JP2007200723A - Changeable-color led lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small changeable-color LED lighting system capable of simply changing emission color. <P>SOLUTION: This changeable-color LED lighting system A is provided with: three light emitting diodes LED (R), LED (G) and LED (B) having emission colors different from one another (the emission colors are R, G and B); a rotating base 5 having the respective light emitting diodes LED (R), LED (G) and LED (B) attached thereto and rotatably mounted to a lighting system body 4; an optical output setting part 17 for setting optical outputs of the respective light emitting diodes LED (R), LED (G) and LED (B) so that the optical outputs of the respective light emitting diodes LED (R), LED (G) and LED (B) are asynchronously changed in response to the rotation angle of the rotating base 5; and a lighting circuit part 18 for respectively lighting the respective light emitting diodes LED (R), LED (G) and LED (B) by the optical outputs set by the optical output setting part 17. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a variable color LED lighting device.

  In recent years, gardening has become more popular for seeking relaxation and moisture in private homes. From dusk to night, you can enjoy the lights of garden lights installed in gardens, etc. Small spotlights are provided as garden lights to appreciate the trees.

  Some of these small spotlights use light bulbs or light-emitting diodes as the light source, but the light emission color is mainly white, and the light color is adjusted to the planting color to enhance the production effect. Nothing that can be toned was provided.

Note that variable color illumination systems with variable emission colors include illumination systems used for stage lighting and the like, and each uses a light source having R, G, and B emission colors, and a dimming console adjusts each light source. By individually controlling the light ratio, the RGB color mixing ratio is changed to obtain light emission of an arbitrary light color. For example, as shown in Patent Document 1, light sources of the three primary colors R, G, and B are used, and the dimming control unit uses each of the light sources based on a setting signal sent from the remote control transmission unit as a wireless transmission signal. There has also been conventionally provided a variable color illumination system in which a dimming ratio is set and a dimming device turns on each light source at the set dimming ratio.
JP-A-5-21168 (paragraph numbers [0017] to [0021] and FIG. 1)

  In the above-mentioned spotlights for garden lights, the luminescent color cannot be changed, so that the effect of adjusting the light color according to the planting color cannot be obtained. In the variable color illumination system described above, an arbitrary emission color is obtained by adjusting the RGB color mixture ratio, but a large-scale system using a dimming console or a remote control transmitter to dimm each light source. However, it was large and expensive to plant or install in a private house.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a variable color LED lighting device that is small and can easily change the emission color.

  In order to achieve the above object, the invention of claim 1 includes a plurality of light emitting diodes having different emission colors, a turntable on which each light emitting diode is attached, and is provided rotatably with respect to the illumination device body. The light output setting unit for setting the light output of each light emitting diode with respect to the rotation angle so that the light output of each light emitting diode changes asynchronously according to the rotation angle of the turntable, and each light emitting diode by the light output setting unit It is characterized by comprising a lighting circuit section for lighting each with a set light output.

  According to the first aspect of the present invention, when the turntable to which the plurality of light emitting diodes are attached is rotated with respect to the lighting device body, the light output setting unit outputs the light output of each light emitting diode according to the rotation position of the turntable. Since the lighting circuit unit lights each light emitting diode with the light output set by the light output setting unit, the light output of a plurality of light emitting diodes with different emission colors is asynchronously set according to the rotation angle. By changing the color mixture ratio, the color mixture ratio can be changed to obtain a color mixture light having a desired light color. Moreover, since the light output of each light emitting diode is set by the light output setting unit simply by rotating the turntable relative to the lighting device body, the light emission color can be easily changed, and the light control table Therefore, a small variable color LED lighting device that can be easily installed in an installation place such as planting or a garden can be realized.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  The variable color LED lighting device A of the present embodiment is a spotlight type lighting device that is installed in a planting or garden as shown in FIG. 5 and performs effect lighting such as planting 16. As shown, a pole 1 pierced and fixed to the ground, an arm 2 attached to the upper end of the pole 1 so as to be rotatable in the circumferential direction around the pole 1, and a shaft provided at the upper end of the arm 2 And a substantially cylindrical lighting device body 4 attached to the arm 2 so as to be rotatable about the portion 3. On the one end side in the axial direction of the illuminating device body 4, there is provided a turntable 5 attached to the illuminating device body 4 so as to be rotatable about a shaft 15. On the surface opposite to the surface on which the light is to be emitted, there are three light emitting diodes LED (R), LED (G), and LED (B) having different emission colors (for example, three primary colors R, G, and B). Are arranged at equal intervals on the same circumference centered on the rotation center.

