Projector

Abstract

To provide a projector that can remove even a slight amount of dust attached to plate members of a louver.SOLUTION: A projector has: a light source device that has a light source that emits light; a light modulation device that modulates the light emitted from the light source device to form a projection image; a projection lens that projects the projection image as an enlarged image; a housing that accommodates the light source device and the light modulation element; a fan that sucks in gas from an opening provided in the housing to cool the inside of the housing; a louver that is provided in the opening, and that includes a plurality of plate members extending in a first direction and holding members arranged in plurality in a second direction orthogonal to the first direction and holding both ends of the plate members; and an excitation device that vibrates the plate members in a direction orthogonal to the first direction.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a projector.

Background Art

[0002] A projector capable of removing dust deposited on a louver is described in Patent Document 1. The projector of this document includes a case in which an opening is formed, a first louver member attached to the opening and having a plurality of slits formed therein, a second louver member disposed inside the case from the first louver member and having ridge portions at positions corresponding to the respective slits of the first louver member, and slits formed between the respective ridge portions, and a fan disposed inside the case from the second louver member and taking in air from the outside into the inside of the case. The first louver member is disposed at a position substantially parallel to the second louver member via a spring, and is provided so as to be movable in a direction approaching and away from the second louver member.

[0003] When dust accumulates on the first louver member, the pressure loss in the first louver member increases, so the first louver member is attracted toward the second louver member against the biasing force of the spring. Since the ridge portions corresponding to the respective slits enter the respective slits of the attracted first louver member, the dust deposited on the first louver member is removed. When the dust deposited on the first louver member is removed, the pressure loss in the first louver member decreases, so the first louver member moves away from the second louver member by the biasing force of the spring.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the projector of Patent Document 1, unless dust accumulates until the pressure loss in the first louver member increases, the dust deposited on the first louver member cannot be removed. For this reason, there is a problem that dust cannot be removed frequently. Further, if the amount of air taken in by the fan is increased, the pressure loss in the first louver member increases. Therefore, even when dust does not sufficiently accumulate on the first louver member, dust can be removed by increasing the amount of air taken in by the fan, but there is a problem that a large load is applied to the fan.

Means for Solving the Problems

[0006] In order to solve the above problems, the projector of the present invention includes a light source device having a light source that emits light, a light modulation element that modulates the light emitted from the light source device to form a projection image, a projection lens that projects the projection image as an enlarged image, a housing that houses the light source device and the light modulation element, a fan that sucks gas from an opening provided in the housing to cool the inside of the housing, a louver provided in the opening, the louver including a plurality of plate members extending in a first direction, and a holding member that holds both ends of the plurality of plate members arranged in a second direction orthogonal to the first direction, and a vibration device that vibrates the plate members in a direction orthogonal to the first direction.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Embodiments for Carrying Out the Invention

[0008] Hereinafter, with reference to the drawings, a projector according to an embodiment of the present invention will be described.

[0009] (Embodiment 1) FIG. 1 is an external perspective view of the projector of Embodiment 1. FIG. 2 is a view showing the internal configuration of the projector of Embodiment 1. FIG. 3 is a view of the louver seen from inside the projector of Embodiment 1. FIG. 4 is an A-A cross-sectional view of FIG. 3.

[0010] As shown in Fig. 1, the projector 1 includes a housing 5 that constitutes the exterior of the projector 1. As shown in Fig. 1, the housing 5 is formed in a substantially rectangular parallelepiped shape. Also, as shown in Figs. 2 and 3, the projector 1 includes a light source device 2, a light modulation element 3 that modulates the light emitted from the light source device 2 to form a projection image, a projection lens 4 that projects the projection image as an enlarged image, a fan 6 that sucks gas from an opening 55 provided in the housing 5 to cool the inside of the housing 5, a louver 7 provided at the opening 55, a vibration device 8 that vibrates the louver 7, a mounting portion 9 for attaching the louver 7 to the opening 55, a control unit 10, and a power supply device 11. The housing 5 houses the light source device 2, the light modulation element 3, the projection lens 4, the fan 6, the control unit 10, and the power supply device 11.

[0011] Here, in the following description, three mutually orthogonal directions are defined as the X-axis direction, the Y-axis direction, and the Z-axis direction, respectively. The X-axis direction is the direction along the optical axis N of the projection lens 4. The Z-axis direction is the vertical direction. In the X-axis direction, the direction in which the projection lens 4 projects an enlarged image is the X1 direction, and the opposite direction is the X2 direction. In the Z-axis direction, the upward direction is the Z1 direction, and the downward direction is the Z2 direction.

