Bluereo Inc.

Lg Innotek Co., Ltd.

Samsung Display Co., Ltd.

Yonsei University

Lg Energy Solution, Ltd.

Hyundai Electronics Industries Co. Ltd.

Snu Rdb Foundation

Kookmin University

Secutronix Inc.

Lg Electronics Inc.

Lg Chem, Ltd

Hyundai Mobis Co., Ltd.

Daelim Industrial Co., Ltd.

Yong Kim

Yong Hee Lee

Kyung Ho Kim

Sang Hun Kim

Hak Sun Chang

Se Hyun Lee

Dae Hwan Kim

Young Rag Do

Yong Su Choi

Seong Young Lee

Hyung Min Kim

Sung Ho Lee

Na Hyeon Cha

Hyun Jae Kim

Hyung Kyun Yu

Kyoung Ho Kim

Sang Suk Jung

Hyun Hong Kim

Soo Ji Hwang

Byoung Sun Na

Na Yoon Kim

Yong Hyup Kim

Hyung-Kyun Yu

Sang-Hun Kim

Jong Pil Park

Young Jin Seo

Jong Kuk Choi

Tae Hun Jung

Soo-Ji Hwang

Dae Jeong Kim

Sung Tae Ahn

Min Woo Lee

Min-Hyeong Kang

Min Hyeong Kang

Won Pill Hwang

Seong Jin Choi

Seok Lyul Lee

Hyungkyun Yu

Byung Keel Sohn

Gu Min Jeong

Myeung Il Kim

Soo San Kim

Sa Hyang Hong

Yong Soo Cho

Cho Long Kim

Ji-Hoon Lee

Sah-Mun Hong

Sanghun Kim

Seung Tack Yu

Yong-Su Choi

Byung-Keel Sohn

Kwang Soon Jung

Yong Jae Jun

Young Shin Jo

Jae Yeop Jung

Jung Mok Jun

Hyun Sun Mo

Jong Woo Ahn

Dong Sik Park

Seung-Tack Yu

So Jung Kang

Sun Woong Choi

Gwan Hyoung Lee

Dong Myung Kim

Byung Kee Kwak

Dae Yong Ok

Da-Jung Kim

Yong-Jae Jun

Cho-Long Kim

Minhyeong Kang

Tae Hun Lee

Sooji Hwang

Sanggyu Yim

In Hwan Jung

Sung Yeon Jang

Yong Chun

A bridgeless power factor-improving converter according to one embodiment of the present invention comprises: a power input unit for receiving power; a first rectifying unit and a second rectifying unit for rectifying the received power; and a power factor-improving switch unit that is connected to the first rectifying unit and the second rectifying unit and improves a power factor according to an on/off operation. The second rectifying unit includes a second upper switch and a second lower switch, wherein the second upper switch is driven by being connected to a driving power source of the power factor-improving switch unit.

Bridgeless power factor-improving converter

A printed circuit board module comprises: a first substrate; a second substrate disposed on the first substrate and including a first region and a second region; a first element disposed on the front surface of the first region; and a second element disposed on the front surface of the second region, wherein the lower end of the first region and the lower end of the second region are disposed in a stepped manner.

Printed circuit board module and electronic device comprising same

The AC/DC converter according to one embodiment of the present invention comprises: a power unit comprising a plurality of power input lines; a main bridge circuit into which input power is input via the power unit; a relay connected in parallel to both ends of any one of the power input lines; and a control unit for controlling the opening/closing of the relay on the basis of the type of input power.

AC/DC converter

An oral care method using an electric toothbrush includes receiving brushing data from an electric toothbrush, by an application; and analyzing the brushing data by the application to display a brushing score indicating how much the brushing is performed.

Oral care method using electric toothbrush which is capable of being interlinked with application

A photovoltaic power generation system according to an embodiment of the present invention comprises: a first converter for converting and outputting power applied from a photovoltaic power generation panel; a second converter for receiving, via a first input/output terminal, the power output by the first converter, converting same, and outputting same via a second input/output terminal, or receiving power from the second input/output terminal, converting same, and outputting same via the first input/output terminal; a third converter for receiving power from the first converter or the second converter and charging an energy storage device, or transmitting power charged in the energy storage device to the second converter; and an active power filter for reducing ripples in the second converter, wherein power stored in the active power filter is transmitted to the first converter.

Photovoltaic power generation system

Provided is a method for switching an energy storage system (ESS) to an uninterruptible power supply (UPS). The method includes: a normal power supply determination step of determining whether normal power is supplied to the ESS; an operation mode setting step of setting an operation mode of the ESS according to whether the normal power is supplied or not; and an ESS control step of controlling the ESS according to a reference corresponding to the operation mode.

Energy storage system convertible to uninterruptible power supply

Disclosed are an apparatus and a system for managing circadian rhythm. The apparatus includes an illuminance measuring portion which measures a bio illuminance value of external light using a circadian lambda filter which passes the external light along according to a circadian rhythm sensitivity curve and a visual lambda filter which passes the external light along according to a visual sensitivity curve, a controller which outputs a control signal for reinforcing a user's circadian rhythm on the basis of the bio illuminance value, and a circadian rhythm reinforcing portion which emits light of a circadian wavelength band toward the user according to the control signal.