  FIG. 2 is an internal circuit diagram of the variable color LED lighting device A. The DC power supply unit 6 rectifies and smoothes the power supply voltage of the commercial power supply AC to convert it into a DC voltage having a predetermined voltage value, and the high voltage side of the DC power supply unit 6. The above-mentioned light emitting diodes LED (R), LED (G), LED (B) each having an anode connected to the end, and the cathodes of the respective light emitting diodes LED (R), LED (G), LED (B), respectively Resistors R1, R2, and R3 connected at one end, and variable resistors VR1, VR2, and VR3 connected between the other ends of the resistors R1, R2, and R3 and the low-voltage end of the DC power supply unit 6, respectively. I have. Here, a light output setting unit 17 that sets the light output of the light emitting diodes LED (R), LED (G), and LED (B) is configured by the variable resistors VR1, VR2, and VR3. Further, a lighting circuit unit 18 that lights each of the light emitting diodes LED (R), LED (G), and LED (B) with the light output set by the light output setting unit 17 from the DC power supply unit 6 and the resistors R1 to R3 and the like. Composed.

  The light emitting diodes LED (R), LED (G), LED (B), resistors R1 to R3, and variable resistors VR1 to VR3 are provided on the turntable 5, and the DC power supply unit 6 is housed inside the lighting device body 4. Yes. On the surface of the turntable 5 facing the illuminating device main body 4, a conductive plate 7 formed in an annular shape centering on the shaft 15 as shown in FIG. Arc-shaped resistors 8, 9, 10 are arranged concentrically with the conductive plate 7 on the inner side (side closer to the shaft 15) than 7. 3A is a plan view of the rear surface of the turntable 5 (surface facing the illumination device main body 4), and FIG. 3B is a plan view of the front surface of the illumination device main body 4 (surface facing the turntable 5). 3, “0 degree”, “90 degree”, “180 degree”, and “270 degree” in FIG. 3A indicate that the point F of the turntable 5 overlaps the point B of the lighting device body 4. The positions corresponding to the positions of “0 degree”, “90 degrees”, “180 degrees”, and “270 degrees” of the lighting device main body 4 are shown.

  The conductive plate 7 is electrically connected to the anodes of the light emitting diodes LED (R), LED (G), and LED (B). Of the resistors 8, 9, and 10, the outermost resistor 8 constitutes a variable resistor VR1, and is formed from a position of 0 degrees to a position of 240 degrees counterclockwise in the direction shown in FIG. It is electrically connected to the resistor R1 at the 0 degree position. The central resistor 9 forms a variable resistor VR2, is formed from a position of 120 degrees to a position of 360 degrees (0 degrees) counterclockwise, and is electrically connected to the resistor R2 at a position of 120 degrees. The innermost resistor 10 constitutes a variable resistor VR3, is formed from a position of 240 degrees to a position of 120 degrees counterclockwise, and is electrically connected to the resistor R3 at a position of 240 degrees. In FIG. 3B, the positions of the conductive plate 7 and the resistors 8 to 10 when the rotary table 5 is rotated to a position where the point F of the rotary table 5 overlaps with the point B of the lighting device body 4 are indicated by dotted lines. It is shown.

  On the other hand, the surface (front surface) of the illuminating device body 4 facing the turntable 5 passes through the center E of the illuminating device body 4 and has a line segment L1 having a central angle of about 240 degrees as shown in FIG. Four sliding contact terminals 11 to 14 are provided on the top. Here, the sliding contact terminal 11 is provided at a position corresponding to the conductive plate 7 of the turntable 5, and is electrically connected to the high-voltage side output end of the DC power supply unit 6. The sliding contact terminals 12 to 14 are provided at positions corresponding to the resistors 8, 9, and 10, respectively, and are commonly connected to the low-voltage side output end of the DC power supply unit 6.

