LED lamp for reducing wasted power and control method therefor

Abstract

According to the present invention, an electronic device comprises: a bridge circuit connected to the outside and configured to rectify at least a portion of external AC power; an illuminance sensor; a control circuit connected to the illuminance sensor; at least one LED of which the brightness is adjusted by the control circuit; a converter configured to supply DC power to the control circuit from the AC power rectified by the bridge circuit; and a power supply circuit including an optical coupler for controlling the converter on the basis of optical coupling. The control circuit may be configured to: identify the brightness around the electronic device by using the illuminance sensor; turn off the at least one LED on the basis of identifying that the brightness around the electronic device is less than the reference brightness; and control the optical coupler of the power supply circuit in order to stop supplying power from the bridge circuit to the converter.

Description

LED lighting and its control method for reducing power waste

[0001] The advent of LED lighting has made it possible to significantly reduce power consumption compared to incandescent or fluorescent lamps of the past.

[0002] When using LED lights as streetlights or office lighting, the LED lights are dimmed or turned off depending on the lighting level to further reduce energy consumption.

[0003] However, even when the LED lights are turned off, power is still supplied to the converter and control circuit, consuming electricity.

[0004] In this way, the present invention relates to a technology that automatically cuts off the power supplied to the converter or control circuit without turning the switch 'off' in the above state, thereby minimizing energy consumption by reducing the wasted power to zero.

[0005] By reducing power consumption in this way, we can prevent environmental pollution and global warming caused by carbon emissions from wasted power, thereby achieving carbon neutrality.

[0006] In office lighting, multiple lights are turned on and off as a group with a single light switch, so the lights cannot be turned off individually unless the light switch is turned off.

[0007] In order to reduce energy consumption, LED lights are being used to automatically adjust their brightness according to the surrounding light level, further reducing power consumption.

[0008] This method reduces energy consumption by varying the current flowing through LED lights depending on the ambient brightness. However, even when the ambient brightness becomes sufficient to turn off the lights, they cannot be turned off unless the light switch is turned "off," resulting in unnecessary power wastage in the LED lights.

[0009] This unnecessary power consumption is reduced, resulting in carbon emissions.

[0010] It also relates to a technology that detects rapid changes in ambient illuminance when the lights are off and immediately turns on LED lights.

[0011] Also, in the case of street lights that 'turn on' and 'turn off' with a single light sensor, there is a problem of malfunction because the light sensor cannot read the correct sensor value due to the light sensor being covered by leaves of street trees or other objects or contamination.

[0012] Accordingly, the purpose of the present invention is to solve the above problems in dimmable LED lights or street lights.

[0013] A control circuit is configured to automatically adjust the power supply to the LED light according to the ambient illuminance by providing a light sensor that detects the ambient illuminance in the LED light installed near the office window, and when the lighting-off condition is met, the power to the LED light is automatically cut off, and when the lighting condition is met again from the lighting-off condition, a means is provided to automatically supply power.

[0014] In addition, a rapid change in light detection means is provided so that when the surroundings suddenly become dark while the lights are off, it can be detected and the lights can be turned on immediately.

[0015] In addition, in the case of streetlights, in order to prevent malfunction due to contamination of surrounding street tree leaves or light sensors, multiple light sensors are installed and their values ​​are compared to determine the correct value to prevent malfunction.

[0016] In order to achieve the above purpose, according to an exemplary aspect of the present invention, a power supply / cutoff unit is provided that cuts off power to a converter or control circuit when a condition for turning off an LED light is satisfied, and supplies power when a condition for turning on the LED light is satisfied.

[0017] When the above-mentioned off condition is satisfied and the power supply is cut off, a power supply 1 that supplies power only to the light detection sensor and the control unit, and a control unit that receives light data from a sensor unit composed of one light detection sensor or one or more light sensors that detect the surrounding light and analyzes, determines, and controls the data to prevent malfunction are configured.

[0018] In addition, it is equipped with a rapid light change detection unit that detects when the surroundings become dark rapidly when the lights are off, so that the LED lights turn on immediately when a rapid change in light is detected.

[0019] In addition, in order to prevent malfunction due to a defect in the light sensor, changes in the surrounding environment, or contamination, a means is configured to read and compare values ​​by configuring multiple light sensors and control according to multiple values.

[0020] An electronic device is described. The electronic device may include a power supply circuit including a bridge circuit connected to an external environment and configured to rectify at least a portion of an AC power source from the external environment, a light sensor, a control circuit connected to the light sensor, one or more LEDs whose brightness is controlled by the control circuit, a converter configured to supply DC power to the control circuit from the AC power source rectified by the bridge circuit, and an optical coupler for controlling the converter based on optical coupling. The control circuit may be configured to identify a brightness surrounding the electronic device using the light sensor. The control circuit may be configured to turn off the one or more LEDs based on identifying that the brightness surrounding the electronic device is less than a reference brightness. The control circuit may be configured to control the optical coupler of the power supply circuit to stop supplying power from the bridge circuit to the converter based on identifying that the brightness surrounding the electronic device is less than the reference brightness.

[0021] A method is described. The method may be performed in an electronic device having a power supply circuit including a bridge circuit connected to an external source and configured to rectify at least a portion of an AC power source from the external source, a light sensor, a control circuit connected to the light sensor, one or more LEDs whose brightness is controlled by the control circuit, a converter configured to supply DC power to the control circuit from the AC power source rectified by the bridge circuit, and an optical coupler for controlling the converter based on optical coupling. The method may include an operation in which the control circuit uses the light sensor to identify a brightness surrounding the electronic device. The method may include an operation in which, based on identifying that the brightness surrounding the electronic device is less than a reference brightness, the one or more LEDs are turned off. The method may include an operation in which, based on identifying that the brightness surrounding the electronic device is less than the reference brightness, the optical coupler of the power supply circuit is controlled to stop supplying power from the bridge circuit to the converter.

[0022] A non-transitory computer-readable storage medium is described. The non-transitory computer-readable storage medium may store one or more programs. The one or more programs may include instructions that, when executed by an electronic device having a power supply circuit including a bridge circuit connected to an external source and configured to rectify at least a portion of an AC power source from the external source, a light sensor, a control circuit connected to the light sensor, one or more LEDs whose brightness is controlled by the control circuit, a converter configured to supply DC power to the control circuit from the AC power source rectified by the bridge circuit, and an optical coupler for controlling the converter based on optical coupling, cause the control circuit to identify a brightness surrounding the electronic device using the light sensor. The one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to turn off the one or more LEDs based on identifying that the brightness surrounding the electronic device is less than a reference brightness. The one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to control the optical coupler of the power supply circuit to stop supplying power from the bridge circuit to the converter based on identifying that the brightness around the electronic device is less than a reference brightness.

