Abstract: A following method of a mobile robot based on electromagnetic positioning includes the following steps. Acquiring electromagnetic signals sent to one or more receiving modules by a transmitting module, and obtaining position and orientation information of the one or more receiving modules relative to the transmitting module; determining whether the mobile robot is in a single-person following mode or a multi-person following mode; following a single one of one or more pedestrian targets using a linear acceleration and an angular acceleration of the mobile robot when the mobile robot is determined to be in the single-person following mode; and finding an average value of the position and orientation information and following multiple of the one or more pedestrian targets using the linear acceleration and the angular acceleration of the mobile robot when the mobile robot is determined to be in the multi-person following mode.

Abstract: A lighting device includes a light source module, a rectification module, a power supply module, a detection module and a control module. The rectification module generates a rectified voltage. The power supply module is connected to the rectification module and the light source module, and includes a power factor correction unit and a voltage conversion unit. The power supply module receives the rectified voltage to generate a driving voltage so as to drive the light source module. The detection module is connected to the power supply module, and includes a first detection unit for detecting the power factor correction unit and a second detection unit for detecting the voltage conversion unit. The control module is connected to the detection module, and includes a backup power unit. The control module controls the backup power unit according to the detection results of the first detection unit and the second detection unit.

Abstract: A lighting device with fault detection and self-locking control function, which includes a light-emitting module, a power module, a voltage detection module, a signal conversion module, a self-locking control module and a signal control module. The power module drives the light-emitting module. The voltage detection module detects the driving voltage of the light-emitting module to generate a detection signal. The signal conversion module converts the detection signal into an operating status signal. The self-locking control module controls the power module. The signal control module controls the self-locking control module according to the operating status signal. The signal control module activates the self-locking control module when the operating status signal is in an abnormal state, and the self-locking control module controls the power module to stop driving the light-emitting module and enter a self-locking state.

Abstract: A lighting device includes an input module, a first light-emitting module, a second light-emitting module, and a current adjusting module. The input module includes a first input terminal and a second input terminal. The first light-emitting module includes a plurality of first light sources connected in series. One end of the first light-emitting module is connected to the first input terminal. The second light-emitting module includes a plurality of second light sources connected in series. One end of the second light-emitting module is connected to the first input terminal. The current adjusting module includes a first switch and a second switch. The other end of the first light-emitting module is connected to the second input terminal via the first switch, and the other end of the second light-emitting module is connected to the second input terminal via the second switch. The first switch is connected to the second switch.

Abstract: A flyback converter with electromagnetic interference suppression function includes an input end, an output end, a rectifying element, and a transformer. The output end includes a first output terminal and a second output terminal. The transformer includes a primary winding, a first secondary winding, and a second secondary winding. The primary winding is connected to the input end. The upper terminal of the first secondary winding is connected to the first output terminal, and the lower terminal of the first secondary winding is connected to the first end of the rectifying element. The upper terminal of the second secondary winding is connected to the second end of the rectifying element, and the lower terminal of the second secondary winding is connected to the second output terminal.

Abstract: A lighting device having multi-stage chip power supplying mechanism capable of improving driving efficiency includes a light-emitting module, a rectifying module, a pre-startup module, a power factor correction module, a voltage converting module and an auxiliary power source module. The rectifying module generates a rectified voltage. The pre-startup module receives the rectified voltage to enter on state and converts he rectified voltage into a pre-startup voltage. The power factor correction module receives the pre-startup voltage to enter on state and converts the rectified voltage into a corrected voltage. The voltage converting module converts the corrected voltage into a driving voltage to drive the light-emitting module. The voltage converting module includes a voltage extracting unit for converting the driving voltage into an output voltage according to a default converting ratio.

Abstract: A lighting device having hormonic suppressing function includes an input module, hormonic suppressing module, a rectifying module, a filtering module, a voltage converting module and a light source module. The hormonic suppressing module is connected to the input module, and includes an inductor a capacitor and a thermistor. The rectifying module is connected to the hormonic suppressing module. The filtering module is connected to the rectifying module. The voltage converting module is connected to the filtering module. The light source module is connected to the voltage converting module. The hormonic suppressing module is disposed between the input module and the rectifying module.

Abstract: A lighting device includes a dimming module, a control module, a rectifier module and a light-emitting module. The control module is connected to the dimming module and saves a lookup table. The rectifier module is connected to the dimming module and control module. The rectifier module generates a rectified voltage to drive the dimming module and control module. The light-emitting module is connected to the dimming module and control module. The control module outputs an initial dimming signal to control the dimming module to output an initial drive signal so as to drive the light-emitting module. The control module detects the current operating voltage of the light-emitting module, and compares the current operating voltage with the lookup table to generate a target dimming signal corresponding thereto, such that the dimming module is controlled by the target dimming signal to generate a target driving signal to drive the light-emitting module.

Abstract: A light-emitting diode (LED) light source having high luminous efficiency includes a substrate, a positive electrode pad, a negative electrode pad, a first LED chip and a second LED chip. The positive electrode pad is disposed on the substrate. The negative electrode pad is disposed on the substrate, and there is a groove formed between the negative electrode pad and the positive electrode pad. The first LED chip is disposed on the positive electrode pad, and electrically connected to the positive electrode pad and negative electrode pad. The second LED chip is disposed on the negative electrode pad, and electrically connected to the positive electrode pad and negative electrode pad. A portion of the first LED chip protrudes from the positive electrode pad and covers a portion of the groove.