  Thus, the turntable 5 is attached to the illuminating device main body 4 so as to be rotatable about the shaft 15, and the turntable 5 is rotated to a position where the point F of the turntable 5 and the point B of the illuminating device main body 4 overlap. In this state, the resistance value of the variable resistor VR1 is the maximum, the resistance value of the variable resistor VR2 is r / 2 (where all the resistors 8, 9, and 10 are all r), and the resistance value of the variable resistor VR3 is approximately As shown in FIGS. 4A to 4C, the light output of the light emitting diode LED (R) is the minimum value Lmin of the fluctuation range, and the light output of the light emitting diode LED (G) is the median value of the fluctuation range. The light output of the light emitting diode LED (B) becomes the maximum value Lmax of the fluctuation range.

  From this state, when the turntable 5 is rotated clockwise to a position of 120 degrees (a position where the point F of the turntable 5 overlaps the point C of the illuminating device body 4), the resistor that contacts the sliding contact terminals 12 and 13 As the portions 8 and 9 move, the resistance values of the variable resistors VR1 and VR2 gradually decrease, and the light outputs of the light emitting diodes LED (R) and LED (G) increase. When the turntable 5 is rotated to a position of 120 degrees, the light output of the light emitting diode LED (R) is an intermediate value of the fluctuation range, and the light output of the light emitting diode LED (G) is the maximum value Lmax of the fluctuation range. Become. In addition, when the rotation angle θ of the turntable 5 is in the range of 0 <θ <120 (degrees), the sliding contact terminal 14 is not in contact with the resistor 10, so that no current flows through the light emitting diode LED (B), and the light emitting diode LED (B) is turned off.

  Further, when the turntable 5 is rotated from a position of 120 degrees to a position of 240 degrees, the resistance value of the variable resistor VR1 gradually decreases due to the movement of the portion of the resistor 8 that contacts the sliding contact terminal 12. The light output of the light emitting diode LED (R) gradually increases. Further, when the sliding contact terminal 14 comes into contact with the resistor 10 and the contact portion moves, the resistance value of the variable resistor VR3 gradually decreases from the maximum value, and the light output of the light emitting diode LED (B) gradually increases. To increase. When the turntable 5 is rotated to a position of 240 degrees, the light output of the light emitting diode LED (R) is the maximum value Lmax of the fluctuation range, and the light output of the light emitting diode LED (B) is the intermediate value of the fluctuation range. Become. In addition, when the rotation angle θ of the turntable 5 is in the range of 120 <θ <240 (degrees), the sliding contact terminal 13 is not in contact with the resistor 9, so that no current flows through the light emitting diode LED (G), and the light emitting diode LED. (G) is turned off.

  Furthermore, when the turntable 5 is rotated from a 240 degree position to a 360 degree position, the resistance 10 of the variable resistor VR3 gradually decreases due to the movement of the part of the resistor 10 that contacts the sliding contact terminal 14. Thus, the light output of the light emitting diode LED (B) gradually increases. Further, when the sliding contact terminal 13 comes into contact with the resistor 9 and the contact portion moves, the resistance value of the variable resistor VR2 gradually decreases from the maximum value, and the light output of the light emitting diode LED (G) gradually increases. To increase. When the turntable 5 is rotated to a position of 360 degrees (0 degrees), the light output of the light emitting diode LED (G) is an intermediate value in the fluctuation range, and the light output of the light emitting diode LED (B) is in the fluctuation range. The maximum value is Lmax. Further, when the rotation angle θ of the turntable 5 is in the range of 240 <θ <360 (degrees), the sliding contact terminal 12 is not in contact with the resistor 8, so that no current flows through the light emitting diode LED (R), and the light emitting diode LED (R) is turned off.

  Here, since the light emission colors of the three light emitting diodes LED (R), LED (G), and LED (B) are different from each other, each light emitting diode LED (R), LED (G), LED on the irradiated surface. The mixed color light which mixed the irradiation light of (B) will be irradiated. When the turntable 5 is rotated as described above, the resistance values of the variable resistors VR1, VR2, VR3 change asynchronously according to the rotation angle, and the light emitting diodes LED (R), LED (G), Since the light output of the irradiation light of the LED (B) changes asynchronously, the color mixture ratio of R, G, B changes, and the light color of the color mixture light changes. Thus, in this device, the light color of the mixed color light can be easily changed by simply rotating the turntable 5, and the variable color LED lighting device A according to the object to be illuminated (for example, the planting color). By changing the light emission color, it is possible to perform illumination with a higher effect.

