Samsung Electronics Co., Ltd.

Hyun-Jun Jang

Hyon-Myong Song

Jin-Hee Cho

Min-Kyung Lee

Ho-Saeng Kim

Sang-Jin Eom

Jin-Kyu Bang

Kyung-Moon Seol

Myeong-Ho Jeon

Moon-Chul Shin

Kang-Hoon Choi

Kyung-Han Kim

A built-in antenna apparatus of a mobile terminal includes a main board having at least one feeding portion for feeding RF power and at least one grounding portion at ground potential. The antenna apparatus includes first and second thin metal plates configured to be stacked on the main board and spaced from one another. The second metal plate is electrically connected to the feeding portion and has a length sufficient to resonate within a communication frequency band of the mobile terminal. The first metal plate is electrically connected to the grounding portion and electromagnetically coupled with the second metal plate to resonate.

Antenna apparatus of mobile terminal

A focus control device for a beam projector allows the focus of a lens assembly to be finely and easily controlled. The focus control device includes: a control member rotatably mounted on the beam projector for controlling the focus of a lens assembly; a rotary eccentric member provided in the control member, the rotary eccentric member having a control axis eccentric to the rotary axis of the control member, and being rotated while depicting an elliptical trace in response to the rotation of the control member; a focus guide member provided in the rotary eccentric member, the focus guide member allowing the lens assembly to be moved rectilinearly in the direction of an optical axis in response to the rotation of the control member; and an actuating member provided in the lens assembly and coupled to the focus guide member, the actuating member moving the lens assembly in the direction of the optical axis in response to the movement of the focus guide member. According to the present invention, with the rotation of the rotary dial, the moving distance of the lens assembly can be easily controlled, and the lens assembly can be moved finely to project a sharp picture image.

Focus control device for beam projector

Growing community of inventors

Gyeonggi-do, South Korea

Hyun-Jun Jang