Illuminating device

Abstract

To provide an illuminating device which uses an electrostatic capacity switch.SOLUTION: In an illuminating device 100 which includes a light source 110, a reflector 120, an electrode part 131 and a control part 170, the reflector 120 and the electrode part 131 form a capacitor C and the control part 170 controls the light source 110 on the basis of electrostatic capacitance of the capacitor C.SELECTED DRAWING: Figure 5

Description

[Technical field]

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

[0002] A capacitance switch is a switch that uses a change in capacitance. For example, Patent Document 1 discloses a lighting device that uses this capacitance switch. In the lighting device disclosed in Patent Document 1, a transparent electrode is disposed on the inner surface of an illumination lens. The capacitance of a capacitor formed by this electrode and a human body (e.g., a finger) changes significantly when the human body touches the outer surface of the illumination lens. In the lighting device disclosed in Patent Document 1, a light source is controlled based on this change in capacitance. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2007-230450 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the lighting device disclosed in Patent Document 1, a transparent electrode is disposed on the inner surface of the lighting lens. Therefore, the light transmittance of the lighting lens of the lighting device disclosed in Patent Document 1 is lower than that of a normal lighting lens that does not have an electrode disposed thereon. As a result, when a light source with the same output is used, the luminous intensity of the lighting device disclosed in Patent Document 1 is lower than that of a lighting device using a normal lighting lens.

[0005] SUMMARY OF THE PRESENT EMBODIMENTS In view of the above, an object of the present invention is to provide a lighting device using a capacitance switch. [Means for solving the problem]

[0006] In order to solve the above problems, an illumination device according to one embodiment of the present invention is an illumination device having a light source, a reflector, an electrode unit, and a control unit, wherein the reflector and the electrode unit form a capacitor, and the control unit controls the light source based on the capacitance of the capacitor. Effect of the Invention

[0007] According to the present invention, it is possible to provide a lighting device using a capacitance switch. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 illustrates an illumination device 100 according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a diagram showing the lighting device 100 in an exploded state. [Diagram 3] FIG. 2 is a bottom view of the lighting device 100. [Figure 4] 4 is a cross-sectional view of the lighting device 100 taken along the line AA in FIG. 3. [Diagram 5] 1 is a diagram showing a capacitor C formed by a reflector 120 and an electrode portion 131 of a conductive member 130, and a control portion 170. FIG. [Figure 6] 1 is a diagram illustrating the relationship between a conductive material (conductive portion 123) disposed on the surface of a reflector 120 and an electrode portion 131 of a conductive member 130. FIG. [Figure 7] 1 is a diagram illustrating the relationship between a conductive material (conductive portion 123) disposed on the surface of a reflector 120 and an electrode portion 131 of a conductive member 130. FIG. [Figure 8] 1 is a diagram illustrating the relationship between a conductive material (conductive portion 123) disposed on the surface of a reflector 120 and an electrode portion 131 of a conductive member 130. FIG. [Figure 9] 13 is a diagram illustrating a state in which a user touches an inner surface 1211 of a funnel-shaped portion 121 of a reflector 120. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] <Certification device 100> FIG. 1 is a diagram showing a lighting device 100 according to an embodiment of the present invention. FIG. 2 is a diagram showing the lighting device 100 in an exploded state. FIG. 3 is a diagram showing the lighting device 100 as viewed from below, and FIG. 4 is a cross-sectional view of the lighting device 100 taken along the line AA in FIG. 3. In FIGS. 1-4, the upward direction is the Z direction, and two directions perpendicular to the Z direction and perpendicular to each other are the X direction and the Y direction. In FIG. 1, the lighting device 100 illuminates the direction opposite to the Z direction, that is, the downward direction. That is, in FIG. 1, the lighting direction of the lighting device 100 is the downward direction.

[0010] The lighting device 100 includes a light source 110, a reflector 120, and a conductive member 130. The lighting device 100 is, for example, a lighting device that illuminates the interior of a vehicle, and is installed on the ceiling of the vehicle.

