JP2013048045A - Luminaire and lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve usability by allowing reproduction of a state of arbitrary color control and light control.SOLUTION: A control part 5 that has received a color control up command from a remote controller 200 prefers light control, and controls a first lighting circuit part 3 and a second lighting circuit part 4 so as to trace back the history of transition from a first light control/color control state to a second light control/color control state. Therefor, a light control ratio between a first light source part 1 and a second light source part 2 is controlled so as to return to the first light control/color control state (coordinate position ○) which is stored in a memory. As a result, an arbitrary color control state and light control state can be reproduced, for improved usability.

Description

  The present invention relates to a lighting device using a light emitting diode (LED) as a light source, and a lighting fixture using the lighting device.

  Conventionally, lighting has multiple types of light sources with different emission colors, and the light output of each light source can be dimmed by adjusting (dimming) the light output separately to mix the colors. A device is provided.

  For example, Patent Document 1 includes a white LED that emits white light, a daylight color LED that emits daylight color light, and a light bulb color LED that emits light of a bulb color. A lighting device that adjusts and adjusts the color separately is described. In this conventional example, an infrared signal transmitted from an infrared remote controller is received, and the light output of each color LED is determined in accordance with a control command included in the infrared signal.

Japanese Patent Laying-Open No. 2010-49123 (see paragraphs 0061 to 0068 and FIG. 8)

  By the way, in a lighting device in which a daylight color light source and a light bulb color light source are used, when toning control is performed while maintaining a constant brightness (illuminance) in a state where at least one of the light sources is rated on, The brightness cannot be kept constant after reaching the toning limit in the dimming state. Then, when the toning control in the reverse direction is performed after the transition from the first toning state to another toning state in which the brightness has changed, conventionally, the toning control has priority over the dimming control. For this reason, it was not possible to return to the first dimming state (brightness) and the usability was not good.

  The present invention has been made in view of the above problems, and an object of the present invention is to improve usability by making it possible to reproduce an arbitrary toning and dimming state.

  The lighting device of the present invention emits light having a first color source having one or more light emitting diodes that emit light having a first color temperature, and light having a second color temperature different from the first color temperature. A second light source unit having one or more light emitting diodes, a first lighting circuit unit for supplying power to the first light source unit for lighting, and a second lighting circuit unit for supplying power to the second light source unit for lighting. In addition, the first light source unit and the second light source unit can be controlled arbitrarily by controlling the first lighting circuit unit and the second lighting circuit unit based on the toning command and the dimming command given from the outside. A control unit that transitions to a state, and the control unit performs a second dimming / difference different from the first dimming / toning state from the first dimming / toning state based on the toning instruction. After controlling the first lighting circuit unit and the second lighting circuit unit to transition to the toning state, the first lighting circuit unit When the toning command is given in the opposite direction to the transition from the dimming / toning state to the second dimming / toning state, the second dimming / toning state is changed to the second The first lighting circuit unit and the second lighting circuit unit are controlled so as to trace the history of the transition to the light control / color control state in the reverse direction.

  In this lighting device, the control unit turns on the first light source unit at the upper limit of the dimming range and provides the second light source when a toning command for toning the light color of the first color temperature is given. The first lighting circuit unit and the second lighting circuit unit are controlled so that the light source unit is turned on or off at the lower limit of the dimming range, and a toning command for toning the light color at the second color temperature is given. The first lighting circuit unit and the second lighting circuit unit so that the second light source unit is turned on at the upper limit of the dimming range and the first light source unit is turned on or off at the lower limit of the dimming range. The first lighting circuit unit and the first light source unit and the second light source unit are turned on at the upper limit of the dimming range when a dimming command for dimming to the brightest state is given. It is preferable to control the second lighting circuit unit.

  In this lighting device, the remote controller that provides the control unit with the dimming command and the toning command, the remote controller has a push button to be pushed, each time the push button is pushed, A toning command for toning the light color at the first color temperature, a toning command for toning the light color at the second color temperature, and a dimming command for dimming to the brightest state in order. It is preferable to give to the control unit.

