Lumens Co., Ltd.

Tae Kyoung Yoo

Min Pyo Kim

Myeong Kook Gong

Kyoung Min Kim

Yong Wook Cho

Sung Hwan Yoo

Seong Bok Yoon

An improved lighting apparatus is disclosed. The lighting apparatus includes a direct current power supply unit, a light emitting unit operating in response to a direct current voltage applied from the direct current power supply unit, and a voltage control unit located between the direct current power supply unit and the light emitting unit to control the level of a voltage applied from the direct current power supply unit to the light emitting unit. The light emitting unit includes first light emitting groups having a first correlated color temperature and being turned on at a first turn-on voltage (V) or above and second light emitting groups having a second correlated color temperature and being turned on at a second turn-on voltage (V) greater than the first turn-on voltage. The first light emitting groups are connected in parallel with the second light emitting groups. The voltage control unit includes at least one variable resistor to control the level of the voltage applied to the light emitting unit such that the second light emitting groups emit light or are prevented from emitting light, achieving a desired correlated color temperature according to a preset proportion.

Lighting apparatus

A light-emitting-device package according to one aspect of the present invention includes: a metal substrate; a light emitting device disposed on a first surface of the metal substrate and configured to emit at least ultraviolet light; a pair of electrodes disposed to be spaced apart from each other on at least the first surface of the metal substrate, and electrically connected to the light emitting device; and an insulating layer provided between the metal substrate and the pair of electrodes. UV reflectance of the first surface of the metal body is higher than UV reflectance of the pair of electrodes.

Light-emitting-device package and production method therefor

An improved lighting apparatus includes a direct current power supply unit, a light emitting unit, and a voltage control unit located between the direct current power supply unit and the light emitting unit to control a level of a voltage applied from the direct current power supply unit to the light emitting unit. The light emitting unit includes first light emitting groups having a first correlated color temperature and being turned on at a first turn-on voltage or above and second light emitting groups having a second correlated color temperature and being turned on at a second turn-on voltage greater than the first turn-on voltage. The voltage control unit includes at least one variable resistor to control such that the second light emitting groups emit light or are prevented from emitting light, achieving a desired correlated color temperature according to a preset proportion.

Growing community of inventors

Seongnam-si, South Korea

Tae Kyoung Yoo