JP6649998B2 - Lighting equipment - Google Patents

Description

  The present invention relates to a lighting device having a light source such as a light emitting diode, and more particularly to a lighting device having a bulb shape.

  In recent years, lighting devices using a light emitting diode (LED) as a light source have been developed for various applications, and replacement with a lighting device using a conventional light source such as an incandescent lamp or a fluorescent lamp is being performed. In addition, an illumination device including a sensor or the like for detecting a signal from a remote terminal such as a remote controller for adjusting a light source to a desired brightness or adjusting a lighting state has been developed.

  For example, a plurality of LEDs are arranged on a substantially donut-shaped LED substrate, a sensor is arranged at a substantially central position of an arrangement area of the arranged LEDs, and the LEDs are turned on and off according to the detection of the sensors. A lighting device that can be used has been disclosed (see Patent Document 1).

JP 2001-325810 A

  However, in the lighting fixture of Patent Document 1, the support plate on which the sensor is disposed is connected to the LED substrate, and the sensor is close to the LED. May occur.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a lighting device that can prevent deterioration or failure of a receiving unit that receives an external signal.

  The lighting device according to the present invention is a lighting device comprising: a light source unit; a receiving unit that receives an external signal; and a control unit that controls the light source unit according to a signal received by the receiving unit. The unit is provided so as to be thermally separated from the light source unit.

  In the present invention, the receiving section for receiving an external signal is provided thermally separated from the light source section. For example, the receiving unit and the light source unit can be physically separated so that heat from the light source unit does not conduct to the receiving unit. Further, even when the receiving unit and the light source unit are physically connected, the heat can be prevented from being transmitted to the receiving unit due to heat radiation while the heat is being transmitted from the light source to the receiving unit. As a result, it is possible to prevent deterioration and failure of the receiving unit.

  The lighting device according to the present invention is characterized in that the light source unit includes a circuit board and a light emitting diode mounted on the circuit board, and the receiving unit is provided separately from the circuit board. .

  In the present invention, the light source unit includes a circuit board and a light emitting diode mounted on the circuit board, and the receiving unit is provided separately from the circuit board. Thus, the heat generated by the light emitting diode does not conduct to the receiving unit via the circuit board, so that deterioration and failure of the receiving unit can be prevented.

  In the lighting device according to the present invention, the plurality of light emitting diodes are separated and mounted in a ring on one surface of the circuit board, and the circuit board has an opening substantially at the center of a region surrounded by each light emitting diode. And the receiving unit is provided near the opening.

  In the present invention, a plurality of light-emitting diodes are isolated and mounted in a ring on one surface of the circuit board, and the circuit board is provided with an opening substantially at the center of a region surrounded by each light-emitting diode, The receiving unit is provided near the opening. Accordingly, the receiving unit can be provided substantially at the center of the area where the light emitting diode is provided without being physically connected to the circuit board, so that the receiving unit can be provided on the light emitting surface of the light emitting diode, and the device can be downsized. Can be

  In the lighting device according to the present invention, the plurality of light emitting diodes are separated and mounted in a ring on one surface of the circuit board, and the circuit board has an opening substantially at the center of a region surrounded by each light emitting diode. The receiving unit is provided at a position separated from the opening along a direction intersecting the other surface of the circuit board.

  In the present invention, a plurality of light-emitting diodes are isolated and mounted in a ring on one surface of the circuit board, and the circuit board is provided with an opening substantially at the center of a region surrounded by each light-emitting diode, A receiving unit is provided at a position separated from the opening along a direction intersecting the other surface of the circuit board. Accordingly, the receiving unit can be provided substantially at the center of the area where the light emitting diode is provided without being physically connected to the circuit board, so that the receiving unit can be provided on the light emitting surface of the light emitting diode, and the device can be downsized. Can be

  The lighting device according to the present invention is characterized in that the receiving section receives an optical signal, and the opening includes a light guide member for guiding the optical signal to the receiving section.

  According to the present invention, the receiving unit is configured to receive an optical signal, and includes a light guide member for guiding the optical signal to the receiving unit in the opening. Accordingly, when transmitting an optical signal from the outside to the light emitting surface of the light emitting diode, the optical signal can be reliably guided to the receiving unit.

  According to the present invention, it is possible to prevent deterioration and failure of the receiving unit.