[0023] In LED lighting that uses dimming control based on light detection, such as in LED streetlights and office lights, power is supplied to the converter even when the LED module is turned off, wasting unnecessary power.

[0024] The present invention has the effect of reducing energy waste by cutting off the power wasted above when the LED module of the AD lighting lamp is turned off, thereby reducing carbon emissions and contributing to the realization of carbon neutrality.

[0025] In addition, in the case of street lights, power is still supplied to the street lights for control purposes even when the lights are turned off in order to turn them on or off remotely, resulting in unnecessary power waste.

[0026] When the streetlight of the present invention is turned off, the power is cut off, thereby reducing unnecessary power waste.

[0027] The above-described and other features, aspects, and advantages of the present invention will be better understood by reading the following detailed description with reference to the accompanying drawings, wherein like reference numerals in the drawings are intended to represent the same or similar elements or components throughout the drawings.

[0028] Figure 1 is a drawing illustrating one embodiment of an LED lighting device configuration that blocks waste power according to the present invention.

[0029] Figure 2 is a drawing illustrating an embodiment of an LED lighting device and a light switch that block waste power according to the present invention.

[0030] Figure 3 is a drawing illustrating an example of an external shape applied to a streetlight according to the present invention.

[0031] Figure 4 is a drawing illustrating an example of an external appearance applied to an office, etc. according to the present invention.

[0032] Figure 5 is a drawing illustrating an example of an embodiment installed in an office, etc. according to the present invention.

[0033] Figure 6 is a drawing illustrating the configuration of one embodiment of a detection unit configuration that detects a sudden darkening of the surroundings according to the present invention.

[0034] Figure 7 is a drawing illustrating one embodiment of a power supply / cutoff unit configuration according to the control conditions of the present invention.

[0035] Figure 8 is a drawing illustrating an embodiment of a group of LED lights configured in a single light switch according to the present invention.

[0036] The following description, provided with reference to the accompanying drawings, is provided to assist in a comprehensive understanding of exemplary embodiments of the present invention as defined by the claims and their equivalents. While such description contains numerous specific details that are helpful in understanding the present invention, these should be considered merely illustrative. Accordingly, it will be readily apparent to those skilled in the art that various modifications and variations of the embodiments described herein can be made without departing from the scope and spirit of the present invention.

[0037] In the description below, even if any component or object is expressed in singular, it should be understood to include plural components or objects as well, unless the context clearly indicates otherwise.

[0038] The terms "generally, approximately, essentially," etc., as used herein, are used to mean that any characteristic, parameter, or value(s) need not necessarily be provided exactly, but may, for example, allow for some degree of tolerance, measurement tolerance, or variation known to those skilled in the art, which does not preclude the effect of providing the same characteristic, parameter, or value(s).

[0039] However, in describing the configuration and operating principles of various embodiments of the present invention, detailed descriptions of certain known functions and component(s) may be omitted for convenience in the interest of clarity and conciseness of the present disclosure.

[0040] Figure 1 is a drawing illustrating one embodiment of an LED lighting device configuration that blocks waste power according to the present invention.

[0041] Figure 2 is a drawing illustrating an embodiment of an LED lighting device and a light switch that block waste power according to the present invention.

[0042] FIG. 6 is a drawing illustrating the configuration of one embodiment of a detection unit configuration that detects a sudden darkening of the surroundings according to the present invention.

[0043] FIG. 7 is a drawing illustrating one embodiment of a power supply / cutoff unit configuration that supplies / cuts power according to the control conditions of the present invention.

[0044] Figure 8 is a drawing illustrating an embodiment of a group of LED lights configured in a single light switch according to the present invention.

[0045] Its composition and operating principles are explained in detail based on the drawing.

[0046] First, the configuration of the LED lighting fixture (1) that blocks wasted power is as follows:

[0047] An LED module (30) configured to turn the light on and off according to the control of the control unit (10);

[0048] A light sensor (60) composed of one or more sensors (configurable with resistors R1, 2, 3 and CDS Cd1, 2, 3) installed at a predetermined location to detect the light level around the light well;

[0049] A power supply / cutoff unit (50) that can be configured with a relay, triac, or FET to cut off unnecessary power waste when the condition for turning off the LED module (30) from the light sensor is satisfied;

[0050] Power supply 1 (40) composed of diode D2 and supercapacitor or secondary battery SC to supply minimum power only to the light sensor (60) and control unit (10) for control when power supply is cut off from the power supply / cutoff unit (50);

[0051] A converter (20) that creates and supplies the power required for lighting when power is supplied;

[0052] A control unit (10) that receives information related to the illumination from a light sensor (60) input from a lighting fixture and the status of power supply 1 ((40), and performs calculations, judgments, and controls the information;

[0053] A driving unit (70) that can be configured with a FET or transistor that turns the LED module (30) ‘on’ or ‘off’ according to the control of the control unit (10);

[0054] It consists of

[0055] As shown in Fig. 2 and Fig. 8, the LED lighting (1) can be turned on and off by supplying power to one or more lights in a group using a light switch (300) in an office, etc.

[0056] As shown in Fig. 6, a detector (80) is configured with resistors R6 and R7 and a comparator U1 to detect a rapid change in the surrounding illuminance.

[0057] In addition, it is possible to remotely notify the central control unit of any malfunctions in the light sensor (60).

[0058] A communication module (90) is configured.

[0059] Also, as shown in Fig. 7, the power supply / cutoff unit (50) is composed of a bridge diode BR, resistors R10, 12, R13, R14, FET transistors Q5, Q6, and photocoupler PC1.

[0060] If I explain the operation of the present invention,

[0061] Dimming control

[0062] In general, in order to reduce power consumption, the brightness of LED lights is divided into several stages according to the brightness value of the brightness sensor (60). For example, if the brightness sensor (60) value is in the Rd1-Rd2 range, the brightness is controlled to 1% - 30%, if the brightness sensor (60) value is in the Rd2-Rd3 range, the brightness is controlled to 31% - 50%, if the brightness sensor (60) value is in the Rd3-Rd4 range, the brightness is controlled to 51% - 99%, and if the brightness sensor (60) value is Rd4 or higher, the control unit (10) receives the input value of the brightness sensor (60) from S1, S2, and S3, and controls the gate of the driving unit (70) in a PWM modulation manner to change the current flowing through the LED module (30) to control the brightness by varying it from 0 to 100%.

