Flexible wiring board, light source device, and projector

Abstract

A flexible wiring board (40) for connecting a light source unit (10) to a power supply unit and an information processing unit, the flexible wiring board (40) having a plurality of wiring layers arranged in the thickness direction, the flexible wiring board (40) being provided with: a plurality of first connectors (41) for respectively connecting to a plurality of light source units; a second connector (42) for connecting to a power supply unit; a third connector (43) for connecting to an information processing unit; a plurality of power supply wirings (44) extending from the plurality of first connectors to the second connector; and a plurality of signal wirings (45) extending from the plurality of first connectors to the third connector. The power supply wiring and the signal wiring are provided in different wiring layers.

Description

Technical Field

[0001] This disclosure relates to flexible wiring boards, light source devices, and projectors. Background Technology

[0002] Patent document 1 discloses a projector having a light source device having multiple light source units (semiconductor lasers).

[0003] [Existing technical documents]

[0004] [Patent Literature]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2015-213057 Utility Model Content

[0006] [The problem that the utility model aims to solve]

[0007] However, each light source unit is sometimes connected to multiple connection objects, such as a power supply unit that supplies power to the light source unit, and an information processing unit that obtains and processes various information indicating the status of the light source unit. When there are multiple connection objects for multiple light source units, the wiring structure connecting them can easily become complex, which may make it difficult to assemble a projector that includes the light source unit.

[0008] This utility model was made in view of the above circumstances, and its purpose is to provide a flexible wiring board, a light source device and a projector that can improve the assemblability of the projector.

[0009] [Methods used to solve problems]

[0010] The first embodiment of this utility model is a flexible wiring board having multiple wiring layers arranged in the thickness direction for connecting multiple light sources, each having a thermistor, to a power supply unit that supplies power to the light sources and an information processing unit that processes information output from the thermistors. The flexible wiring board includes: multiple first connectors for connecting to the multiple light sources respectively; a second connector for connecting to the power supply unit; a third connector for connecting to the information processing unit; multiple power supply wires from the multiple first connectors to the second connector; and multiple signal wires from the multiple first connectors to the third connector. The power supply wires and the signal wires are disposed on different wiring layers.

[0011] The second embodiment of this utility model is a light source device comprising: the flexible wiring board; a plurality of light source units; and a heat sink unit having a mounting surface for mounting the plurality of light source units. The flexible wiring board includes: a plurality of first portions, each with a plurality of first connectors respectively disposed on each of the first portions; second portions, spaced apart from the plurality of first portions, and provided with second connectors and third connectors; and a plurality of connecting portions connecting the plurality of first portions to the second portions respectively. The plurality of first connectors are respectively connected to the plurality of light source units, thereby overlapping the first portions on the mounting surface. The connecting portions and the second portions extend in a direction away from the mounting surface.

[0012] A third embodiment of this utility model is a light source device comprising: the flexible wiring board; a plurality of light source units; a heat sink unit having a mounting surface for accommodating the plurality of light source units; and an optical system unit mounted on the mounting surface. The flexible wiring board includes: a plurality of first portions, each with a plurality of first connectors respectively disposed on each of the first portions; second portions, spaced apart from the plurality of first portions, and provided with second connectors and third connectors; and a plurality of connecting portions connecting the plurality of first portions to the second portions respectively. The plurality of first connectors are respectively connected to the plurality of light source units, thereby overlapping the first portions on the mounting surface. The second portions are fixed to the optical system unit.

[0013] The fourth embodiment of this utility model is a projector comprising: the flexible wiring board; a plurality of the light source units; a power supply unit; an information processing unit; and a housing for housing the flexible wiring board, the light source units, the power supply unit, and the information processing unit. A first portion of the flexible wiring board, which is provided with a plurality of first connectors, is connected to the light source units. A second portion of the flexible wiring board, which is provided with second connectors and third connectors, is fixed to the optical system unit.

[0014] [Utility Model Effect]

[0015] According to this invention, the assemblability of the projector can be improved. Attached Figure Description

[0016] Figure 1 This is a perspective view showing the appearance of a projector according to one embodiment of the present invention.

[0017] Figure 2 It means in Figure 1 A 3D image of the projector showing the state of the casing with the top cover removed.

[0018] Figure 3 It means Figure 2A perspective view showing the positions of the light source device, power supply unit, information processing unit, and air supply fan on the bottom plate of the middle shell.

