Abstract: The present disclosure relates to an organic electroluminescent compound, a plurality of host materials, and an organic electroluminescent device comprising the same. By comprising the compound according to the present disclosure or by comprising a specific combination of compounds according to the present disclosure as a plurality of host materials, it is possible to produce an organic electroluminescent device having improved driving voltage, luminous efficiency, and/or lifetime properties compared to the conventional organic electroluminescent devices.

Abstract: An integrated circuit (IC) device includes: a fin-type active area protruding from a substrate and extending in a first horizontal direction; a first nanosheet disposed above an upper surface of the fin-type active area with a first separation space therebetween; a second nanosheet disposed above the first nanosheet with a second separation space therebetween; a gate line extending on the substrate in a second horizontal direction intersecting the first horizontal direction, at least a portion of the gate line being disposed in the second separation space; and a bottom insulation structure disposed in the first separation space.

Abstract: A method for detecting an initial position of a rotor of a permanent magnet synchronous motor in a no-load environment can comprise the steps of: estimating a temporary initial position ?? by means of aligning a d axis; measuring a first voltage command which is output by performing velocity control within predetermined velocity ranges with respect to the forward direction of a motor on the basis of the temporary initial position ??; measuring a second voltage command which is output by performing velocity control within the predetermined velocity range with respect to the reverse direction of the motor on the basis of the temporary initial position ??; calculating respective variations of the first voltage command and second voltage command, and calculating a compensation angle ??; and calculating an initial position ? of the rotor on the basis of the sum of the temporary initial position ?? and compensation angle ??.

Abstract: Disclosed are a current measurement method for a three-phase pulse width modulation inverter using a real-time switch junction temperature estimation technique, and a three-phase pulse width modulation inverter system. The current measurement method may comprise the steps of: calculating a power loss of a switch of an inverter; estimating the junction temperature (T j) of the switch by using a thermal equivalent circuit; estimating a resistance (R ds on) value between both ends of a drain and a source by using a resistance (R ds on) map based on the junction temperature (T j); and using, as a control signal of the inverter, a current value calculated based on the estimated resistance (R ds on) value.

Abstract: Disclosed are a current measurement method for a three-phase pulse width modulation inverter using a real-time switch junction temperature estimation technique, and a three-phase pulse width modulation inverter system. The current measurement method may comprise the steps of: calculating a power loss of a switch of an inverter; estimating the junction temperature (T j) of the switch by using a thermal equivalent circuit; estimating a resistance (R ds on) value between both ends of a drain and a source by using a resistance (R ds on) map based on the junction temperature (T j); and using, as a control signal of the inverter, a current value calculated based on the estimated resistance (R ds on) value.

Abstract: A method for detecting an initial position of a rotor of a permanent magnet synchronous motor in a no-load environment can comprise the steps of: estimating a temporary initial position ?? by means of aligning a d axis; measuring a first voltage command which is output by performing velocity control within predetermined velocity ranges with respect to the forward direction of a motor on the basis of the temporary initial position ??; measuring a second voltage command which is output by performing velocity control within the predetermined velocity range with respect to the reverse direction of the motor on the basis of the temporary initial position ??; calculating respective variations of the first voltage command and second voltage command, and calculating a compensation angle ??; and calculating an initial position ? of the rotor on the basis of the sum of the temporary initial position ?? and compensation angle ??.

Abstract: An integrated circuit device includes a first transistor having a first channel between a first source/drain, and a second transistor having a second channel between a second source/drain. The first transistor operates based on a first amount of current and the second transistor operates based on a second amount of current different from the first amount of current. The first and second channels have fixed channel widths. The fixed channel widths may be based on fins or nanowires included in the first and second transistors.