[0063] In this way, when the surroundings are very bright, the lights can be turned off and the input power can be cut off, reducing unnecessary power consumption.

[0064] If the value of the light sensor (60) is lower than Rd1, which is a condition for turning off the LED module (30), the control unit (10) controls the output O1 to turn the gate of the driving unit (70) low, thereby turning off the driving unit (70) and blocking the current flowing to the LED module (30), thereby turning off the light.

[0065] At this time, power is continuously supplied to the converter (20) and the control unit (10), so power continues to be consumed.

[0066] Another embodiment of the above dimming control method

[0067] The illuminance value read from the illuminance sensor (50) located in the lighting fixture and the illuminance value 90 cm above the floor, which is the actual use space, are different.

[0068] This is a control method that uses dimming control to resolve these deviations.

[0069] The illuminance of a space is determined by calculating the brightness and quantity of lighting lights during lighting design.

[0070] Therefore, the step of turning the light on 100% and determining the value of the light sensor (60) read at this time (let's say Rd5) as the light level reference value to be maintained;

[0071] A step of controlling the light sensor (60) value to maintain the reference value Rd5 by dimming when the brightness becomes brighter than the reference value Rd5;

[0072] A control method for controlling the light by controlling the light to a level where the dimming control reaches 5% or less and the light sensor (60) inputs a light value brighter than the reference value Rd5, judging that the surrounding area has a lot of natural light, and controlling the light to turn off.

[0073] Power off control

[0074] In the dimming control of the present invention, when the light sensor (60) value is lower than Rd1 and the LED module (30) is turned off, power is continuously supplied to the converter (20) and the control unit (10), so that power is continuously consumed.

[0075] In order to block this unnecessary power waste, the control unit (10) controls the output O2 to 'low' at this time and applies it to the diode of the photocoupler PC1 of the power supply / cutoff unit (50) through the resistor R14.

[0076] At this time, the transistor of the photocoupler PC1 is turned 'off', and voltage is applied to the gate of FET Q5 through the resistor R13, so that FET Q5 is turned 'on', and the gate of FET Q6 becomes 'low', so that the current supplied through b and c of (20) is cut off, and the power supply to the converter (20) is cut off, so that the power consumption becomes zero.

[0077] Charging control during power cut

[0078] In order to control the light sensor (60) by detecting its status when the power supply is cut off, power is supplied from power source 1 (40) to the light sensor (60) and the control unit (10).

[0079] At this time, in order to further reduce the power consumption of power supply 1 (40), the control unit (10) enters sleep mode and wakes up periodically every T1 hours for a set time (for example, if it is T1) to read the VCC value of power supply 1 (40) from the analog-to-digital converter VCC1, and when the voltage required for charging (for example, if it is VC) reaches VC, the control unit (10) controls the output O2 to 'high' to apply it to the diode of the photocoupler PC1 of the power supply / cutoff unit (50) through the resistor R14 for charging.

[0080] At this time, the transistor of the photocoupler PC1 is turned 'on', the voltage at the gate of FET Q5 becomes 'low', FET Q5 becomes 'off', the gate of FET Q6 becomes 'high', FET Q6 becomes 'on', and current flows to FET Q6 through b and c of the converter (20), supplying power to the converter (20) and supplying power to power source 1 (40).

[0081] In this way, the converter (20) supplies VLED power to power source 1 (40) to charge power source 1 (40).

[0082] At this time, the output voltage VCC of power supply 1 (40) is read from the VCC1 analog-to-digital converter AD, and when the charging voltage (for example, VCCM) reaches VCCM, the control unit (10) outputs O2.

[0083] By performing power cut control, the power supply / cutoff unit (50) is turned off to cut off the power supply, thereby cutting off wasted power and returning to sleep mode.

[0084] LED module lighting control in off state

[0085] When the condition for periodically waking up from sleep mode and reading the value of the light sensor (60) to turn on the LED module (30) is met, the control unit (10) controls output O2 and output O1 to turn on the power supply / cutoff unit (50) and controls the driving unit (70) to variably control the current value of the LED module (30) according to the lighting condition, thereby turning on the LED module (30) with variable brightness.

[0086] LED module lighting control when there is a rapid change in brightness in the off state

[0087] When the LED light (1) is turned off (in sleep mode), the input power is cut off, so when the surroundings become dark rapidly due to environmental changes, such as when there are many clouds and it becomes dark, it cannot be detected.

[0088] The detector (8) configured to immediately detect this state is configured to compare the voltage of the inverter terminal of the comparator U1, into which the value of the light sensor (60) is input, with the voltage of the non-inverter terminal of the comparator U1 connected to resistors R5 and R7, so that when a sudden change occurs, the voltage of the inverter terminal is lowered. When a low case occurs, the output INT of the comparator U1 becomes 'high' and is transmitted to the interrupt INT of the control unit (10), and the control unit (10) wakes up from the sleep mode and controls the outputs O1 and O2 to supply power and turn on the LED light (1).

[0089] Power off control during group control

[0090] As shown in FIGS. 5 and 8, multiple lights, such as LED lights A, B, and C, are installed by connecting them to a single switch (300) in FIG. 2 from the window in the office, so that power consumption is reduced through dimming in the window where there is a lot of sunlight. However, when the condition for turning off the light is met by reading the illuminance value from the illuminance sensor (60), even if the LED module (30) is turned off, power is still being consumed and wasted in the converter (20).

[0091] To reduce this, power cut-off control is performed to turn off the power supply / cut-off part (50) of the LED lighting (1) that is the light-off condition, thereby completely blocking the wasted power and reducing unnecessary power wastage.

[0092] Light sensor inspection management and control

[0093] In order to prevent malfunction of the light sensor when the window of the light sensor (60) is contaminated with dust or dirt due to the environment in an LED light (1) installed outside, such as a streetlight, a plurality of light sensors (60) are configured to read and compare the sensor values, and if the value of the sensor is compared with the values ​​of a plurality of other sensors, and if there is a light sensor (60) with a comparison judgment standard value JS (for example, if there is a difference of 10% or more), it is determined that the sensor is contaminated with dust or impurities or is incorrect due to the influence of the surrounding environment, and the corresponding contents are transmitted to the central control unit through a communication module (90) so that this can be checked.