[0019] Figure 4 It means Figures 1-3 A three-dimensional view of the light source device and the air supply fan.

[0020] Figure 5 It means from Figure 4 The light source device has removed the state of the optical system unit in a three-dimensional view.

[0021] Figure 6 Viewed from the mounting surface side of the heat sink Figure 5 The front view of the structure.

[0022] Figure 7 It means Figure 5 , Figure 6 The main view of the light source section and flexible wiring board in the structure.

[0023] Figure 8 It means Figure 7 Rear view of the light source section and flexible wiring board.

[0024] Figure 9 It means Figure 7 , Figure 8 Side view of the light source section and flexible wiring board.

[0025] Figure 10 It means in Figures 7-9 A diagram showing the layout of power and signal wiring in a flexible patch panel.

[0026] Figure 11 It means Figure 10 A diagram showing the layout of the power supply wiring for a flexible patch panel.

[0027] Figure 12 It means Figure 10 Rear view of the signal wiring layout of the flexible patch panel.

[0028] Figure 13 It is a schematic representation Figures 10-12 A cross-sectional view of the flexible wiring board.

[0029] Figure 14 This is a block diagram illustrating a portion of the structure of a projector according to one embodiment of the present invention.

[0030] Figure 15 This is a diagram illustrating a flexible substrate according to another embodiment of the present invention. Detailed Implementation

[0031] The following is for reference Figures 1-14One embodiment of this utility model will be described.

[0032] like Figures 1-3 As shown, the projector 1 of this embodiment is a device that projects image light (image) onto a display surface such as a screen. The projector 1 includes a light source device 3, an image light forming device 4, a projection device 5, a housing 6, a power supply unit 7, an information processing unit 8, and a fan 9.

[0033] The image light forming apparatus 4 generates image light based on the light output from the light source device 3 described later. Although not shown, the image light forming apparatus 4 includes light modulation elements such as a DMD (Digital Micromirror Device) and a liquid crystal panel, as well as electronic components for controlling the light modulation elements.

[0034] The projection device 5 amplifies the image light output from the image light forming device 4 and projects it onto a display surface such as a screen.

[0035] The housing 6 houses the light source device 3, the image light forming device 4, the projection device 5, the power supply unit 7, the information processing unit 8, and the fan 9. The housing 6 includes: a base plate 61, which houses the light source device 3, the image light forming device 4, the projection device 5, the power supply unit 7, the information processing unit 8, and the fan 9; and an upper cover 62, which covers the light source device 3, the image light forming device 4, the projection device 5, the power supply unit 7, the information processing unit 8, and the fan 9 from above. The upper cover 62 includes a top plate 621 opposite to the base plate 61.

[0036] The power supply section 7 mainly refers to the light source unit 10 of the light source device 3 (see reference 7). Figure 5 , Figure 6 (etc.) Supply power. The power supply unit 7 is located on the bottom plate 61 side of the housing 6.

[0037] The information processing unit 8 connects to the thermistor 13 of the light source unit 10 (described later) Figure 7 The information processing unit 8 processes the information output by the power supply unit 7 and the fan 9. Based on this information, the information processing unit 8 controls the operation of the power supply unit 7 and the fan 9. The information processing unit 8 is disposed on the top plate portion 621 side of the housing 6 relative to the power supply unit 7.

[0038] like Figures 4-6 As shown, the light source device 3 has a light source section 10, a heat dissipation section 20, an optical system unit 30, and a flexible wiring board 40.

[0039] Figure 5 , Figure 6 The light source unit 10 shown emits light. The light source device 3 of this embodiment has multiple (four in the example shown) light source units 10. Figures 6-9As shown, each light source unit 10 has a substrate 11, a light-emitting element 12 mounted on the substrate 11, a thermistor 13, and a connector 14.

[0040] The light-emitting element 12 can be, for example, an LED (Light Emitting Diode), but in this embodiment it is a laser diode. The light-emitting element 12 in this embodiment emits laser light in the blue wavelength region. That is, the light source unit 10 in this embodiment is a laser substrate. The number of light-emitting elements 12 included in the light source unit 10 can be two as shown in the example, but it is not limited to this.

[0041] Thermistor 13 measures the temperature of the light source section 10. Electrical wiring (not shown) connecting the light-emitting element 12 and thermistor 13 to connector 14 is formed on substrate 11. Connector 14 is connected to flexible wiring board 40, which will be described later.

