JP7345271B2 - lighting equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to lighting equipment.

2. Description of the Related Art There is a known lighting device that lights up with the same light color when the power is turned on (when lighting starts) as the light color immediately before the power was turned off last time. For example, Patent Document 1 discloses a lighting fixture that lights up at the same color temperature as the color temperature immediately before the previous power off when the power switch is turned on after an off period of a predetermined time or more.

Japanese Patent Application Publication No. 2010-282757

However, the lighting fixture of Patent Document 1 cannot change the light color at the time of lighting start. Therefore, the light color at the start of lighting cannot be set to the light color desired by the user.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a lighting fixture that allows the user to set the light color at the start of lighting to a light color desired by the user.

The lighting equipment disclosed in this application can be turned on and off using an external switch. The lighting fixture includes a light source section, a storage section, and a control section. The light source selectively generates a plurality of types of light having different colors. The storage unit stores an initial light color. The initial light color indicates the light color of the light source section at the time of starting lighting. The control unit controls the lighting state of the light source unit so that the light color of the light source unit becomes the initial light color at the time of starting lighting. The control unit determines the initial light color from among the plurality of types of light colors according to a setting operation performed on the external switch. The control unit does not determine the initial light color when the number of executions of the setting operation is less than a first specified number of times, and determines the plurality of types when the number of executions of the setting operation is equal to or more than the first specified number of times. The initial light color is determined from among the light colors of the light. The control unit does not determine the initial light color when the number of executions of the setting operation exceeds a second specified number of times, and determines the initial light color when the number of executions of the setting operation is equal to or less than the second specified number of times. The initial light color is determined from among the light colors of the light. When the number of executions of the setting operation is the first specified number of times, the control unit determines a first light color associated with the first specified number of times as the initial light color. When the number of executions of the setting operation is the second specified number of times, the control unit determines a second light color associated with the second specified number of times as the initial light color.

In the lighting fixture disclosed in the present application, the control unit may determine the initial light color according to the setting operation performed after a first specified time has elapsed from the start of lighting.

In the lighting fixture disclosed in the present application, the control unit may determine the initial light color in accordance with the setting operation performed before a second specified time elapses from the start of lighting.

In the lighting fixture disclosed in the present application, the external switch receives a lighting operation for turning on the light source section and a turning-off operation for turning off the light source section. The setting operation may be an operation in which the lighting operation and the lighting operation are executed within a predetermined period of time.

In the lighting fixture disclosed in the present application, the control section may periodically change the amount of light emitted from the light source section in response to execution of the setting operation.

In the lighting fixture disclosed in this application, the control section may cause the light source section to blink in response to the execution of the setting operation.

According to the present invention, the light color at the start of lighting can be set to the light color desired by the user.

FIG. 1 is a block diagram of a lighting fixture according to Embodiment 1 of the present invention. It is a flowchart which shows the process performed by the control part of the lighting fixture based on Embodiment 1 of this invention. It is a flowchart which shows the decision processing performed by the control part of the lighting equipment concerning Embodiment 1 of the present invention. 1 is a schematic circuit diagram of a lighting fixture according to Embodiment 1 of the present invention. FIG. 3 is a diagram showing a light color table according to Embodiment 1 of the present invention. (a) to (d) are time charts showing lighting states of the light source unit according to Embodiment 1 of the present invention. It is a flowchart which shows the determination process performed by the control part of the lighting fixture based on Embodiment 2 of this invention. It is a flowchart which shows another example of the determination process performed by the control part of the lighting fixture based on Embodiment 2 of this invention. FIG. 3 is a block diagram of a lighting system according to another embodiment of the invention.

Embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited to the following embodiments. Note that the description may be omitted as appropriate for parts where the description overlaps. Further, in the figures, the same or corresponding parts are given the same reference numerals and the description will not be repeated.

[Embodiment 1]
First, with reference to FIG. 1, a lighting fixture 100 of this embodiment will be described. FIG. 1 is a block diagram of a lighting fixture 100 according to this embodiment.

As shown in FIG. 1, the lighting fixture 100 is connected to an external AC power source A via an external switch S. The lighting fixture 100 lights up based on power supplied from an AC power source A via an external switch S. The lighting fixture 100 is, for example, a hanging light (for example, a pendant light), a direct-ceiling light (for example, a ceiling light), a recessed light (for example, a downlight), or a direct-to-wall light (for example, a bracket light). It may be either.

The external switch S is, for example, a wall switch. The user can turn on and off the lighting fixture 100 by operating the external switch S. Specifically, when the external switch S is turned on, power is supplied from the AC power source A to the lighting fixture 100, and the lighting fixture 100 lights up. Furthermore, when the external switch S is turned off, the power supplied from the AC power source A to the lighting fixture 100 is cut off, and the lighting fixture 100 is turned off. Therefore, the operation of turning on the external switch S is an operation of turning on the lighting fixture 100, and the operation of turning off the external switch S is an operation of turning off the lighting fixture 100. Hereinafter, the operation of turning on the external switch S may be referred to as a "lighting operation", and the operation of turning off the external switch S may be referred to as a "lighting-off operation".

