JP5889680B2 - Lighting apparatus and method for controlling lighting apparatus - Google Patents

Description

  The present invention relates to a lighting fixture using a light emitting diode as a light source.

  2. Description of the Related Art In recent years, with the improvement of environmental awareness, attention has been focused on light-emitting diodes (hereinafter referred to as LEDs) that have a long lifetime and high light conversion efficiency as new light sources that replace incandescent bulbs and fluorescent lamps.

  For example, Patent Literature 1 discloses a lighting device and a lighting fixture that can emit a light bulb color as illumination light by providing a white LED element in combination with a red LED element. Since a general white LED element is a combination of a blue LED element and a yellow phosphor, a red component is insufficient, but by providing a red LED element, a light bulb color can be emitted.

  In this specification, an LED device that is not mounted up to its drive circuit is defined as an illumination device, and the illumination device, an illumination control unit that controls lighting of the illumination device, and these are arranged. A device provided with a fixture body is defined as a lighting fixture.

JP 2008-300124 A (released on December 11, 2008)

  However, in the lighting apparatus of Patent Document 1, when driving a lighting device including a red LED element, there is nothing about the light emission timings of the red LED element and the LED element of a color other than red (white LED element in Patent Document 1). Not considered. Therefore, the deterioration of the red LED element is accelerated, and the life of the red LED element becomes shorter than the life of the LED elements of other colors, so that the life of the lighting device may be shortened.

  The reason is that when a red LED element is used in combination with another color LED element, the red LED element receives light from the other color LED element and generates a back electromotive force. The LED element converts electric energy into light energy. However, when light is applied, it reversely converts light energy into electric energy and functions like a solar cell. A red LED element receives a light of purple, blue, green, yellow, and orange having wavelengths shorter than red and generates a back electromotive force. Not only the red color but also the LED element is driven in a state where a counter electromotive force is generated, so that a load larger than usual is applied and the element deterioration is accelerated.

  When such a red LED element is used in combination with the white LED element 6a, the red LED element 6c receives light from the white LED element 6a and is driven (lighted) in a state where a counter electromotive force is generated. The deterioration of the LED element 6c proceeds and eventually the lifetime of the lighting device is shortened.

  The blue LED element and the yellow phosphor, or the white LED element composed of the blue LED element and the red and green phosphors do not have such a problem of element degradation due to the back electromotive force. This is because a blue LED element that emits blue light having a shorter wavelength than red does not generate back electromotive force upon receiving light from the red LED element.

  The present invention provides a lighting fixture that can extend the life of the lighting device by suppressing deterioration of the red LED device in a lighting fixture including a lighting device that is a combination of a red LED element and another color LED element. The purpose is to do.

  In order to solve the above-described problem, a lighting fixture of the present invention includes a lighting device including a red LED element and a non-red LED element of a color other than red, and a lighting control unit that controls lighting of the lighting device. The lighting control unit controls the timing of supplying current to the red LED element and the non-red LED element so that the red LED element starts to be turned on while the non-red LED element is turned off. It is a feature.

  According to this, the illumination control unit controls the timing of supplying current to the red LED element and the non-red LED element, so that the red LED element starts to be lit while the non-red LED element is turned off. Therefore, lighting is not started in a state where the red LED element generates a counter electromotive force due to light emission of the non-red LED element, deterioration of the red LED element can be suppressed, and the life of the lighting device can be extended.

  Also, by shifting the lighting start timing between the red LED element and the non-red LED element, it is possible to effectively prevent the inrush current from flowing through the red LED element and the non-red LED element, and also by this Deterioration of the element can be suppressed and the lifetime of the lighting device can be extended.

  In the lighting fixture of the present invention, the illumination control unit further turns on the red LED element and the non-red LED element by PWM control, and each PWM pulse signal for driving the red LED element and the non-red LED element is non- A configuration in which the PWM pulse signal for driving the red LED element rises after the fall of the PWM pulse signal for driving the red LED element can also be adopted.

  When the LED element is turned on by PWM control, the LED element is turned on and off repeatedly for each pulse of the PWM pulse signal and is driven to blink. The lighting timing in the blinking drive is the rise of the pulse of the PWM pulse signal, and the extinguishing timing is the fall of the pulse of the PWM pulse signal. In the case of blinking drive, the number of times of lighting increases, and deterioration of the red LED elements is accelerated when lighting starts repeatedly in a state where the red LED elements generate counter electromotive force.