[0042] In the light source unit 10 of this embodiment, when viewed from the thickness direction of the substrate 11, the thermistor 13 is located between the light-emitting element 12 and the connector 14. Therefore, the two power supply lines (not shown) formed on the substrate 11 and connecting the light-emitting element 12 and the connector 14 are located on both sides of the signal line (not shown) formed on the substrate 11 and connecting the thermistor 13 and the connector 14. As a result, when viewed from the thickness direction of the substrate 11, the signal terminal (not shown) of the connector 14 connected to the thermistor 13 is located between the two power supply terminals (not shown) of the connector 14 connected to the light-emitting element 12.

[0043] like Figures 4-6 As shown, the heat dissipation section 20 is used to cool the light source section 10 and has a heat dissipation plate section 21, a plurality of heat dissipation fins 22 and an extended heat dissipation section 24.

[0044] like Figure 5 , Figure 6 As shown, the heat sink portion 21 is formed generally flat and has a mounting surface 21a on which a plurality of light source portions 10 are mounted. Specifically, a substrate 11 on which the light source portions 10 are stacked is disposed overlapping the mounting surface 21a. The substrate 11 may be in direct contact with the mounting surface 21a, but, for example, thermally conductive grease may be placed between the substrate 11 and the mounting surface 21a to improve heat transfer from the substrate 11 to the heat sink portion 21. The heat sink portion 21 is made of, for example, a material with high electrical conductivity such as copper.

[0045] exist Figures 4-6 In this diagram, the X-axis direction represents the first direction along the mounting surface 21a, and the Y-axis direction represents the second direction orthogonal to the first direction along the mounting surface 21a. Additionally, the Z-axis direction represents the orthogonal direction orthogonal to the mounting surface 21a. The Z-axis direction corresponds to the thickness direction of the heat sink portion 21.

[0046] Multiple heat sinks 22 are disposed on a surface of the heat sink portion 21 facing the side opposite to the mounting surface 21a in the thickness direction. Each of the multiple heat sinks 22 is formed as a plate with a thickness direction along the mounting surface 21a of the heat sink portion 21, and is arranged at intervals in the first direction. Figure 5 , Figure 6 In the middle, multiple heat sinks 22 protrude only to one side (the negative Y-axis side) of the heat sink portion 21 in the second direction (Y-axis direction), but for example, they may also protrude to both sides of the heat sink portion 21, or they may not protrude at all.

[0047] The extended heat dissipation section 24 is located on both sides of the heat dissipation plate section 21 in the first direction. Alternatively, the extended heat dissipation section 24 may be located only on one side of the heat dissipation plate section 21 in the first direction, for example.

[0048] The extended heat dissipation section 24 includes a heat pipe 241 and a plurality of heat sinks 242 mounted on the heat pipe 241. The heat pipe 241 extends from both ends of the heat sink section 21 through the heat sink section 21 in a first direction. A plurality of the heat pipes 241 are arranged in a second direction (7 in the example shown in the figure).

[0049] The multiple heat sinks 242 of the extended heat dissipation section 24 are each formed as plates with the thickness direction in the first direction. The multiple heat sinks 242 are arranged at intervals along the first direction on both sides of the heat dissipation plate section 21. The heat pipe 241 is mounted on the multiple heat sinks 242 in such a way that the heat sink 242 passes through it in the thickness direction.

[0050] In the heat dissipation section 20, air flows in an orthogonal direction (Z-axis direction) relative to the plurality of heat sinks 22 and the extended heat dissipation section 24, thereby enabling air to flow between adjacent heat sinks 22 and 242. As a result, heat transferred from the plurality of light source sections 10 to the heat sinks 22 via the heat dissipation plate section 21 and heat transferred to the plurality of heat sinks 242 via the heat dissipation plate section 21 and the heat pipe 241 can be diffused, that is, the plurality of light source sections 10 can be cooled.

[0051] like Figure 4 As shown, the optical system unit 30 is mounted on the mounting surface 21a of the heat sink portion 21 where the light source portion 10 is disposed. The optical system unit 30 processes the light (blue light) from the light source portion 10 appropriately and emits white light into the image light forming apparatus 4. The optical system unit 30 has multiple optical system components (not shown) for processing the light from the light source portion 10 appropriately and a housing 31 for housing these optical system components.

