Light source device and image projection device

Abstract

To provide a light source device that is usable even in a period in which a fan mechanism is removed from the light source device.SOLUTION: A light source device according to an aspect of the present invention has: a light emitting unit that emits light according to supplied power; a support member that supports the light emitting unit; a fan mechanism that is removably provided to the support member and sends air to an object to be cooled; a detection unit that detects the attachment and detachment of the fan mechanism to and from the support member; and a control unit that controls the amount of power supplied to the light emitting unit according to a result of detection performed by the detection unit.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a light source device and an image projection device. [Background technology]

[0002] 2. Description of the Related Art A light source device has been known that includes a fan mechanism that is detachably attached to a support member that supports a light-emitting unit and that blows air onto an object to be cooled. This light source device is used in optical devices such as projectors.

[0003] In the above-mentioned light source device, in order to simplify the wiring process of the cable connecting the cooling fan and the control unit, a configuration has been disclosed in which a relay unit is provided to electrically relay the fan mechanism placed in the sealed space and the control unit placed outside the sealed space, and the fan mechanism placed in the sealed space can be removed by disassembling the light source device so that the connecting member provided on the inner surface of the relay unit is exposed (see, for example, Patent Document 1). Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the configuration of Patent Document 1, the light source device cannot be used while the fan mechanism is detached from the light source device.

[0005] SUMMARY OF THE INVENTION An object of the present invention is to provide a light source device that can be used even when the fan mechanism is detached from the light source device. [Means for solving the problem]

[0006] A light source device according to one aspect of the present invention includes a light emitting unit that emits light in response to supplied power, a support member that supports the light emitting unit, a fan mechanism that is detachably attached to the support member and sends air to a cooling object, a detection unit that detects attachment and detachment of the fan mechanism to the support member, and a control unit that controls the amount of power supplied to the light emitting unit in response to a detection result by the detection unit. a cooling member that cools the light emitting unit; With The control unit supplies a predetermined amount of power to the light-emitting unit when the fan mechanism is attached to the support member, and supplies an amount of power less than the predetermined amount to the light-emitting unit when the fan mechanism is detached from the support member, the predetermined amount being an amount of power that does not cause a malfunction or damage to the light-emitting unit and that is determined according to the cooling capacity of the cooling member. . [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a light source device that can be used even when the fan mechanism is detached from the light source device. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram illustrating an example of the overall configuration of a light source device according to a first embodiment. [Figure 2] 1 is a block diagram illustrating the configuration of a light source device according to a first embodiment. [Figure 3] 2 is a front view illustrating the light source device of FIG. 1 with the fan mechanism removed. [Figure 4] 3 is a front view illustrating the configuration of a fan holding member according to the first embodiment. FIG. [Figure 5] 3 is a block diagram illustrating the functional configuration of a control unit according to the first embodiment. FIG. [Figure 6] 5 is a flowchart of an example of processing by a control unit of the light source device according to the first embodiment. [Figure 7] FIG. 2 is an enlarged cross-sectional view of the vicinity of the control-side connector according to the first embodiment. [Figure 8] 5A and 5B are diagrams illustrating an example of an intake and exhaust port of the fan holding member according to the first embodiment. [Figure 9] 10A and 10B are diagrams illustrating an example of a sealed state of an image projection device according to a fourth embodiment. [Figure 10] FIG. 10 is a front view illustrating the configuration of a light source device according to a second embodiment. [Figure 11] FIG. 10 is a block diagram illustrating the configuration of a light source device according to a second embodiment. [Figure 12] 10 is a front view illustrating the configuration of a fan holding member according to a second embodiment. FIG. [Figure 13] FIG. 10 is a front view illustrating the configuration of a light source device according to a third embodiment. [Figure 14] 14 is a diagram showing an example of the fan holding member of the light source device in FIG. 13 being opened. [Figure 15]FIG. 10 is a diagram illustrating the configuration of an image projection device according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] A light source device and an image projection device according to an embodiment of the present invention will be described in detail with reference to the drawings. However, the following embodiments are merely illustrative of light source devices and image projection devices for embodying the technical concepts of the present embodiments, and are not limited thereto. Furthermore, unless otherwise specified, the dimensions, materials, shapes, relative arrangements, etc. of components described in the embodiments are merely illustrative examples and are not intended to limit the scope of the present invention. Note that the size, positional relationships, etc. of components shown in each drawing may be exaggerated for clarity. Furthermore, in the following description, the same names and symbols indicate the same or similar components, and detailed descriptions will be omitted as appropriate.

[0010] In the drawings shown below, directions may be indicated by the X-axis, Y-axis, and Z-axis, but the Z direction along the Z-axis indicates the direction in which the light source device and the image projection device according to the embodiment emit light, the X direction along the X-axis indicates the direction intersecting with the Z direction, and the Y direction along the Y-axis indicates the direction intersecting with both the X direction and the Z direction.