  The lighting device includes a storage unit that stores the dimming / toning state, and the control unit stores the arbitrary dimming / toning state in the storage unit, and the storage unit stores the arbitrary dimming / toning state. It is preferable to control the first lighting circuit unit and the second lighting circuit unit so as to reproduce the dimming / coloring state.

  In this lighting device, it is preferable that the control unit stores the light control / color adjustment state in the storage unit in accordance with a storage command given from the outside.

  In this lighting device, the control unit controls the first lighting circuit unit and the second lighting circuit unit to dimm the first light source unit and the second light source unit, and It is preferable to control the first lighting circuit unit and the second lighting circuit unit so that the number of steps in the step dimming is larger on the lower limit side than on the upper limit side in the dimming range.

  In this lighting device, the control unit controls the first lighting circuit unit and the second lighting circuit unit to dimm the first light source unit and the second light source unit, and A brightness detection unit configured to detect brightness of an illumination space irradiated with light from the first light source unit and the second light source unit, wherein the control unit matches a detection value of the brightness detection unit with a target value; When controlling the first lighting circuit unit and the second lighting circuit unit as described above, the first lighting circuit unit is configured so that the first light source unit and the second light source unit are continuously dimmed in a plurality of stages. It is preferable to control the second lighting circuit unit.

  The lighting fixture of the present invention includes any one of the lighting devices and a fixture main body that holds the lighting device.

  The illuminating device and the luminaire of the present invention have an effect that it is possible to improve the usability by making it possible to reproduce an arbitrary toning and dimming state.

Embodiment 1 of the lighting device according to the present invention is shown, (a) is a block diagram, and (b) is a circuit configuration diagram of a lighting circuit section. (a)-(c) is a wave form diagram for demonstrating operation | movement of the control part in the same as the above. It is explanatory drawing for demonstrating the relationship between the light control ratio of a light source part in the same as the above, a total light control ratio, and a color control ratio. The remote controller in the same as above is shown, (a) is a block diagram, and (b) is a front view. It is a block diagram which shows Embodiment 2 of the illuminating device which concerns on this invention. It is explanatory drawing for demonstrating the automatic light control operation of a control part in the same as the above. It is explanatory drawing for demonstrating the automatic light control operation of a control part in the same as the above. It is a disassembled perspective view which shows embodiment of the lighting fixture which concerns on this invention.

  Hereinafter, embodiments of a lighting device and a lighting fixture according to the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
Lighting apparatus of this embodiment, FIG. 1 of the two as shown in (a) a light source unit 1,2,2 single lighting circuit unit 3 and 4, the control unit 5, the power factor improving circuit 6, the remote controller receiving section 7 I have. One light source unit (hereinafter referred to as a first light source unit) 1 is composed of one or more light emitting diodes that emit light (cool color light) having a first color temperature (for example, correlated color temperature 6500K). It has a series circuit. The other light source unit (hereinafter referred to as a second light source unit) 2 emits one or more light emitting diodes that emit light (warm color light) having a second color temperature (for example, correlated color temperature 3000K). It has a series circuit. These light source section 1 and 2, the voltage obtained by multiplying the number to forward voltage of each light emitting diode (hereinafter, referred to as a drive voltage.) Emits light (lighting) current flows by being applied. According to the Japanese Industrial Standard (JIS Z9110 Lighting Standard General Rules), light colors with a correlated color temperature of less than 3300K are `` warm colors '', light colors exceeding 5300K are `` cool colors '', and light colors in the range of 3300K to 5300K are `` intermediate colors '' Is defined.

  The power factor correction circuit 6 is a conventionally known step-up chopper circuit, and outputs a DC voltage higher than the AC voltage supplied from the commercial AC power supply 100. One lighting circuit unit (hereinafter referred to as a first lighting circuit unit) 3 is a switching unit that steps down the DC voltage output from the power factor correction circuit 6 to a desired DC voltage (driving voltage of the first light source unit 1). It has a power supply circuit. Similarly, the other lighting circuit unit (hereinafter referred to as a second lighting circuit unit) 4 converts the DC voltage output from the power factor correction circuit 6 to a desired DC voltage (driving voltage of the second light source unit 2). It has a switching power supply circuit that steps down.

