Lighting device and time setting method for lighting device

Abstract

To provide a lighting device that performs lighting based on circadian rhythm at low cost and to easily install the lighting device.SOLUTION: A lighting device includes a light source electrically connected to a power source via a switch, and a control unit that changes the color temperature and light amount of the light emitted from the light source over time on the basis of a circadian rhythm. The control unit sets a time for controlling the color temperature and light amount based on the circadian rhythm according to the number of times the switch is operated within a predetermined period of time.SELECTED DRAWING: Figure 4B

Description

[Technical field]

[0001] The present invention relates to a lighting device and a method for setting a time for a lighting device. [Background technology]

[0002] Among conventional lighting devices, there are those that provide lighting based on the so-called circadian rhythm, in which the ratio of light emitted by a first light-emitting device and light emitted by a second light-emitting device, which have different color temperatures, is changed according to the time of day (for example, Patent Document 1).

[0003] Furthermore, some lighting devices that provide illumination based on circadian rhythms are equipped with a dedicated remote control device that changes the amount of light of a specific color temperature emitted from the light-emitting device and changes the lighting time. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2021-182566 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, when a dedicated remote control device is provided for a lighting device that provides lighting based on circadian rhythms, or when a dedicated wired control system is introduced, problems arise in that the initial setup costs are high and installation of the lighting device becomes complicated due to the cost of the dedicated device and the need for a worker with specialized knowledge to perform the initial setup.

[0006] The present invention has been made in consideration of the above, and aims to provide a lighting device that provides illumination based on circadian rhythms at a low cost and to make it easy to install the lighting device. [Means for solving the problem]

[0007] In order to solve the above problems and achieve the object, the lighting device according to the present invention includes a light source electrically connected to a power source via a switch, and a control unit that changes the color temperature and light amount of the light emitted from the light source over time based on a circadian rhythm. The control unit sets a time for controlling the color temperature and light amount based on the circadian rhythm according to the number of times the switch is operated within a predetermined period of time.

[0008] According to one aspect of the lighting device of the present invention, a lighting device that provides illumination based on circadian rhythms can be provided at low cost, and the introduction of the lighting device can be simplified. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a block diagram of a lighting system including a lighting device according to an embodiment. [Diagram 2] FIG. 2 is a graph showing the relationship between wavelength and relative value regarding the visual spectral sensitivity characteristics and the visual spectral sensitivity characteristics of the eye sensor that affect biological rhythms. [Diagram 3] FIG. 3 is a graph showing an example of control based on the circadian rhythm performed by the lighting device M shown in FIG. [Figure 4A] FIG. 4A is a flowchart (1) of the setting process performed by the control circuit. [Figure 4B] FIG. 4B is a flowchart (2) of the setting process performed by the control circuit. [Figure 4C] FIG. 4C is a flowchart (3) of the setting process performed by the control circuit. [Diagram 5] FIG. 5 is a graph showing the relationship between time and the rectified voltage on the input side of the power factor correction circuit applied within the lighting device when the morning mode is set. [Figure 6] FIG. 6 is a graph showing the relationship between time and the rectified voltage applied to the input side of the power factor correction circuit in the lighting device when the night mode is set. [Figure 7]FIG. 7 is a graph showing the relationship between time and the rectified voltage on the input side of the power factor correction circuit applied within the lighting device when adjusting the time addition immediately after setting the morning mode or night mode. [Figure 8] FIG. 8 is a graph showing the relationship between time and the rectified voltage on the input side of the power factor correction circuit applied within the lighting device when adjusting the time subtraction immediately after setting the morning mode or night mode. [Figure 9] FIG. 9 is a flowchart of the reset mode process performed by the control circuit. [Figure 10] FIG. 10 is a graph showing the relationship between the rectified voltage at the input side of the power factor correction circuit applied in the lighting device and time in the reset mode. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The lighting device M according to the embodiment will be described in detail below with reference to the drawings. The dimensional relationship and ratio of each element in the drawings may differ from the reality. The dimensional relationship and ratio may differ between the drawings.

[0011] [Embodiment] 1 is a block diagram of a lighting system 1 including a lighting device M according to an embodiment. The lighting system 1 according to the embodiment includes an AC power supply ACI1, a switch I2, and a lighting device M, for example.

[0012] An AC (alternating current power supply) I1 supplies power to the lighting device M and is electrically connected to a switch I2. The switch I2 is electrically connected to a PFC (power factor correction) M1 and is also electrically connected to an AC voltage detection circuit M5, which will be described later. The switch I2 is provided on a wall of a facility such as an office, a school, or a hospital, and is switched on and off by a pressing operation. By turning on the switch I2, light is emitted from an LED module M4, which will be described later, to light up the lighting device M, and by turning off the switch I2, the emission of light from the LED module M4 is stopped to turn off the lighting device M.

[0013] The lighting device M is installed, for example, on the ceiling of the facility described above, and includes a PFC (power factor correction) circuit M1, a first DC / DC converter M2, a second DC / DC converter M3, and an LED module M4.

[0014] The PFC (power factor correction circuit) M1 is a circuit that brings the power factor of the AC (alternating current power supply) I1 closer to 1, and is electrically connected to the first DC / DC converter M2 and also electrically connected to the second DC / DC converter M3. The PFC (power factor correction circuit) M1 rectifies the input AC voltage to a DC voltage on the input side, and converts the DC voltage to a DC voltage of a predetermined voltage on the output side and outputs it. Note that the PFC (power factor correction circuit) M1 according to this embodiment may be provided with an insulating circuit or may be a non-insulated circuit system.

[0015] The first DC / DC converter M2 is a circuit that converts the DC voltage input from the PFC (power factor correction circuit) M1 into a voltage required to light the multiple first light sources M41 and outputs a predetermined current to the light sources M41. The first DC / DC converter M2 is electrically connected to the first light sources M41.

[0016] The second DC / DC converter M3 is a circuit that converts the DC voltage input from the PFC (power factor correction circuit) M1 into a voltage required to light the second light sources M42 and outputs a predetermined current to the light sources M42. The second DC / DC converter M3 is electrically connected to the second light sources M42.

[0017] The LED module M4 includes a plurality of light sources LS, which are arranged, for example, in two dimensions, vertically and horizontally. The light sources LS of the LED module M4 according to this embodiment are, for example, configured with a plurality of first light sources M41 that emit cool color light and a plurality of second light sources M42 that emit warm color light. For example, the LED module M4 is an LED module in which a plurality of first light sources M41 and a plurality of second light sources M42 are mounted on a board. In other words, the LED module M4 includes a plurality of light sources LS that are electrically connected to an AC (alternating current power source) I1 via a switch I2 and can emit cool color light and warm color light. The cool color light emitted from the first light source M41 is, for example, a daylight color of 6500K, and the warm color light emitted from the second light source M42 is, for example, an incandescent color of 2700K.

[0018] The lighting device M also includes an AC voltage detection circuit M5, a control circuit (controller) M6, a timer circuit M7, and a power storage unit M8.

[0019] The AC voltage detection circuit M5 is a circuit that detects whether power is being supplied to the downstream side of the switch I2 when the AC (alternating current power supply) I1 is on the upstream side, and whether power supply to the downstream side of the switch I2 is cut off. The AC voltage detection circuit M5 is electrically connected to the control circuit M6.