[0011] The direction in which the arrow points in the X direction is referred to as the +X direction, and the direction opposite to the +X direction is referred to as the -X direction. The direction in which the arrow points in the Y direction is referred to as the +Y direction, and the direction opposite to the +Y direction is referred to as the -Y direction. Furthermore, the direction in which the arrow points in the Z direction is referred to as the +Z direction, and the direction opposite to the +Z direction is referred to as the -Z direction. However, these do not limit the orientation of the light source device and image projection device when in use, and the orientation of the light source device and image projection device is arbitrary.

[0012] [First embodiment] <Configuration example of light source device 100> The overall configuration of a light source device 100 according to the first embodiment will be described with reference to Fig. 1 to Fig. 4. Fig. 1 and Fig. 2 are diagrams showing an example of the overall configuration of the light source device 100, with Fig. 1 being a front view and Fig. 2 being a block diagram. Fig. 3 is a front view illustrating the light source device 100 with the fan mechanism removed. Fig. 4 is a front view illustrating the configuration of a fan holding member.

[0013] As shown in FIGS. 1 and 2, the light source device 100 includes a light emitting unit 1, a support member 2, a heat pipe 3, a fan mechanism 4, a fan holding member 5, a detection unit 6, and a control unit .

[0014] The light source device 100 is attached to an image projection device such as a projector and is used for purposes such as generating image light to be projected from the image projection device. However, the use of the light source device 100 is not limited to image projection devices, and the light source device 100 can be applied to various optical devices that use light. In particular, the light source device 100 is suitable for optical devices that require strong irradiation light and whose light-emitting unit 1 generates a lot of heat.

[0015] The light-emitting unit 1 emits light in response to the power supplied thereto. The light-emitting unit 1 may be an LED (Light Emitting Diode), an LD (Laser Diode), a halogen lamp, a xenon lamp, a metal halide lamp, or the like. The light-emitting unit 1 emits light and generates heat in response to the power supplied thereto. The light-emitting unit 1 may include multiple light-emitting units that emit light of different colors.

[0016] The support member 2 is a member that supports the light-emitting unit 1. The support member 2 is made of a material such as a metal material or a resin material. In this embodiment, the support member 2 contains a metal material with high thermal conductivity such as aluminum, is configured to have a large area in contact with the surrounding air, and is a heat sink that supports the light-emitting unit 1 while dissipating and exhausting heat generated by the light-emitting unit 1 to cool the light-emitting unit. The support member 2 also functions as a cooling member that cools the light-emitting unit. However, the support member 2 does not necessarily have to be a heat sink as long as it can support the light-emitting unit 1.

[0017] The heat pipe 3 is an example of a cooling member that cools the light-emitting unit 1. The heat pipe 3 is a heat transport member that uses latent heat of evaporation and condensation, and cools the light-emitting unit 1 by transporting the heat generated by the light-emitting unit 1. In this embodiment, the heat generated by the light-emitting unit 1 is transferred to the support member 2 through the heat pipe 3, and is radiated and exhausted from the support member 2. The light source device 100 does not necessarily have to have a cooling member such as the heat pipe 3, but it is preferable that the light source device 100 have a cooling member in order to increase the cooling efficiency of the light-emitting unit 1.

[0018] The fan mechanism 4 is detachably attached to the support member 2 and blows air to the object to be cooled. The fan mechanism 4 has one or more blade members, and blows air by rotating the blade members to impart flow energy to the air. Various types of fans can be used for the fan mechanism 4, such as an axial fan, a multi-blade fan, or a cross-flow fan.

[0019] In this embodiment, the fan mechanism 4 includes a first fan mechanism 41 and a second fan mechanism 42. The first fan mechanism 41 and the second fan mechanism 42 are provided in different positions and blow air toward the object to be cooled from different positions. However, the fan mechanism 4 is not limited to a configuration including two fan mechanisms, and may include one fan mechanism, or three or more fan mechanisms. In this embodiment, the object to be cooled is the light-emitting unit 1, the support member 2, the heat pipe 3, etc. The fan mechanism 4 blows air toward these objects to cool them.

[0020] The fan holding member 5 holds the fan mechanism 4 and is a member that can be attached to and detached from the support member 2 together with the fan mechanism 4. As shown in FIG. 4, the fan holding member 5 has a tubular structure, and the air blown by the fan mechanism 4 flows inside the tubular structure. The tubular structure can also be called a duct structure. In FIG. 4, the air blown by the fan mechanism 4 can flow along the Z direction. Because the fan holding member 5 has a tubular structure, it can force convection of air along the Z direction in which the tube extends.