[0052] The housing 31 of the optical system unit 30 has an opening (not shown) that allows light emitted from the light source 10 to enter the interior of the housing 31. The edge of the opening of the housing 31 is in close contact with the area surrounding the light source 10 in the mounting surface 21a, thereby allowing the housing 31 to cover the light source 10. As a result, it is possible to suppress or prevent dust from the outside of the housing 31 from reaching the light source 10.

[0053] Figures 5-9 The flexible wiring board 40 shown is used to connect the light source unit 10 to the power supply unit 7 and the information processing unit 8. The flexible wiring board 40 is formed in one direction (in... Figures 7-9 The flexible wiring board 40 is a sheet-like structure extending in the left-right direction, configured to be easily bent in its thickness direction. It has multiple first connectors 41, a second connector 42, and a third connector 43.

[0054] The plurality of first connectors 41 are terminals for connecting to the plurality of light source units 10 respectively. The number of first connectors 41 corresponds to the number of light source units 10 connected to the same flexible wiring board 40. In this embodiment, the number of light source units 10 connected to the same flexible wiring board 40 is two, but it is not limited to this. The first connectors 41 are directly connected to the connectors 14 of the light source units 10.

[0055] The arrangement of the power supply terminals and signal terminals in the first connector 41 corresponds to the arrangement of the power supply terminals and signal terminals in the connector 14 of the light source unit 10.

[0056] The second connector 42 is a terminal for connection to the power supply unit 7. The second connector 42 is connected to an electrical wiring (not shown) extending from the power supply unit 7. The third connector 43 is a terminal for connection to the information processing unit 8. The third connector 43 is connected to an electrical wiring (not shown) extending from the information processing unit 8.

[0057] The first to third connectors 41 to 43 mentioned above are disposed on the main surface 40a of the flexible wiring board 40 in the thickness direction.

[0058] The flexible wiring board 40 has a plurality of first portions 401 and a second portion 402 arranged at intervals in one direction, and a plurality of connection portions 403 that connect the plurality of first portions 401 to a second portion 402 respectively.

[0059] One of the aforementioned plurality of first connectors 41 is provided at each of the plurality of first portions 401 of the flexible wiring board 40. The aforementioned second and third connectors 42 and 43 are provided at the second portion 402 of the flexible wiring board 40. Furthermore, in the second portion 402, the second connector 42 and the third connector 43 are positioned along the width direction of the flexible wiring board 40 (in... Figure 7, Figure 8 The flexible wiring board 40 is arranged in the same direction as the first part 401 and the second part 402 (in the vertical direction). The width direction of the flexible wiring board 40 is the same as the arrangement direction of the first part 401 and the second part 402 (in the vertical direction). Figure 7 , Figure 8 The center represents the orthogonal direction (left and right).

[0060] In this embodiment, a plurality of first portions 401 and a plurality of connecting portions 403 arranged in the extension direction (one direction) of the flexible wiring board 40 are spaced apart in the width direction of the flexible wiring board 40, which is orthogonal to the extension direction. The number of first portions 401 and connecting portions 403 in the same flexible wiring board 40 is the same, corresponding to the number of first connectors 41 provided in the first portions 401. In the example shown, the number of first connectors 41 in the same flexible wiring board 40 is two, therefore the number of first portions 401 and connecting portions 403 is also two.

[0061] A reinforcing plate 46 is overlapped at the second portion 402 of the flexible wiring board 40, which is provided with second and third connectors 42 and 43. The reinforcing plate 46 increases the rigidity of the second portion 402 of the flexible wiring board 40 and prevents the second portion 402 from bending. The reinforcing plate 46 is overlapped with the main surface 40b of the other side of the flexible wiring board 40.

[0062] like Figures 10-12 As shown, the flexible wiring board 40 has multiple power supply wirings 44 and multiple signal wirings 45.

[0063] like Figure 10 , Figure 11 As shown, multiple power cables 44 extend from multiple first connectors 41 to second connectors 42. When viewed from the thickness direction of the flexible wiring board 40, each power cable 44 is wider than the signal cable 45 described later. Two power cables 44 extend from each first connector 41. The second connector 42 is connected to twice the number of first connectors 41 (two in the example).