The lighting fixture 100 of this embodiment includes a rectifier circuit 110, a smoothing circuit 120, a constant current circuit 130, a control section 140, a storage section 150, and a light source section 200.

The rectifier circuit 110 rectifies the AC voltage supplied from the AC power supply A. The rectified AC voltage is input to the smoothing circuit 120 and the control section 140. The smoothing circuit 120 smoothes the rectified alternating current voltage. Therefore, the rectifier circuit 110 and the smoothing circuit 120 convert the AC voltage supplied from the AC power supply A into a DC voltage. In other words, rectifier circuit 110 and smoothing circuit 120 generate DC voltage based on AC voltage. The DC voltage is input to constant current circuit 130. Constant current circuit 130 generates a constant current based on the DC voltage input from smoothing circuit 120. The constant current generated by the constant current circuit 130 is supplied to the light source section 200.

The light source section 200 generates light based on the constant current supplied from the constant current circuit 130. More specifically, the light source section 200 selectively generates multiple types of light having different colors. In other words, the light source section 200 can change the color of the light generated from the light source section 200. The light source unit 200 of this embodiment selectively generates light of a first color, light of a second color, and light of a third color. In other words, the light source section 200 can change the light color between the first light color, the second light color, and the third light color. The light of the first light color is, for example, light with a correlated color temperature of 2700 Kelvin (warm color). The light of the second light color is, for example, light with a correlated color temperature of 3500 Kelvin (intermediate color). The light of the third light color is, for example, light with a correlated color temperature of 5000 Kelvin (cold color). Specifically, the light source section 200 includes a plurality of light sources that generate light having mutually different correlated color temperatures. Each of the plurality of light sources has one or more light emitting elements. By adjusting the mixing ratio of light emitted from multiple light sources, the color of light can be changed. For example, the light source unit 200 includes a first light source that generates light (first light color) with a correlated color temperature of 2,700 Kelvin, and a second light source that generates light (light of a third light color) with a correlated color temperature of 5,000 Kelvin. and a light source. Light of the first light color is generated by lighting only the first light source among the first light source and the second light source. Light of the second light color is generated by lighting the first light source and the second light source. Light of the third light color is generated by lighting only the second light source among the first light source and the second light source.

The control unit 140 controls the constant current circuit 130. More specifically, the control unit 140 controls the constant current circuit 130 to generate a current having a predetermined constant current value.

Further, the control unit 140 controls the lighting state of the light source unit 200 in accordance with a switching operation performed on the external switch S. Specifically, control unit 140 determines whether a switching operation has been performed based on the rectified AC voltage input from rectifier circuit 110. When the control unit 140 determines that the switching operation has been performed, the control unit 140 controls the color of the light generated from the light source unit 200.

Specifically, in response to the switching operation, the control unit 140 changes the light color of the light generated from the light source unit 200 into “first light color,” “second light color,” and “second light color,” according to a predetermined order. Switch to one of the three light colors. In this embodiment, the control unit 140 switches the light color of the light generated from the light source unit 200 in the order of “first light color,” “second light color,” and “third light color.” When the switching operation is performed when the light color is the "third light color," the control unit 140 switches the light color to the "first light color."

The switching operation indicates an operation in which a light-off operation and a light-on operation are performed within a first predetermined period of time. Specifically, the switching operation refers to an operation in which the external switch S is switched from an on state to an off state and then further switched to an on state within a first predetermined time period. The first predetermined time is, for example, 0.7 seconds or more and 1.5 seconds or less. The switching operation is sometimes referred to as a "pullless operation." The control unit 140 determines whether the external switch S has been switched from an off state to an on state within a first predetermined time period, for example, by counting the number of pulses of a synchronization signal or a clock signal.

Control unit 140 includes, for example, a microcomputer. A microcomputer includes, for example, a microprocessor and at least one semiconductor memory. The semiconductor memory is, for example, RAM (Random Access Memory).

The storage unit 150 stores initial light color information 151. The initial light color information 151 indicates the light color of the light source section 200 when the lighting fixture 100 (or the light source section 200) starts lighting. That is, the initial light color information 151 indicates the light color of light generated from the light source section 200 at the time of starting lighting. When the lighting fixture 100 starts lighting, the control unit 140 refers to the initial light color information 151 and controls the lighting state of the light source unit 200 so that the light color of the light source unit 200 becomes the initial light color. That is, the control unit 140 controls the lighting state of the light source unit 200 so that the light color of the light generated from the light source unit 200 becomes the initial light color. More specifically, when the external switch S is turned on after a second predetermined time period or more has elapsed since the external switch S was turned off, light of the initial light color is generated from the light source section 200. The second predetermined time indicates a longer time than the first predetermined time. The second predetermined time is, for example, 4 seconds.

Storage unit 150 includes, for example, nonvolatile memory. The nonvolatile memory is, for example, EEPROM (Electrically Erasable Programmable Read-Only Memory) (registered trademark).

