Seoul Viosys Co., Ltd.

Seoul Semiconductor Co., Ltd.

Seoul Opto Device Co., Ltd.

In Kyu Park

Jun Yong Park

Daewoong Suh

Hee Cheul Jung

Do Hyung Kim

Byung Hoon Choi

Yeo Jin Yoon

Dae Won Kim

Dae Sung Kal

Jung Hwa Jung

Seung Wook Lee

Byoung Hoon Choi

Jae Hyun Park

Byoung Sung Kim

Jun Myeong Song

A light emitting diode package includes a housing including a body part, a first lead, a second lead, a light emitting diode chip, and a Zener diode. The body part has a cavity that is open at the top and has inclined side surfaces. The first lead and the second lead are supported by the housing and are disposed apart from each other so as to be electrically insulated. The light emitting diode chip is electrically connected to the first lead and the second lead and mounted within the cavity of the body part. The Zener diode is mounted on one side of the light emitting diode chip and inside the cavity of the body part.

Light emitting diode package

A light-emitting device is provided. The light-emitting device comprises: a first body unit including a base part and at least three conductive patterns positioned on the base part while including a plurality of element loading areas; and a plurality of light-emitting elements positioned on the plurality of element loading areas of the first body unit, wherein at least one conductive pattern among the conductive patterns is electrically connected to at least two light-emitting elements, the at least two light-emitting elements are connected to each other in series, at least two conductive patterns among the conductive patterns include pad electrode areas, an area of the plurality of conductive patterns is 80% or more of an upper surface area of the base part, and a separation distance among the plurality of conductive patterns is 200 &#x3bc;m to 2,400 &#x3bc;m.

Ultraviolet ray emitting device having maximized electrode area for improved heat dissipation

A light-emitting diode package comprising: a substrate having one or more first pads, one or more second pads, a first terminal, and a second terminal, which are all formed on the upper surface; a plurality of light-emitting diode chips loaded on the one or more first pads and electrically connected to the first pad and the second pad; and a reflector coupled to an upper part of the substrate and having an opening part through which the plurality of light-emitting diode chips is exposed, wherein the first pad is formed as one body with the substrate, and the first terminal or the second terminal are connected to an external power source and formed to have a predetermined height at the upper surface of the substrate.

Light-emitting diode package

A light-emitting diode package includes a frame portion with a chip-mounting region defined in an upper portion thereof, and first and second frames spaced apart from each other. A light-emitting diode is mounted on at least a portion of the chip-mounting region with a bonding layer interposed therebetween. The frame portion includes a depressed portion formed on an upper surface thereof, and the depressed portion includes the chip-mounting region defined on a bottom thereof. The depressed portion also includes a step portion disposed at an outer upper end thereof.

Light-emitting device and method of manufacturing the same

Disclosed are a light-emitting device and a manufacturing method thereof. A light-emitting device according to a preferred embodiment of the disclosure comprises: a frame portion having a bottom and a sidewall; a light-emitting portion which is disposed on the frame portion and emits light; and a window portion disposed over the frame portion so as to cover the light-emitting portion.

Disclosed are a light-emitting device and a manufacturing method thereof. A light-emitting device according to an exemplary embodiment of the present invention includes a base, a lighting element disposed on the base, the lighting element including an epitaxial layer and a substrate disposed on the epitaxial layer, a contact member disposed between the lighting element and the base, the contact member electrically connecting the lighting element and the base, and a lens disposed on the substrate.

The disclosure relates to an AC LED dimmer and dimming method thereof. The AC LED dimmer includes a rectifier receiving AC voltage from an AC voltage source and full-wave rectifying the AC voltage; a direct current (DC)/DC converter receiving the full-wave rectified voltage from the rectifier, generating a full-wave rectified stepped-up voltage, and generating a pulse enable signal; a pulse width modulation controller receiving the full-wave rectified stepped-up voltage and generating a pulse width modulation signal to dim an AC LED in response to the pulse enable signal; a switch driving the AC LED under control of the pulse width modulation signal, and an electromagnetic interference (EMI) filter to be connected between the AC voltage source and the switch to eliminate electromagnetic interference from the AC voltage source. Accordingly, the dimmer can perform an efficient and linear dimming function and suppress harmonics.

AC LED dimmer and dimming method thereby

The disclosed light emitting device comprises at least one first light emitting element including at least one light emitting chip for emitting light having a wavelength of 400 to 500 nm and a phosphor; and at least one second light emitting element disposed adjacent to the first light emitting element to emit light having a wavelength of 560 to 880 nm.

Light emitting device

An AC light emitting device, a driving device thereof and a driving method are disclosed. The driving device includes a sub-driving part turned on corresponding to each of positive and negative voltage regions of an AC voltage source to provide current paths for operating at least two LEDs, and a free-charge part charging with a voltage to be supplied to one of the at least two LEDs which is not operated while the other LED is operated by the sub-driving part. The AC light emitting device, the driving device thereof and the driving method thereby can solve problems, such as a decrease in power factor, severe total harmonic distortion, excessive flickering, and the like, due to operating characteristics of the AC light emitting device by application of an AC voltage source thereto.

AC light emitting device, driving device thereof, and driving method thereby

The present invention relates to a white light emitting diode (LED) package that includes a blue LED chip to emit blue light; a yellow phosphor excited by the blue light and emit yellow light, the yellow light to produce a primary white light in combination with the blue light; a red LED chip to emit red light, the red light to adjust the primary white light into secondary white light of an incandescent color; and a package member comprising at least a partial transmissive part covering the blue LED chip, the red LED chip, and the yellow phosphor. The primary white light falls in a region of (0.413, 0.502), (0.335, 0.376), (0.37, 0.371), and (0.439, 0.48) based on a CIE color coordinate standard.

Growing community of inventors

Ansan-si, South Korea

In Kyu Park