Optical member driving device, and projection type image display system including the same

Abstract

To provide a small-size optical member driving device capable of changing the posture of optical components.SOLUTION: An optical member driving device 20 includes: an optical member 24 on which light is incident; and multiple actuators 26A-26D that shift different portions of an outer periphery of the optical member 24 in a traveling direction of light just before incidence. Each of the actuators 26A-26D includes: an arm 30 that rotates on the rotation center lines Ca-Cd extending in a direction perpendicular to the traveling direction and supports the optical member 24 at one end 30a; a conductor 36 that is provided on the other end 30b of the arm 30 and extends in a direction from the other end 30b to the one end 30a of the arm 30, and through which current flows; and magnet pairs 40 and 42 that are provided to sandwich the other end 30b of the and arm 30 with a gap and generate a magnetic field in a direction crossing an extending direction of the conductor 36.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to an optical member driving device that shifts the projection position of image light and a projection type image display device including the same.

Background Art

[0002] For example, Patent Document 1 discloses an optical member driving device that shifts an image by changing the attitude of a parallel plate glass through which image light passes. This optical member driving device has a connecting portion having one end that rotatably supports the parallel plate glass. Each of the plurality of connecting portions supports a different portion of the outer peripheral edge of the parallel plate glass. Further, each of the plurality of connecting portions rotates about a rotation center line passing through its central portion. Furthermore, the other end of each of the plurality of connecting portions is shifted by a movable portion of an actuator that strokes in the traveling direction of the light immediately before passing through the parallel plate glass.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the case of the optical member driving device described in Patent Document 1, since the movable portion of the actuator strokes in the traveling direction of the light, the optical member driving device becomes large, particularly the size in the traveling direction of the light becomes large.

[0005] Therefore, an object of the present disclosure is to reduce the size of an optical member driving device that changes the attitude of an optical member.

Means for Solving the Problems

[0006] In order to solve the above problems, according to one aspect of the present disclosure, An optical member onto which light is incident, a plurality of actuators that respectively shift the traveling directions of light immediately before the light is incident on different portions of the outer peripheral edge of the optical member, and each of the actuators rotates about a rotation center line extending in a direction orthogonal to the traveling direction, and has an arm that supports the optical member at one end, a conductor that is provided at the other end of the arm, extends in a direction from the other end of the arm toward the one end, and through which an electric current flows, and a magnet pair that is provided so as to sandwich the other end of the arm with a gap therebetween and generates a magnetic field in a direction intersecting the extending direction of the conductor, are included, and an optical member driving device is provided.

[0007] Further, according to another aspect of the present disclosure, a light source, a light modulation element that converts light from the light source into video light, the above-described optical member driving device onto which the video light from the light modulation element is incident, and a projection lens that projects the video light emitted from the optical member driving device, are included, and a projection type video display device is provided.

Advantages of the Invention

[0008] According to the present disclosure, it is possible to miniaturize an optical member driving device that changes the posture of an optical member.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6A

Figure 6B

Figure 7

Mode for Carrying Out the Invention

[0010] An optical member driving device according to one aspect of the present disclosure includes an optical member into which light is incident, and a plurality of actuators that shift the light in the traveling direction of the light immediately before the light enters different portions of the outer peripheral edge of the optical member. Each of the actuators rotates about a rotation center line extending in a direction orthogonal to the traveling direction, and includes an arm that supports the optical member at one end, a conductor that is provided at the other end of the arm and extends in a direction from the other end to the one end of the arm and through which an electric current flows, and a magnet pair that is provided so as to sandwich the other end of the arm with a gap therebetween and generates a magnetic field in a direction intersecting the extending direction of the conductor.

[0011] According to such an aspect, it is possible to miniaturize an optical member driving device that changes the posture of an optical member.

[0012] For example, the conductor may be a coil including a first linear portion extending from the other end to the one end of the arm and a second linear portion extending in parallel with the first linear portion. In this case, the magnet pair includes a first magnet pair provided so as to sandwich the first linear portion and generating a magnetic field in a direction intersecting the extending direction of the first linear portion, and a second magnet pair provided so as to sandwich the second linear portion and generating a magnetic field in a direction opposite to the direction of the magnetic field of the first magnet pair.

[0013] For example, the optical member driving device may have a plurality of elastic members that connect the optical member and one ends of the plurality of arms, respectively.

