Lighting device

Abstract

To provide a lighting device that can simplify the configuration. [Solution] The lighting device 1 comprises a light source 5, a light guide 7 that guides light from the light source 5, a reflector 8 positioned in the middle of the light guide path of the light guide 7 and reflecting the light guided by the light guide 7 in a direction intersecting the light irradiation direction of the light source 5, and a panel 4 that is illuminated by the light reflected by the reflector 8. The reflector 8 also serves as an electrostatic electrode whose capacitance changes upon contact with or proximity of a human body in order to detect the operation of turning on the light source 5.

Description

Technical Field

[0001] The present invention relates to a lighting device.

Background Art

[0002] Conventionally, as disclosed in Patent Document 1, an indoor indirect lighting device that performs indirect lighting by guiding light from an LED light source to a reflector by a light guide rod and extracting the light reflected from the reflector from a light diffusing plate is well-known. The reflector is made of a microfoamed resin of, for example, any of PET resin, PC resin, and PMMA resin.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the case of Patent Document 1, a detection unit for detecting an operation for lighting the indirect lighting is required. However, if this detection unit is configured as an independent component, the number of components increases accordingly. Therefore, there has been an obstacle to simplifying the configuration of the lighting device that performs indirect lighting. In addition, simplification of the device configuration is also required for a lighting device that performs direct lighting.

Means for Solving the Problems

[0005] The lighting device that solves the above problems includes a light source for indirect lighting, a light guide that guides light from the light source, a reflection unit that is disposed in the middle of the light guide path of the light guide and reflects the light guided by the light guide in a direction intersecting the light irradiation direction of the light source, and a panel that is illuminated by the light reflected by the reflection unit. The reflection unit also serves as an electrostatic electrode whose capacitance changes due to contact or proximity of a human body, at least for detecting the lighting operation of the light source. [Effects of the Invention]

[0006] This invention can simplify the configuration of a lighting device. [Brief explanation of the drawing]

[0007] [Figure 1] This is a perspective view of a lighting device according to one embodiment. [Figure 2] This is a cross-sectional view taken along line II-II, as shown in Figure 1. [Figure 3] This is a perspective view of the disassembled lighting device. [Figure 4] This is an enlarged view of a portion of the cross-section of a lighting device. [Figure 5] This is a rear view of a portion of the body of the lighting device. [Figure 6] This is a top view showing the internal configuration of the lighting device. [Figure 7] This is an electrical diagram of the lighting system. [Figure 8] This is an explanatory diagram of indirect lighting in a lighting system. [Modes for carrying out the invention]

[0008] An embodiment of this disclosure is described below. (Lighting device 1) As shown in Figures 1 and 2, the lighting device 1 comprises a body portion 2 that houses the components of the lighting device 1, and a panel 4 that closes the opening 3 (see Figure 2) of the body portion 2. The lighting device 1, i.e., the body portion 2 and the panel 4, is formed in a substantially rectangular parallelepiped shape, for example, having a longitudinal direction and a transverse direction. The lighting device 1 is used, for example, in a vehicle. The on-board lighting device 1 is mounted, for example, on the inner surface of a vehicle door.

[0009] As shown in Figure 2, the lighting device 1 comprises a light source 5 (hereinafter referred to as the first light source 6) that emits indirect lighting light, a light guide 7 that guides the light from the first light source 6, and a reflector 8 that reflects the light guided by the light guide 7 in a direction intersecting the light irradiation direction of the first light source 6 (direction of arrow A1 in Figure 2) (direction of arrow A2 in Figure 2). The lighting device 1 illuminates the panel 4 by reflecting the light from the first light source 6 with the reflector 8, thereby causing the surface of the panel 4, which is the surface to be illuminated, to emit light.

[0010] The lighting device 1 creates an effect by illuminating the area around the inner surface of the vehicle door. In this example, the lighting provided by the lighting device 1 is preferably indirect lighting, for example, by indirectly illuminating the panel 4 with light from the first light source 6. In this way, the lighting device 1 performs ambient lighting inside the vehicle using light from the light source 5 (first light source 6) as indirect lighting.