[0020] The control circuit M6 has a function of comprehensively controlling each unit of the lighting device M according to this embodiment. The control circuit M6 is electrically connected to the first DC / DC converter M2, electrically connected to the second DC / DC converter M3, electrically connected to the timer circuit M7, and electrically connected to the power storage unit M8.

[0021] The control circuit M6 has a judgment control unit 21, a mode control unit 22, an adjustment unit 23, a storage unit 24, and a drive control unit 25. The control circuit M6 is realized by a computer including a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), an input / output interface, an internal bus, and the like.

[0022] The determination control unit 21 has a function of selecting the morning mode, the night mode, or the reset mode according to the number of times of the off-on operation.

[0023] The mode control unit 22 has a function of controlling the execution of processes in the above three modes (morning, night, reset). The mode control unit 22 also has a function of controlling the selection of a mode (circadian mode, color temperature fixed modes 1 and 2) in the reset mode described below. Furthermore, the mode control unit 22 transfers the execution process to the adjustment unit 23 when the time adjustment mode of the morning mode or night mode is selected. Moreover, the mode control unit 22 transfers the execution process to the adjustment unit 23 even when the circadian mode of the reset mode is selected. When the color temperature fixed mode of the reset mode is selected, the mode control unit 22 instructs the drive control unit 25 to output a fixed color temperature.

[0024] In the time adjustment mode, the adjustment unit 23 adjusts the shift time of the circadian rhythm time. When the circadian mode in the reset mode is selected, the adjustment unit 23 resets (returns to the initial setting state) the shift time of the circadian rhythm time.

[0025] The storage unit 24 stores various data. The storage unit 24 includes a first storage unit 241 and a second storage unit 242. The first storage unit 241 stores circadian rhythm information, which is various data such as data related to dimming and color adjustment of a 24-hour (one day) schedule of a circadian rhythm, which will be described later. The second storage unit 242 stores data related to the time set as the start time and the adjusted time difference (so-called shift time).

[0026] The drive control unit 25 has a function of driving a plurality of light sources LS. More specifically, the drive control unit 25 adjusts the color temperature (toning) by adjusting the ratio between the current value of the first light source M41 to be turned on and the current value of the second light source M42 to be turned on. The drive control unit 25 also adjusts the light quantity (luminous flux quantity) (dimming) by adjusting the sum of the current value of the first light source M41 to be turned on and the current value of the second light source M42 to be turned on. For example, the drive control unit 25 can adjust the color and dimming by adjusting the sum of the current value of the first light source M41 to be turned on and the current value of the second light source M42 to be turned on after setting the ratio to a desired color temperature. The current value adjustment method may be either a PWM control method or an amplitude control method.

[0027] Through this control, the control circuit M6 changes the color temperature and light amount of the light emitted from the LED module M4 over time based on a circadian rhythm described below. Specifically, the control circuit M6 changes the amount of cool color light and the amount of warm color light emitted from the LED module M4 over time based on a circadian rhythm described below. More specifically, the control circuit M6 changes the color temperature of the light emitted from the LED module M4 (i.e., adjusts the color) and changes the amount of light emitted from the LED module M4 (i.e., adjusts the light) depending on the time of day.

[0028] The timer circuit M7 is, for example, a configuration of a crystal oscillator and a microcomputer or an RTC (Real Time Clock) element, and has a function of continuing to keep time on the timer circuit M7 even when the power supply from the AC (alternating current power supply) I1 is cut off. Then, as described below, the control circuit M6 stores the adjusted time difference between the time set as the first time in the time zone of the first mode (morning mode) or the second time in the time zone of the second mode (night mode), and reflects it on the timer circuit M7. In the following description, the morning mode is an example of the first mode, and the night mode is an example of the second mode.

[0029] The power storage unit M8 is, for example, an electric double layer capacitor (supercapacitor), and can store electricity while electrically connected to the AC (alternating current power source) I1. After storing electricity, when the power supply from the AC (alternating current power source) I1 is cut off, the power storage unit M8 can supply power to the timer circuit M7 via the control circuit M6. In other words, the lighting device M includes the power storage unit M8 that supplies power to the timer circuit M7 continuously for, for example, about 10 days when the power supply from the AC (alternating current power source) I1 is cut off. The timer circuit M7 is not reset by the power storage unit M8 even when the AC power source I1 is turned on after being turned off for a moment.

[0030] Next, the circadian rhythm will be described with reference to Fig. 2 and Fig. 3. Fig. 2 is a graph showing the relationship between wavelength and relative value regarding the spectral sensitivity characteristic of vision and the spectral sensitivity characteristic of the vision of the eye sensor that affects biological rhythms. Fig. 3 is a graph showing an example of control based on the circadian rhythm performed by the lighting device M shown in Fig. 1.

[0031] Circadian rhythm is a 24-hour cycle that exists in living organisms, and is also called circadian rhythm. The human circadian rhythm is slightly longer than 24 hours, which can cause disruptions to daily rhythms, but sunlight or light from lighting devices M, etc., can adjust the human circadian rhythm to 24 hours, allowing humans to live according to the same rhythm.

[0032] As shown by the dashed line in Figure 2, the spectral sensitivity of vision has a peak at approximately 555 nm. On the other hand, as shown by the solid line in Figure 2, the spectral sensitivity of the eye, which affects the circadian rhythm, has a peak at 480 nm. The synchronization of the biological clock by light can only be achieved in the suprachiasmatic nucleus, and the mechanism is that when nerve cells in the retina of the eye are exposed to light of 480 nm and several thousand lux, the signal is carried to the suprachiasmatic nucleus of the hypothalamus, and this signal causes the Per1 gene transcription to be enhanced, thereby regulating the biological clock. It is known that the main biological clock keeps a 24-hour cycle in the suprachiasmatic nucleus. More specifically, light with short wavelengths such as cool colors has a large effect on the circadian rhythm, so when cool color light is insufficient in the morning, exposure to cool color light can efficiently compensate for the cool color light. Taking these factors into consideration, the lighting device M of this embodiment, as shown in FIG. 3, emits more short-wavelength cool color light from the LED module M4 than long-wavelength warm color light in the morning (first time period), and emits more long-wavelength warm color light from the LED module M4 than short-wavelength cool color light in the evening (second time period), thereby adjusting the human circadian rhythm to 24 hours.

[0033] Moreover, the lighting device M according to this embodiment changes the amount of light (i.e., luminous flux value) emitted from the LED module M4 according to the time of day while changing the color temperature according to the time of day, as shown in Fig. 3. Therefore, the LED module M4 according to this embodiment adjusts the human circadian rhythm to 24 hours by changing the color temperature (color adjustment) and the amount of light (dimming) according to the time of day.

[0034] Next, a 24-hour (one day) schedule example of the circadian rhythm performed by the lighting device M according to this embodiment will be described with reference to Fig. 3. The lighting device M according to this embodiment shows a case where the starting point is, for example, 6 o'clock.

[0035] At 6 o'clock, the control circuit M6 causes the LED module M4 to emit light having a color temperature of about 2700K and an amount of light that is 30% of the maximum amount of light emitted by the LED module M4.