FIG. 2 is an external view of the lighting device according to the first embodiment. FIG. 2 is an exploded perspective view of a main part of the lighting device according to the first embodiment. FIG. 2 is a cross-sectional view of the lighting device according to the first embodiment. It is a top view which shows the structural example of the light emission surface of a light source module. FIG. 14 is a cross-sectional view of a main part of a light transmitting unit according to the second embodiment. FIG. 14 is a schematic diagram illustrating an installation example of a lighting device according to Embodiment 3. FIG. 14 is a cross-sectional view of a lighting device according to a fourth embodiment. FIG. 14 is a plan view illustrating a structural example of a light emitting surface of a light source module according to Embodiment 4. FIG. 14 is a block diagram illustrating a configuration of a power supply unit according to a fourth embodiment. FIG. 4 is an explanatory diagram illustrating an example of a signal received by a remote control light receiving unit. FIG. 3 is an explanatory diagram illustrating a relationship between a PWM frequency and a reach distance of a signal from a remote controller. FIG. 14 is an explanatory diagram illustrating an example of toning of the illumination device according to the fourth embodiment. FIG. 15 is an explanatory diagram illustrating an example of dimming of the lighting device according to Embodiment 4. FIG. 19 is an explanatory diagram illustrating another example of dimming of the lighting device of the fourth embodiment. FIG. 17 is a plan view illustrating a structural example of a light emitting surface of a light source module according to Embodiment 5. FIG. 19 is a cross-sectional view of a principal part showing an example of the arrangement of the remote control light receiving unit according to the fifth embodiment. FIG. 26 is a cross-sectional view of a principal part showing another example of the arrangement of the remote control light receiving units according to the fifth embodiment. FIG. 26 is a cross-sectional view of a principal part showing another example of the arrangement of the remote control light receiving units according to the fifth embodiment.

Embodiment 1
Hereinafter, the present invention will be described with reference to the drawings showing the embodiments. FIG. 1 is an external view of the lighting device 100 of the first embodiment, FIG. 2 is an exploded perspective view of a main part of the lighting device 100 of the first embodiment, and FIG. 3 is a cross section of the lighting device 100 of the first embodiment. FIG. As shown in FIG. 1, the lighting device 100 is an LED light bulb having a light bulb shape of 40 W, 60 W, or the like, and as a power supply connection portion for fitting into an external socket and electrically connecting to a commercial power supply in external appearance. The base 10, the heat dissipating part 13, the connecting body 11 connecting the base 10 and the heat dissipating part 13, the hollow substantially hemispherical translucent part 50, and the LED module described later are mounted and thermally connected to the heat dissipating part 13. Radiating plate 20 and the like.

  As shown in FIGS. 2 and 3, a light source module 40 in which an LED module 42 is mounted on the surface of a substrate 41 is attached to the heat sink 20 with screws 21. The heat generated by the light source module 40 is applied between the light source module 40 and the heat radiating plate 20 by applying a heat conductive sheet or a resin having high thermal conductivity to improve the heat conduction efficiency. The heat can be dissipated to the outside through the switch 13.

  The heat radiating portion 13 is made of, for example, a lightweight metal having a high thermal conductivity such as aluminum, and has a substantially cylindrical shape. Further, the heat radiating portion 13 has a plurality of heat radiating grooves on the outer peripheral surface of the cylinder, and heat transmitted from the light source module 40 to the heat radiating portion 13 is radiated from the outer peripheral surface to outside air using the heat radiating grooves. You. Note that a waterproof packing 19 made of synthetic rubber is provided between the heat radiating portion 13 and the heat radiating plate 20 so that moisture does not enter the inside.

  The heat radiating section 13 has a cavity formed therein, and a power supply section for supplying required power (voltage and current) to the LED module 42 of the light source module 40 via the wiring 22 inside the heat radiating section 13. 30, a housing unit 15 for housing the power supply unit 30, and the like. A power supply line 17 for supplying commercial power to the power supply unit 30 is provided between the power supply unit 30 and the base 10.

  A synthetic rubber waterproof ring member 12 is provided between the heat radiating section 13 and the connecting body 11 so that moisture does not enter the inside. The heat radiating section 13 and the connecting body 11 are fixed by screws 14. I have.

  As shown in FIG. 3, a high conductivity is provided around the power supply unit 30 housed in the housing unit 15 in order to efficiently conduct heat generated by the power supply unit 30 to the heat radiation unit 13 and the base 10. (For example, a polyurethane resin). The synthetic resin 25 preferably has high electrical insulation, low water permeability, and flame retardancy.

  The synthetic resin 25 fills the inside of the heat radiating section 13 in a state where the electric wiring inside the heat radiating section 13 is completed and the heat radiating section 13 and the base 10 are mechanically joined. The synthetic resin 25 is in a liquid state at the time of filling. After filling the synthetic resin 25, it is cured at a required temperature. The cured synthetic resin 25 adheres to the inner surface of the base 10 and also adheres to the inner surface of the heat radiating section 13. Thereby, invasion of moisture from the joint portion of the base 10 can be more reliably prevented.

