JP5902008B2 - 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 red LED element may emit light earlier than the LED elements of other colors at the start of illumination light irradiation (for example, when the lighting switch of the lighting device is turned on), in which case the red light is visually recognized. End up. Since the red light is a color that makes an image of malfunction or danger warning, it may cause psychological stress.

  The same applies to the end of illumination light irradiation (for example, when the lighting switch of the lighting device is turned off), and the red LED element may extinguish later than the LED elements of other colors. Even in that case, red light is visually recognized, and there is a risk of applying the same stress as described above.

  An object of the present invention is to provide a lighting fixture that does not cause psychological stress in a lighting fixture including a lighting device that is a combination of a red LED element and another color LED element.

  In order to solve the above-described problem, the 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 an illumination control unit that controls lighting of the lighting device, The illumination control unit is configured such that when the illumination device starts irradiating illumination light, the red LED element emits light after the non-red LED element emits light, and when the illumination device finishes illuminating light irradiation, the non-red LED element emits light. The timing of supplying current to the red LED element and the non-red LED element is controlled so that the red LED element is extinguished before it is extinguished.

  According to the above configuration, the illumination control unit controls the timing of supplying current to the red LED element and the non-red LED element, so that when the illumination light starts, the red LED element is emitted after the non-red LED element emits light. At the end of irradiation with illumination light, the red LED element is extinguished before the non-red LED element is extinguished.

  Therefore, the red light emitted from the red LED element is visually recognized at the start and end of irradiation of the illumination light, thereby reliably inducing a situation in which psychological stress is caused by an image of a malfunction or danger alarm. Can be prevented.

  In the lighting fixture of the present invention, the non-red LED element is a white LED element composed of a blue LED element and a yellow phosphor, and the emission rising time constant of the yellow phosphor is the red LED element and the blue LED. It is longer than the light emission rise time constant of the element, and the illumination control unit starts supplying electric current to the blue LED element at the start of illumination light irradiation of the illumination device, and the yellow phosphor A configuration may also be adopted in which the supply of current to the red LED element is started before the light emission is fully increased. An LED element composed of a blue LED element and a yellow phosphor is a white LED that emits a so-called daylight color.

  According to the above configuration, at the start of illumination light illumination, the colors are mixed in the order of blue, red, and yellow, and the color of the illumination device changes in the order of blue, purple, and pink.

  Thereby, in addition to the effect of avoiding the stress due to the single emission of red light, the color change from blue to pink can be made natural due to the purple in between. In addition, the purple color makes the eyes beautiful and enhances the performance.

  In the lighting fixture of the present invention, the non-red LED element is a white LED element composed of a blue LED element and a yellow phosphor, and a light emission falling time constant of the yellow phosphor is the red LED element and the blue LED. It is longer than the light emission falling time constant of the LED element, and the illumination control unit stops the supply of current to the blue LED element at the end of irradiation of the illumination light of the illumination device, and the yellow It is also possible to adopt a configuration in which the supply of current to the red LED element is stopped before the light emission of the phosphor is completely reduced. An LED element composed of a blue LED element and a yellow phosphor is a white LED that emits a so-called daylight color.

  According to the above configuration, at the end of illumination light irradiation, the colors are reduced in the order of blue, red, and yellow, and the color of the illumination device changes in the order of pink, orange, and yellow, and is extinguished.

  Thereby, in addition to the effect of avoiding the stress due to the single emission of red light, the change in color from pink to yellow or green through to quenching can be made natural by inserting orange in between. In addition, the orange color makes the color beautiful and enhances the performance.

  In the lighting apparatus of the present invention, the non-red LED element is a light bulb color LED element including a blue LED element, a red phosphor, and a green phosphor, and at least a light emission rise time constant of the green phosphor is the red color. It is longer than the light emission rise time constant of the LED element and the blue LED element, and the illumination control unit starts supplying the current to the blue LED element at the start of irradiation of illumination light of the illumination device, and A configuration may be adopted in which supply of current to the red LED element is started before light emission of the green phosphor is fully increased. An LED element composed of a blue LED element, a red phosphor, and a green phosphor is a light bulb color LED element that emits a light bulb color.

