Sungkyunkwan University

Samsung Display Co., Ltd.

Kae Won Choi

Dong In Kim

Je Hyeon Park

Muhammad Miftahul Amri

Ju Young Choi

Nguyen Minh Tran

Minh Tran Nguyen

Myeong Chan Ha

Mihn Tran Nguyen

Min Jun Jeong

A display device includes: a display panel including a display layer and a touch layer; and a touch driving circuit connected to first electrodes and second electrodes of the touch layer. The touch driving circuit is to: determine frequencies of touch driving signals to be supplied to the first electrodes; assign the frequencies to the touch driving signals in an ascending order; determine a first phase of each of the touch driving signals that minimizes a cumulative value of PAPRs while sequentially varying phases of the touch driving signals; update the phases of the touch driving signals from the first phase to a second phase that minimizes the cumulative value of the PAPRs by sequentially varying the first phase of each of the touch driving signals; and output the touch driving signals based on the frequencies assigned to the touch driving signals, respectively, and the second phase.

Display device and mobile electronic device including same

Provided is a method for transmitting power in wireless communication using reconfigurable intelligent reflecting surfaces (RIS) of an electronic device, which includes: determining a value of a reflection coefficient of each unit cell or tile by scanning each tile of a reconfigurable intelligent reflecting surface (RIS) by a signal radiated through a transmitter; sending a beam to the reconfigurable intelligent reflecting surface (RIS) by controlling the transmitter; and multi-focusing an electromagnetic wave signal incident on the reconfigurable intelligent reflecting surface (RIS) on a plurality of receivers by setting an on/off state in each unit cell of the reconfigurable intelligent reflecting surface (RIS) based on the determined control parameter value, in which the tile is a partial array of the RIS having the same size, and supports far-field communication for the plurality of receivers.

Method and device for transmitting and receiving based on wireless communication using reconfigurable intelligent reflecting surfaces

Provided is a reflective intelligent reflecting surface (IRS) flexible board, which includes: a flexible film; and a plurality of unit cells formed on the flexible film, in which each of the plurality of unit cells includes an IC for adjusting a reflection phase, a line pattern for driving the IC, and first and second antenna patterns formed symmetrically to each other based on the IC or the line pattern.

Reflective intelligent reflecting surface flexible board

A power transmitting method of a wireless communication system includes a metasurface. The method includes transmitting power of a power supply device to a target device through the metasurface comprising N cells, where N is an integer; estimating, by the metasurface, a channel between the metasurface and the target device based on the power received by the target device and a property matrix with a magnitude of (N+1)&#xd7;(N+1); adjusting, by the metasurface, a phase of each cell of the N cells based on the estimated channel; and reflecting, by the metasurface, the power transmitted from the power supply device to the target device using the adjusted phase of each cell of the N cells. The property matrix includes information indicating whether each cell of the N cells is turned on and information about a bias value of the wireless communication system.

Method for transmitting power using metasurface in wireless communication system

A method for transmitting energy to a plurality of receiving nodes using a plurality of antennas includes: acquiring residual energy information of the receiving nodes and channel information between the antennas and the receiving nodes; determining a beamforming weight indicating a ratio between signals transmitted from the antennas and an awake ratio indicating a probability that the receiving nodes are in an active state to receive signals, based on the residual energy information and the channel information of each of the receiving nodes; generating beacon signals corresponding to the antennas based on either one or both of the beamforming weight and the awake ratio; and transmitting the beacon signals through the antennas.

Energy transmitting method and apparatus, energy receiving method, and receiving node

Disclosed is a beamforming method for microwave power transmission. The beamforming method includes sending, by a transmitter, microwaves to each training slot based on a random phase through antennas, receiving from a receiver, by the transmitter, a power measurement value for each of the training slots, estimating, by the transmitter, a channel using the received power measurement value, and determining, by the transmitter, beamforming weight based on information about the estimated channel.

Growing community of inventors

Seoul, South Korea

Kae Won Choi