[0021] 3 and 4, the fan mechanism 4 is attached to and detached from the support member 2 by attaching and detaching the fan holding member 5 to and from the support member 2. The fan mechanism 4 is supplied with power via a control-side connector 70 included in the control unit 7 and a fan-side connector 50 provided on the fan holding member 5. The fan-side connector 50 is provided on the fan holding member 5 via a support member or the like.

[0022] Light source device 100 can easily attach and detach fan mechanisms 4 by integrating multiple mechanisms and members, such as multiple fan mechanisms 4 and fan-side connectors 50, into support member 2. However, light source device 100 does not necessarily have to have fan holding member 5, and fan mechanisms 4 may be directly attached and detached to support member 2. Alternatively, fan mechanisms 4 may be indirectly attached and detached to support member 2 via a housing or the like.

[0023] The detection unit 6 detects attachment / detachment of the fan mechanism 4 to / from the support member 2. As shown in FIGS. 1, 3, and 4, in this embodiment, the detection unit 6 is a push button provided on the support member 2. However, the detection unit 6 does not necessarily have to be provided on the support member 2, as long as it is provided on the support member 2 side and not on the fan holding member 5 side. The detection unit 6 may be provided on the light-emitting unit 1, or, if the light source device 100 has a housing that houses the light-emitting unit 1, the support member 2, etc., the detection unit 6 may be provided on this housing, etc.

[0024] On the other hand, the fan holding member 5 is provided with a boss 61 which is a columnar member with its longitudinal direction in the Y-axis direction.

[0025] When the fan mechanism 4 is attached to the support member 2, the detection unit 6 detects that the end of the boss 61 is pressing against the detection unit 6, and can detect the attachment of the fan mechanism 4. When the fan mechanism 4 is removed from the support member 2, the detection unit 6 detects that the end of the boss 61 is no longer pressing against the detection unit 6, and can detect the removal of the fan mechanism 4. The detection unit 6 outputs a detection signal to the control unit 7 that indicates the attachment / detachment state of the fan mechanism 4 or that is related to the attachment / detachment state.

[0026] However, the detection method used by the detection unit 6 is not limited to the above. For example, the detection unit 6 may be a sensor that detects electrical conduction instead of a push button, and may detect the installation of the fan mechanism 4 by detecting electrical conduction through contact with the boss 61 that includes a conductive member. Alternatively, the detection unit 6 may have an optical or capacitance proximity sensor, and may detect the installation of the fan mechanism 4 by detecting the proximity of the fan holding member 5.

[0027] The control unit 7 controls the amount of power supplied to the light-emitting unit 1 in accordance with the detection result by the detection unit 6. As shown in Fig. 3, the control unit 7 has a control-side connector 70. When the fan holding member 5 is attached to the support member 2, the fan-side connector 50 fits into the control-side connector 70, thereby electrically connecting the control unit 7 and the fan mechanism 4.

[0028] The control unit 7 is configured to include a CPU (Central Processing Unit), electrical circuits, memory, etc., which are mounted on an electrical mounting board. The electrical mounting board having the control unit 7 may be disposed in any position in the light source device 100, as long as the control-side connector 70 and the fan-side connector 50 can be fitted together when the fan holding member 5 is attached to the support member 2.

[0029] <Example of functional configuration of control unit 7> 5 is a block diagram illustrating an example of the functional configuration of the control unit 7. The control unit 7 has an attachment / detachment information acquisition unit 71, a selection reception unit 72, and a supply power control unit 73. The control unit 7 realizes these functions by having a CPU execute a predetermined program stored in memory, or by using an electric circuit.

[0030] The attachment / detachment information acquisition unit 71 receives the detection signal from the detection unit 6 and acquires attachment / detachment information indicating whether the fan mechanism 4 is attached to or detached from the support member 2.

[0031] The selection receiving unit 72 receives a user's selection regarding the amount of power to be supplied to the light-emitting unit 1. For example, the selection receiving unit 72 can receive a user's selection regarding the amount of power to be supplied to the light-emitting unit 1 via an operation unit included in the light source device 100. By selecting the amount of power to be supplied to the light-emitting unit 1, the user can select the brightness of the light emitted by the light-emitting unit 1.

[0032] The power supply control unit 73 controls the amount of power supplied to the light-emitting unit 1. For example, the power supply control unit 73 controls the amount of power supplied to the light-emitting unit by modulating the power supplied from the commercial power supply 200 using a PWM (Pulse Width Modulation) control method or the like. However, the power supply source is not limited to the commercial power supply 200, and the power supply control unit 73 may control the amount of power supplied to the light-emitting unit 1 by controlling the power supplied from another power supply device.