Abstract: A lighting device includes a rectifying circuit, first filtering capacitor, resistor element, transient current suppressing circuit and voltage divider circuit. The two ends of the first filtering capacitor are connected to a first node and second node respectively. The two ends of the resistor element are connected to the second node and third node respectively. The transient current suppressing circuit includes a switch and first adjusting capacitor. The three ends of the switch are connected to a fourth node, second node and third node respectively. The two ends of the first adjusting capacitor are connected to the second node and third node respectively. The two ends of the voltage divider circuit are connected to the first node and fourth node respectively. The first node, third node and second node are connected to the first and second output ends of the rectifying circuit and grounding point respectively.

Abstract: A light-emitting diode (LED) device with afterglow-proof function includes a common positive electrode, a common negative electrode and a LED lighting module. The common positive electrode is connected to the positive electrode of an external power source. The common negative electrode is connected to the negative electrode of the external power source. One end of the LED lighting module is connected to the common positive electrode and the other end of the LED lighting module is connected to the common negative electrode. The LED lighting module includes a plurality of LED lighting units connected to each other in series. Each of the LED lighting units includes a light source and a capacitor connected to each other in parallel. The circuit design can realize the afterglow-proof function in order to prevent the afterglow effect of the LED lighting device.

Abstract: An air treatment device and a control method are provided. The air treatment device includes a water tank assembly, a water trough and a sterilization device. The sterilization device includes a sterilization portion, the sterilization portion is provided in the water trough, a water replenishing switch is provided between the water tank assembly and the water trough, and the water replenishing switch is configured to control connection and disconnection between the water tank assembly and the water trough. The air treatment device further includes a control portion, and the control portion is capable of controlling an opening and closing of the sterilization portion according to an on-off state of the water replenishing switch to ensure a good sterilization effect.

Abstract: A lighting device includes a light source positive electrode, light source negative electrode, driving power source, substrate, first connecting portion, second connecting portion and light-emitting module. The driving power source has a power source positive electrode and power source negative electrode. The substrate has a light source connecting portion and electrical connecting portion connected to each other. The electrical connecting portion is connected to the power source negative electrode. One end of the first connecting portion is connected to the power source positive electrode. The two ends of the second connecting portion are connected to the other end of the first connecting portion and the light source positive electrode. The light-emitting module includes a first light source module and a second light source module. The first light source module and the second light source module are connected to the light source positive electrode and the light source connecting portion.

Abstract: Some embodiments of the present disclosure provide a humidifier, the humidifier includes: a humidifier body, provided with a first air inlet; and an inner tub, provided in the humidifier body and internally provided with an air passage, a fan being provided in the air passage, the inner tub being provided with a second air inlet, the second air inlet and the first air inlet being communicated with an air inlet of the fan, and the portion of the inner tub above the second air inlet being provided with a blocking surface, which is provided opposite to at least a part of the first air inlet.

Abstract: Some embodiments of the present disclosure provide an anti-splash structure and a humidification apparatus. The anti-splash structure is provided between a mist outlet (111) and a water storage reservoir (101) of the humidification apparatus, and includes a mist-guiding passage (1) configured to connect the mist outlet (111) and the water storage reservoir (101); a water blocking structure is provided in the mist-guiding passage (1); and the water blocking structure is located at a position opposite to the mist outlet (111) and an opening of the water storage reservoir (101).

Abstract: A lighting device control system having function detecting mechanism includes an active function detecting device and a control device. The active function detecting device is connected to an external power source and a lighting device, and includes an active detecting signal generating module and a function detecting module. The active detecting signal generating module transmits a dimming signal and a color temperature signal to the lighting device. The active detecting module detects the input current of the lighting device and the color temperature of the light emitted by the lighting device so as to generate a dimming function detecting result and a color temperature adjusting function detecting result. The control device generates a function analysis result according to the dimming function detecting result and the color temperature adjusting function detecting result, and display a control page corresponding to the function analysis result according to the function analysis result.

Abstract: A light-emitting diode (LED) lamp having high color-rendering property includes a lamp housing, a light source board, a plurality of white LEDs and a plurality of purple LEDs. The light source board is disposed in the lamp housing. The white LEDs are disposed on the light source board. The purple LEDs are disposed on the light source board. The wavelength range of the lights emitted by the purple LEDs is within the ultraviolet A (UVA) band.

Abstract: A high-efficiency LED driving circuit includes a rectifying module, a power converting module and a power supply module. The power converting module is connected to the rectifying module and a load, and includes a controller. The load includes a plurality of LEDs. The power input pin of the controller is connected to a connecting point and the connecting point is disposed between two of the LEDs. The quantity of the LEDs can be 2 or more than 2. The circuit design of the driving circuit can effectively reduce the power consumption and heat generation thereof, such that the reliability of the driving circuit can be effectively enhanced.

Abstract: A high-efficiency LED driving circuit includes a rectifying module, a power converting module and a power supply module. The power converting module is connected to the rectifying module and a load, and includes a controller. The load includes a plurality of LEDs. The power input pin of the controller is connected to a connecting point and the connecting point is disposed between two of the LEDs. The quantity of the LEDs can be 2 or more than 2. The circuit design of the driving circuit can effectively reduce the power consumption and heat generation thereof, such that the reliability of the driving circuit can be effectively enhanced.

Abstract: Some embodiments of the present disclosure provide a water softener, a humidifier base, and a humidifier. The water softener includes: a housing internally provided with a resin cavity and sequentially provided with a water inlet and a water outlet along a flowing direction of a water flow; a snap provided on the housing; and a positioning column provided on the end of the housing corresponding to the water inlet and extending toward a direction away from the housing. By providing the snap and the positioning column, when the water softener needs to be assembled, it is merely required to mount the snap and the positioning column to the corresponding parts of one humidifier; in this case, a water flow will enter the water softener through the water inlet to implement a subsequent water softening operation.