[0036] The control circuit M6 controls the LED module M4 to emit light such that the color temperature changes from 2700K to 5000K and the light intensity of the LED module M4 changes from 30% to 100% between 6:00 and 10:00.

[0037] The control circuit M6 controls the LED module M4 to emit light such that the color temperature is maintained at 5000K and the amount of light emitted from the LED module M4 is maintained at 100% from 10:00 to 13:30.

[0038] The control circuit M6 controls the LED module M4 to emit light such that the color temperature changes from 5000 K to 2700 K from 1:30 pm to 8:30 pm. After 8:30 pm, the control circuit M6 controls the LED module M4 to emit light such that the color temperature is maintained at 2700 K until 6:00 am the following morning.

[0039] The control circuit M6 controls the LED module M4 to emit light so that the amount of light emitted from the LED module M4 is maintained at 100% from 1:30 pm to 2:30 pm. The control circuit M6 controls the LED module M4 to emit light so that the amount of light emitted from the LED module M4 changes from 100% to 30% from 2:30 pm to 9:30 pm. The control circuit M6 also controls the LED module M4 to emit light so that the amount of light emitted from the LED module M4 is maintained at 30% until 6:00 am the following morning after 9:30 pm. In other words, the control circuit M6 controls the LED module M4 to emit light so that the amount of light emitted from the LED module M4 is minimized after 9:30 pm.

[0040] 3, when the lighting device M emits light from the LED module M4 based on the circadian rhythm, the light source M41 emitting cool color light predominates in the morning, and the current-time product flowing through the light source M42 emitting warm color light is smaller than that of the light source M41 emitting cool color light. At night, the light source M42 emitting warm color light predominates, but the amount of light emitted from the LED module M4 is smaller than in the morning, so the current-time product of the light source M41 emitting cool color light throughout the day is larger than that of the light source M42 emitting warm color light.

[0041] It is known that the current-time product affects the lifespan of the LED (i.e., the light source LS). In other words, the larger the current-time product, the sooner the LED will reach the end of its life.

[0042] In the LED module M4, if the number of light sources M41 emitting cool color light is the same as the number of light sources M42 emitting warm color light, and if the maximum color temperature in the circadian rhythm and the color temperature characteristics of the light sources M41 emitting cool color light are the same, the light sources M41 emitting cool color light will approach the end of their life sooner, and the luminous flux value of the light source M41 emitting cool color light will decrease before the end of the life of the light source M42 emitting warm color light, making it impossible for the lighting device M to provide lighting based on the circadian rhythm.

[0043] Therefore, the light source M41 emitting cool color light and the light source M emitting warm color light of the LED module M4 of this embodiment are set so that their daily current-hour products are the same.

[0044] Specifically, when the number of light sources M41 emitting cool color light is the same as the number of light sources M42 emitting warm color light, the color temperature characteristic of the light source M41 emitting cool color light is set higher than the maximum color temperature in the circadian rhythm. In Fig. 3, the maximum color temperature in the circadian rhythm is 5000K, so for example, the color temperature characteristic of the light source M41 emitting cool color light is set to 6500K. For example, by using light sources of 6500K and 2700K and adjusting the color of the LED light source at a current ratio of 65:35 (cool color: warm color), it is possible to emit light of 5000K. By increasing the color temperature of the light source M41 that emits cool color light above the maximum color temperature in the circadian rhythm, the balance of the current values ​​flowing through the light source M41 that emits cool color light and the light source M42 that emits warm color light can be changed when light based on the circadian rhythm is emitted from the LED module M4. As a result, the daily current-time product of the light source M41 that emits cool color light and the light source M42 that emits warm color light can be adjusted to be the same, and the lifespan of the lighting device M can be extended.

[0045] As described above, the lighting device M according to this embodiment automatically changes the color temperature (color adjustment) and light amount (dimming) according to the time of day using the control circuit M6, and adjusts the human circadian rhythm to 24 hours by emitting light from the LED module M4 that is similar to that experienced under sunlight.

[0046] Next, the setting process performed by the control circuit M6 will be described with reference to Figures 4A, 4B, and 4C. Figures 4A, 4B, and 4C are flowcharts of the setting process performed by the control circuit M6.

[0047] First, the control circuit M6 judges whether or not the switch I2 has been operated (step S01). If the operation of the switch I2 has not been detected (step S01: No), the control circuit M6 waits until the operation of the switch I2 is detected, whereas if the operation of the switch I2 is detected (step S01: Yes), the control circuit M6 proceeds to step S02.

[0048] Next, the control circuit M6 judges whether the time of the morning mode or the night mode has not been adjusted (step S02). If the time of the morning mode or the night mode has been adjusted (step S02: No), the control circuit M6 performs a judgment process for the reset mode process described below. On the other hand, if the time of the morning mode or the night mode has not been adjusted (step S02: Yes), the control circuit M6 proceeds to step S03.

[0049] Next, the control circuit M6 judges whether the switch I2 has been operated to set a mode (step S03). Specifically, the control circuit M6 detects the number of times the switch I2 has been turned on and off during a predetermined time period to judge what mode setting has been selected. If the number of times the switch I2 has been turned on and off during a predetermined time period is three (step S03:B), the control circuit M6 proceeds to step 11 shown in FIG. 4B. If the number of times the switch I2 has been turned on and off during a predetermined time period is four (step S03:C), the control circuit M6 proceeds to step S31 shown in FIG. 4C. If the number of times the switch I2 has been turned on and off during a predetermined time period is neither three nor four (step S03:A), the control circuit M6 returns to step 01.

[0050] Next, a case where the switch I2 is turned on and off three times during a predetermined time period (step S03: B) and the mode transitions to the morning mode will be described with reference to Fig. 4B. The control circuit M6 proceeds to set the morning mode (step S11), and then starts displaying an answerback indicating that the morning mode has been set (turning on the first light source M41, which is a cool color, for 30 seconds) (step S12).

[0051] Next, the control circuit M6 judges whether or not the switch I2 is turned on or off during a predetermined time (30 seconds) that is the lighting time of the answerback (step S13). If the control circuit M6 detects the switch I2 being turned on or off (step S13: Yes), it transitions to the time adjustment mode (step S14) and stops the display of the answerback (turns off the first light source M41 of cool colors). On the other hand, if the control circuit M6 does not detect the switch I2 being turned on or off (step S13: No), it proceeds to step S23.

[0052] When the time adjustment mode is entered, the control circuit M6 starts a stopwatch and determines whether a predetermined time (e.g., 3 minutes) has not elapsed (step S15). If the stopwatch indicates that the predetermined time has not elapsed (step S15: Yes), the control circuit M6 proceeds to step S16. On the other hand, if the stopwatch indicates that the predetermined time has not elapsed, that is, if the predetermined time has elapsed (step S15: No), the control circuit M6 proceeds to step S23.

[0053] If the predetermined time has not elapsed as determined by the stopwatch, the control circuit M6 performs an off-on pulse determination (step S16). More specifically, if the switch I2 has been turned off and on once, the control circuit M6 proceeds to step S17, and if the switch I2 has been turned off and on twice, the control circuit M6 proceeds to step S20.