  According to the above configuration, at the start of illumination light illumination, the colors are mixed in the order of blue, red, and green, and the color of the illumination device changes in the order of blue, purple, and pink.

  Thereby, in addition to the effect of avoiding the stress due to the single emission of red light, the color change from blue to pink can be made natural due to the purple in between. In addition, the purple color makes the eyes beautiful and enhances the performance.

  In the lighting fixture of the present invention, the non-red LED element is a light bulb color LED element composed of a blue LED element, a red phosphor, and a green phosphor, and at least a light emission falling time constant of the green phosphor is the above-mentioned It is longer than the light emission falling time constant of the red LED element and the blue LED element, and the illumination control unit has stopped supplying current to the blue LED element at the end of irradiation of illumination light of the illumination device. In addition, the supply of current to the red LED element may be stopped before the emission of the green phosphor is completely reduced.

  A white LED element composed of a blue LED element and a yellow phosphor is a white LED emitting a so-called daylight color. On the other hand, a white LED element composed of a blue LED element, a red phosphor, and a green phosphor is a light bulb color LED element that emits a light bulb color. An LED element composed of a blue LED element, a red phosphor, and a green phosphor is a light bulb color LED element that emits a light bulb color.

  According to the above configuration, at the end of irradiation of illumination light, the colors are reduced in the order of blue, red, and green, and the color of the illumination device changes in the order of pink, orange, and green and is extinguished.

  Thereby, in addition to the effect of avoiding the stress due to the single emission of red light, the change in color from pink to yellow or green through to quenching can be made natural by inserting orange in between. In addition, the orange color makes the color beautiful and enhances the performance.

  INDUSTRIAL APPLICABILITY The present invention has an effect that it is possible to provide a lighting fixture that does not cause psychological stress in a lighting fixture including a lighting device that is a combination of a red LED element and another color LED element.

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. Both (a) and (b) indicate the timing of turning on and off the white LED element and the red LED element in the 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. It is a timing chart which shows. (A) and (b) both turning on and off the light bulb color LED element and the red LED element in the illumination mode in which the light bulb color LED element and the red LED element are combined and turned on and the combined light is emitted as illumination light. It is a timing chart which shows a timing. (A) and (b) both turning on and off the light bulb color LED element and the red LED element in the illumination mode in which the light bulb color LED element and the red LED element are combined and turned on and the combined light is emitted as illumination light. It is a timing chart which shows another example of timing.

  In the lighting fixture of the present invention, when the illumination control unit starts irradiation of illumination light, the red LED element emits light after the non-red LED element emits light, and at the end of irradiation of the illumination light of the illumination device, the non-red LED element emits light. The timing of supplying current to the red LED element and the non-red LED element is controlled so that the red LED element is extinguished before the extinction.

  In the following, the illumination light is started when the lighting switch is turned on, and the illumination light is finished when the lighting switch is turned off. At the end of time / irradiation, turning on / off for each pulse when the red LED element and the non-red LED element are driven to blink by PWM control is also included.

  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 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.

  As will be described in detail later, the CPU 11 instructs the PWM control circuit 13 to turn on 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. When irradiating the combined light as illumination light, the timing of supplying current to the red LED element 6c and the white LED element 6a or the bulb-color LED element 6b or both is controlled as follows.

  That is, at the start of illumination light irradiation of the illumination device, the red LED element 6c emits light after the white LED element 6a and / or the light bulb color LED element 6b emits light, and at the end of illumination light illumination of the illumination device, the white LED The timing of supplying current to the LED element 6 is controlled so that the red LED element 6c is extinguished before the element 6a and / or the bulb-color LED element 6b is extinguished.