  According to the above configuration, since the PWM pulse signal for driving the red LED element is raised after the fall of the PWM pulse signal for driving the non-red LED element, even in the blinking drive, after the non-red LED element is turned off, Since the red LED element starts to light, deterioration of the red LED element can be effectively suppressed and the life of the lighting device can be extended.

  The non-red LED element can be, for example, a white LED element composed of a blue LED element and a yellow phosphor, or a light bulb color LED element composed of a blue LED element, a red phosphor and a green phosphor. Both the white LED element and the light bulb color LED element include a blue LED element. Since the wavelength of the blue light emitted from the blue LED element is short, the red LED element that receives the blue light generates a larger back electromotive force and easily deteriorates. By adopting the configuration of the present invention, it is possible to effectively suppress deterioration of the red LED element and extend the lifetime of the lighting device.

  According to the present invention, in a lighting fixture provided with a lighting device in which a red LED element and another color LED element are combined, a lighting fixture capable of suppressing the deterioration of the red LED element and extending the lifetime of the lighting device is provided. There is an effect that can be done.

It is a perspective view which shows the lighting fixture of embodiment of this invention. It is a top view which shows the light source board | substrate of the lighting fixture of embodiment of this invention. It is a block diagram which shows the structure of the lighting fixture of embodiment of this invention. It is explanatory drawing which shows the structure of the LED element light emission mechanism of the lighting fixture of embodiment of this invention. Each of the white LED element and the red LED element in a certain illumination mode in which the white LED element and the red LED element are combined and turned on, and the combined light is emitted as illumination light, which is implemented in the lighting apparatus of the embodiment of the present invention. It is a timing chart which shows a PWM pulse signal. Each of the white LED element and the red LED element in a certain illumination mode in which the white LED element and the red LED element are combined and turned on, and the combined light is emitted as illumination light, which is implemented in the lighting apparatus of the embodiment of the present invention. It is another timing chart which shows a PWM pulse signal.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall perspective view of the luminaire as seen from below. The luminaire 100 constitutes a ceiling light and is attached to the ceiling surface of the room. The luminaire 100 may be a luminaire attached to an indoor side wall.

  The luminaire 100 includes a substantially plate-like main body 1 having a circular shape fixed to an indoor ceiling surface located above and a remote controller (not shown), and illuminates a lower indoor floor surface. The main body 1 includes a light source substrate 2, a reflector 3, a frame 4, an illumination control unit 5, a diffusion lens (not shown), and a cover (not shown).

  The light source substrate 2 is formed in a rectangular shape in plan view, and is attached to the lower surface of the main body 1 via the frame 4 while standing upright or substantially perpendicular to the main body 1. On the surface of the light source substrate 2, a plurality of LED (Light Emitting Diode) elements (6a, 6b, 6c, see FIG. 2) are provided. In the following description, the white LED element 6a, the light bulb color LED element 6b, and the red LED element 6c may be collectively referred to as the LED element 6. The light source substrate 2 and the frame 4 constitute an illumination device.

  As shown in FIG. 1, the reflecting plate 3 is provided on the lower surface of the main body 1 and on the radially outer portion of the light source substrate 2. The reflector 3 reflects the light emitted from the LED element 6 toward the floor surface, and the reflected light irradiates the floor surface. Thereby, the illumination intensity of the whole floor surface is obtained.

  The frame 4 has a regular polygon (for example, a regular octagon in FIG. 1) or a substantially regular polygon centered on a central axis extending in the vertical direction of the main body 1. The light source substrate 2 is attached to each side of the regular octagon of the frame 4 so that the light emission direction of the LED elements 6 faces radially outward. The LED element 6 emits light radially outward with respect to the center of the main body 1, and the light is reflected by the reflector 3.

  The illumination control unit 5 has a control board (not shown) including a power circuit (see FIG. 3) and the like, and is arranged on the inner side in the radial direction of the frame 4. The illumination control unit 5 is connected to a power connector (not shown) provided at the central portion of the main body 1 in the radial direction, and receives power from an external power source through the power connector. And the illumination control part 5 supplies the electric power to the LED element 6, and makes the LED element 6 light-emit. The illumination control unit 5 controls lighting of the illumination device.