  As shown in FIG. 1B, the first lighting circuit unit 3 and the second lighting circuit unit 4 include a step-down chopper circuit and drive circuits 30 and 40 that drive the step-down chopper circuit. The step-down chopper circuit is well known in the art, and the cathode of the diode D1 is connected to the positive output terminal of the power factor correction circuit 6, and between the anode of the diode D1 and the negative output terminal of the power factor improvement circuit 6. A series circuit of the switching element Q1 and the resistor R1 is inserted. A smoothing capacitor C1 made of an electrolytic capacitor and an inductor L1 are connected in series between the cathode and anode of the diode D1, and a discharging resistor R2 is connected to both ends of the smoothing capacitor C1. Each light emitting diode LED of the first light source unit 1 and the second light source unit 2 is connected in series between both ends of the smoothing capacitor C1. The operation of the step-down chopper circuit configured in this way is well known in the art, and the DC voltage stepped down from the input voltage (the output voltage of the power factor correction circuit 6) is smoothed by switching the switching element Q1 at a high frequency. The light is output to the first light source unit 1 and the second light source unit 2 from both ends of the capacitor C1. The drive circuits 30 and 40 switch the switching element Q1 in accordance with a control signal given from the control unit 5.

  The control unit 5 includes a microcomputer and hardware such as a memory such as a ROM and a RAM, and a program (software) stored in the ROM and executed by the microcomputer. And the operation | movement (process) of the control part 5 demonstrated below is implement | achieved when a microcomputer runs a program. The operating power supply of the control unit 5 is supplied from a power circuit (not shown) created from the output voltage of the power factor correction circuit 6.

  Here, the control unit 5 operates the switching power supply circuits of the lighting circuit units 3 and 4 intermittently and sets the duty ratio (= T1 / T0 × 100) of the operation period (ON period) T1 to the cycle T0 of the intermittent operation to 100%. The light output of the light source units 1 and 2 can be adjusted (dimmed) by increasing or decreasing within the range of the lower limit value (for example, 5%) (see FIG. 2). That is, the light output of the light source units 1 and 2 increases as the duty ratio increases as shown in FIG. 2B, and the light output of the light source units 1 and 2 decreases as the duty ratio decreases as shown in FIG. Decrease. As shown in FIG. 2A, when the duty ratio is 100% (the upper limit of the dimming range), the switching power supply circuit is always operated and the light source units 1 and 2 are lit at rated power. In the following description, the above-described duty ratio is referred to as a dimming ratio.

  In the present embodiment, the emission color (cool color) of the first light source unit 1 and the emission color (warm color) of the second light source unit 2 are different. Therefore, the control unit 5 changes the ratio between the light output (dimming ratio) of the first light source unit 1 and the light output (dimming ratio) of the second light source unit 2 to thereby change the first light source unit 1 and the second light source unit 2. The color of light (hereinafter referred to as illumination light) emitted from the light source unit 2 to the illumination space can be adjusted (toned) among warm colors, intermediate colors, and cool colors (see FIG. 3). That is, the light color becomes closer to cool as the ratio of the light output (dimming ratio) of the first light source unit 1 increases, and the color of light increases as the ratio of the light output (dimming ratio) of the second light source unit 2 increases. Close to warm colors. When the dimming ratio of the first light source unit 1 is higher than 0% and the dimming ratio of the second light source unit 2 is 0%, the light color is cool and the dimming ratio of the first light source unit 1 is Is 0% and the light control ratio of the second light source unit 2 is higher than 0%, the light color is warm. In the following description, the ratio (ratio) between the dimming ratio of the first light source unit 1 and the dimming ratio of the second light source unit 2 is referred to as the toning ratio, and the dimming ratio of the first light source unit 1 and the second dimming ratio. The sum of the dimming ratios of the two light source units 2 (the dimming ratio of the illumination light) is called the total dimming ratio.