[0054] In step S17, the control circuit M6 delays the time of the first period by one hour (step S17), and to indicate that the time has been delayed, for example, displays an answerback by turning on the second light source M42 once every two seconds (step S18), and subtracts one hour from the first period of the morning mode, that is, adjusts the time to be delayed by one hour (step S19).Then, the control circuit M6 returns to step S15 and determines whether a predetermined time (for example, three minutes) has not yet elapsed.

[0055] Here, in step S16, if the switch I2 is turned on and off twice, the control circuit M6 advances the time of the first period by one hour (step S20), and to indicate that the time has been advanced, for example, displays an answerback by turning on the first light source M41 twice in three seconds (step S21), and adds one hour to the first period of the morning mode, that is, adjusts the time to advance by one hour (step S22).Then, the control circuit M6 returns to step S15 and determines whether or not a predetermined time (for example, three minutes) has not elapsed.

[0056] Here, when a predetermined time has elapsed on the stopwatch (step S15: No), the control circuit M6 determines the first time period of the morning mode (step S23).

[0057] Next, the control circuit M6 stores the time set as the start time and the adjusted time difference, adjusts the time to reflect this in the time on the timer circuit M7 (step S24), and then ends this setting process.

[0058] Next, a case where the switch I2 is turned on and off four times during the predetermined time (step S03:C) and the night mode is entered will be described with reference to Fig. 4C. The control circuit M6 proceeds to set the night mode (step S31), and then starts displaying an answerback (turning on the warm-colored second light source M42 for 30 seconds) indicating that the night mode has been entered (step S32).

[0059] Next, the control circuit M6 judges whether or not the switch I2 is turned on or off during a predetermined time (30 seconds) that is the lighting time of the answerback (step S33). If the control circuit M6 detects the switch I2 being turned on or off (step S33: Yes), it transitions to the time adjustment mode (step S34) and stops the display of the answerback (turns off the warm-colored second light source M42). On the other hand, if the control circuit M6 does not detect the switch I2 being turned on or off, it proceeds to step S43 (step S33: No).

[0060] When the time adjustment mode is entered, the control circuit M6 starts a stopwatch and determines whether a predetermined time (e.g., 3 minutes) has not elapsed (step S35). If the stopwatch indicates that the predetermined time has not elapsed (step S35: Yes), the control circuit M6 proceeds to step S36. On the other hand, if the stopwatch indicates that the predetermined time has not elapsed, that is, if the predetermined time has elapsed (step S35: No), the control circuit M6 proceeds to step S43.

[0061] If the predetermined time has not elapsed as determined by the stopwatch, the control circuit M6 performs an off-on pulse determination (step S36). More specifically, if the switch I2 has been turned off and on once, the control circuit M6 proceeds to step S37, and if the switch I2 has been turned off and on twice, the control circuit M6 proceeds to step S40.

[0062] In step S37, the control circuit M6 delays the second time by one hour (step S37), and to indicate that the time has been delayed, for example, displays an answerback by turning on the second light source M42 once every two seconds (step S38), and subtracts one hour from the second time in the night mode, that is, adjusts the time to be delayed by one hour (step S39).Then, the control circuit M6 returns to step S35 and determines whether or not a predetermined time (for example, three minutes) has not elapsed.

[0063] Here, in step S36, if the switch I2 is turned on and off twice, the control circuit M6 advances the time of the second time by one hour (step S40), and to indicate that the time has been advanced, for example, displays an answerback by turning on the first light source M41 twice in three seconds (step S41), and adds one hour to the second time in the night mode, that is, adjusts the time to advance by one hour (step S22).Then, the control circuit M6 returns to step S35 and determines whether or not a predetermined time (for example, three minutes) has not elapsed.

[0064] Next, the control circuit M6 stores the time set as the start time and the adjusted time difference, adjusts the time to reflect this in the time on the timer circuit M7 (step S44), and then ends this setting process.

[0065] Next, a morning mode in which the color temperature and the time for controlling the light amount based on the circadian rhythm in a first time period are set in the lighting device M, and a night mode in which the color temperature and the time for controlling the light amount based on the circadian rhythm in a second time period are set will be described.

[0066] Next, the setting of the morning mode and the setting of the night mode performed by the control circuit M6 will be described with reference to Fig. 5 and Fig. 6. Fig. 5 is a graph showing the relationship between time and the rectified voltage applied to the input side of the power factor correction circuit (PFC) M1 in the lighting device M when the morning mode is set. Fig. 6 is a graph showing the relationship between time and the rectified voltage applied to the input side of the power factor correction circuit (PFC) M1 in the lighting device M when the night mode is set.

[0067] The morning mode is a mode in which the color temperature and the light amount control time based on the circadian rhythm are set starting from the first time in the first time period, and the night mode is a mode in which the color temperature and the light amount control time based on the circadian rhythm are set starting from the second time in the second time period. In the lighting system 1 according to the present embodiment, the first time period is, for example, from 8:00 to 20:00, and the second time period is, for example, from 20:00 to 8:00, and half of the 24 hours is set as the first time period, and the remaining half of the 24 hours is set as the second time period. Of course, the third and fourth modes may be added to divide the 24 hours into four, but for the sake of easy understanding, the morning mode and the night mode will be described here with the start time of the morning mode time period as the first time period and the start time of the night mode time period as the second time period.

[0068] Here, the setting of the morning mode shown in FIG. 5 corresponds to the processing of step S03:B in FIG. 4A, and the setting of the night mode shown in FIG. 6 corresponds to the processing of step S03:C in FIG. 4A.

[0069] The control circuit M6 sets at least the morning mode or the night mode as an initial setting when the switch I2 is turned off and on a preset number of times during a preset time T1. More specifically, when the switch I2 is turned off and on within a preset short period of time, the control circuit M6 detects the on / off operation of the switch I2 by the AC voltage detection circuit M5, since the power supply state and the cut-off state from the AC (alternating current power source) I1 are switched, and recognizes it as an input operation by the user based on that. The control circuit M6 according to this embodiment recognizes it as an input operation by the user based on a combination of the period during which power is supplied from the AC (alternating current power source) I1 and the period during which the power supply from the AC (alternating current power source) I1 is cut off through the AC voltage detection circuit M5 based on the operation of the switch I2.

[0070] The morning mode is, for example, a setting for morning (first time period) as an initial setting performed in the lighting system 1, and the night mode is, for example, a setting for night (second time period) as an initial setting performed in the lighting system 1.

[0071] For example, when the switch I2 is turned off for the first time while power is being supplied from the AC (alternating current) power source I1, the control circuit M6 transitions to a selection mode for a preset time T1 from when the switch I2 is turned off. In this embodiment, the preset time T1 for the selection mode is, for example, 5 seconds.

[0072] The control circuit M6 transitions to the morning mode when the switch I2 is turned off and on three times while power is being supplied from the AC (alternating current power supply) I1, as shown in Fig. 5. In other words, the control circuit M6 transitions to the morning mode when, for example, a period during which power is supplied from the AC power supply I1 and a period during which the power supply from the AC power supply I1 is cut off alternately three times.