  Thereby, the PWM control circuit 13 starts supplying the current to the red LED element 6c after starting the supply of the current of the white LED element 6a and / or the light bulb color LED element 6b at the start of illumination light irradiation. PWM pulse signals M1, M2, and M3 that are started are generated and output. On the other hand, at the end of illumination light irradiation, after the supply of current to the red LED element 6c is stopped, the PWM pulse is such that the supply of current to the white LED element 6a and / or the light bulb color LED element 6b is stopped. Generate and output signals M1, M2, and M3.

  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 FIGS. 5 (a) (b) to 7 (a) (b), the red LED element 6c is lit in combination with the white LED element 6a and / or the light bulb color LED element 6b. Control of timing for supplying current to the LED element 6 in the illumination mode in which the combined light is emitted as illumination light will be described.

  The “lighting” of the LED element 6 used in the description of FIGS. 5A, 5B to 7A, 7B is an LED at the start of illumination light irradiation in the illumination mode selected by the operation of the remote controller. It means the start of supply of current to the element 6, and does not mean lighting at the time of turning on / off each pulse of the LED element 6 driven to blink by PWM control. Similarly, the “light-off” of the LED element 6 used in the description of FIGS. 5A, 5B to 7A, 7B is the end of illumination light irradiation in the illumination mode selected by the operation of the remote controller. This means that the supply of current to the LED element 6 is stopped (shut off), and does not mean that the LED element 6 that is driven to blink by PWM control is turned on / off for each pulse.

  5 (a) and 5 (b) respectively show the white LED element 6a and the red LED in the illumination mode in which the white LED element 6a and the red LED element 6c are combined and turned on and the combined light is emitted as illumination light. It is a timing chart which shows the lighting / extinguishing timing of the element 6c. 5 (a) and 5 (b), the white LED element 6a has a blue LED element in the red LED element 6c and the white LED element 6a having a light emission rise time constant and a light emission fall time constant of the yellow phosphor. The light emission rise time constant and the light emission fall time constant are longer. Since the light is a combined light of white light and red light, the illumination light is pink A with no orange.

  5A and 5B, at the start of irradiation, the white LED element 6a is turned on first, and then the red LED element 6c is turned on. By using such a lighting procedure, at the start of irradiation, it is possible to reliably prevent only red light that may cause a malfunction or danger warning from being viewed alone, and to give psychological stress. Can be prevented.

  5A and 5B, at the end of irradiation, the red LED element 6c is turned off with at least the afterglow of the white LED element 6a remaining. The afterglow of the white LED element 6a is light emitted from the yellow phosphor even when the blue LED is turned off. By using such a light-off procedure, even at the end of irradiation, it is possible to reliably prevent only red light that may cause an image of malfunction or danger warning from being seen alone, thereby giving psychological stress. Can be prevented.

  Next, this will be described by paying attention to a change in the color of the lighting device due to the difference between the on / off timings of FIGS. 5 (a) and 5 (b).

  In FIG. 5 (a), at the start of irradiation, the red LED element 6c is turned on before the light emission of the yellow phosphor in the white LED element 6a is fully increased. Therefore, the color that is mixed (added) in the order of blue, red, and yellow and seen through the cover is blue (light of the blue LED element) → purple (light of the blue LED element + light of the red LED element) → pink A It changes to (light of blue LED element + light of red LED element + light of yellow phosphor).

  On the other hand, in FIG. 5B, at the start of irradiation, the red LED element 6c is turned on after the light emission of the yellow phosphor in the white LED element 6a has completely increased. Therefore, the color that is mixed (added) in the order of blue, yellow, and red and seen through the cover is blue (light of the blue LED element) → white (light of the blue LED element + light of the yellow phosphor) → pink A It changes to (light of blue LED element + light of yellow phosphor + light of red LED element).

