Lighting device

Abstract

The lighting device includes: a heat sink; a light source disposed on one side in the axial direction with respect to the heat sink and cooled by the heat sink; an optical member disposed on one side in the axial direction with respect to the light source; and a first mounting member that mounts the light source and the optical member to the heat sink.

Description

Technical Field

[0001] The present disclosure relates to lighting devices. Background Art

[0002] A lighting device having a light source, a heat sink, and a reflector is known (for example, see Patent Documents 1 and 2). The heat sink is used to cool the light source, and the reflector is used to reflect the light of the light source in a direction along the optical path of the incident light. When assembling the light source, the heat sink, and the reflector, etc., which are components of the lighting device, many mounting components are required.

[0003] Here, in order to add further functions to the lighting device, other components such as lenses and covers are sometimes installed. In this case, not only the number of parts increases, but also the load is concentrated on one installation component depending on the installation method of the additional component, and the rigidity of the installation component needs to be improved, resulting in the overall enlargement of the lighting device, which is not preferred.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2021-166200

[0007] Patent Document 2: Japanese Patent Application Publication No. 2021-197357 Summary of the invention

[0008] Technical problem to be solved by the invention

[0009] There is a demand for a lighting device that can suppress the concentration of load on a specific mounting member when there are a plurality of mounting members to which components of the lighting device are mounted.

[0010] An object of the present disclosure is to provide a lighting device that suppresses the concentration of load on a specific mounting member when there are a plurality of mounting members to which components are mounted.

[0011] Technical solutions for solving technical problems

[0012] An illumination device according to one aspect of the present disclosure includes: a heat sink; a light source arranged on one side of a first direction relative to the heat sink and cooled by the heat sink; an optical component arranged on one side of the first direction relative to the light source; and a first mounting component for mounting the light source and the optical component on the heat sink. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic perspective view of the lighting device involved in the embodiment.

[0014] Figure 2 yes Figure 1Exploded three-dimensional diagram.

[0015] Figure 3 is along Figure 1 Schematic cross-sectional view of line III-III.

[0016] Figure 4 is along Figure 1 Schematic cross-sectional view of line IV-IV.

[0017] Figure 5 is along Figure 1 Schematic cross-sectional view of line VV.

[0018] Figure 6 This is a schematic diagram of a liquid crystal panel viewed from the front side.

[0019] Figure 7 is a schematic diagram showing a surface of a first substrate included in a liquid crystal panel.

[0020] Figure 8 This is a schematic diagram showing the surface on which wiring is provided by turning over the second substrate included in the liquid crystal panel.

[0021] Fig. 9 is along Figure 7 IX-IX cross-sectional view. DETAILED DESCRIPTION

[0022] With reference to the accompanying drawings, the mode (embodiment) for implementing the present disclosure is described in detail. The present disclosure is not limited to the contents described in the following embodiments. In addition, the constituent elements described below include elements that can be easily thought of by those skilled in the art, and substantially the same elements. Furthermore, the constituent elements described below can be appropriately combined.

[0023] It should be pointed out that what is disclosed is only an example after all, and appropriate changes that maintain the main purpose of the disclosure that can be easily thought of by those skilled in the art are of course also included in the scope of the present disclosure. In addition, in order to make the description clearer, the width, thickness, shape, etc. of each part in the drawings are sometimes schematically represented compared to the actual aspects, but it is only an example after all and does not limit the interpretation of the present disclosure. In addition, in this specification and each drawing, the same figure mark is marked for the same elements as those described in the drawings that have appeared, and the detailed description is sometimes appropriately omitted.

[0024] First, the structure of the lighting device according to the embodiment will be described. Figure 1 It is a schematic perspective view of the lighting device involved in the embodiment. Figure 2 yes Figure 1 Exploded three-dimensional diagram. Figure 3 is along Figure 1 Schematic cross-sectional view of line III-III. Figure 4 is along Figure 1 Schematic cross-sectional view of line IV-IV. Figure 5 is along Figure 1 Schematic cross-sectional view of line VV.

[0025] like Figures 1 to 4 As shown, the lighting device 100 includes an optical element 1A, a holder (second mounting member) 2, a reflector (optical member) 3, an LED (light source) 4, a second holding member (first mounting member) 5, a heat sink 6, a base member (first mounting member) 7, a control substrate 8 and an FPC (wiring) 110, which are arranged along the axial direction of the central axis AX. The second holding member 5 and the base member 7 are also referred to as the first mounting member, and the holder 2 is also referred to as the second mounting member. It should be noted that the axial direction is also referred to as the first direction, one side of the axial direction is the D1 side (one side of the first direction), and the other side of the axial direction is the D2 side (the other side of the first direction).