[0073] On the other hand, the control circuit M6 transitions to the night mode when the switch I2 is turned off and on four times repeatedly while power is being supplied from the AC power source I1, as shown in Fig. 6 for example. That is, the control circuit M6 transitions to the night mode when, for example, a period in which power is supplied from the AC (alternating current power source) I1 and a period in which the supply of power from the AC (alternating current power source) I1 is cut off alternately four times. Note that, as described later, the control circuit M6 transitions to the reset mode when a period in which power is supplied from the AC power source I1 and a period in which the supply of power from the AC power source I1 is cut off alternately five times. While the transition to the morning mode or night mode is the initial setting, the reset mode is a mode in which an operation to reset it is performed.

[0074] When the control circuit M6 recognizes the mode setting based on the user's on / off operation of the switch I2, it displays an output (answerback) corresponding to the mode by lighting a predetermined light source LS.

[0075] For example, when the morning mode is set based on the user's on / off operation of the switch I2, the control circuit M6 turns off all the light sources LS, turns on the first light source M41, and indicates that the morning mode is set by lighting cool color light from the first light source M41 for a maximum of 30 seconds. After that, the control circuit M6 lights up the light source LS with the color temperature and light amount corresponding to the set time.

[0076] On the other hand, when the night mode is set based on the user's on / off operation of the switch I2, the control circuit M6 turns off all the light sources LS, turns on the second light source M42, and indicates that the night mode is set by illuminating a warm color light from the second light source M42 for a maximum of 30 seconds. After that, the control circuit M6 turns on the light source LS with the color temperature and light amount corresponding to the set time.

[0077] Next, the above-mentioned adjustment of the time performed by the control circuit M6 immediately after the mode setting will be described with reference to Figs. 7 and 8. "Immediately after the mode setting" refers to, for example, within 30 seconds during the output (answerback) after the mode setting in the lighting system 1 according to this embodiment. If the switch I2 is not turned on or off even once within 30 seconds, the control circuit M6 determines that the time adjustment will not be performed and confirms it. Fig. 7 is a graph showing the relationship between time and the rectified voltage on the input side of the power factor correction circuit (PFC) M1 applied in the lighting device M when adjusting the time addition immediately after setting the morning mode or the night mode. Fig. 8 is a graph showing the relationship between time and the rectified voltage on the input side of the power factor correction circuit (PFC) M1 applied in the lighting device M when adjusting the time subtraction immediately after setting the morning mode or the night mode.

[0078] Here, the time adjustment immediately after the mode setting shown in Fig. 7 corresponds to performing the processes of steps S14 to S16 and steps S20 to S22 in Fig. 4B twice. For example, when switch I2 is turned off for the first time immediately after the morning mode is set and power is supplied from AC (alternating current power source) I1, control circuit M6 transitions to the time adjustment mode for a preset predetermined time T22 (three minutes in this embodiment) from when switch I2 is turned off (corresponding to steps S14 and S15 in Fig. 4B). In this embodiment, the predetermined time T22 for the time adjustment mode is, for example, three minutes.

[0079] Moreover, for example, when the switch I2 is turned off for the first time immediately after the morning mode is set, the control circuit M6 transitions to the operation reception mode (corresponding to step S16 in FIG. 4B) for a preset predetermined time T21 from when the switch I2 is turned off. In this embodiment, the predetermined time T21 of the operation reception mode is, for example, 2 seconds.

[0080] To advance the current time of the timer circuit M7 by one hour from the first time, the control circuit M6 adds one hour to the first time when, for example, the switch I2 is turned off and on twice during a predetermined time T21 (corresponding to steps S20 to S22 in FIG. 4B). That is, the control circuit M6 makes the current time of the timer circuit M7 one hour earlier than the first time when, for example, a period during which power is supplied from the AC (alternating current power source) I1 and a period during which the supply of power from the AC (alternating current power source) I1 is cut off alternately twice.

[0081] When the control circuit M6 recognizes an operation to advance the first time by one hour based on the user's off / on operation of the switch I2, it displays an output (answerback) corresponding to the operation by blinking and lighting a specified light source LS (corresponding to step S21 in FIG. 4B).

[0082] For example, when the control circuit M6 recognizes an operation to advance the first time by one hour based on the user's on / off operation of the switch I2, it turns off all the light sources LS and then turns on the first light source M41, which emits cool color light, by flashing it twice every three seconds for one set.

[0083] If the user wishes to set the time on the timer circuit M7 one hour ahead of the first time, the user repeats the above operation once. When the above operation is performed, the control circuit M6 determines that the time is two hours ahead of the first time and turns on the first light source M41, which emits cool color light, in two sets of blinks, each set being two blinks every three seconds.

[0084] When these operations are performed, the time on the timer circuit M7 is advanced by two hours from the first time of 8 o'clock, and the time on the timer circuit M7 is changed to 10 o'clock (corresponding to step S24 in FIG. 4B). Furthermore, in the lighting device M of this embodiment, the control circuit M6 stores the time difference between the time set as the first time and the current time on the timer circuit M7. For example, when the first time at the present time is 8 o'clock, the first time is set to 10 o'clock based on the above operation. Therefore, the time on the timer circuit M7 in the circadian rhythm control shown in FIG. 3 is the time obtained by adding two hours to the first time. In this way, the control circuit M6 changes the first time according to the number of operations of the switch I2 in a predetermined time immediately after setting the morning mode, and starts the control of the color temperature and the light amount based on the circadian rhythm, starting from the time after the stopwatch has started (the time after the predetermined time T22 has elapsed).

[0085] By the above operation, the second storage unit 242 stores 10 o'clock, which is set as the start time, and the adjusted time difference (so-called shift time), which is two hours, and the time on the timer circuit M7 is set to 10 o'clock. As a result, regardless of the current time, control based on the circadian rhythm begins from the current time with the color temperature and luminous flux ratio of 10 o'clock shown in Fig. 3. Also, if the morning mode is set and no time adjustment is performed, the time on the timer circuit M7 is set to 8 o'clock, and regardless of the current time, control based on the circadian rhythm begins from the current time with the color temperature and luminous flux ratio of 8 o'clock shown in Fig. 3.

[0086] Here, the time adjustment immediately after the mode setting shown in Fig. 8 corresponds to performing the processes of steps S34 to S39 in Fig. 4C twice. For example, as shown in Fig. 8, when the switch I2 is turned off for the first time immediately after the night mode is set and power is supplied from the AC (alternating current power source) I1, the control circuit M6 transitions to the time adjustment mode for a preset predetermined time T22 (three minutes in this embodiment) from when the switch I2 is turned off (corresponding to steps S34 and S35 in Fig. 4C). In this embodiment, the predetermined time T22 in the time adjustment mode is, for example, three minutes.

[0087] Moreover, for example, when the switch I2 is turned off for the first time immediately after the night mode is set, the control circuit M6 transitions to an operation reception mode (corresponding to step S36 in FIG. 4C) for a preset predetermined time T21 from when the switch I2 is turned off. In this embodiment, the predetermined time T21 of the operation reception mode is, for example, 2 seconds.