[0012] As shown in Figs. 1 and 2, the housing 5 is formed in a substantially rectangular parallelepiped shape. The opening 55 is provided in the side wall portion 51 of the housing 5 in the Y2 direction. The control unit 10 controls the light source device 2, the light modulation element 3, the fan 6, the vibration device 8, etc. The power supply device 11 supplies power to the light source 20 of the light source device 2, the light modulation element 3, the fan 6, the vibration device 8, and the control unit 10.

[0013] As shown in FIG. 2, the light source device 2 includes a light source 20, an illumination optical system 21, and a separation optical system 30. The light source 20 is composed of, for example, an ultra-high pressure mercury lamp, a solid light source, or the like. The illumination optical system 21 includes a first integrator lens 22, a second integrator lens 23, a polarization conversion element 24, and a superimposing lens 25. The first integrator lens 22 divides the light beam from the light source 20 into a plurality of beams and condenses the light beam near the second integrator lens 23. The polarization conversion element 24 converts the light from the second integrator lens 23 into predetermined linearly polarized light. The superimposing lens 25 emits the light rays emitted from the polarization conversion element 24 toward the separation optical system 30.

[0014] The separation optical system 30 includes a first dichroic mirror 31, a reflection mirror 32, and a field lens 33R. The first dichroic mirror 31 reflects the R light, which is a part of the light rays incident from the superimposing lens 25, and transmits the G light and the B light, which are parts of the light rays incident from the superimposing lens 25. The R light reflected by the first dichroic mirror 31 enters the optical modulation element 3R through the reflection mirror 32 and the field lens 33R.

[0015] The separation optical system 30 includes a second dichroic mirror 34 and a field lens 33G. The second dichroic mirror 34 reflects the G light, which is a part of the light rays from the first dichroic mirror 31, and transmits the B light, which is a part of the light rays from the first dichroic mirror 31. The G light reflected by the second dichroic mirror 34 enters the optical modulation element 3G through the field lens 33G.

[0016] The separation optical system 30 includes a relay lens 35, a reflection mirror 36, a relay lens 37, a reflection mirror 38, and a field lens 33B. The B light transmitted through the second dichroic mirror 34 enters the optical modulation element 3B through the relay lens 35, the reflection mirror 36, the relay lens 37, the reflection mirror 38, and the field lens 33B.

[0017] As shown in FIG. 2, the optical modulation element 3 operates under the control of the control unit 10 based on an external image signal such as a video signal. Three optical modulation elements 3 are provided. In this embodiment, the optical modulation element 3 is a liquid crystal panel. The optical modulation element 3R forms a red projection image by modulating R light according to the image signal. The optical modulation element 3G forms a green projection image by modulating G light according to the image signal. The optical modulation element 3B forms a blue projection image by modulating B light according to the image signal.

[0018] As shown in FIG. 2, a dichroic prism 40 is provided between the optical modulation element 3 and the projection lens 4. The optical modulation element 3R, the optical modulation element 3G, and the optical modulation element 3B surround the dichroic prism 40 from three directions. The dichroic prism 40 is a prism for light synthesis and synthesizes the light modulated by each optical modulation element 3.

[0019] As shown in FIG. 2, the projection lens 4 projects the projection image formed by modulating the optical modulation element 3 as an enlarged image toward the screen S. As shown in FIGS. 2 and 4, the fan 6 cools the heat-generating parts inside the housing 5 by generating an air flow. The heat-generating parts include the light source 20 of the light source device 2, the optical components of the light source device 2, the optical modulation element 3, the control unit 10, and the power supply device 11, etc. In this embodiment, as shown in FIG. 2, the fan 6 is arranged in the X1 direction of the light source device 2 and cools the optical components of the light source device 2 and the optical modulation element 3. As shown in FIG. 4, the fan 6 includes a filter 65 arranged between the fan 6 and the louver 7. The filter 65 removes the dust contained in the gas by filtering the gas taken in from the opening 55. Note that the number of fans 6 is not limited to one, and a plurality of fans may be provided. For example, in FIG. 2, the projector 1 may further include a fan 6 for cooling the light source 20 of the light source device 2 and a fan 6 for cooling the power supply device 11.

[0020] The louver 7 is replaceable with respect to the opening 55 by the mounting portion 9. As shown in FIGS. 2 to 4, the louver 7 includes a plurality of plate members 71 extending in the Z-axis direction (first direction), and a holding member 72 that holds both ends of the plurality of plate members 71 arranged in the X-axis direction (second direction). The plurality of plate members 71 are arranged at equal intervals in the X-axis direction. The plate member 71 is made of plastic, hard rubber, or the like. In this embodiment, the cross-sectional shape of the plate member 71 is rectangular. Note that the cross-sectional shape of the plate member 71 can be a shape such as a rectangle, an ellipse, or a circle.