[0011] (Decorative element 10) As shown in Figures 1 and 2, the lighting device 1 includes a decorative element 10 supported and positioned on the outside of the panel 4 by a light guide 7. The decorative element 10 is formed in the shape of a long plate. The decorative element 10 is positioned such that most of its area is located in the center of the panel 4. An annular frame portion 11 is provided around the decorative element 10. The frame portion 11 is fitted into a flange portion 12 (see Figure 2) formed on the periphery of the opening 3 of the body portion 2. The decorative element 10 and the frame portion 11 are preferably made of, for example, resin, and preferably of a light-shielding material. The decorative element 10 and the frame portion 11 are used as a bezel to decorate the lighting device 1.

[0012] (1st light source 6) As shown in Figures 2 and 3, the first light source 6 is housed inside the body portion 2. In this example, the first light source 6 is positioned in a first region 14 formed inside the body portion 2. The first region 14 is, for example, a region partitioned by a wall portion 15 erected inside the body portion 2. The wall portion 15 is formed in a shape that surrounds the first light source 6, and in this example, it is formed in a roughly U-shape when viewed from above (see Figure 3). In this way, the body portion 2 has a wall portion 15 that prevents light from the first light source 6 from leaking into other areas inside the body portion 2.

[0013] Multiple first light sources 6 are arranged along the longitudinal direction (X-axis direction in Figure 3) of the body portion 2, which is formed in a substantially rectangular parallelepiped shape. The multiple first light sources 6 are arranged at equal intervals along the longitudinal direction of the body portion 2. The aggregate of first light sources 6 is provided in a single row. The multiple first light sources 6 are mounted on a substrate 16 located inside the body portion 2. For example, LEDs are used for the multiple first light sources 6.

[0014] (Light Guide 7) As shown in Figures 2 and 3, the light guide 7 is formed in a substantially elongated plate shape, for example, having a longitudinal direction (X-axis direction in Figure 2) and a transverse longitudinal direction (Y-axis direction in Figure 2) in a plan view. The light guide 7 is made of, for example, glass or acrylic resin. As shown in Figure 2, the light guide 7 is positioned in the first region 14 of the body portion 2. The light guide 7 has a light guide body 18 that extends along the light irradiation direction of the first light source 6, and a support portion 19 that supports the decorative body 10 at the tip of the light guide 7. The light guide body 18 is erected from the base portion 20 toward the light irradiation direction. A recess 21 for housing the first light source 6 and the substrate 16 is formed on the back surface of the base portion 20.

[0015] The light guide 7 is provided with a reflector 22 that prevents the light guided by the light guide 7 from leaking to the outside of the light guide 7. The reflector 22 has a pair of first reflectors 22a and second reflectors 22b arranged opposite to each other. In the light guide main body 18, the first reflector 22a is disposed on one side surface, and in the light guide 7, the second reflector 22b is disposed on the other side surface. By being attached to the light guide main body 18, the first reflector 22a and the second reflector 22b are disposed inside the body portion 2 inside the panel 4.

[0016] (Reflection portion 8) As shown in FIGS. 2 to 4, the reflection portion 8 is disposed in the middle of the light guiding path of the light guide 7. Specifically, the reflection portion 8 is disposed between the light guide 7 and the decorative body 10. The reflection portion 8 is formed of, for example, a metal capable of reflecting the light of the first light source 6. Specifically, it is preferable that the reflection portion 8 is made of, for example, stainless steel. Note that the reflection portion 8 may be a member in which a metal layer is formed on the surface of a resin base material.

[0017] The reflection portion 8 also serves as an electrostatic electrode whose capacitance changes due to contact or proximity of a human body in order to at least detect the lighting operation of the first light source 6. Thus, the reflection portion 8 in this example serves as an electrostatic electrode-cum-reflection portion 24. The reflection portion 8 is disposed between the light guide 7 and the decorative body 10 and also serves as an electrostatic electrode that detects contact or proximity of a human body to the decorative body 10, thereby causing the decorative body 10 to function as an operation portion 25 for the lighting operation of the first light source 6.