The control unit 140 further determines an initial light color from among a plurality of types of light colors in accordance with a setting operation performed on the external switch S. Here, the multiple types of light colors indicate the colors of multiple types of light selectively generated from the light source section 200. More specifically, the control unit 140 determines the initial light color from among the "first light color", "second light color", and "third light color" according to the setting operation. If the determined light color is different from the light color of the initial light color information 151, the control unit 140 changes the light color of the initial light color information 151 to the determined light color.

In the present embodiment, the setting operation is a switching operation that is performed after the first specified time T1 has elapsed and before the second specified time T2 has elapsed from the time when the lighting fixture 100 starts lighting. The control unit 140 has a timer function and starts counting the time t in response to the start of lighting of the lighting fixture 100. The time t indicates the elapsed time from the start of lighting. Hereinafter, time t may be referred to as "elapsed time t." The control unit 140 refers to the elapsed time t and defines a switching operation that is performed after the first prescribed time T1 has elapsed and before the second prescribed time T2 has elapsed from the time when the lighting fixture 100 starts lighting as a "setting operation". judge. The first specified time T1 is, for example, 5 seconds. The second specified time T2 is, for example, 10 seconds.

Here, the process of determining the initial light color will be explained. In this embodiment, the control unit 140 determines the initial light color according to the number n of executions of the setting operation. Specifically, the control unit 140 determines the initial light color to be the "first light color" when the number of times n of performing the setting operation is N1 times, and when the number of times n of performing the setting operation is N2 times, If the initial light color is determined to be the "second light color" and the number of times n of execution of the setting operation is N3, the initial light color is determined to be the "third light color". "N1", "N2", and "N3" indicate mutually different positive integers. N1 times is, for example, three times. N2 times is, for example, 4 times. N3 times is, for example, 5 times. Note that N1 times is an example of the first specified number of times, and N3 times is an example of the second specified number of times.

Next, the processing executed by the control unit 140 will be described with reference to FIGS. 1 to 3. FIG. 2 is a flowchart showing processing executed by the control unit 140 of the lighting fixture 100 according to the present embodiment. The process shown in FIG. 2 starts when the power is turned on. Specifically, after the second predetermined time (for example, 4 seconds) has elapsed since the external switch S was turned off, the external switch S is turned on, and the supply of power from the AC power supply A to the lighting fixture 100 is started. In response to this, the process shown in FIG. 2 starts. Note that the process shown in FIG. 2 ends after a second predetermined time has elapsed since the external switch S was turned off.

As shown in FIG. 2, when the power is turned on, the control unit 140 operates the constant current circuit 130 to start lighting the light source unit 200 (step S1). At this time, the control unit 140 controls the lighting state of the light source unit 200 so that light of the initial light color set in the initial light color information 151 is generated.

When the control unit 140 starts lighting the light source unit 200, it activates a timer function and starts counting the elapsed time t (step S2). Note that in the present embodiment, the control unit 140 stops counting the elapsed time t after the second specified time T2 has elapsed from the time when the lighting fixture 100 starts lighting. Further, the count value of the elapsed time t is reset when the power is turned off. Specifically, after the second predetermined time has elapsed since the external switch S was turned off, the count value of the elapsed time t is reset.

When the control unit 140 starts counting the elapsed time t, it determines whether a switching operation has been performed (step S3). If the control unit 140 determines that the switching operation has not been performed (No in step S3), the process returns to step S3. When the control unit 140 determines that the switching operation has been performed (Yes in step S3), the control unit 140 determines whether the elapsed time t is smaller than the first specified time T1 or whether the elapsed time t is larger than the second specified time T2. is determined (step S4). In other words, the control unit 140 determines whether the elapsed time t is greater than or equal to the first specified time T1 and less than or equal to the second specified time T2.

If the control unit 140 determines that the elapsed time t is smaller than the first specified time T1, or if it determines that the elapsed time t is larger than the second specified time T2 (Yes in step S4), the control unit 140 changes the light color. switching (step S5). In other words, when the control unit 140 determines that the elapsed time t is not greater than or equal to the first specified time T1 and less than or equal to the second specified time T2, the control unit 140 switches the light color.

Specifically, if the elapsed time t is smaller than the first specified time T1, or if the elapsed time t is larger than the second specified time T2, the switching operation received in step S3 is a normal switching operation. , the control unit 140 switches the light color according to the switching operation. For example, if the current light color is the "first light color", the control unit 140 switches the light color to the "second light color".

If the control unit 140 determines that the elapsed time t is not smaller than the first specified time T1 and that the elapsed time t is not larger than the second specified time T2 (No in step S4), the control unit 140 determines the number of times the setting operation is performed. Start counting n (step S6). In other words, when the control unit 140 determines that the elapsed time t is greater than or equal to the first specified time T1 and less than or equal to the second specified time T2, the control unit 140 starts counting the number n of executions of the setting operation.