[0021] The plate member 71 is processed to exhibit at least one of the functions of water repellency and oil repellency. In this embodiment, a fluorine-containing treatment agent that exhibits both the functions of water repellency and oil repellency is applied to the plate member 71. Note that examples of the process for exhibiting the water repellency function include coating processes such as a silicone range and a silicone oligomer. Examples of the process for exhibiting the oil repellency function include coating processes such as a fluororesin.

[0022] The holding member 72 is made of plastic, hard rubber, or the like. The holding member 72 includes a first holding portion 76 that holds the end portion of the plate member 71 in the Z1 direction, and a second holding portion 77 that holds the end portion of the plate member 71 in the Z2 direction. The first holding portion 76 and the second holding portion 77 are members extending in the X-axis direction. Here, the plate member 71 and the holding member 72 may be the same material or different materials. The plate member 71 and the holding member 72 may each be made of plastic. Further, the plate member 71 may be made of hard rubber, and the holding member 72 may be made of plastic. Note that when the plate member 71 and the holding member 72 are made of the same material, the plate member 71 and the holding member 72 may be integrally formed.

[0023] As shown in FIGS. 3 and 4, the mounting portion 9 includes a first fixing portion 91 for fixing the first holding portion 76 and a second fixing portion 92 for fixing the second holding portion 77. In this embodiment, the first fixing portion 91 forms a recess 910 into which the first holding portion 76 fits. The second fixing portion 92 forms a recess 920 into which the second holding portion 77 fits. The first holding portion 76 is restricted from moving in the Z1 direction, X1 direction, and X2 direction by fitting into the recess 910. The second holding portion 77 is restricted from moving in the Z2 direction, X1 direction, and X2 direction by fitting into the recess 920. In the X-axis direction, a cushioning material 57 is disposed between the first holding portion 76 and the first fixing portion 91, and between the second holding portion 77 and the second fixing portion 92. The cushioning material 57 is a member having elasticity such as sponge, elastomer, or rubber.

[0024] Here, as a method of attaching the louver 7, when the first fixing portion 91 is provided on the upper case of the housing 5 and the second fixing portion 92 is provided on the lower case of the housing 5, when assembling the upper case and the lower case in the Z-axis direction, the louver 7 is attached to the opening 55 by being sandwiched in the Z-axis direction between the first fixing portion 91 and the second fixing portion 92. Further, when the first fixing portion 91 is fixed to the inner peripheral surface of the side wall portion 51 by screws or the like, after fitting the second holding portion 77 into the recess 920, with the first holding portion 76 sandwiched by the first fixing portion 91, by fixing the first fixing portion 91 to the inner peripheral surface of the side wall portion 51 by screws or the like, the louver 7 is attached to the opening 55. In this case, the second fixing portion 92 may be integrally provided on the inner peripheral surface of the side wall portion 51, or may be fixed to the inner peripheral surface of the side wall portion 51 by screws or the like.

[0025] As shown in FIGS. 3 and 4, the vibration device 8 vibrates the plate member 71 in the X-axis direction and the Y-axis direction. In this embodiment, the vibration device 8 is a piezoelectric element 80. The piezoelectric element 80 is fixed to the inner peripheral surface of the side wall portion 51 in the Z2 direction of the louver 7. Note that the position where the piezoelectric element 80 is fixed is not limited to the inner peripheral surface of the side wall portion 51 in the Z2 direction of the louver 7. The position where the piezoelectric element 80 is fixed may be the inner peripheral surface of the side wall portion 51 in the Z1 direction of the louver 7, the inner peripheral surface of the top plate portion 52 of the housing 5, or the bottom plate portion 53 of the housing 5. As long as the piezoelectric element 80 can vibrate the plate member 71, the position where the piezoelectric element 80 is fixed may be anywhere. Also, a plurality of piezoelectric elements 80 may be provided.

[0026] (Operation of the vibration device) The operation of the vibration device 8 will be described. When the control unit 10 drives the vibration device 8 in a state where the light source device 2 is emitting light and the light modulation element 3 is not forming a projected image, the vibration device 8 vibrates the plate member 71 in a direction orthogonal to the Z-axis direction. Thereby, the vibration device 8 removes the dust deposited on the plate member 71 of the louver 7.