[0064] like Figure 10 , Figure 12As shown, multiple signal cables 45 extend from multiple first connectors 41 to a third connector 43. The current flowing through the signal cables 45 is smaller than the current flowing through the power supply cables 44. Therefore, when viewed from the thickness direction of the flexible wiring board 40, each signal cable 45 is thinner than the power supply cable 44. Two signal cables 45 extend from each first connector 41. One of the two signal cables 45 is used for grounding. The multiple grounding signal cables 45 extending from the multiple first connectors 41 converge into one and reach the third connector 43. Therefore, the third connector 43 is connected to a number of signal cables 45 equal to the number of first connectors 41 plus one.

[0065] like Figure 13 As shown, the flexible wiring board 40 has a plurality of wiring layers 47 arranged in its thickness direction. The flexible wiring board 40 may, for example, be constructed by overlapping three or more wiring layers 47, but in this embodiment, it is constructed by overlapping two wiring layers 47. Specifically, the flexible wiring board 40 has a base layer 48, two wiring layers 47 (first wiring layer 471 and second wiring layer 472) formed on both sides of the base layer 48, and cover layers 49 covering the two wiring layers 47 respectively. The base layer 48 and the cover layer 49 are made of an electrically insulating material such as polyimide, and the wiring layers 47 are made of a conductor such as copper.

[0066] The power supply wiring 44 and signal wiring 45 described above are located on different wiring layers 47. Figure 13 In this configuration, power supply wiring 44 is disposed on the first wiring layer 471, and signal wiring 45 is disposed on the second wiring layer 472.

[0067] like Figure 10 As shown, in this embodiment, at each first portion 401 and each connection portion 403 of the flexible wiring board 40, two power supply lines 44 and signal lines 45 extending from the same first connector 41 are located at positions corresponding to the two power supply terminals and signal terminals in the connector 14 of the light source unit 10. Specifically, the signal lines 45 extending from the same first connector 41 are located between the two power supply lines 44 extending from the same first connector 41 in the width direction of the flexible wiring board 40.

[0068] Next, the configuration of the flexible wiring board 40 relative to the light source unit 10, the heat dissipation unit 20, and the optical system unit 30 will be described.

[0069] like Figure 5 , Figure 6As shown, the two first connectors 41 are respectively connected to the connectors 14 of the two light source portions 10 disposed on the mounting surface 21a of the heat sink portion 21, so that the plurality of first portions 401 of the flexible wiring board 40 are disposed overlapping the mounting surface 21a. Moreover, the flexible wiring board 40 is bent at the boundary between the first portion 401 and the connecting portion 403. As a result, the plurality of connecting portions 403 and the second portion 402 of the flexible wiring board 40 are directed away from the mounting surface 21a (in the direction of...). Figure 5 , Figure 6 (The center extends in the positive Z-axis direction). In addition, in this state, the multiple connection portions 403 of the flexible wiring board 40 are arranged at intervals in the width direction of the flexible wiring board 40.

[0070] Specifically, the multiple first portions 401 of the flexible wiring board 40 extend from the multiple light source portions 10 placed on the mounting surface 21a toward the edge of the mounting surface 21a in a first direction. Furthermore, the edge of the mounting surface 21a in the first direction of the flexible wiring board 40 is bent, so that the multiple connecting portions 403 and the second portions 402 of the flexible wiring board 40 extend away from the mounting surface 21a. Therefore, the flexible wiring board 40 (especially the multiple connecting portions 403 and the second portion 402) does not overlap with the extended heat dissipation portion 24 in the orthogonal direction (Z-axis direction). Furthermore, the second and third connectors 42 and 43 provided on the second portion 402 of the flexible wiring board 40 overlap with the extended heat dissipation portion 24 in the orthogonal direction (Z-axis direction). In addition, in this state, the multiple (two in the example) connecting portions 403 of the same flexible wiring board 40 are arranged at intervals in the second direction.

[0071] like Figure 3 , Figure 4 As shown, the second portion 402 of the flexible wiring board 40 is located outside the housing 31 of the optical system unit 30, which is disposed on the mounting surface 21a of the heat sink portion 21. Furthermore, the second portion 402 of the flexible wiring board 40 is fixed to the outer surface of the housing 31 of the optical system unit 30.

[0072] With the second portion 402 of the flexible wiring board 40 fixed to the optical system unit 30, the second connector 42 provided at the second portion 402 is disposed on the bottom plate portion 61 side of the housing 6, similar to the aforementioned power supply unit 7. Furthermore, the third connector 43 provided at the second portion 402, similar to the aforementioned information processing unit 8, is disposed on the top plate portion 621 of the housing 6 (see reference 8). Figure 1 )side.