In addition, since the synthetic resin 25 has high electrical insulation, it is possible to reliably prevent a short circuit due to dielectric breakdown between the heat radiating unit 13 and the charged unit of the power supply unit 30. Further, since the synthetic resin 25 has a high thermal conductivity, the heat generated in the power supply unit 30 is radiated not only from the heat radiating unit 13 but also from the base 10 thermally connected through the synthetic resin 25. Therefore, the temperature rise of the power supply unit 30 can be suppressed, and the reliability of the electric components used in the power supply unit 30 can be improved.

  The reflection plate 23 is attached to the light emitting surface side of the light source module 40 with the screw 21. The reflection plate 23 is provided with an insertion hole having substantially the same size as the size of the LED module 42 at a position corresponding to the position where the LED module 42 is arranged, and is mounted in a state where the LED module 42 is inserted through the insertion hole. It is supposed to be. The reflection plate 23 is not essential and can be omitted.

  The translucent section 50 is made of milky white glass and is fixed to the heat sink 20 with an adhesive. The translucent section 50 is not limited to glass, but may be made of a milky white polycarbonate resin or the like. When the light transmitting portion 50 is made of a polycarbonate resin, the light transmitting portion 50 can be screwed and locked to the heat radiating plate 20 by cutting a screw.

  A light diffusion member 50 a for diffusing light from the LED module 42 (light source module 40) is added to the light transmitting section 50. The light diffusing member 50a has, for example, a crystal structure, and its optical properties are, for example, those having a large refractive index, a small light absorbing ability, and a high light scattering ability. For example, a pigment having a crystal structure such as a phosphor can be added. The addition ratio of the light diffusion member 50a may be, for example, about several percent. As the phosphor, for example, 3Ca3 (PO4) 2 Ca (F, Cl) 2 SbMn can be used.

  Accordingly, when the LED module 42 having the property of surface light emission is used as the light source, even when the directivity of light of the LED module 42 is narrow, light emitted from the LED module 42 is transmitted through the light transmitting unit 50. Since the light is diffused by the light diffusion member 50a, the light distribution characteristics can be broadened with a simple configuration. When the light diffusion member 50a is a phosphor, a material that diffuses light and emits light when excited by the light may be used. The light diffusion member 50a itself emits light, so that the light distribution can be further expanded.

  Further, since the light transmitting portion 50 has a hollow substantially hemispherical shell, it is possible to provide a light bulb-type lighting device having a wide light distribution characteristic using the LED module 42 (light emitting diode).

  In particular, since the light transmitting portion 50 and the heat sink 20 are joined at a position where the diameter is slightly smaller than the maximum diameter of the light transmitting portion 50 of the substantially hemispherical shell, the light emitted from the LED module 42 transmits light. Since the light is transmitted from a portion of the surface of the portion 50 up to the maximum diameter from the joint between the light transmitting portion 50 and the heat radiating plate 20, the light is radiated along the direction from the heat radiating portion 13 toward the base 10. Further, the light distribution characteristics can be broadened.

  FIG. 4 is a plan view showing a structural example of the light emitting surface of the light source module 40. In the light source module 40, a plurality of LED modules 42 are disposed on a substantially circular substrate 41 made of an aluminum alloy or the like so as to be annularly separated by an appropriate length. In the example of FIG. 4, six LED modules 42 are provided. However, the number and arrangement of the LED modules 42 are not limited to the example of FIG. Thus, the number can be changed, or the arrangement can be made substantially rectangular, for example. Note that the substrate 41 may be a ceramic or the like.

  As the LED module 42, one having a required emission color can be used. For example, a white module can be used. Note that the emission color is not limited to white, but may be daylight white or light bulb color.

Embodiment 2
In the example of FIG. 3 described above, the light diffusing member 50a is added to the light transmitting portion 50. However, the present invention is not limited to this, and the light diffusing member may be applied.

  FIG. 5 is a cross-sectional view of a main part of the light transmitting unit 51 according to the second embodiment. The light transmitting portion 51 is made of milky white glass and fixed to the heat sink 20 by an adhesive, similarly to the light transmitting portion 50 of the first embodiment. The translucent section 51 is not limited to glass, but may be made of milky white polycarbonate resin or the like. When the light transmitting portion 50 is made of a polycarbonate resin, the light transmitting portion 50 can be screwed and locked to the heat radiating plate 20 by cutting a screw.