[0027] (Function and effect) According to the projector 1 of this embodiment, the vibration device 8 vibrates the plate member 71 of the louver 7 in the X-axis direction. Thereby, even if there is only a small amount of dust adhering to the plate member 71, the dust can be removed.

[0028] The projector 1 includes a mounting portion 9 for mounting the louver 7 to the opening 55. The louver 7 is replaceable with respect to the opening 55. Thereby, when the louver 7 is extremely dirty or damaged, it can be replaced with a new louver 7.

[0029] The vibration device 8 is a piezoelectric element 80. Thereby, since the vibration frequency of the piezoelectric element 80 can be set to a frequency that cannot be heard by the human ear, the driving sound when the vibration device 8 is driven can be silenced. Also, it is easy to match the vibration frequency of the piezoelectric element 80 with the resonance frequency of the louver 7.

[0030] In the X-axis direction, cushioning materials 57 are disposed between the first holding portion 76 and the first fixing portion 91 of the mounting portion 9, and between the second holding portion 77 and the second fixing portion 92 of the mounting portion 9. Thereby, when the louver 7 is attached to the opening 55 by the mounting portion 9, rattling of the louver 7 in the X-axis direction can be suppressed. Further, even when the plate member 71 is vibrated in the X-axis direction, noise due to collision between the holding member 72 and the mounting portion 9 is unlikely to occur.

[0031] The vibration device 8 vibrates the plate member 71 in the X-axis direction and the Y-axis direction in a state where the light source device 2 is emitting light and the light modulation element 3 is not forming a projected image. Thereby, since the vibration device 8 is driven in a state where the projector 1 is not projecting the projected image as an enlarged image, it is possible to suppress the projected enlarged image from shaking due to vibration and becoming difficult to view.

[0032] The plate member 71 is subjected to a process that exhibits at least one of the functions of water repellency and oil repellency. Thereby, even when the projector 1 is used in an air environment containing oil or water, the oil or water adhering to the plate member 71 of the louver 7 can be removed by the vibration device 8.

[0033] (Embodiment 2) Next, the projector 1 of Embodiment 2 will be described. FIG. 5 is a view of the louver seen from inside the projector of Embodiment 2. FIG. 6 is a cross-sectional view taken along line B-B of FIG. 5. The configuration of the vibration device 8A of the projector 1 of Embodiment 2 is different from that of the projector 1 of Embodiment 1. Therefore, in Embodiment 2, the same components as those in Embodiment 1 may be denoted by the same reference numerals and the description may be omitted.

[0034] As shown in FIGS. 5 and 6, the vibration device 8A includes a shaft member 81 that contacts the plate member 71 and extends in the X-axis direction, and a drive unit 82 that vibrates the shaft member 81 in the X1 direction. The shaft member 81 is slidably supported in the X-axis direction by a support portion 58 provided on the housing 5. An elastic member 810 is provided on the outer peripheral surface of the shaft member 81. The elastic member 810 is made of hard rubber or the like. The elastic member 810 is in contact with the plate member 71 in an elastically deformed state. The drive unit 82 includes a drive source such as a DC motor, a stepping motor, a solenoid, a vibration motor, an ultrasonic motor, and a transmission mechanism that transmits the driving force to the shaft member 81. When the control unit drives the vibration device 8A, the shaft member 81 vibrates in the X-axis direction, so that the plate member 71 that contacts the elastic member 810 of the shaft member 81 vibrates in the X-axis direction and the Y-axis direction. Thereby, the vibration device 8A removes the dust deposited on the plate member 71 of the louver 7.

[0035] (Function and effect) The vibration device 8A includes a shaft member 81 that contacts the plate member 71 and extends in the X-axis direction, and a drive unit 82 that vibrates the shaft member 81 in the X-axis direction. Thereby, the vibration device 8A can vibrate the plate member 71 in the X-axis direction by vibrating the shaft member 81 in the X-axis direction.

[0036] (Embodiment 3) Next, the projector 1 of Embodiment 3 will be described. FIG. 7 is a view of the louver seen from the inside of the projector of Embodiment 3. FIG. 8 is a cross-sectional view taken along line C-C of FIG. 7. FIG. 9 is a perspective view for explaining the relationship between the vibration device 8B and the louver 7 in Embodiment 3. The configuration of the vibration device 8B of the projector 1 of Embodiment 3 is different from that of the projector 1 of Embodiment 1. Therefore, in Embodiment 3, the same components as those in Embodiment 1 may be denoted by the same reference numerals and the description thereof may be omitted.

