Abstract: According to an aspect of the invention, a lighting control method is conceived for controlling the illumination of a working area, wherein an RFID-enabled light sensor attached to said working area measures incident light on the working area, and wherein an RFID-enabled luminary periodically reads the measured incident light from the RFID-enabled light sensor and adapts its light level in dependence on the measured incident light, such that a predefined illumination level on the working area is maintained.
Abstract: An LED controller reduces jitter of an LED lamp. In one embodiment, the LED controller includes a jitter detection circuit adapted to determine an amount of jitter in an input voltage signal. The input voltage signal includes a plurality of cycles and indicates an amount of dimming for the LED lamp. The LED controller further includes a jitter compensation circuit, which generates a control signal to control regulated in the LED lamp such that an output light intensity of the LED lamp substantially corresponds to the amount of dimming for the LED lamp. The control signal controls current delivery to the LED lamp to compensate for the determined amount of jitter in the input voltage signal.
Abstract: In one embodiment, a pulse-width modulation (PWM) dimming control method for a light-emitting diode (LED) load, can include: (i) receiving a PWM dimming signal and a clock signal in a control circuit, where the clock signal is used to determine an effective width of the PWM dimming signal; (ii) setting a minimum value of the effective width of the PWM dimming signal; (iii) using the PWM dimming signal as a dimming control signal when the effective width of the PWM dimming signal is greater than the minimum value; (iv) regulating the effective width of the PWM dimming signal as the minimum value, and using the regulated PWM dimming signal as the dimming control signal, when the effective width of the PWM dimming signal is less than the minimum value; and (v) controlling a driving current of the LED load according to the dimming control signal.
Abstract: A system and method for interconnecting LED modules that receive electrical energy from a direct current electrical energy power supply includes a first type of mating connector to provide an input of direct current electrical energy to a printed circuit board contained within an interconnectable LED module and a second type of mating connector to provide an output of direct current electrical energy to and interconnecting with another interconnectable LED module. The second type of mating connector attaches to the first type of mating connector in the next LED module in a string of interconnectable LED modules.
Abstract: A method for controlling a plurality of lamps is applied to an electrical apparatus, such that the user can control the plurality of lamps by the electrical apparatus. The method includes the following steps: receiving a plurality of different identification codes, with the identification codes representing each of the lamps respectively; setting at least two different identification codes of the plurality of identification codes to be in the same control group according to a group setting command; and setting the control parameter of each of the plurality of lamps represented by each of the plurality of different identification codes of the same control group to be the same.
Abstract: A vehicular lamp has a light-emitting portion connected in series to an input terminal to which a power supply voltage based on an on-board battery is configured to be applied, and having a plurality of light-emitting elements connected in series, a series connection circuit having a first current limiting resistor and a second current limiting resistor, which is inserted in series between the input terminal and the light-emitting portion, a resistor switching switch connected in parallel to one of the first current limiting resistor and the second current limiting resistor, bypass switches, each of which is connected in parallel to a required one of the light-emitting elements in the light-emitting portion, and a control circuit that turns off the resistor switching switch when at least one of the bypass switches is turned on.
Abstract: Plasma generation source employing dielectric conduit assemblies having removable interfaces and related assemblies and methods are disclosed. The plasma generation source (PGS) includes an enclosure body having multiple internal surfaces forming an internal chamber having input and output ports to respectively receive a precursor gas for generation of plasma and to discharge the plasma. A dielectric conduit assembly may guide the gas and the plasma away from the internal surface where particulates may be generated. The dielectric conduit assembly includes a first and second cross-conduit segments. The dielectric conduit assembly further includes parallel conduit segments extending from the second cross-conduit segment to distal ends which removably align with first cross-conduit interfaces of the first cross-conduit segment without leaving gaps. In this manner, the dielectric conduit assembly is easily serviced, and reduces and contains particulate generation away from the output port.
Abstract: A plug-in auxiliary headlight control unit (AHCU) repairs a damaged LCM and assures headlight performance. The plug-in AHCU contains an alternate lighting control circuitry, vehicle wiring harness connectors, LCM connectors, and a power relay, arranged on a chassis. The AHCU plugs into the failed LCM unit utilizing existing connectors for the vehicle's wiring harness. This arrangement places the AHCU in-line between the vehicle's wiring harness and the LCM.
Abstract: Disclosed are a light emitting diode illumination apparatus and a control method thereof. The light emitting diode illumination apparatus includes a light source that includes a plurality of light emitting diode channels including one or more light emitting diodes, and emits light by application of a rectified voltage obtained by converting an AC voltage, and a control circuit that selectively provides current paths according to a change in a level of the rectified voltage through a plurality of switching circuits connected to the light emitting diode channels, and controls pulse widths of control pulses provided to the switching circuits such that an current supplied to the light source of each channel follows a waveform of the rectified voltage.
Abstract: An LED lamp comprises: a first LED part, a second LED part that is connected to the first LED part in parallel and is configured to emit a light with a color temperature lower than that of a light to be emitted from the first LED part, and an impedance circuit that is connected to the first LED part in parallel while being connected to the second LED part in series.
Abstract: An ignition apparatus has an ignition transformer that has a primary winding and a secondary winding. The transformer has a first primary winding connection for connection to a first supply voltage potential and a second primary winding connection for connection to a second supply voltage potential via a controllable switching element. Accordingly a first capacitor is connected up between the first primary winding connection and the second supply voltage potential and a second capacitor is connected up between the second primary winding connection and the second supply voltage potential.