[0018] As shown in FIGS. 3 and 4, the reflection portion 8 has, for example, an electrode body 26 formed in a shape that reflects the light of the first light source 6 in the crossing direction of the light irradiation direction (the direction of arrow A2 in FIG. 4). The electrode body 26 is formed in a shape having a longitudinal direction (the X-axis direction in FIG. 3) and a short-side direction (the Y-axis direction in FIG. 3) in plan view, for example, similar to the light guide 7. Further, the electrode body 26 is formed in a shape along a groove portion 28 formed on the upper surface of the support portion 19 of the light guide 7, for example. The groove portion 28 in this example is formed in a substantially V shape, for example.

[0019] The reflective portion 8 has a ground electrode 27 adjacent to the electrode body 26. The ground electrode 27 is formed in an annular shape surrounding the electrode body 26. Thus, the ground electrode 27 is positioned around the electrode body 26. The ground electrode 27 is made of the same material as the electrode body 26.

[0020] As shown in Figure 4, the electrode body 26 has a first inclined surface 29 that reflects light from the first light source 6, and a second inclined surface 30 that reflects light from the first light source 6 in the opposite direction to the first inclined surface 29. The first inclined surface 29 is formed in a sloping shape, for example, rising from the center of the electrode body 26 toward one side outward (the +Y axis direction in Figure 4) in the short direction of the electrode body 26 (the Y axis direction in Figure 4). The second inclined surface 30 is formed in a sloping shape, for example, rising from the center of the electrode body 26 toward the other side outward (the -Y axis direction in Figure 4) in the short direction of the electrode body 26 (the Y axis direction in Figure 4). Thus, the electrode body 26 is formed in a shape roughly resembling the letter V when viewed from the side.

[0021] As shown in Figure 5, the body portion 2 and the light guide 7 have holes 31 through which wiring (not shown) for electrical connection to the reflecting portion 8, which has an electrostatic electrode function, passes. In this example, the holes 31 include a first hole 31a formed in the body portion 2 and a second hole 31b formed in the light guide 7. The first hole 31a is formed to be larger than the second hole 31b. The second hole 31b is formed in a slit shape.

[0022] (Detailed shape of Light Guide 7) As shown in Figures 2 and 4, the support portion 19 is formed in a shape that protrudes from both sides of the light guide body 18 in the light reflection direction of the reflecting portion 8, specifically on both sides in the short direction of the light guide 7. Specifically, the support portion 19 has a first support portion 19a that extends in the light reflection direction of the first inclined portion 29, and a second support portion 19b that extends in the light reflection direction of the second inclined portion 30. The groove portion 28 is located between the first support portion 19a and the second support portion 19b. The support portion 19 supports the decorative body 10 at two locations, the first support portion 19a and the second support portion 19b.

[0023] As shown in Figure 4, if the width of the tip of the light guide body 18 in the direction intersecting the light irradiation direction of the first light source 6 (direction of arrow A1 in Figure 4) (direction of arrow A2 in Figure 4) is defined as the first width W1, and the sum of the widths of the first inclined surface 29 and the second inclined surface 30 in the direction intersecting the light irradiation direction of the first light source 6 (direction of arrow A1 in Figure 4) (direction of arrow A2 in Figure 4) is defined as the second width W2, then the first width W1 is formed to be greater than or equal to the second width W2.

[0024] (Panel 4) As shown in Figures 2 to 4, panel 4 has a slit 33 that accommodates a portion of the light guide 7. As shown in Figure 2, the support portion 19 of the light guide 7 is positioned to be exposed to the outside of panel 4 through the slit 33, along with the reflector portion 8 and the decorative body 10. As shown in Figure 3, the slit 33 is formed with one side open in the longitudinal direction (the X-axis direction in Figure 3). This allows the light guide body 18 of the light guide 7 to be assembled to panel 4 by being inserted into the slit 33 from the side. Panel 4 is made of a light-transmitting material.

[0025] The light from the first light source 6 is guided by the light guide 7 to the support portion 19 exposed from the panel 4, and is emitted from the reflector portion 8 located on the support portion 19 toward the panel 4, illuminating the surface of the panel 4. In this way, the panel 4 is indirectly illuminated by the light reflected by the reflector portion 8. It is preferable that at least a part of the panel 4 is made of, for example, recycled bamboo.