[0073] like Figure 4As shown, the air supply fan 9 is arranged opposite the heat sink 21 with spaced apart from the multiple heat sinks 22, and is also arranged opposite the extended heat sink 24. The air supply fan 9 delivers air to the multiple heat sinks 22 and the extended heat sink 24 in an orthogonal direction (Z-axis direction). By delivering air through the air supply fan 9, air passes between adjacent heat sinks 22 and 242, thereby cooling the multiple light source units 10.

[0074] Next, mainly refer to Figure 14 This describes the control of the power supply unit 7 and the blower fan 9 by the information processing unit 8.

[0075] like Figure 14 As shown, thermistors 13 of multiple light source units 10 measure the temperature of each light source unit 10 and output the temperature to the information processing unit 8. Based on the temperatures output from the multiple thermistors 13, the information processing unit 8 controls the operation of the power supply unit 7 and the fan 9. Specifically, the information processing unit 8 controls the voltage output from the power supply unit 7 and the rotational speed of the fan 9 to ensure that the temperatures of the multiple light source units 10 are at or near a predetermined temperature. Furthermore, the "predetermined temperature" can be, for example, a temperature lower than the heat resistance temperature of the light source unit 10.

[0076] For example, if the temperature measured in the thermistor 13 is higher than the specified temperature, the information processing unit 8 reduces the driving voltage of the light source unit 10 output from the power supply unit 7, or increases the speed of the blower fan 9. By reducing the driving voltage of the light source unit 10 output from the power supply unit 7, the heat generated by the light source unit 10 can be suppressed to a lower level. In addition, by increasing the speed of the blower fan 9, the light source unit 10 can be cooled more efficiently.

[0077] The flexible wiring board 40 of this embodiment includes multiple first connectors 41 connected to multiple light source units 10, a second connector 42 connected to a power supply unit 7, a third connector 43 connected to an information processing unit 8, multiple power supply cables 44 connecting the multiple first connectors 41 and the second connector 42, and multiple signal cables 45 connecting the multiple first connectors 41 and the third connector 43. Therefore, multiple light source units 10 can be connected to the power supply unit 7 and the information processing unit 8 (i.e., multiple connection objects) using only one flexible wiring board 40. This simplifies the wiring structure for connecting the multiple light source units 10 to the power supply unit 7 and the information processing unit 8. Consequently, the assemblability of the projector 1 can be improved.

[0078] Furthermore, in the flexible wiring board 40 of this embodiment, the power supply wiring 44 and the signal wiring 45 are disposed on different wiring layers 47 (first and second wiring layers 471 and 472). This allows for a simple layout of the power supply wiring 44 and the signal wiring 45, preventing interference between them. Additionally, the size (area) of the flexible wiring board 40 when viewed from its thickness direction can be minimized.

[0079] Furthermore, in the flexible wiring board 40 of this embodiment, a reinforcing plate 46 is overlapped and provided on the second portion 402 where the second and third connectors 42 and 43 are provided. As a result, the rigidity of the second portion 402 of the flexible wiring board 40 can be increased by using the reinforcing plate 46, thereby preventing the second portion 402 from bending.

[0080] Furthermore, in the flexible wiring board 40 of this embodiment, one of each of the plurality of first connectors 41 is provided at each of the plurality of first portions 401. Additionally, one of the plurality of connection portions 403 is connected to each of the plurality of first portions 401. Therefore, compared to the case where the plurality of first connectors 41 are provided at one first portion 401, materials constituting the flexible wiring board 40 (particularly the base layer 48 and the cover layer 49) can be saved, and the manufacturing cost of the flexible wiring board 40 can be reduced. This effect is particularly effective when the plurality of first connectors 41 are arranged at intervals.

[0081] Furthermore, in the light source device 3 of this embodiment, which includes the flexible wiring board 40, the multiple first portions 401 of the flexible wiring board 40, each provided with one of the multiple first connectors 41, are arranged overlapping the mounting surface 21a of the heat sink portion 21 by connecting to the light source portion 10. Additionally, the second portions 402 of the flexible wiring board 40, which are provided with second connectors 42 and third connectors 43, extend in a direction away from the mounting surface 21a.

