JP2012094272A - Lighting system - Google Patents

Abstract

Provided is a lighting device capable of turning on a light source for a longer period of time and improving visibility.
A solar power generation unit that generates power by sunlight, a storage battery unit that stores power generated by the solar power generation unit, a remaining amount detection unit that detects a remaining amount of the storage battery unit, and a relative A light source unit 4 including a first light source 4a from which light having a high color temperature is obtained and a second light source 4b from which light having a relatively low color temperature is obtained compared to the first light source 4a, and a storage battery unit The first lighting device 6a for lighting the first light source 4a using 2 as a power source, the second lighting device 6b for lighting the second light source 4b using the storage battery unit 2 as a power source, and the remaining amount using the storage battery unit 2 as a power source Dimming the first light source 4a and the second light source 4b by controlling the first lighting device 6a and the second lighting device 6b based on the remaining amount of the storage battery unit 2 detected by the detection unit 3. And a control unit 5.
[Selection] Figure 1

Description

  The present invention relates to a lighting device using power generation by sunlight.

  2. Description of the Related Art Conventionally, as a lighting device using solar power generation (hereinafter referred to as solar power generation), an LED or fluorescent lamp is used for a light source unit, and a lighting device that automatically turns on a light source unit at night has been proposed. (For example, refer to Patent Document 1).

  For example, as shown in FIG. 8, the lighting device using this type of solar power generation includes a solar power generation unit 11 that generates power using sunlight, a storage battery unit 12 that stores electric power generated by the solar power generation unit 11, and And a light source unit 14 that is lit with electric power stored in the storage battery unit 12.

  By the way, in an environment where the surroundings are bright, it is known that illumination with light having a relatively low color temperature provides higher visibility than illumination with light having a relatively high color temperature. It has been. Also, in an environment where the surroundings are dark, it is known that illumination with light having a relatively high color temperature is more visible than illumination with light having a relatively low color temperature. It has been. These are due to Purkinje's phenomenon. In an environment where the surroundings are bright, light with a relatively low color temperature appears bright and light with a relatively high color temperature appears dark. In an environment where the surroundings are dark, light with a relatively low color temperature appears dark and light with a relatively high color temperature appears bright due to Purkinje's phenomenon.

JP 2007-227324 A

  By the way, since the illuminating device of the structure shown in FIG. 8 stores the electric power generated in the solar power generation unit 11 in the storage battery unit 12 and turns on the light source unit 14 with the electric power stored in the storage battery unit 12, the storage battery unit 12 When the amount of power stored in is large, the light source unit 14 can be turned on with a relatively high light output.

  However, in the lighting device having the configuration shown in FIG. 8, when the amount of power stored in the storage battery unit 12 is small, the light source unit 14 is turned on with a relatively low light output in order to light the light source unit 14 for a long time. It was necessary to turn on and reduce power consumption in the lighting device. Further, in the lighting device having the configuration shown in FIG. 8, when a light source having a relatively low color temperature is used for the light source unit 14, there is a problem that visibility becomes low due to Purkinje phenomenon in an environment where the surroundings are dark. Furthermore, the illumination device having the configuration shown in FIG. 8 has a problem that visibility becomes low due to Purkinje phenomenon in a bright environment when a light source having a relatively high color temperature is used for the light source unit 14.

  The present invention has been made in view of the above reasons, and an object of the present invention is to provide an illuminating device capable of lighting a light source unit for a longer period of time and improving visibility. .

  The lighting device of the present invention includes a solar power generation unit that generates power using sunlight, a storage battery unit that stores power generated by the solar power generation unit, a remaining amount detection unit that detects a remaining amount of the storage battery unit, and a relative A light source unit including a first light source capable of obtaining light having a high color temperature and a second light source capable of obtaining light having a relatively low color temperature as compared with the first light source, and powering the storage battery unit. A first lighting device for lighting the first light source, a second lighting device for lighting the second light source using the storage battery unit as a power source, and a detection by the remaining amount detection unit using the storage battery unit as a power source A controller for dimming the first light source and the second light source by controlling the first lighting device and the second lighting device based on the remaining amount of the storage battery unit A lighting device comprising:

  In this lighting device, the control unit may perform dimming so that only the first light source is lit when the remaining amount of the storage battery unit detected by the remaining amount detection unit is a predetermined value or less. preferable.

  In this lighting device, the control unit performs dimming so as to turn on the second light source when the remaining amount of the storage battery unit detected by the remaining amount detection unit is larger than the predetermined value. Is preferred.

  In this illumination device, the control unit switches the first light source and the first light source so that the brightness of the light source unit does not change when switching the dimming rate between the first light source and the second light source. It is preferable to gradually increase the dimming rate of one of the two light sources and gradually decrease the other dimming rate.