[0094] At this time, the control of the LED module (30) determines that a number of sensor values ​​are normal values ​​and controls them according to these values.

[0095] The electronic device as described above may include a power supply circuit including a bridge circuit connected to the outside and configured to rectify at least a portion of an AC power source from the outside, a light sensor, a control circuit connected to the light sensor, one or more LEDs whose brightness is controlled by the control circuit, a converter configured to supply DC power to the control circuit from the AC power source rectified by the bridge circuit, and an optical coupler for controlling the converter based on optical coupling. The control circuit may be configured to identify a brightness surrounding the electronic device using the light sensor. The control circuit may be configured to turn off the one or more LEDs based on identifying that the brightness surrounding the electronic device is less than a reference brightness. The control circuit may be configured to control the optical coupler of the power supply circuit to stop supplying power from the bridge circuit to the converter based on identifying that the brightness surrounding the electronic device is less than the reference brightness.

[0096] For example, the power supply circuit may further include a first transistor including a resistor having one end connected to the control circuit and the other end connected to the one end of the optical coupler, a gate electrode connected to the other end of the optical coupler, and a source electrode connected to ground, and a second transistor including a gate electrode connected to a drain electrode of the first transistor, a source electrode connected to the ground, and a drain electrode connected to the converter. The control circuit may be configured to change a level of a signal applied to the one end of the optical coupler of the power supply circuit to change states of the first transistor and the second transistor based on identifying, using the light sensor, that brightness around the electronic device is less than the reference brightness. The converter may be configured to stop converting the AC power rectified by the bridge circuit into the DC power based on identifying, through the drain electrode of the second transistor, a change in the state of the second transistor.

[0097] For example, the control circuit may further include a transistor having a gate electrode connected to the control circuit, a source electrode connected to ground, and a drain electrode connected to the one or more LEDs. The control circuit may be configured to deactivate the transistor by sending a signal to the gate electrode of the transistor to turn off power to the one or more LEDs based on identifying, using the light sensor, that the brightness around the electronic device is less than the reference brightness.

[0098] For example, the converter may further include a diode having an anode connected to one end thereof and a capacitor connected to a cathode of the diode. The capacitor may be configured to discharge to drive the control circuit and the light sensor while conversion of the AC power is interrupted based on the converter.

[0099] For example, the control circuit may be configured to detect the voltage of the capacitor. The control circuit may be configured to control the optical coupler of the power supply circuit to supply power from the bridge circuit to the converter based on identifying that the detected voltage is less than a reference voltage.

[0100] For example, the power supply circuit may further include a first transistor including a resistor having one end connected to the control circuit and the other end connected to the one end of the optical coupler, a gate electrode connected to the other end of the optical coupler, and a source electrode connected to ground, and a second transistor including a gate electrode connected to a drain electrode of the first transistor, a source electrode connected to the ground, and a drain electrode connected to the converter. The control circuit may be configured to change a level of a signal applied to the one end of the optical coupler of the power supply circuit to change states of the first transistor and the second transistor based on identifying that the detected voltage is less than the reference voltage. The converter may be configured to convert the AC power rectified by the bridge circuit into the DC power based on identifying a change in the state of the second transistor via the drain electrode of the second transistor.

[0101] For example, the control circuit may be configured to identify the brightness around the electronic device using the light sensor. The control circuit may be configured to turn on the one or more LEDs based on identifying that the brightness around the electronic device exceeds the reference brightness.

[0102] For example, the control circuit may further include a transistor having a gate electrode connected to the control circuit, a source electrode connected to ground, and a drain electrode connected to the one or more LEDs. The control circuit may be configured to activate the transistor by sending a signal to the gate electrode of the transistor to turn on power to the one or more LEDs based on identifying, using the light sensor, that the brightness around the electronic device exceeds the reference brightness.

[0103] For example, the control circuit may be configured to control the turned-on one or more LEDs to emit light according to a first brightness based on identifying that the brightness around the electronic device is greater than the reference brightness and less than another reference brightness. The other reference brightness may be greater than the reference brightness. The control circuit may be configured to control the turned-on one or more LEDs to emit light according to a second brightness that is greater than the first brightness based on identifying that the brightness around the electronic device is greater than the other reference brightness.

[0104] For example, the control circuit may be configured to detect a voltage of the capacitor, which is charged by the DC power supplied from the converter while the AC power is converted into the DC power based on the converter. The control circuit may be configured to control the optocoupler of the power supply circuit to stop the power supply from the bridge circuit to the converter based on identifying that the detected voltage reaches another reference voltage higher than the reference voltage.

[0105] For example, the power supply circuit may further include a first transistor including a resistor having one end connected to the control circuit and the other end connected to the one end of the optical coupler, a gate electrode connected to the other end of the optical coupler, and a source electrode connected to ground, and a second transistor including a gate electrode connected to a drain electrode of the first transistor, a source electrode connected to the ground, and a drain electrode connected to the converter. The control circuit may be configured to change a level of a signal applied to the one end of the optical coupler of the power supply circuit to change states of the first transistor and the second transistor based on identifying that the detected voltage reaches the different reference voltage. The converter may be configured to stop converting the AC power rectified by the bridge circuit into the DC power based on identifying a change in the state of the second transistor via the drain electrode of the second transistor.

[0106] For example, the control circuit may be configured to be deactivated while the conversion of the AC power source is interrupted based on the converter. The control circuit may be configured to detect the voltage of the capacitor as it is activated based on the cycle.

[0107] For example, the circuit may further include a voltage comparator having one end including a non-inverter end to which a reference voltage is applied and an inverter end connected to the light sensor, and the other end connected to the control circuit. The control circuit may be configured to identify, through the other end of the comparator, that a voltage corresponding to the reference voltage is applied from the light sensor to the comparator through the inverter end of the comparator. The control circuit may be configured to control the optocoupler of the power supply circuit for supplying power from the bridge circuit to the converter based on identifying that a voltage corresponding to the reference voltage is applied to the comparator through the inverter end of the comparator.

[0108] For example, the control circuit may be configured to identify the brightness around the electronic device using the light sensor. The control circuit may be configured to turn on the one or more LEDs based on identifying that the brightness around the electronic device exceeds the reference brightness.

[0109] For example, the control circuit may further include a transistor having a gate electrode connected to the control circuit, a source electrode connected to ground, and a drain electrode connected to the one or more LEDs. The control circuit may be configured to activate the transistor by sending a signal to the gate electrode of the transistor to turn on power to the one or more LEDs based on identifying, using the light sensor, that the brightness around the electronic device exceeds the reference brightness.

