Lg Electronics Inc.

Ntt Docomo, Inc.

Kwanwoo Park

Jinju Kim

Sangwoo Kim

Sungwhan Lee

Seungjin Ahn

Kazuoki Ichikawa

Joondong Lee

Kazumasa Nitta

Jonghyun Jin

Heechul Yoo

Atsuto Miyata

Wooyol Kim

Kisuk Woo

Ejae Kim

The present disclosure can be applied to display device-related technical fields and relates to a rotatable display device using, for example, light-emitting diodes (LEDs), which are semiconductor light-emitting diodes. According to the present disclosure, the rotatable display device using light-emitting diodes may comprise: a fixing unit comprising a motor; a rotation unit which is provided on the fixing unit and has a first side coupled to the motor and a second side rotatably coupled to a rotation coupling part, and rotates, the second side being a side opposite to the first side; and a light source module provided in the rotation unit and comprising at least one panel provided along a virtual cylindrical outer circumferential surface thereof and a light-emitting diode array in which individual pixels are provided on each panel in the longitudinal direction.

Rotatable display device using semiconductor light-emitting diodes

A method for performing roaming in a dual mode terminal, which includes a first wireless communication module corresponding to a first communication network and a second wireless communication module corresponding to a second communication network, is disclosed. The method comprises acquiring a public land mobile network (PLMN) identifier by camping on the first communication network; determining whether connection to the first communication network is roaming by comparing roaming decision information included in the PLMN identifier with roaming decision information stored in the dual mode terminal; turning off the second wireless communication module if it is determined that connection to the first communication network is roaming; and transmitting and receiving a signal to and from the first communication network.

Method for restricting communicating service in roaming in multi mode terminal and apparatus therefor

Growing community of inventors

Seoul, South Korea

Kwanwoo Park