Specifically, if the elapsed time t is not smaller than the first specified time T1 and the elapsed time t is not larger than the second specified time T2, the switching operation received in step S3 causes the lighting fixture 100 to turn on. Since the switching operation (setting operation) was executed after the first specified time T1 has elapsed and before the second specified time T2 has elapsed from the start, the control unit 140 classifies the switching operation received in step S3 as "first time". setting operation" and counts up the count value of the number of times n of execution of the setting operation to "1". Note that in this embodiment, the control unit 140 does not switch the light color when the setting operation is executed.

When the control unit 140 starts counting the number n of executions of the setting operation, it executes the determination process described with reference to FIG. 3 (step S6). The determination process is a process of determining the initial light color. After the determination process is executed, the process returns to step S3.

Next, the determination process will be explained with reference to FIG. FIG. 3 is a flowchart showing a determination process executed by the control unit 140 of the lighting fixture 100 according to the present embodiment.

As shown in FIG. 3, upon starting the determination process, the control unit 140 determines whether a switching operation has been performed (step S71). When the control unit 140 determines that the switching operation has been executed (Yes in step S71), the control unit 140 counts up the number n of executions of the setting operation (step S72). When the control unit 140 counts up the count value n of the number of executions of the setting operation, it determines whether the elapsed time t is greater than the second specified time T2 (step S73). Further, when the control unit 140 determines that the switching operation has not been performed (No in step S71), the control unit 140 determines whether the elapsed time t is longer than the second specified time T2 (step S73).

If the control unit 140 determines that the elapsed time t is not longer than the second specified time T2 (No in step S73), the process returns to step S71. That is, the process of step S71 is repeated until the elapsed time t becomes longer than the second specified time T2. As a result, the number n of switching operations (setting operations) performed after the first specified time T1 has elapsed and before the second specified time T2 has elapsed since the lighting of the lighting fixture 100 was started is counted.

When the control unit 140 determines that the elapsed time t is longer than the second specified time T2 (Yes in step S73), the control unit 140 determines whether the number n of executions of the setting operation is N1 (step S74). If the control unit 140 determines that the number n of executions of the setting operation is N1 (Yes in step S74), the control unit 140 determines the initial light color to be the "first light color" (step S75). Then, the control unit 140 determines whether the light color of the initial light color information 151 is the "first light color." When the control unit 140 determines that the light color of the initial light color information 151 is the "first light color", the process returns to step S3 shown in FIG. 2. When the control unit 140 determines that the light color of the initial light color information 151 is not the "first light color", the control unit 140 changes the light color of the initial light color information 151 to the "first light color". When the control unit 140 changes the light color of the initial light color information 151 to the "first light color", the process returns to step S3 shown in FIG. 2.

When the control unit 140 determines that the number n of executions of the setting operation is not N1 times (No in step S74), it determines whether the number n of executions of the setting operation is N2 times (step S76). When the control unit 140 determines that the number of times n of execution of the setting operation is N2 (Yes in step S76), the control unit 140 determines the initial light color to be the "second light color" (step S77). Then, the control unit 140 determines whether the light color of the initial light color information 151 is the "second light color." When the control unit 140 determines that the light color of the initial light color information 151 is the "second light color", the process returns to step S3 shown in FIG. 2. When the control unit 140 determines that the light color of the initial light color information 151 is not the "second light color", the control unit 140 changes the light color of the initial light color information 151 to the "second light color". When the control unit 140 changes the light color of the initial light color information 151 to the "second light color", the process returns to step S3 shown in FIG. 2.

If the control unit 140 determines that the number n of executions of the setting operation is not N2 times (No in step S76), it determines whether the number n of executions of the setting operation is N3 (step S78). When the control unit 140 determines that the number of executions n of the setting operation is N3 (Yes in step S78), the control unit 140 determines the initial light color to be the "third light color" (step S79). Then, the control unit 140 determines whether the light color of the initial light color information 151 is the "third light color." When the control unit 140 determines that the light color of the initial light color information 151 is the "third light color", the process returns to step S3 shown in FIG. 2. When the control unit 140 determines that the light color of the initial light color information 151 is not the "third light color", the control unit 140 changes the light color of the initial light color information 151 to the "third light color". When the control unit 140 changes the light color of the initial light color information 151 to the "third light color", the process returns to step S3 shown in FIG. 2.

In this embodiment, if the control unit 140 determines that the number of times n of executions of the setting operation is not N3 (No in step S78), the process returns to step S3 shown in FIG. 2. In other words, the control unit 140 does not determine the initial light color when the number n of executions of the setting operation is less than N1 times (less than the first prescribed number of times). Further, the control unit 140 does not determine the initial light color when the number of times n of performing the setting operation exceeds N3 times (second specified number of times). Note that the execution order of each process in step S74, step S76, and step S78 can be changed.

As described above with reference to FIGS. 1 to 3, according to this embodiment, the initial light color can be changed. Therefore, the light color at the start of lighting can be set to the light color desired by the user.

Further, according to the present embodiment, the setting operation is the same operation as the switching operation. Therefore, the user does not need to perform any special operations to set the initial light color.