[0026] (Direct lighting) As shown in Figures 2, 3, and 6, the lighting device 1 includes a second light source 34 that emits light directly to the back of the panel 4 for illumination. The second light source 34 is arranged in multiple rows on both sides of the first light source 6. In this example, the second light source 34 is arranged in a total of four rows, two on each side. The second light source 34 is arranged along the longitudinal direction (X-axis direction in Figure 6) of the body portion 2, which is formed in a substantially rectangular parallelepiped shape. The multiple second light source 34s are mounted on a substrate 35 located inside the body portion 2 and are arranged at equal intervals. For example, LEDs are used for the multiple second light source 34s.

[0027] The second light source 34 is located in a second region 36 formed inside the body portion 2. In this example, the second region 36 is a roughly U-shaped region formed to surround the wall portion 15 that constitutes the first region 14. The second region 36 is the region enclosed by the wall portion 15 erected inside the body portion 2 and the outer wall 37 of the body portion 2. In this example, the second light source 34 is arranged in four rows in the width direction (Y-axis direction in Figure 6) of the body portion 2 within the second region 36.

[0028] (Electrical configuration of lighting device 1) As shown in Figure 7, the lighting device 1 includes a control unit 39 that controls the operation of the lighting device 1. The control unit 39 is composed of, for example, a processor, memory, signal input / output ports, etc. The processor is composed of, for example, a CPU (Central Processing Unit), an MPU (Micro Processing Unit), an ASIC (Application-Specific Integrated Circuit), etc.

[0029] The control unit 39 has a reflector 8 connected to its input side and a first light source 6 and a second light source 34 connected to its output side. The control unit 39 controls the driving of the first light source 6 and the second light source 34 based on the capacitance detected by the reflector 8 (electrostatic electrode and reflector 24). In this example, when the control unit 39 recognizes contact or approach of a human body to the decorative object 10 based on a change in the capacitance of the reflector 8 (electrostatic electrode and reflector 24), it turns on the first light source 6 to perform indirect lighting.

[0030] (Effect of the embodiment) Next, the operation of the lighting device 1 of this embodiment will be described. As shown in Figure 8, when performing indirect lighting with the lighting device 1, the decorative object 10 is touched with a finger or the like. When a person comes into contact with (including approaching) the decorative object 10, the capacitance of the reflector 8, which also serves as an electrostatic electrode, changes. When the control unit 39 detects that the capacitance of the reflector 8 has changed, it lights up the first light source 6. In this example, multiple first light sources 6 are lit. When lighting up multiple first light sources 6, all first light sources 6 may be lit simultaneously, or multiple first light sources 6 may be lit in a predetermined order and at predetermined time intervals to create an illumination display.

[0031] Light emitted from the first light source 6 is guided by the light guide 7 to the reflector 8. As the light emitted from the first light source 6 passes through the light guide body 18, it is reflected inward by the first reflector 22a and the second reflector 22b located on both sides, and guided towards the reflector 8. In other words, the light emitted from the first light source 6 is directed towards the reflector 8 without leaking outside the light guide 7 by the pair of reflectors 22.

[0032] Light that reaches the reflecting section 8 is bent at approximately a right angle by the reflecting section 8, and is directed toward the panel 4. The surface of the panel 4 is illuminated by the light reflected by the reflecting section 8. In other words, the panel 4 is indirectly illuminated by the light emitted from the first light source 6. In this way, indirect illumination by the light from the first light source 6 is performed. Note that in Figure 8, only the optical axis reflected by the first inclined surface 29 of the reflecting section 8 is shown, and the optical axis reflected by the second inclined surface 30 of the reflecting section 8 is omitted.

[0033] Furthermore, when the control unit 39 detects an operation to perform direct illumination, it turns on the second light source 34. The second light source 34 performs direct illumination by transmitting the emitted light through the panel 4, thereby illuminating the panel 4 itself from the back. Direct illumination may be, for example, illumination that turns on all of the second light sources 34, or illumination (illumination lighting) that switches the lighting of multiple second light sources 34 in a predetermined pattern.