[0011] The light source 110 is, for example, a light-emitting diode (LED) or a light bulb. The light source 110 is disposed on a substrate PB, for example, as shown in FIGS.

[0012] The reflector 120 reflects light from the light source 110. The light from the light source 110 is reflected, for example, by the reflector 120 in the direction of an illumination target. The reflector 120 has a funnel-shaped portion 121. The funnel-shaped portion 121 is, for example, a funnel-shaped portion, and the area of ​​a region surrounded by the inner surface of the funnel-shaped portion 121 decreases in the Z direction (first direction), for example, as shown in FIGS.

[0013] 4, the light source 110 is disposed above the reflector 120 (on the Z direction side), and the lens 140 is disposed between the light source 110 and the upper end (on the Z direction side) of the reflector 120. In this case, the lens 140 is disposed so as to cover the opening at the upper end of the funnel-shaped portion 121 of the reflector 120, and the light source 110 is disposed above this lens 140.

[0014] The reflector 120 has a conductive portion 123. The conductive portion 123 is, for example, a conductive material (for example, metal plating) arranged on the surface of the reflector 120. In this case, the main body of the reflector 120 is an insulator (for example, resin), and the conductive material is arranged on the surface of the main body of the reflector 120. The conductive material is arranged so as to cover at least the inner surface 1211 of the funnel-shaped portion 121 of the reflector 120. The inner surface 1211 of the funnel-shaped portion 121 of the reflector 120 is a portion that reflects light from the light source 110. Therefore, in this embodiment, the conductive material arranged on the surface of the reflector 120 is also a member that reflects light.

[0015] Fig. 5 is an enlarged view of the region indicated by B in Fig. 4. In the example shown in Fig. 5, the conductive material (conductive portion 123) is disposed on the surface of reflector 120 so as to cover the entire surface of reflector 120. In this case, the entire surface of reflector 120 is the conductive portion 123.

[0016] The entire reflector 120 may be made of a conductive material. In other words, the entire reflector 120 may be made of a conductive material. In this case, the entire surface of the reflector 120 is also the conductive portion 123.

[0017] In this embodiment, the inner surface 1211 of the funnel-shaped portion 121 of the reflector 120 is touchable by the user. Therefore, in this embodiment, when the user touches the inner surface 1211 of the funnel-shaped portion 121 of the reflector 120, the conductive portion 123 of the reflector 120 (the conductive material disposed on the surface of the reflector 120, or the conductive material forming the entire reflector 120) is grounded via the user's body.

[0018] The conductive member 130 is made of a conductive material, and has an electrode portion 131 and a connection portion 132 as shown in FIG.

[0019] The electrode portion 131 has a plate shape and faces the conductive portion 123 of the reflector 120 with an insulator sandwiched between them. Therefore, in the lighting device 100 according to this embodiment, the reflector 120 (conductive portion 123) and the electrode portion 131 of the conductive member 130 form a capacitor C, as shown in FIG.

[0020] The connection portion 132 connects the electrode portion 131 to a measurement circuit for measuring the capacitance of a capacitor C formed by the reflector 120 and the electrode portion 131 of the conductive member 130.

[0021] When the entire surface of the reflector 120 is covered with a conductive material (FIG. 5) or when the entire reflector 120 is made of a conductive material, the lighting device 100 may further include, for example, a bezel 160 that surrounds the reflector 120. In this case, the bezel 160 is an insulator (for example, resin), and the reflector 120 (conductive portion 123) and the electrode portion 131 of the conductive member 130 are arranged to sandwich the bezel 160, and the reflector 120 and the electrode portion 131 of the conductive member 130 form a capacitor C.

[0022] 5, the reflector 120 may further have an extension 122 extending from the funnel-shaped portion 121 (for example, an outer surface 1212 of the funnel-shaped portion 121) in addition to the funnel-shaped portion 121. The bezel 160 may be sandwiched between the extension 122 of the reflector 120 and the electrode portion 131 of the conductive member 130.

