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: The present invention is a light emitting diode lamp structure, which comprises a heat dissipating plane, a light emitting housing and a base. The light emitting housing further comprises a casing and a first hollow region. The heat dissipating plane is partly covered by the casing and the rest of the heat dissipating plane is shown in the first hollow region. The part of the heat dissipating plane covered by the casing further includes a plurality of LEDs. The base is mounted with the light emitting housing and electrically engaged with the LEDs.

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 includes a base seat and a plurality of LEDs. The base seat includes a planar portion having a planar external surface and a straight portion connected interactively 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 and a second LED mounted on the straight external surface of the straight portion to emit light rays in the horizontal direction.

Abstract: The LED driver of the present invention comprises multiple LED arrays, at least one dividing diode, a power module, a driving module, at least one switch pair and a voltage sensing module. Each LED array comprises multiple LEDs connected in series. The dividing diode is mounted between adjacent LED arrays. The power module is connected to an external power source and forms a pulsating direct current (DC) voltage. The driving module receives the pulsating DC voltage outputs a constant current to the LED arrays. The voltage sensing module closes and opens the switch pairs that changes electrical configuration of the LED arrays. The LED driving method of the present invention comprises setting multiple voltage drops and at least one reference voltage; sensing an incoming voltage to compare with the reference voltage; and changing ways of connections of LED arrays based on the reference voltage and the incoming voltage.

Abstract: A lamp includes a tube-shaped lamp shade with a space, a first light-emitting diode (LED) light source, a first diffuser, a second LED light source, a second diffuser, and two covers. A spacer extending along the direction of the length of the tube-shaped lamp shade is disposed in the space. The spacer has a first surface and a second surface, and the tube-shaped lamp shade has a first slot and a second slot. The first LED light source is disposed on the first surface. The first diffuser is disposed in the first slot, and a first hole is formed at the first diffuser. The second LED light source is disposed on the second surface. The second diffuser is disposed in the second slot. The two covers are disposed at two ends of the tube-shaped lamp shade respectively, and each cover has a second hole.

Abstract: The present invention is a light emitting diode lamp structure, which comprises a heat dissipating plane, a light emitting housing and a base. The light emitting housing further comprises a casing and a first hollow region. The heat dissipating plane is partly covered by the casing and the rest of the heat dissipating plane is shown in the first hollow region. The part of the heat dissipating plane covered by the casing further includes a plurality of LEDs. The base is mounted with the light emitting housing and electrically engaged with the LEDs.

Abstract: A constant current device in accordance with the present invention is connected to an external voltage source and comprises an input unit, a driving transistor and a voltage control unit. The input unit is connected to the external voltage source. The driving transistor is used to output constant current. The voltage control unit makes the driving output constant current and comprises at least one resistor and a semiconductor load, and has a resistor voltage, the resistor comprising an input and an output.

Abstract: The LED driver of the present invention comprises multiple LED arrays, at least one dividing diode, a power module, a driving module, at least one switch pair and a voltage sensing module, Each LED array comprises multiple LEDs connected in series. The dividing diode is mounted between adjacent LED arrays. The power module is connected to an external power source and forms a pulsating direct current (DC) voltage. The driving module receives the pulsating DC voltage outputs a constant current to the LED arrays, The voltage sensing module closes and opens the switch pairs that changes electrical configuration of the LED arrays. The LED driving method of the present invention comprises setting multiple voltage drops and at least one reference voltage; sensing an incoming voltage to compare with the reference voltage; and changing ways of connections of LED arrays based on the reference voltage and the incoming voltage.

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 lamp assembly includes a lamp device mounted detachably on a stand unit. The lamp device includes a lampshade for receiving a light emitting element. An electrical connector is coupled electrically to the light emitting element and a power source in such a manner that when the lamp device is mounted on the stand unit, the electrical connector is plugged into the power source so that the light emitting element is supplied with electricity by the power source. A storage battery module is coupled electrically to the electrical connector and the light emitting element so that when the lamp device is mounted on the stand unit, the storage battery module is charged by the power source via the electrical connector. When the lamp device is detached from the stand unit, the light emitting element is supplied with electricity by the storage battery module.

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: 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 LED (Light Emitting Diode) module includes a base seat and a plurality of LEDs. The base seat includes a planar portion having a planar external surface and a straight portion connected interactively 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 and a second LED mounted on the straight external surface of the straight portion to emit light rays in the horizontal direction.

Abstract: A lamp includes a tube-shaped lamp shade with a space, a first light-emitting diode (LED) light source, a first diffuser, a second LED light source, a second diffuser, and two covers. A spacer extending along the direction of the length of the tube-shaped lamp shade is disposed in the space. The spacer has a first surface and a second surface, and the tube-shaped lamp shade has a first slot and a second slot. The first LED light source is disposed on the first surface. The first diffuser is disposed in the first slot, and a first hole is formed at the first diffuser. The second LED light source is disposed on the second surface. The second diffuser is disposed in the second slot. The two covers are disposed at two ends of the tube-shaped lamp shade respectively, and each cover has a second hole.