[0014] For example, the optical member may be circular in the direction of travel view, and a plurality of actuators may be provided at intervals of 90 degrees in the direction of travel view.

[0015] For example, the optical member may be a parallel plate glass through which light passes.

[0016] In addition, a projection type video display device according to another aspect of the present disclosure includes a light source, a light modulation element that converts light from the light source into video light, the above-described optical member driving device into which the video light from the light modulation element is incident, and a projection lens that projects the video light emitted from the optical member driving device.

[0017] According to such an aspect, the projection type video display device can be miniaturized.

[0018] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. However, a more detailed description than necessary may be omitted. For example, a detailed description of well-known matters and a redundant description of substantially the same configuration may be omitted. This is to avoid making the following description unnecessarily redundant and to facilitate understanding by those skilled in the art.

[0019] Note that the accompanying drawings and the following description are provided for those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

[0020] Hereinafter, an optical member driving device according to an embodiment of the present disclosure will be described with reference to the drawings.

[0021] FIG. 1 is a schematic configuration diagram of an example of a projection type video display device equipped with an optical member driving device according to an embodiment of the present disclosure. The X-Y-Z orthogonal coordinate system shown in FIG. 1 is for facilitating understanding of the embodiment of the present disclosure and does not limit the present disclosure. In the X-Y-Z axis coordinate system, the X-axis direction indicates the width direction of the image projected by the projection type video display device, the Y-axis direction indicates the height direction of the image, and the Z-axis direction indicates the projection direction of the projection type video display device.

[0022] As shown in FIG. 1, in an example of a projection type video display device 10, a housing 12, a light source 14 provided in the housing 12, a light modulation element 16 provided in the housing 12 for converting light L from the light source 14 into video light Lm, and a projection lens 18 for projecting the video light onto a screen S. An optical member driving device 20 is disposed between the light modulation element 16 and the projection lens 18. The projection type video display device 10 has optical members (not shown) such as mirrors and prisms between the light source 14 and the light modulation element 16 and between the light modulation element 16 and the optical member driving device 20.

[0023] FIG. 2 is a perspective view of an optical member driving device according to an embodiment. FIG. 3 is a top view of the optical member driving device, and FIG. 4 is a partial cross-sectional view of the optical member driving device in a state where video light is transmitted.

[0024] As shown in FIG. 3, the optical member driving device 20 includes a base portion 22, an optical member 24 on which the video light Lm is incident, and a plurality of actuators 26A to 26D for changing the posture of the optical member 24.

[0025] The base portion 22 of the optical member driving device 20 functions as a bracket for attaching the optical member driving device 20 to the housing 12 of the projection type video display device 10. The base portion 22 includes a through hole 22a through which the video light from the light modulation element 16 passes.

[0026] In the case of this embodiment, the optical member 24 is a parallel plate glass through which the video light Lm passing through the through hole 22a of the base portion 22 is transmitted. Further, as shown in FIG. 3, the optical member 24 is circular in a view of the traveling direction (Z-axis direction) of the video light Lm immediately before it enters the parallel member 24, and is attached to the support frame 28.

[0027] The plurality of actuators 26A to 26D are provided on the base portion 22 and support the support frame 28 to which the optical member 24 is attached. The plurality of actuators 26A to 26D have substantially the same configuration.

[0028] Each of the plurality of actuators 26A to 26D includes an arm 30 and a bearing 32 that rotatably supports the arm 30.

[0029] Each arm 30 of the plurality of actuators 26A to 26D includes one end 30a that supports the optical member 24 and the other end 30b. The arm 30 is rotatably supported by the bearing 32 at a portion between the one end 30a and the other end 30b. Specifically, each arm 30 of the plurality of actuators 26A to 26D rotates about a rotation center line Ca to Cd that extends in a direction orthogonal to the traveling direction (Z-axis direction) of the video light Lm immediately before entering the optical member 24. In the case of the present embodiment, the rotation center lines Ca and Cb of the arms 30 of the actuators 26A and 26B are parallel to each other, and the rotation center lines Cc and Cd of the arms 30 of the actuators 26C and 26D are parallel to each other.

