Lg Energy Solution, Ltd.

3d Interactive Co., Ltd.

Dong-Hyuk Kim

Yong-Ju Lee

Je-Young Kim

Sun-Young Shin

Bok-Dong Choi

Su-Min Lee

Il-Geun Oh

Rae-Hwan Jo

Moon-Yong Seo

Kwang-Hyun Kim

Sang-Man Park

Jong-Deok Lee

Keumpil Song

Provided is a negative electrode active material for a lithium secondary battery which includes: a silicon-silicon oxide-magnesium silicate composite comprising a silicon oxide (SiO, 0<x≤2) matrix; and silicon (Si) crystal grains, MgSiOcrystal grains and MgSiOcrystal grains present in the silicon oxide matrix, wherein the MgSiOcrystal grains have a crystal size of 5-30 nm and the MgSiOcrystal grains have a crystal size of 20-100 nm in the silicon-silicon oxide-magnesium silicate composite, and the content ratio of MgSiOcrystal grains to MgSiOcrystal grains is 2:1-1:1 on the weight basis. A method for preparing the negative electrode active material for a lithium secondary battery is also provided.

Negative electrode active material for lithium secondary battery and lithium secondary battery comprising the same

Disclosed is a method comprising the steps of: receiving an input of content motion data included in VR content; transmitting, to a motion device, motion control data corresponding to the input content motion data to control movement of the motion device; receiving, from a predetermined sensing apparatus, motion detection data corresponding to a movement state of the motion device; selecting a motion sickness-causing section by using a difference between the motion control data and the motion detection data; generating final motion control data according to a preset algorithm such that the level of motion sickness in the selected motion sickness-causing section is minimized during a preset content reproduction section, and storing the generated final motion control data; and when 3D VR content is reproduced, transmitting, to the motion device, the final motion control data stored in the previous step so as to control the movement of the motion device.

Motion sickness reduction method and apparatus for VR motion platform

Disclosed is a negative electrode active material which includes: a silicon oxide composite including i) Si, ii) a silicon oxide represented by SiO(0&#x3c;x&#x2264;2), and iii) magnesium silicate containing Si and Mg; and a carbon coating layer positioned on the surface of the silicon oxide composite and including a carbonaceous material, wherein X-ray diffractometry of the negative electrode active material shows peaks of MgSiOand MgSiOat the same time and shows no peak of MgO; the ratio of peak intensity, I (MgSiO)/I (MgSiO), which is intensity I (MgSiO) of peaks that belong to MgSiOto intensity I (MgSiO) of peaks that belong to MgSiOis smaller than 1, the peaks that belong to MgSiOare observed at 2&#x3b8;=32.2&#xb1;0.2&#xb0;, and the peaks that belong to MgSiOare observed at 2&#x3b8;=30.9&#xb1;0.2&#xb0;.

Negative electrode active material, negative electrode including the same and lithium secondary battery including the same

A negative electrode which satisfies a need for high energy density while allowing high-speed charging of a battery. A lithium secondary battery including the negative electrode is also provided. The negative electrode includes: a first negative electrode active material having a first core including a silicon oxide-based composite and a carbon coating layer covering the first core including a silicon oxide-based composite; and a second negative electrode active material having a second core including an artificial graphite and a carbon coating layer covering the second core.

Negative electrode for lithium secondary battery and lithium secondary battery including the same

Provided is a virtual experience device for aviation leisure sports, the device including: a main frame configured to form a vertical pillar and having an accommodation space in a region of an inside of the main frame; a bottom frame connected to the main frame and configured to form a bottom surface of the virtual experience device for aviation leisure sports; an upper frame extending from the main frame in a horizontal direction and having an accommodation space in a region of an inside of the upper frame and at least one through hole formed in a bottom surface of the upper frame; side frames installed at both sides of the upper frame and configured to support a load of the upper frame; and at least one roller provided in the accommodation space of the upper frame and configured to change a progression direction of a traction wire connected to a harness that will be put on by a user for a leisure sports aircraft virtual experience, wherein a motor portion for adjusting a usage length of the traction wire is provided at a top end of the main frame.

Virtual experience device for aviation leisure sports

Growing community of inventors

Daejeon, South Korea

Dong-Hyuk Kim