  By the way, in this embodiment, the resistance values of the variable resistors VR1 to VR3 connected in series to the respective light emitting diodes LED (R), LED (G), and LED (B) are changed according to the rotation angle of the turntable 5. The light output of each of the light emitting diodes LED (R), LED (G), and LED (B) is changed to adjust the light output. The light emitting diodes LED (R), LED (G), LED While supplying the pulse current to (B), the light output setting unit sets the duty ratio of the pulse current flowing through each light emitting diode LED (R), LED (G), LED (B) according to the rotation angle of the turntable 5. The light output may be changed by changing asynchronously.

  In the present embodiment, the light emitting diodes LED (R), LED (G), and LED (B) having the three primary colors R, G, and B are provided. However, the number of light emitting diodes is limited to three. It is sufficient that two or more light emitting diodes having different light colors are provided, and by changing the light output of the plurality of light emitting diodes asynchronously according to the rotation angle of the turntable 5, the irradiation light can be emitted in the same manner as described above. The light color of the mixed light can be changed by changing the color mixture ratio.

  Furthermore, in this embodiment, while the turntable 5 rotates 360 degrees, each light emitting diode LED (R), LED (G), and LED (B) are provided with 120 degree intervals, and each light emitting diode LED ( R), LED (G), and LED (B) are provided so that the extinguishing sections do not overlap with each other, so that at each rotational position, three-color light emitting diodes LED (R), LED (G), LED (B) Of these, two colors are turned on and one color is turned off. Then, according to the rotation angle of the turntable 5, the light color and color mixing ratio of the irradiated light change by changing the combination of light emitting diodes to be turned on and the light output of each light emitting diode, and the light color of the mixed light is changed. Although it changes, it is not intended to limit the combination of light emitting diodes that are lit at each rotational position of the turntable 5 or the light output to the setting shown in FIG. 4, but to rotate to obtain a desired emission color. What is necessary is just to set the light output of each light emitting diode LED (R), LED (G), LED (B) according to the rotation angle of the stand 5.

  Moreover, in this embodiment, although the electrically conductive plate 7 and the resistors 8-10 are arrange | positioned on the surface of the turntable 5 which opposes the illuminating device main body 4, the form of the electrically conductive plate 7 and the resistors 8-10 is said form. The cylindrical insertion hole into which the cylindrical shaft portion provided on the other side is inserted is provided in one of the lighting device main body 4 and the turntable 5, and the shaft portion and the insertion hole are not limited to the above. Among them, the conductive plate 7 and the resistors 8 to 10 may be provided on one peripheral surface, and the sliding contact terminal that contacts the conductive plate 7 and the resistors 8 to 10 may be provided on the other peripheral surface.

The variable color LED illuminating device of this embodiment is shown, (a) is the figure which looked at the turntable from the front side, (b) is explanatory drawing explaining the rotation state of a turntable. It is a circuit diagram same as the above. The same as the above, (a) is a rear view of the turntable, and (b) is a front view of the lighting device main body. (A)-(c) is a figure which shows the relationship between the rotation angle of a turntable same as the above, and the optical output of a light emitting diode. It is explanatory drawing explaining a use condition same as the above.

Explanation of symbols

A Variable color LED lighting device LED (R), LED (G), LED (B) Light emitting diode 4 Lighting device body 5 Turntable 17 Light output setting unit 18 Lighting circuit unit

Claims (1)

  A plurality of light emitting diodes having different emission colors, a turntable attached to each of the light emitting diodes and rotatably provided with respect to the illuminating device main body, and each light emitting diode according to the rotation angle of the turntable A light output setting unit for setting a light output of each light emitting diode with respect to a rotation angle so that the light output changes asynchronously, and a lighting circuit for lighting each light emitting diode with the light output set by the light output setting unit. A variable color LED illumination device.

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