  Although not shown in FIG. 1 for the sake of convenience, the diffusing lens is attached to the front surface of the light emitting surface of the light source substrate 2. The diffusion lens uniformly diffuses the light emitted from the LED element 6. The cover has a circular shape that is substantially the same diameter as the outer diameter of the main body 1 and is fitted and held on the peripheral edge of the main body 1 to cover the entire lower surface of the main body 1. The cover further diffuses the light emitted from the LED element 6 and prevents a person from directly viewing the light.

  In this way, since the LED element 6 does not directly illuminate the floor surface in the lighting fixture 100, even when a person faces the ceiling and looks directly at the illumination, the light of the LED element 6 is difficult to be directly inserted into the human eye. The burden can be reduced.

  FIG. 2 shows a plan view of the light source substrate 2. On the light source substrate 2, a plurality of white LED elements (non-red LED elements) 6a, bulb-color LED elements (non-red LED elements) 6b, and red LED elements 6c are arranged, for example, in substantially horizontal rows. In the present embodiment, nine white LED elements 6 a, four light bulb color LED elements 6 b and three red LED elements 6 c are mounted on the light source substrate 2.

  The arrangement and interval of the LED elements 6 affect the uniformity of light emission to the reflector 3. When the light emission to the reflector 3 becomes non-uniform, illuminance unevenness or the like occurs, and the illumination quality of the lighting fixture 100 is degraded. In particular, when each LED element 6 emits light in a different color and performs toning with the combination thereof, non-uniform illuminance causes color unevenness and greatly affects the illumination quality of the luminaire 100. Therefore, when using the several LED element 6 which light-emits with a different color, the arrangement | positioning and space | interval become especially important.

  The white LED element 6a emits white light and includes a blue LED and a yellow phosphor. The light bulb color LED element 6b emits light in a light bulb color, and includes a blue LED, a green phosphor, and a red phosphor. More specifically, the light bulb color LED element 6b is a color belonging to a color matching range represented by a Magdam ellipse 5-step centered on a point (0.445, 0.408) on an xy chromaticity diagram determined by the International Lighting Commission Flashes on. The red LED element 6c emits red light. More specifically, the red LED element 6c emits light in a color having a maximum wavelength value of 575 nm to 780 nm.

  Here, the color of the light bulb color LED element 6b belongs to the same color range represented by the Magdam ellipse 5-step centered on the point (0.445, 0.408) on the xy chromaticity diagram as described above. And there is some variation. The color of the red LED element 6c also has a certain range with the maximum value of the wavelength being 575 nm to 780 nm as described above.

  For this reason, as shown in FIG. 2, a plurality of white LED elements 6a, a plurality of light bulb color LED elements 6b, and a plurality of red LED elements 6c can be mounted on the light source substrate 2 to suppress variation in coloring. A plurality of LED elements having different colors may be configured as one LED element.

  Next, a detailed configuration related to the control of the lighting apparatus 100 will be described with reference to FIGS. 3 and 4 in addition to FIG. 3 is a block diagram showing the configuration of the lighting fixture 100, and FIG. 4 is an explanatory diagram showing the configuration of the LED element light emitting mechanism of the lighting fixture 100. As shown in FIG.

  The illumination control unit 5 includes a power supply circuit 10 as shown in FIG. The power supply circuit 10 receives supply of electric power from an AC power supply (AC input, 100 V), converts it into a DC voltage, and supplies power to each part of the lighting fixture 100. In the present embodiment, the power supply circuit 10 is shown as supplying power to the control power supply circuit 14 and the light source substrate 2 as an example. However, the present invention is not limited to this and is also necessary for other parts. It is assumed that power is supplied.

In addition to the power supply circuit 10, the illumination control unit 5 includes a CPU (Central Processing Unit) 11;
A memory 12, a PWM (Pulse Width Modulation) control circuit 13, a control power supply circuit 14, and an input unit 15 are provided. As an example, the CPU 11, the memory 12, and the PWM control circuit 13 are configured by a microcomputer.

  CPU11 is connected with each part and instruct | indicates operation required in order to control the lighting fixture 100 whole. The CPU 11 is connected to a switch (not shown) wirelessly or by wire, and receives an instruction input in response to an operation of the switch at the input unit 15.