[0082] Therefore, it is possible to prevent the second portion 402 of the flexible wiring board 40 from overlapping with the plurality of heat sinks 22 and extended heat dissipation portions 24 located outside the mounting surface 21a of the heat sink portion 21 in the orthogonal direction (Z-axis direction). As a result, it is possible to suppress the situation where the second portion 402 of the flexible wiring board 40 obstructs the flow of air through the plurality of heat sinks 22 and extended heat dissipation portions 24 by means of the fan 9, that is, it is possible to suppress the situation where the cooling of the light source portion 10 is obstructed.

[0083] Furthermore, in the light source device 3 of this embodiment, which includes the flexible wiring board 40, the second portion 402 of the flexible wiring board 40, including the second connector 42 and the third connector 43, is fixed to the optical system unit 30 mounted on the mounting surface 21a of the heat sink portion 21. Therefore, compared to the case where the second portion 402 of the flexible wiring board 40 is fixed to the heat sink portion 20 including the heat sink portion 21, the heat sink portion 20 can be miniaturized. In addition, by fixing the second portion 402 of the flexible wiring board 40 to the heat sink portion 20, it is also possible to prevent the heat sink portion 20 from reducing the cooling performance of the light source portion 10.

[0084] Furthermore, in the projector 1 of this embodiment, which includes the flexible wiring board 40, the power supply unit 7 and the second connector 42 are disposed on the bottom plate portion 61 side of the housing 6. The information processing unit 8 is disposed opposite the power supply unit 7 on the top plate portion 621 side of the housing 6, opposite the bottom plate portion 61. The third connector 43 is disposed opposite the second connector 42 on the top plate portion 621 side of the housing 6. Therefore, the electrical wiring connecting the second connector 42 and the power supply unit 7, and the electrical wiring connecting the third connector 43 and the information processing unit 8, can be made shorter. Furthermore, tangling of these electrical wirings can be prevented.

[0085] The embodiments of this utility model have been described above, but this utility model is not limited to the above embodiments and can be appropriately modified without departing from its spirit.

[0086] In the flexible wiring board of this utility model, for example, Figure 15 As shown, the number of first portions 401 and connecting portions 403 can be one, or multiple first connectors 41 can be provided in one first portion 401. In other words, the first portion 401 and connecting portions 403 can also not be divided into multiple parts. Even with such a structure, the same effect as the above-described embodiment can be achieved.

[0087] In this invention, the heat dissipation part 20 only needs to have at least a heat dissipation plate part 21.

[0088] In this invention, the number of connection objects of the light source unit 10 is not limited to the power supply unit 7 and the information processing unit 8; for example, it can be three or more. In this case, if the number of light source units 10 is set to m (m: an integer) and the number of connection objects is set to n (n: an integer), then the flexible wiring board 40 can have m first connectors 41, n connection object connectors, and n types of connection wiring that connect each first connector 41 to the n connection object connectors respectively. Moreover, the n types of connection wiring can be provided in different wiring layers. In addition, the "connection object connectors" mentioned above correspond to the second connector 42 and the third connector 43 in the above embodiment. In addition, the "connection wiring" corresponds to the power supply wiring 44 and the signal wiring 45 in the above embodiment.

[0089] [Explanation of reference numerals in the attached figures]

[0090] 1. Projector

[0091] 3. Light source device

[0092] 6. Shell

[0093] 7. Power Supply Department

[0094] 8. Information Processing Department

[0095] 10. Light Source Section

[0096] 13 Thermistors

[0097] 20 Heat dissipation section

[0098] 21 Heat sink section

[0099] 21a Placement Surface

[0100] 30 Optical System Units

[0101] 40 Flexible Wiring Board

[0102] 401 Flexible wiring board 40, first part

[0103] 402 Flexible wiring board 40, second part

[0104] 403 Flexible wiring board 40 connection part

[0105] 41 First Connector

[0106] 42 Second Connector

[0107] 43 Third Connector

[0108] 44 Power supply wiring

[0109] 45. Signal wiring

[0110] 46 Reinforcing Plate

[0111] 47 Wiring Layer

[0112] 61. Base plate section

[0113] 621 Top Plate

Claims

1. A flexible wiring board having a plurality of wiring layers arranged in the thickness direction, for connecting a plurality of light source units, each having a thermistor, to a power supply unit that supplies power to the light source units and an information processing unit that processes information output from the thermistors, characterized in that, The flexible wiring board includes: Multiple first connectors are provided for connection to the multiple light source portions, respectively. A second connector for connection to the power supply unit; A third connector for connection to the information processing unit; Multiple power supply wirings extend from multiple first connectors to the second connector; and Multiple signals are connected via wiring from multiple first connectors to the third connector. The power supply wiring and the signal wiring are disposed on different wiring layers.

