Abstract: A method for preparing a quantum dot includes supplying a first mixture including a first precursor material including a silver precursor, an indium precursor, a first gallium precursor, and a first solvent including oleylamine, trioctylphosphine oxide, and trioctylamine, adding a first sulfur precursor to the first mixture to form cores including silver, indium, gallium, and sulfur, reacting the cores with a second precursor material including a second sulfur precursor and a second gallium precursor to form a first shell around each of the cores, wherein the cores including the first shells comprise first particles, and adding a first element precursor and a second element precursor to a second mixture, the second mixture including the first particles and a second solvent, to form a second shell around each of the first shells.

Abstract: Embodiments provide a quantum dot, a method of preparing the quantum dot, and a display device including the quantum dot. The quantum dot includes a core including zinc (Zn), tin (Sn), and phosphorous (P), and a shell surrounding the core, wherein a molar ratio of the number of moles of zinc to a number of moles of tin is in a range of about 0.1 to about 0.2.

Abstract: Embodiments provide a quantum dot that includes a core including zinc (Zn), tin (Sn) and phosphorus (P), and a shell surrounding the core, wherein a molar ratio of a number of moles of zinc to a number of moles of tin is in a range of about 0.1 to about 2. The quantum dots have high luminous efficiency and color purity.

Abstract: A quantum dot includes a core including InP, a first shell around (e.g., surrounding) the core and including ZnTeSe, a second shell around (e.g., surrounding) the first shell and including ZnSe, and a third shell around (e.g., surrounding) the second shell and including ZnS, wherein the ratio of the number of moles of the Te in the first shell to the number of moles of the P in the core is about 0.02 to about 0.90.

Abstract: A microgrid control system includes a power transmission system configured to supply power to a microgrid, the microgrid configured to receive power from the power transmission system and to supply power to at least one or more distributed generators or into at least one or more loads, a DC converter configured to convert power that is supplied to the microgrid, and a converter control unit configured to measure a first power frequency variation of the microgrid and a second power frequency variation of the power transmission system and to control active power that is transmitted to the microgrid by the DC converter.

Abstract: There is disclosed a digital signage including a display panel, a housing having the display panel arranged in one surface, the housing comprising a closed inner space, a cooling unit provided in a predetermined portion of the housing, the cooling unit comprising a hole configured to suck and exhaust external air, a heat pipe comprising one end positioned in the inner space of the housing to be coupled to a back surface of the display and the other end positioned in the cooling unit, with a liquid flowing therein to move heat, and a driving circuit board coupled to a back surface of the heat pipe to control driving of the display panel, such that the digital signage having a slim design can exhaust the heat generated from a display panel and a driving circuit board effectively.

Abstract: There is disclosed a digital signage including a display panel, a housing having the display panel arranged in one surface, the housing comprising a closed inner space, a cooling unit provided in a predetermined portion of the housing, the cooling unit comprising a hole configured to suck and exhaust external air, a heat pipe comprising one end positioned in the inner space of the housing to be coupled to a back surface of the display and the other end positioned in the cooling unit, with a liquid flowing therein to move heat, and a driving circuit board coupled to a back surface of the heat pipe to control driving of the display panel, such that the digital signage having a slim design can exhaust the heat generated from a display panel and a driving circuit board effectively.

Abstract: There is disclosed a digital signage including a display panel, a housing having the display panel arranged in one surface, the housing comprising a closed inner space, a cooling unit provided in a predetermined portion of the housing, the cooling unit comprising a hole configured to suck and exhaust external air, a heat pipe comprising one end positioned in the inner space of the housing to be coupled to a back surface of the display and the other end positioned in the cooling unit, with a liquid flowing therein to move heat, and a driving circuit board coupled to a back surface of the heat pipe to control driving of the display panel, such that the digital signage having a slim design can exhaust the heat generated from a display panel and a driving circuit board effectively.

Abstract: A microgrid control system includes a power transmission system configured to supply power to a microgrid, the microgrid configured to receive power from the power transmission system and to supply power to at least one or more distributed generators or into at least one or more loads, a DC converter configured to convert power that is supplied to the microgrid, and a converter control unit configured to measure a first power frequency variation of the microgrid and a second power frequency variation of the power transmission system and to control active power that is transmitted to the microgrid by the DC converter.

Abstract: There are disclosed a digital signage including a display panel, a first support panel coupled to a rear surface of the display panel, the first support panel comprising a plurality of first grooves formed in one direction, a second support panel coupled to a rear surface of the first support panel, the second support panel comprising a plurality of second grooves formed in an orthogonal direction with respect to the first grooves, a driving circuit board provided in a rear surface of the second support panel to control driving of the display panel, and a case comprising the display panel arranged in one surface thereof and an inner space where the first support panel, the second support panel and the driving circuit board are mounted, wherein both ends of the first grooves are open toward the inner space of the case to induce air flow in the case, and both ends of the second grooves are in communication with the outside via a hole formed in the case to flow external air there through, such that the support s

Abstract: There are disclosed a digital signage including a display panel, a first support panel coupled to a rear surface of the display panel, the first support panel comprising a plurality of first grooves formed in one direction, a second support panel coupled to a rear surface of the first support panel, the second support panel comprising a plurality of second grooves formed in an orthogonal direction with respect to the first grooves, a driving circuit board provided in a rear surface of the second support panel to control driving of the display panel, and a case comprising the display panel arranged in one surface thereof and an inner space where the first support panel, the second support panel and the driving circuit board are mounted, wherein both ends of the first grooves are open toward the inner space of the case to induce air flow in the case, and both ends of the second grooves are in communication with the outside via a hole formed in the case to flow external air there through, such that the support s

Abstract: There is disclosed a digital signage including a display panel, a housing having the display panel arranged in one surface, the housing comprising a closed inner space, a cooling unit provided in a predetermined portion of the housing, the cooling unit comprising a hole configured to suck and exhaust external air, a heat pipe comprising one end positioned in the inner space of the housing to be coupled to a back surface of the display and the other end positioned in the cooling unit, with a liquid flowing therein to move heat, and a driving circuit board coupled to a back surface of the heat pipe to control driving of the display panel, such that the digital signage having a slim design can exhaust the heat generated from a display panel and a driving circuit board effectively.