Lg Chem, Ltd

Lg Electronics Inc.

Yonsei University

Byung Hyun Lee

Heon Kim

Hye Won Jeong

Sung Joon Oh

Min Young Lim

Keon Woo Lee

Sung Ho Chun

Kyungjun Kim

Kyung Jun Kim

Jung Ho Jo

Sang Joon Kim

Dong Hyun Oh

Jang Won Lee

Sung-Ho Chun

Kyung-Jun Kim

Jungho Jo

Hye Ran Seong

Hyun Suk Lee

Sang Kook Kim

Seok Jae Moon

The present disclosure provides an apparatus and a method for random access in a wireless communication system having a base station and wireless terminals, where the wireless terminal can select a detection sub-segment from a preamble detection segment that is divided into a multiple number of detection sub-segments, transmit a random access preamble with the timing adjusted such that the random access preamble is received at the base station in the selected detection sub-segment, and when a random access response message is received from the base station, transmit a terminal identification message to the base station and receive a contention resolution message from the base station.

Apparatus and method for random access in wireless communication system

Provided are a photoreactive polymer that includes a multi-cyclicmulticyclic compound at as its main chain and a method of preparing the same. The photoreactive polymer exhibits excellent thermal stability since it includes a multi-cyclicmulticyclic compound having a high glass transition temperature at as its main chain. In addition, the photoreactive polymer has a relatively large vacancy so that a photoreactive group can move relatively freely in the main chain therein. As a result, a slow photoreaction rate, which is a disadvantage of a conventional polymer material used to form an alignment layer for a liquid crystal display device, can be overcome.

Photoreactive polymer and process of making the same

A mobile terminal having a display unit provided with an LED backlight and controlling method thereof are disclosed. The present invention includes a housing, a display unit including a liquid crystal display provided to one side of the housing and a backlight unit including a plurality of light emitting diodes for a backlight provided to a backside of the liquid crystal display and a control unit controlling the backlight unit to selectively adjust brightness of the light emitting diodes in part. Accordingly, a mobile terminal according to at least one of embodiments of the present invention controls light emission of an LED backlight locally, thereby providing more various display visual effects. And, a mobile terminal according to one embodiment of the present invention is able to use at least one portion of the light emitted from an LED BLU of a display unit as an illumination of a main body without using a separate light source for external illumination. Moreover, the illumination of the main body is able to play a role as a transmitter in a visible light communication.

Mobile terminal having an LED backlight unit

Disclosed is a copolymer for liquid crystal alignment having a photoreactive group, a mesogen group, a thermosetting group, and a crosslinking group, a liquid crystal aligning layer including the copolymer for liquid crystal alignment, and a liquid crystal display including the liquid crystal aligning layer. Since the liquid crystal aligning layer has excellent thermal stability and no residual image, the liquid crystal aligning layer is usefully applied to the liquid crystal display.

Copolymer for liquid crystal alignment, liquid crystal aligning layer including copolymer for liquid crystal alignment, and liquid crystal display including liquid crystal aligning layer

Disclosed is a multi-functional monomer including a heat-curable functional group as well as a typical photoreactive group. In the multi-functional monomer, the photoreactive group is not chained to a main chain of a polymer. Thus, since it is possible to perform desirable alignment treatment even though polarized UV is radiated for a short time, the production time and the production cost are reduced and alignment regulating force of liquid crystals is increased, thereby increasing a dichroic ratio.

Multi-functional monomer having a photoreactive group, alignment film for LCD using the monomer, and LCD comprising the alignment film

The present invention provides a composition for forming a liquid crystal alignment film, which comprises a photoreactive polymer including a multicyclic compound having a photoreactive group on a main chain thereof. The present invention also provides a liquid crystal alignment film produced using the composition, and a liquid crystal display including the liquid crystal alignment film. The photoreactive polymer including the multicyclic compound on the main chain thereof has a high glass transition temperature, thus thermal stability is excellent. Since lattice vacancy is relatively large, the photoreactive group is capable of moving relatively freely in the main chain of the polymer, thus it is possible to improve a slow photoreaction rate, which is considered a disadvantage of a conventional polymer material.

Alignment film for LCD using photoreactive polymer and LCD comprising the same

Provided are a photoreactive compound represented by formula (1), a liquid crystal alignment layer using the compound, a method of manufacturing the alignment layer, and a liquid crystal display device including the alignment layer: 

Photoreactive compound, liquid crystal alignment layer using the compound, method of manufacturing the alignment layer, and liquid crystal display device containing the alignment layer

Growing community of inventors

Daejeon Metropolitan, South Korea

Byung Hyun Lee