  5A is turned on / off and FIG. 5B is turned on / off, in the process of changing from blue to pink A at the start of irradiation, whether purple or white is sandwiched between them. There is a difference. When both are compared, the change from blue to pink A can be made more natural when the purple color shown in FIG. 5A is sandwiched between the white colors shown in FIG. 5B. In addition, the purple color makes the eyes beautiful and enhances the performance.

  Further, in FIG. 5A, at the end of irradiation, after the blue LED element in the white LED element 6a is turned off, the red LED element 6c is turned off before the light emission of the yellow phosphor is reduced. Therefore, the color that is reduced in order of blue, red, and yellow, and the color seen through the cover is pink A (light of blue LED element + light of red LED element + light of yellow phosphor) → orange (light of yellow phosphor) + Red LED element light) → yellow (yellow phosphor light) and then extinguished.

  On the other hand, in FIG. 5B, at the end of irradiation, the red LED element 6c is turned off and then the white LED element 6a is turned off. Therefore, the color that is reduced in the order of blue, red, and green and visible through the cover is pink A (blue LED element light + red LED element light + yellow phosphor light) → white (blue LED element light) (+ Light of yellow phosphor) → yellow (light of yellow phosphor) changes to quench.

  The lighting / extinguishing timing in FIG. 5 (a) and the lighting / extinguishing timing in FIG. 5 (b) sandwich an orange in the process until the pink A light changes to yellow and disappears at the end of irradiation. Or white color. When both are compared, the change from pink A to yellow can be made more natural when the orange color in FIG. 5A is sandwiched between the white colors in FIG. 5B. In addition, the orange color makes the color beautiful and directing.

  FIGS. 6 (a) and 6 (b) respectively show a light bulb color LED element 6b and a light bulb color LED element 6b in an illumination mode in which the light bulb color LED element 6b and the red LED element 6c are lit in combination and irradiated with the combined light as illumination light. It is a timing chart which shows the lighting / extinguishing timing of the red LED element 6c. In FIGS. 6A and 6B, as the light bulb color LED element 6b, the green phosphor and the red phosphor have substantially the same light emission rise time constant, and the light emission fall time constants of both the phosphors are substantially the same. Something is used. Further, the light emission rise time constant and the light emission fall time constant of the green phosphor and the red phosphor are longer than the light emission rise time constant and the light emission fall time constant of the blue LED in the red LED element 6c and the light bulb color LED element 6b. . Since it is the combined light of the light bulb color light and the red light, the illumination light becomes a pink B with a strong orange.

  Also in this case, in both FIG. 6A and FIG. 6B, the light bulb color LED element 6b is turned on first at the start of irradiation, and then the red LED element 6c is turned on. By using such a lighting procedure, at the start of irradiation, it is possible to reliably prevent only red light that may cause a malfunction or danger warning from being viewed alone, and to give psychological stress. Can be prevented.

  6A and 6B, at the end of the irradiation, the red LED element 6c is turned off with at least the afterglow of the light bulb color LED element 6b remaining. The afterglow of the light bulb color LED element 6b is light emitted from the green and red phosphors even when the blue LED is turned off. By using such a light-off procedure, even at the end of irradiation, it is possible to reliably prevent only red light that may cause an image of malfunction or danger warning from being seen alone, thereby giving psychological stress. Can be prevented.

  Next, this will be described by paying attention to a change in the color of the lighting device due to the difference between the on / off timings of FIGS. 6 (a) and 6 (b).

  In FIG. 6A, at the start of irradiation, the red LED element 6c is turned on before the light emission of the green and red phosphors in the light bulb color LED element 6b is fully increased. Therefore, the colors that are mixed (added) in the order of blue, red, and yellow and appear through the cover are blue (light of the blue LED element) → purple (light of the blue LED element + light of the red LED) → pink B ( The light of the blue LED element + the light of the red LED element + the light of the red and green phosphors).