[0026] The optical element 1A includes a plurality of liquid crystal panels 1. The liquid crystal panels 1 are thin flat plates, and for example, four liquid crystal panels 1 are overlapped in the axial direction. That is, in this embodiment, the optical element 1A includes four liquid crystal panels 1 overlapped in the axial direction. The number of liquid crystal panels 1 is not particularly limited. The plurality of liquid crystal panels 1 are alternately stacked in the axial direction with liquid crystal panels for p-wave polarization and liquid crystal panels for s-wave polarization. Figure 3 as well as Figure 4 As shown, the liquid crystal panel 1 is mounted on the holder 2. The structure of the liquid crystal panel 1 will be described in detail later.

[0027] like Figure 3 as well as Figure 4 As shown, the holder 2 includes a main body 21 and a fitting member 22. The fitting member 22 is located on one side of the main body 21 in the axial direction, that is, the D1 side. The fitting member 22 has a retaining piece 26 on the D1 side. The inner peripheral side of the retaining piece 26 is an opening 25. The fitting member 22 has a claw 23 on the D2 side. A plurality of claws 23 are provided along the circumferential direction around the central axis AX. The main body 21 is cylindrical, and a supporting member 24 is provided at the end on the D1 side, and a protrusion 28 is provided at the end on the D2 side. The supporting member 24 extends radially inward, and a fitting groove 27 is provided at the radially outer side of the supporting member 24. The fitting member 22 is mounted on the main body 21 by fitting the claw 23 with the fitting groove 27. In addition, the outer peripheral end 140 of the liquid crystal panel 1 is sandwiched between the supporting member 24 and the retaining piece 26. Thus, four liquid crystal panels 1 are mounted on the holder 2. Then, the holder 2 is attached to the base member 7 by fitting the protrusion 28 of the main body 21 into the claw 722 of the first holding member 72 of the base member 7 described later.

[0028] like Figures 1 to 4As shown, the reflector 3 includes a main body 31, a flange 32 and a protrusion 33. The reflector 3 is located on the D1 side relative to the LED 4. The main body 31 is cylindrical. Specifically, the main body 31 has a cylindrical shape whose diameter increases from the end 31a to the end 31b as it moves toward the D1 side. At the end 31b, the flange 32 extends radially outward. A protrusion 33 is provided at the end 31a of the main body 31. The protrusion 33 protrudes radially outward. The protrusion 33 is embedded in the groove 56 of the outer annular portion 52 of the second holding member 5 described later. Thus, the reflector 3 is mounted on the second holding member 5. The reflector 3 is a reflecting plate that reflects light from the LED 4 as a light source, and guides the light to the liquid crystal panel 1 while reflecting the light. It should be pointed out that in the present invention, optical components other than the reflector 3, such as lenses, etc., can be used.

[0029] like Figures 1 to 4 As shown, the second holding member 5 includes an inner annular portion 51, an outer annular portion 52, and a connecting portion 54. The second holding member 5 is fastened to the end portion on the D1 side of the elongated member 73 via a bolt. The inner annular portion 51 is arranged on the D2 side of the second holding member 5, and the outer annular portion 52 is arranged on the D1 side of the second holding member 5. The inner annular portion 51 is integrated with the outer annular portion 52 via a connecting portion 54. A protrusion 53 is provided on the outer annular portion 52 to protrude radially outward. A through hole 55 is provided in the protrusion 53. The inner annular portion 51 and the outer annular portion 52 are arranged at intervals in the axial direction. Therefore, after the protrusion 33 of the reflector 3 is inserted into the groove 56 of the second holding member 5, the reflector 3 is rotated so that the protrusion 33 is engaged between the inner annular portion 51 and the outer annular portion 52, and the reflector 3 is mounted on the second holding member 5 as described above. The reflector 3 is arranged on the D1 side of the second holding member 5, and the LED 4 is arranged on the D2 side of the second holding member 5. That is, the second holding member 5 is arranged between the LED 4 and the reflector 3 in the axial direction.

[0030] LED (Light Emitting Diode) 4 is a light source. It should be noted that in addition to LED, various light sources can also be applied. LED 4 is arranged on the D1 side relative to heat sink 6. LED 4 is arranged between second holding member 5 and heat sink 6. Specifically, it is sandwiched between second holding member 5 and heat sink 6 and held. LED 4 is cooled by heat sink 6.

[0031] The heat sink 6 is arranged on the D2 side relative to the second holding member 5. The heat sink 6 extends in the axial direction. The heat sink 6 includes a main body 61 and fins 62. The heat sink 6 is made of metal, for example. The main body 61 is a cylinder extending from an axial end 66 to an axial end 67 in the axial direction. The axial end 66 abuts against the LED 4. The fins 62 are provided on the outer peripheral surface 64 of the main body 61. The fins 62 protrude radially outward from the outer peripheral surface 64 of the main body 61. The fins 62 extend in the axial direction (first direction). A plurality of fins 62 are arranged at equal intervals along the circumferential direction on the entire circumference of the outer peripheral surface 64 of the main body 61.