[0023] In this case, the conductive material only needs to cover at least the inner surface 1211 of the funnel-shaped portion 121 of the reflector 120 and the portion of the reflector 120 that comes into contact with the bezel 160 (one surface of the extension portion 122 of the reflector 120 in the example shown in FIG. 7), as shown in FIG. In this manner, the reflector 120 and the electrode portion 131 of the conductive member 130 form a capacitor C.

[0024] 8, the conductive material may not cover the outer surface 1212 of the funnel-shaped portion 121 of the reflector 120. Then, the electrode portion 131 of the conductive member 130 may be arranged so as to be in contact with the outer surface 1212 of the funnel-shaped portion 121 of the reflector 120, and the conductive material (conductive portion 123) arranged on the inner surface 1211 of the funnel-shaped portion 121 of the reflector 120 and the electrode portion 131 of the conductive member 130 may sandwich the main body (insulator) of the reflector 120 to form a capacitor C. In this manner, the reflector 120 and the electrode portion 131 of the conductive member 130 also form the capacitor C.

[0025] The lighting device 100 may further include a cover 150 that covers the substrate PB on which the light source 110 is arranged and the conductive member 130, as shown in FIGS.

[0026] 6, the lighting device 100 further includes a control unit 110 that measures the capacitance of a capacitor C formed by the reflector 120 and the electrode portion 131 of the conductive member 130 and controls the light source 110 based on the measured capacitance. The control unit 170 includes, for example, a measurement circuit that measures the capacitance of the capacitor C formed by the reflector 120 and the electrode portion 131 of the conductive member 130, and a control circuit that controls the light source 110 based on the measured capacitance. The control unit 170 is installed, for example, on a substrate PB on which the light source 110 is installed.

[0027] In the lighting device 100 according to this embodiment, the inner surface 1211 of the funnel-shaped portion 121 of the reflector 120 can be touched by a user. In the lighting device 100 according to this embodiment, a conductive material (conductive portion 123) is disposed on the surface of the inner surface 1211 of the funnel-shaped portion 121 of the reflector 120. Therefore, in this embodiment, when the user touches the inner surface 1211 of the funnel-shaped portion 121 of the reflector 120, the conductive material (conductive portion 123) is grounded as shown in FIG. 9. Therefore, in this embodiment, when the user touches the inner surface 1211 of the funnel-shaped portion 121 of the reflector 120, the capacitor C formed by the reflector 120 and the electrode portion 131 of the conductive member 130 changes from a state in which the reflector 120 (conductive portion 123) is floating as shown in FIG. 6 to a state in which the reflector 120 (conductive portion 123) is grounded as shown in FIG. 9. As a result, in this embodiment, when a user touches the inner surface 1211 of the funnel-shaped portion 121 of the reflector 120, the capacitance of the capacitor C formed by the reflector 120 and the electrode portion 131 of the conductive member 130 changes significantly.

[0028] Therefore, for example, when the light source 110 is off (i.e., when the light source 110 is turned off), if the capacitance value of the capacitor C formed by the reflector 120 and the electrode portion 131 of the conductive member 130 changes from a value less than the first capacitance value to a value equal to or greater than the first capacitance value, the control unit 170 turns on the light source 110 (i.e., turns on the light source 110), and when the light source 110 is on (i.e., when the light source 110 is turned on), if the capacitance value of the capacitor C formed by the reflector 120 and the electrode portion 131 of the conductive member 130 changes from a value less than the second capacitance value to a value equal to or greater than the second capacitance value, the control unit 170 turns off the light source 110 (i.e., turns off the light source 110). The first capacitance value and the second capacitance value are appropriately set so that the light source 110 is switched on / off when the user touches the inner surface 1211 of the funnel-shaped portion 121 of the reflector 120. The first capacitance value and the second capacitance value may be the same value or may be different values.