  On the other hand, in FIG. 6B, at the start of irradiation, the red LED element 6c is turned on after the light emission of each of the green and red phosphors in the light bulb color LED element 6b has fully increased. Therefore, the color that is mixed (added) in the order of blue, yellow, and red and seen through the cover is blue (light of the blue LED element) → bulb color (light of the blue LED element + light of each phosphor of red and green) ) → Pink B (light of blue LED element + light of red and green phosphors + light of red LED).

  In the lighting / extinguishing timing of FIG. 6 (a) and the lighting / extinguishing timing of FIG. 6 (b), as in the case of FIG. 5 (a) and FIG. 6 (a) with a purple color in the process of changing to blue can make the change from blue to pink B more natural than in FIG. 6 (b). Can be high.

  Further, in FIG. 6A, at the end of irradiation, after the blue LED in the light bulb color LED element 6b is turned off, the red LED element 6c is turned off before the light emission of each of the red and green phosphors is reduced. Therefore, the color that is reduced in order of blue, red, and yellow, and the color seen through the cover is pink B (light of blue LED element + light of red LED element + light of red and green phosphors) → orange (red And green phosphor light + red LED element light) → yellow (red and green phosphor light).

  On the other hand, in FIG.6 (b), after completion | finish of irradiation, after turning off the red LED element 6c, the light bulb color LED element 6b is turned off. Therefore, the colors that are reduced in the order of red, blue, and yellow and appear through the cover are pink B (light of the blue LED element + light of the red LED element + light of the yellow phosphor) → bulb color (of the blue LED element) Light + light of red and green phosphors) → yellow (light of red and green phosphors) and quenching.

  In the lighting / extinguishing timing of FIG. 6 (a) and the lighting / extinguishing timing of FIG. 6 (b), as in the case of FIG. 5 (a) and FIG. In the process until the color changes to yellow and disappears, the change from pink B to yellow can be made more natural in the case of FIG. In addition, the orange color makes the color beautiful and directing.

  FIG. 7A and FIG. 7B are still other light bulbs in an illumination mode in which the light bulb color LED element 6b and the red LED element 6c are combined and turned on and the combined light is emitted as illumination light. It is a timing chart which shows the timing of lighting / extinguishing of the color LED element 6b and the red LED element 6c. 7 (a) and 7 (b), the light emission rise time constant and the light emission rise time constant of the red phosphor in the light bulb color LED element 6b are longer than those in FIGS. 6 (a) and 6 (b). It has been. In addition, since it is the synthetic | combination light of a light bulb color light and red light, illumination light turns into pink B with strong orangeness.

  Since the light emission rising time constant of the red phosphor is different from that in FIGS. 6A and 6B, at the start of irradiation, in FIG. 7A, the color changes from purple to pink B through a light pink color. In FIG. 7B, since red light emission is delayed, the color changes from cyan to pink B. Further, the emission time constant of the red phosphor is different from that in FIGS. 6A and 6B, and at the end of irradiation, in FIG. Also in FIG. 7B, the light is quenched through yellow and then weak red. In addition, since it is light emission by the afterglow of the red fluorescent substance of the light bulb color LED element 6b, it is very weak and does not give psychological stress.

  Examples of the phosphor light emission rise time constant and the light emission rise time constant in the white LED element 6a and the light bulb color LED element 6b, and the light emission rise time constant and the light emission rise time constant of the blue LED element and the red LED element 6c are given. Is as follows.

  For example, a red LED element 6c having a light emission rise time constant of several tens of nsec or less was selected, and a yellow or green phosphor used was an Eu2 + phosphor having a light emission rise time constant of about 0.1 μsec. A white LED element 6a and a light bulb color LED element 6b may be combined. The light emission rise time constant of the blue LED element is selected to be shorter than the light emission rise time constant of the yellow phosphor or the green phosphor. Further, in this case, a Mn4 + phosphor having a rising time constant of about 0.5 msec can also be used as the red phosphor in the light bulb color LED element 6b.