  The light diffusing member 52 is applied to the inner surface of the light transmitting unit 50 (for example, baking application or electrostatic application). In the case of baking, for example, a light diffusing material 52, which is a phosphor, is applied to the surface of the translucent portion 51, and the temperature is raised from room temperature to 100 ° C. for about 30 minutes and heated, and then, The coating is applied by heating at 150 ° C. for about 30 minutes. Further, the light diffusing member 52 has a crystal structure, for example, as in the first embodiment, and its optical properties are, for example, those having a large refractive index, a small light absorbing ability, and a high light scattering ability. I just need. The coating thickness of the light diffusion member 52 may be about 1 mm to 2 mm. If the thickness of the light diffusing member 52 is too large, it is difficult for light to pass therethrough. Therefore, by setting the thickness in the above range, the light can be transmitted and diffused. Accordingly, when the LED module 42 having the property of surface light emission is used as a light source, even when the directivity of light of the LED module 42 is narrow, light emitted from the LED module 42 is transmitted through the light transmitting unit 51. Since the light is diffused by the light diffusing member 52, the light distribution characteristics can be broadened with a simple configuration. Note that, depending on the material and composition of the light diffusing member 52, the coating thickness is not limited to the range of 1 mm to 2 mm, and may be, for example, about several tens of μm.

  In addition, in the example of FIG. 5, the light diffusion member 52 is applied to the inner surface of the light transmitting unit 50, but is not limited thereto, and may be applied to the outer surface of the light transmitting unit 50. Alternatively, the light transmitting unit 50 may be formed in a double structure, and the light transmitting unit 50 may be configured with a layer made of the light diffusing member 52 interposed therebetween.

Embodiment 3
In Embodiments 1 and 2 described above, lighting device 100 has an LED bulb structure having a specific emission color, but lighting device 100 may be provided with a dimming function. In the third embodiment, a dimmer (not shown) is interposed in a power supply line between a commercial power supply and the lighting device 100, and the brightness of illumination light of the lighting device 100 is adjusted by the dimmer. Can be configured.

  FIG. 6 is a schematic diagram illustrating an installation example of the lighting device 100 according to the third embodiment. The commercial power supply is provided with a dimmer 200, and a plurality of lighting devices 100 are connected to a power line on the output side of the dimmer 200. As described above, the lighting device 100 has a light bulb shape in which the LED module 42 is built in, so that the lighting device 100 can be replaced with an existing light bulb. In FIG. 6, by turning a light control knob (operation switch or the like) of the light control device 200, the lighting devices 100 installed in a wide range can be collectively light controlled. Further, a signal can be transmitted to the dimmer 200 to dimming the lighting device 100 using a remote controller for remote control. Note that the lighting device 100 may have a configuration in which the dimmer 200 is housed and housed in the housing 15 inside the heat radiating unit 13, similarly to the power supply unit 30.

  Next, a dimming method according to the third embodiment will be described. The dimmer 200 outputs an AC voltage whose phase has been controlled to each lighting device 100 according to the dimming degree (for example, 100% to 25%). In each lighting device 100, the phase angle of the input voltage is detected, and the LED module 42 is turned on with a light amount corresponding to the phase angle. For example, when the phase angle is small, the current flowing through the LED module 42 is increased, and as the phase angle increases, the current flowing through the LED module 42 is reduced, so that light control according to the phase angle is performed. be able to.

  The description of the same parts as those in the first and second embodiments (for example, the configuration shown in FIGS. 1 to 5) is omitted. In the lighting device 100 according to the fourth embodiment, since the dimming can be accurately performed even with respect to the AC voltage that is phase-controlled as described above, the lighting device 100 can be replaced with a dimmable bulb using existing phase control, or It can also be used in combination with existing bulbs.

Embodiment 4
Embodiment 1 has no dimming function, and Embodiment 2 has a configuration in which dimming is performed using an external dimmer. However, not only dimming but also dimming is performed using a remote control for remote operation. A configuration having a color (adjusting the emission color to a desired color) function may also be employed.

  FIG. 7 is a cross-sectional view of the lighting device 100 according to the fourth embodiment, and FIG. 8 is a plan view illustrating a structure example of a light emitting surface of the light source module 40 according to the fourth embodiment. The difference from the first to third embodiments is that LED modules 42 and 43 having different emission colors, a remote control light receiving unit 45 for receiving a signal from a remote terminal such as a remote control, and the like are provided. Hereinafter, the details of the fourth embodiment will be described.

