Samsung Electronics Co., Ltd.

Samsung Sdi Co., Inc.

Woo-Hyuk Choi

Jae-Hyun Park

Jin-Hee Kim

Bong-Hee Kim

Chang-Hoon Lee

Tae-young Kang

Gwan-Sun Lee

Nam-geol Lee

Chul-Hwan Lee

Sung-Min Kang

Byeong-cheol Hwang

Dong-Sung Kim

Kwan-Sic Chun

Se-Chang Kwon

Dong-Ryul Lee

Shin-Hee Do

Hye-Kyoung Hwang

Noh-Kyung Hong

Nam-Geol Lee

Seong-Nyun Kim

Pyeong-Uk Park

Hak-Sun Jang

A cylindrical lithium secondary battery includes: an electrode assembly with a center pin at a center of the electrode assembly; a can accommodating the electrode assembly; and a cap assembly coupled to a top of the can, wherein at least one end of the center pin is contoured to deform during collision between the center pin and a bottom surface of the can or the cap assembly and to absorb the impact so as to prevent the center pin from escaping the cylindrical lithium secondary battery.

Cylindrical lithium secondary battery comprising a contoured center pin

Disclosed is a method for transmitting image data in real-time between mobile communication terminals in a mobile communication system, the mobile communication system including a host mobile communication terminal, at least one client mobile communication terminal, an SMS server, and a PDSN assigning IP addresses. The method includes when an IP address is received from the PDSN, transmitting by the host mobile communication terminal an invite message to the client mobile communication terminal via the SMS server; receiving by the client mobile communication terminal an IP address from the PDSN, and transmitting a register message to the host mobile communication terminal via the PDSN; updating by the host mobile communication terminal a buddy list, and transmitting the updated buddy list to the client mobile communication terminal via the PDSN; and exchanging by the host and the client mobile communication terminals the image data in real-time based on the updated buddy list.

Method for transmitting image data in real-time

In a mobile communication system, a host mobile communication terminal transmits an invite message to a client mobile communication terminal by means of a short message, and the host mobile communication terminal and the client mobile communication terminal perform a mutual messenger service through a PDSN, such that a system for the messenger service may be easily constructed and a message may be quickly transmitted. Further, a host mobile communication terminal and client mobile communication terminals each perform a point-to-point protocol connection with a PDSN, and perform a mutual messenger service, such that they can exchange data having various formats, such as text messages, audio information, and data/image information stored in the terminal with each other.

Mobile communication system and method for providing real time messenger service among mobile communication terminals

Growing community of inventors

Yongin-si, South Korea

Woo-Hyuk Choi