Abstract: There is provided a light emitting diode driver capable of improving power efficiency by using a resistor having a low power consumption rating while controlling an LED channel so that it has constant brightness stably. The light emitting diode driver includes: a power supplying unit converting an input voltage into a predetermined driving voltage so as to supply the driving voltage to an LED channel; and a driving unit amplifying a detection voltage detected based on a current from the LED channel by a predetermined gain and controlling the current flowing through the LED channel so that the amplified detection voltage has a level equal to that of a predetermined reference voltage.
January 24, 2014
Date of Patent:
September 29, 2015
SAMSUNG ELECTRO-MECHANICS CO., LTD.
Jung Eui Park, Jin Soo Lee, Byoung Woo Ryu, Seung Kon Kong, Dae Hoon Han, Bo Hyun Hwang
Abstract: A light bulb-shaped lamp according to the present invention includes: a board on which an LED is mounted; a circuit board on which a drive circuit that turns on the LED is mounted; output wires for supplying power for turning on the LED from the drive circuit to the LED; a pedestal; and a potential-stabilizing wire electrically connecting the pedestal to a circuit ground of the drive circuit.
Abstract: An interface circuit interfaces a device with a line-pair. The interface circuit includes: a diode bridge having polarity-independent input terminals coupled to the line-pair, and first and second output terminals having a positive polarity and a negative polarity, respectively; a first galvanic isolation device for outputting a receive signal received on the line-pair via the diode bridge; a second galvanic isolation device receiving a transmit signal; a voltage-controlled variable resistance element connected across the positive and negative output terminals of the diode bridge; and first and second filters cascaded between the second galvanic isolation device and the voltage-controlled variable resistance element. The first filter has decoupled charge and discharge paths so as to decouple the rise time and the fall time of the transmit signal. The second filter has a voltage-dependent frequency characteristic.
Abstract: The present invention provides a light emitting device power supply circuit with dimming function and a control circuit thereof. The light emitting device power supply circuit includes: a phase-cut dimming circuit, a rectifier circuit, a transformer circuit, and a control circuit. The transformer circuit includes an auxiliary winding, which is coupled to a primary winding, for generating a bleeder current to keep a conduction current higher than a holding current and prevent the phase-cut dimming circuit from turning OFF when the phase-cut dimming circuit operates in conductive phase. The control circuit includes a waveform analysis circuit, a bleeder current control circuit, and a bleeder current source. The bleeder current source includes a linear regulator or a variable current source. The bleeder current source controls the bleeder current so that the bleeder current is generated in a continuous and non-switching manner within the conductive phase.
December 11, 2014
Date of Patent:
August 25, 2015
RICHTEK TECHNOLOGY CORPORATION
Yi-Wei Lee, Isaac Y. Chen, Tong-Cheng Jao, Chien-Yang Chen
Abstract: A filament preheat module for preheating a filament of a lamp powered by a power circuit including an inverter, the inverter comprising an inductively coupled conductor, an inductively coupled conductor of the filament preheat module magnetically coupled to the inductively coupled conductor of the inverter to power the filament during preheating, and a switching circuit configured to electrically connect the power from the inductively coupled conductor of the filament preheat module to the filament. The switching module is configured to cutoff the power to the filament from the filament preheat module after a predetermined time period during preheating.
Abstract: An apparatus, method and system for controlling one or multiple lighting sources such as those powered by driver circuits or voltage splitting methods, to provide an alternative current path around a failed lighting source when one or more individual lighting sources fail.
Abstract: A driving device comprises a first transistor (B13), a second transistor (B14), and a resistance element. The first transistor (B13) has one terminal receiving a pulsed current and a control terminal connected to the one terminal. The second transistor (B14) has one terminal connected to at least one load, the other terminal connected to a reference potential together with the other terminal of the first transistor (B13), and a control terminal connected to the control terminal of the first transistor (B13). The resistance element is connected between the control terminal of the first transistor (B13) and the other terminal of the first transistor (B13).
Abstract: Disclosed is a light emitting diode (LED) illuminating apparatus having enhanced stability of the quantity of light. The LED illuminating apparatus includes an LED lighting block connected to a rectified voltage and including at least one LED module, an alternative reference voltage generating block configured to detect the rectified voltage and generate an alternative reference voltage, and a switching block connected to the tap and configured to form a closed circuit including the at least one LED module. The at least one LED module includes a cathode terminal having a tap. The alternative reference voltage has a voltage level according to a root mean square (RMS) value of the rectified voltage. The amount of currents flowing through the closed circuit is controlled by the alternative reference voltage to have a negative relationship with the RMS value of the rectified voltage.
Abstract: The present invention is suitable for an LED controlling field, and provides an LED controlling circuit with high power factor and an LED lighting device. In the present invention, by using an LED current controlling circuit with high power factor comprising a plurality of output current controlling modules, a resistor Re and a reference voltage generating module, the LED groups is driven accordingly in a piecewise manner to be on and a current flows through the LED groups according to the input voltage of the LED strip, without sampling the input voltage of the LED strip by a sampling circuit and without increasing the number of high cost component, which increase the utilization of the LED, the power factor of the whole LED controlling circuit and the efficiency of the system, thereby solving the problem of low power factor and low efficiency system existing in the prior art.