Abstract: Disclosed herein is a AC direct LED driving apparatus. The light emitting diode (LED) driving apparatus includes: a rectifier configured to receive and rectify an alternating current (AC) voltage; an LED configured to emit light based on a rectified voltage received from the rectifier; a capacitor connected to a first terminal of the LED, and configured to drive the LED while alternating between charging and discharging sections according to a preset cycle; a first current driver connected to a second terminal of the LED and configured to control a path of current flowing in the LED and the capacitor based on different input voltage levels; a second current driver configured to control charging and discharging of the capacitor; and a first diode connected onto a current path of the capacitor and the second current driver, and configured to form a discharging path for driving the LED based on a charged voltage of the capacitor.

Abstract: Disclosed herein is a AC direct LED driving apparatus. The light emitting diode (LED) driving apparatus includes: a rectifier configured to receive and rectify an alternating current (AC) voltage; an LED configured to emit light based on a rectified voltage received from the rectifier; a capacitor connected to a first terminal of the LED, and configured to drive the LED while alternating between charging and discharging sections according to a preset cycle; a first current driver connected to a second terminal of the LED and configured to control a path of current flowing in the LED and the capacitor based on different input voltage levels; a second current driver configured to control charging and discharging of the capacitor; and a first diode connected onto a current path of the capacitor and the second current driver, and configured to form a discharging path for driving the LED based on a charged voltage of the capacitor.

Abstract: A wireless power transmission apparatus for high efficiency energy charging, includes a resonator configured to transmit power, and a power supply unit configured to supply power to the resonator. The apparatus further includes a first switching unit configured to connect the resonator to the power supply unit, and disconnect the resonator from the power supply unit, and a controller configured to control the first switching unit based on an amount of current flowing into the resonator.

Abstract: A curved-type optical lens assembly and an electronic device are provided. The optical lens assembly focuses an image of an object on the image sensor. The optical lens assembly includes a reflector configured to reflect incident light, a lens array including a plurality of lenses arranged between the reflector and the image sensor, a first light blocker arranged at an object side of the reflector to block the light, and a second light blocker arranged at an image side of the reflector to block the light. The optical lens assembly further includes a first optical axis of the light proceeding towards the reflector and a second optical axis of the light reflected by the reflector.

Abstract: An electronic device according to various embodiments includes a display panel and an image sensor disposed below at least a partial area of the display panel. The image sensor includes a lens unit including a first lens for modifying a path of a portion of reflected light and a second lens for modifying a path of another portion of the reflected light, an optical sensor including a first light-receiving sensor and a second light-receiving sensor, and at least one light-shielding member disposed between the first light-receiving sensor and the second light-receiving sensor.

Abstract: A power switch capable of preventing a reverse connection is provided. The power switch includes a switch that is configured to supply power of a battery to a load or block the power of the battery and a protector that is connected to an output terminal of the switch and blocks the power applied from the battery when the battery is reversely connected and a driver is configured to operate a driving of the switch and the protector.

Abstract: Disclosed is an apparatus for synchronous driving of multi-channel light emitting diodes capable of driving all light emitting diodes at the same time regardless of an input voltage level. The apparatus includes: a rectification unit rectifying an AC voltage; a multi-channel light emitting diode unit including at least a first light emitting diode and a second light emitting diode, and being driven by receiving the rectified current; a current sensor unit sensing a current flowing in the first light emitting diode; a current mirror unit mirroring the current sensed by the current sensor, and supplying the mirrored current to the second first light emitting diode; and a sequential current driving unit connected to the first light emitting diode and the second light emitting diode, providing a path to a current flowing in the first light emitting diode or in the second light emitting diode, and activating the current sensor unit.

Abstract: Disclosed is an apparatus for synchronous driving of multi-channel light emitting diodes capable of driving all light emitting diodes at the same time regardless of an input voltage level. The apparatus includes: a rectification unit rectifying an AC voltage; a multi-channel light emitting diode unit including at least a first light emitting diode and a second light emitting diode, and being driven by receiving the rectified current; a current sensor unit sensing a current flowing in the first light emitting diode; a current mirror unit mirroring the current sensed by the current sensor, and supplying the mirrored current to the second first light emitting diode; and a sequential current driving unit connected to the first light emitting diode and the second light emitting diode, providing a path to a current flowing in the first light emitting diode or in the second light emitting diode, and activating the current sensor unit.

Abstract: A curved-type optical lens assembly and an electronic device are provided. The optical lens assembly focuses an image of an object on the image sensor. The optical lens assembly includes a reflector configured to reflect incident light, a lens array including a plurality of lenses arranged between the reflector and the image sensor, a first light blocker arranged at an object side of the reflector to block the light, and a second light blocker arranged at an image side of the reflector to block the light. The optical lens assembly further includes a first optical axis of the light proceeding towards the reflector and a second optical axis of the light reflected by the reflector.