[0032] like Figure 2 As shown, the fin 62 includes a first fin 62A and a second fin 62B. The height of the first fin 62A from the outer peripheral surface of the main body 61 is a first height H1. The height of the second fin 62B from the outer peripheral surface of the main body 61 is a second height H2. The second height H2 is lower than the first height H1. The long strip member 73 is arranged radially outside the second fin 62B.

[0033] The base member 7 includes a third holding member 71, a first holding member 72, and a plurality of elongated members 73. The third holding member 71 is provided with a through hole 714, a through hole 711, a groove 712, and a through hole 713. A pair of through holes 714 are provided on the radial inner side of the third holding member 71. The through holes 714 of the third holding member 71 correspond to the bolt holes 68 of the heat sink 6. The third holding member 71 is mounted on the axial end 67 of the heat sink 6 by inserting bolts into the through holes 714 and the bolt holes 68 and tightening them. The first holding member 72 is provided on the outer periphery of the heat sink 6 and extends in the circumferential direction of the heat sink 6. The first holding member 72 is annular (in the shape of a ring) extending in the direction around the central axis AX.

[0034] Four long strip members 73 are mounted on the inner side of the first retaining member 72. Each long strip member 73 extends in the axial direction. The long strip member 73 extends in the axial direction on the outer side of the heat sink 6. A bolt hole 735 is provided at the axial end 733 on the D1 side of the long strip member 73, and a bolt hole is provided at the axial end 734 on the D2 side of the long strip member 73. On the radial outer side of the long strip member 73, a plurality of wall portions 736 are arranged at equal intervals in the axial direction. A recessed portion 732 that is recessed from the outer peripheral surface 731 toward the radial inner side is provided between two axially adjacent wall portions 736.

[0035] The first retaining member 72 includes an annular body 721, a claw portion 722, a protruding portion 723, and a protrusion 724. The annular body 721 is arranged in an annular shape along the circumferential direction around the central axis AX. The inner circumferential surface of the annular body 721 abuts against the radial outer end 65 of the fin 62. The claw portion 722 protrudes from the end surface on the D1 side of the annular body 721 toward the D1 side. As described above, the protrusion 28 of the main body 21 is engaged with the claw portion 722. The protruding portion 723 extends in the axial direction. As shown in FIG. Figure 4 As shown, the protrusion 723 is fitted into the groove 29 of the main body 21. Thus, the first holding member 72 and the main body 21 are positioned in the circumferential direction. The protrusion 724 protrudes radially inward from the inner circumferential surface of the annular main body 721.

[0036] Here, if Figure 5 As shown, the protrusion 724 is fitted into the recess 732 of the long strip member 73. In other words, the protrusion 724 abuts against the wall surface of a pair of wall portions 736 fitted outside the long strip member 73. Thus, the first retaining member 72 is positioned relative to the axial direction of the long strip member 73. Figure 2 As shown, the specified recesses among the plurality of recesses 732 are set as the first recess 732A and the second recess 732B. The second recess 732B is located closer to the D2 side than the first recess 732A. In addition, when the protrusion 724 is engaged with the first recess 732A, the axial distance between the LED4 and the liquid crystal panel 1 is set as the first distance. When the protrusion 724 is engaged with the second recess 732B, the axial distance between the LED4 and the liquid crystal panel 1 is set as the second distance. The first distance is greater than the second distance. It should be noted that, Figure 5 As shown by the two-dot chain line, a through hole 736a may be formed by penetrating the bottom of the recess.

[0037] In addition, the bolt hole 735 provided at the axial end 733 on the D1 side of the long member 73 corresponds to the through hole 55 of the protrusion 53 of the second holding member 5. After the bolt hole 735 is butted with the through hole 55, a bolt is inserted into the bolt hole 735 and the through hole 55 for tightening, thereby fastening the second holding member 5 to the long member 73. The end on the D2 side of the long member 73, that is, the axial end 734, is engaged with the groove 712 of the third holding member 71. The third holding member 71 is fastened to the long member 73 by inserting the bolt into the through hole 713 and the bolt hole of the axial end 734 for tightening. Thus, the relative position of the long member 73 with respect to the heat sink 6 in the axial direction is fixed.

[0038] The control substrate 8 includes a first substrate 81 and a second substrate 82. The first substrate 81 and the second substrate 82 both have a disc shape. The second substrate 82 is located closer to the D1 side than the first substrate 81. The first substrate 81 and the second substrate 82 are connected via three spacers 83. Three spacers 84 are installed on the D1 side of the second substrate 82. The second substrate 82 is installed on the third holding member 71 by inserting and fitting the front end of the D1 side of the spacer 84 into the through hole 711 of the third holding member 71. It should be noted that the first substrate 81 and the second substrate 82 can also be an integrated component.