  The memory 12 stores various programs for controlling the lighting apparatus 100, initial values, and the like, and is also used as a working memory for the CPU 11.

  The PWM control circuit 13 generates a PWM pulse necessary for driving the LED element 6 in accordance with an instruction from the CPU 11.

  The control power supply circuit 14 adjusts the voltage of the power supplied from the power supply circuit 10 to supply it to the CPU 11.

  As described above, the light source substrate 2 is provided with the three types of LED elements 6 including the white LED element 6a, the bulb-colored LED element 6b, and the red LED element 6c, and an FET (Field for driving each LED element 6). Effect Transistor) switches 21, 22, and 23 are arranged.

  For convenience of explanation, FIG. 3 shows a white LED element 6a, a light bulb color LED element 6b, and a red LED element 6c, respectively. However, as shown in FIG. 2, the white LED element 6a and the light bulb color LED are drawn. A plurality of elements 6b and red LED elements 6c are provided. The FET switches 21, 22, and 23 may be in the PWM control circuit 13.

  Next, the details of the light emitting mechanism of the LED element 6 will be described. The CPU 11 instructs the PWM control circuit 13 to generate and output PWM pulse signals M1, M2, and M3 for emitting at least one of the white LED element 6a, the light bulb color LED element 6b, and the red LED element 6c.

  The white LED element 6 a, the light bulb color LED element 6 b and the red LED element 6 c are supplied with necessary power from the power supply circuit 10. FET switches 21, 22, and 23 are provided between the white LED element 6a, the light bulb color LED element 6b, the red LED element 6c, and the ground voltage GND, respectively.

  In response to the PWM pulse signals M1, M2, and M3, the FET switches 21, 22, and 23 are turned on and off, so that current is supplied to and cut off from the white LED element 6a, the light bulb color LED element 6b, and the red LED element 6c. The

  The PWM pulse signal M1 turns on the white LED element 6a, the PWM pulse signal M2 turns on the light bulb color LED element 6b, and the PWM pulse signal M3 turns on the red LED element 6c.

  Supply of current to the LED element 6 is started at the rising edge of the pulse, and supply of current to the LED element 6 is interrupted at the falling edge of the pulse. When current is supplied to the white LED element 6a, the light bulb color LED element 6b, and the red LED element 6c, each of these LED elements 6 emits light.

  In addition, color adjustment (color adjustment) is performed by the size of the overlapping region of the pulses in the PWM pulse signals M1, M2, and M3, and light control (light adjustment) is performed by changing the pulse voltage of the PWM pulse signals M1, M2, and M3. Adjustment of strength).

  As will be described in detail later, the CPU 11 causes the PWM control circuit 13 to illuminate the white LED element 6a and / or the light bulb color LED element 6b, which are non-red LED elements, and the red LED element 6c, and to combine them. In irradiating light as illumination light, the other LED element 6 and the red LED are turned on so that the red LED element 6c starts to be turned on while the other LED element 6 that generates the combined light is turned off. The control of the timing for supplying current to the element 6c is instructed.

  When the red LED element 6c generates combined light with the white LED element 6a, an instruction is given to start lighting of the red LED element 6c while the white LED element 6a is turned off. When generating the combined light with the light bulb color LED element 6b, an instruction is given to start turning on the red LED element 6c while the light bulb color LED element 6b is turned off. When the combined light is generated with both the white LED element 6a and the light bulb color LED element 6b, the red LED element 6c is turned on in a state where both the white LED element 6a and the light bulb color LED element 6b are turned off. Instruct.

  Thus, when the white LED element 6a and the red LED element 6c are turned on, the PWM control circuit 13 turns on the red LED element 6c after the fall of the PWM pulse signal M1 that turns on the white LED element 6a. PWM pulse signals M1 and M3 are generated in which the PWM pulse signal M3 rises.

  Similarly, when the PWM control circuit 13 turns on the light bulb color LED element 6b and the red LED element 6c in combination, the PWM control circuit 13 turns on the red LED element 6c after the fall of the PWM pulse signal M2 that turns on the light bulb color LED element 6b. PWM pulse signals M2 and M3 are generated in which the PWM pulse signal M3 to be lit up rises.