[0030] As shown in FIG. 3, one end 30a of each arm 30 of the plurality of actuators 26A to 26D supports different portions of the outer peripheral edge of the optical member 24. In the case of the present embodiment, different portions of the support frame 28 that supports the optical member 24 are supported by one end 30a of each arm 30 of the plurality of actuators 26A to 26D. Further, in the case of the present embodiment, each of the plurality of actuators 26A to 26D is provided at intervals of 90 degrees in the viewing direction of the traveling direction (Z-axis direction) of the video light Lm immediately before entering the optical member 24. That is, the actuators 26A and 26B face each other in the width direction (X-axis direction) with the optical member 24 interposed therebetween, and the actuators 26C and 26D face each other in the height direction (Y-axis direction) with the optical member 24 interposed therebetween.

[0031] Further, in the case of the present embodiment, as shown in FIG. 2, one end 30a of each arm 30 of the plurality of actuators 26A to 26D supports the optical member 24 via an elastic member 34. The elastic member 34 is, for example, a U-shaped spring. Note that, instead of the elastic member 34, one end 30a of the arm 30 and the optical member 24 may be connected via a ball joint or the like.

[0032] Further, each of the plurality of actuators 26A to 26D includes a conductor 36 through which an electric current flows and a magnetic field generation unit 38 that generates a magnetic field.

[0033] As shown in FIG. 4, the conductor 36 is provided at the other end 30b corresponding to the force point of the arm 30 of each of the plurality of actuators 26A to 26D. In the case of the present embodiment, the conductor 36 is a coil having a winding axis parallel to the rotation center lines Ca to Cd of the arm 30. Further, the conductor 36 includes a plurality of first linear portions 36a extending from the other end 30b of the arm 30 toward the one end 30a, and a plurality of second linear portions 36b extending parallel to the first linear portions 36b. Therefore, when an electric current flows through the conductor 36, the direction of the electric current flow in the first linear portion 36a is opposite to the direction of the electric current flow in the second linear portion 36b.

[0034] FIG. 5 is a diagram showing the structure of the magnetic field generation unit.

[0035] As shown in FIG. 5, the magnetic field generation unit 38 includes a plurality of magnets 40 to 46. In the case of the present embodiment, the magnets 40 and 42 form a pair (first magnet pair), and the magnets 44 and 46 form a pair (second magnet pair).

[0036] The pair of magnets 40 and 42 is provided so as to sandwich the other end 30b of the arm 30 with a gap therebetween. Thereby, a plurality of first linear portions 36a of the conductor 36 provided at the other end 30b of the arm 30 exist between the magnets 40 and 42. In the case of the present embodiment, the pairs of the magnets 40 and 42 in each of the plurality of actuators 26A to 26D face in the extending direction of the rotation center lines Ca to Cd of the arm 30. Thereby, the pair of magnets 40 and 42 generates a magnetic field M1 in a direction intersecting the extending direction of the first linear portion 36a.

[0037] The pair of magnets 44 and 46 is provided so as to sandwich the other end 30b of the arm 30 with a gap therebetween. As a result, a plurality of second linear portions 36b of the conductor 36 provided at the other end 30b of the arm 30 exist between the magnets 44 and 46. In the case of the present embodiment, the pairs of magnets 44 and 46 in the plurality of actuators 26A to 26D face each other in the extending direction of the rotation center lines Ca to Cd of the arm 30. Thereby, the pair of magnets 44 and 46 generates a magnetic field M2 in a direction intersecting the extending direction of the second linear portion 36b. In the case of the present embodiment, the magnet 44 is arranged at a distance from the magnet 40 in the projection direction (Z-axis direction), and the magnet 46 is arranged at a distance from the magnet 42 in the projection direction.

[0038] As shown in FIG. 5, the direction of the magnetic field M1 generated by the pair of magnets 40 and 42 and the direction of the magnetic field M2 generated by the pair of magnets 44 and 44 are opposite to each other. Thereby, when an electric current flows through the conductor 36, a driving force acts on the other end 30b of the arm 30.

[0039] For example, when a control device (not shown) of the projection type video display device 10 supplies an electric current to the conductor 36 in the actuator 26A, as shown in FIG. 5, an electric current flows through the plurality of first linear portions 36a of the conductor 36, and an electric current also flows through the second linear portion 36b. At this time, electric currents flowing in opposite directions flow through the first linear portion 36a and the second linear portion 36b. In FIG. 5, an electric current flowing from the front of the drawing toward the depth direction flows through the first linear portion 36a, and an electric current flowing in the opposite direction flows through the second linear portion 36b.