[0037] As shown in FIGS. 7 to 9, the vibration device 8B includes a shaft member 83 extending in the X-axis direction, a convex portion 85 that protrudes radially from the shaft member 83 and contacts a plurality of plate members 71 when the shaft member 83 rotates, and a drive portion 84 that rotates the shaft member 83. The shaft member 83 is rotatably supported by a support portion 58 provided on the housing 5. The drive portion 84 includes a drive source such as a DC motor, a stepping motor, a solenoid, a vibration motor, or an ultrasonic motor, and a transmission mechanism that transmits the driving force to the shaft member 83. When the control portion drives the vibration device 8B, the shaft member 83 rotates, so that the convex portion 85 periodically bounces the plate member 71, and thus the plate member 71 vibrates in the X-axis direction and the Y-axis direction. Thereby, the vibration device 8B removes the dust deposited on the plate member 71 of the louver 7. When the drive portion 84 does not rotate the shaft member 83, as shown in FIG. 8, the convex portion 85 is in contact with the plate member 71.

[0038] (Function and Effect) The vibration device 8B includes a shaft member 83 extending in the X-axis direction, a convex portion 85 that protrudes radially from the shaft member 83 and contacts a plurality of plate members 71 when the shaft member 83 rotates, and a drive portion 84 that rotates the shaft member 83. Thereby, the vibration device 8B can vibrate the plate member 71 in the X-axis direction and the Y-axis direction by rotating the shaft member 83.

[0039] When the drive portion 84 does not rotate the shaft member 83, the convex portion 85 is in contact with the plate member 71. Thereby, even when an external force is applied to the plate member 71, since the plate member 71 and the convex portion 85 are in contact with each other, the plate member 71 is less likely to be damaged by the external force.

[0040] (Embodiment 4) Next, the projector 1 of Embodiment 4 will be described. FIG. 10 is a view of the louver seen from inside the projector of Embodiment 4. FIG. 11 is a cross-sectional view taken along the line D-D of FIG. 10. The projector 1 of Embodiment 4 differs from the projector 1 of Embodiment 1 in the configurations of the vibration device 8C and the mounting portion 9A. Therefore, in Embodiment 4, the same components as those in Embodiment 1 may be denoted by the same reference numerals and the description thereof may be omitted.

[0041] As shown in FIGS. 11 and 12, the mounting portion 9A includes a first support portion 95 that supports the first holding portion 76 and a second support portion 96 that supports the second holding portion 77. The first support portion 95 forms a guide groove 950 that supports the first holding portion 76 so as to be movable in the X-axis direction. The second support portion 96 forms a guide groove 960 that supports the second holding portion 77 so as to be movable in the X-axis direction. Therefore, the louver 7 is attached to the opening 55 so as to be movable in the X-axis direction by the first support portion 95 and the second support portion 96.

[0042] The vibration device 8C includes a first vibration portion 86 that vibrates the first holding portion 76 in the X-axis direction and a second vibration portion 87 that vibrates the second holding portion 77 in the X-axis direction. The first vibration portion 86 includes a spring 861 disposed at one end of the first holding portion 76 and a drive portion 862 disposed at the other end of the first holding portion 76. One end of the spring 861 is fixed to the side wall portion 51, and the other end of the spring 861 is fixed to one end of the first holding portion 76. The drive portion 862 moves the other end of the first holding portion 76 in the X1 direction or the X2 direction and then allows the other end of the first holding portion 76 to move freely in the X-axis direction. The drive portion 862 is, for example, a mechanism that moves the other end of the first holding portion 76 by a solenoid or magnetic force.

[0043] The second vibration unit 87 includes a spring 871 disposed at one end of the second holding unit 77 and a driving unit 872 disposed at the other end of the second holding unit 77. One end of the spring 871 is fixed to the side wall portion 51, and the other end of the spring 871 is fixed to one end of the second holding unit 77. The driving unit 872 moves the other end of the second holding unit 77 in the X1 direction or the X2 direction and then enables the other end of the second holding unit 77 to move freely in the X-axis direction. The driving unit 872 is, for example, a mechanism that moves the other end of the second holding unit 77 by a solenoid or magnetic force.

[0044] The control unit 10 first drives the first vibration unit 86. At this time, the driving unit 872 holds the other end of the second holding unit 77 so that it does not move. The driving unit 862 moves the other end of the first holding unit 76 in the X1 direction or the X2 direction to elastically deform the spring 861 and then releases the other end of the first holding unit 76. Thereby, the first vibration unit 86 vibrates the first holding unit 76 in the X-axis direction by the restoring force of the spring 861 to remove the dust deposited on the plate member 71 of the louver 7.

