Abstract: A light emitting device includes a light emitting structure having a plurality of light emitting regions including a first semiconductor layer, an active layer, a second semiconductor layer, a first electrode in one of the light emitting regions, a second electrode in another of the light emitting regions, and at least one connection electrode to sequentially connect the light emitting regions in series. The light emitting regions connected in series are divided into 1st to ith light emitting region groups. Areas of light emitting regions that belong to different groups are different. An area of a light emitting region which is more frequently used among the plurality of light emitting regions is larger than an area of a light emitting region which is less frequently used among the plurality of light emitting regions.

Abstract: A light emitting device includes a light emitting structure having a plurality of light emitting regions including a first semiconductor layer, an active layer, a second semiconductor layer, a first electrode in one of the light emitting regions, a second electrode in another of the light emitting regions, and at least one connection electrode to sequentially connect the light emitting regions in series. The light emitting regions connected in series are divided into 1st to ith light emitting region groups. Areas of light emitting regions that belong to different groups are different. An area of a light emitting region which is more frequently used among the plurality of light emitting regions is larger than an area of a light emitting region which is less frequently used among the plurality of light emitting regions.

Abstract: A light emitting device including a light emitting structure comprising a plurality of light emitting regions comprising a first semiconductor layer, an active layer and a second semiconductor layer, a first electrode unit disposed on the first semiconductor layer in one of the light emitting regions, a second electrode unit disposed on the second semiconductor layer in another of the light emitting regions, and at least one connection electrode to sequentially connect the light emitting regions in series, wherein the light emitting regions connected in series are divided into 1st to ith light emitting region groups and areas of light emitting regions that belong to different groups are different (where 1<i?j, each of i and j is a natural number, and j is a last light emitting region group).

Abstract: Disclosed is a light emitting device including a light emitting structure including a plurality of light emitting regions including a first semiconductor layer, an active layer and a second semiconductor layer, and a plurality of boundary regions disposed between the light emitting regions, a first electrode unit disposed on the first semiconductor layer in one of the light emitting regions, a second electrode unit disposed on the second semiconductor layer in another of the light emitting regions, at least one connection electrode to electrically connect the first semiconductor layer of one of adjacent light emitting regions to the second semiconductor layer of the other thereof, and an intermediate pad disposed on the first semiconductor layer or the second semiconductor layer in at least one of the light emitting regions, wherein the light emitting regions are connected in series through the connection electrode.

Abstract: A light emitting device including a light emitting structure comprising a plurality of light emitting regions comprising a first semiconductor layer, an active layer and a second semiconductor layer, a first electrode unit disposed on the first semiconductor layer in one of the light emitting regions, a second electrode unit disposed on the second semiconductor layer in another of the light emitting regions, and at least one connection electrode to sequentially connect the light emitting regions in series, wherein the light emitting regions connected in series are divided into 1st to ith light emitting region groups and areas of light emitting regions that belong to different groups are different (where 1<i?j, each of i and j is a natural number, and j is a last light emitting region group).

Abstract: Disclosed is a light emitting device including: a light emitting structure including a plurality of light emitting regions including a first semiconductor layer, an active layer and a second semiconductor layer; a first electrode unit disposed on the first semiconductor layer in one of the light emitting regions; a second electrode unit disposed on the second semiconductor layer in another of the light emitting regions; an intermediate pad disposed on the second semiconductor layer in at least still another of the light emitting regions; and at least one connection electrode to sequentially connect the light emitting regions in series, wherein the light emitting regions connected in series are divided into 1st to ith light emitting region groups and areas of light emitting regions that belong to different groups are different (where 1<i?j, each of i and j is a natural number, and j is a last light emitting region group).

Abstract: A flexible printed circuit board module includes a flexible printed circuit board having a conductive layer in an upper part of the flexible printed circuit board, an optical fiber disposed under the flexible printed circuit board, light propagating through an interior of the optical fiber and a supporting member supporting an optical fiber and having a first reflecting member reflecting incident light from the flexible printed circuit board so as to connect the light to the optical fiber.

Abstract: A high-speed WPAN (Wireless Personal Area Network) system for extending a service area includes an optical fiber serving as a medium for transmitting data; a plurality of pico-nets each including a plurality of devices and a PNC (Pico-Net Coordinator) device for managing the devices; a plurality of two-way signal converters corresponding to the pico-nets, each of the signal converters adapted for converting an optical signal received from the optical fiber into an electrical signal to transmit the electrical signal to the pico-nets, and for converting an electrical signal received from each of the pico-nets into an optical signal to transmit the optical signal to the optical fiber. A plurality of connectors are attached to the optical fiber and the signal converters for transmitting signals input from the optical fiber and the signal converters bidirectionally.

