Lg Electronics Inc.

Korea Advanced Institute of Science and Technology

Chung Hee Lee

Woo Jin Song

Hyun Chool Shin

Kyu Young Hwang

Jong Hwa Kim

Dong Ho Cho

Jungkeun Park

Ju Yong Lee

U Hyun Kim

Gu Ho Jung

Dang-Oh Kim

A wireless power transmission device can include a plurality of transmission coil units, in which each of the plurality of transmission coil units includes a plurality of antenna coils arranged on different three-dimensional planes, and the plurality of antenna coils are configured to generate a magnetic field passing through at least one or more of the different three-dimensional planes to transfer transmission power to a wireless power reception device.

Wireless power transmission device

An apparatus and a method for correcting a distorted image is capable of correcting an optical distortion of an image and misconvergence by prewarping an inputted image without using a convergence yoke, and an image displayer using the same. The apparatus for correcting an image distortion for an image displayer in which an image signal is inputted to display an image on a screen and an image distortion is corrected, includes: a reference image generator for generating a predetermined reference image; a camera for inputting the reference image and photographing an image outputted on the screen; and a distortion information extracting unit for comparing the photographed image outputted from the camera and the reference image outputted from the reference image generator, and generating distortion correction information to correct a distortion of the photographed image in case that the image has been distorted.

Apparatus and method for correcting distortion of image and image displayer using the same

Disclosed is a video display an auto-convergence error in a projection television receiver (TV) capable of preventing generation of an error when an auto-convergence is performed. The apparatus includes a screen for displaying an image signal, first to eighth sensing units having first and second optical sensors for sensing a pattern displayed on the screen, first and second amplifying units for receiving and amplifying sensed values sensed by the first to fourth sensing units and the fifth to eighth sensing units with predetermined multiple amplification factors, first and second comparators for receiving and comparing amplified values outputted from the first and second amplifying units, an inverter for inverting output values of the first and second comparators, an operation unit for AND-gating the outputs of the amplifying units and outputs of the inverter, and a microcomputer for receiving an output of the operation unit, judging a degree of convergence correction, and outputting a corresponding control signal.

Apparatus for preventing auto-convergence error in projection television receiver

An apparatus and a method for compensating transmission power in a mobile terminal compensate a gain control value of a transmission signal by comparing transmission powers by power steps of a reference channel to those of respective channels. For above object, there is provided a method for compensating transmission power in the mobile terminal comprising: a step of detecting gain control values and transmission powers by power steps of a reference channel; a step of detecting transmission powers by power steps of respective channels by applying the gain control values of the reference channel to the respective channels; and a step of calculating a calibration gain control value for controlling the transmission power by comparing the transmission powers by power steps of the reference channel to those of the respective channels.

Apparatus and method for compensating transmission power in mobile terminal

Growing community of inventors

Taeku, South Korea

Chung Hee Lee