  FIG. 3 is a diagram schematically illustrating the relationship between the light control ratio, the color control ratio, and the total light control ratio of the light source units 1 and 2. In FIG. 3, the positions of the vertices where two equal sides of the isosceles triangle intersect each other are such that the dimming ratio of the first light source unit 1 and the dimming ratio of the second light source unit 2 are both 100% (upper limit of the dimming range), That is, it corresponds to the light control / color control state in which the total light control ratio is set to 200%. Hereinafter, this state is referred to as “all-light state”. Note that the light color of the illumination light in the all-lamp state is an intermediate color. The left vertex of the other two vertices of the isosceles triangle has a dimming ratio of the first light source unit 1 of 100% and a dimming ratio of the second light source unit 2 of the dimming lower limit (or It corresponds to the dimming / toning state set to (OFF). Hereinafter, this state is referred to as a “cool color state”. On the other hand, the position of the right apex is a dimming / toning state in which the dimming ratio of the second light source unit 2 is set to 100% and the dimming ratio of the first light source unit 1 is set to the dimming lower limit (or off). It corresponds. Hereinafter, this state is referred to as a “warm color state”.

  Thus, in the triangular portion in FIG. 3, the dimming ratio of the first light source unit 1 and the dimming ratio of the second light source unit 2 are set to arbitrary values within a range where the total dimming ratio is 100% or more. It corresponds to the dimming and toning state. Further, the rectangular portion in FIG. 3 is a dimming in which the dimming ratio of the first light source unit 1 and the dimming ratio of the second light source unit 2 are set to arbitrary values within a range where the total dimming ratio is less than 100%. Supports light and toning conditions. An arbitrary position in the figure (pentagon) (including each side) combining the isosceles triangle and the rectangle corresponds to the dimming / toning state of the illumination light. That is, assuming a two-dimensional orthogonal coordinate system in which the toning ratio is the horizontal axis (x-axis) and the total dimming ratio is the vertical axis (y-axis), an arbitrary position inside the pentagon, that is, an arbitrary dimming / The toning state can be represented by a point where the toning ratio is the x coordinate and the total dimming ratio is the y coordinate. For example, the coordinates of the position indicated by □ in FIG. 3 are represented as (60, 150).

  Here, since the control unit 5 processes the dimming ratios of the light sources 1 and 2 as digital values, the light sources 1 and 2 are actually dimmed stepwise. However, the number of steps that can be dimmed is several tens to several hundreds of times as compared with the general step dimming performed in fluorescent lamp lighting fixtures.

  The remote control receiving unit 7 receives (receives) an infrared signal transmitted from a remote controller (hereinafter abbreviated as a remote controller) 200, and controls a control code (described later) demodulated from the received infrared signal. 5 is output. And the control part 5 controls the 1st lighting circuit part 3 and the 2nd lighting circuit part 4 so that it may become the total light control ratio and color control ratio corresponding to control code (light control command and color control command). The light control ratio of each light source unit 1 and 2 is adjusted. However, instead of the infrared signal, a radio signal using radio waves as a medium or an electric signal via a signal line may be transmitted from the remote controller 200.

  As shown in FIG. 4A, the remote controller 200 includes a control unit 201, an operation input unit 202, a light emitting element 203, a drive unit 204, a liquid crystal display unit 205, a power supply unit 206, and the like. The light emitting element 203 is a light source for transmitting an infrared signal, for example, an infrared light emitting diode, and emits (transmits) infrared (infrared signal) when a drive current is supplied from the drive unit 204. The operation input unit 202 has a plurality of pushbutton switches (not shown) that are turned on individually when a plurality of types of operation buttons described later are pressed, and each pushbutton switch is turned on when each pushbutton switch is turned on. An operation input corresponding to the switch is received and an operation signal is output to the control unit 201. The control unit 201 generates a control code (including a dimming command and a toning command) corresponding to the operation signal received from the operation unit 201 and outputs the control code to the drive circuit 204, or a character corresponding to the operation signal and the control code. Are displayed on the liquid crystal display unit 205. The control code is modulated in the drive circuit 204 and transmitted from the light emitting element 203 as an infrared signal. The power supply unit 206 supplies operating power to the units 201 to 205 using the battery as a power source.