  In the illuminating device of this invention, it is possible to light a light source part for a long time, and it becomes possible to improve visibility.

It is a schematic block diagram which shows the illuminating device of this embodiment. It is explanatory drawing of the emission spectrum of the 1st light source in an illuminating device same as the above. It is explanatory drawing of the emission spectrum of the 2nd light source in an illuminating device same as the above. It is explanatory drawing of the discharge voltage of the storage battery part in an illuminating device same as the above. It is operation | movement explanatory drawing of an illuminating device same as the above. It is operation | movement explanatory drawing of an illuminating device same as the above. It is operation | movement explanatory drawing of an illuminating device same as the above. It is an external appearance perspective view of the illuminating device which shows a prior art example.

  Hereinafter, the illuminating device of this embodiment is demonstrated, referring FIGS.

  As illustrated in FIG. 1, the lighting device of the present embodiment includes a solar power generation unit 1 that generates power using sunlight, and a storage battery unit 2 that stores electric power generated by the solar power generation unit 1.

  In addition, the lighting device includes a first light source 4a that can obtain light having a relatively high color temperature, and a second light source 4b that can obtain light having a relatively low color temperature compared to the first light source 4a. The light source unit 4 is provided. Hereinafter, for convenience of explanation, the first light source 4a is referred to as a high color temperature light source 4a, and the second light source 4b is referred to as a low color temperature light source 4b.

  The lighting device further includes a first lighting device 6a that turns on the light source 4a having a high color temperature and a second lighting device 6b that lights the light source 4b having a low color temperature. In addition, the electric power stored in the storage battery unit 2 is supplied to the first lighting device 6a and the second lighting device 6b.

  The lighting device includes a remaining amount detection unit 3 that detects the remaining amount of power stored in the storage battery unit 2 and a first lighting device based on the remaining amount of the storage battery unit 2 detected by the remaining amount detection unit 3. A control unit 5 is provided that controls the light source 4a having a high color temperature and the light source 4b having a low color temperature by controlling the 6a and the second lighting device 6b. The control unit 5 is supplied with electric power stored in the storage battery unit 2.

  The storage battery unit 2 is charged with a DC voltage supplied from the solar power generation unit 1 via a charging unit (not shown) that charges the storage battery unit 2. In addition, the storage battery unit 2 supplies the DC voltage charged in the storage battery unit 2 to the first lighting device 6a and the second lighting device 6b, respectively. In other words, each lighting device 6a, 6b lights each light source 4a, 4b by using the storage battery unit 2 as a power source.

  The light source 4a having a high color temperature is a light source using a white LED having an LED chip and can be dimmed. The high color temperature light source 4a has an emission spectrum as shown in FIG. 2, an emission peak wavelength λ1 (see FIG. 2) of 507 nm, a color temperature of 10,000 K, a luminous flux of 500 lumens, and a luminous efficiency of 100 lumens. Although this is / W, this numerical example is only an example and is not particularly limited.

  The light source 4b having a low color temperature is a light source using a white LED having an LED chip and can be dimmed. The low color temperature light source 4b has an emission spectrum as shown in FIG. 3, the emission peak wavelength λ2 (see FIG. 3) is 555 nm, the color temperature is 5000 K, the luminous flux is 2000 lumens, and the luminous efficiency is 100 lumens. Although this is / W, this numerical example is only an example and is not particularly limited.

  The high color temperature light source 4a and the low color temperature light source 4b include a blue LED chip and a phosphor made of a yellow phosphor that emits broad yellow light when excited by the blue light emitted from the blue LED chip. It is composed of white LEDs that combine to obtain white light. The phosphors of the high color temperature light source 4a and the low color temperature light source 4b are not limited to yellow phosphors, and, for example, red phosphors and green phosphors may be used. The high color temperature light source 4a and the low color temperature light source 4b are white that obtains white light by combining a purple to near-ultraviolet LED chip with a phosphor using a red phosphor, a green phosphor, and a blue phosphor. You may be comprised with LED. Furthermore, the high color temperature light source 4a and the low color temperature light source 4b may be configured by white LEDs that obtain white light by combining a red LED chip, a green LED chip, and a blue LED chip. The configuration of the high color temperature light source 4a and the low color temperature light source 4b may be a configuration in which an LED chip is mounted on a mounting substrate. Moreover, although the high color temperature light source 4a and the low color temperature light source 4b use white LEDs, a fluorescent lamp or the like may be used.

  The control unit 5 includes a microcomputer, and sends a first dimming signal for dimming the high color temperature light source 4a to the first lighting device 6a. In addition, the control unit 5 sends a second dimming signal for dimming the low color temperature light source 4b to the second lighting device 6b. The control unit 5 is constituted by a microcomputer, but a circuit may be constituted by discrete components, for example.