[0110] For example, the control circuit may be configured to control the turned-on one or more LEDs to emit light according to a first brightness based on identifying that the brightness around the electronic device is greater than the reference brightness and less than another reference brightness. The other reference brightness may be greater than the reference brightness. The control circuit may be configured to control the turned-on one or more LEDs to emit light according to a second brightness that is greater than the first brightness based on identifying that the brightness around the electronic device is greater than the other reference brightness.

[0111] For example, the control circuit may further include a communication circuit connected to the control circuit. The light sensor may be composed of a plurality of light sensors. The control circuit may be configured to obtain values ​​for brightness around the electronic device using each of the plurality of light sensors. The control circuit may be configured to identify a value having an error outside a reference range among the values ​​by comparing the values ​​with each other. The control circuit may be configured to transmit a signal to an external electronic device through the communication circuit, notifying an light sensor among the plurality of light sensors that has obtained the value, based on the identification of the value having an error outside the reference range among the values.

[0112] The method as described above can be performed in an electronic device having a power supply circuit including a bridge circuit connected to the outside and configured to rectify at least a portion of an AC power source from the outside, a light sensor, a control circuit connected to the light sensor, one or more LEDs whose brightness is controlled by the control circuit, a converter configured to supply DC power to the control circuit from the AC power source rectified by the bridge circuit, and an optical coupler for controlling the converter based on optical coupling. The method can include an operation in which the control circuit uses the light sensor to identify a brightness around the electronic device. The method can include an operation in which the one or more LEDs are turned off based on identifying that the brightness around the electronic device is less than a reference brightness. The method can include an operation in which the optical coupler of the power supply circuit is controlled to stop supplying power from the bridge circuit to the converter based on identifying that the brightness around the electronic device is less than the reference brightness.

[0113] For example, the power supply circuit may further include a first transistor including a resistor having one end connected to the control circuit and the other end connected to the one end of the optical coupler, a gate electrode connected to the other end of the optical coupler, and a source electrode connected to ground, and a second transistor including a gate electrode connected to a drain electrode of the first transistor, a source electrode connected to the ground, and a drain electrode connected to the converter. The method may include an operation in which the control circuit changes a level of a signal applied to the one end of the optical coupler of the power supply circuit to change states of the first transistor and the second transistor based on identifying, using the light sensor, that brightness around the electronic device is less than the reference brightness. The method may include an operation in which the converter stops converting the AC power rectified by the bridge circuit into the DC power based on identifying, through the drain electrode of the second transistor, a change in the state of the second transistor.

[0114] For example, the electronic device may further include a transistor having a gate electrode connected to the control circuit, a source electrode connected to ground, and a drain electrode connected to the one or more LEDs. The method may include an operation in which the control circuit deactivates the transistor by sending a signal to the gate electrode of the transistor to turn off power to the one or more LEDs based on identifying, using the light sensor, that brightness around the electronic device is less than the reference brightness.

[0115] For example, the electronic device may further include a diode having an anode connected to one end of the converter and a capacitor connected to a cathode of the diode. The method may include an operation in which the capacitor is discharged to drive the control circuit and the light sensor while conversion of the AC power is interrupted based on the converter.

[0116] For example, the method may include an operation in which the control circuit detects a voltage of the capacitor. The method may include an operation in which the control circuit controls the optical coupler of the power supply circuit to supply power from the bridge circuit to the converter based on identifying that the detected voltage is less than a reference voltage.

[0117] For example, the power supply circuit may further include a first transistor including a resistor having one end connected to the control circuit and the other end connected to the one end of the optical coupler, a gate electrode connected to the other end of the optical coupler, and a source electrode connected to ground, and a second transistor including a gate electrode connected to a drain electrode of the first transistor, a source electrode connected to the ground, and a drain electrode connected to the converter. The method may include an operation in which the control circuit changes a level of a signal applied to the one end of the optical coupler of the power supply circuit to change states of the first transistor and the second transistor based on identifying that the detected voltage is less than the reference voltage. The method may include an operation in which the converter converts the AC power rectified by the bridge circuit into the DC power based on identifying a change in the state of the second transistor through the drain electrode of the second transistor.

[0118] For example, the method may include an operation in which the control circuit identifies the brightness around the electronic device using the light sensor. The method may include an operation in which the control circuit turns on the one or more LEDs based on identifying that the brightness around the electronic device exceeds the reference brightness.

[0119] For example, the electronic device may further include a transistor having a gate electrode connected to the control circuit, a source electrode connected to ground, and a drain electrode connected to the one or more LEDs. The method may include an operation in which the control circuit activates the transistor by sending a signal to the gate electrode of the transistor to turn on power to the one or more LEDs based on identifying, using the light sensor, that brightness around the electronic device exceeds the reference brightness.

[0120] For example, the method may include an operation in which the control circuit controls the turned-on one or more LEDs to emit light according to a first brightness based on identifying that the brightness around the electronic device is greater than the reference brightness and less than another reference brightness. The other reference brightness may be greater than the reference brightness. The method may include an operation in which the control circuit controls the turned-on one or more LEDs to emit light according to a second brightness that is greater than the first brightness based on identifying that the brightness around the electronic device is greater than the other reference brightness.

[0121] For example, the method may include an operation in which the control circuit detects a voltage of the capacitor, which is charged by the direct current power received from the converter while the alternating current power is converted into the direct current power based on the converter. The method may include an operation in which the control circuit controls the optocoupler of the power supply circuit to stop the power supply from the bridge circuit to the converter based on identifying that the detected voltage reaches another reference voltage higher than the reference voltage.

[0122] For example, the power supply circuit may further include a first transistor including a resistor having one end connected to the control circuit and the other end connected to the one end of the optical coupler, a gate electrode connected to the other end of the optical coupler, and a source electrode connected to ground, and a second transistor including a gate electrode connected to a drain electrode of the first transistor, a source electrode connected to the ground, and a drain electrode connected to the converter. The method may include an operation whereby the control circuit changes a level of a signal applied to the one end of the optical coupler of the power supply circuit to change states of the first transistor and the second transistor based on identifying that the detected voltage reaches the different reference voltage. The method may include an operation whereby the converter stops converting the AC power rectified by the bridge circuit into the DC power based on identifying a change in the state of the second transistor through the drain electrode of the second transistor.

[0123] For example, the method may include an operation in which the control circuit is deactivated while the conversion of the AC power source is interrupted based on the converter. The method may include an operation in which the control circuit detects the voltage of the capacitor as it is activated based on the cycle.