  FIG. 4B shows an external view (front view) of the remote controller 200. The above-described portions 201 to 206 are housed in a case 210 made of a flat rectangular box-shaped synthetic resin molding. The display surface of the liquid crystal display unit 205 is exposed at the upper front of the case 210, and a plurality (13 in the illustrated example) for pressing and operating a plurality of pushbutton switches of the operation input unit 202 below the display surface Push buttons 211 to 223 are arranged.

  For example, of the two push buttons 218 and 219 provided at the center of the front surface of the case 210, when the upper push button 218 is pushed, a control code for increasing the total dimming ratio (dimming command <dimming Up command>) is generated. On the other hand, when the lower push button 219 is pressed, a control code (dimming command <dimming down command>) for reducing the total dimming ratio is generated. Further, when the push operation of the push buttons 218 and 219 is completed, a control code (dimming command <dimming stop command>) for stopping the increase and decrease of the total dimming ratio is generated. Then, the control unit 5 continuously increases or decreases all the dimming ratios without changing the toning ratio until receiving the dimming stop command after receiving the dimming up command or the dimming down command. Thus, the first lighting circuit unit 3 and the second lighting circuit unit 4 are controlled to adjust the dimming ratio of the light source units 1 and 2.

  In addition, when the left push button 220 of the two push buttons 220 and 221 arranged side by side at the lower front part of the case 210 is pressed, the toning ratio is lowered (the light color is made closer to cool color). A control code (toning command <toning down command>) is generated. On the other hand, when the right push button 221 is pressed, a control code (toning command <toning-up command>) for increasing the toning ratio (making the light color closer to the warm color) is generated. Further, when the pressing operation of the push buttons 220 and 221 is finished, a control code (a toning command <a toning stop command>) for stopping the increase and decrease of the toning ratio is generated. Then, the control unit 5 continuously increases or decreases only the toning ratio without changing the total dimming ratio until the toning stop command is received after the toning up command or the toning down command is received. Thus, the first lighting circuit unit 3 and the second lighting circuit unit 4 are controlled to adjust the dimming ratio of the light source units 1 and 2.

  Further, among the four push buttons 214 to 217 arranged side by side on the circumference so as to surround the two push buttons 218 and 219, when the upper push button 214 is pushed, the dimming / toning state is set to “all”. A control code for switching to the “lamp state” is generated. Also, when the left push button 215 is pressed, a control code for switching the light control / color control state to the “cool color state” is generated, and when the right push button 216 is pressed, the light control / color control state is generated. A control code for switching to “warm color state” is generated. Further, when the lower push button 217 is pressed, a control code for switching to the light adjustment / color adjustment state stored in the memory of the control unit 5 by the user is generated. That is, when any of these four push buttons 214 to 217 is pressed in any light control / color control state, the light control / color control state corresponding to each of the push buttons 214 to 217 (all lamp state, (Cool color state, warm color state, etc.). Therefore, the operability and usability can be improved as compared with the case where the pushbuttons 218 to 221 are pushed and set to the full light state, the cool color state, the warm color state, or the like. However, if a control code for switching to each dimming / toning state such as full light state, cool color state, warm color state, etc. is generated in order each time one push button is pressed, the push button The number can be reduced.

  In addition, when the central push button 212 of the three push buttons 211 to 213 arranged in the left-right direction is arranged directly below the liquid crystal display unit 205 on the front surface of the case 210, the dimming / toning state (all A control code for storing the dimming ratio and the toning ratio) in the memory of the control unit 5 is generated. Then, the control unit 5 that has received the control code stores the total dimming ratio and the toning ratio at that time in the memory, and when the control code generated by the push button 217 being pressed is received, Switch to the memorized dimming / toning state. Therefore, if the user stores any dimming / coloring state in advance, the dimming / coloring state is immediately reproduced simply by pressing the push button 217 of the remote controller 200. Usability can be improved. When a push button 222 disposed at the lowermost part of the front surface of the case 210 is pressed, a control code for turning off all the light source units 1 and 2 is generated.