Abstract: An indoor local area network (LAN) system using an ultra wide-band (UWB) communication system is provided. The indoor LAN system includes at least one remote terminal including a UWB module for converting input digital data to be transmitted into an analog signal of an ultra wide-bandwidth and wirelessly transmitting the converted analog signal via an antenna of the remote terminal. The UWB module receives an analog signal of the ultra wide-bandwidth via the antenna and converts the received analog signal into a digital signal. The indoor LAN system further includes at least one access point for performing USB-based wireless communication with the remote terminal in a corresponding area. The access point is adapted to receive the analog signal of the ultra wide-bandwidth transmitted from the remote terminal and convert the received analog signal into an optical signal.

Abstract: An access point in an optical fiber-based high-speed optical wireless network is disclosed.

Abstract: An optical module and an optical communication system using the optical module are disclosed. The optical module includes an optical active device for receiving or generating light, a housing made of a metal material and having the optical active device mounted therein, an optical filter having a conductive transparent electrode through which light is input to or output from, wherein the transparent electrode is grounded by the housing.

Abstract: An apparatus for transmitting signals between UWB networks is disclosed, which comprises: a signal converter for converting received optical signals from another UWB network into UWB signals, transmitting the converted optical signals within a UWB network, and converting UWB signals generated from within the UWB network into optical signals; and an optical signal transmission means for directing the received optical signals the signal converter and a further UWB network.

Abstract: A wavelength division coupler capable of dividing and coupling at least three wavelengths is provided. The wavelength division coupler includes a first waveguide having a first end and a second end, a second waveguide having a third end and a fourth end, in which a section between the third end and the fourth end is located adjacently to one end of the first waveguide to form a mode coupling section for dividing or coupling an input light, and a Bragg zone having a Bragg grating in the mode coupling section formed in portions of die first waveguide and the second waveguide.

Abstract: A bi-directional optical transceiver includes: an optical fiber for transmitting and receiving first and second optical signals; a transmitter module for generating the first optical signal; a receiver module for detecting the second optical signal; a tap filter for splitting a portion of the first optical signal; a monitor module for monitoring the magnitude of the portion of the first optical signal split by the tap filter; and a wavelength selection filter, which is located between the tap filter and the optical fiber, inputs the first optical signal output from the tap filter into the optical fiber, and inputs the second optical signal output from the optical fiber into an optical detector.

Abstract: A wavelength division coupler capable of dividing and coupling at least three wavelengths is provided. The wavelength division coupler includes a first waveguide having a first end and a second end, a second waveguide having a third end and a fourth end, in which a section between the third end and the fourth end is located adjacently to one end of the first waveguide to form a mode coupling section for dividing or coupling an input light, and a brag zone having a brag grating in the mode coupling section formed in portions of the first waveguide and the second waveguide.

Abstract: A high-speed WPAN (Wireless Personal Area Network) system for extending a service area includes an optical fiber serving as a medium for transmitting data; a plurality of pico-nets each including a plurality of devices and a PNC (Pico-Net Coordinator) device for managing the devices; a plurality of two-way signal converters corresponding to the pico-nets, each of the signal converters adapted for converting an optical signal received from the optical fiber into an electrical signal to transmit the electrical signal to the pico-nets, and for converting an electrical signal received from each of the pico-nets into an optical signal to transmit the optical signal to the optical fiber. A plurality of connectors are attached to the optical fiber and the signal converters for transmitting signals input from the optical fiber and the signal converters bidirectionally.

Abstract: An access point in an optical fiber-based high-speed optical wireless network is disclosed.

Abstract: An apparatus for transmitting signals between UWB networks is disclosed, which comprises: a signal converter for converting received optical signals from another UWB network into UWB signals, transmitting the converted optical signals within a UWB network, and converting UWB signals generated from within the UWB network into optical signals; and an optical signal transmission means for directing the received optical signals the signal converter and a further UWB network.

Abstract: Encoded data are transmitted with ultra-wideband (UWB) signals and a corresponding security key is transmitted through an infrared (IR) channel, to provide a secure method for transmitting a relatively large amount of data. The received security key is used by the receiver to decode the received data.

Abstract: An indoor local area network (LAN) system using an ultra wide-band (UWB) communication system is provided. The indoor LAN system includes at least one remote terminal including a UWB module for converting input digital data to be transmitted into an analog signal of an ultra wide-bandwidth and wirelessly transmitting the converted analog signal via an antenna of the remote terminal. The UWB module receives an analog signal of the ultra wide-bandwidth via the antenna and converts the received analog signal into a digital signal. The indoor LAN system further includes at least one access point for performing USB-based wireless communication with the remote terminal in a corresponding area.