[0034] Operation to perform direct lighting includes, for example, a long press of the decorative element 10, or a combination of operating the decorative element 10 in a predetermined sequence and at predetermined time intervals. Alternatively, operation to perform direct lighting may be detected by a switch or sensor when an operation is performed on a location other than the lighting device 1. Thus, the lighting device 1 can perform not only indirect lighting but also direct lighting.

[0035] In this example, since the reflective section 8 of the lighting device 1, which performs indirect lighting, is equipped with the function of an electrostatic electrode, there is no need to provide the reflective member and the electrostatic electrode member separately. As a result, the number of parts in the lighting device 1 can be kept low, making it possible to simplify the structure of the lighting device 1. In addition, the assembly work of the parts that was required when the reflective member and the electrostatic electrode member were separate is eliminated, so the manufacturing process can also be simplified. Furthermore, by reducing the number of parts, the cost of the device can also be kept low.

[0036] (Effects of the embodiment) According to the configuration of the above embodiment, the following effects can be obtained. (1) The lighting device 1 comprises a panel 4, a light source 5 (first light source 6), a light guide 7, and a reflector 8, and performs illumination with the light from the light source 5. The reflector 8 also serves as an electrostatic electrode whose capacitance changes upon contact with or proximity of a human body in order to detect the operation of turning on the light source 5. With this configuration, the reflector 8, which reflects the light from the light source 5 as illumination light, is also equipped with the function of an electrostatic electrode that detects the user's operation of touching or approaching the light source 5 with a human body in order to turn it on. Therefore, it is not necessary to provide the light reflection function and the electrostatic electrode function separately, and the number of parts can be reduced accordingly. Thus, the configuration of the lighting device 1 can be simplified.

[0037] (2) The reflective section 8 has an electrode body 26 formed in a shape that reflects the light from the light source 5 in a direction intersecting the direction of light irradiation. With this configuration, the electrode body 26, which is the main body of the reflective section 8, can sensitively detect contact or approach of a human body.

[0038] (3) The reflective section 8 has a ground electrode 27 adjacent to the electrode body 26. With this configuration, since the ground electrode 27 is provided on the electrostatic electrode that detects the human body, it is possible to generate a sufficient change in capacitance when a human body comes into contact with or approaches the electrostatic electrode. Therefore, it is possible to accurately detect user operations in which a human body comes into contact with or approaches the area around the reflective section 8 or the reflective section itself in order to light up the light source 5.

[0039] (4) The electrode body 26 has a first inclined surface 29 that reflects light from the light source 5, and a second inclined surface 30 that reflects light from the light source 5 in the opposite direction to the first inclined surface 29. With this configuration, it is possible to irradiate the electrode body 26 with indirect lighting from both sides, so that it can provide indirect lighting that illuminates a wide area.

[0040] (5) When the width of the tip of the light guide body 18 in a direction intersecting the light irradiation direction of the light source 5 is defined as the first width W1, and the sum of the widths of the first inclined surface 29 and the second inclined surface 30 in a direction intersecting the light irradiation direction of the light source 5 is defined as the second width W2, the first width W1 is formed to be greater than or equal to the second width W2. With this configuration, it is possible to efficiently reflect the light guided by the light guide 7 over almost the entire area of ​​the first inclined surface 29 and the second inclined surface 30. Therefore, it contributes to making the light of the indirect lighting sufficiently bright.

[0041] (6) The lighting device 1 includes a decorative body 10 that is supported by a light guide 7 and positioned on the outside of the panel 4. The reflector 8 is positioned between the light guide 7 and the decorative body 10 and also serves as an electrostatic electrode, thereby allowing the decorative body 10 to function as an operating unit 25 for turning on the light source 5. With this configuration, the decorative body 10 positioned on the outside of the panel 4 also serves as an operating unit 25 for turning on the indirect lighting. This further contributes to reducing the number of parts. This further contributes to simplifying the lighting device 1.