[0033] Particularly in this embodiment, the supply power control unit 73 controls the amount of power supplied to the light-emitting unit 1 in accordance with the detection result by the detection unit 6. More specifically, the supply power control unit 73 determines whether or not the fan mechanism 4 is attached to the support member 2, based on the attachment / detachment information acquired by the attachment / detachment information acquisition unit 71 in response to the detection signal from the detection unit 6. If the fan mechanism 4 is attached to the support member 2, the supply power control unit 73 supplies a predetermined amount of power to the light-emitting unit 1, and if the fan mechanism 4 has been detached from the support member 2, the supply power control unit 73 supplies an amount of power less than the predetermined amount to the light-emitting unit 1.

[0034] Here, if the fan mechanism 4 is detached from the support member 2, the fan mechanism 4 cannot blow air, which reduces the efficiency of suppressing heat generation from the light-emitting unit 1, and as a result, the light-emitting unit 1 may malfunction or be damaged by the heat. Furthermore, if the light emission by the light-emitting unit 1 is stopped to prevent malfunction or damage to the light-emitting unit 1, the user will not be able to use the light source device 100 while the fan mechanism 4 is detached from the support member 2.

[0035] In this embodiment, while the fan mechanism 4 is detached from the support member 2, the light source device 100 supplies to the light-emitting unit 1 an amount of power that is less than the above-mentioned predetermined amount. As a result, the light source device 100 reduces the brightness of the light emitted by the light-emitting unit 1 compared to when the fan mechanism 4 is attached to the support member 2, and suppresses heat generation by the light-emitting unit 1. As a result, the light source device 100 can be used while the fan mechanism 4 is detached from the support member 2, preventing malfunction or damage to the light-emitting unit 1. While the fan mechanism 4 is detached from the support member 2, heat generation by the light-emitting unit 1 is suppressed by the cooling action of the heat pipe 3 and the support member 2.

[0036] The amount of power to be supplied that will not cause a malfunction or damage to the light-emitting unit 1 is determined in advance according to the cooling capacity of the heat pipes 3 and the support member 2. During the period when the fan mechanism 4 is detached from the support member 2, the power supply control unit 73 supplies this predetermined amount of power to the light-emitting unit 1, thereby suppressing heat generation by the light-emitting unit 1. Note that if the light source device 100 does not have a cooling member such as a heat pipe 3, the amount of power to be supplied that will not cause a malfunction or damage to the light-emitting unit 1 is determined in advance according to the natural cooling capacity.

[0037] When the installation of the fan mechanism 4 is detected by the detection unit 6, the light source device 100 may receive a user's selection for the amount of power to be supplied to the light-emitting unit 1 by the selection receiving unit 72, and supply the selected amount of power by the supply power control unit 73.

[0038] <Example of processing by the control unit 7> 6 is a flowchart showing an example of processing by the control unit 7. The control unit 7 starts the operation of FIG. 6 when, for example, power supply from the commercial power source 200 to the light source device 100 is started.

[0039] First, in step S61, the control unit 7 receives a detection signal from the detection unit 6 via the attachment / detachment information acquisition unit 71 and acquires attachment / detachment information indicating whether the fan mechanism 4 is attached to or detached from the support member 2.

[0040] Subsequently, in step S62 , the control unit 7 determines, via the power supply control unit 73 , based on the attachment / detachment information acquired by the attachment / detachment information acquisition unit 71 , whether the fan mechanism 4 is attached to the support member 2 .

[0041] If it is determined in step S62 that the fan mechanism 4 is attached (Yes in step S62), in step S63 the control unit 7 causes the power supply control unit 73 to supply to the light-emitting unit 1 a predetermined amount of power that is supplied when the fan mechanism 4 is attached to the support member 2. Thereafter, the control unit 7 proceeds to step S66.

[0042] On the other hand, if it is determined in step S62 that the light-emitting unit 1 is not attached (step S62, No), in step S64, the control unit 7 receives, via the selection receiving unit 72, a user selection for the amount of power to be supplied to the light-emitting unit 1. The selected amount of power is less than the predetermined amount.

[0043] Next, in step S65, the control unit 7 causes the supply power control unit 73 to supply the amount of power received by the selection receiving unit 72 to the light-emitting unit 1. However, the supply power control unit 73 may supply to the light-emitting unit 1 an amount of power that is predetermined according to the cooling capacity of the light source device 100 when the fan mechanism 4 is detached from the support member 2, but is less than the above-mentioned predetermined amount.

[0044] Next, in step S66, the control unit 7 determines whether or not to terminate the process. For example, the control unit 7 determines to terminate the process when the power supply from the commercial power source 200 to the light source device 100 is stopped or when an end instruction is received from the user via an operation unit of the light source device 100.

[0045] In step S66, if it is determined that the process is to be terminated (step S66, Yes), the control unit 7 terminates the process, and if it is determined that the process is not to be terminated (step S66, No), the control unit 7 performs the process from step S61 onwards again.