[0045] After the first vibration unit 86 vibrates the first holding unit 76 in the X-axis direction, the control unit 10 drives the second vibration unit 87. At this time, the driving unit 862 holds the other end of the first holding unit 76 so that it does not move. The driving unit 872 moves the other end of the second holding unit 77 in the X1 direction or the X2 direction to elastically deform the spring 871 and then releases the other end of the second holding unit 77. Thereby, the second vibration unit 87 vibrates the second holding unit 77 in the X-axis direction by the restoring force of the spring 871 to remove the dust deposited on the plate member 71 of the louver 7.

[0046] (Function and effect) The holding member 72 includes a first holding portion 76 that holds the end portion of the plate member 71 in the Z1 direction, and a second holding portion 77 that holds the end portion of the plate member 71 in the Z2 direction. The vibration device 8C includes a first vibration portion 86 that vibrates the first holding portion 76 in the X-axis direction, and a second vibration portion 87 that vibrates the second holding portion 77 in the X-axis direction. The second vibration portion 87 vibrates the second holding portion 77 in the X-axis direction after the first vibration portion 86 vibrates the first holding portion 76 in the X-axis direction. Thereby, the vibration device 8C can vibrate the end portion of the plate member in the Z1 direction and the end portion of the plate member 71 in the Z2 direction, respectively.

[0047] (Embodiment 5) Next, the projector 1 of Embodiment 5 will be described. FIG. 12 is a view of the louver seen from the inside of the projector of Embodiment 5. FIG. 13 is a cross-sectional view taken along the line E-E of FIG. 12. The projector 1 of Embodiment 5 does not include the mounting portion 9, and the configuration of the louver 7 is different from that of the projector 1 of Embodiment 1. Therefore, in Embodiment 5, the same components as those in Embodiment 1 may be denoted by the same reference numerals and the description may be omitted.

[0048] As shown in FIGS. 12 and 13, the louver 7 includes a plurality of plate members 71 extending in the Z-axis direction (first direction), and a holding member 72 that holds both end portions of the plate members 71 arranged in a plurality in the X-axis direction (second direction). The plurality of plate members 71 are arranged at equal intervals in the X-axis direction. The plate member 71 is subjected to a process that exhibits at least one of the functions of water repellency and oil repellency. In this embodiment, a fluorine-containing treatment agent that exhibits both the functions of water repellency and oil repellency is applied to the plate member 71. The holding member 72 is a part of the housing 5 and is an opening edge portion 56 that forms the opening 55. The plate member 71 is formed integrally with the opening edge portion 56. Thereby, since the louver 7 can be made a part of the housing 5, the manufacturing cost of the projector 1 can be suppressed.

[0049] (Other Embodiments) In the projector 1 of another embodiment, the control unit 10 may drive the vibration device 8 in a state where the fan 6 is stopped. That is, the vibration device 8 vibrates the plate member 71 in the X-axis direction and the Y-axis direction in a state where the fan 6 is stopped. Thereby, when the vibration device 8 removes the dust adhering to the plate member 71 of the louver 7, the removed dust is not taken into the inside of the housing 5 by the fan 6, so that it is possible to suppress the removed dust from accumulating inside the housing 5 or on the filter 65.

[0050] (Modification example) In the projector of Embodiment 1, the vibration device 8 was the piezoelectric element 80, but the vibration device 8 is not limited to the piezoelectric element 80. The vibration device 8 may be configured to be able to vibrate the plate member 71 of the louver 7, such as a vibration motor.

[0051] In the projectors of Embodiment 2 and Embodiment 3, the holding member 72 may be an opening edge portion 56 that is a part of the housing 5 and forms the opening portion 55. Thereby, since the louver 7 can be made a part of the housing 5, the manufacturing cost of the projector 1 can be suppressed.

[0052] The projector of Embodiment 4 may not include the second vibration unit 87. Thereby, the structure of the projector can be simplified.

[0053] The projectors of Practical Forms 1 to 3 may not include the cushioning material 57. Further, in the projectors of Embodiments 1 to 3, the first fixing portion 91 and the second fixing portion 92 were members that form recesses into which the first holding portion 76 and the second holding portion 77 fit, but the first fixing portion 91 and the second fixing portion 92 may be screws or the like that fix the first holding portion 76 and the second holding portion 77 to the inner peripheral surface of the housing 5.

[0054] In the projector of Embodiment 2, the elastic member 810 was provided on the outer peripheral surface of the shaft member 81, but the elastic member 810 may not be provided. Further, unevenness that contacts the plate member 71 may be provided on the outer peripheral surface of the shaft member 81.

