Abstract: An LED lamp includes a base, a bracket, a knob pivotably interconnecting the base and the bracket, and a reflector facing the base. The bracket includes two perpendicular arms on which multiple first LED modules and second LED modules are mounted. The first LED modules emit warm light, and the second LED modules emit cold light. The first LED modules and the second LED modules are selective to lighten by manipulating a button attached to the base.

Abstract: An LED device comprises an LED assembly and a power supply circuit. The power supply circuit includes an AC circuit connecting to the power source, a DC circuit coupling with the AC circuit, a driving circuit and a snubber circuit connected with each other and located between the DC circuit and the LED assembly. The locations of the driving circuit and the snubber circuit in the power supply circuit are exchangeable, i.e., the driving circuit being connected to the DC circuit and the snubber circuit being connected to the LED assembly, or the driving circuit being connected to the LED assembly and the snubber circuit being connected to the DC circuit. The snubber circuit is used for extending a time period for a voltage value of a DC initially applied to the LED assembly to increase from zero to a predetermined value.

Abstract: A lamp includes a lamp head, a lamp rod and a fastening device fixing the lamp head onto the lamp rod. The fastening device includes a tube-shaped lamp seat extending from the lamp head, a tightening device disposed in the lamp seat, a connecting device connecting the tightening device to the lamp seat, and a locking device mounted to the lamp seat. The tightening device includes an inner face and an outer face opposite to the inner face. The inner face of the tightening device and an inner face of the lamp seat sandwiching an end of the lamp rod therebetween. The tightening device can move along a radial direction of the lamp seat. The locking device presses the tightening device toward the end of the lamp post to urge the tightening device to tightly press the lamp rod.

Abstract: A lamp assembly includes a storage tank, a lamp, a liquid inlet pipe, a liquid outlet pipe and an actuator. The storage tank contains liquid therein. The lamp includes a lighting portion and a lid located at a top of the lighting portion. A flume is defined between a top end of the lighting portion and the lid. The liquid inlet pipe connects a first end of the storage tank and a corresponding end of the flume. The liquid outlet pipe connects an opposite second end of the storage tank and a corresponding end of the flume of the lamp. The actuator drives the liquid to circulate between the storage tank and the flume of the lamp to thereby dissipate heat generated by the lamp.

Abstract: An LED includes a bowl-like substrate, three posts embedded within the substrate, an LED die bonded to a middle post, a pair of spiral gold wires interconnecting two electrodes of the LED die and two lateral posts, and an encapsulant sealing the LED die and fixed on the substrate. The two wires are further wound around two columns protruded upwardly from the substrate, respectively. The two columns may be made integrally with the substrate, or be employed as upper portions of the two lateral posts in the case of the two lateral posts extending upwardly beyond the substrate.

Abstract: An LED illumination system includes an LED lamp, a voltage stabilizing circuit and a control circuit. The LED lamp includes an LED string which has a plurality of LEDs connected in series. The voltage stabilizing circuit connects the LED lamp for supplying an electric current to the LED string. The control circuit includes an MCU and a MOSFET connected between the MCU and the LED string. The MCU detects the electric current flowing through the LED string and outputs a PWM signal which has a frequency within a range from 60 Hz to 500 Hz to the MOSFET. The MOSFET receives the PWM signal from the MCU and turns on and off repeatedly under a control of the PWM signal, to make a flicker frequency of the LEDs of the LED string be within a predetermined range.

Abstract: An LED illumination system includes a control circuit having a timing unit, a control unit, a PWM signal generating unit and a micro-programmed control unit (MCU). The timing unit divides an operating period of an LED lamp into different time segments, and outputs clock signals. The control unit outputs different controlling signals corresponding to the clock signals to the PWM signal generating unit, which in turn generates different PWM signals with different duty cycles. A constant current circuit electrically connects the control circuit and outputs different electric currents to make the LED lamp emit light having different light intensities at the different time segments. The MCU is at an outside of the LED lamp and sets a program to control the timing unit, the control unit and the PWM signal generating unit.

Abstract: A lamp control system includes a first driving circuit, an assistance DC power source having an output voltage lower than a working voltage of a lamp and a second driving circuit. The first driving circuit electrically connects the lamp with a utility power source to convert an AC power a DC power and supply the DC power to the lamp. The second driving circuit electrically connects the assistance DC power source with the lamp. The second driving circuit includes a boost circuit, which is connected to the assistance DC power source to promote the output voltage of the assistance DC power source to the working voltage of the lamp and then supply electrical power with the promoted voltage to the lamp when the utility power source is off.

Abstract: An LED illumination system includes a control circuit having a timing unit, a control unit and a PWM signal generating unit. The timing unit divides an operating period of an LED lamp into a plurality of time segments, and outputs a clock signal at a start of each time segment to the control unit. The control unit outputs different controlling signals corresponding to the clock signals to the PWM signal generating unit, which in turn generates different PWM signals with different duty cycles. A constant current circuit electrically connects the control circuit to the LED lamp. The constant current circuit outputs different electric currents to the LED lamp according to the PWM signals, to thereby control the LED lamp to emit light having different light intensities at the various time segments of the operating period.

Abstract: A lamp includes a lamp body, a control module and a solar energy collector. The solar energy collector includes a first motor, a second motor coupled to the first motor, a solar energy absorption board, and a detection apparatus mounted on the solar energy absorption board. The solar energy absorption board coupled to the second rotary rod. The detection apparatus includes two first photosensitive resistors mounted opposite to each other and two second photosensitive resistors mounted opposite to each other. The control module controls the first motor to rotate when a voltage difference between the first photosensitive resistors is detected; the control module controls the second motor to rotate when a voltage difference between the second photosensitive resistors is detected.