[0046] In this way, the control unit 7 can supply power to the light-emitting unit 1 to make the light-emitting unit 1 emit light.

[0047] <Detailed configuration example of each part of the light source device 100> 7 is an enlarged cross-sectional view of the control connector 70 and its vicinity in the control unit 7. As shown in FIG.

[0048] Terminal 702 is held by exterior member 701 so that its end is positioned at a position recessed from outer surface 701a of exterior member 701. As shown in Fig. 7, exterior member 701 holds terminal 702 so that terminal 702 is inserted into a gap of width W along the Z direction. End 702a of terminal 702 on the -Y direction side is positioned at a position recessed by a depth D from outer surface 701a on the -Y direction side of exterior member 701.

[0049] Here, when the fan holding member 5 is removed from the support member 2, the terminal 702 of the control-side connector 70 of the control unit 7 is exposed, and a person who touches the exposed terminal 702 may receive an electric shock. In the light source device 100, the end 702a on the -Y direction side of the terminal 702 is positioned at a position recessed by a depth D from the outer surface 701a on the -Y direction side of the exterior member 701, thereby making it possible to prevent a person from receiving an electric shock when touching the terminal 702. To prevent a person from touching the terminal 702, the width W is preferably set to a width that prevents a person's fingers from entering.

[0050] 8 is a diagram illustrating an example of the air intake port 51 and the air exhaust port 52 of the fan holding member 5. As shown in Fig. 8, the fan holding member 5 has the air intake port 51 that draws air into the inside of the fan holding member 5, the air exhaust port 52 that exhausts air from the inside of the fan holding member 5, and a mesh member 53 provided in at least one of the air intake port 51 and the air exhaust port 52.

[0051] Air intake port 51 is provided to face first fan mechanism 41 along the airflow direction of first fan mechanism 41. Air exhaust port 52 is provided to face second fan mechanism 42 along the airflow direction of second fan mechanism 42. By having air intake port 51 and air exhaust port 52, fan holding member 5 can ventilate the air inside fan holding member 5.

[0052] Mesh member 53 is a plate-like member with a plurality of openings arranged in a mesh pattern. Mesh member 53 blocks intake port 51 and exhaust port 52 while allowing air to flow between the inside and outside of fan holding member 5.

[0053] A person may be injured if their fingers or the like come into contact with the first fan mechanism 41 and the second fan mechanism 42 through the intake port 51 and the exhaust port 52. The fan holding member 5 has the mesh member 53, which prevents a person from coming into contact with the first fan mechanism 41 and the second fan mechanism 42 through the intake port 51 and the exhaust port 52 and being injured.

[0054] 9 is a diagram illustrating an example of a sealed state of the light source device 100. In the example of FIG.

[0055] The housing 8 is a box-shaped member that houses at least the light-emitting unit 1 and the support member 2. The sealing member 81 is a member that prevents dust and the like from entering the inside of the housing 8. The sealing member 81 can be configured to include a resin tape member or the like.

[0056] 9, the exterior and cooling member 9 is, for example, a heat sink, and is provided so as to be in contact with the housing 8. By bringing the exterior and cooling member 9 into contact with the housing 8, it is possible to increase the cooling efficiency of the light emitting unit 1 and the support member 2. The projection lens 10 is a lens that projects light from the light emitting unit 1 provided inside the housing 8. However, the light source device 100 does not necessarily have to have the housing 8, the exterior and cooling member 9, and the projection lens 10.

[0057] <Effects of the Light Source Device 100> The effects of the light source device 100 will be described.

[0058] In order for users to use optical devices such as projectors equipped with light source devices for a long period of time, optical device service technicians may perform maintenance work such as repairing or replacing optical device components. In particular, in recent years, as light source devices have become mainstream with solid-state light sources such as LEDs, the lifespan of light source devices has significantly increased, resulting in longer maintenance intervals for optical devices. Furthermore, when optical devices are used for signage purposes or to display process information in factories, many users are concerned about downtime, which is the period during which the optical device cannot be used.

[0059] In light source devices used in optical devices, the fan mechanism of the light source device may become entangled with dust or particles, causing the fan mechanism to malfunction. Therefore, there is a demand for light source devices whose fan mechanism can be easily detached and replaced.

[0060] Patent Document 1 discloses a light source device configuration in which the fan mechanism can be easily attached and detached, but with the configuration described in Patent Document 1, the light source device cannot be used while the fan mechanism is detached from the light source device because heat generation from the light-emitting section of the light source device cannot be suppressed, resulting in long downtime for the light source device.