[0055] In the projectors of the actual situation forms 1 to 3, the plate member 71 was subjected to processing that exhibits at least one of the functions of water repellency and oil repellency, but the plate member 71 may not be subjected to these processes.

[0056] [Summary of the present disclosure] Hereinafter, a summary of the present disclosure will be appended.

[0057] (Appendix 1) A light source device having a light source that emits light, A light modulation element that modulates the light emitted from the light source device to form a projection image, A projection lens that projects the projection image as an enlarged image, A housing that houses the light source device and the light modulation element, A fan that sucks gas from an opening provided in the housing to cool the inside of the housing, A louver provided in the opening, the louver including a plurality of plate members extending in a first direction and a holding member that holds both ends of the plurality of plate members arranged in a second direction orthogonal to the first direction, A vibration device that vibrates the plate member in a direction orthogonal to the first direction, A projector, characterized by comprising the above.

[0058] Accordingly, since the vibration device can vibrate the plate member of the louver in a direction orthogonal to the first direction, even if there is a small amount of dust adhering to the plate member, the dust can be removed.

[0059] (Appendix 2) The holding member is a part of the housing and is an opening edge portion that forms the opening, The projector according to Appendix 1, characterized in that the plate member is formed integrally with the opening edge portion.

[0060] Accordingly, since the louver can be made a part of the housing, the manufacturing cost of the projector can be suppressed.

[0061] (Supplementary Note 3) Further comprising an attachment portion for attaching the louver to the opening portion, The projector according to Supplementary Note 1, wherein the louver is replaceable with respect to the opening portion.

[0062] Accordingly, when the louver is extremely dirty or damaged, it can be replaced with a new louver.

[0063] (Supplementary Note 4) The projector according to Supplementary Note 2 or 3, wherein the vibration device is a piezoelectric element.

[0064] Accordingly, since the vibration frequency of the piezoelectric element can be set to a frequency that cannot be heard by the human ear, the driving sound when the vibration device is driven can be silenced. Also, it is easy to match the vibration frequency of the piezoelectric element with the resonance frequency of the louver.

[0065] (Supplementary Note 5) The projector according to Supplementary Note 2 or 3, comprising a shaft member that contacts the plate member and extends in the second direction, and a driving unit that vibrates the shaft member in the second direction.

[0066] Accordingly, the vibration device can vibrate the plate member in the second direction by vibrating the shaft member in the second direction, in the X-axis direction.

[0067] (Supplementary Note 6) The projector according to Supplementary Note 2 or 3, comprising a shaft member that extends in the second direction, a convex portion that protrudes radially from the shaft member and contacts the plurality of plate members when the shaft member rotates, and a driving unit that rotates the shaft member.

[0068] As a result, the vibration device can vibrate the plate member in a direction orthogonal to the first direction by rotating the shaft member.

[0069] (Appendix 7) The projector according to Appendix 6, wherein the convex portion is in contact with the plate member when the driving portion is not rotating the shaft member.

[0070] As a result, even when an external force is applied to the plate member, the plate member and the convex portion are in contact with each other, so that the plate member is less likely to be damaged by the external force.

[0071] (Appendix 8) The holding member includes a first holding portion that holds one end of the plurality of plate members and a second holding portion that holds the other end of the plurality of plate members. The projector according to Appendix 3, wherein the vibration device includes a first vibration portion that vibrates the first holding portion in the second direction.

[0072] As a result, the vibration device can remove dust attached to the plate member by vibrating one end of the plate member in the second direction. Therefore, compared with a configuration in which the first holding portion and the second holding portion are each vibrated, the configuration of the vibration device is simplified.

[0073] (Appendix 9) The vibration device includes a second vibration portion that vibrates the second holding portion in the second direction. The projector according to Appendix 8, wherein the second vibration portion vibrates the second holding portion in the second direction after the first vibration portion vibrates the first holding portion in the second direction.

[0074] As a result, the vibration device can vibrate one end of the plate member and the other end of the plate member 71, respectively, so that dust attached to the plate member can be more reliably removed.

[0075] (Appendix 10) The vibration device vibrates the plate member in a direction orthogonal to the first direction in a state where the light source device emits light and the light modulation element does not form the projected image, in the projector according to any one of Appendices 1 to 9.

[0076] Accordingly, since the vibration device is driven in a state where the projector does not project the projected image as an enlarged image, it is possible to suppress the projected enlarged image from shaking due to vibration and becoming difficult to view.

