Abstract: A method and a system for recognizing an input by using an index of a variable grid are disclosed. An input recognition method carried out by an electronic device implemented by a computer comprises the steps of: generating a virtual grid of which the distance between lines is variable, in correspondence with at least a partial region of a display included in or connected to the electronic device; and recognizing, by using an index of the virtual grid, a position selected by a user of the electronic device in the region of the display corresponding to the virtual grid.

Abstract: Disclosed are a method and a system for providing an indoor positioning service. A method for providing an indoor positioning service comprises receiving a request to provide an indoor positioning service from a user terminal; receiving, in response to the request, information for wireless access points located near the user terminal; calculating the similarity between the items of information, and accuracy of the locations of the wireless access points on the basis of the received information for the wireless access points and information for the wireless access point collected from each point positioned inside the building; and determining the current location of the user terminal on the basis of the similarity and accuracy of the location.

Abstract: Disclosed are methods and systems for providing a location-based service. A location-based service providing method for determining a current location of a user terminal by interworking with a server including receiving a request to provide a location-based service, in response to the request, requesting and receiving first information about a wireless access point associated with a first building where the user terminal is located from the server; collecting second information about the wireless access point located near the user terminal, and determining a current location of the user terminal based on the first information and the second information may be provided.

Abstract: A digital painting device and method. The digital painting device includes a generator to generate a color generation signal corresponding to color data in an electronic palette selected by an electronic brush, and a displayer to transmit the color generation signal to a light-emitting module that touches the electronic brush in a time period in which the color generation signal is maintained such that the color data is displayed on the light-emitting module.

Abstract: Disclosed herein are a method for recognizing a table for an electronic menu system based on visible light and an apparatus for the same. The method includes receiving, by a visible light receiver connected to a smart device provided to a customer in a restaurant, multiple visible light signals from multiple lamps installed in the restaurant; detecting at least one valid signal from the multiple visible light signals in consideration of the multiple visible light signals and sensor data collected from a sensor installed in the smart device; and recognizing a table at which the customer is sitting using table information included in the at least one valid signal.

Abstract: Disclosed herein are a lighting control switch using magnetic sensing and touch sensing and a method using the lighting control switch. The lighting control switch includes a magnetic sensing module for generating a magnetic sensing signal by sensing a magnetic signal that is generated in order to control a lighting device, a touch-sensing module for generating a touch-sensing signal by sensing a touch signal that is generated in order to control the lighting device, and a control unit for receiving the magnetic signal and the touch signal based on logic control in response to generation of at least one of the magnetic sensing signal and the touch-sensing signal and controlling the lighting device by generating a control signal in consideration of the magnetic signal and the touch signal.

Abstract: A method and a system for providing integrated indoor and outdoor positioning are disclosed. The method for providing integrated positioning may comprise the steps of: receiving, by a user terminal, GPS coordinate information of the user terminal moving in an outdoor area around a building and an outdoor area within the building; and determining, by the user terminal, information on an area in which the user terminal is located and a floor on which the user terminal is located in the building, on the basis of GPS coordinate information mapped to each of the outdoor area around the building and the outdoor area within the building and the received GPS coordinate information.

Abstract: Disclosed herein are a lighting control switch using magnetic sensing and touch sensing and a method using the lighting control switch. The lighting control switch includes a magnetic sensing module for generating a magnetic sensing signal by sensing a magnetic signal that is generated in order to control a lighting device, a touch-sensing module for generating a touch-sensing signal by sensing a touch signal that is generated in order to control the lighting device, and a control unit for receiving the magnetic signal and the touch signal based on logic control in response to generation of at least one of the magnetic sensing signal and the touch-sensing signal and controlling the lighting device by generating a control signal in consideration of the magnetic signal and the touch signal.

Abstract: Disclosed are methods and systems for providing a location-based service. A location-based service providing method for determining a current location of a user terminal by interworking with a server including receiving a request to provide a location-based service, in response to the request, requesting and receiving first information about a wireless access point associated with a first building where the user terminal is located from the server; collecting second information about the wireless access point located near the user terminal, and determining a current location of the user terminal based on the first information and the second information may be provided.

Abstract: Disclosed herein is visible light communication technology having improved reception performance regardless of dimming control of lighting based on VPPM signals. A visible light communication apparatus includes a preamble generator for generating a preamble signal, a header generator for generating a PHY header, which includes information about the physical layer of a transmission packet and dimming information including the target dimming level of the transmission packet, a fixed dimming VPPM modulator for modulating the PHY header into a first VPPM signal according to a predetermined ratio, a transmission unit signal processor for generating transmission data by performing signal processing for data to be transmitted, a variable dimming VPPM modulator for modulating the transmission data into a second VPPM signal having the target dimming level of the transmission packet, and a signal synthesizer for forming the transmission packet by combining the first and second VPPM signals.