  Next, the gist of the present invention, that is, the operation (process) of the control unit 5 for easily reproducing any light control / color control state will be described in detail with reference to FIG.

  Dimming / toning state in which the total dimming ratio is set to 100% or more, for example, dimming / toning state corresponding to the coordinate position of □ in FIG. 3 (hereinafter referred to as the first dimming / toning state) In this case, it is assumed that the control unit 5 receives a toning down command from the remote controller 200. Based on the toning down command, the control unit 5 stores the first dimming / toning state in the memory, and then decreases the first toning ratio without changing the total dimming ratio. The lighting circuit unit 3 and the second lighting circuit unit 4 are controlled. Here, when the dimming ratio of the first light source unit 1 reaches 100% while the toning ratio is decreasing, the control unit 5 maintains the dimming ratio of the first light source unit 1 at 100%. 2 Adjust (lower) only the dimming ratio of the light source section 2. That is, as indicated by a left-pointing broken line arrow in FIG. 3, only the toning ratio (x coordinate) can be changed without changing the total dimming ratio (y coordinate) until the hypotenuse of the triangle is reached. When the hypotenuse is reached, not only the toning ratio but also the total dimming ratio change along the hypotenuse. It is assumed that the dimming / toning state is finally stopped at an arbitrary position on the hypotenuse (referred to as the second dimming / toning state).

  Here, consider a case where the user presses the push button 216 of the remote controller 200 in order to increase the toning ratio from the second dimming / toning state. In this case, the control unit 5 that has received the toning control command from the remote controller 200 only gives the toning ratio without changing the total dimming ratio in the second dimming / toning state if priority is given to the toning control. What is necessary is just to control the 1st lighting circuit part 3 and the 2nd lighting circuit part 4 so that it may raise. However, when priority is given to the toning control as described above, only the toning ratio (x coordinate) changes without changing the total dimming ratio (y coordinate), as indicated by a two-dot broken line arrow in FIG. For this reason, it is impossible to return to the first dimming / toning state (first dimming / toning state).

  Therefore, in the present embodiment, the control unit 5 that has received the toning control command from the remote controller 200 prioritizes the dimming control and transitions from the first dimming / toning state to the second dimming / toning state. The first lighting circuit unit 3 and the second lighting circuit unit 4 are controlled so as to trace the history of the time in the reverse direction. That is, the dimming ratio of the first light source unit 1 and the second light source unit 2 so as to return to the first dimming / toning state (□ coordinate position) stored in the memory along the broken line arrow in FIG. Is adjusted. As described above, according to the present embodiment, when a toning command in the opposite direction to that in the case of transition from the first dimming / toning state to the second dimming / toning state is given, the control unit 5 Since each lighting circuit unit 3 and 4 is controlled so as to follow the history in the reverse direction from the first dimming / toning state to the second dimming / toning state, any toning and The dimming state can be reproduced, and the usability can be improved.

  By the way, the human sense of the change in brightness becomes sharper as it is darker (low light output), and becomes insensitive as it becomes brighter (higher light output). Therefore, the control unit 5 is lit so that the number of steps in step dimming is larger on the lower limit side (rectangular portion in FIG. 3) than on the upper limit side (triangular portion in FIG. 3) within the dimming range. It is preferable to control the circuit units 3 and 4. In the present embodiment, the number of steps on the lower limit side is set to about three times the number of steps on the upper limit side.

(Embodiment 2)
FIG. 5 shows a block diagram of the illumination device of this embodiment. The illumination device of the present embodiment is obtained by adding a brightness detection unit 8 that detects the brightness (illuminance) of the illumination space to the illumination device of Embodiment 1, and other configurations are the same as those of Embodiment 1. It is common.

  The brightness detection unit 8 includes a photoelectric conversion element such as a photodiode or a solar cell, and outputs an electrical signal (detection signal) of a level corresponding to the brightness (illuminance) of the illumination space to the control unit 5. When a push button 211 provided on the front surface of the case 210 of the remote controller 200 is pressed, the control unit 201 generates a control code for starting automatic light control, and transmits the control code using an infrared signal. When the push button 211 is pressed again, the control unit 201 generates a control code for ending the automatic light control, and transmits the control code using an infrared signal.