[0088] To delay the current time of the timer circuit M7 by one hour from the second time, the control circuit M6 subtracts one hour from the second time when, for example, the switch I2 is turned off and on once during the predetermined time T21 (corresponding to steps S37 to S39 in FIG. 4C). That is, the control circuit M6 delays the current time of the timer circuit M7 by one hour from the second time when, for example, there is one period in which power is supplied from the AC (alternating current power source) I1 and one period in which the supply of power from the AC (alternating current power source) I1 is cut off.

[0089] When the control circuit M6 recognizes an operation to delay the second time by one hour based on the user's off / on operation of the switch I2, it displays an output (answerback) corresponding to the operation by blinking and lighting a specified light source LS (corresponding to step S38 in FIG. 4C).

[0090] For example, when the control circuit M6 recognizes an operation to delay the second time by one hour based on the user's on / off operation of the switch I2, it turns off all the light sources LS and then turns on one set of the second light source M42 that emits warm color light, with one set being a blinking cycle once every two seconds.

[0091] If the user wishes to delay the time of the timer circuit M7 by one hour from the second time, the user repeats the above operation once. When the above operation is performed, the control circuit M6 turns on the second light source M42 that emits warm color light in two sets, with one set being a blinking once every two seconds, since the time has been delayed by two hours from the second time.

[0092] When these operations are performed, the time on the timer circuit M7 is delayed by two hours from the second time of 20:00, and the time on the timer circuit M7 is changed to 18:00 (corresponding to step S44 in FIG. 4C). Furthermore, in the lighting device M of this embodiment, the control circuit M6 stores the time difference between the time set as the second time and the current time of the timer circuit M7. For example, when the second time at the current time is 20:00, the second time is set to 18:00 based on the above operations. Therefore, the time on the timer circuit M7 in the circadian rhythm control shown in FIG. 3 is the time obtained by subtracting two hours from the second time. In this way, the control circuit M6 changes the second time according to the number of operations of the switch I2 in a predetermined time immediately after setting the night mode, and starts the control of the color temperature and the light amount based on the circadian rhythm, starting from the time after the stopwatch has started (the time after the predetermined time T22 has elapsed).

[0093] By the above operation, 18:00 set as the start time and the adjusted time difference (so-called shift time), 2 hours, are stored in the second storage unit 242, and the time on the timer circuit M7 is set to 18:00. As a result, regardless of the current time, control based on the circadian rhythm begins from the current time with the color temperature and luminous flux ratio of 18:00 shown in Fig. 3. Also, if the night mode is set and no time adjustment is performed, the time on the timer circuit M7 is set to 20:00, and regardless of the current time, control based on the circadian rhythm begins from the current time with the color temperature and luminous flux ratio of 20:00 shown in Fig. 3.

[0094] When delaying the first time, switch I2 is operated in the same manner as when delaying the second time described with reference to Fig. 8, and when advancing the second time, switch I2 is operated in the same manner as when advancing the first time described with reference to Fig. 7. Therefore, by performing the operations of Fig. 7 or Fig. 8 up to six times, the time can be adjusted in one-hour increments over 24 hours. The time can also be adjusted to an accuracy of within ±30 minutes of the true time.

[0095] Here, as described above, the control circuit M6 indicates, as an answerback, how many hours the first time has been changed by lighting a cool color light twice in three seconds or once in two seconds, and indicates how many hours the second time has been changed by lighting a warm color light twice in three seconds or once in two seconds,. Furthermore, the control circuit M6 sets the blinking pattern to two times in three seconds when the first time or the second time is advanced, and sets the blinking pattern to one time in two seconds when the first time or the second time is delayed. In other words, the control circuit M6 clearly changes the blinking pattern when the time is advanced and when the time is delayed.

[0096] In this way, when the first time or the second time is changed, the control circuit M6 lights the light source LS a number of times according to the changed time, and indicates by the blinking pattern whether to blink twice every three seconds or once every two seconds depending on whether the first time or the second time was advanced or delayed. In other words, the control circuit M6 changes the number of times the light is turned on and the blinking pattern according to the changed time.

[0097] Here, after the time adjustment setting is confirmed by the passage of a predetermined time T22, the switch I2 is turned off and the light intensity control based on the circadian rhythm is interrupted. In this case, the timer circuit M7 continues to operate without stopping due to the power supply from the power storage unit M8. When the switch I2 is turned on and the power supply from the AC (alternating current power source) I1 is resumed, the control of the color temperature and light intensity based on the circadian rhythm is resumed, and at the point in time when the power supply from the AC (alternating current power source) I1 is resumed, the control circuit M6 resumes the control of the color temperature and light intensity based on the circadian rhythm according to the time on the timer circuit M7.

[0098] For example, even if the light is turned off at 9 p.m. and turned on at 9:30 p.m., the timer circuit M7 is still operating, so control resumes at the color temperature and light intensity based on the circadian rhythm that corresponds to "9:30 p.m."

[0099] Next, the reset mode process performed by the control circuit M6 will be described with reference to Fig. 9. Fig. 9 is a flowchart of the reset mode process performed by the control circuit M6.

[0100] First, the control circuit M6 performs a reset mode determination as to whether or not the reset mode has been set (step S50). More specifically, the control circuit M6 determines, for example, whether or not the switch I2 has been turned on and off five times. If the control circuit M6 has not detected five off-on operations of the switch I2 (step S50: No), the control circuit M6 waits until it detects five off-on operations of the switch I2. In the standby state, the control circuit M6 continues to control the light source LS based on the currently set mode.

[0101] On the other hand, when the control circuit M6 detects five ON / OFF operations of the switch I2 (step S50: Yes), it starts a stopwatch and judges whether or not a predetermined time (e.g., 25 seconds) has not elapsed (step S51). When the stopwatch indicates that the predetermined time has not elapsed, that is, when the predetermined time has elapsed (step S51: No), the control circuit M6 proceeds to step S62.

[0102] On the other hand, if the predetermined time has not elapsed as determined by the stopwatch (step S51: Yes), the control circuit M6 initializes the mode and time adjustment values ​​(step S52), and returns the circadian mode to the initial setting (step S53).

[0103] Next, the control circuit M6 displays an answerback message stating that "light source LS will not blink" to indicate that the device has transitioned to the initialized circadian mode (step S54), and determines whether or not the switch I2 has been turned off or on (step S55).

[0104] If the control circuit M6 does not detect the off / on of the switch I2 in step S55 (step S55: No), the control circuit M6 returns to step S51 and determines whether 25 seconds have elapsed. On the other hand, if the control circuit M6 detects the off / on of the switch I2 in step S55 (step S55: Yes), the control circuit M6 transitions to color temperature fixed mode 1 (step S56). Then, in order to indicate that the control circuit M6 has transitioned to color temperature fixed mode 1, the control circuit M6 performs an answerback display, for example, by blinking the light source LS once every two seconds (step S57), and determines whether the off / on of the switch I2 has been detected (step S58).

[0105] If the control circuit M6 does not detect the off / on of the switch I2 in step S58 (step S58: No), the control circuit M6 returns to step S51 and determines whether or not 25 seconds have elapsed. On the other hand, if the control circuit M6 detects the off / on of the switch I2 in step S58 (step S58: Yes), the control circuit M6 transitions to color temperature fixed mode 2 (step S59), and performs an answerback display, for example, by blinking the light source LS twice in three seconds to indicate that the control circuit M6 has transitioned to color temperature fixed mode 2 (step S60), and determines whether or not the off / on of the switch I2 has been detected (step S61).