  As shown in FIGS. 7 and 8, the light source module 40 is configured such that a plurality of LED modules 42 and 43 having different emission colors are alternately separated by a suitable length on a substantially circular substrate 41 made of an aluminum alloy or the like. I have. In the example of FIG. 8, three LED modules 42 and 43 are used, respectively. However, the number and arrangement of the LED modules 42 and 43 are not limited to the example of FIG. The number can be changed, the arrangement can be made substantially rectangular, and the like can be performed as appropriate. Note that the substrate 41 may be a ceramic or the like.

  The LED module 42 can emit white light, for example, and the LED module 43 can emit light of bulb color. Note that the emission color is not limited to these, and may be another color, for example, red, green, or blue.

  A remote control light receiving unit 45 is provided at the center of the substantially circular substrate 41. As shown in FIG. 8, in the bulb-type lighting device 100, a portion that can be visually recognized in a state where the lighting device 100 is attached to a lighting fixture or the like is substantially only the light transmitting portion 50. For example, in order for a user to perform a remote operation with a remote controller, the remote controller light receiving unit 45 needs to be provided in an area visually recognized as the light transmitting unit 50. By providing the LED modules 42 and 43 around the remote control light receiving section 45 so as to surround the remote control light receiving section 45, the lighting device 100 can be downsized.

  FIG. 9 is a block diagram illustrating a configuration of the power supply unit 30 according to the fourth embodiment. The power supply unit 30 includes a noise filter circuit 31 for removing noise entering from a commercial power supply or the like, a rectification circuit 32 for rectifying an AC voltage to convert it to a DC voltage, and a DC voltage output from the rectification circuit 32. A DC / DC converter 33 that converts the DC voltage into a DC voltage; a PWM control circuit 34 that controls the current supplied to the LED modules 42 and 43 by performing pulse width modulation on the DC voltage output from the DC / DC converter 33; A control microcomputer 35 for controlling the power supply unit 30; a current / voltage detection circuit 36 for detecting a current flowing in the LED module 42 and an applied voltage; and a current / voltage detecting the current flowing in the LED module 43 and the applied voltage. A detection circuit 37 and the like are provided.

The remote control light receiving unit 45 receives infrared rays from an infrared LED built in a remote control (not shown) operated by the user, extracts a signal transmitted from the remote control, and outputs the extracted signal to the control microcomputer 35. . Signals transmitted from the remote controller include, for example, turning on and off the light source, dimming (for example, 70%, 50%, 30%, etc.), and toning (for example, adjusting the emission color stepwise from white to bulb color). It is for doing.

  FIG. 10 is an explanatory diagram showing an example of a signal received by the remote control light receiving unit 45. FIG. 10A shows a signal transmitted from a remote controller on the signal transmission side, that is, a signal received by the remote control light receiving unit 45, and FIG. 10B shows an output state of the remote control light receiving unit 45. As shown in FIG. 10A, the signal transmitted from the remote controller has a carrier frequency of 38 kHz and a cycle of about 26 μs. Note that the carrier frequency is not limited to 38 kHz, and may be another frequency, for example, 40 kHz.

  On the remote control side, when the infrared LED is blinked repeatedly at a cycle of 26 μs for a predetermined time T, the remote control light-receiving unit 45 outputs a high-level (H) electric signal. On the remote control side, when the infrared LED is turned off for a predetermined time T, the remote control light receiving unit 45 outputs a low-level (L) electric signal.

  The control microcomputer 35 outputs a control signal for turning on / off, dimming, and toning the light source to the DC / DC converter 33 and the PWM control circuit 34 based on the signal output from the remote control light receiving unit 45. .

  Further, the control microcomputer 35 outputs a control signal for keeping the light source on at a predetermined light amount based on the detection results output from the current / voltage detection circuits 36 and 37, by the DC / DC converter 33 and the PWM control circuit 34. Output to

  The PWM control circuit 34 obtains a control signal output from the control microcomputer 35, and performs PWM control on each of the LED modules 42 and 43 according to the obtained control signal. A configuration in which a PWM control circuit is individually provided for each of the LED modules 42 and 43 may be employed.

  The PWM control circuit 34 performs the PWM control using an arbitrary PWM frequency within a range of, for example, 300 Hz to 3 kHz, which is a frequency band in which interference is difficult to occur with a carrier frequency (for example, 38 kHz) of a signal transmitted by the remote controller using infrared rays. It can be carried out. Hereinafter, the relationship between the PWM frequency and the carrier frequency of the signal received by the remote control light receiving unit 45 will be described.

  FIG. 11 is an explanatory diagram showing the relationship between the PWM frequency and the reach of the signal from the remote controller. In FIG. 11, the horizontal axis indicates the PWM frequency, and the vertical axis indicates the reach of the signal from the remote controller. The reaching distance is a distance between the remote control and the remote control light receiving unit 45 when a signal from the remote control can be reliably received, and is preferably 7 m or more in practical use.