[0061] The light source device 100 of this embodiment includes a light-emitting unit 1 that emits light in response to the power supplied, a support member 2 that supports the light-emitting unit 1, a fan mechanism 4 that is detachably attached to the support member 2 and blows air to an object to be cooled, a detection unit 6 that detects the attachment and detachment of the fan mechanism 4 to the support member 2, and a control unit 7 that controls the amount of power supplied to the light-emitting unit 1 in response to the detection result by the detection unit 6.

[0062] By controlling the amount of power supplied to the light-emitting unit 1 in accordance with whether the fan mechanism 4 is attached to or detached from the support member 2, it is possible to make the amount of power supplied different between, for example, when the fan mechanism 4 is attached to the support member 2 and when the fan mechanism 4 is not attached to the support member 2. This makes it possible to control the light-emitting unit 1 so as to suppress heat generation, thereby preventing malfunction or damage to the light-emitting unit 1. As a result, in this embodiment, it is possible to provide a light source device 100 that can be used even while the fan mechanism 4 is detached from the light source device 100.

[0063] Furthermore, in this embodiment, when the fan mechanism 4 is attached to the support member 2, the control unit 7 supplies a predetermined amount of power to the light-emitting unit 1, and when the fan mechanism 4 is detached from the support member 2, the control unit 7 supplies an amount of power less than the predetermined amount to the light-emitting unit 1. As a result, the light source device 100 can dim the brightness of the light emitted by the light-emitting unit 1 compared to when the fan mechanism 4 is attached to the support member 2, suppress heat generation by the light-emitting unit 1, and prevent malfunction or damage to the light-emitting unit 1. As a result, in this embodiment, it is possible to provide a light source device 100 that can be used even when the fan mechanism 4 is detached from the light source device 100.

[0064] Furthermore, in this embodiment, the light source device 100 has a heat pipe 3 (cooling member) that cools the light-emitting unit 1, and a support member 2 (cooling member) that functions as a heat sink. By having the cooling member, the light source device 100 increases the cooling efficiency of the light-emitting unit 1 even when the fan mechanism 4 is detached, making the light source device 100 usable. Furthermore, the light source device 100 can alleviate restrictions on the brightness of the light emitted by the light-emitting unit 1 compared to a case where the cooling member is not provided. Furthermore, the light source device 100 increases the cooling efficiency of the light-emitting unit 1 by using the cooling member even when the fan mechanism 4 is attached, making it possible to prevent malfunction or damage to the light-emitting unit 1.

[0065] This embodiment also includes a selection receiving unit 72 that receives a user's selection regarding the amount of power to be supplied to the light-emitting unit 1. This allows the user to select the brightness of the light emitted by the light-emitting unit 1 while the fan mechanism 4 is detached.

[0066] Furthermore, in this embodiment, the light source device 100 has a housing 8 that houses at least the light-emitting unit 1 and the support member 2, and a sealing member 81 that seals the inside of the housing 8. This prevents dust and the like from entering the inside of the housing 8, and can suppress malfunctions or performance degradation caused by dust and the like adhering to the light-emitting unit 1, the support member 2, etc.

[0067] Furthermore, in this embodiment, the light source device 100 includes a fan holding member 5 that holds the fan mechanism 4 and is detachable from the support member 2 together with the fan mechanism 4. The fan mechanism 4 is attached to and detached from the support member 2 by attaching and detaching the fan holding member 5 to and from the support member 2, and is supplied with power via a control-side connector 70 included in the control unit 7 and a fan-side connector 50 provided on the fan holding member 5. At least one of the control-side connector 70 and the fan-side connector 50 has an exterior member 701 and a terminal 702 held by the exterior member 701, and the terminal 702 is held by the exterior member 701 so that its end 702a is positioned in a position recessed from the outer surface 701a of the exterior member 701. This configuration prevents electric shock when a person touches the terminal 702 when the fan holding member 5 is detached from the support member 2.

[0068] In this embodiment, fan holding member 5 has air intake port 51 that draws air into the interior of fan holding member 5, air exhaust port 52 that exhausts air from the interior of fan holding member 5, and mesh members 53 that are provided at both air intake port 51 and air exhaust port 52. By including mesh member 53, fan holding member 5 can prevent a person from coming into contact with first fan mechanism 41 and second fan mechanism 42 through air intake port 51 and air exhaust port 52 and being injured.

[0069] In this embodiment, the fan holding member 5 has a tubular structure, and the air blown by the fan mechanism 4 flows inside the tubular structure. The tubular structure of the fan holding member 5 allows forced convection of air along the tube, improving the cooling efficiency of the object to be cooled. The fan holding member 5 has at least one of an air intake port 51 and an exhaust port 52, and may have a mesh member 53 provided in at least one of the air intake port 51 and the exhaust port 52.