Further, according to the present embodiment, the control unit 140 determines that a switching operation performed after the first specified time T1 has elapsed and before the second specified time T2 has elapsed from the time when the lighting fixture 100 starts lighting is a setting operation. do. Therefore, it is possible to limit the period during which setting operations are accepted. Therefore, even if the setting operation and the switching operation are the same operation, the control unit 140 can distinguish between the setting operation and the switching operation.

Further, according to the present embodiment, the control unit 140 determines the initial light color according to a switching operation performed after the first specified time T1 has elapsed since the lighting of the lighting fixture 100 started. In other words, the control unit 140 switches the light color according to a switching operation performed before the first specified time T1 has elapsed. Therefore, the user can switch the light color by performing a switching operation (pullless operation) immediately after turning on the power. As a result, the user can switch the light color without waiting for the second specified time T2 to elapse.

Note that in the present embodiment, the setting operation is a switching operation that is performed after the first specified time T1 has elapsed and before the second specified time T2 has elapsed from the time when the lighting fixture 100 starts lighting. T1 may be omitted. In other words, the setting operation may be a switching operation performed before the second specified time T2 elapses after the lighting fixture 100 starts lighting. Even if the first specified time T1 is omitted, the period during which the setting operation is accepted can be limited, so even if the setting operation and the switching operation are the same operation, the control unit 140 can separate the setting operation and the switching operation. can be determined.

Next, with reference to FIG. 4, the lighting fixture 100 of this embodiment will be further described. FIG. 4 is a schematic circuit diagram of the lighting fixture 100 according to this embodiment. First, with reference to FIG. 4, the rectifier circuit 110, smoothing circuit 120, storage section 150, and light source section 200 will be described.

As shown in FIG. 4, the rectifier circuit 110 includes a full-wave rectifier circuit 111. Further, the smoothing circuit 120 includes a diode 121 and a capacitor 122. Capacitor 122 is, for example, an electrolytic capacitor. Note that the rectifier circuit 110 is not limited to the full-wave rectifier circuit 111. Rectifier circuit 110 may be a half-wave rectifier circuit. Further, in the smoothing circuit 120, the diode 121 may be omitted.

The storage unit 150 stores a light color table 170. The initial light color information 151 described with reference to FIG. 1 is stored in the light color table 170. Specifically, as will be described later with reference to FIG. 5, first setting information 172 is stored as initial light color information 151 in the light color table 170.

The light source section 200 includes a first light source 210 and a second light source 220. The first light source 210 emits light of a first color. The first light source 210 has one or more light emitting elements 211. FIG. 4 illustrates two light emitting elements 211 connected in series. The second light source 220 emits light of a third color. The second light source 220 has one or more light emitting elements 221. FIG. 4 illustrates two light emitting elements 221 connected in series. For example, the first light source 210 and the second light source 220 have white LEDs (Light Emitting Diodes) as light emitting elements 211 and 221. The first light source 210 and the second light source 220 are, for example, SMD (surface mount device) elements or COB (chip on board) elements.

Next, the lighting fixture 100 will be further described with reference to FIG. 4. As shown in FIG. 4, the lighting fixture 100 further includes a switch section 160. The switch section 160 switches the lighting state of the light source section 200. Specifically, the switch section 160 is controlled by the control section 140 to switch the color of the light generated from the light source section 200.

The switch section 160 includes a first switch 161 and a second switch 162. The first switch 161 is connected in series with the first light source 210. The first switch 161 is, for example, an Nch MOSFET. Similarly, the second switch 162 is connected in series with the second light source 220. The second switch 162 is, for example, an Nch MOSFET. Note that both the first switch 161 and the second switch 162 are not limited to Nch MOSFETs. The first switch 161 and the second switch 162 may be, for example, Pch MOSFETs.

The control unit 140 controls the first switch 161 and the second switch 162. Specifically, when the light source section 200 generates light of the first color, the control section 140 turns on the first switch 161 and turns off the second switch 162. As a result, a constant current is supplied only to the first light source 210 of the first light source 210 and the second light source 220, the first light source 210 is turned on, the second light source 220 is turned off, and the first light color is Light is generated from the light source section 200. Further, when the light source section 200 generates light of the third color, the control section 140 turns the first switch 161 into an OFF state and turns the second switch 162 into an ON state. As a result, a constant current is supplied only to the second light source 220 of the first light source 210 and the second light source 220, the second light source 220 is turned on, the first light source 210 is turned off, and the third light color is Light is generated from the light source section 200.

When the light source section 200 generates light of the second light color, the control section 140 controls the first switch 161 and the second switch so that the first light source 210 and the second light source 220 are turned on alternately at a predetermined period. 162. Specifically, the control unit 140 turns on the first switch 161 and the second switch 162 alternately at a predetermined period. As a result, a constant current is alternately supplied to the first light source 210 and the second light source 220, and the first light source 210 and the second light source 220 are alternately turned on. In this case, to the human eye, the lighting fixture 100 appears to emit light of an intermediate color between the first light color and the second light color.