  The control unit 5 starts the automatic dimming control when receiving the control code for starting the automatic dimming control, ends the automatic dimming control when receiving the control code for ending the automatic dimming control, and during the automatic dimming control The lighting circuit units 3 and 4 are controlled so that the detection value of the brightness detection unit 8 matches the target value. When the control unit 5 receives a control code generated by pressing the push button 213 of the remote controller 200, the control unit 5 stores the detection value of the brightness detection unit 8 at that time in the memory as a target value.

  Next, automatic dimming control by the control unit 5 will be described in detail with reference to FIGS. As shown in FIG. 6, the control unit 5 sets the range of ± 5% around the target value as an allowable range, and controls the lighting circuit units 3 and 4 so that the detection value of the brightness detection unit 8 falls within the allowable range. Then, the dimming ratio of the light source units 1 and 2 is adjusted. For example, if the detected value exceeds the upper limit of the allowable range due to the influence of external light from the situation where the detected value matches the target value as indicated by ● (1) in FIG. The light quantity of the light source parts 1 and 2 is reduced by lowering the dimming ratio by controlling 3 and 4. At this time, the control unit 5 confirms whether or not the detection value of the brightness detection unit 8 falls within the allowable range after continuously reducing the total dimming ratio by a plurality of steps (for example, eight steps). Until the light falls within the allowable range, the decrease in the total dimming ratio and the confirmation of the detection value are repeated (see FIG. 7). Here, if the control unit 5 decreases or increases the total dimming ratio at a time by a plurality of steps at a time, the brightness of the illumination space may change intermittently, giving a sense of incongruity. It is preferable to continuously reduce the ratio by a plurality of stages.

  Thus, according to the present embodiment, the brightness of the illumination space can always be kept constant even when the brightness of the illumination space changes due to the influence of outside light (sunlight), so that the comfort is improved. Energy saving by reducing power consumption.

(Embodiment 3)
FIG. 8 is an exploded perspective view showing an embodiment of a lighting fixture using the lighting device of the first or second embodiment. The luminaire of this embodiment is a luminaire that is detachably attached to a hook ceiling (not shown) and arranged on the ceiling, and is generally called a ceiling light. However, the lighting fixture to which the technical idea of the lighting fixture according to the present invention can be applied is not limited to the ceiling light.

  The lighting fixture includes a fixture main body 10, a power feeding unit 11, four LED units 12, a light distribution panel 13, a cover 14, and the like. The instrument main body 10 is formed in a disk shape by a metal plate material, and a power feeding portion 11 that is electrically and mechanically detachably coupled to the hooking ceiling is disposed in the center portion. The LED unit 12 is configured by mounting a plurality of light emitting diodes arranged in two rows in an arc shape on a surface (lower surface) of a mounting substrate 12A that is curved in an arc shape. On the mounting substrate 12A of each LED unit 12, a cool light emitting diode constituting the first light source unit 1 and a warm light emitting diode constituting the second light source unit 2 are mixedly mounted. These four LED units 12 are attached to the lower surface of the instrument main body 10 in a circumferential direction centering on the power feeding unit 11.

  The light distribution panel 13 is formed in an annular shape from a light-transmitting synthetic resin such as acrylic resin or polycarbonate resin, and is fixed to the fixture body 10 so as to cover the lower surfaces of the four LED units 12. An optical component (lens) 13A for controlling the light distribution of the light emitted from the light emitting diodes is integrally formed at a portion of the light distribution panel 13 facing each light emitting diode.

  The cover 14 is made of a light-transmitting synthetic resin such as acrylic resin or polycarbonate resin, and is formed into a flat cylindrical shape with an open top surface so that the LED unit 12 and the light distribution panel 13 can be housed inside. Removably attached to the bottom surface of 10. However, the attachment structure of the cover 14 to the instrument main body 10 is a well-known structure in a general ceiling light, and thus detailed description thereof is omitted.