  In addition, a red LED element 6c having a falling time constant of several tens of nsec or less is selected, and a yellow phosphor or a green phosphor using a Eu2 + phosphor having a light emission falling time constant of about 1 μsec is used. The LED element 6a and the light bulb color LED element 6b may be combined. Combine with white LED. The light emission falling time constant of the blue LED element is selected to be shorter than the light emission falling time constant of the yellow phosphor or the green phosphor. In this case, a Mn4 + phosphor having a falling time constant of about 5 msec can also be used as the red phosphor in the light bulb color LED element 6b.

  In the white LED element 6a and the light bulb color LED element 6b, when the red LED element 6c is lit with the phosphors fully raised, the yellow phosphor of the white LED element 6a and the light bulb color LED element 6b As the green phosphor, it is desirable to use a Ce3 + phosphor having a short emission time constant of about 10 nsec. The light emission rise time constant of the blue LED element is also selected to be shorter than the light emission rise time constant of the yellow phosphor or the green phosphor.

  In the above description, the red LED element 6c and the non-red LED elements (6a, 6b) emit light so that the red light of the red LED element 6c is not visually recognized independently at the start and end of illumination light illumination. -Although the structure which controls the timing of quenching was illustrated, this invention is not limited to this.

  For example, even when the red LED element 6c and the non-red LED elements (6a, 6b) are driven to blink by PWM control, each pulse of the PWM pulse signal is prevented so that the blinking drive of the red LED element 6c is not visually recognized. In addition, it is possible to control the light emission / quenching timing of the red LED element 6c and the non-red LED elements (6a, 6b).

  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 can be used for a lighting apparatus 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 (8)

