Seoul Semiconductor Co., Ltd.

Coreeelevator Co., Ltd.

Ssedaa Technology Co., Ltd.

Nam Young Kim

Kyoung Bo Han

Myung Hee Lee

Tae Kwang Kim

Ji Seop So

Hwa Ja Kim

Hyon Jo Ji

Sung Jun Ju

Myoung Hee Lee

An elevator moving along an elevator shaft in a building, comprises a car for transport, a worm driving part moving together with the car, a rotating axis of which is parallel to a moving path of the car, and a worm support part including supporting teeth installed in the elevator shaft along the moving path of the car in accordance with worm teeth of the worm driving part. Using the worm driving part and the worm support part mutually interacting, the elevator can go up and down, and the worm driving part and the worm support part keep low frictional resistance to improve an efficiency of lifting.

Wormgear shaped driving part, elevator using wormgear shaped driving part and elevating system

A side-view type light emitting diode package for emitting light, emitted from a light emitting diode chip, toward a side surface is disclosed. The side-view type light emitting diode package comprises a package body having an opening portion for exposing the light emitting diode chip in a light emitting direction; and a light-transmittable resin covering the light emitting diode chip, wherein at least a portion of an inner wall of the opening portion is formed with a step projection for partitioning the opening portion into upper and lower sections, and the lower section of the opening portion below the step projection is filled with the light-transmittable resin. Accordingly, the light-transmittable resin with the convex lens shape may be easily formed, so that the light emission efficiency thereof can be improved.

Light emitting diode package

Disclosed is a light emitting diode (LED) package employing a lead terminal with a reflecting surface. The package includes first and second lead terminals that are spaced apart from each other. The first lead terminal has a lower portion with an LED chip mounting area, and at least one reflecting surface formed by being bent from the lower portion. Meanwhile, a package body supports the first and second lead terminals and forms a cavity through which the LED chip mounting area and the reflecting surface of the first lead terminal and a part of the second lead terminal are exposed. The first and second lead terminals extend outside of the package body. Accordingly, light emitted from an LED chip can be reflected on the reflecting surface with high reflectivity, so that the optical efficiency of the package can be improved.

Light emitting diode package employing lead terminal with reflecting surface

In a side view type light emitting diode (LED) package, a lead frame portion and lead frame electrical contact portions are exposed outside a package body to serve as an additional heat dissipation path. The side view type LED package includes an LED chip, a package body having a side surface with an opening for receiving the LED chip, and lead frames for applying a current to the LED chip. The lead frames include inner leads electrically connected to the LED chip within the package body; electrical contact lower legs extending from the inner leads to a lower portion of the package body and exposed outside the package body in the vicinity of a lower surface of the package body perpendicular to the side surface; and a heat dissipation means extending, separately from the electrical contact lower legs, from at least one of the inner leads outside the package body.

Side view type LED package

Light emitting diode (LED)

Disclosed is a construction and method for jointing steel members using shear rings, achieving a jointing construction to which a real shearing force can be applied, improving working conditions, the jointing strength and durability, and reducing material. The construction has at least one first steel member and at least one second steel member overlapped together and respectively having at least a bolt hole and at least an annular groove, and at least one shear ring inserted in the annular groove of both the first steel member and the second steel member to prevent slip between the first steel member and the second steel member. The annular groove is formed at each of contact surfaces of the first steel member and the second steel member, and the bolt hole has a first clearance while the annular groove of at least one of the first steel member and the second steel member has a second clearance smaller than the first clearance. The second clearance allows a deformation or a displacement of the first steel member and the second steel member against an assembling force by the bolt and the nut until the bolt comes in contact with a side wall of the bolt hole.

Growing community of inventors

Seoul, South Korea

Nam Young Kim