[0039] In addition, if Figure 3As shown in FIG. 1 , the terminals of the second substrate 82 are electrically connected to the terminal portion 150 of the liquid crystal panel 1 via four FPCs 110 extending in the axial direction. There are four liquid crystal panels 1, and one FPC 110 is electrically connected to the terminal portion 150 of one liquid crystal panel 1. Specifically, two of the four FPCs 110 are arranged in the middle of the lighting device 100. Figure 3 The upper portion shown in FIG. 1 extends from the terminal of the second substrate 82 toward one side in the axial direction, i.e., the D1 side, passes through the gap between the first holding member 72 and the end 21a of the main body 21, and is connected to the terminal portion 150 of the second and fourth liquid crystal panels 1 from the D1 side among the four liquid crystal panels 1. The remaining two FPCs 110 of the four are arranged in the portion of the lighting device 100. Figure 3 The lower portion shown in the figure extends from the terminal of the second substrate 82 toward one side in the axial direction, i.e., the D1 side, and after passing through the gap between the first holding member 72 and the end 21a of the main body 21, is connected to the terminal portion 150 of the first and third liquid crystal panels 1 from the D1 side among the four liquid crystal panels 1. When a voltage is applied to the liquid crystal panel 1 via the FPC 110, the orientation of the liquid crystal molecules changes, and the optical characteristics change. The first substrate 81 is electrically connected to the power supply of the entire lighting device 100. It should be noted that the terminal of the second substrate 82 is electrically connected to the LED 4 via the wiring 120 extending in the axial direction. Specifically, the wiring 120 extends from the terminal of the second substrate 82 toward one side in the axial direction, i.e., the D1 side, and after passing through the gap between the first holding member 72 and the end 21a of the main body 21, is connected to the LED 4. Thus, the FPC 110 and the wiring 120 are arranged so as to be restrained from moving in a radial direction intersecting the central axis AX through the gap between the first holding member 72 and the end portion 21 a of the main body 21 and, for example, restrained from protruding outside the holder 2 .

[0040] Next, the structure of the liquid crystal panel 1 is described. The front side of the liquid crystal panel 1 is one side in the axial direction (D1 side, one side in the first direction), and the back side of the liquid crystal panel 1 is the other side in the axial direction (D2 side, the other side in the first direction). Figures 6 to 9 In the XYZ coordinates shown, the X direction is orthogonal to the Y direction. The X1 side is opposite to the X2 side, and the Y1 side is opposite to the Y2 side. The Z direction is orthogonal to the X direction and the Y direction. The Z1 side is opposite to the Z2 side. The Z direction is also called the axial direction (first direction). The Z1 side is the D1 side, and the Z2 side is the D2 side.

[0041] Figure 6 This is a schematic diagram of a liquid crystal panel viewed from the front side. Figure 7 is a schematic diagram showing a surface of a first substrate included in a liquid crystal panel. Figure 8 This is a schematic diagram showing the surface on which wiring is provided by turning over the second substrate included in the liquid crystal panel. Fig. 9 is along Figure 7IX-IX cross-sectional view.

[0042] like Figure 6 As shown, the liquid crystal panel 1 includes a first substrate 2A and a second substrate 3A arranged on the Z1 side of the first substrate 2A. The liquid crystal panel 1 is a regular octagon when viewed from above, and has a first side 11, a second side 12, a third side 13, a fourth side 14, a fifth side 15, a sixth side 16, a seventh side 17 and an eighth side 18. In the present invention, the outer shape of the liquid crystal panel 1 is not particularly limited, and polygons other than the octagon, as well as circles and ellipses are also included in the present invention. It should be noted that in the present embodiment, the liquid crystal panels 1 stacked in the Z direction (axial direction) constitute four identical liquid crystal panels 1. However, two liquid crystal panels 1 adjacent to each other in the Z direction (axial direction) are arranged in a circle. Figure 6 The panels are stacked with the central axis AX shown rotated 90 degrees relative to each other. That is, the four liquid crystal panels 1 are stacked in the order of p-wave polarization liquid crystal panel, s-wave polarization liquid crystal panel, p-wave polarization liquid crystal panel, and s-wave polarization liquid crystal panel in the axial direction.

[0043] The first side 11 is located on the Y1 side of the liquid crystal panel 1. The first side 11 is parallel to the X direction in the figure. Figure 7 The first side 211 of the first substrate 2A shown in FIG. Figure 8 The first side 311 of the second substrate 3A shown in FIG. 1 is located closer to the Y2 side than the first side 211 of the first substrate 2A. Figure 6 As shown in FIG. 1 , in a state where the second substrate 3A is stacked on the front side of the first substrate 2A, an end portion 2Ac of the first substrate 2A on the Y1 side is exposed. A first terminal group 10 is provided at the end portion 2Ac.