[0124] For example, the electronic device may further include a voltage comparator having one end including a non-inverter end to which a reference voltage is applied and an inverter end connected to the light sensor, and the other end connected to the control circuit. The method may include an operation in which the control circuit identifies, through the other end of the comparator, that a voltage corresponding to the reference voltage is applied from the light sensor to the comparator through the inverter end of the comparator. The method may include an operation in which the control circuit controls the optical coupler of the power supply circuit to supply the power from the bridge circuit to the converter based on identifying, through the inverter end of the comparator, that a voltage corresponding to the reference voltage is applied to the comparator.

[0125] For example, the method may include an operation in which the control circuit identifies the brightness around the electronic device using the light sensor. The method may include an operation in which the control circuit turns on the one or more LEDs based on identifying that the brightness around the electronic device exceeds the reference brightness.

[0126] For example, the electronic device may further include a transistor having a gate electrode connected to the control circuit, a source electrode connected to ground, and a drain electrode connected to the one or more LEDs. The method may include an operation in which the control circuit activates the transistor by sending a signal to the gate electrode of the transistor to turn on power to the one or more LEDs based on identifying, using the light sensor, that brightness around the electronic device exceeds the reference brightness.

[0127] For example, the method may include an operation in which the control circuit controls the turned-on one or more LEDs to emit light according to a first brightness based on identifying that the brightness around the electronic device is greater than the reference brightness and less than another reference brightness. The other reference brightness may be greater than the reference brightness. The method may include an operation in which the control circuit controls the turned-on one or more LEDs to emit light according to a second brightness that is greater than the first brightness based on identifying that the brightness around the electronic device is greater than the other reference brightness.

[0128] For example, the electronic device may further include a communication circuit connected to the control circuit. The light sensor may be composed of a plurality of light sensors. The method may include an operation in which the control circuit obtains values ​​for brightness around the electronic device using each of the plurality of light sensors. The method may include an operation in which the control circuit identifies a value having an error outside a reference range among the values ​​by comparing the values ​​with each other. The method may include an operation in which the control circuit, based on the identification of the value having an error outside the reference range among the values, transmits a signal to an external electronic device through the communication circuit to notify an illuminance sensor among the plurality of light sensors that has obtained the value.

[0129] The non-transitory computer-readable storage medium as described above may store one or more programs. The one or more programs may include instructions that, when executed by an electronic device having a power supply circuit including a bridge circuit connected to an external source and configured to rectify at least a portion of an AC power source from the external source, a light sensor, a control circuit connected to the light sensor, one or more LEDs whose brightness is controlled by the control circuit, a converter configured to supply DC power to the control circuit from the AC power source rectified by the bridge circuit, and an optical coupler for controlling the converter based on optical coupling, cause the control circuit to identify a brightness around the electronic device using the light sensor. The one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to turn off the one or more LEDs based on identifying that the brightness around the electronic device is less than a reference brightness. The one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to control the optical coupler of the power supply circuit to stop supplying power from the bridge circuit to the converter based on identifying that the brightness around the electronic device is less than a reference brightness.

[0130] For example, the power supply circuit may further include a resistor having one end connected to the control circuit and the other end connected to the one end of the optical coupler, a first transistor having a gate electrode connected to the other end of the optical coupler, and a source electrode connected to ground, and a second transistor having a gate electrode connected to a drain electrode of the first transistor, a source electrode connected to the ground, and a drain electrode connected to the converter. The one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to change a level of a signal applied to the one end of the optical coupler of the power supply circuit based on identifying, using the light sensor, that brightness around the electronic device is less than the reference brightness, so as to change states of the first transistor and the second transistor. The one or more programs may include instructions that, when executed by the electronic device, cause the converter to stop converting the AC power rectified by the bridge circuit into the DC power based on identifying a change in the state of the second transistor through the drain electrode of the second transistor.

[0131] For example, the electronic device may further include a transistor having a gate electrode connected to the control circuit, a source electrode connected to ground, and a drain electrode connected to the one or more LEDs. The one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to deactivate the transistor by sending a signal to the gate electrode of the transistor to turn off power to the one or more LEDs based on identifying, using the light sensor, that brightness around the electronic device is less than the reference brightness.

[0132] For example, the electronic device may further include a diode having an anode connected to one end of the converter and a capacitor connected to a cathode of the diode. The one or more programs, when executed by the electronic device, may include instructions that cause the capacitor to discharge so as to drive the control circuit and the light sensor while conversion of the AC power based on the converter is interrupted.

[0133] For example, the one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to detect a voltage of the capacitor. The one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to control the optocoupler of the power supply circuit to supply power from the bridge circuit to the converter based on identifying that the detected voltage is less than a reference voltage.

[0134] For example, the power supply circuit may further include a resistor having one end connected to the control circuit and the other end connected to the one end of the optical coupler, a first transistor having a gate electrode connected to the other end of the optical coupler, and a source electrode connected to ground, and a second transistor having a gate electrode connected to a drain electrode of the first transistor, a source electrode connected to the ground, and a drain electrode connected to the converter. The one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to change a level of a signal applied to the one end of the optical coupler of the power supply circuit to change states of the first transistor and the second transistor based on identifying that the detected voltage is less than the reference voltage. The one or more programs may include instructions that, when executed by the electronic device, cause the converter to convert the AC power rectified by the bridge circuit into the DC power based on identifying a change in the state of the second transistor through the drain electrode of the second transistor.

[0135] For example, the one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to identify brightness around the electronic device using the light sensor. The one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to turn on the one or more LEDs based on identifying that brightness around the electronic device exceeds the reference brightness.

[0136] For example, the electronic device may further include a transistor having a gate electrode connected to the control circuit, a source electrode connected to ground, and a drain electrode connected to the one or more LEDs. The one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to activate the transistor by sending a signal to the gate electrode of the transistor to turn on power to the one or more LEDs based on identifying, using the light sensor, that brightness around the electronic device exceeds the reference brightness.

[0137] For example, the one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to control the turned-on one or more LEDs to emit light at a first brightness based on identifying that a brightness around the electronic device is greater than the reference brightness and less than another reference brightness. The other reference brightness may be greater than the reference brightness. The one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to control the turned-on one or more LEDs to emit light at a second brightness that is greater than the first brightness based on identifying that a brightness around the electronic device is greater than the another reference brightness.