Next, the light color table 170 will be explained with reference to FIGS. 4 and 5. FIG. 5 is a diagram showing a light color table 170 according to this embodiment.

As shown in FIG. 5, light color information 171 and first setting information 172 are stored in the light color table 170. The light color table 170 associates light color information 171 with first setting information 172. The first setting information 172 corresponds to the initial light color information 151.

The light color information 171 indicates "first light color", "second light color", and "third light color". The first setting information 172 indicates the initial light color. Specifically, the first setting information 172 includes three first flags associated with each of "first light color," "second light color," and "third light color." Among the three first flags, the first flag associated with the light color set as the initial light color is on (for example, "1"), and the other first flags are off (for example, "1"). 0”). That is, the control unit 140 turns on the first flag associated with the light color set as the initial light color. Therefore, the first flag, which is turned on, changes in response to the execution of the setting operation. For example, when the setting operation is performed three times, the control unit 140 turns on the first flag associated with the first light color and turns off the other first flags. FIG. 5 illustrates that the second light color is set to the initial light color.

Further, second setting information 173 is further stored in the light color table 170. The light color table 170 further associates the light color information 171 with the second setting information 173. The second setting information 173 indicates the current light color. Specifically, the second setting information 173 includes three second flags associated with each of "first light color," "second light color," and "third light color." Among the three second flags, the second flag associated with the current light color is turned on (for example, "1"), and the other second flags are turned off (for example, "0"). . That is, the control unit 140 turns on the flag associated with the current light color. Therefore, the second flag, which is turned on, changes in response to the execution of the switching operation. FIG. 5 illustrates that the third light color is the current light color.

Next, the lighting state of the light source section 200 of this embodiment will be described with reference to FIG. 4 and FIGS. 6(a) to 6(d). FIGS. 6A to 6D are time charts showing lighting states of the light source section 200 according to this embodiment. Specifically, FIG. 6A shows the lighting state of the first light source 210 and the second light source 220 during the first light color period. The first light color period indicates a period during which light of the first light color is generated from the light source section 200. FIG. 6(b) shows the lighting state of the first light source 210 and the second light source 220 during the third light color period. The third light color period indicates a period during which light of the third light color is generated from the light source section 200. FIG. 6C shows the lighting states of the first light source 210 and the second light source 220 during the second light color period. The second light color period indicates a period during which light of the second light color is generated from the light source section 200. FIG. 6(d) is a partially enlarged view of FIG. 6(c).

As shown in FIG. 6A, during the period in which the light of the first color is generated from the light source section 200, the first light source 210 is lit and the second light source 220 is turned off. As shown in FIG. 6B, during the period when the light source unit 200 is emitting light of the third color, the first light source 210 is off and the second light source 220 is on.

As shown in FIG. 6C, the first light source 210 and the second light source 220 are turned on alternately during the period in which the light of the second light color is generated from the light source section 200. Specifically, as shown in FIGS. 6(c) and 6(d), in this embodiment, the second light color period includes a first monochrome period T11, an overlapping period Tw, and a second monochrome period T12. include. The first monochromatic period T11 indicates a period in which the first light source 210 is turned on and the second light source 220 is turned off. The overlapping period Tw indicates a period in which both the first light source 210 and the second light source 220 are lit. The second monochromatic period T12 indicates a period in which the first light source 210 is turned off and the second light source 220 is turned on.

When the light source unit 200 generates light of the second light color, the control unit 140 controls the first switch 161 and the first switch so that the first monochromatic period T11, the overlapping period Tw, and the second monochromatic period T12 are sequentially switched. 2 switch 162. Specifically, the control unit 140 controls the first monochrome period T11, the overlap period Tw, and the second monochrome period in the order of "first monochrome period T11," "overlapping period Tw," and "second monochrome period T12." The first switch 161 and the second switch 162 are controlled so that the period T12 is repeated.

According to this embodiment, a period in which both the first light source 210 and the second light source 220 are turned off is less likely to occur during the second light color period. Therefore, flicker can be suppressed even when an image is captured by the imaging device under the illumination of the lighting fixture 100.

Embodiment 1 of the present invention has been described above with reference to FIGS. 1 to 5 and FIGS. 6(a) to 6(d). Note that in the present embodiment, the control unit 140 did not switch the light color when the setting operation was performed, but the control unit 140 may switch the light color according to the setting operation (switching operation).

[Embodiment 2]
Next, a second embodiment of the present invention will be described with reference to FIGS. 1, 7, and 8. However, matters that are different from Embodiment 1 will be explained, and explanations of matters that are the same as Embodiment 1 will be omitted. Embodiment 2 differs from Embodiment 1 in the lighting state of the light source unit 200 at the time of execution of the determination process.

FIG. 7 is a flowchart showing a determination process executed by the control unit 140 of the lighting fixture 100 according to the present embodiment. Note that in FIG. 7, steps S74 to S79 described with reference to FIG. 3 are omitted. The determination process shown in FIG. 7 differs from the determination process described with reference to FIG. 3 in that step S81 and step S82 are added.

