Sunnyic Corporation

Seoul National University

Hanwha Techwin Co., Ltd.

Korea Telecom

Sun-Jung Kim

Jin Young Choi

Jeong-Eun Lim

Il-Kwon Chang

Kwang Moo Yi

Young-Sook Lim

Ki-Min Yun

Kyung-Hee Kang

Soo-Wan Kim

Seong-Hyoen Yang

The present invention provides a semiconductor integrated circuit for detecting leakage current to determine whether an electric leakage occurs in an electric line based on an induced voltage input from a leakage current detection unitinstalled in the electric line, and an earth, leakage circuit breaker having the semiconductor integrated circuit. A semiconductor integrated circuitfor detecting leakage current includes: a signal amplification unitconfigured to amplify the induced voltage; an interruption determination unitconfigured to compare an output voltage output from the signal amplification unit with a preset reference voltage, and output an interruption signal for interrupting a power supply to the electric line; a flare current stabilization (FCS) circuitfor a signal amplification unit connected to the signal amplification unit; and a flare current stabilization (FCS) circuitfor an interruption determination unit connected to the interruption determination unit.

Semiconductor integrated circuit for detecting leakage current and earth leakage circuit breaker having the same

A semiconductor integrated circuit for leak current detection which outputs an interruption signal to cut off electrical power supplied by a power supply to an electric line if a leakage current occurs including a leakage current processing unit and an output unit configured to output the interruption signal. The leakage current processing unit includes: a zero-power supply voltage detector; a counter when the power supply voltage pulse signal is input; a zero-input induction voltage detector configured to output a leakage current pulse signal whenever the input induction voltage becomes 0 V; a counter latch configured to latch a count value supplied by the counter and output the latched count value; an output induction voltage setting unit configured to calculate an output induction voltage; and a comparator configured to compare the output induction voltage with a predetermined trip level.

Integrated earth leakage current detector and breaker circuit

An apparatus for detecting an object includes a filter for filtering a current input image and a background model generated based on a previous input image, a homography matrix estimation unit for estimating a homography matrix between the current input image and the background model, an image alignment unit for converting the background model by applying the homography matrix to a filtered background model and aligning a converted background model and a filtered current input image, and a foreground/background detection unit for detecting a foreground by comparing corresponding pixels between the converted background model and the filtered current input image.

Apparatus and method for detecting object using PTZ camera

A method for distributively managing the CRL in a certifying system to certify the validity of a subscriber in an open communications network such as Internet, includes the steps of registering the certificate policy statement for the CRL by determining the distribution interval of the CRL; setting the structure of the certificate of the subscriber to issue the certificate according to the registered certificate policy statement; attesting the certificate by applying the distribution point mechanism according to the distribution interval to the CRL; and revoking the certificate by using the distribution points to revise the CRL displayed.

Method for managing certificate revocation list by distributing it

Growing community of inventors

Seoul, South Korea

Sun-Jung Kim