  The first dimming signal and the second dimming signal are signals composed of PWM signals, and the first dimming signal includes information on the dimming rate of the light source 4a having a high color temperature. The light control signal 2 includes information on the light control rate of the light source 4b having a low color temperature. The dimming rate of the high color temperature light source 4a is represented by the duty ratio of the first dimming signal. The dimming rate of the low color temperature light source 4b is expressed by the duty ratio of the second dimming signal.

  Therefore, the control unit 5 can control the first lighting device 6a by sending the first dimming signal to the first lighting device 6a, and can dim the light source 4a having a high color temperature. . Further, the control unit 5 can control the second lighting device 6b by sending the second dimming signal to the second lighting device 6b, and can dim the light source 4b having a low color temperature. .

  The first lighting device 6 a turns on or off the high color temperature light source 4 a based on the first dimming signal sent from the control unit 5.

  The second lighting device 6b turns on or off the low color temperature light source 4b based on the second dimming signal sent from the control unit 5.

  The remaining amount detection unit 3 detects the remaining amount of electric power stored in the storage battery unit 2 by detecting a discharge voltage (see FIG. 4) discharged from the storage battery unit 2. The remaining amount detection unit 3 sends the detected discharge voltage of the storage battery unit 2 to the control unit 5. The control unit 5 is provided with an A / D conversion unit (not shown) that converts the analog discharge voltage of the storage battery unit 2 sent from the remaining amount detection unit 3 into a digital voltage value.

  Further, the control unit 5 calculates the remaining amount of power stored in the storage battery unit 2 based on the voltage value converted by the A / D conversion unit.

  Furthermore, when the remaining amount of power stored in the storage battery unit 2 is equal to or less than a predetermined value V1 (see FIG. 5), the control unit 5 controls the first lighting device 6a to control the high color temperature light source 4a. Dimming only to light up. Moreover, the control part 5 is made to light the light source 4b of low color temperature by controlling the 2nd lighting device 6b, when the residual amount of the electric power stored in the storage battery part 2 is larger than predetermined value V1. To dimm. Accordingly, the control unit 5 controls the first lighting device 6a and the second lighting device 6b based on the remaining amount of the storage battery unit 2 to thereby change the high color temperature light source 4a and the low color temperature light source 4b. The light can be dimmed.

  Hereinafter, the operation of dimming the high color temperature light source 4a and the low color temperature light source 4b in the illumination device of the present embodiment will be described with reference to FIG. Here, the vertical axis shown in FIG. 6 represents power consumption in the light source unit 4, and the horizontal axis shown in FIG. 6 represents time. Further, t1 shown in FIG. 6 indicates a time point when the remaining amount of the storage battery unit 2 detected by the remaining amount detection unit 3 is a predetermined value V1.

  When the remaining amount of the storage battery unit 2 detected by the remaining amount detection unit 3 is larger than a predetermined value V1 (for example, 10V), the control unit 5 adjusts the duty ratio to 100%. Is sent to the second lighting device 6b, and a first dimming signal whose duty ratio is adjusted to 0% is sent to the first lighting device 6a. Based on the second dimming signal sent from the control unit 5, the second lighting device 6b dims the low color temperature light source 4b, which is the second light source 4b, at a dimming rate of 100%. Further, the first lighting device 6a dims the high color temperature light source 4a, which is the first light source 4a, at a dimming rate of 0% based on the first dimming signal sent from the control unit 5. To do. In this case, the power consumption in the light source unit 4 is the power consumption W1 in the low color temperature light source 4b, which is 20 W.

  In addition, when the remaining amount of the storage battery unit 2 detected by the remaining amount detection unit 3 is equal to or less than the predetermined value V1, the control unit 5 outputs the first dimming signal with the duty ratio adjusted to 100% as the first dimming signal. While sending to the lighting device 6a, the 2nd light control signal which adjusted the duty ratio to 0% is sent to the 2nd lighting device 6b. Based on the first dimming signal sent from the control unit 5, the first lighting device 6a dims the high color temperature light source 4a, which is the first light source 4a, at a dimming rate of 100%. The second lighting device 6b controls the light source 4b having a low color temperature, which is the second light source 4b, at a dimming rate of 0% based on the second dimming signal sent from the control unit 5. To do. The power consumption in the light source unit 4 in this case is the power consumption W2 in the high color temperature light source 4a, which is 5W.