As shown in FIG. 7, when the control unit 140 starts the determination process, it starts blinking the light generated from the light source unit 200 (step S81). Specifically, the control section 140 controls the constant current circuit 130 to periodically change the current value of the constant current supplied to the light source section 200. As a result, the amount of light emitted from the light source section 200 changes periodically, and the light emitted from the light source section 200 flickers. In other words, the light generated from the light source section 200 (lighting fixture 100) becomes brighter or darker.

When the control unit 140 determines that the elapsed time t is longer than the second specified time T2 (Yes in step S73), the control unit 140 ends the blinking of the light generated from the light source unit 200 (step S82). Specifically, the control unit 140 controls the constant current circuit 130 so that the current value of the constant current supplied to the light source unit 200 becomes a predetermined constant value. As a result, the amount of light emitted from the light source section 200 becomes constant, and the light emitted from the light source section 200 does not flicker. When the control unit 140 finishes blinking the light generated from the light source unit 200, the control unit 140 determines whether the number n of executions of the setting operation is N1, as described with reference to FIG. 3 (step S74). ).

Next, another example of the determination process of this embodiment will be described with reference to FIGS. 1 and 8. FIG. 8 is a flowchart showing another example of the determination process executed by the control unit 140 of the lighting fixture 100 according to the present embodiment. In the determination process shown in FIG. 7, the light emitted from the light source unit 200 repeatedly blinks until the elapsed time t becomes longer than the second specified time T2, but in the determination process shown in FIG. The light flickers a number of times corresponding to n. Note that in FIG. 8, steps S74 to S79 described with reference to FIG. 3 are omitted. The determination process shown in FIG. 8 differs from the determination process described with reference to FIG. 3 in that step S91 and step S92 are added.

As shown in FIG. 8, upon starting the determination process, the control unit 140 starts a process of blinking the light generated from the light source unit 200 once (step S91). Specifically, the control unit 140 causes the light to flicker a number of times corresponding to the count value n of the number of times the setting operation is performed. As described with reference to FIG. 2, at the start of the determination process, the count value of the number of executions n of the setting operation is "1", so when the control unit 140 starts the determination process, the light source unit 200 The light blinks once.

When the control unit 140 counts up the count value of the number of times n of executions of the setting operation (step S72), it starts a process of blinking the light the number of times corresponding to the count value of the number of times n of executions of the setting operation (step S92). Then, it is determined whether the elapsed time t is longer than the second specified time T2 (step S73).

Embodiment 2 of the present invention has been described above with reference to FIGS. 1, 7, and 8. According to this embodiment, when the setting operation is executed, the light generated from the light source section 200 (lighting fixture 100) flickers. Therefore, by blinking the light, it is possible to notify the user that the initial light color setting (setting operation) is being accepted.

Note that in the present embodiment, the control unit 140 periodically changes the amount of light generated from the light source unit 200 in response to the execution of the setting operation. The light source section 200 may be made to blink periodically depending on the situation. That is, the control unit 140 may periodically blink the light generated from the light source unit 200. Specifically, when the setting operation is executed, the light source section 200 may periodically turn on and off.

Furthermore, in the present embodiment, when the control unit 140 starts the determination process, it periodically changes the amount of light generated from the light source unit 200, but when determining the initial light color, the control unit 140 The amount of light generated from the light source section 200 may be changed periodically. Alternatively, the control unit 140 may cause the light generated from the light source unit 200 to blink when determining the initial light color. Specifically, the control unit 140 may cause the light generated from the light source unit 200 to flicker or blink after the processing in step S74, step S76, or step S78 described with reference to FIG. When determining the initial light color, by blinking or flashing the light generated from the light source section 200, it is possible to notify the user that the initial light color setting has been completed.

The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above-described embodiments, and can be implemented in various forms without departing from the spirit thereof.

For example, in the embodiment of the present invention, a configuration in which one lighting fixture 100 is connected to one external switch S has been described, but as shown in FIG. 9, a plurality of lighting fixtures 100 are connected to one external switch S. may be done. FIG. 9 is a block diagram of a lighting system 300 according to another embodiment of the invention. Although FIG. 9 illustrates a configuration in which three lighting fixtures 100 are connected to one external switch S, the number of lighting fixtures 100 connected to one external switch S may be two. The number may be four or more.

Further, in the embodiment of the present invention, the period during which setting operations are accepted is limited, but the period during which setting operations are accepted does not need to be limited. For example, the execution interval of setting operations may be limited. For example, the control unit 140 determines that a switching operation performed after the first specified time T1 has elapsed since the lighting of the lighting fixture 100 starts, as the first setting operation, and a predetermined period of time has elapsed since the execution of the first setting operation. A switching operation performed before the time elapses may be determined as a second setting operation. In this case, the control unit 140 determines that the setting operation has been performed only once if the switching operation is not performed within a predetermined period of time after the first setting operation is performed.