  Similarly, when the white LED element 6a and the light bulb color LED element 6b and the red LED element 6c are turned on, the PWM control circuit 13 turns on the PWM pulse signal M1 and the light bulb color LED element 6b that turn on the white LED element 6a. PWM pulse signals M1, M2, and M3 are generated in which the PWM pulse signal M3 for lighting the red LED element 6c rises after the PWM pulse signal M2 for lighting the LED falls.

  In addition, although the structure which light-emits the white LED element 6a, the light bulb color LED element 6b, and the red LED element 6c was demonstrated, it is the same also when the other LED element is provided with two or more.

  By the light emitting mechanism, each LED element 6 emits light with a light amount corresponding to an operation of a remote controller (not shown), and illumination lights of a plurality of illumination colors are emitted.

  For example, the luminaire 100 emits illumination light of a yellow-red illumination color or an orange-pink illumination color. Thereby, it is possible to make the parasympathetic nerve superior without disturbing the melatonin secretion of the user in the room. As a result, the lighting device 100 can improve sleep efficiency by shortening the sleep latency at bedtime and extending the sleeping time. In addition, the lighting device 100 can relax and heal at the time of a break or a gathering, and can reduce the accumulated feeling of fatigue. “Yellow red” and “orange pink” correspond to the light source colors defined by the JIS standard (JIS Z 8110).

  The lighting fixture 100 having the above configuration includes a plurality of lighting modes. And in the lighting fixture 100, a desired illumination mode is selected by a remote controller. Thereby, the CPU 11 instructs the PWM control circuit 13 so that the white LED element 6a, the light bulb color LED element 6b, and the red LED element 6c emit light with a predetermined intensity. The PWM control circuit 13 outputs PWM pulse signals M1, M2, and M3 according to an instruction from the CPU 11, and performs color adjustment so that the illumination color corresponds to each illumination mode.

  Next, using FIG. 5 and FIG. 6, the red LED element 6 c and the white LED element 6 a are lit in combination, and current is supplied to the LED element 6 in the illumination mode in which the combined light is emitted as illumination light. Timing control will be described. The same applies when the red LED element 6c and the light bulb color LED element 6b are combined in place of the white LED element 6a.

  The LED element 6 described below is turned on / off for each pulse of the LED element 6 that is driven to blink by PWM control between the start and end of irradiation of illumination light in the illumination mode selected by the operation of the remote controller. Means turning on (ON) and turning off (OFF). In order to distinguish it from lighting of the lighting device that is the start of illumination light irradiation and extinguishing of the lighting device that is the end of irradiation of the illumination light, it is expressed as off / off.

  FIG. 5 shows the PWM pulse signal M3 of the red LED element 6c and the PWM of the white LED element 6a in a certain illumination mode in which the white LED element 6a and the red LED element 6c are lit in combination and irradiated with the combined light as illumination light. It is a timing chart of pulse signal M1.

  As shown in FIG. 5, when both the white LED element 6a and the red LED element 6c are turned on, when the white LED element 6a and the red LED element 6c are turned on in combination, the PWM that lights the white LED element 6a is turned on. After the fall of the pulse signal M1, the PWM pulse signal M3 for lighting the red LED element 6c is set to rise.

  Thereby, the red LED element 6c is turned on in a state where the white LED element 6a is turned off, and the red LED element 6c is turned on in a state where a counter electromotive force is generated by the light emission of the white LED element 6a. No, the deterioration of the red LED element 6c can be suppressed, and the lifetime of the lighting device can be extended.

  Further, when the red LED element 6c and the white LED element 6a are turned on at the same time when the red LED element 6c and the white LED element 6a are turned on by one power supply circuit 10, the red LED element 6c and the white LED element 6a are turned on. The inrush current easily flows. Further, when an inrush current flows, the power supply circuit 10 is also loaded.

  As described above, by shifting the ON timing between the red LED element 6c and the white LED element 6a, it is possible to effectively avoid the inrush current flowing through the red LED element 6c and the white LED element 6a. Therefore, the deterioration of the LED element 6 can be suppressed.

The on-voltage of the pulse in the PWM pulse signals M1 and M2 determines the amount of current supplied to the white LED element 6a and the red LED element 6c. As the on-voltage of the pulse increases, a larger current is supplied to the white LED element 6a and the red LED element 6c. White LED element 6a and a red LED element 6c intensity adjustment of the light emitted from the (dimming) is carried out by changing the ON voltage _{V 1} of the pulse in the PWM pulse signal M1, M2. Incidentally, the waveform of FIG. 5, PWM pulse signals M1, M3 also pulsed on-state voltage is set to V ₁ of the full, a state without dimming.