[0040] According to Fleming's left-hand rule, a force in a direction approaching the base portion 22 is applied to the first linear portion 36a of the conductor 36 in the magnetic field M1. Similarly, a force in a direction approaching the base portion 22 is also applied to the second linear portion 36b of the conductor 36 in the magnetic field M2 in the direction opposite to the direction of the magnetic field M1. As a result, a driving force Fd for shifting the end portion 30b toward the base portion 22 is generated at the end portion 30b of the arm 30. As a result, the arm 30 rotates about the rotation center line Ca. When an electric current in the reverse direction flows through the conductor 36, a driving force in the reverse direction is generated.

[0041] In the case of this embodiment, a Hall sensor 48 is provided on each of the arms 30 of the plurality of actuators 26A to 26D. Specifically, as shown in FIG. 4, when no current flows through the conductor 36, the Hall sensor 48 is provided at the end 30b of the arm 30 so as to be located between the magnets 40 and 44 (between the magnets 42 and 46) in the extending direction view of the rotation center lines Ca to Cd of the arm 30. Therefore, when no current flows through the conductor 36, the Hall sensor 48 exists at a position between the magnetic fields M1 and M2, that is, at a position where the magnetic fields M1 and M2 cancel each other out. Also, when current flows through the conductor 36, it approaches one of the magnetic fields M1 and M2. Therefore, based on the detected value of the magnetic field of the Hall sensor 48, a control device (not shown) of the projection type video display device 10 can confirm the inclination state of the arm 30.

[0042] So far, the configuration of the optical member driving device 20 has been described. From here, the operation of the optical member driving device 20 will be described.

[0043] FIG. 6A is a partial cross-sectional view of the optical member driving device in a state where the video light is shifted in one direction in the width direction. FIG. 6B is a partial cross-sectional view of the optical member driving device in a state where the video light is shifted in the other direction in the width direction.

[0044] As shown in FIGS. 6A and 6B, a control device (not shown) of the projection type video display device 10 performs synchronous control on the actuators 26A and 26B, and performs the same synchronous control on the actuators 26C and 26D. Therefore, the operations of the actuators 26A and 26B will be described in detail, and the description of the operations of the actuators 26A and 26B will be omitted.

[0045] As shown in FIG. 6A, in order to shift the video light Lm by a distance dw in the width direction (X-axis direction) toward the actuator 26A side (left side in the drawing), the control device (not shown) of the projection type video display device 10 outputs a control current to the conductors (coils) 36 of the actuators 26A and 26B, respectively.

[0046] When a current flows through the conductor 36 of the actuator 26A, a driving force Fu is generated, causing the arm 30 of the actuator 26A to rotate about the rotation center line Ca (rotating clockwise in the drawing), and the other end 30b thereof to shift in a direction away from the base portion 22. As a result, one end 30a of the arm 30 of the actuator 26A approaches the base portion 22, and the portion of the parallel plate glass 24 supported by the one end 30a shifts in a direction approaching the base portion 22 by a distance ds.

[0047] At the same time, when a current flows through the conductor 36 of the actuator 26B, a driving force Fd is generated, causing the arm 30 of the actuator 26B to rotate about the rotation center line Cb (rotating clockwise in the drawing), and the other end 30b thereof to shift in a direction approaching the base portion 22. As a result, one end 30a of the arm 30 of the actuator 26B moves away from the base portion 22, and the portion of the parallel plate glass 24 supported by the one end 30a shifts in a direction away from the base portion 22 by a distance ds.

[0048] Due to the synchronous operation of the actuators 26A and 26B in this way, the parallel plate glass 24 tilts from the neutral state shown in FIG. 4 toward the actuator 26A side (left side in the drawing). As a result, the image light Lm shifts by a distance dw toward the actuator 26A side (left side in the drawing) in the width direction (X-axis direction).

[0049] Also, as shown in FIG. 6B, the control device (not shown) of the projection type image display device 10 outputs a control current to the conductors (coils) 36 of the actuators 26A and 26B respectively in order to shift the image light Lm by a distance dw in the width direction (X-axis direction) toward the actuator 26B side (right side in the drawing).