[0042] (7) The light guide 7 has a light guide body 18 that extends along the direction of light irradiation of the light source 5, and a support portion 19 that supports the decorative body 10 at the tip of the light guide body 18. The support portion 19 is formed in a shape that protrudes on both sides with the light guide body 18 in the center in the direction of light reflection of the reflector 8. With this configuration, the decorative body 10 can be firmly supported by the support portion 19 which is formed to be wide, so that the decorative body 10 is less likely to fall off.

[0043] (8) Panel 4 has a slit 33 in which a part of the light guide 7 is positioned. The support portion 19 of the light guide 7 is positioned to be exposed to the outside of panel 4 through the slit 33 together with the reflector portion 8 and the decorative body 10. With this configuration, the light guided by the light guide 7 and reflected by the reflector portion 8 is irradiated onto the surface of panel 4, making it possible to create indirect lighting that causes the surface of panel 4, which is the surface to be illuminated, to emit light. Therefore, for example, it is possible to perform indirect lighting that looks good according to the surface shape of panel 4.

[0044] (9) The lighting device 1 comprises a body portion 2 that houses at least a light source 5. The body portion 2 has a wall portion 15 that prevents light from the light source 5 from leaking into other areas inside the body portion 2. With this configuration, the amount of light required for indirect lighting is less likely to be lost, and thus a decrease in the brightness of the indirect lighting can be less likely to occur.

[0045] (10) The lighting device 1 comprises a first light source 6 as a light source 5 that emits light for indirect lighting, and a second light source 34 that emits light for direct lighting to the back of the panel 4. With this configuration, it is possible to perform not only indirect lighting but also direct lighting with a single lighting device 1, so the lighting device 1 can be made highly functional.

[0046] (Other embodiments) This embodiment can be implemented with the following modifications. This embodiment and the following modifications can be combined with each other to the extent that they do not contradict each other technically.

[0047] The indirect lighting may automatically turn off after a certain period of time has elapsed since it was turned on, or it may turn off again when the decorative element 10 (operating unit 25) is operated after it has been turned on. The light guide body 18 is not limited to a shape that widens along the light irradiation direction of the first light source 6. For example, the light guide body 18 may have a shape that has the same width along the light irradiation direction of the first light source 6.

[0048] The support portion 19 only needs to have a shape on which the reflective portion 8 and the decorative body 10 can be placed. The first light source 6 and the second light source 34 are not limited to being multiple; there may be only one.

[0049] The surface color of the reflective section 8 may be changed as appropriate depending on the color of the light to be illuminated. The shape of the electrode body 26 is not limited to a roughly V-shape; it may be changed to, for example, a roughly U-shape. The first inclined surface 29 and the second inclined surface 30 are not limited to being planar, but may also be curved.

[0050] The shape of the grounding electrode 27 is not limited to annular; it may be non-annular. In this case, the grounding electrode 27 may be, for example, a straight plate. In the reflective section 8 which has an electrostatic electrode function, the ground electrode 27 may be omitted.

[0051] • If the lighting device 1 has, for example, multiple indirect lighting assemblies, it may be possible to switch between indirect lighting as needed by selectively operating these assemblies. The light guide 7 and the reflector 8 are not limited to a shape that reflects light on both sides in the short direction, but may also be shaped to irradiate light on only one side in the short direction. In this case, the electrode body 26 only needs to have one of the first inclined surface 29 and the second inclined surface 30.

[0052] The indirect lighting components are not limited to being positioned in the center of the body 2 in the short direction, but may also be positioned at the ends of the body 2 in the short direction. • Panel 4 may be made from materials other than recycled bamboo.

[0053] • Indirect lighting may, for example, be lighting that illuminates the back surface of panel 4. • In the lighting device 1, the decorative element 10 may be omitted. In lighting device 1, the direct lighting function may be omitted. That is, lighting device 1 may be a device that performs only indirect lighting. Thus, the lighting provided by lighting device 1 may be either indirect lighting or direct lighting.

[0054] The wall portion 15 of the body portion 2 may be omitted if the lighting device 1 is used exclusively for indirect lighting. The lighting device 1 is not limited to being installed on the vehicle door; for example, it may be installed on the center console or the ceiling inside the vehicle.