[0044] The second side 12 is located on the X1 side of the liquid crystal panel 1. The second side 12 is parallel to the Y direction in the figure. Figure 7 The second side 212 of the first substrate 2A shown is consistent. In contrast, Figure 8 The second side 312 of the second substrate 3A shown in FIG. 1 is located closer to the X2 side than the second side 212 of the first substrate 2A. Figure 6 As shown in FIG. 1 , in a state where the second substrate 3A is stacked on the front side of the first substrate 2A, an end portion 2Ad on the X1 side of the first substrate 2A is exposed. A second terminal group 20 is provided at the end portion 2Ad.

[0045] The third side 13 intersects both the X1 direction and the Y1 direction. The intersection angle is 45 degrees. Figure 7 The third side 213 of the first substrate 2A shown is consistent. In contrast, Figure 8The third side 313 of the second substrate 3A shown in FIG. 1 is located closer to the X2 side and the Y2 side than the third side 213 of the first substrate 2A. In other words, when viewed from above, the third side 313 of the second substrate 3A is located closer to the center side than the third side 213 of the first substrate 2A. Figure 6 As shown, in a state where the second substrate 3A is stacked on the front side of the first substrate 2A, the end portion 2Ae of the first substrate 2A is exposed.

[0046] The fourth side 14 intersects both the X1 direction and the Y2 direction. The intersection angle is 45 degrees. Figure 7 The fourth side 214 of the first substrate 2A and Figure 8 The fourth sides 314 of the second substrates 3A are shown overlapping.

[0047] The fifth side 15 is located on the Y2 side of the liquid crystal panel 1. Figure 7 The fifth side 215 of the first substrate 2A and Figure 8 The fifth sides 315 of the second substrates 3A are shown overlapping.

[0048] The sixth side 164 intersects both the X2 direction and the Y2 direction. The intersection angle is 45 degrees. Figure 7 The sixth side 216 of the first substrate 2A and Figure 8 The sixth sides 316 of the second substrates 3A are shown overlapping.

[0049] The seventh side 17 is located on the X2 side of the liquid crystal panel 1. Figure 7 The seventh side 217 of the first substrate 2A and Figure 8 The seventh sides 317 of the second substrates 3A are shown overlapping.

[0050] The eighth side 18 intersects both the X2 direction and the Y1 direction. The intersection angle is 45 degrees. Figure 7 The eighth side 218 of the first substrate 2A and Figure 8 The eighth sides 318 of the second substrates 3A are shown overlapping.

[0051] Thus, since the area of ​​the second substrate 3A is smaller than that of the first substrate 2A, the first terminal group 10 provided at the end 2Ac of the first substrate 2A and the second terminal group 20 provided at the end 2Ad are exposed. Figure 3 The terminal portion 150 shown in FIG. 1 is electrically connected to the first terminal group 10 or the second terminal group 20 and the FPC 110 described above.

[0052] Next, refer to Figure 7 as well as Figure 8 The first substrate 2A and the second substrate 3A are described. It should be noted that Figure 8 3Aa is a schematic diagram showing the surface of the second substrate 3A and the surface on which wiring is provided among the surface and the back surface. Figure 8 The orientation of X1 and X2 in the second substrate 3A is Figure 7 The directions of X1 and X2 in the first substrate 2A are opposite. Figure 7 2 shows a center line CL1 passing through the center of the first substrate 2A in the X direction and extending in the Y direction, and a center line CL2 passing through the center of the first substrate 2A in the Y direction and extending in the X direction. Figure 7 As shown, in the end portion 2Ac along the first side 211 of the first substrate 2A, a first terminal group 10 is provided at the first end portion 21A (indicated by a double-dashed line) which is closer to the second side 212 (or the third side 213) than the center of the first side 211. That is, the end portion 2Ac is an end portion on the Y1 side of the first substrate 2A, and the first end portion 21A indicated by a double-dashed line is arranged at a position closer to the X1 side than the center line CL1 in the portion of the end portion 2Ac. The first terminal group 10 is provided at the first end portion 21A. As shown Figure 7 As shown, the first terminal group 10 includes a first terminal 101, a second terminal 102, a third terminal 103 and a fourth terminal 104. The first terminal 101, the second terminal 102, the third terminal 103 and the fourth terminal 104 are arranged in sequence from the X1 side to the X2 side in the X direction. These terminals 101, 102, 103, 104 have a pair of short sides 105 parallel to the first side 211 and a pair of long sides 106 parallel to the second side 212.

[0053] In addition, if Figure 7 As shown, in the end portion 2Ad along the second side 212 of the first substrate 2A, a second terminal group 20 is provided at a second end portion 22A (indicated by a double-dashed line) that is closer to the first side 211 (or the third side 213) than the center of the second side 212. That is, the end portion 2Ad is an end portion on the X1 side of the first substrate 2A, and the second end portion 22A indicated by a double-dashed line is arranged at a position closer to the Y1 side than the center line CL2 in the portion of the end portion 2Ad. The second terminal group 20 is provided at the second end portion 22A. As shown Figure 7 As shown, the second terminal group 20 includes a fifth terminal 201, a sixth terminal 202, a seventh terminal 203 and an eighth terminal 204. The fifth terminal 201, the sixth terminal 202, the seventh terminal 203 and the eighth terminal 204 are arranged in sequence in the front-to-back direction (Y direction) from the Y1 side to the Y2 side. These terminals 201, 202, 203, 204 have a pair of long sides 107 parallel to the first side 211 and a pair of short sides 108 parallel to the second side 212.