An illumination device including a red LED element and a non-red LED element, and a lighting control unit for controlling the lighting of the lighting device, the lighting control unit, the irradiation start of the illumination light of the illumination device, the non-red The red LED element emits light after the LED element emits light, and the red LED element is extinguished before the non-red LED element is extinguished at the end of irradiation of the illumination light of the illumination device. and wherein a lighting device for controlling a timing of supplying an electric current to each non-red LED element,
The non-red LED element is a white LED element, the white LED element is a blue LED element, and a yellow phosphor whose emission rise time constant is longer than each of the red LED element and the blue LED element. Including
The illumination control unit, at the start of irradiation of illumination light of the illumination device, after starting the supply of current to the blue LED element and before the light emission of the yellow phosphor is fully increased, A lighting fixture characterized by starting to supply current to a red LED element . An illumination device including a red LED element and a non-red LED element, and a lighting control unit for controlling the lighting of the lighting device, the lighting control unit, the irradiation start of the illumination light of the illumination device, the non-red The red LED element emits light after the LED element emits light, and the red LED element is extinguished before the non-red LED element is extinguished at the end of irradiation of the illumination light of the illumination device. and wherein a lighting device for controlling a timing of supplying an electric current to each non-red LED element,
The non-red LED element is a white LED element, the white LED element is a blue LED element, and a yellow phosphor whose emission rise time constant is longer than each of the red LED element and the blue LED element. Including
The illumination control unit is after the supply of current to the blue LED element is stopped at the end of irradiation of the illumination light of the illumination device, and before the emission of the yellow phosphor is completely reduced, The lighting fixture characterized by stopping the supply of current to the red LED element . An illumination device including a red LED element and a non-red LED element, and a lighting control unit for controlling the lighting of the lighting device, the lighting control unit, the irradiation start of the illumination light of the illumination device, the non-red The red LED element emits light after the LED element emits light, and the red LED element is extinguished before the non-red LED element is extinguished at the end of irradiation of the illumination light of the illumination device. and wherein a lighting device for controlling a timing of supplying an electric current to each non-red LED element,
The non-red LED element is a light bulb color LED element, and the light bulb color LED element includes a blue LED element, a red phosphor, and a light emission rise time constant of each of the red LED element and the blue LED element. A longer green phosphor,
The illumination control unit is configured to start the supply of current to the blue LED element at the start of irradiation of illumination light of the illumination device, and before the light emission of the green phosphor is fully increased, A lighting fixture characterized by starting to supply current to a red LED element . An illumination device including a red LED element and a non-red LED element, and a lighting control unit for controlling the lighting of the lighting device, the lighting control unit, the irradiation start of the illumination light of the illumination device, the non-red The red LED element emits light after the LED element emits light, and the red LED element is extinguished before the non-red LED element is extinguished at the end of irradiation of the illumination light of the illumination device. and wherein a lighting device for controlling a timing of supplying an electric current to each non-red LED element,
The non-red LED element is a light bulb color LED element, and the light bulb color LED element includes a blue LED element, a red phosphor, and a light emission rise time constant of each of the red LED element and the blue LED element. A longer green phosphor,
The illumination control unit is after the supply of current to the blue LED element is stopped at the end of irradiation of illumination light of the illumination device, and before the emission of the green phosphor is completely lowered, The lighting fixture characterized by stopping the supply of current to the red LED element . A red LED element and a white LED element, wherein the white LED element is a blue LED element, and a yellow phosphor whose emission rise time constant is longer than each of the red LED element and the blue LED element. A lighting device control method including:
At the start of irradiation of illumination light of the illuminating device, after starting the supply of current to the blue LED element and before the light emission of the yellow phosphor is fully increased, the current to the red LED element The red LED element is caused to emit light after the white LED element emits light, and current is supplied to each of the red LED element and the white LED element when irradiation of illumination light of the illumination device is completed. The timing control is performed, and the red LED element is extinguished before the white LED element is extinguished . A red LED element and a white LED element, wherein the white LED element is a blue LED element, and a yellow phosphor whose emission rise time constant is longer than each of the red LED element and the blue LED element. A lighting device control method including:
Controlling the timing of supplying current to each of the red LED element and the white LED element at the start of irradiation of the illumination light of the illumination apparatus, and causing the red LED element to emit light after the white LED element emits light; At the end of irradiation of the illumination light, after the supply of current to the blue LED element is stopped and before the light emission of the yellow phosphor is completely reduced, the current to the red LED element is reduced. The method of controlling an illuminating device, wherein the red LED element is extinguished before the white LED element is extinguished by stopping the supply. A red LED element and a light bulb color LED element, wherein the light bulb color LED element is a blue LED element, a red phosphor, and a light emission rise time constant from the light emission rise time constant of each of the red LED element and the blue LED element A control method of a lighting device including a long green phosphor,
At the start of irradiation of illumination light of the illuminating device, after starting the supply of current to the blue LED element and before the light emission of the green phosphor is fully increased, the current to the red LED element The red LED element is caused to emit light after the light bulb color LED element emits light, and at the end of illumination light irradiation of the lighting device, a current is supplied to each of the red LED element and the light bulb color LED element. A control method for an illuminating device, comprising: controlling a supply timing to quench the red LED element before the light bulb color LED element is quenched. A red LED element and a light bulb color LED element, wherein the light bulb color LED element is a blue LED element, a red phosphor, and a light emission rise time constant from the light emission rise time constant of each of the red LED element and the blue LED element A control method of a lighting device including a long green phosphor,
  At the start of illumination of the illumination light of the illuminating device, controlling the timing of supplying current to each of the red LED element and the light bulb color LED element, causing the red LED element to emit light after the light bulb color LED element emits light, At the end of irradiation of the illumination light of the illuminating device, after the supply of current to the blue LED element is stopped and before the light emission of the green phosphor is completely lowered, the red LED element is supplied to the red LED element. A method of controlling an illumination device, wherein the red LED element is extinguished before the light bulb color LED element is extinguished by stopping the supply of electric current.

Images