Abstract:
An alternating current (AC) light emitting diode (LED) luminescent apparatus includes: a rectification unit configured to: receive an AC input; and output, via full-wave rectification, a rectified voltage; light emitting groups configured to sequentially receive the rectified voltage in associated with corresponding emission periods; light emitting group driving units configured to respectively control current applied to the light emitting groups; and an LED driving integrated circuit configured to sequentially operate the light emitting groups based on voltage levels of the rectified voltage. Each emission period includes: a first portion associated with a constant current level; and a second portion associated with a higher current level than the constant level, the second portion occurring before the first portion.
Abstract:
An alternating current (AC) light emitting diode (LED) luminescent apparatus includes: a substrate including a light emitting surface; a plurality of LEDs disposed on the light emitting surface, the plurality of LEDs being divided into "m" light emitting groups, "m" being a positive integer greater than 2; and an LED driving integrated circuit (IC) disposed on the substrate, the LED driving IC being configured to sequentially drive the LEDs in a first light emitting group to the m th lighting group in accordance with a voltage level of a rectified voltage. The substrate is divided into a plurality of regions, each region including a plurality of light emitting segments, each light emitting segment including LEDs of at least two of the plurality of light emitting groups. An average current of LEDs disposed in each region is substantially equivalent to an average current of LEDs disposed in an adjacent region.
Abstract:
The LED lighting apparatus includes: a rectification block; an LED block including a first light emitting group and a second light emitting group; a charging/discharging block configured to charge electric charges in a charging period, and discharge electric charges in a discharging period; a driving control unit configured to determine a voltage level of a rectified voltage, controls a path selection switch to connect the rectification block to the LED block and controls the charging/discharging block to charge electric charges in the charging period, and controls the path selection switch to connect the rectification block to a ground and controls the charging/discharging block to discharge electric charges from the charging/discharging block to the LED block in the discharging period; and a path selection switch configured to connect the rectification block to the LED block in the charging period, and connect the rectification block to the ground in the discharging period.
Abstract:
A light emitting diode (LED) illuminating apparatus includes a heat sink, a light emitting module, a power connection portion, a translucent cover and a wiring path. The heat sink has a plurality of heat dissipation fins. The light emitting module is positioned on an upper portion of the heat sink. The power connection portion is positioned below a lower portion of the heat sink. The translucent cover is mounted to cover an upper portion of the light emitting module. The wiring path is formed in the heat sink so as to accommodate a wire for electrically connecting the power connection portion and the light emitting module. In the LED illuminating apparatus, the light emitting module emits light by directly receiving AC power supplied through the wire accommodated in the wiring path.
Abstract:
An optical semiconductor lighting apparatus is provided. At least one or more clamping units are formed along a longitudinal direction of a race way. A first sealing unit finishes both ends of a housing attached to or detached from the clamping unit. A second sealing unit surrounds upper and lower portions of both edges of an optical member disposed on the bottom surface of the housing. A wireless communication unit receives a dimming signal through a wireless communication network, and outputs the received dimming signal to a power supply unit. The power supply unit receives an AC voltage, converts the received AC voltage into a DC voltage, and supplies the DC voltage to a light emitting module. The power supply unit controls the illuminance of the light emitting module according to the dimming signal input from the wireless communication unit. The light emitting module is connected to the power supply unit and is driven according to the control of the power supply unit.