Electronics and Telecommunications Research Institute

Amkor Technology, Inc.

Sung Chang Co., Ltd

Other

Lg Electronics Inc.

Sungchang Energy Lab

Korea Advanced Institute of Science and Technology

Korea Telecom

Sung Chang Telecom Co., Ltd.

Sunchang Telecom Co., Ltd.

Telecommunication & Electronics Inc.

Jae Jin Lee

Kwang Eui Pyun

Min Gun Kim

Jae Hak Yee

Young Suk Chung

Chang Seok Lee

Jae Hun Ku

Terry W Davis

Sang Hyun Ryu

Jae Sung Kwak

Chung Suk Han

Jin Yong Kim

Sang Woon Suh

Nak Woong Eum

Seong Mo Park

Jun Young Lee

Moo Kyoung Chung

Joo Hyun Lee

Kyo Beum Lee

Kyung Su Kim

Eung Gie Oh

Jun Taek Lee

Seung Hyun Cho

Sung Weon Kang

Jung Woo Lee

Jae Kyoung Mun

Min Jae Lee

Chul Soon Park

Byung Jun Kim

Min Kyun Yoo

Jae Dong Kim

Hyung Ju Lee

Dong Yun Jung

Dae Byoung Kang

Sung Sik Jang

Young Su Kwon

Joon Dong Kim

Tae Heon Lee

Mu Hwan Seo

Hee Sung Kim

Dong Jean Kim

Chung Hwan Kim

Ki Chan Eun

Chang Hee Jung

Ku Sun Hong

Jeon Wook Yang

Joo Hyum Lee

Sang Yong Han

Sung Wan Ro

Jun Su Lee

Bo Hyung Lee

Yeoung Beom Ko

Heui Gi Son

Dae Seob Lim

Kwang Jun Yun

Min Kun Kim

Choong Hwan Kim

Ingab Hwang

Jae Seung Yoon

Provided is a system for time synchronization between a server and an Internet-of-Things (IoT) device. The system may include a server configured to broadcast a time-point synchronization signal including absolute time point information; and an IoT device configured to receive the broadcast time-point synchronization signal and calculate absolute time point information by using the absolute time point information included in the time-point synchronization signal, computation time information according to an internal computation operation, and transmission time information required to receive the time-point synchronization signal.

System for time synchronization between server and IoT device

A solar module installation method for efficient use of sunlight according to the present invention comprises the steps of: determining a reflection panel inclination angle of a solar reflection panel such that the panel is inclined by a predetermined angle with respect to a virtual horizontal plane; calculating a second projection distance by using a first projection height, a second projection height, and a first projection distance; and determining a panel inclination angle between the solar panel and a second virtual horizontal plane or determining the length of the solar panel so that the other end of the solar panel is positioned at the calculated second projection distance, and installing a solar module according to the determined panel inclination angle or panel length.

Solar module installation method for efficient use of sunlight

A system for street light lighting control and for Internet-of Things control for monitoring solar power generation includes a solar panel configured to generate photovoltaic-based electricity using sunlight; a battery configured to store the electricity generated by the solar panel; a solar controller configured to control the battery to store the electricity; and a street light controller configured to control lighting of at least one street light using the electricity stored in the battery, wherein the solar controller includes a battery information detection module configured to detect remaining charge information and discharging time information, which are charging/discharging status information of the battery and a communication module configured to transmit the remaining charge information and discharging time information to a monitoring server, wherein the communication module transmits the charging/discharging status information, the remaining charge information, and the discharging time information to the monitoring server through a low-power wide area network.