[0106] In step S61, if off / on of switch I2 is detected (step S61: Yes), the control circuit M6 returns to step S53, cancels the setting of color temperature fixed mode 2, returns to the initial setting state of the circadian mode, and continues processing from step S54 onwards.

[0107] On the other hand, in step S61, if the off / on state of the switch I2 is not detected (step S61: No), the control circuit M6 returns to step S51 to determine whether or not 25 seconds have elapsed.

[0108] Then, when 25 seconds have elapsed (step S51: No), the control circuit M6 confirms the mode setting (step S62) and ends this reset mode process.

[0109] Next, the reset mode performed by the control circuit M6 will be described with reference to Fig. 10. Fig. 10 is a graph showing the relationship between the rectified voltage applied to the input side of the power factor correction circuit (PFC) M1 in the lighting device M and time in the reset mode.

[0110] When correcting an error in the time setting, resetting the time, or returning the circadian mode to the initial setting, if the switch I2 is turned off and on a predetermined number of times during a preset predetermined time T31, the control circuit M6 transitions to the reset mode. For example, the control circuit M6 transitions to the reset mode when the switch I2 is turned off and on five times while power is being supplied from the AC (alternating current power source) I1. In other words, the control circuit M6 transitions to the reset mode when, for example, a period in which power is supplied from the AC (alternating current power source) I1 and a period in which the power supply from the AC (alternating current power source) I1 is cut off alternately five times. The predetermined time T31 is 5 seconds, which is the same specified time as T1 in FIG. 5 and FIG. 6.

[0111] When the control circuit M6 transitions to the reset mode, it resets the morning mode or night mode setting and the adjustment value of the time adjusted in the morning mode or night mode. That is, it transitions to the initialized circadian mode. Here, "T33-T31" shown in FIG. 10 is "25 seconds" explained in the flowchart of FIG. 9. The predetermined time T32 is, for example, 2 seconds.

[0112] Thereafter, when switch I2 is turned off from the on state and then turned on for a predetermined time T32, the mode transitions to a separately programmed fixed color temperature mode 1. In fixed color temperature mode 1, the lamp is constantly lit with a light amount set at a color temperature that is balanced between the life span determined by the current-time product of the first light source M41 emitting cool color light and the second light source M42 emitting warm color light, such as 4000K, and the working efficiency determined by the color temperature in actual use.

[0113] Thereafter, when switch I2 is turned off from the on state and then turned on for a predetermined time T32, the mode transitions to a separately programmed color temperature fixed mode 2. This color temperature fixed mode 2 is, for example, a mode in which the light amount is further changed compared to the color temperature fixed mode 1.

[0114] Thereafter, in response to further operation of the switch I2, the mode is shifted to the circadian mode, the color temperature fixed mode 1, and the color temperature fixed mode 2 in that order. An example of the setting of the answerback when switching between the modes may be, for example, no blinking in the circadian mode, one blinking every two seconds in the color temperature fixed mode 1, and two blinking every three seconds in the color temperature fixed mode 2. Then, the mode (i.e., either the circadian mode, the color temperature fixed mode 1, or the color temperature fixed mode 2) is confirmed when a predetermined time T33 has elapsed since the first turning off of the switch I2 in the reset mode. The predetermined time T33 is, for example, 30 seconds. After that, the selection of the morning mode or the night mode and the adjustment of the time can be accepted only in the circadian mode.

[0115] The lighting device M according to the above embodiment has been described as having two modes, a morning mode and a night mode, in a 24-hour period. However, the lighting device M may have one mode or three or more modes in a 24-hour period.

[0116] As described above, the lighting device M according to the present embodiment includes a light source LS electrically connected to an AC (alternating current power source) I1 via a switch I2, and a control circuit (control unit) M6 that changes the color temperature and light amount of light emitted from the light source LS over time based on the circadian rhythm, and the control circuit M6 sets the time related to the control of the color temperature and light amount based on the circadian rhythm according to the number of operations of the switch IS in a predetermined time. Therefore, the lighting device M according to the present embodiment can set the time related to the control of the color temperature and light amount based on the circadian rhythm according to the number of operations of the switch I2 in a predetermined time, so there is no need to provide a dedicated remote control device. As a result, the lighting device M that performs lighting based on the circadian rhythm can be provided at a low price, and the introduction of the lighting device M can be simplified. Furthermore, in recent years, lighting devices that can adjust the brightness and color of the lighting device wirelessly using a mobile terminal such as a smartphone have been sold, but detailed settings are required to adjust the brightness and color of the lighting device based on the circadian rhythm. Furthermore, in the lighting device, the setting for pairing the lighting device with the mobile terminal is complicated, and it is also complicated to prepare a registered mobile terminal. On the other hand, the lighting device M according to the present embodiment does not need to be paired with a mobile terminal, does not need a registered mobile terminal, and does not have the problem of radio interference caused by wireless communication. In addition, when a circadian rhythm is realized using a control system that controls the light intensity of cool color LEDs and warm color LEDs with PWM signals using a wired remote control, a control system that controls each with a 0-10V signal, or a control system using a DALI (registered trademark) system that controls both at the same time, the control system is expensive, specialized knowledge is required for initial setup, and the construction costs are high because of the wired remote control. In addition, the lighting device M according to the present embodiment can change the start time of the morning mode or night mode regardless of the current time, and the time setting operation can be easily performed.Furthermore, the lighting device M of this embodiment can shift the mode by 12 hours by performing switch operations for advancing six times or delaying six times in two modes, so that time adjustment can be performed with a small number of operations.

[0117] In addition, the lighting device M according to this embodiment has a first mode for controlling the color temperature and light quantity based on the circadian rhythm in a first time period and a second mode for controlling the color temperature and light quantity based on the circadian rhythm in a second time period, and the control circuit M6 transitions to the first mode or the second mode depending on the number of times the switch I2 is operated in a predetermined time period. Therefore, the lighting device M according to this embodiment can divide 24 hours into two, the first mode and the second mode, making it easy to set the time. On the other hand, if the time could be set by turning the device on and off without dividing the 24 hours, the operation of adjusting the time would be complicated, or a person would have to perform an operation to synchronize the time only at a fixed time, which would not be practical.

[0118] Furthermore, in the lighting device M of this embodiment, the control circuit M6 adjusts the time in the first time zone in accordance with the number of times the switch I2 is operated within a predetermined period of time after transitioning to the first mode, and starts control of the color temperature and the amount of light based on the circadian rhythm starting from the adjusted time, and adjusts the time in the second time zone in accordance with the number of times the switch I2 is operated within a predetermined period of time after transitioning to the second mode, and starts control of the color temperature and the amount of light based on the circadian rhythm starting from the adjusted time.