[0070] Furthermore, in this embodiment, the detection unit 6 is provided on the support member 2 side. This prevents protrusions such as bosses from protruding from the support member 2 when the fan holding member 5 is removed from the support member 2, making it easier to handle the light source device 100 from which the fan holding member 5 has been removed.

[0071] [Second embodiment] A light source device 100a according to the second embodiment will be described with reference to Figures 10 to 12. Note that the same components as those described in the first embodiment are denoted by the same reference numerals, and duplicated descriptions will be omitted where appropriate. This also applies to the following embodiments.

[0072] 10 and 11 are diagrams showing an example of the overall configuration of the light source device 100, with Fig. 10 being a front view and Fig. 11 being a block diagram. Fig. 12 is a front view illustrating the configuration of the fan holding member 5a.

[0073] 10 to 12, the light source device 100a has a fan holding member 5a. The detection unit 6 is provided on the fan holding member 5a. However, the detection unit 6 does not necessarily have to be provided on the fan holding member 5a as long as it is provided on the fan holding member 5a side rather than on the support member 2 side. The boss 61 is provided on the support member 2.

[0074] When the fan mechanism 4 is attached to the support member 2, the detection unit 6 detects that the end of the boss 61 provided on the support member 2 presses against the detection unit 6 provided on the fan holding member 5a, thereby detecting the attachment of the fan mechanism 4. When the fan mechanism 4 is detached from the support member 2, the detection unit 6 detects that the end of the boss 61 no longer presses against the detection unit 6 provided on the fan holding member 5a, thereby detecting the removal of the fan mechanism 4. The detection unit 6 outputs a detection signal indicating the attachment / detachment state of the fan mechanism 4 or related to the attachment / detachment state to the control unit 7. Other functions and operations of the light source device 100a than those described above are the same as those of the first embodiment.

[0075] The light source device 100a has the detector 6 provided on the fan holding member 5a, which reduces the number of parts on the support member 2 side and makes it possible to reduce the size of the light source device 100a when the fan holding member 5a is removed. Other effects are the same as those of the first embodiment.

[0076] [Third embodiment] A light source device 100b according to a third embodiment will be described with reference to Fig. 13 and Fig. 14. Fig. 13 is a front view illustrating the configuration of the light source device 100b. Fig. 14 is a diagram illustrating an example of the light source device 100b of Fig. 13 in a state where the fan holding member 5b is opened.

[0077] 13 and 14, light source device 100b has a fan holding member 5b. Fan holding member 5b can be opened and closed with a portion of it attached to support member 2. Fan mechanism 4 can be attached to and detached from the opened fan holding member 5b.

[0078] The fan holding member 5b is opened by rotating it about 90 degrees in the direction of arrow 56 in Fig. 14 (counterclockwise) around a rotary shaft member 55 provided on the fan holding member 5b as the rotation axis. The fan holding member 5b is closed by rotating it from the state shown in Fig. 14 in the direction opposite to the arrow 56 (clockwise) around the rotary shaft member 55 as the rotation axis. However, the rotation angle when opening and closing the fan holding member 5b does not necessarily have to be about 90 degrees and can be changed as appropriate.

[0079] Figure 13 shows the fan holding member 5b in a closed state, and Figure 14 shows it in an open state. When the fan holding member 5b is in an open state, the control-side connector 70 and the fan-side connector 50 are not mated. Furthermore, because the boss 61 is not pressing against the detection unit 6, the detection unit 6 outputs a signal to the control unit 7 indicating that the fan holding member 5b has been removed from the support member 2.

[0080] When the fan holding member 5b is in the opened state, the fan mechanism 4 can be removed from the fan holding member 5b.

[0081] In light source device 100b, fan holding member 5b can be opened and closed with a portion of it attached to support member 2, and fan mechanism 4 can be attached and detached to and from open fan holding member 5b. This makes it easier to attach and detach fan mechanism 4 in light source device 100b, improving the ease of maintenance work. Other effects are the same as in the first embodiment.

[0082] [Fourth embodiment] FIG. 15 is a diagram illustrating the configuration of an image projection device 300 according to the fourth embodiment.

[0083] 15, the image projection device 300 includes a light source device 100d, an exterior / cooling member 9, a projection lens 10, and an image generation unit 11. The image projection device 300 is, for example, a projector.

[0084] Light source device 100d has a red light-emitting unit 1R that emits red light, a green light-emitting unit 1G that emits green light, and a blue light-emitting unit 1B that emits blue light. The function of light source device 100d is similar to that of light source device 100, except that light source device 100d can emit light of three colors. Note that image projection device 300 may have any one of light source devices 100a, 100b, and 100c instead of light source device 100d.