System for street light lighting control and for IOT control for monitoring solar power generation

Disclosed is a gateway apparatus for photovoltaic power generation facilities. The gateway apparatus includes a first communication portion which performs short-range wireless communication with at least one of a photovoltaic module connection board, a photovoltaic inverter, a peripheral environment sensing apparatus, a power measuring apparatus, and an energy storage system (ESS), a second communication portion which performs wired communication or wireless communication with a remote server, and a control portion which controls operations of the first communication portion and the second communication portion. Here, the control portion controls information provided from one or more of the photovoltaic module connection board, the photovoltaic inverter, the peripheral environment sensing apparatus, and the power measuring apparatus to be transmitted to the ESS.

Gateway apparatus for controlling power of photovoltaic power generation facilities

The sunlight sensing apparatus includes a sensor portion which includes a first sensor sensing sunlight in a first direction and a second sensor sensing the sunlight in a second direction for altitude adjustment and includes a third sensor sensing the sunlight in a third direction and a fourth sensor sensing the sunlight in a fourth direction for horizontal rotation, in which the first sensor, the second sensor, the third sensor, and the fourth sensor are formed of the solar cells, a power supply portion which charges sensor power formed at the first sensor, the second sensor, the third sensor, and the fourth sensor through a photoelectric effect caused by the sunlight, and a control portion which performs a control operation for transmitting sensing signals. Here, the control portion is driven by the sensor power charged by the power supply portion.

Sunlight sensing apparatus of sunlight tracker comprising plural sensors with a control operation driven by the sensor power charged by a power supply portion

Disclosed is a method of controlling a cluster of solar trackers in which a plurality of solar trackers exist as a cluster shape. The method includes detecting, by each of the cluster of solar trackers, one or more of power generation amount information, altitude information, and azimuth information thereof and transmitting the detected power generation amount information, altitude information, or azimuth information to a server, calculating, by the server, average power generation amount information, average altitude information, or average azimuth information using the power generation amount information, altitude information, or azimuth information of each of the cluster of solar trackers, and determining whether the cluster of solar trackers is normal by comparing the calculated average power generation amount information, average altitude information, or average azimuth information with the power generation amount information, altitude information, or azimuth information detected by each of the cluster of solar trackers.

Method and system for controlling cluster of solar trackers

A solar tracker having a brake function is disclosed. The solar tracker according to an embodiment of the present invention relates to a technology having a dual position sensing device provided at a part at which altitude adjustment and horizontal rotation of a solar collector plate respectively end, such that a brake is accurately operated for a driving motor, which is respectively in charge of altitude adjustment and horizontal rotation.

Solar tracker having brake function

Disclosed is a direct current uninterruptible power supply system. The direct current uninterruptible power supply system according to an embodiment of the present invention is electrically connected to a direct current power converter for converting commercial alternating current power to direct current power, in order to: supply the direct current power to a load and charge an auxiliary power supply device therein with the direct current power. In the case of a short circuit of the direct current power converter due to a current leakage or breakage of the direct current power converter, or if the direct current power converter is disconnected, the direct current uninterruptible power supply system enables the auxiliary power supply device to constantly supply power to the load while completely blocking the electrical connection to the direct current power converter.

Direct current uninterruptible power supply system

A semiconductor package that includes EMI shielding and a fabricating method thereof are disclosed. In one embodiment, the fabricating method of a semiconductor package includes forming a substrate, attaching semiconductor devices to a top portion of the substrate, encapsulating the semiconductor devices using an encapsulant, forming a trench in the encapsulant, and forming a shielding layer on a surface of the encapsulant.

Semiconductor package and fabricating method thereof

Disclosed herein is a direct current (DC) uninterruptible power supply system. The DC uninterruptible power supply system is connected to a DC power conversion system converting prevailing alternating current (AC) power into DC power, supplies the DC power to a load, charges an internal auxiliary power supply device with the DC power, and continuously supplies power to the load from the auxiliary power supply device while cutting off an electric connection with the DC power conversion system when the DC power conversion system short-circuits due to a leakage current or damage thereof or is disconnected.

