Lg Electronics Inc.

Yonsei University

Sangmin Kim

Sungmo Im

Seunggyu Kang

Honghae Do

Youngwook Kang

Sanghoon Yoon

Huisik Kim

Jaeuk Ryu

Heejin Kim

Younghwan Kim

Hyuncheol Cho

Hodong Hwang

Kyeon Hur

Dabin Lee

Jinkook Kim

Weonyoung Sho

Kiyoon Nam

Ryangkyu Kim

Haknyun Choi

Yongchai Choi

Jongseo Na

A reciprocating compressor may include a ball bearing positioned between a thrust surface of a cylinder block and a thrust surface of a crankshaft. The ball bearing may include a ball cage in a ring shape, a plurality of balls rotatably coupled to the ball cage, at least one washer positioned at least one of between the thrust surface of the cylinder block and the plurality of balls and between the thrust surface of the crankshaft and the plurality of balls, and a rotation preventing portion that limits rotation of the washer with respect to the corresponding thrust surface. According to a reciprocating compressor having the rotation preventing portion, as relative rotation of the washer with respect to the thrust surface of the cylinder block and/or the thrust surface of the crankshaft is restrained even if a rotational force higher than a viscous force acting on the washer is applied because a viscosity of oil is lowered, it is possible to eliminate the problem of deterioration of reliability and performance of the compressor.

Reciprocating compressor

A display device is provided. The display device of the present disclosure includes: a head having a display panel; and a stand disposed adjacent to a first side of the head and supporting the head, wherein the stand includes: a body coupled to the head, the body having a front leg that protrudes forward from the body; a rear leg protruding rearward from the body; and an elastic member disposed between the rear leg and the front leg, coupled to the rear leg, and being stretchable in a front-rear direction.

Display device comprising a stand having an elastic member disposed between a rear leg and a front leg

A display device is disclosed. The display device includes a display panel; a material complexed plate located at a rear of the display panel; a side frame which is located between the display panel and the material complexed plate, is fixed to the material complexed plate, and to which the display panel is coupled, wherein the material complexed plate includes a front skin forming a front surface; a rear skin which forms a rear surface and faces the front skin; and a core which is located between the front skin and the rear skin, and includes fibers.

Display device

A display device is disclosed. The display device includes a display panel, a main frame located at the rear of the display panel, and an inner plate located between the display panel and the main frame, the display panel being coupled to the inner plate, wherein the inner plate includes a coupling area depressed from the inner plate to the main frame by pressing, and the inner plate and the main frame are coupled to each other at the coupling area by welding.

The present disclosure includes a display module, a first frame that is disposed to be long along an upper side of the display module and is convexly bent toward a front side of the display module, a second frame that is spaced apart from the first frame in the vertical direction, is disposed to be long along a lower side of the display module, and is convexly bent in the same direction as the first frame, a third frame disposed between one side of the first frame and one side of the second frame, a fourth frame spaced apart from the third frame in the left-right direction and disposed between the other side of the first frame and the other side of the second frame, an upper sliding member mounted movably in the first frame and fixed to the upper side of the display module, and a lower sliding member mounted movably in the second frame and fixed to the lower side of the display module.

Disclosed is a modular multilevel converter sub-module, including: a normal circuit which includes a first switching element and a second switching element connected in series and a first diode and a second diode respectively connected to be parallel to the first switching element and the second switching element to offset a counter electromotive force generated in the first switching element and the second switching element, a fault DC current blocking circuit which includes a capacitor connected to the normal circuit in parallel and applies a capacitor voltage to a DC fault path as a reverse voltage with respect to a fault voltage, and a bypass circuit which includes a third switch element, is connected to the fault DC current blocking circuit in parallel, and determines an output voltage and a direction of an arm current to provide a DC fault current bypass path when a DC fault current occurs.

Modular multilevel converter sub-module having DC fault current blocking function and method of controlling the same

Growing community of inventors

Seoul, South Korea

Sangmin Kim