[0050] When current flows through the conductor 36 of the actuator 26A, a driving force Fd is generated, and the arm 30 of the actuator 26A rotates about the rotation center line Ca (rotates counterclockwise in the drawing), and the other end 30b thereof shifts in a direction approaching the base portion 22. As a result, one end 30a of the arm 30 of the actuator 26A moves away from the base portion 22, and the portion of the parallel plate glass 24 supported by the one end 30a shifts in a direction away from the base portion 22 by a distance ds.

[0051] At the same time, when current flows through the conductor 36 of the actuator 26B, a driving force Fu is generated, and the arm 30 of the actuator 26B rotates about the rotation center line Cb (rotates counterclockwise in the drawing), and the other end 30b thereof shifts in a direction away from the base portion 22. As a result, one end 30a of the arm 30 of the actuator 26B approaches the base portion 22, and the portion of the parallel plate glass 24 supported by the one end 30a shifts in a direction approaching the base portion 22 by a distance ds.

[0052] By such synchronous operation of the actuators 26A and 26B, the parallel plate glass 24 tilts from the neutral state shown in FIG. 4 toward the actuator 26B side (right side in the drawing). As a result, the image light Lm shifts toward the actuator 26B side (right side in the drawing) by a distance dw in the width direction (X-axis direction).

[0053] The control device (not shown) of the projection type image display device 10 alternately and repeatedly executes the operations of the actuators 26A and 26B shown in FIGS. 6A and 6B at high speed. At the same time, the same repeated high-speed operations are also executed for the actuator 26C and the actuator 26D. Thereby, the control device of the projection type image display device 10 quadruples the density of the pixels of the image projected on the screen S. Specifically, due to the high-speed repeated operations of the above-described actuators 26A, 26B, 26C, and 26D, the parallel flat glass 24 quickly tilts in four directions on the actuator 26A side, 26B side, 26C side, and 26D side in order. Thereby, four images shifted by 1 / 2 of the pixel in the width direction (X-axis direction) and the height direction (Y-axis direction) are substantially simultaneously output from the parallel flat glass 24 (that is, the distance dw is 1 / 4 of the pixel). As a result, the image projected on the screen S is made to have a higher resolution.

[0054] According to the above-described embodiment, the optical member driving device 20 that changes the posture of the optical member 24 can be miniaturized. In particular, the size in the traveling direction (Z-axis direction) of the image light Lm immediately before entering the optical member 24 can be reduced. Thereby, the space between the light modulation element 16 and the projection lens 18 where the optical member driving device 20 is disposed can be reduced, and as a result, the projection type image display device 10 is miniaturized.

[0055] The present disclosure has been described above by way of the above-described embodiments, but the embodiments of the present disclosure are not limited thereto.

[0056] For example, in the case of the above-described embodiment, as shown in FIG. 3, the arms 30 of the plurality of actuators 26A to 26D each extend linearly in the radial direction of the circular optical member 24. However, the embodiments of the present disclosure are not limited thereto.

[0057] FIG. 7 is a top view of an optical member driving device according to another embodiment.

[0058] As shown in FIG. 7, in the optical member driving device 120 according to another embodiment, the arms 130 of the plurality of actuators 126A to 126D each extend in the tangential direction of the circular optical member 24 and are bent. Even such an arm 130 can change the posture of the optical member 24 in the same manner as the arm 30 of the above-described embodiment. Further, according to such an arm 130, the size of the base portion 122, particularly the size in the width direction (X-axis direction) and the height direction (Y-axis direction), can be reduced. That is, the optical member driving device 120 and the projection type video display device including the same can be miniaturized.

[0059] Also, in the case of the above-described embodiment, as shown in FIG. 2, the optical member driving device has four actuators 26A to 26D. However, the embodiment of the present disclosure is not limited to this. For example, even with three actuators, it is possible to tilt the optical member in four directions.

[0060] Furthermore, in the case of the above-described embodiment, as shown in FIG. 4, the conductor 36 that generates the driving force for shifting the end portion 30b of the arm 30 is a coil, but the embodiment of the present disclosure is not limited to this. That is, as long as an electric current flows in a direction intersecting the direction of the magnetic field, the conductor is not limited to a coil.