[0138] For example, the one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to detect a voltage of the capacitor that is charged by the direct current power received from the converter while the alternating current power is converted to the direct current power based on the converter. The one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to control the optocoupler of the power supply circuit to stop the power supply from the bridge circuit to the converter based on identifying that the detected voltage reaches another reference voltage that is higher than the reference voltage.

[0139] For example, the power supply circuit may further include a resistor having one end connected to the control circuit and the other end connected to the one end of the optical coupler, a first transistor having a gate electrode connected to the other end of the optical coupler, and a source electrode connected to ground, and a second transistor having a gate electrode connected to a drain electrode of the first transistor, a source electrode connected to the ground, and a drain electrode connected to the converter. The one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to change a level of a signal applied to the one end of the optical coupler of the power supply circuit to change states of the first transistor and the second transistor based on identifying that the detected voltage reaches the other reference voltage. The one or more programs may include instructions that, when executed by the electronic device, cause the converter to stop converting the AC power rectified by the bridge circuit into the DC power based on identifying a change in the state of the second transistor through the drain electrode of the second transistor.

[0140] For example, the one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to be deactivated while the conversion of the AC power based on the converter is interrupted. The one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to detect the voltage of the capacitor as it is activated based on a period.

[0141] For example, the electronic device may further include a voltage comparator having one end including a non-inverter end to which a reference voltage is applied and an inverter end connected to the light sensor, and the other end connected to the control circuit. The one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to identify, through the other end of the comparator, that a voltage corresponding to the reference voltage is applied from the light sensor to the comparator through the inverter end of the comparator. The one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to control the optocoupler of the power supply circuit for supplying power from the bridge circuit to the converter based on identifying that a voltage corresponding to the reference voltage is applied to the comparator through the inverter end of the comparator.

[0142] For example, the one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to identify brightness around the electronic device using the light sensor. The one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to turn on the one or more LEDs based on identifying that brightness around the electronic device exceeds the reference brightness.

[0143] For example, the electronic device may further include a transistor having a gate electrode connected to the control circuit, a source electrode connected to ground, and a drain electrode connected to the one or more LEDs. The one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to activate the transistor by sending a signal to the gate electrode of the transistor to turn on power to the one or more LEDs based on identifying, using the light sensor, that brightness around the electronic device exceeds the reference brightness.

[0144] For example, the one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to control the turned-on one or more LEDs to emit light at a first brightness based on identifying that a brightness around the electronic device is greater than the reference brightness and less than another reference brightness. The other reference brightness may be greater than the reference brightness. The one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to control the turned-on one or more LEDs to emit light at a second brightness that is greater than the first brightness based on identifying that a brightness around the electronic device is greater than the other reference brightness.

[0145] For example, the electronic device may further include a communication circuit connected to the control circuit. The light sensor may be composed of a plurality of light sensors. The one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to obtain values ​​for brightness around the electronic device using each of the plurality of light sensors. The one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to identify a value having an error outside a reference range among the values ​​by comparing the values ​​with each other. The one or more programs may include instructions that, when executed by the electronic device, cause the control circuit to transmit a signal to an external electronic device through the communication circuit, notifying an light sensor among the plurality of light sensors that has obtained the value, based on the identification of the value having an error outside the reference range among the values.

Claims

1. In electronic devices, A bridge circuit connected to an external source and configured to rectify at least a portion of said external alternating current power source; light sensor; A control circuit connected to the above light sensor; One or more LEDs whose brightness is controlled by the control circuit; A converter configured to supply direct current power to the control circuit from the alternating current power rectified by the bridge circuit; and A power supply circuit including an optical coupler for controlling the converter based on optical coupling, The above control circuit, Using the above light sensor, the brightness around the electronic device is identified, Based on identifying that the brightness around the electronic device is below the reference brightness: Turning off one or more of the LEDs; and configured to control the optical coupler of the power supply circuit to cut off the power supply from the bridge circuit to the converter. Electronic devices.

2. In claim 1, The above power supply circuit, A resistor comprising one end connected to the control circuit and the other end connected to one end of the optical coupler; A first transistor including a gate electrode connected to the other end of the optical coupler and a source electrode connected to ground, and Further comprising a second transistor including a gate electrode connected to the drain electrode of the first transistor, a source electrode connected to the ground, and a drain electrode connected to the converter, The above control circuit, Using the above light sensor, based on identifying that the brightness around the electronic device is less than the reference brightness, the level of the signal applied to the one end of the optical coupler of the power supply circuit is changed to change the states of the first transistor and the second transistor, and The above converter, configured to stop converting the AC power rectified by the bridge circuit into the DC power based on identifying a change in the state of the second transistor through the drain electrode of the second transistor. Electronic devices.

3. In claim 1, Further comprising a transistor having a gate electrode connected to the control circuit, a source electrode connected to ground, and a drain electrode connected to the at least one LED, The above control circuit, By using the above light sensor, based on identifying that the brightness around the electronic device is less than the reference brightness, a signal is transmitted to the gate electrode of the transistor to turn off the power of the one or more LEDs, thereby deactivating the transistor. Electronic devices.

4. In claim 1, a diode having an anode connected to one end of said converter; and Further comprising a capacitor connected to the cathode of the above diode; The above capacitor, configured to be discharged, to drive the control circuit and the light sensor while the conversion of the AC power is interrupted based on the converter; Electronic devices.

5. In claim 4, The above control circuit, Detecting the voltage of the above capacitor, and Based on identifying that the detected voltage is less than a reference voltage, the optical coupler of the power supply circuit is configured to control the power supply circuit to the converter from the bridge circuit. Electronic devices.

6. In claim 5, The above power supply circuit, A resistor comprising one end connected to the control circuit and the other end connected to one end of the optical coupler; A first transistor including a gate electrode connected to the other end of the optical coupler and a source electrode connected to ground, and Further comprising a second transistor including a gate electrode connected to the drain electrode of the first transistor, a source electrode connected to the ground, and a drain electrode connected to the converter, The above control circuit, Based on identifying that the detected voltage is less than the reference voltage, the level of the signal applied to the one end of the optical coupler of the power supply circuit is configured to be changed so as to change the states of the first transistor and the second transistor, and The above converter, A device configured to convert the AC power rectified by the bridge circuit into the DC power based on identifying a change in the state of the second transistor through the drain electrode of the second transistor. Electronic devices.

7. In claim 5, The above control circuit, Using the above light sensor, the brightness around the electronic device is identified, and configured to turn on said one or more LEDs based on identifying that the brightness around said electronic device exceeds said reference brightness; Electronic devices.