[0054] Next, the wiring of the first substrate 2A and the second substrate 3A will be described. It should be noted that the wiring is provided on the surface of the substrate, that is, the surface on which the wiring is provided is the front surface, and the surface on the opposite side of the front surface is the back surface.

[0055] like Figure 7 As shown, wiring, liquid crystal drive electrodes and connecting parts are provided on the surface 2Aa of the first substrate 2A. It should be noted that the connecting part C1 of the first substrate 2A and the connecting part C3 of the second substrate 3A (see Figure 8 ) are electrically connected via a conductive column (not shown). Similarly, the connection portion C2 of the first substrate 2A and the connection portion C4 of the second substrate 3A (see Figure 8 ) are electrically connected via a common electrode (not shown) that can be conductive.

[0056] The first terminal 101 and the fifth terminal 201 are electrically connected via a wiring 241. A branch point 242 is provided in the middle of the wiring 241, and the wiring extends from the branch point 242 to the connection portion C1.

[0057] The second terminal 102 and the sixth terminal 202 are electrically connected via wirings 243 and 245. It should be noted that the wiring 243 is provided with a branch point 244, and the wiring 246 extends from the branch point 244 to an end 247.

[0058] The third terminal 103 and the seventh terminal 203 are electrically connected via the wiring 248. The fourth terminal 104 and the eighth terminal 204 are electrically connected via the wirings 249 and 251. The wiring 249 extends from the fourth terminal 104 toward the X2 side to the branch point 250. The wiring 251 extends from the branch point 250 to the eighth terminal 204. The wiring extends from the branch point 250 to the connection portion C2.

[0059] The plurality of liquid crystal drive electrodes 261 are connected to the wirings 243 and 246. The liquid crystal drive electrodes 261 extend linearly in the X direction. The liquid crystal drive electrodes 261 are arranged at equal intervals in the Y direction.

[0060] A plurality of liquid crystal drive electrodes 262 are connected to the wiring 248. The liquid crystal drive electrodes 262 extend linearly along the X direction. The liquid crystal drive electrodes 262 are arranged at equal intervals in the Y direction. It should be noted that the liquid crystal drive electrodes 261 and the liquid crystal drive electrodes 262 are alternately arranged in the Y direction.

[0061] like Figure 8 As shown, wiring, liquid crystal drive electrodes and connecting parts are provided on the surface 3Aa of the second substrate 3A. It should be noted that Figure 8 The center lines CL1 and CL2 shown are Figure 7 The center lines CL1 and CL2 shown correspond.

[0062] The connection portion C3 is connected to wirings 342 and 343 via a branch point 341 . The wiring 342 extends to an end 348 . The wiring 343 extends to an end 349 . The connection portion C4 is connected to wirings 345 and 346 via a branch point 344 . The wiring 346 extends to an end 347 .

[0063] The plurality of liquid crystal drive electrodes 361 are connected to the wirings 342 and 343. The liquid crystal drive electrodes 361 extend linearly in the Y direction. The liquid crystal drive electrodes 361 are arranged at equal intervals in the X direction.

[0064] A plurality of liquid crystal drive electrodes 362 are connected to the wiring 346. The liquid crystal drive electrodes 362 extend linearly along the Y direction. The liquid crystal drive electrodes 362 are arranged at equal intervals in the X direction. It should be noted that the liquid crystal drive electrodes 361 and the liquid crystal drive electrodes 362 are alternately arranged in the X direction.

[0065] Next, the cross-sectional structure of the liquid crystal panel 1 will be briefly described. Fig. 9 is along Figure 7 The cross-sectional view of the IX-IX line. Fig. 9 As shown, the liquid crystal panel 1 includes a first substrate 2A, a second substrate 3A, and a liquid crystal layer 4A. Fig. 9 As shown, the second substrate 3A is arranged on the surface side (Z1 side) of the first substrate 2A. A liquid crystal layer 4A is provided between the second substrate 3A and the first substrate 2A. That is, the surface 2Aa of the first substrate 2A and the surface 3Aa of the second substrate 3A are arranged in a manner opposite to each other with the liquid crystal layer 4A interposed therebetween. It should be noted that the reverse side of the surface 2Aa of the first substrate 2A is the back side 2Ab, and the reverse side of the surface 3Aa of the second substrate 3A is the back side 3Ab. In addition, as described above, since the area of ​​the second substrate 3A is smaller than that of the first substrate 2A, the third terminal 103 provided on the surface 2Aa of the first substrate 2A is exposed. It should be noted that the insulating layer is provided to prevent contact between two wirings, but in the liquid crystal panel 1 involved in this embodiment, there is no overlapping portion of the wirings on the first substrate 2A, so no insulating layer is provided.

