Abstract:
A content zapping method for accessing multimedia contents rapidly and easily by accessing the multimedia contents on a browser basis, includes receiving a screen change command for at least one broadcast channel or at least one content; and changing a screen to a browser which provides the at least one broadcast channel or the at least one content corresponding to the received screen change command, in an order of a pre-stored list.
Abstract:
Disclosed are a method and an apparatus for transmitting and receiving coherent optical OFDM. The apparatus includes: a transmitted OFDM digital signal processing unit outputting an in-phase (I) component digital signal and a quadrature phase (Q) component digital signal; a digital-analog converter converting the in-phase (I)-component digital signal and the quadrature-phase (Q)-component digital signal into an in-phase (I)-component analog signal and a quadrature-phase (Q)-component analog signal, respectively; an adder adding an additional pilot tone signal to each of the in-phase (I)-component analog signal and the quadrature-phase (Q)-component analog signal outputted from the digital-analog converter; and an optical I/Q modulator up-converting the in-phase (I)-component analog signal added with the additional pilot tone signal and the quadrature-phase (Q)-component analog signal added with the additional pilot tone signal to an optical domain to output a coherent optical OFDM signal including the additional pilot tone signal.
Abstract:
Disclosed is a system of a dynamic range three-dimensional image, including: an optical detector including a gain control terminal capable of controlling an optical amplification gain; a pixel detecting module for detecting a pixel signal for configuring an image by receiving an output of the optical detector; a high dynamic range (HDR) generating module for acquiring a dynamic range image by generating a signal indicating a saturation degree of the pixel signal and combining the pixel signal based on the pixel signal detected by the pixel detecting module; and a gain control signal generating module generating an output signal for supplying required voltage to the gain control terminal of the optical detector based on the magnitude of the signal indicating the saturation degree of the pixel signal.
Abstract:
A method includes: forming an epitaxy wafer by growing a light absorbing layer, a grading layer, an electric field buffer layer, and an amplifying layer on the front surface of a substrate in sequence; forming a diffusion control layer on the amplifying layer; forming a protective layer for protecting the diffusion control layer on the diffusion control layer; forming an etching part by etching from the protective layer to a predetermined depth of the amplifying layer; forming a first patterning part by patterning the protective layer; forming a junction region and a guardring region at the amplifying layer by diffusing a diffusion material to the etching part and the first patterning part; removing the diffusion control layer and the protective layer and forming a first electrode connected to the junction region on the amplifying layer; and forming a second electrode on the rear surface of the substrate.
Abstract:
Provided is a core which reduces optic splice loss between discontinuous optical waveguides. The core includes a first waveguide propagation portion having first light-receiving width, a first lightwave discontinuous portion having second light-receiving width, a first taper structure portion having both ends connected to the first lightwave propagation portion and to the first lightwave discontinuous portion, respectively and decreasing in light-receiving width as it goes from the first lightwave propagation portion to the first lightwave discontinuous portion, a second lightwave propagation portion having third light-receiving width, a second lightwave discontinuous portion having fourth light-receiving width, and a second taper structure portion having both ends connected to the second lightwave propagation portion and to the second lightwave discontinuous portion, respectively and decreasing in light-receiving width as it goes from the second lightwave propagation portion to the second lightwave discontinuous portion.
Abstract:
Provided are an adapter assembly and method for compensating optical fibers for a length difference. The adapter assembly includes a first adapter, a second adapter, and a member. The first adapter is configured to be connected to at least one optical communication unit. The second adapter is configured to be connected to at least another optical communication unit and be coupled to the first adapter. The member is configured to be interposed between the first and second adapters for providing an optical signal transmission path between the optical communication units. Owing to the member, a length difference between optical fibers can be compensated for.
Abstract:
A user terminal apparatus and a user interface providing method are provided. The user terminal apparatus providing a control mode to control an apparatus to be controlled and an application mode to operate applications includes a display unit which displays a control mode providing screen and an application mode providing screen, a user interface unit which receives an input of a user's order to select one of the control mode and the application mode, a communication interface unit which communicates with the apparatus to be controlled, and a controller which controls, if the control mode is selected, to display a control screen corresponding to the state of the apparatus to be controlled based on state information of the apparatus to be controlled which is received through the communication interface unit.
Abstract:
A control device is provided. The control device includes a first communication interface unit which transmits a control command in a first communication mode which uses a bi-directional wireless communication, a second communication interface unit which transmits a control command in a second communication mode which uses a unidirectional wireless communication, a state determination unit which determines a communication mode of the control device, a user interface unit which displays a user interface window which corresponds to a determined communication mode and receives the control command with respect to a broadcast receiver and a control unit which transmits the received control command according to the determined communication mode.
Abstract:
A content zapping method for accessing multimedia contents rapidly and easily by accessing the multimedia contents on a browser basis, includes receiving a screen change command for at least one broadcast channel or at least one content; and changing a screen to a browser which provides the at least one broadcast channel or the at least one content corresponding to the received screen change command, in an order of a pre-stored list.
Abstract:
Provided is a method of forming a compound semiconductor device. In the method, a dopant element layer is formed on an undoped compound semiconductor layer. An annealing process is performed to diffuse dopants in the dopant element layer into the undoped compound semiconductor layer, thereby forming a dopant diffusion region. A rapid cooling process is performed using liquid nitrogen with respect to the substrate having the dopant diffusion region.