8. In claim 7, Further comprising a transistor having a gate electrode connected to the control circuit, a source electrode connected to ground, and a drain electrode connected to the at least one LED, The above control circuit, configured to activate the transistor by transmitting a signal to the gate electrode of the transistor to turn on power to the one or more LEDs based on identifying that the brightness around the electronic device exceeds the reference brightness using the light sensor; Electronic devices.

9. In claim 7, The above control circuit, Based on identifying that the brightness around the electronic device exceeds the reference brightness and is less than another reference brightness, controlling the one or more LEDs that are turned on to emit light according to the first brightness, and the other reference brightness exceeds the reference brightness, and configured to control the one or more LEDs turned on to emit light according to a second brightness that exceeds the first brightness, based on identifying that the brightness around the electronic device exceeds the other reference brightness; Electronic devices.

10. In claim 5, The above control circuit, While the AC power is converted into the DC power based on the converter, detecting the voltage of the capacitor charged by the DC power received from the converter; and configured to control the optical coupler of the power supply circuit to cut off the power supply from the bridge circuit to the converter based on identifying that the detected voltage reaches another reference voltage higher than the reference voltage. Electronic devices.

11. In claim 10, The above power supply circuit, A resistor comprising one end connected to the control circuit and the other end connected to one end of the optical coupler; A first transistor including a gate electrode connected to the other end of the optical coupler and a source electrode connected to ground, and Further comprising a second transistor including a gate electrode connected to the drain electrode of the first transistor, a source electrode connected to the ground, and a drain electrode connected to the converter, The above control circuit, Based on identifying that the detected voltage reaches the other reference voltage, the level of the signal applied to the one end of the optical coupler of the power supply circuit is configured to be changed so as to change the states of the first transistor and the second transistor, The above converter, configured to stop converting the AC power rectified by the bridge circuit into the DC power based on identifying a change in the state of the second transistor through the drain electrode of the second transistor. Electronic devices.

12. In claim 5, The above control circuit, While the conversion of the AC power source is interrupted based on the above converter, it is disabled, and configured to detect the voltage of said capacitor as it is activated based on the cycle, Electronic devices.

13. In claim 1, Further comprising a voltage comparator including one end including a non-inverter end to which a reference voltage is applied and an inverter end connected to the light sensor, and the other end connected to the control circuit; The above control circuit, Through the other terminal of the comparator, it is identified that a voltage corresponding to the reference voltage is applied from the light sensor to the comparator through the inverter terminal of the comparator, and Based on identifying that a voltage corresponding to the reference voltage is applied to the comparator through the inverter terminal of the comparator, the optical coupler of the power supply circuit is controlled to supply the power from the bridge circuit to the converter. Electronic devices.

14. In claim 13, The above control circuit, Using the above light sensor, the brightness around the electronic device is identified, configured to turn on said one or more LEDs based on identifying that the brightness around said electronic device exceeds said reference brightness; Electronic devices.

15. In claim 14, Further comprising a transistor having a gate electrode connected to the control circuit, a source electrode connected to ground, and a drain electrode connected to the at least one LED, The above control circuit, configured to activate the transistor by transmitting a signal to the gate electrode of the transistor to turn on power to the one or more LEDs based on identifying that the brightness around the electronic device exceeds the reference brightness using the light sensor; Electronic devices.

16. In claim 14, The above control circuit, Based on identifying that the brightness around the electronic device exceeds the reference brightness and is less than another reference brightness, controlling the one or more LEDs that are turned on to emit light according to the first brightness, and the other reference brightness exceeds the reference brightness, and configured to control the one or more LEDs turned on to emit light according to a second brightness that exceeds the first brightness, based on identifying that the brightness around the electronic device exceeds the other reference brightness; Electronic devices.

17. In claim 1, Further comprising a communication circuit connected to the above control circuit, The above light sensor is composed of a plurality of light sensors, The above control circuit, Using each of the above multiple light sensors, values ​​for brightness around the electronic device are obtained, By comparing the above values ​​with each other, the values ​​having errors outside the reference range are identified, and Based on identifying the value having an error outside the reference range among the above values, a signal is transmitted to an external electronic device through the communication circuit to notify the light sensor that has acquired the value among the plurality of light sensors. Electronic devices.

18. A method for executing in an electronic device having a power supply circuit including a bridge circuit connected to an external source and configured to rectify at least a portion of an AC signal from the external source, a light sensor, a control circuit connected to the light sensor, one or more LEDs whose brightness is controlled by the control circuit, a converter configured to supply DC power to the control circuit from the AC power rectified by the bridge circuit, and an optical coupler for controlling the converter based on optical coupling, The above control circuit, An operation of identifying the brightness around the electronic device using the above light sensor, Based on identifying that the brightness around the electronic device is below the reference brightness: An action of turning off one or more of the LEDs; and An operation for controlling the optical coupler of the power supply circuit to stop power supply from the bridge circuit to the converter, method.

19. In claim 18, The above power supply circuit, A resistor comprising one end connected to the control circuit and the other end connected to one end of the optical coupler; A first transistor including a gate electrode connected to the other end of the optical coupler and a source electrode connected to ground, and Further comprising a second transistor including a gate electrode connected to the drain electrode of the first transistor, a source electrode connected to the ground, and a drain electrode connected to the converter, The above method, The above control circuit, An operation of changing the level of a signal applied to the one end of the optical coupler of the power supply circuit to change the states of the first transistor and the second transistor based on identifying that the brightness around the electronic device is less than the reference brightness using the light sensor, and The above converter, An operation of stopping converting the alternating current rectified by the bridge circuit into the direct current based on identifying a change in the state of the second transistor through the drain electrode of the second transistor. method.

20. In a non-transitory computer-readable storage medium storing one or more programs, The one or more programs are executed by an electronic device having a power supply circuit including a bridge circuit connected to the outside and configured to rectify at least a portion of the external AC power, a light sensor, a control circuit connected to the light sensor, one or more LEDs whose brightness is controlled by the control circuit, a converter configured to supply DC power to the control circuit with the AC power rectified by the bridge circuit, and an optical coupler for controlling the converter based on optical coupling. Using the above light sensor, the brightness around the electronic device is identified, Based on identifying that the brightness around the electronic device is below the reference brightness: Turning off one or more of the LEDs; and To control the optical coupler of the power supply circuit to stop the power supply from the bridge circuit to the converter, Containing instructions causing the above control circuit to occur, A non-transitory computer-readable storage medium.

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