Abstract: A refrigerator includes a storage chamber having an opening; a drawer type door to open or close the opening; a display positioned at the drawer type door; a first connector provided at a sidewall of the storage chamber; a second connector provided at the drawer type door and being electrically connected to the display; a first frame coupled to an inner wall of the storage chamber, the first frame to cover the first connector; a second frame coupled to the drawer type door, the second frame to support a storage box; and a wire electrically connected between the first connector and the second connector. The first frame has a first accommodating part to accommodate one portion of the wire and the second frame has a second accommodating part to accommodate another portion of the wire.

Abstract: A laser marking system for coil springs includes: a support unit; a first fixing jig coupled to the support unit and contacting one surface of a coil spring; a second fixing jig located at a side facing the first fixing jig and contacting an surface opposite to the surface of the coil spring; a moving unit frame connected to the support unit and to which the second fixing jig is fixed; a moving unit servo motor connected to the moving ball screw; a marking unit frame connected to the moving unit frame and configured to move forwards and rearwards towards the coil spring to perform a marking operation on the coil spring; a marking unit ball screw connected to the marking unit frame; a marking unit servo motor connected to the marking unit ball screw; and a laser marker fixing to the marking unit frame.

Abstract: A buck-boost converter includes: a converting circuit; a ripple injector; a hysteresis comparator; and a switching controller. The converting circuit is configured to generate an output voltage by adjusting an input voltage in a buck mode, a boost mode, and a buck-boost mode. The ripple injector is configured to generate a ripple based on switching signals corresponding to switching operations of the converting circuit. The hysteresis comparator outputs at least one switching control signal by comparing an output control voltage with a feedback voltage generated by adding the ripple to a divided voltage generated by performing a voltage division on the output voltage. The switching controller is configured to change a current flow path of the converting circuit based on the at least one switching control signal.

Abstract: A voltage regulator includes a high duty cycle detector, a feedback controller, a hysteretic comparator, and first and second drivers. The high duty cycle detector generates a high duty cycle signal based on a power supply voltage and a reference voltage. The feedback controller generates first and second feedback voltages based on the reference voltage, the high duty cycle signal and an output voltage of the voltage regulator. The hysteretic comparator compares the reference voltage and the first feedback voltage to generate a control signal. When the first feedback voltage is activated, the first driver drives an output node that provides the output voltage based on the control signal and the high duty cycle signal. When the second feedback voltage is activated, the second driver generates a third voltage proportional to the reference voltage based on the power supply voltage and the second feedback voltage, and drives the output node with the third voltage.

Abstract: A voltage regulator includes a high duty cycle detector, a feedback controller, a hysteretic comparator, and first and second drivers. The high duty cycle detector generates a high duty cycle signal based on a power supply voltage and a reference voltage. The feedback controller generates first and second feedback voltages based on the reference voltage, the high duty cycle signal and an output voltage of the voltage regulator. The hysteretic comparator compares the reference voltage and the first feedback voltage to generate a control signal. When the first feedback voltage is activated, the first driver drives an output node that provides the output voltage based on the control signal and the high duty cycle signal. When the second feedback voltage is activated, the second driver generates a third voltage proportional to the reference voltage based on the power supply voltage and the second feedback voltage, and drives the output node with the third voltage.

Abstract: A marking system for springs comprises: an arranging apparatus for arranging a spring; and a marking apparatus for applying an identification mark on the spring. The marking apparatus comprises: a frame having a space for marking therein; a pad unit for applying a mark on the spring located in the frame; and an ink unit for supplying ink to the pad unit.

Abstract: A buck-boost converter includes: a converting circuit; a ripple injector; a hysteresis comparator; and a switching controller. The converting circuit is configured to generate an output voltage by adjusting an input voltage in a buck mode, a boost mode, and a buck-boost mode. The ripple injector is configured to generate a ripple based on switching signals corresponding to switching operations of the converting circuit. The hysteresis comparator outputs at least one switching control signal by comparing an output control voltage with a feedback voltage generated by adding the ripple to a divided voltage generated by performing a voltage division on the output voltage. The switching controller is configured to change a current flow path of the converting circuit based on the at least one switching control signal.

Abstract: A marking system for springs comprises: an arranging apparatus for arranging a spring; and a marking apparatus for applying an identification mark on the spring. The marking apparatus comprises: a frame having a space for marking therein; a pad unit for applying a mark on the spring located in the frame; and an ink unit for supplying ink to the pad unit.

Abstract: A laser marking system for springs includes: a support unit; a first fixing jig coupled to the support unit and contacting one surface of a spring; a second fixing jig located at a side facing the first fixing jig and contacting an surface opposite to the surface of the spring; a moving unit frame connected to the support unit and to which the second fixing jig is fixed; a moving unit servo motor connected to the moving ball screw; a marking unit frame connected to the moving unit frame and configured to move forwards and rearwards towards the spring to perform a marking operation on the spring; a marking unit ball screw connected to the marking unit frame; a marking unit servo motor connected to the marking unit ball screw; and a laser marker fixing to the marking unit frame.