  Here, in the lighting device of the present embodiment, when the remaining amount of power stored in the storage battery unit 2 is equal to or less than the predetermined value V1, the first lighting device 6a is installed to reduce the power consumption in the lighting device. The light is adjusted so that only the high color temperature light source 4a is turned on by controlling. Moreover, in the illuminating device of this embodiment, when the remaining amount of the electric power stored in the storage battery unit 2 is larger than the predetermined value V1, it is not necessary to worry about the power consumption in the illuminating device. The light is adjusted so that the light source 4b having a low color temperature is turned on by controlling the device 6b. Therefore, as shown in FIG. 6A, the illumination device of the present embodiment has a light source unit as compared with a case where only the light source 4b having a low color temperature that is the light source unit 4 is turned on (see FIG. 6B). 4 can be lit for a longer time.

  Moreover, in the illuminating device of this embodiment, when the remaining amount of the electric power stored in the storage battery unit 2 is equal to or less than a predetermined value V1, the light source 4a having a high color temperature is turned on by controlling the first lighting device 6a. For example, even if the surroundings are dark, visibility can be improved by the Purkinje phenomenon. Furthermore, in the lighting device according to the present embodiment, when the remaining amount of power stored in the storage battery unit 2 is larger than the predetermined value V1, the light source 4b having a low color temperature is turned on by controlling the second lighting device 6b. Therefore, for example, even in an environment where the surroundings are bright, visibility can be improved by the Purkinje phenomenon.

  Hereinafter, the operation of the control unit 5 when switching the dimming rate between the high color temperature light source 4a and the low color temperature light source 4b will be described with reference to FIG. Here, the vertical axis shown in FIG. 7A represents the dimming rate of the low color temperature light source 4b, which is the second light source 4b, and the vertical axis shown in FIG. 7B is the first light source 4a. The dimming rate of the high color temperature light source 4a is shown.

  When switching the dimming rate between the high color temperature light source 4a and the low color temperature light source 4b, the control unit 5 sets the dimming rate of the low color temperature light source 4b for a predetermined time (see FIG. 7). 7 is gradually lowered over a period of time t1 to time t3 (for example, 1 minute) (light emitted from the light source 4b having a low color temperature is faded out over a predetermined time), and the light source 4b having a low color temperature is used. The dimming rate of the high color temperature light source 4a is gradually increased over the remaining time from time t2 when the luminous flux reaches 500 lumens (the light emitted from the high color temperature light source 4b fades in over the remaining time).

  Therefore, the illumination device of the present embodiment has a high color temperature light source 4a so that the brightness of the light source unit 4 does not change when switching the dimming rate between the high color temperature light source 4a and the low color temperature light source 4b. The brightness of the light source unit 4 can be kept constant by gradually increasing the dimming rate of one of the light source 4b and the low color temperature light source 4b and gradually decreasing the other dimming rate. As a result, in the illumination device of the present embodiment, it is possible to suppress flickering during lighting by the light source unit 4 that occurs when switching the dimming rate between the high color temperature light source 4a and the low color temperature light source 4b. Become.

  The illuminating device of the present embodiment described above controls the first lighting device 6a and the second lighting device 6b based on the remaining amount of power stored in the storage battery unit 2, and thereby the high color temperature light source 4a. And the low color temperature light source 4b, the light source unit 4 can be lit for a longer time than when only the low color temperature light source 4b that is the light source unit 4 is lit, and Visibility can be improved.

DESCRIPTION OF SYMBOLS 1 Photovoltaic power generation part 2 Storage battery part 3 Remaining battery detection part 4 Light source part 4a 1st light source 4b 2nd light source 5 Control part 6a 1st lighting device 6b 2nd lighting device

Claims (4)

  A solar power generation unit that generates power by sunlight, a storage battery unit that stores the power generated by the solar power generation unit, a remaining amount detection unit that detects the remaining amount of the storage battery unit, and light having a relatively high color temperature A light source unit including a first light source obtained and a second light source capable of obtaining light having a color temperature relatively lower than that of the first light source; and the first light source using the storage battery unit as a power source. A first lighting device for lighting, a second lighting device for lighting the second light source using the storage battery unit as a power source, and a remaining battery unit detected by the remaining amount detection unit using the storage battery unit as a power source. A lighting unit comprising: a control unit that dims the first light source and the second light source by controlling the first lighting device and the second lighting device based on a quantity. apparatus.   The said control part adjusts so that only the said 1st light source may be lighted, when the residual amount of the said storage battery part detected by the said residual amount detection part is below a predetermined value. The lighting device according to 1.   The said control part adjusts so that the said 2nd light source may be lighted, when the residual amount of the said storage battery part detected by the said residual amount detection part is larger than the said predetermined value. Item 3. The lighting device according to Item 2.   The control unit switches between the first light source and the second light source so that the brightness by the light source unit does not change when switching the dimming rate between the first light source and the second light source. The lighting device according to any one of claims 1 to 3, wherein one dimming rate is gradually increased and the other dimming rate is gradually decreased.

Images