Abstract: A photovoltaic device includes a photoactive layer which has at least one embossed pattern on a surface thereof. This embossed pattern varies traveling directions of light in the photoactive layer.

Abstract: An iridium phosphorescent dendrimer represented by Formula 1: wherein A is a carbazole-based dendron. Also disclosed is a method of preparing the iridium phosphorescent dendrimer and an electroluminescent device including the iridium phosphorescent dendrimer.

Abstract: A photorefractive dendron compound, a photorefractive dendrimer compound and applications thereof, and more particularly, a photorefractive dendron compound, including a non-linear chromophore containing a tricyanopyrroline-based electron-withdrawing group and a carbazole derivative having excellent charge transport properties, a method of preparing the photorefractive dendrimer compound, a photorefractive device including the photorefractive dendrimer compound, and a method of manufacturing the photorefractive device. In the photorefractive dendrimer compound, dendron has the non-linear optical chromophore and carbazole introduced thereto to thus impart one molecule with both photoconductivity and non-linear optical properties, thereby solving conventional problems caused by poor compatibility between photoconductive material and chromophores in conventional photorefractive material.

Abstract: An apparatus and a method for accurately controlling the phase of a sampling clock signal in an LCD system, wherein the sampling clock is generated by a phase lock loop and delayed in response to a phase delay quantity generated by a controller. The controller continuously generates a first phase delay quantity until a horizontal line width of a digital image signal is equal to a desired width, stores a first total phase delay quantity corresponding to how many times the first phase delay quantity was generated, continuously generates a second phase delay quantity until the current horizontal line width is greater than the desired width, stores a second total phase delay quantity corresponding to how many times the second phase delay quantity was generated, and controls the phase delay of the sampling clock in response to an optimum phase delay quantity which is an average of the first and second phase delay quantities.

Abstract: A multi-display system includes a plurality of display apparatuses capable of mutual data communication, and at least one of the plurality of display apparatuses receives predetermined control information from a user and transmits the control information to another display apparatus. The display apparatus can be remotely controlled without a central computer.

Abstract: An apparatus and a method for accurately controlling the phase of a sampling clock signal in an LCD system, wherein the sampling clock is generated by a phase lock loop and delayed in response to a phase delay quantity generated by a controller. The controller continuously generates a first phase delay quantity until a horizontal line width of a digital image signal is equal to a desired width, stores a first total phase delay quantity corresponding to how many times the first phase delay quantity was generated, continuously generates a second phase delay quantity until the current horizontal line width is greater than the desired width, stores a second total phase delay quantity corresponding to how many times the second phase delay quantity was generated, and controls the phase delay of the sampling clock in response to an optimum phase delay quantity which is an average of the first and second phase delay quantities.

Abstract: A volume reducing agent for processing expanded polystyrene (EPS), containing 65-97 wt % of a first plasticizer having a solubility parameter less than the solubility parameter of the polystyrene; and 3-35 wt % of a second plasticizer having a solubility parameter higher than the solubility parameter of the polystyrene. The volume reducing agent is in a liquid state, has a Ferdor solubility parameter close to that of the polystyrene to be processed in the mixed state and transfers the resulting materials having reduced volume into gel-type products to be floated and easily separated to yield a high quality output of recycled expanded polystyrene (EPS).

Abstract: A volume reducing agent for processing polystyrene, containing 65-97 wt % of a first plasticizer having a solubility parameter less than the solubility parameter of the polystyrene; and 3-35 wt % of a second plasticizer having a solubility parameter higher than the solubility parameter of the polystyrene. The volume reducing agent is in liquid state, has a Ferdor solubility parameter close to that of polystyrene to be processed in the mixed state and transfers the resulting materials having reduced volume into gel-type products to be floated and easily separated.

Abstract: A volume reducing agent for processing expanded polystyrene (EPS), containing 65-97 wt % of a first plasticizer having a solubility parameter less than the solubility parameter of the polystyrene; and 3-35 wt % of a second plasticizer having a solubility parameter higher than the solubility parameter of the polystyrene. The volume reducing agent is in a liquid state, has a Ferdor solubility parameter close to that of the polystyrene to be processed in the mixed state and transfers the resulting materials having reduced volume into gel-type products to be floated and easily separated to yield a high quality output of recycled expanded polystyrene (FPS).

Abstract: A side-chain type second-order nonlinear optical polymer compound having a repeating unit as represented in general structure (I), --(--MO--).sub.m --(--ITCN--NLO--).sub.n --, wherein the sum of m and n is from 5 to 10000 and m and n satisfy m/(m+n)=from 0.05 to 0.95; ITCN--NLO is ##STR1## X is not present, or represents alkylene having from 1 to 6 carbon atoms or aromatic hydrocarbon having from 6 to 12 carbon atoms; Y is a bonding group selected from the group consisting from ether, ester, amide, alkylamino having from 1 to 5 carbon atoms, carbamate and sulfone; NLO is a general second-order nonlinear optical chemical group in which a conjugated aromatic ring can be unsubstituted or substituted by an electron-donor and/or electron-acceptor; and MO is any polymerizable monomer copolymerizable with ITCN--NLO, and a nonlinear optical material prepared with the same arc disclosed.