[0066] Furthermore, if Fig. 9 As shown, the alignment film 610 is laminated on the two substrates and the electrodes. Specifically, the alignment film 610 is laminated on the surface 2Aa of the first substrate 2A, the upper surface of the liquid crystal drive electrodes 261, 262, and a part of the wiring 248. In addition, the alignment film 610 is laminated on the surface 3Aa of the second substrate 3A and the upper surface of the liquid crystal drive electrode 361. In addition, the first substrate 2A and the second substrate 3A are bonded by a sealant 600 surrounding the effective area, and the liquid crystal layer 4A is filled in the space formed by the sealant 600.

[0067] Next, the function of the liquid crystal panel 1 is briefly described. For example, by applying a voltage to the liquid crystal panel 1, Fig. 9 The orientation state of the liquid crystal molecules in the liquid crystal layer 4A shown in FIG. 4A changes, the distribution of the refractive index changes, and the transmitted light diffuses. Figure 7 In the embodiment, current flows through the liquid crystal drive electrodes 261 and 262 extending in the X direction to set a potential difference between the liquid crystal drive electrodes 261 and 262, thereby diffusing light in the Y direction. Figure 8 In the embodiment, current flows through the liquid crystal drive electrodes 361 and 362 extending in the Y direction and a potential difference is set between the liquid crystal drive electrodes 361 and 362, thereby diffusing light in the X direction. By setting a potential difference between the liquid crystal drive electrodes 261 and 262 and the liquid crystal drive electrodes 361 and 362, light is diffused in the X direction and the Y direction. It should be noted that by increasing or decreasing the potential difference between the liquid crystal drive electrode 261 and the liquid crystal drive electrode 262, the degree of diffusion of light in the Y direction can be changed. In addition, by increasing or decreasing the potential difference between the liquid crystal drive electrode 361 and the liquid crystal drive electrode 362, the degree of diffusion of light in the X direction can be changed.

[0068] As described above, the lighting device 100 involved in this embodiment includes a heat sink 6, an LED 4 arranged on the D1 side relative to the heat sink 6 and cooled by the heat sink 6, a reflector 3 arranged on the D1 side relative to the LED 4, and a first mounting component 130 for mounting the LED 4 and the reflector 3 on the heat sink 6.

[0069] As described above, when there are multiple mounting components for mounting components of the lighting device, it is conceivable to connect multiple other mounting components to a main mounting component, but in this case, the load is concentrated on one mounting component. That is, the load involved in all the mounting components is not averaged, and the load is concentrated on a specific mounting component, which requires increasing the rigidity of the specific mounting component, which is not preferred.

[0070] Here, in the present embodiment, the LED 4 and the reflector 3 are mounted on the heat sink 6 via the first mounting member 130. That is, the load of the LED 4 and the reflector 3 is not supported only by the first mounting member 130, but supported by both the first mounting member 130 and the heat sink 6. Specifically, the load of the LED 4 and the reflector 3 is input to the first mounting member 130, but since the first mounting member 130 is mounted on the heat sink 6, the load is borne by both the first mounting member 130 and the heat sink 6. Thus, in the case where there are a plurality of mounting members for mounting components of the lighting device 100, it is possible to suppress the load from being concentrated on a specific mounting member, and the rigidity of the first mounting member 130 can be set to be smaller.

[0071] The first mounting member 130 comprises: a long strip member 73 extending axially on the outside of the heat sink 6; a first retaining member 72 assembled on the outside of the long strip member 73; and a second retaining member 5 assembled on the D1 side of the long strip member 73 and arranged on the D1 side of the heat sink 6, and the LED 4 and the reflector 3 are mounted on the second retaining member 5.

[0072] In this way, the annular first holding member 72 and the long member 73 are arranged on the outer periphery of the heat sink 6. Therefore, compared with the case where the outer periphery of the heat sink 6 is covered with a cylindrical holding member, it is suppressed that the heat dissipation of the heat sink 6 is hindered. In addition, since the second holding member 5 is assembled to the long member 73, the LED 4 and the reflector 3 can be mounted on the heat sink 6 with a simple structure.

[0073] The LED 4 is sandwiched between the second holding member 5 and the heat sink 6. Therefore, the LED 4 can be mounted with a simple structure. In addition, the LED 4 can be brought into contact with the heat sink 6 with a simple structure.

[0074] The first mounting member 130 has a third holding member 71 disposed on the D2 side of the heat sink 6, and the elongated member 73 and the heat sink 6 are mounted on the third holding member 71. Thus, the third holding member 71 can fix the relative distance between the elongated member 73 and the heat sink 6 in the axial direction.