  Further, color adjustment (dimming) in the combined light of the light generated from the white LED element 6a and the red LED element 6c is performed by overlapping each other's pulses in the PWM pulse signals M1 and M3 (the hatched area in FIG. 5). ) Is performed by changing the size. FIG. 5 shows a toned state in which an overlapping region is formed.

  The waveform of FIG. 5 illustrates signals having the same period and duty ratio as the PWM pulse signals M1 and M3. Therefore, the PWM pulse signal M1 for lighting the white LED element 6a falls after the falling of the PWM pulse signal M3 for lighting the red LED element 6c. However, when the PWM pulse signals M1 and M3 have different periods or duty ratios, the PWM pulse signal M1 may fall before the fall of the PWM pulse signal M3.

  The point is that the PWM pulse signal M3 for lighting the red LED element 6c should rise after the falling of the PWM pulse signal M1 for lighting the white LED element 6a (setting condition). However, when the red LED element 6c and the white LED element 6a or the bulb-color LED element 6b or both are turned on by PWM control and their combined light is emitted as illumination light, the above-mentioned setting conditions cannot be satisfied. Cases are also conceivable. Even in such a case, by setting the PWM pulse signals M1, M2, and M3 so as to satisfy the previous setting conditions as much as possible, the deterioration of the red LED element 6c can be suppressed as much as possible, and the life of the lighting device is extended. As a result, the life of the lighting apparatus 100 can be extended.

  On the other hand, FIG. 6 shows the PWM pulse signal M3 of the red LED element 6c and the white LED element in a certain illumination mode in which the white LED element 6a and the red LED element 6c are turned on and irradiated with the combined light as illumination light. 6a is another timing chart of the PWM pulse signal M1 of 6a. The waveform in FIG. 6 shows a state where both the color adjustment and the light adjustment are performed.

As shown in FIG. 6, the on-voltage of the PWM pulse signal M3 of the red LED element 6c is set to _{V 2,} the ON voltage of the PWM pulse signal M1 of the white LED elements 6a are also set to _{V 3.} Compared to FIG. 5 ON voltage was V _1, the intensity of light in the red LED element 6c and white LED element 6a is weakened.

  In the above description, the LED element 6 is driven to blink by PWM control, and the dimming and toning are performed in the PWM control. However, the driving method is not limited to this, and the dimming / A configuration in which toning is performed by a method of adjusting a current value may be used.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

  The present invention relates to a lighting fixture using a light emitting diode as a light source.

DESCRIPTION OF SYMBOLS 1 Main body 2 Light source board 3 Reflector 4 Frame 5 Illumination control part 6 LED element 6a White LED element 6b Light bulb color LED element 6c Red LED element 10 Power supply circuit 11 CPU
DESCRIPTION OF SYMBOLS 12 Memory 13 PWM control circuit 14 Control power supply circuit 15 Input part 21 FET switch 100 Lighting fixture

Claims (4)

An illumination device including a red LED element and a non-red LED element of a color other than red;
An illumination control unit that controls lighting of the illumination device;
When the lighting control unit at least partially overlaps the lighting period of the red LED element and the lighting period of the non-red LED element, lighting of the red LED element is started in a state where the non-red LED element is turned off. Thus, the timing which supplies an electric current to the said red LED element and a non-red LED element is controlled.   The illumination control unit lights the red LED element and the non-red LED element by PWM control, and each PWM pulse signal for driving the red LED element and the non-red LED element is a PWM pulse signal for driving the non-red LED element. The lighting apparatus according to claim 1, wherein the PWM pulse signal for driving the red LED element is set to rise after the fall. The non-red LED element is a white LED element including a blue LED element and a yellow phosphor or a light bulb color LED element including a blue LED element, a red phosphor and a green phosphor. Or the lighting fixture of 2. A control method for a lighting device including a red LED element and a non-red LED element of a color other than red,
When the lighting period of the red LED element and the lighting period of the non-red LED element are at least partially overlapped, the red LED is turned on so that the lighting of the red LED element is started while the non-red LED element is turned off. The control method of the illuminating device characterized by controlling the timing which supplies an electric current to an element and a non-red LED element .

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