[0061] Furthermore, in the case of the above-described embodiment, as shown in FIG. 4, the optical member 24 whose posture is changed by the optical member driving device 20 is a parallel flat glass. However, the embodiment of the present disclosure does not limit the optical member to parallel flat glass. The optical member may be a mirror that reflects the incident light.

[0062] In addition, in the case of the above-described embodiment, as shown in FIG. 1, the optical member driving device 20 is used in the projection type video display device 10. However, the embodiment of the present disclosure is not limited to this. The optical member driving device can be used in a device other than the projection type video display device, that is, a device that needs to change the posture of the optical member.

[0063] That is, in a broad sense, an embodiment of the present disclosure includes an optical member on which light is incident, and a plurality of actuators that shift the traveling directions of light immediately before the light is incident on different portions of the outer peripheral edge of the optical member. Each of the actuators rotates about a rotation center line extending in a direction orthogonal to the traveling direction, and includes an arm that supports the optical member at one end, a conductor that is provided at the other end of the arm, extends in a direction from the other end of the arm toward the one end, and through which an electric current flows, and a magnet pair that is provided so as to sandwich the other end of the arm with a gap therebetween and generates a magnetic field in a direction intersecting the extending direction of the conductor. This is an optical member driving device.

[0064] In another broad sense, an embodiment of the present disclosure is a projection-type video display device including a light source, a light modulation element that converts light from the light source into video light, the above-described optical member driving device on which the video light from the light modulation element is incident, and a projection lens that projects the video light emitted from the optical member driving device.

[0065] As described above, the above embodiments have been described as examples of the technology in the present disclosure. For this purpose, drawings and detailed descriptions have been provided. Therefore, among the components described in the drawings and the detailed description, not only the components essential for solving the problems but also the components not essential for solving the problems may be included for exemplifying the above technology. Therefore, it should not be immediately determined that those non-essential components are essential just because they are described in the drawings and the detailed description.

[0066] In addition, since the above embodiments are for exemplifying the technology in the present disclosure, various changes, replacements, additions, omissions, etc. can be made within the scope of the claims or the equivalent scope thereof.

Industrial Applicability

[0067] The present disclosure is applicable to devices that need to change the posture of an optical member.

Explanation of Reference Numerals

[0068] 20 Optical member driving device 24 Optical member 26A Actuator 26B Actuator 26C Actuator 26D Actuator 30 Arm 30a One end 30b The other end 40 Magnet 42 Magnet Ca Rotation center line Cb Rotation center line Cc Rotation center line Cd Rotation center line

Claims

1. An optical member onto which light is incident, and a plurality of actuators that shift the traveling directions of light immediately before the light is incident on different portions of the outer peripheral edge of the optical member, respectively. Each of the actuators has an arm that rotates about a rotation center line extending in a direction orthogonal to the traveling direction and supports the optical member at one end, a conductor that is provided at the other end of the arm, extends in a direction from the other end of the arm toward the one end, and through which an electric current flows, and a pair of magnets that are provided so as to sandwich the other end of the arm with a space therebetween and generate a magnetic field in a direction intersecting the extending direction of the conductor. An optical member driving device.

2. The conductor is a coil including a first linear portion extending from the other end of the arm toward the one end and a second linear portion extending parallel to the first linear portion, and the pair of magnets includes a first pair of magnets that are provided so as to sandwich the first linear portion and generate a magnetic field in a direction intersecting the extending direction of the first linear portion, and a second pair of magnets that are provided so as to sandwich the second linear portion and generate a magnetic field in a direction opposite to the direction of the magnetic field of the first pair of magnets. The optical member driving device according to claim 1.

3. The optical member driving device according to claim 1 or 2, further comprising a plurality of elastic members that connect the optical member and one ends of the plurality of arms, respectively.

4. The optical member is circular in shape when viewed in the traveling direction, and the plurality of actuators are provided at intervals of 90 degrees when viewed in the traveling direction. The optical member driving device according to any one of claims 1 to 3.

5. The optical member is a parallel flat glass through which light passes. The optical member driving device according to any one of claims 1 to 4.

6. A light source, a light modulation element that converts light from the light source into video light, the optical member driving device according to any one of claims 1 to 5 onto which the video light from the light modulation element is incident, and a projection lens that projects the video light emitted from the optical member driving device. A projection type video display device.

Images