[0075] The heat sink 6 includes: a columnar main body 61 having a central axis AX extending in the axial direction; and a plurality of fins 62 extending radially outward and axially from the outer peripheral surface of the main body 61. The plurality of fins 62 include a first fin 62A having a first height from the outer peripheral surface of the main body 61 and a second fin 62B having a height lower than the first height from the outer peripheral surface of the main body 61. The elongated member 73 is arranged radially outward of the second fin 62B.

[0076] Since the long member 73 is arranged radially outside the second fin 62B having a short height in this manner, the outer diameter of the lighting device 100 can be reduced compared to a case where the long member 73 is arranged radially outside the first fin 62A.

[0077] The liquid crystal panel 1 is provided on the D1 side of the reflector 3 , and the liquid crystal panel 1 is mounted on the first holding member 72 of the first mounting member 130 via a holding frame (second mounting member) 2 .

[0078] This makes it easier to mount the liquid crystal panel 1 on the first mounting member 130. Since the mounting load of the LED 4, the reflector 3, and the liquid crystal panel 1 is distributed to both the first mounting member 130 and the heat sink 6, the rigidity of the first mounting member 130 and the second mounting member can be set to be smaller.

[0079] When the protrusion 724 is engaged with the first recess 732A, the distance between the LED 4 and the liquid crystal panel 1 along the axial direction is the first distance. When the protrusion 724 is engaged with the second recess 732B, the distance between the LED 4 and the liquid crystal panel 1 along the axial direction is the second distance. The first distance is greater than the second distance. In this way, if the first recess 732A is selected as the recess 732 for engaging the protrusion 724 of the first holding member 72, the distance between the LED 4 and the liquid crystal panel 1 can be increased, and if the second recess 732B is selected as the recess 732 for engaging the protrusion 724, the distance between the LED 4 and the liquid crystal panel 1 can be reduced.

[0080] A control substrate 8 for controlling the LED 4 and the liquid crystal panel 1 is disposed on the D2 side of the heat sink 6 , and the LED 4 and the control substrate 8 , as well as the liquid crystal panel 1 and the control substrate 8 , are electrically connected via an FPC 110 and a wiring 120 .

[0081] The LED 4 and the liquid crystal panel 1 are arranged on the D1 side relative to the heat sink 6. Therefore, if the control substrate 8 is arranged on the D1 side relative to the heat sink 6, for example, the control substrate 8 must be arranged radially outside the LED 4 or the liquid crystal panel 1, and the lighting device 100 may be enlarged. Therefore, by arranging the control substrate 8 on the opposite side of the LED 4 and the liquid crystal panel 1 across the heat sink 6, it is possible to suppress the enlargement of the lighting device 100.

[0082] Description of Reference Numerals

[0083] 1. Liquid crystal panel; 1A. optical element; 2. retaining frame (second mounting member); 2A. first substrate; 3. reflector (optical member); 3A. second substrate; 4. LED (light source); 4A. liquid crystal layer; 5. second retaining member (first mounting member); 6. heat sink; 7. base member (first mounting member); 8. control substrate; 10. first terminal group; 20. second terminal group; 21. main body; 62. fin; 71. third retaining member; 72. first retaining member; 73. long strip member; 100. lighting device; 110. FPC (wiring); 130. first mounting member; 732. recess.

Claims

1. A lighting device comprising: Heat sink; a light source, arranged at one side of the first direction relative to the heat sink and cooled by the heat sink; An optical component, arranged at one side of the first direction relative to the light source; as well as The first mounting member mounts the light source and the optical member on the heat sink.

2. The lighting device according to claim 1, wherein: The first mounting member has: A long strip member extending outside the heat sink toward a first direction and fixed at a relative position relative to the heat sink in the first direction; A first retaining member, mounted on the outer side of the elongated member; as well as The second holding member is assembled on one side of the long member in the first direction and is disposed on one side of the heat sink in the first direction, and the light source and the optical member are mounted on the second holding member.

3. The lighting device according to claim 2, wherein: The first mounting member has a third holding member disposed on the other side of the heat sink in the first direction, The long member and the heat sink are mounted on the third holding member.

4. The lighting device according to claim 2, wherein: An optical element is provided on one side of the optical member in the first direction, and the optical element is mounted on the first holding member of the first mounting member via a second mounting member.

5. The lighting device according to claim 4, wherein: The optical element includes a plurality of liquid crystal panels stacked in a first direction, Among the plurality of liquid crystal panels, the liquid crystal panels for p-wave polarization and the liquid crystal panels for s-wave polarization are alternately overlapped in the first direction.

6. The lighting device according to claim 4, wherein: A control substrate for controlling the light source and the optical element is disposed on the other side of the heat sink in the first direction. The light source and the control substrate, and the optical element and the control substrate are electrically connected via wiring.

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