Abstract: An LED unit includes an LED having an optical axis and a lens mounted on the LED. The lens includes an incidence surface, an emission surface, and a light-reflecting face between the incidence surface and the emission surface. The light-reflecting face has a diameter gradually increasing from a bottom towards a top of the lens. The incidence surface includes a first incidence surface and a second incidence surface extending downwardly from a circumference of the first incidence surface and protruding inwardly towards the LED. Light emitted from the LED with a large angle is refracted by the second incidence surface into substantially parallel beams in one side of a cross-section of the lens through the optical axis of the LED, and the parallel beams are sequentially reflected by the light-reflecting face and refracted by the emission surface out of the lens in substantially parallel beams.

Abstract: A control circuit of an LED lamp includes a voltage regulator, at least a photo resistor and a feedback circuit. The voltage regulator includes an output terminal and a feedback terminal. The feedback circuit includes an amplifier having a first input end, a second input end and an output end. The LED lamp is connected between the first input end of the amplifier and the output terminal of the voltage regulator. The at least a photo resistor can sense a change of brightness level of an environment surrounding the LED lamp and a resistance of the at least a photo resistor increases along with a decrease of the brightness level. The change of resistance of the photo resistor is fed back to the voltage regulator via the amplifier, to thereby control an electric current flowing through the LED lamp.

Abstract: A light emitting diode (LED) lamp includes a lamp body, an LED module mounted on an end of the lamp body and a switching member mounted on the lamp body. The LED module has LEDs facing outwards. The switching member is capable of switching the LED lamp between N type of working modes including modes I1, I2, . . . In. The LEDs are connected with each other in series into an LED string. The modes I1, I2, . . . In correspond to n different connecting points of the LED string.

Abstract: An exemplary light emitting diode (LED) lamp includes a lamp body, an LED module and a switching member. The LED module is mounted on the lamp body and includes a plurality of first LED components emitting a first light with a first color temperature and a plurality of second LED components emitting a second light with a second color temperature. The switching member is mounted around the lamp body and can be operated to cause the LED lamp to work in different modes. In the different modes, different numbers of the first and second LED components are driven to emit light with different color temperatures.

Abstract: A protecting circuit for an LED unit includes first, second, third and fourth diodes. A cathode of the second diode couples to an anode of the first diode, and a cathode of the third diode couples to a cathode of the first diode. The fourth diode includes an anode coupling to the anode of the second diode and a cathode coupling to the anode of the third diode. A first junction is formed between the first and second diodes, a second junction is formed between the third and fourth diodes, a third junction is formed between the second and fourth diodes, and a fourth junction is formed between the first and the third diodes. The first and the second junctions are connected to the LED unit. The third and fourth junctions are connected to a power source for supplying electric current to the LED unit.

Abstract: An LED (light emitting diode) includes a light emitting chip and a lens above the chip. The lens includes a base and a convex curved circumferential surface extending upwardly from a periphery of the base toward a center of the lens. An acute angle formed between a light ray generated by the chip and projecting on a point of the convex curved circumferential surface and a main axis of the lens extending vertically from a center of the chip is smaller than that formed between the normal for the point of the convex curved circumferential surface and the main axis of the lens so that light generated by the chip is converged by the lens. A light-emission angle of the LED at 10% of a peak light intensity of the LED is ranged between 60-75 degrees from the main axis.

Abstract: A lamp includes a bracket having a cover, a lamp body fixed to the bracket by a shaft, a heating device and a pressure switch. The lamp body includes first and second portions at opposite sides of the shaft. The heating device is mounted at the first portion of the lamp body and the cover. The pressure switch is mounted to the cover and engages with a top of the second portion. When a weight of the snow/ice accumulated on the first portion of the lamp body is beyond a set value, the pressure switch controls the heating device to be switched on to melt the snow/ice; when the weight of the snow/ice accumulated on the lamp body decreases to be less than the set value, the pressure switch controls the heating device to be switched off.

Abstract: A lamp includes a bracket, a cover and a lamp body pivotably engaged with the shaft. The bracket includes a shaft with a flat top surface. The lamp body includes a first lateral portion and a second lateral portion. The lamp body defines a channel with a flat top surface. The cover is mounted over the second lateral portion. When the lamp body is at a first position, the top surface of the channel engages the top surface of the shaft. When the first lateral portion of the lamp body is subjected to weight of snow/ice accumulated thereon which is beyond a set value, the lamp body rotates around the shaft from the first position to a second position to enable the snow/ice to fall from the first lateral portion.

Abstract: A lamp includes a bracket including a shaft and a limiting member and a lamp body pivotably engaged with the shaft. The lamp body includes a luminous portion and a counterweight portion at different sides of the shaft. When the lamp body is at a first position, the luminous portion of the lamp body abuts the limiting member; when the luminous portion is subjected to an exterior force which is caused by weight of snow/ice accumulated on the luminous and excesses a set value, the lamp body rotates around the shaft from the first position to a second position; when the exterior force disappears or decreases to be less than the set value, the lamp body returns from the second position to the first position. The lamp can automatically remove the snow/ice accumulated on the lamp body.

Abstract: A control circuit for controlling current through LEDs of an LED lamp includes a voltage regulator, a feedback circuit with an amplifier and a photo-resistor. The voltage regulator includes an output terminal connecting with the LEDs and a feedback terminal The amplifier includes an in-phase input end coupling with an output end of the LEDs, an out-phase input end and an output end connected to the feedback terminal of the voltage regulator. The photo-resistor is connected between the out-phase input end of the amplifier and the ground. The photo-resistor has a resistance increasing along with a decrease of the light intensity of the LEDs. The increase of resistance of the photo-resistor is fed back to the voltage regulator via the amplifier, to thereby increase the electric current through the LEDs to maintain the light intensity of the LED lamp within an acceptable range.