  As can be seen from FIG. 11, if the PWM frequency is about 3 kHz or less, the reaching distance can be secured 7 m or more. If the PWM frequency is 200 kHz or more, the reaching distance can be secured at 7 m or more.

  However, when the PWM frequency is set to 300 Hz or less, the flicker of the light source becomes visible. Therefore, it is desirable that the PMW frequency be in the range of 300 Hz to 3 kHz. As described above, by separating the PWM frequency and the frequency (carrier frequency) of the signal for remote control into different bands, it is possible to suppress the signal for remote control from being affected by the lighting operation of the light source by the PWM control, Malfunction of remote operation can be prevented. In particular, by setting the PWM frequency to 300 Hz to 3 kHz, it is possible to prevent malfunction of remote control using infrared rays. Therefore, even if the remote control light receiving unit 45 is provided so as to receive an infrared signal for remote operation from the side from which light is emitted from the LED modules 42 and 43, a malfunction of the remote operation using infrared light may occur. Can be prevented.

  In addition, by providing the remote control light receiving unit 45 at substantially the center of the annularly arranged LED modules 42 and 43, the size of the lighting device can be reduced, and the signal for remote operation can be turned on by the PWM control. It is possible to suppress the influence of the operation and prevent a malfunction of the remote operation.

  Although the PWM frequency can be set to 200 kHz or more, the heat generation of a switching element such as an FET used in the PWM control circuit 34 may increase, and the above range of 300 Hz to 3 kHz is more preferable.

  Next, a method of toning the lighting device 100 according to the fourth embodiment will be described. FIG. 12 is an explanatory diagram illustrating an example of toning of the illumination device 100 according to the fourth embodiment. In FIG. 12, the horizontal axis indicates time, and the vertical axis indicates the current flowing through each of the LED modules 42 and 43. The LED module 42 is a white LED module, and the LED module 43 is a light bulb color LED module.

  When the control microcomputer 35 receives an operation to make the illumination color (the emission color of the entire lighting device 100) white via the remote control light receiving unit 45, as shown in FIG. (LED module 42) is turned on at a duty ratio of 100%, and the light bulb color LED module (LED module 43) is turned off.

  When the control microcomputer 35 receives an operation via the remote control light-receiving unit 45 to change the illumination color (the emission color of the entire lighting device 100) from white to slightly the bulb color side, the control microcomputer 35 shown in FIG. As shown in (2), the white LED module (LED module 42) is turned on at a duty ratio of 75%, and the light bulb color LED module (LED module 43) is turned on at a duty ratio of 25%. Here, the duty ratio is a ratio of a period during which a current flows to the LED module in one cycle. In this state, the illumination color becomes an intermediate color between white and neutral white.

  When the control microcomputer 35 receives an operation via the remote control light receiving unit 45 to set the illumination color (the emission color of the entire lighting device 100) to neutral white, as shown in FIG. The white LED module (LED module 42) is lit at a duty ratio of 50%, and the light bulb color LED module (LED module 43) is lit at a duty ratio of 50%. In this state, the illumination color becomes neutral white.

  When the control microcomputer 35 receives an operation via the remote control light receiving unit 45 to change the illumination color (the emission color of the entire lighting device 100) from the neutral white to the light bulb color slightly, the control microcomputer 35 performs the operation shown in FIG. ), The white LED module (LED module 42) is turned on at a duty ratio of 25%, and the light bulb color LED module (LED module 43) is turned on at a duty ratio of 75%. In this state, the illumination color becomes a color intermediate between the neutral white color and the bulb color.

  When the control microcomputer 35 receives an operation to change the illumination color (the emission color of the entire lighting device 100) to the bulb color via the remote control light receiving unit 45, as shown in FIG. The white LED module (LED module 42) is turned off, and the bulb color LED module (LED module 43) is turned on at a duty ratio of 100%. In this state, the illumination color becomes the bulb color.

In the example of FIG. 12, the control microcomputer 35 controls the LED modules 42 and 43 having different emission colors so that they do not light up at the same time (lighting time, that is, the ON time of the PWM control does not overlap). That is, the white LED module is turned off while the white LED module is lit, and the white LED module is turned off while the white LED module is lit. Thus, the emission color can be adjusted without changing the current supplied to the LED modules 42 and 43 to a predetermined value (current value supplied to the LED module of one emission color) or more.

