Abstract:
A lamp assembly includes a bottom seat and a lampshade. The lampshade includes a lamp cover holding a light emitting element therein, and a connecting arm having a first end connected to the lamp cover and a second end connected pivotally to the bottom seat at a pivot point thereof. The lamp cover and the connecting arm are integrally formed with each other as one-piece unit.
Abstract:
A limiting current circuit that has output short circuit protection is connected to an external voltage source and comprises an output terminal, an input current unit, a driving transistor, a voltage control resistor, a voltage control transistor and a delay unit. The output terminal is connected to a load and has an output current. The driving transistor has an internal resistance, a drain current and a gate voltage. The voltage control resistor has a resistor voltage. The voltage control transistor has an internal resistance and a parasitic capacitance. The delay unit makes the resistor voltage charging the parasitic capacitance to extend the period of lower internal resistance of the voltage control transistor and the period of higher internal resistance of the driving transistor, makes the internal resistance of the voltage control transistor is less than the internal resistance of the driving transistor when the load is shorted.
Abstract:
An LED (Light Emitting Diode) module (30) includes a base seat (32) and a plurality of LEDs (34). The base seat includes a planar portion (3202) having a planar external surface and a straight portion (3204) connected to the planar portion, and having a straight external surface. The plurality of LEDs includes a first LED mounted on the planar external surface of the planar portion to emit light rays in the facing in a vertical direction (D1) and a second LED mounted on the straight external surface of the straight portion to emit light rays in the horizontal direction (D2).
Abstract:
A light emitting diode lamp structure comprises a heat dissipating plane (10), a light emitting housing (20) and a base (30), which light emitting housing (20) is constructed by two transparent elements (20a) each comprising a casing (22) and a first hollow region (24), which heat dissipating plane (10) including a plurality of LEDs is partly covered by the casing (22) and partly revealed in the first hollow region (24), and which base (30) is mounted with the light emitting housing (20) and electrically engaged with the LEDs.
Abstract:
A lamp assembly includes a bottom seat and a lampshade. The lampshade includes a lamp cover holding a light emitting element therein, and a connecting arm having a first end connected to the lamp cover and a second end connected pivotally to the bottom seat at a pivot point thereof. The lamp cover and the connecting arm are integrally formed with each other as one-piece unit.
Abstract:
An AC LED module includes a substrate, a bridge rectifier unit a constant current unit and an LED chip set. The bridge rectifier unit mounted on the substrate further includes an output and an input coupled with an AC source. The constant current unit, mounted on the substrate and coupled with the output of the bridge rectifier unit, further includes at least one current regulative diode. The LED chip set mounted also on the substrate is electrically coupled with the constant current unit.
Abstract:
An AC LED module with an improved power factor for coupling with an AC source includes a plurality of LED strings and a plurality of connecting-to-middle drive elements. The LED strings are coupled in parallel between two ends of the AC source, and each of the LED strings further includes a respective number of LEDs connected in series. The connecting-to-middle drive element assigned to a respective LED string has two connection point, one connected to one end of the AC source while another being connected with a middle point between two consecutive LEDs in the same LED string.
Abstract:
A limiting current circuit that has output short circuit protection is connected to an external voltage source and comprises an output terminal, an input current unit, a driving transistor, a voltage control resistor, a voltage control transistor and a delay unit. The output terminal is connected to a load and has an output current. The driving transistor has an internal resistance, a drain current and a gate voltage. The voltage control resistor has a resistor voltage. The voltage control transistor has an internal resistance and a parasitic capacitance. The delay unit makes the resistor voltage charging the parasitic capacitance to extend the period of lower internal resistance of the voltage control transistor and the period of higher internal resistance of the driving transistor, makes the internal resistance of the voltage control transistor is less than the internal resistance of the driving transistor when the load is shorted.