Further, in the embodiment of the present invention, the setting operation is a switching operation that is performed after the first specified time T1 has elapsed and before the second specified time T2 has elapsed from the time when the lighting fixture 100 starts lighting. The operation is not limited to a switching operation. For example, in the setting operation, the light-off operation and the light-on operation are performed within a predetermined time period that is different from the first predetermined time period (for example, 0.7 seconds or more and 1.5 seconds or less) that is set for the switching operation. It may be an operation that For example, the setting operation may be an operation in which the external switch S is switched from an on state to an off state and then further switched to an on state within a time period of 1.6 seconds or more and 2 seconds or less. If the setting operation is different from the switching operation, the period during which the setting operation is accepted may not be limited.

Furthermore, in the embodiment of the present invention, the light source unit 200 selectively generates three types of light of different light colors (light of the first light color, light of the second light color, and light of the third light color). However, the light source unit 200 may selectively generate two types of light with different colors, or four or more types of light with different colors. For example, the light source unit 200 may selectively generate light with a correlated color temperature of 2700 Kelvin (warm color) and light with a correlated color temperature of 5000 Kelvin (cold color).

Further, in the embodiment of the present invention, the initial light color information 151 indicates the color of light generated by the light source unit 200 at the time of starting lighting, but the initial light color information 151 indicates the color of light generated by the light source unit 200 at the time of starting lighting. It may also indicate the correlated color temperature of the light.

Further, in the embodiment of the present invention, the initial light color information 151 and the light color table 170 are stored in the storage unit 150, but the initial light color information 151 and the light color table 170 are stored in the memory (storage unit) of the control unit 140. may be stored in In this case, the storage unit 150 may be omitted.

Further, in the embodiment of the present invention, the control unit 140 does not determine the initial light color when the number of executions n of the setting operation is less than N1 times (less than the first specified number of times); The initial light color may be determined when the number n of executions of the setting operation is less than N1 times (less than a first specified number of times). For example, the control unit 140 may determine the initial light color to be the "first light color" when the number n of executions of the setting operation is less than N1 times (less than the first specified number of times). In other words, the control unit 140 may determine the initial light color to be the "first light color" when the number of executions n of the setting operation is equal to or less than N1 times.

Further, in the embodiment of the present invention, the control unit 140 does not determine the initial light color when the number of executions n of the setting operation exceeds N3 times (second specified number of times); The initial light color may be determined when the number of executions n exceeds N3 times (second specified number of times). For example, the control unit 140 may determine the initial light color to be the "third light color" when the number of times n of performing the setting operation exceeds N3 times (second specified number of times). In other words, the control unit 140 may determine the initial light color to be the "third light color" when the number of executions n of the setting operation is N3 or more.

The present invention is useful in the field of lighting equipment.

100 Lighting equipment 140 Control unit 150 Storage unit 151 Initial light color information (initial light color)
200 Light source part A AC power supply S External switch T1 First prescribed time T2 Second prescribed time n Number of executions t Elapsed time

Claims (6)

A lighting fixture that can be turned on and off using an external switch,
a light source unit that selectively generates multiple types of light with mutually different light colors;
a storage unit that stores an initial light color indicating a light color of the light source unit at the time of starting lighting;
and a control unit that controls the lighting state of the light source unit so that the light color of the light source unit becomes the initial light color at the time of starting lighting,
The control unit determines the initial light color from among the plurality of types of light colors according to a setting operation performed on the external switch,
The control unit does not determine the initial light color when the number of executions of the setting operation is less than a first specified number of times, and determines the plurality of types when the number of executions of the setting operation is equal to or more than the first specified number of times. determining the initial light color from among the light colors of the light;
The control unit does not determine the initial light color when the number of executions of the setting operation exceeds a second specified number of times, and determines the initial light color when the number of executions of the setting operation is equal to or less than the second specified number of times. determining the initial light color from among the light colors of the light;
The control unit determines, as the initial light color, a first light color associated with the first specified number of times when the number of executions of the setting operation is the first specified number of times;
The control unit is a lighting fixture, wherein when the number of executions of the setting operation is the second specified number of times, the control unit determines a second light color associated with the second specified number of times as the initial light color. The lighting fixture according to claim 1, wherein the control unit determines the initial light color according to the setting operation performed after a first specified time has elapsed from the start of lighting. The lighting fixture according to claim 1 or 2, wherein the control unit determines the initial light color according to the setting operation performed before a second specified time elapses from the start of lighting. The external switch receives a lighting operation for turning on the light source section and a turning off operation for turning off the light source section,
The lighting fixture according to any one of claims 1 to 3, wherein the setting operation is an operation in which the lighting operation and the lighting operation are executed within a predetermined period of time. The lighting fixture according to any one of claims 1 to 4 , wherein the control unit periodically changes the amount of light generated from the light source unit in response to the execution of the setting operation. . The lighting fixture according to any one of claims 1 to 4 , wherein the control unit blinks the light source unit in response to the execution of the setting operation.

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