  Further, by the PWM control, the illumination color can be changed to a desired emission color (color temperature) in a range of white, daylight color, bulb color and the like by changing the ratio of the lighting time of the LED module of each color. An optimal lighting environment can be realized according to the scene and the user's preference.

  Next, a dimming method of lighting device 100 of Embodiment 4 will be described. FIG. 13 is an explanatory diagram illustrating an example of dimming of the illumination device 100 according to the fourth embodiment. In FIG. 13, the horizontal axis indicates time, and the vertical axis indicates current flowing through each of the LED modules 42 and 43. The LED module 42 is a white LED module, and the LED module 43 is a light bulb color LED module.

  The control microcomputer 35 sets the illumination color to, for example, daylight white via the remote control light-receiving unit 45, and then receives an operation to set the brightness to all lights (100% dimming). As shown in a), the white LED module (LED module 42) is turned on at a duty ratio of 50%, and the light bulb color LED module (LED module 43) is turned on at a duty ratio of 50%. In this state, since the LED module of any color is lit over one cycle, the dimming is 100%.

  When the control microcomputer 35 receives an operation to slightly decrease the brightness, as shown in FIG. 13B, the control microcomputer 35 turns on the white LED module (LED module 42) at a duty ratio of 35%, The LED module (LED module 43) is turned on at a duty ratio of 35%. In this state, for one cycle, the LED module of any color is turned on and the period is 70%, so that the dimming is 70%.

  When the control microcomputer 35 receives an operation to further reduce the brightness, the control microcomputer 35 turns on the white LED module (LED module 42) at a duty ratio of 25% as shown in FIG. The LED module (LED module 43) is turned on at a duty ratio of 25%. In this state, for one cycle, the LED module of any color is turned on and the period is 50%, so that the dimming is 50%. The same applies to other emission colors.

  As described above, the control microcomputer 35 controls the length of the lighting time while performing the light control while keeping the ratio of the lighting time of each of the light sources having different emission colors constant. Thereby, the toning and the dimming can be performed at the same time, and a more optimal lighting environment can be realized according to the usage scene of the lighting device 100 and the preference of the user.

  FIG. 14 is an explanatory diagram illustrating another example of dimming of the illumination device 100 according to the fourth embodiment. In FIG. 14, the horizontal axis represents time, and the vertical axis represents current flowing through each of the LED modules 42 and 43. The LED module 42 is a white LED module, and the LED module 43 is a light bulb color LED module.

  The control microcomputer 35 sets the illumination color to, for example, daylight white via the remote control light receiving unit 45, and then receives an operation to set the brightness to all lights (100% dimming). As shown in a), a current of a predetermined value is supplied to the white LED module (LED module 42) and the bulb color LED module. In this state, dimming becomes 100%. The duty ratio is 50%, but is not limited to this.

  When the control microcomputer 35 receives an operation to slightly reduce the brightness, the control microcomputer 35 causes the white LED module (LED module 42) and the bulb color LED module (LED module 43) to flow as shown in FIG. The current is reduced below a predetermined value. In this state, since the current flowing through each LED module is 75% of the predetermined value, the dimming is 75%.

  When the control microcomputer 35 receives an operation to further reduce the brightness, the control microcomputer 35 causes the white LED module (LED module 42) and the bulb color LED module (LED module 43) to flow as shown in FIG. Reduce the current further. In this state, since the current flowing through each LED module is 50% of the predetermined value, the dimming is 50%. The same applies to other emission colors.

  As described above, the control microcomputer 35 performs light control by controlling the amount of current supplied during the lighting time while keeping the length of the lighting time of each of the LED modules 42 and 43 having different emission colors constant. As a result, toning and dimming can be performed at the same time, and a more optimal lighting environment can be realized according to the usage scene of the lighting device and the user's preference.

Embodiment 5
In the above-described fourth embodiment, the remote control light receiving unit 45 is provided on the surface of the board 41. Can be prevented.

  FIG. 15 is a plan view illustrating a structural example of a light emitting surface of the light source module 40 according to the fifth embodiment. FIG. The substrate 41 of the light source module 40 is provided with a circular hole 44 at the center, and a plurality of LED modules 42 and 43 having different emission colors are alternately formed on the substrate 41 in a ring-like manner. It is arranged in long isolation. The diameter of the hole 44 is larger than the size of the remote control light receiving section 45.

  The remote control light receiving section 45 is disposed substantially at the center of the hole 44 so as to be separated from the substrate 41. The remote control light receiving unit 45 is mounted on the heat sink 20 and provided on a substrate 46 separated from the substrate 41.