[0029] As described above, in this embodiment, it is possible to provide a lighting device using a capacitance switch, which is a switch that uses a change in capacitance. In particular, in this embodiment, the entire inner surface 1211 of the funnel-shaped portion 121 of the reflector 120 becomes the operation part of the switch. Therefore, in this embodiment, the area of ​​the operation part of the switch is widened, and it is possible to provide a lighting device using a capacitance switch with high operability.

[0030] Moreover, in this embodiment, unlike the lighting device disclosed in Patent Document 1, the electrodes forming a capacitor are not disposed on the inner surface of lens 140. Therefore, in this embodiment, unlike the lighting device disclosed in Patent Document 1, the light transmittance of lens 140 does not decrease.

[0031] 5, the reflector 120 has an extension 122 extending from the funnel-shaped portion 131 in addition to the funnel-shaped portion 121, and a capacitor C is formed by a conductive material (conductive portion 123) arranged on the surface of the extension 122 of the reflector 120 and the electrode portion 131 of the conductive member 130, thereby eliminating restrictions on the shape of the inner surface 1211 of the funnel-shaped portion 121 of the reflector 120. As a result, in the present embodiment, it becomes possible to appropriately change the shape of the inner surface 1211 of the funnel-shaped portion 121 of the reflector 120. In this embodiment, for example, the inner surface 1211 of the funnel-shaped portion 121 of the reflector 120 is embossed, making it possible to display a message on the inner surface 1211 of the funnel-shaped portion 121 of the reflector 120 (for example, a message indicating that the inner surface 1211 of the funnel-shaped portion 121 of the reflector 120 is the location where the switch of the lighting device 100 is operated).

[0032] The present invention has been described above in terms of preferred embodiments thereof. Although the present invention has been described herein with reference to specific examples, various modifications and variations can be made to these examples without departing from the spirit and scope of the present invention as set forth in the claims. [Explanation of symbols]

[0033] 100 Lighting Equipment 110 Light source 120 Reflector 121 Funnel shaped part 1211 Inner surface of funnel-shaped portion 121 1212 Outer surface of funnel-shaped portion 121 122 Extension 123 Conductive parts (conductive materials) 130 Conductive materials 131 Electrode section 132 Connection 140 Lens 150 Cover 160 Bezel 170 Control section

Claims

1. A lighting device having a light source, a reflector, an electrode unit, and a control unit, the reflector and the electrode portion form a capacitor, The control unit controls the light source based on the capacitance of the capacitor.

2. The body of the reflector is an insulator, The lighting device according to claim 1 , wherein a conductive material is disposed on a surface of the reflector body.

3. The reflector has a funnel-shaped portion that is a funnel shape, an inner surface of the funnel-shaped portion reflects light from the light source; The lighting device according to claim 2 , wherein the conductive material is disposed so as to cover an inner surface of the funnel-shaped portion.

4. the conductive material is disposed so as to cover the entire body of the reflector; The reflector and the electrode portion sandwich a bezel that surrounds the reflector, The lighting device of claim 3 , wherein the bezel is an insulator.

5. The lighting device according to claim 3 , wherein the conductive material disposed on the surface of the reflector and the electrode portion sandwich a body of the reflector to form the capacitor.

6. The entire reflector is made of a conductive material, The reflector and the electrode portion sandwich a bezel that surrounds the reflector, The lighting device of claim 1 , wherein the bezel is an insulator.

7. The lighting device according to claim 6 , wherein the reflector has a funnel-shaped portion that is funnel-shaped.

8. an area of ​​a region surrounded by an inner surface of the funnel-shaped portion of the reflector decreases in a first direction; The lighting device according to claim 3 , wherein the light source is disposed on a side of the funnel-shaped portion of the reflector facing the first direction.

9. The illumination device of claim 8 , further comprising a lens disposed between the light source and the reflector.

10. The control unit is turning on the light source if a capacitance value of the capacitor changes from a value less than a first capacitance value to a value equal to or greater than the first capacitance value while the light source is off; 2. The lighting device of claim 1, further comprising: turning off the light source if, when the light source is on, the capacitance value of the capacitor changes from a value less than a second capacitance value to a value equal to or greater than the second capacitance value.

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