Abstract:
A dust concentration display method is provided. The method includes (a) detecting a dust concentration through a dust sensor; (b) displaying a dew condensation message in a display in response to the detected dust concentration being equal to or more than a preset first dust concentration; and (c) detecting the dust concentration in real time for a preset time and displaying the dew condensation message in the display in response to the detected dust concentration being equal to or more than a preset second dust concentration.
Abstract:
A dust concentration display method is provided. The method includes (a) detecting a dust concentration through a dust sensor; (b) displaying a dew condensation message in a display in response to the detected dust concentration being equal to or more than a preset first dust concentration; and (c) detecting the dust concentration in real time for a preset time and displaying the dew condensation message in the display in response to the detected dust concentration being equal to or more than a preset second dust concentration.
Abstract:
A robot cleaner is disclosed. The robot cleaner includes an infrared sensor including a light emitting device configured to output an infrared ray to a floor and a light receiving device configured to receive the infrared ray reflected from the floor and convert the received infrared ray into an electric signal and output the electric signal; and a processor configured to determine an output voltage of the electrical signal if the electrical signal is received from the infrared sensor, control a travel direction of the robot cleaner based on the output voltage and a predetermined first threshold voltage, and control a suction mode of the robot cleaner based on the output voltage and a predetermined second threshold voltage, wherein the second threshold voltage is higher than the first threshold voltage.
Abstract:
A light emitting diode (LED) lighting apparatus boosts alternating current (AC) power output from a ballast, rectifies the boosted AC power to direct current (DC) power, blocks generation of an inrush current while the boosted AC power is rectified, and controls an operation of an LED by using the DC power.
Abstract:
A light emitting diode (LED) lighting apparatus boosts alternating current (AC) power output from a ballast, rectifies the boosted AC power to direct current (DC) power, blocks generation of an inrush current while the boosted AC power is rectified, and controls an operation of an LED by using the DC power.