[0077] (Appendix 11) The vibration device vibrates the plate member in a direction orthogonal to the first direction in a state where the fan is stopped, in the projector according to any one of Appendices 1 to 9.

[0078] Accordingly, when the vibration device removes dust attached to the plate member of the louver, the removed dust is not taken into the inside of the housing by the fan, so it is possible to suppress the removed dust from accumulating inside the housing.

[0079] (Appendix 12) The plate member is subjected to a process that exhibits at least one of a water-repellent and an oil-repellent function, in the projector according to any one of Appendices 1 to 11.

[0080] Accordingly, even when the projector is used in an air environment containing oil or water, the oil or water attached to the plate member of the louver can be removed by the vibration device.

Explanation of Reference Numerals

[0081] 1... Projector, 2... Light source device, 3·3R·3G·3B... Light modulation element, 4... Projection lens, 5... Housing, 6... Fan, 7... Louver, 8·8A·8B·8C... Vibration device, 9·9A, 10... Control unit, 11... Power supply device, 20... Light source, 21... Illumination optical system, 22... First integrator lens, 23... Second integrator lens, 24... Polarization conversion element, 25... Superposition lens, 30... Separation optical system, 31... Dichroic mirror, 32... Reflective mirror, 33R·33G...·33B... Field lens, 34... Dichroic mirror, 35... Relay lens, 36... Reflective mirror, 37... Relay lens, 38... Reflective mirror, 40... Dichroic prism, 51... Side wall portion, 52... Top plate portion, 53... Bottom plate portion, 55... Opening, 56... Opening edge portion, 57... Cushion material, 58... Support portion, 65... Filter, 71... Plate member, 72... Holding member, 76... First holding portion, 77... Second holding portion, 80... Piezoelectric element, 81... Shaft member, 82... Driving portion, 83... Shaft member, 84... Driving portion, 85... Protrusion, 86... First vibration portion, 87... Second vibration portion, 91... First fixing portion, 92... Second fixing portion, 95... First support portion, 96... Second support portion, 810... Elastic member, 861... Spring, 862... Driving portion, 871... Spring, 872... Driving portion, 910... Concave portion, 920... Concave portion, 950... Guide groove, 960... Guide groove, N... Optical axis.

Claims

1. A light source device having a light source that emits light, a light modulation element that modulates the light emitted from the light source device to form a projected image, a projection lens that projects the projected image as an enlarged image, a housing that houses the light source device and the light modulation element, a fan that sucks gas through an opening provided in the housing to cool the inside of the housing, a louver provided at the opening, the louver including a plurality of plate members extending in a first direction and a holding member that holds both ends of the plurality of plate members arranged in a second direction orthogonal to the first direction, a vibration device that vibrates the plate members in a direction orthogonal to the first direction, A projector, characterized by comprising the above.

2. The holding member is a part of the housing and is an opening edge portion that forms the opening, The projector according to claim 1, wherein the plate member is integrally formed with the opening edge portion.

3. Further comprising an attachment portion for attaching the louver to the opening, The projector according to claim 1, wherein the louver is replaceable with respect to the opening.

4. The projector according to claim 2 or 3, wherein the vibration device is a piezoelectric element.

5. The projector according to claim 2 or 3, wherein the vibration device includes a shaft member that contacts the plate member and extends in the second direction, and a drive unit that vibrates the shaft member in the second direction.

6. The projector according to claim 2 or 3, wherein the vibration device includes a shaft member extending in the second direction, a convex portion that protrudes radially from the shaft member and contacts the plurality of plate members when the shaft member rotates, and a drive unit that rotates the shaft member.

7. The projector according to claim 6, wherein the convex portion is in contact with the plate member when the drive unit does not rotate the shaft member.

8. The holding member includes a first holding portion that holds one end of the plurality of plate members and a second holding portion that holds the other end of the plurality of plate members, The projector according to claim 3, wherein the vibration device includes a first vibration portion that vibrates the first holding portion in the second direction.

9. The vibration device includes a second vibration unit that vibrates the second holding unit in the second direction. The projector according to claim 8, wherein the second vibration unit vibrates the second holding unit in the second direction after the first vibration unit vibrates the first holding unit in the second direction.

10. The projector according to claim 1, wherein the vibration device vibrates the plate member in a direction orthogonal to the first direction in a state where the light source device is emitting light and the light modulation element is not forming the projected image.

11. The projector according to claim 1, wherein the vibration device vibrates the plate member in a direction orthogonal to the first direction in a state where the fan is stopped.

12. The projector according to claim 1, wherein the plate member is subjected to a process that exhibits at least one of a water repellent function and an oil repellent function.

Images