[0085] The image generation unit 11 generates image light based on light emitted from the light source device 100d. Image light refers to light that forms an image. The image generation unit 11 includes, for example, a DMD (Digital Micromirror Device), and generates image light by controlling the tilt of the micromirrors that make up each pixel of the DMD and modulating the reflected light of light that enters the micromirrors. Light emitted by each of the red light-emitting unit 1R, green light-emitting unit 1G, and blue light-emitting unit 1B enters the image generation unit 11, and the image generation unit 11 can generate image light of each color.

[0086] The projection lens 10 projects the image light generated by the image generation unit 11. For example, the projection lens 10 projects the image light onto a screen, a wall, or the like, and allows a user of the image projection device 300 to view the image projected onto the screen or wall.

[0087] By including the light source device 100d, the image projection device 300 can use the light source device 100d even when the fan mechanism is detached from the light source device 100d, thereby eliminating or shortening downtime of the image projection device 300.

[0088] Although one example of an embodiment has been described above, the present invention is not limited to the above embodiment, and various modifications and improvements are possible within the scope of the present invention.

[0089] Each function of the embodiments can be realized by one or more processing circuits. Here, the term "processing circuit" in this specification includes a processor programmed to perform each function by software, such as a processor implemented by an electronic circuit, as well as devices such as an ASIC (Application Specific Integrated Circuit), a DSP (Digital Signal Processor), an FPGA (Field Programmable Gate Array), and conventional circuit modules designed to perform each function described above. [Explanation of symbols]

[0090] 1 Light-emitting part 1R Red light emitting part 1G Green light emitting part 1B Blue light emitting part 2. Support member (an example of a cooling member) 3. Heat pipes (an example of a cooling component) 4 Fan mechanism 41 First fan mechanism 42 Second fan mechanism 5 Fan holding member 50 Fan side connector 51 Air intake 52 exhaust port 53 Mesh-like member 55 Rotating shaft member 6. Detection unit 61 Boss 7 Control Unit 70 Control side connector 701 Exterior materials 702 terminal 71 Attachment / detachment information acquisition unit 72 Selection Reception Section 73 Power supply control section 8. Housing 81 Sealing material 9 Exterior and cooling component 10 Projection lens 11 Image generation unit 100 Light source device 200 Commercial power supply 300 Image projection device D Depth W width [Prior art documents] [Patent documents]

[0091] [Patent Document 1] Patent No. 6651862

Claims

1. a light-emitting unit that emits light in response to supplied power; a support member that supports the light emitting unit; a fan mechanism detachably provided on the support member and configured to blow air onto an object to be cooled; a detection unit that detects attachment / detachment of the fan mechanism to / from the support member; a control unit that controls the amount of power supplied to the light-emitting unit in accordance with a detection result by the detection unit; a cooling member that cools the light-emitting unit, the control unit supplies a predetermined amount of power to the light-emitting unit when the fan mechanism is attached to the support member, and supplies an amount of power less than the predetermined amount to the light-emitting unit when the fan mechanism is detached from the support member; The predetermined amount is an amount of power that does not cause a malfunction or damage to the light-emitting unit and is determined according to the cooling capacity of the cooling member.

2. The light source device according to claim 1 , further comprising a selection receiving unit that receives a user's selection of an amount of power to be supplied to the light emitting unit.

3. a housing that accommodates at least the light emitting unit and the support member; The light source device according to claim 1 , further comprising a sealing member for sealing the inside of the housing.

4. a fan holding member that holds the fan mechanism and is detachable from the support member integrally with the fan mechanism; the fan mechanism is attached to and detached from the support member by attaching and detaching the fan holding member to and from the support member, and is supplied with power via a control-side connector included in the control unit and a fan-side connector provided on the fan holding member; At least one of the control-side connector and the fan-side connector has an exterior member and a terminal held by the exterior member, The light source device according to claim 1 , wherein the terminal is held by the exterior member such that an end of the terminal is positioned at a position recessed from an outer surface of the exterior member.

5. The fan holding member is at least one of an intake port for drawing air into the interior of the fan holding member and an exhaust port for discharging air from the interior of the fan holding member; The light source device according to claim 4 , further comprising a mesh member provided in at least one of the intake port and the exhaust port.

6. the fan holding member has a tubular structure; 6. The light source device according to claim 4, wherein the air blown by the fan mechanism flows inside the tubular structure.

7. the fan holding member is openable and closable with a portion of the fan holding member attached to the support member, The light source device according to claim 4 , wherein the fan mechanism is detachable from the fan holding member when the fan holding member is opened.

8. The light source device according to claim 1 , wherein the detection unit is provided on the support member side.

9. The light source device according to claim 4 , wherein the detection unit is provided on the fan holding member.

10. The light source device according to any one of claims 1 to 9; an image generating unit that generates image light based on light emitted from the light source device; a projection lens that projects the image light generated by the image generation unit.

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