies in that the connecting section S1 'of the first suspension arm 117B of fig. 12 and 13 protrudes from the surface 113B of the first frame 113, and the curved section S2' of the first suspension arm 117B protrudes from the other surface 113c of the first frame 113, so as to avoid that the connecting section S1 'and the curved section S2' both protrude in the same direction and excessively increase the thickness of the whole structure of the light diffusion module. Similarly, the connecting section S3 'of the second suspension arm 116B in fig. 12 and 14 protrudes from the surface 112B of the second frame 112, and the curved section S4' of the second suspension arm 116B protrudes from the other surface 112c of the second frame 112, so as to avoid the connecting section S3 'and the curved section S4' protruding in the same direction and increasing the overall thickness.

In summary, the embodiments of the invention have at least one of the following advantages or effects. In the light diffusion module of the invention, the distance of the suspension arm in the direction of the corresponding movement axis is smaller, so that the structural strength of the suspension arm in the direction can be effectively reduced, and the suspension arm can generate enough deformation in the direction to facilitate the frame to reciprocate along the direction of the corresponding movement axis. In addition, the distance of the suspension arm in other directions is larger, so that the structural strength of the suspension arm in other directions can be effectively increased, and the suspension arm is prevented from generating unexpected rotary swing.

However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereby, and all the simple equivalent changes and modifications made by the claims and the summary of the invention are still included in the scope of the present invention. It is not necessary for any embodiment or claim of the invention to address all of the objects, advantages, or features disclosed herein. In addition, the abstract and the title of the invention are provided for assisting the search of patent documents and are not intended to limit the scope of the invention. Furthermore, the terms "first", "second", and the like in the description or the claims are used only for naming elements (elements) or distinguishing different embodiments or ranges, and are not used for limiting the upper limit or the lower limit on the number of elements.

Description of reference numerals:

100: projection device

110: light source module

110 a: light source

110 b: light diffusion module

111: first drive element

111a, 115 a: magnet

111b, 115 b: coil

112: second frame body

112a, 113 a: structure reinforced folding wall

112b, 112c, 113b, 113 c: surface of

113: first frame body

114: diffusion sheet

115: second drive element

116. 116A, 116B: second suspension arm

117. 117A, 117B: first suspension arm

118: base body

120: light valve

130: projection lens

A1: first axis

A2: second axis

B1: illuminating light beam

B2: image light beam

D1, D2, D3, D4: direction of extension

L1, L2, T1, T2, W1, W2: distance between two adjacent plates

OA: optical axis

R1, R2: structural reinforcing rib

S1, S1 ', S2, S2': connecting section

S3, S3 ', S4, S4': a curved section.