[0119] In the lighting device M according to this embodiment, the control circuit M6 sets, as the first mode, a mode in which the color temperature and the light amount are controlled based on the circadian rhythm with the start time being the first time in the first time slot, or sets, as the second mode, a mode in which the color temperature and the light amount are controlled based on the circadian rhythm with the start time being the second time slot. In addition, the control circuit M6 changes the first time in response to the number of times the switch I2 is operated within a predetermined period immediately after the first mode is set, and controls the color temperature and the light amount based on the circadian rhythm with the start time being the adjusted time, or changes the second time in response to the number of times the switch I2 is operated within a predetermined period immediately after the second mode is set, and controls the color temperature and the light amount based on the circadian rhythm with the start time being the adjusted time.

[0120] In addition, in the lighting device M according to this embodiment, the first time is a time after adjustment in the first mode or a preset initial setting time, and the second time is a time after adjustment in the second mode or a preset initial setting time.

[0121] In the lighting device M according to this embodiment, when the first time or the second time is changed, the control circuit M6 turns on the light source LS a number of times according to the changed time, and changes the blinking pattern according to whether the first time or the second time is advanced or delayed. Therefore, the lighting device M according to this embodiment allows the user to easily determine whether the operation performed by the user has been appropriately input to the lighting device M based on the blinking pattern of the light source LS and the number of times it is repeated.

[0122] The lighting device M according to this embodiment further includes a timer circuit M7. In addition, the control circuit M6 stores the time difference between the start time and the set time, and reflects this time on the timer circuit M7.

[0123] The lighting device M according to this embodiment further includes a power storage unit M8 that supplies power to the timer circuit M7 when the power supply from the AC (alternating current power source) I1 is cut off. Furthermore, when the power supply from the AC (alternating current power source) I1 is resumed, the control circuit M6 resumes the control of the color temperature and the light amount based on the circadian rhythm according to the time of the timer circuit M7. Therefore, the lighting device M according to this embodiment can perform the lighting control of the color temperature and the light amount based on the circadian rhythm even after the power supply from the AC (alternating current power source) I1 is cut off.

[0124] In the lighting device M according to this embodiment, the control circuit M6 transitions to the reset mode when the time adjustment is set to the morning mode or the night mode and the number of times the switch I2 has been operated is a predetermined number of times. Therefore, the lighting device M according to this embodiment can prevent the time from being readjusted after the time adjustment unless the device goes through the reset mode. By increasing the complexity of the operation of the switch I2 for time readjustment, it is possible to prevent the time from being erroneously adjusted due to an erroneous operation of the switch I2.

[0125] In the lighting device M according to this embodiment, the light source LS includes a first light source M41 that emits cool color light and a second light source M42 that emits warm color light, and the first light source M41 emits light with a color temperature higher than the maximum color temperature in the circadian rhythm, which can extend the expected life of the lighting device M.

[0126] In the lighting device M according to the embodiment described above, the number of times the switch I2 is turned on and off is merely an example, and can be changed to an appropriate number as necessary.

[0127] Furthermore, in the illumination device M according to the embodiment described above, the light source LS is described as including a plurality of first light sources M41 that emit cool color light and a plurality of second light sources M42 that emit warm color light. However, the light source LS according to the present embodiment is not limited thereto. For example, the light source LS may include a plurality of first light sources that emit blue light, a plurality of second light sources that emit red light, and a plurality of third light sources that emit green light. Of course, the light source LS is not limited thereto, and may be any light source that can change the color temperature and light amount of light over time.

[0128] Although the above description is based on the embodiment of the lighting device M according to the present invention, the present invention is not limited to the embodiment, and it goes without saying that various modifications are possible without departing from the gist of the present invention. Such modifications without departing from the gist of the present invention are also included in the technical scope of the present invention, and this will be clear to those skilled in the art from the description of the claims. [Explanation of symbols]

[0129] I1 AC (AC power supply), I2 switch, LS light source, M lighting device, M6 control circuit (control section)

Claims

1. a light source electrically connected to a power source via a switch; a control unit that changes the color temperature and the amount of light emitted from the light source over time based on a circadian rhythm; Equipped with The control unit sets a time for controlling the color temperature and the light amount based on a circadian rhythm in accordance with the number of times the switch is operated within a predetermined period of time. Lighting equipment.

2. The control modes of the color temperature and the light amount based on the circadian rhythm include a first mode for controlling the color temperature and the light amount based on the circadian rhythm in a first time period, and a second mode for controlling the color temperature and the light amount based on the circadian rhythm in a second time period, The control unit transitions to the first mode or the second mode depending on the number of times the switch is operated within a predetermined time.

10. The lighting device of claim 1.

3. the control unit adjusts the time in the first time zone in response to the number of times the switch is operated within a predetermined period after transition to the first mode, and starts control of the color temperature and the amount of light based on the circadian rhythm with the adjusted time as a start time, and adjusts the time in the second time zone in response to the number of times the switch is operated within a predetermined period after transition to the second mode, and starts control of the color temperature and the amount of light based on the circadian rhythm with the adjusted time as a start time.

3. The lighting device according to claim 2.

4. The control unit is A mode for controlling the color temperature and the light amount based on a circadian rhythm starting at a first time in the first time period is set as the first mode, or a mode for controlling the color temperature and the light amount based on a circadian rhythm starting at a second time in the second time period is set as the second mode, changing the first time in response to the number of times the switch is operated within a predetermined period of time immediately after the first mode is set, and controlling the color temperature and the amount of light based on a circadian rhythm starting from the adjusted time, or changing the second time in response to the number of times the switch is operated within a predetermined period of time immediately after the second mode is set, and controlling the color temperature and the amount of light based on a circadian rhythm starting from the adjusted time.

3. The lighting device according to claim 2.

5. the first time is a time after adjustment in the first mode or a preset initial setting time, The second time is a time after adjustment in the second mode or a preset initial setting time.

5. The lighting device according to claim 4.

6. when the first time or the second time is changed, the control unit turns on the light source a number of times according to the changed time, and changes a blinking manner according to whether the first time or the second time is advanced or delayed.

6. The lighting device according to claim 4 or 5.

7. Timer circuit, Further equipped with The control unit stores the time set as the start time and the adjusted time difference, and reflects the time on the timer circuit.

3. The lighting device according to claim 2.

8. a power storage unit that supplies power to the timer circuit when the power supply from the power source is cut off; Further equipped with When the supply of power from the power source is resumed, the control unit resumes the control of the color temperature and the light amount based on the circadian rhythm in accordance with the time on the timer circuit.

8. An illumination device according to claim 7.

9. A reset mode is provided for resetting the adjusted time to an initial value, The control unit transitions to the reset mode when the time adjustment is set and the number of operations of the switch within a predetermined period of time is a predetermined number.

4. The lighting device according to claim 3.

10. The light source includes a first light source that emits light of a cool color system and a second light source that emits light of a warm color system, The first light source emits light having a color temperature higher than a maximum color temperature in a circadian rhythm.

3. The lighting device according to claim 2.

11. a light source electrically connected to a power source via a switch; a control unit that changes the color temperature and the amount of light emitted from the light source over time based on a circadian rhythm; In a lighting device comprising: The control unit sets a time for controlling the color temperature and the light amount based on a circadian rhythm in accordance with the number of times the switch is operated within a predetermined period of time. How to set the time on a lighting device.

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