Abstract: Disclosed herein is a method of performing visible-light wireless communication using light-emitting diode (LED) illumination, in which Variable Pulse Position Modulation (VPPM) is used for low-speed data transmission and dimming of illumination, and orthogonal frequency division multiplexing (OFDM) modulation is used in a VPPM on period for high-speed data transmission.

Abstract: A method of providing data using visible light communication (VLC) and a VLC system therefor is provided, the method for easy utilization, in a user terminal, of information provided by a lighting apparatus based on a position at which the lighting apparatus is provided.

Abstract: Disclosed herein are an apparatus and method for visible light communication using electrically switchable glass. The apparatus for visible light communication using the electrically switchable glass includes a reception unit for receiving a data signal, a control unit for generating current and voltage corresponding to the data signal and controlling the transmittance of the electrically switchable glass based on the current and the voltage, and a transmission unit for adjusting the brightness of visible light that passes through the glass based on the transmittance and performing visible light communication using the visible light that has passed through the glass.

Abstract: Disclosed are an apparatus and method for testing a luminaire based on USB. The apparatus for testing a luminaire based on USB includes a power measurement unit for measuring power consumption by measuring power input from a host system to a luminaire based on USB; a message interpretation unit for generating a result of interpretation of a message based on a USB-based control message sent and received between the host system and the luminaire; an illuminance reception unit for receiving a result of measurement of illuminance of the luminaire, measured by a light reception device; and an information generation unit for generating test result information based on a result of the measurement of the power consumption, the result of the interpretation of the message, and the result of the measurement of the illuminance.

Abstract: Disclosed are a method and a system for providing an indoor positioning service. A method for providing an indoor positioning service comprises receiving a request to provide an indoor positioning service from a user terminal; receiving, in response to the request, information for wireless access points located near the user terminal; calculating the similarity between the items of information, and accuracy of the locations of the wireless access points on the basis of the received information for the wireless access points and information for the wireless access point collected from each point positioned inside the building; and determining the current location of the user terminal on the basis of the similarity and accuracy of the location.

Abstract: Disclosed herein is a method of performing visible-light wireless communication using light-emitting diode (LED) illumination, in which Variable Pulse Position Modulation (VPPM) is used for low-speed data transmission and dimming of illumination, and orthogonal frequency division multiplexing (OFDM) modulation is used in a VPPM on period for high-speed data transmission.

Abstract: An apparatus and method for providing indoor location information are disclosed herein. The apparatus includes a signal reception unit, a global positioning system (GPS) data reception unit, a frame generation unit, a scheduling unit, and a signal transmission unit. The signal reception unit receives a lighting control frame from a lighting control device. The GPS data reception unit receives location data from GPS satellites. The frame generation unit generates a location data frame by extracting the location of an illumination light stored in a lighting arrangement storage unit, modifying the location data and adding a header to the modified location data. The scheduling unit schedules the lighting control frame or the location data frame. The signal transmission unit transfers the lighting control frame or the location data frame to the corresponding illumination light based on the results of the scheduling of the scheduling unit.

Abstract: A method and apparatus for controlling Zigbee wireless lighting are disclosed. The apparatus for controlling Zigbee wireless lighting includes an address management unit, a packet conversion unit, and a client unit. The address management unit detects a Zigbee wireless address, corresponding to a light ID included in a command received from a user terminal, in an address management table. The packet conversion unit converts the command into a Zigbee light link (ZLL)-based packet. The client unit transfers the ZLL-based packet to Zigbee wireless illumination light corresponding to the Zigbee wireless address in order to control the Zigbee wireless illumination light.

Abstract: A lighting control device and method are disclosed herein. The lighting control device includes a control unit and a control request unit. The control unit sets up a virtual multiple lighting control unit corresponding to a lighting control command received from a lighting management device. The control request unit selects a wireless light fixture corresponding to a light fixture ID included in the lighting control command, and makes a lighting control request to the selected wireless light fixture. The control unit transfers a response to the lighting control request to the lighting management device, and thus allows a corresponding lighting switch to control the wireless light fixture.

Abstract: Disclosed herein is visible light communication technology having improved reception performance regardless of dimming control of lighting based on VPPM signals. A visible light communication apparatus includes a preamble generator for generating a preamble signal, a header generator for generating a PHY header, which includes information about the physical layer of a transmission packet and dimming information including the target dimming level of the transmission packet, a fixed dimming VPPM modulator for modulating the PHY header into a first VPPM signal according to a predetermined ratio, a transmission unit signal processor for generating transmission data by performing signal processing for data to be transmitted, a variable dimming VPPM modulator for modulating the transmission data into a second VPPM signal having the target dimming level of the transmission packet, and a signal synthesizer for forming the transmission packet by combining the first and second VPPM signals.