Circadian rhythm management apparatus and system

An embodiment provides a display device including: a first substrate; a gate line disposed on the first substrate and extending in a first direction; a storage electrode line extending in the first direction on the same layer as the gate line and including a protrusion partially protruding in a second direction perpendicular to the first direction; a data line insulated from the gate line and the storage electrode line and extending in the second direction; a drain electrode disposed on the same layer as the data line and including an extension portion overlapping the protrusion; a pixel electrode including a connecting portion electrically connected to the extension portion of the drain electrode; and a first spacer disposed on the pixel electrode and partially overlapping the protrusion of the storage electrode line, wherein the first spacer covers an edge of the connecting portion of the pixel electrode in the first direction.

Display device

A display device includes: a substrate; a gate line disposed on the substrate and configured to transmit a gate signal; a reference voltage line disposed apart from the gate line and configured to transmit a reference voltage; an insulation layer disposed on the gate line and the reference voltage line; a pixel electrode layer including: a first sub-pixel electrode disposed on the insulation layer and located at a first side with reference to the gate line; and a second sub-pixel electrode disposed on the insulation layer and located at a second side opposite to the first side with reference to the gate line; and a conductive shield portion disposed on the gate line, wherein the gate line includes two parallel edges, an edge closer to the reference voltage line among the two parallel edges including a first edge, and wherein the conductive shield portion overlaps the first edge.

A toothbrush with suctioning and cleaning functions according to an embodiment of the present invention includes a toothbrush rod including a head portion and a handle portion, a brush disposed at the head portion, a through-hole portion formed at the head portion to supply cleaning water to an oral cavity or suction in dirty water from the oral cavity, a guide tube disposed within the toothbrush rod and connected to the through-hole portion to deliver the cleaning water to the through-hole portion or deliver the dirty water suctioned in through the through-hole portion to the outside, and an external main body to supply the cleaning water to the guide tube and to receive the dirty water from the guide tube.

Toothbrush and oral cleaner with suctioning and cleaning functions

A display device including a gate line, first and second data lines adjacent to each other in a first direction and crossing the gate line, a first transistor electrically connected to the gate line and the first data line, and a first pixel electrode electrically connected to the first transistor, in which the first pixel electrode includes a first sub-electrode and a second sub-electrode adjacent to each other in the first direction, the first sub-electrode includes a first longitudinal stem extending in a direction substantially parallel to the first data line and overlapping the first data line and a plurality of first branches connected to the first longitudinal stem, and the second sub-electrode includes a second longitudinal stem extending in a direction substantially parallel to the second data line and overlapping the second data line and a plurality of second branches connected to the second longitudinal stem.

Display device including pixel electrode having multiple domains

The present disclosure relates to a hermetic tooth cleaning device, and more particularly, to a hermetic tooth cleaning device including: a main body which includes an outer case; a cleaning body which is coupled to the main body, and has an internal fluid conduit formed therein such that at least one nozzle is formed to be opened at one end of the internal fluid conduit, and an accommodating portion is formed at the other end of the internal fluid conduit; a connecting unit which couples the main body and the cleaning body, and has a connecting flow path formed therein, one side fixedly coupled to the main body, and the other side inserted into the accommodating portion; and a first sealing unit which is provided between the cleaning body and the connecting unit, and has a hollow space formed therein, thereby preventing a loss of positive pressure or negative pressure and a leak of gargling water or a cleaning solution by improving sealing performance of a flow path that connects a drive unit and the nozzle.

Hermetic tooth cleaning device

Toothbrush with suctioning and cleaning functions

The present disclosure relates to an electric toothbrush, and more particularly, to an electric toothbrush including: a main body which includes an outer case; a cleaning body which is coupled to the main body and has a cleaning head formed at one end thereof; a vibration transmission unit which couples the main body and the cleaning body, has a vibration generator mounted thereon to generate vibration, and transmits the vibration to the cleaning body; and a vibration damping unit which is provided between the outer case and the vibration transmission unit, thereby maintaining cleaning performance of the electric toothbrush, reducing magnitude of vibration to be transmitted to a user, and improving convenience for the user.

Electric toothbrush

A tooth cleaning device having an internal fluid conduit formed therein, and the tooth cleaning device includes: a main body which has a tube provided in the main body and selectively connectable with a drive unit; and a cleaning body which is assembled to one side of the main body, and has the internal fluid conduit formed in the cleaning body and connectable with the tube, in which at least one nozzle is formed to be opened at one end of the internal fluid conduit. Further, when the main body and the cleaning body are assembled, one end of the tube is connected to one end of the internal fluid conduit so as to form a single continuous flow path, and through the single continuous flow path, a cleaning solution may be discharged or a fluid is sucked and then discharged to the outside.

Tooth cleaning device having internal fluid conduit formed therein

Growing community of inventors

Seoul, South Korea

Yong Kim