Provided is an uninterruptible direct current (DC) power supply system, which includes a first connection unit electrically connected to a DC power conversion system which converts prevailing AC power into the DC power, a second connection unit which is electrically connected to the load and supplies the DC power to the load, an auxiliary power supply charged by the DC power, and an uninterruptible control unit which supplies the DC power supplied from the DC power conversion system normally connected to the first connection unit to the load through the second connection unit, charges the auxiliary power supply, and controls power to be continuously supplied to the load while perfectly cutting off electrical connection between the DC power conversion system and the auxiliary power supply when the DC power conversion system is disconnected from the first connection unit, is damaged, or short-circuits.

Uninterruptable DC power supply providing seamless DC power to load

Provided are an apparatus and method for multicore emulation based on dynamic context switching. The apparatus for multicore emulation based on dynamic context switching includes a multicore emulation managing unit configured to transmit a signal for requesting determination of a core to be emulated among a plurality of cores, and a context switching managing unit configured to receive the signal for requesting determination of a core to be emulated from the multicore emulation managing unit, determine an ID of a core to be emulated according to the received signal, and executing emulation on a core corresponding to the determined core ID.

Apparatus and method for multicore emulation based on dynamic context switching

Provided is a self-powered solar tracker, which is a solar tracker for adjusting the altitude of and horizontally rotating a solar collector panel such that the solar collector panel on which a plurality of solar cells are provided can face the sun, wherein the self-powered solar tracker comprises: an altitude adjustment optical sensor unit which has one or more first optical sensors formed by being uniformly spaced on the upper side of convex support surfaces to face the sun and one or more second optical sensors formed by being uniformly spaced on the lower side of the convex support surfaces, and which senses the sunlight so as to adjust the altitude of the solar collector panel; a horizontal rotation optical sensor unit which has one or more third optical sensors formed by being uniformly spaced on the left side of the convex support surfaces to face the sun and one or more fourth optical sensors formed by being uniformly spaced on the right side of the convex support surfaces, and which senses sunlight so as to horizontally rotate the solar collector panel; a passive element circuit which has one or more first comparison circuits for comparing the difference in the quantity of output light between the first optical sensors and the second optical sensors and one or more second comparison circuits for comparing the difference in the quantity of output light between the third optical sensors and the fourth optical sensors, and which outputs a driving value for adjusting the altitude of and horizontally rotating the solar collector panel in the direction having a larger light value; an altitude adjustment driving unit for receiving a driving power source from the solar cells of the solar collector panel and for adjusting the altitude of the solar collector panel according to the driving value of the passive element circuit; and a horizontal rotation driving unit for performing the horizontal rotation.

Self-powered solar tracker

A video decoding apparatus and method based on a data and function splitting scheme are disclosed. The video decoding apparatus based on a data and function splitting scheme includes a variable length decoding unit performing variable length decoding and parsing on a bit stream to acquire residual data and a decoding parameter, and splitting the residual data and the decoding parameter by row; and N (N is a natural number of 2 or larger) number of clusters splitting dequantization and inverse discrete cosine transform (IDCT), motion vector prediction, intra prediction and motion compensation, video restoration, and deblocking function into M number of functions, acquiring the residual data, the decoding parameter, and macroblock (MB) processing information of an upper cluster by column, and splitting the information acquired by column into M number of functions to process the same.

Video decoding apparatus and method based on a data and function splitting scheme

A circuit board has an insulative layer including a first surface and a second surface opposite to the first surface. A plurality of electrically conductive patterns is formed on the first surface of the insulative layer. Conductive lands are formed in a die mounting region of the first surface of the insulative layer and electrically connected to one of the plurality of conductive patterns on the first surface. An extending pattern extends from the conductive lands to outside of the mounting region. A protective layer covers the first surface of the insulative layer and the electrically conductive patterns. A trench is formed in the protective layer to expose the conductive lands and the extending patterns.

Circuit board and semiconductor device having the same

Growing community of inventors

Seoul, South Korea

Jae Jin Lee