Abstract: A wireless power transmission apparatus for high efficiency energy charging, includes a resonator configured to transmit power, and a power supply unit configured to supply power to the resonator. The apparatus further includes a first switching unit configured to connect the resonator to the power supply unit, and disconnect the resonator from the power supply unit, and a controller configured to control the first switching unit based on an amount of current flowing into the resonator.

Abstract: A power switch capable of preventing a reverse connection is provided. The power switch includes a switch that is configured to supply power of a battery to a load or block the power of the battery and a protector that is connected to an output terminal of the switch and blocks the power applied from the battery when the battery is reversely connected and a driver is configured to operate a driving of the switch and the protector.

Abstract: A wireless power transmission apparatus for high efficiency energy charging, includes a resonator configured to transmit power, and a power supply unit configured to supply power to the resonator. The apparatus further includes a first switching unit configured to connect the resonator to the power supply unit, and disconnect the resonator from the power supply unit, and a controller configured to control the first switching unit based on an amount of current flowing into the resonator.

Abstract: A wireless power transmission apparatus includes a resonator configured to transmit power to another resonator, and a power supply unit configured to supply power to the resonator. The apparatus further includes a switching unit including a transistor configured to be turned on to connect the power supply unit to the resonator, and to be turned off to disconnect the power supply unit from the resonator, based on a control signal, and a diode connected in series to the transistor.

Abstract: A device for driving a multi-channel light-emitting diode, includes a power supply unit for supplying power supplied from the outside; a light-emitting diode block, which is connected to a (+) terminal of the power supply unit and includes one or more light-emitting diode groups, each including at least one light-emitting diode; a current commutation unit, which is connected to a cathode of the light-emitting diode block and commutates a current flowing through the light-emitting diode groups; a reference voltage unit, which is electrically connected to the current commutation unit and provides a reference voltage to the current commutation unit; and a current driving unit for receiving power from the power supply unit, driving the light-emitting diode block through the current commutation unit, and determining a driving current flowing through the light-emitting diode groups.

Abstract: A device for driving a multi-channel light-emitting diode, includes a power supply unit for supplying power supplied from the outside; a light-emitting diode block, which is connected to a (+) terminal of the power supply unit and includes one or more light-emitting diode groups, each including at least one light-emitting diode; a current commutation unit, which is connected to a cathode of the light-emitting diode block and commutates a current flowing through the light-emitting diode groups; a reference voltage unit, which is electrically connected to the current commutation unit and provides a reference voltage to the current commutation unit; and a current driving unit for receiving power from the power supply unit, driving the light-emitting diode block through the current commutation unit, and determining a driving current flowing through the light-emitting diode groups.

Abstract: A wireless power transmission apparatus for high efficiency energy charging, includes a resonator configured to transmit power, and a power supply unit configured to supply power to the resonator. The apparatus further includes a first switching unit configured to connect the resonator to the power supply unit, and disconnect the resonator from the power supply unit, and a controller configured to control the first switching unit based on an amount of current flowing into the resonator.

Abstract: A wireless power transmission apparatus includes a resonator configured to transmit power to another resonator, and a power supply unit configured to supply power to the resonator. The apparatus further includes a switching unit including a transistor configured to be turned on to connect the power supply unit to the resonator, and to be turned off to disconnect the power supply unit from the resonator, based on a control signal, and a diode connected in series to the transistor.

Abstract: There is provided a device for transferring an optical element including: a differential transmitter including an intermediate ring rotatably with respect to a housing and having a plurality of openings on its circumference, first decelerating members rotatably inserted into ones of the openings, a first transmitting ring disposed on one side of the intermediate ring to contact the first decelerating members, and a second transmitting ring disposed on an opposite side of the intermediate ring; a driving element generating a driving force to rotate the first transmitting ring; a manual manipulation ring transmitting a rotation force generated due to manual manipulation to the second transmitting ring; a moving portion that supports the optical element and moving along the direction of an optical axis; and a cam rotating due to connection with the intermediate ring and having a cam groove connected with the moving portion.

Abstract: There is provided a device for transferring an optical element including: a differential transmitter including an intermediate ring rotatably with respect to a housing and having a plurality of openings on its circumference, first decelerating members rotatably inserted into ones of the openings, a first transmitting ring disposed on one side of the intermediate ring to contact the first decelerating members, and a second transmitting ring disposed on an opposite side of the intermediate ring; a driving element generating a driving force to rotate the first transmitting ring; a manual manipulation ring transmitting a rotation force generated due to manual manipulation to the second transmitting ring; a moving portion that supports the optical element and moving along the direction of an optical axis; and a cam rotating due to connection with the intermediate ring and having a cam groove connected with the moving portion.

Abstract: A lens barrel and a photographing apparatus including the lens barrel include a clutch assembly disposed on a plane orthogonal to an optical axis between a manual adjustment ring and a distance adjustment ring.