  As described above, the remote control light receiving section 45 for receiving an external signal is provided thermally separated from the LED modules 42 and 43, and the heat from the LED modules 42 and 43 is received by the remote control light receiving section. Heat conduction to the part 45 can be prevented. Further, even when the remote control light receiving section 45 and the LED modules 42 and 43 are physically connected, heat is conducted from the LED modules 42 and 43 to the remote control light receiving section 45 through the heat sink 20 therebetween. The heat can be prevented from being radiated on the way and transmitted to the remote control light receiving section 45. This can prevent the remote control light receiving section 45 from being deteriorated or broken.

  Further, since the remote control light receiving section 45 is provided separately from the board 41 on which the LED modules 42 and 43 are mounted, heat generated in the LED modules 42 and 43 is transferred to the remote control light receiving section 45 via the board 41. Conduction becomes difficult, and deterioration and failure of the remote control light receiving unit 45 can be prevented.

FIG. 17 is a cross-sectional view of a main part showing another example of the arrangement of the remote control light receiving unit 45 according to the fifth embodiment. In the example of FIG. 17, a plurality of LED modules 42 and 43 are alternately separated and mounted in a ring on one surface of a substrate 41, and the substrate 41 is located substantially at the center of a region surrounded by the LED modules 42 and 43. An opening 48 is provided and a separate substrate 46 physically separated from the substrate 41.
Is provided near the opening 48. Note that the substrate 46 is supported by an appropriate support material. Accordingly, the remote control light receiving unit 45 can be provided substantially at the center of the area where the LED modules 42 and 43 are provided without being physically connected to the board 41 on which the LED modules 42 and 43 are mounted. The remote control light receiving section 45 can be provided on the light emitting surface of the device 100, and the device can be downsized.

  When the remote control light receiving unit 45 is provided near the opening 48, the remote control light receiving unit 45 can be provided at a position surrounded by the inner peripheral surfaces of the substrate 41 and the heat radiating plate 20, or the plate surface of the substrate 41 and the heat radiating plate 20 can be provided. It may be provided at a position separated from the opening 48 toward the power supply unit 30 along the direction intersecting the direction. Thereby, the remote control light receiving unit 45 can be further separated from the LED modules 42 and 43 and the substrate 41, and the influence of heat can be reduced.

  FIG. 18 is a cross-sectional view of a main part showing another example of the arrangement of the remote control light receiving unit 45 according to the fifth embodiment. In the example of FIG. 18, a light guide member 47 for guiding infrared light from the remote controller to the remote controller light receiving unit 45 is provided. The light guide member 47 is made of glass or synthetic resin and has a substantially cylindrical shape. One side has a curved surface (spherical surface) that is convex toward the outside so as to receive light from a remote controller, and the other side. Has a curved surface that is concave toward the outside according to the shape of the remote control light receiving unit 45. Accordingly, when a signal (infrared light) is transmitted from the outside to the light transmitting portion 50 which is the light emitting surface of the lighting device 100, the signal can be reliably guided to the remote control light receiving portion 45. The other side of the light guide member 47 (the end face on the remote control light receiving section 45 side) is not limited to a concave curved surface, but may be a flat surface.

  As described above, according to the present invention, it is possible to prevent heat from the light source module from conducting to the remote control light receiving unit, so that deterioration and failure of the remote control light receiving unit can be prevented.

  In the above-described embodiment, the light-bulb-type lighting device has been described. However, the shape of the lighting device is not limited to the light-bulb type, and may be another shape. In addition, although the lighting device including the LED module as the light source has been described, the light source is not limited to the LED module, and may be another light source such as an organic EL as long as it is a light emitting element having surface light emission.

30 power supply section 40 light source module (light source section)
41 Board (circuit board)
42, 43 LED module (light emitting diode)
44 holes (opening)
45 Remote control receiver (receiver)
47 light guide member 48 opening (opening)

Claims (3)

A first substrate;
A second substrate provided separately from the first substrate;
A plurality of light emitting diodes annularly mounted on one surface of the first substrate;
A receiving unit provided on the second substrate;
A control unit that controls the light emitting diode based on a signal output from the receiving unit,
A heat radiating unit that radiates heat transmitted from the light emitting diode via the first substrate to the outside;
A support member for supporting the second substrate;
With
The second substrate and the support member are provided separately from the heat radiating unit,
The lighting device, wherein the receiving unit and the support member are provided in a region surrounded by each light emitting diode when viewed from a direction intersecting a plate surface of the first substrate.   The lighting device according to claim 1, wherein the first substrate has an opening in a region surrounded by each light emitting diode. The lighting device according to claim 2, wherein the second substrate is provided at a position separated from the opening along a direction intersecting a plate surface of the first substrate.