  In addition, among each part which comprises an illuminating device, the lighting circuit parts 3 and 4 except the light source parts 1 and 2, the control part 5, the power factor improvement circuit 6, etc. are the circumference | surroundings of the electric power feeding part 11 in the upper surface side of the instrument main body 10. Has been placed. The lighting device (power factor correction circuit 6) is supplied with power from a commercial AC power supply 100 by connecting a power supply line (not shown) to the power supply unit 11.

DESCRIPTION OF SYMBOLS 1 1st light source part 2 2nd light source part 3 1st lighting circuit part 4 2nd lighting circuit part 5 Control part

Claims (8)

First a first light source unit having one or a plurality of light emitting diodes emit light of a color temperature, wherein the first color temperature different from the second one to a plurality of light emitting diodes emit light of a color temperature A second light source unit including: a first lighting circuit unit that powers and lights the first light source unit; a second lighting circuit unit that powers and lights the second light source unit; and a toning provided from the outside A control unit that controls the first lighting circuit unit and the second lighting circuit unit based on the command and the dimming command to cause the first light source unit and the second light source unit to transition to an arbitrary dimming / coloring state; With
Wherein the control unit is configured so as to transition to the first second dimming-toning state from the dimming-toning state different from the first dimming-toning state of based on the toning Directive After controlling the 1 lighting circuit part and the 2nd lighting circuit part, the toning command in the opposite direction to the transition from the first dimming / toning state to the second dimming / toning state is When given, the first lighting circuit unit and the second lighting circuit are configured to trace the history when the first light control / color control state transitions to the second light control / color control state in the reverse direction. The lighting device characterized by controlling a part.   The control unit turns on the first light source unit at the upper limit of the dimming range and controls the second light source unit when a toning command for toning the light color of the first color temperature is given. The first lighting circuit unit and the second lighting circuit unit are controlled so as to be turned on or off at the lower limit of the range, and when a toning command for toning the light color of the second color temperature is given, Controlling the first lighting circuit unit and the second lighting circuit unit so that the second light source unit is turned on at the upper limit of the dimming range and the first light source unit is turned on or off at the lower limit of the dimming range; The first lighting circuit unit and the second lighting circuit so that both the first light source unit and the second light source unit are lit at the upper limit of the dimming range when a dimming command for dimming to a bright state is given. The lighting device according to claim 1, wherein the lighting device is controlled.   A remote controller for giving the light control command and the color control command to the control unit, and the remote controller has a push button to be pushed, and each time the push button is pushed, the first color temperature A toning command for toning light color, a toning command for toning to the light color of the second color temperature, and a dimming command for dimming to the brightest state are sequentially given to the control unit. The lighting device according to claim 2.   A storage unit that stores the dimming / coloring state; and the control unit stores the arbitrary dimming / coloring state in the storage unit, and the dimming / coloring stored in the storage unit The lighting device according to claim 1, wherein the first lighting circuit unit and the second lighting circuit unit are controlled so as to reproduce a state.   The lighting device according to claim 4, wherein the control unit causes the storage unit to store the dimming / toning state in accordance with a storage command given from outside.   The control unit controls the first lighting circuit unit and the second lighting circuit unit to dimm the first light source unit and the second light source unit, and the number of steps in the step dimming However, the first lighting circuit unit and the second lighting circuit unit are controlled so that the lower limit side is larger than the upper limit side within the dimming range. The lighting device according to item 1.   The control unit is configured to control the first lighting circuit unit and the second lighting circuit unit to dimm the first light source unit and the second light source unit, and the first light source unit and A brightness detection unit configured to detect brightness of an illumination space irradiated with light from the second light source unit; and the control unit is configured to match a detection value of the brightness detection unit with a target value. When controlling the lighting circuit unit and the second lighting circuit unit, the first lighting circuit unit and the second lighting unit are configured so that the first light source unit and the second light source unit are continuously dimmed in a plurality of stages. The lighting device according to claim 1, wherein the circuit unit is controlled.   A lighting fixture comprising: the lighting device according to any one of claims 1 to 7; and a fixture body that holds the lighting device.

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