[0055] • The lighting device 1 may be used not only on vehicles but also on other items. The control unit 39 may be composed of [1] one or more processors operating according to a computer program (software), or [2] a combination of such processors and one or more dedicated hardware circuits, such as application-specific integrated circuits (ASICs), that perform at least some of the various processes. The processor includes a CPU and memory such as RAM and ROM, and the memory stores program code or instructions configured to cause the CPU to perform the processes. The memory (computer-readable medium) includes any available medium that can be accessed by a general-purpose or dedicated computer. Alternatively, instead of a computer including the above-mentioned processor, a processing circuit composed of one or more dedicated hardware circuits that perform all of the various processes may be used.

[0056] This disclosure is described in accordance with the embodiments, but it is understood that this disclosure is not limited to such embodiments or structures. This disclosure also includes various modifications and variations within the scope of equivalence. In addition, various combinations and forms, as well as other combinations and forms that include only one, more, or less of those elements, fall within the scope and concept of this disclosure. [Explanation of Symbols]

[0057] 1...Lighting device, 2...Body part, 4...Panel, 5...Light source, 6...First light source, 7...Light guide, 8...Reflector part, 10...Decorative part, 15...Wall part, 18...Light guide main body, 19...Support part, 25...Operating part, 26...Electrode main body, 27...Ground electrode, 29...First inclined surface part, 30...Second inclined surface part, 33...Slit, 34...Second light source, W1...First width, W2...Second width.

Claims

1. The light source for indirect lighting, A light guide that guides light from the aforementioned light source, A reflective section is positioned in the middle of the light guide path of the light guide and reflects the light guided by the light guide in a direction intersecting the light irradiation direction of the light source, A lighting device comprising: a panel illuminated by light reflected by the reflective part; The lighting device wherein the reflective portion also serves as an electrostatic electrode whose capacitance changes upon contact with or proximity of a human body, in order to detect the operation of turning on the light source.

2. The lighting device according to claim 1, wherein the reflective portion has an electrode body formed in a shape that reflects light from the light source in a direction intersecting the light irradiation direction.

3. The lighting device according to claim 2, wherein the reflective portion has a ground electrode adjacent to the electrode body.

4. The lighting device according to claim 2, wherein the electrode body has a first inclined surface portion that reflects light from the light source and a second inclined surface portion that reflects light from the light source in the opposite direction to the first inclined surface portion.

5. The light guide has a light guide body that extends along the direction of light irradiation of the light source, The lighting device according to claim 4, wherein the width of the tip of the light guide body in a direction intersecting the light irradiation direction of the light source is defined as the first width, and the sum of the widths of the first and second inclined surfaces in a direction intersecting the light irradiation direction of the light source is defined as the second width, and the first width is formed to be greater than or equal to the second width.

6. The panel comprises a decorative element positioned on the outside of the panel, supported by the light guide, The lighting device according to claim 1, wherein the reflective portion is positioned between the light guide and the decorative body and also serves as the electrostatic electrode, thereby causing the decorative body to function as an operating unit for turning on the light source.

7. The light guide comprises a light guide body extending along the direction of light irradiation of the light source, and a support portion at the tip of the light guide body that supports the decorative object. The lighting device according to claim 6, wherein the support portion is formed in a shape that protrudes on both sides with the light guide body as the center in the light reflection direction of the reflecting portion.

8. The panel has a slit in which a portion of the light guide is positioned. The light guide has a light guide body extending along the direction of light irradiation of the light source, and a support portion at the tip of the light guide body that supports the decorative object. The lighting device according to claim 6, wherein the support portion is arranged together with the reflecting portion and the decorative body so as to be exposed to the outside of the panel through the slit.

9. It comprises at least a body section that houses the light source, The lighting device according to claim 1, wherein the body portion has a wall portion that prevents light from the light source from leaking into other areas inside the body portion.

10. A first light source, which emits light for indirect illumination, The lighting device according to claim 1, further comprising a second light source that emits light for illumination directly to the back of the panel.

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