2. The flexible wiring board according to claim 1, wherein, The flexible wiring board has the following features: Multiple first parts, and multiple first connectors are respectively disposed in each of the first parts; The second part is arranged at intervals relative to the plurality of first parts and is provided with the second connector and the third connector; and Multiple connecting parts are used to connect the multiple first parts to the second parts respectively. A reinforcing plate is overlapped at the second part.

3. The flexible wiring board according to claim 1 or 2, wherein, The flexible wiring board has the following features: Multiple first parts, and multiple first connectors are respectively disposed in each of the first parts; The second part is arranged at intervals relative to the plurality of first parts and is provided with the second connector and the third connector; and Multiple connecting parts are used to connect the multiple first parts to the second parts respectively. The plurality of first portions and the plurality of connecting portions are arranged at intervals along the width direction of the flexible wiring board, which is orthogonal to the arrangement direction of the plurality of first portions and second portions. The number of the first part and the number of the connecting parts correspond to the number of the first connectors.

4. The flexible wiring board according to claim 1 or 2, wherein, When viewed from the thickness direction of the flexible wiring board, the signal wiring is thinner than the power wiring.

5. The flexible wiring board according to claim 1 or 2, wherein, The flexible wiring board has the following features: Multiple first parts, and multiple first connectors are respectively disposed in each of the first parts; The second part is arranged at intervals relative to the plurality of first parts and is provided with the second connector and the third connector; and Multiple connecting parts are used to connect the multiple first parts to the second parts respectively. At each of the plurality of first portions and the plurality of connection portions, the signal wiring extending from the same first connector is located between two power wirings extending from the same first connector in the width direction of a flexible wiring board orthogonal to the arrangement direction of the plurality of first portions and second portions.

6. The flexible wiring board according to claim 1, wherein, The flexible wiring board has the following features: A first part is provided with multiple first connectors; A second portion is disposed at a distance from the first portion and is provided with the second connector and the third connector; and A connecting portion connects the first portion and the second portion. A reinforcing plate is overlapped at the second part.

7. A light source device, characterized in that, The light source device includes: The flexible wiring board according to claim 1 or 2; Multiple light source units; and The heat sink portion has a mounting surface for mounting a plurality of the light source portions. The flexible wiring board has the following features: Multiple first parts, and multiple first connectors are respectively disposed in each of the first parts; The second part is arranged at intervals relative to the plurality of first parts and is provided with the second connector and the third connector; and Multiple connecting parts are used to connect the multiple first parts to the second parts respectively. Each of the first connectors is connected to a plurality of the light source portions, thereby overlapping the plurality of first portions on the mounting surface. The plurality of connection portions and the second portion extend in a direction away from the mounting surface.

8. The light source device according to claim 7, wherein, The plurality of connection portions are arranged at intervals along the width of the flexible wiring board, which is orthogonal to the arrangement directions of the plurality of first portions and second portions.

9. A light source device, characterized in that, The light source device includes: The flexible wiring board according to claim 1 or 2; Multiple light source units; The heat sink portion has a mounting surface for mounting a plurality of the light source portions; and Optical system unit, mounted on the mounting surface, The flexible wiring board has the following features: Multiple first parts, and multiple first connectors are respectively disposed in each of the first parts; The second part is arranged at intervals relative to the plurality of first parts and is provided with the second connector and the third connector; and Multiple connecting parts are used to connect the multiple first parts to the second parts respectively. Each of the first connectors is connected to a plurality of the light source portions, thereby overlapping the plurality of first portions on the mounting surface. The second part is fixed to the optical system unit.

10. A projector, characterized in that, The projector has the following features: The flexible wiring board according to claim 1 or 2; Multiple light source units; The power supply department; The information processing unit; and The housing houses the flexible wiring board, the light source unit, the power supply unit, and the information processing unit. The power supply unit and the second connector are disposed on the bottom plate side of the housing. The information processing unit is disposed relative to the power supply unit on the top plate side of the housing, opposite to the bottom plate. The third connector is disposed on the top plate side of the housing relative to the second connector.

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