Class / Patent application number | Description | Number of patent applications / Date published |
315295000 | Regulator selectively connectable to plural circuits | 14 |
20080290818 | Method, System and Remote Control for Controlling the Settings of Each of a Multitude of Spotlights - Method for controlling the settings of each of a multitude of spotlights, such as light intensity, colour and light beam direction, wherein a remote control is used for sending control signals to a control system comprising a multitude of control units for changing the settings of said multitude of spotlights to desired values, which control units are each associated with one of said multitude of spotlights, wherein said control units can change the settings of their associated spotlights to the desired values, wherein each of said multitude of spotlights is radiating a unique light signal which is superimposed on its light beam, wherein the remote control comprises a sensor for determining said unique light signal, wherein the remote control sends with said control signal a spotlight identifying signal associated with the determined unique light signal as determined at the time that the remote control is used, and wherein the control unit associated with said spotlight identifying signal reacts to the combined spotlight identifying signal and control signal by changing its associated spotlight's settings to the desired values. | 11-27-2008 |
20090195189 | TRI-LIGHT - A lighting arrangement includes a light fixture including a plurality of light sources wherein each light source is configured to generate a different color light when energized; and a circuit arrangement included in the light fixture and operatively interposed between the plurality of light sources and a source of electrical power. This circuit arrangement is responsive to brief interruptions in the supply of electrical power of less than a predetermined period to simultaneously de-energize all of the light sources for a full duration of the interruption and to subsequently toggle energization from one light source to the next and thereby produce different color light in response to the cessation of the brief interruption. | 08-06-2009 |
20090237005 | ELECTRONIC DEVICE CAPABLE OF CONTROLLING LED BRIGHTNESS AND METHOD THEREOF - An electronic device capable of controlling light-emitting diode (LED) bright is provided. The electronic device includes a signal producing unit for producing an operation signal; a Micro Control Unit (MCU) configured for outputting a normal brightness control signal according to the operation signal, and outputting a ultra brightness control signal according to the operation signal when an actual idle time of the electronic device reaches or exceeds a predetermined idle time; a pulse current control unit for controlling an output current according to the normal brightness control and the ultra brightness control signal; and a LED illuminator array for emitting light based on the output current. The MCU terminates the output of the ultra brightness control signal when an actual time of outputting the ultra brightness control signals reaches a predetermined time, and then the LED illuminator array resumes its normally bright. A control method is also provided. | 09-24-2009 |
20100007290 | DRIVE DEVICE FOR LIGHT-EMITTING ELEMENT - A power converting unit supplies a predetermined current to each of light-emitting elements by controlling a duty ratio of a semiconductor switching element. A light-emitting-element selecting unit sequentially selects a light-emitting element to be supplied with the current from the power converting unit. A duty-ratio control unit controls the duty ratio of the semiconductor switching element based on a value obtained by multiplying a gain by a difference between an output current of the power converting unit and a target current. A gain selecting unit changes the gain according to selected light-emitting element. | 01-14-2010 |
20100102753 | Circuit Arrangement and Method for the Dimming Control of One or More Operating Device for Lamps - A circuit arrangement for dimming control of one or more operating devices ( | 04-29-2010 |
20100109570 | ELECTRICAL CIRCUIT FOR DRIVING LEDS IN DISSIMILAR COLOR STRING LENGTHS - An electrical circuit is disclosed. The electrical circuit comprises a plurality of color strings coupled in series, where each color string has at least one lamp, preferably a light emitting diode. The color strings may be of dissimilar length and may contain light emitting diodes of different colors. In one embodiment, a switch coupled in parallel with one of the color strings is configured to shunt power away from the color string to a power supply. In another embodiment, a switch coupled in parallel with one of the color strings is configured to shunt power away from the color string to one or more other color strings. In several embodiments, passive storage elements are utilized to store shunted power. In another embodiment, a current injector is configured to inject or remove current from a node adjacent to a color string. In several embodiments the invention is implemented as a light emitting diode driver integrated circuit or chip. Methods are disclosed for producing a desired light output utilizing color strings that may be of dissimilar length and that may contain light emitting diodes of different colors. | 05-06-2010 |
20100117562 | POWER SUPPLY CONTROLLER FOR MULTIPLE LIGHTING COMPONENTS - A power supply controller for a plurality of lighting components in a battery-powered apparatus. The power supply controller comprises a current source common to the lighting components, and a sequencer for coupling the current source sequentially to each of the lighting components with a repetition rate substantially faster than the flicker perception rate. Each of the lighting components comprises a respective array of lighting elements connected in series to receive the same current as the other lighting elements of the same lighting component. | 05-13-2010 |
20100213871 | BACKLIGHT DRIVING SYSTEM - A backlight driving system comprises a backlight driving circuit and a brightness regulation circuit. The brightness regulation circuit comprises a first regulation circuit to generate a first brightness regulation signal, a second regulation circuit to generate a second brightness regulation signal, a signal regulation circuit to combine the first and second brightness regulation signals into a combined brightness regulation signal according to a mode selection signal, and a driving control circuit to control the power delivered to the backlight from the backlight driving circuit according to the combined brightness regulation signal. | 08-26-2010 |
20100264847 | VOLTAGE CONVERTER, BACKLIGHT MODULE CONTROL SYSTEM AND CONTROL METHOD THEREOF - A backlight module control system includes a plurality of backlight sub-modules, a control signals output unit, a voltage converter and a plurality of current control units. The control signals output circuit is for providing a voltage control signal, a current control signal and a plurality of PWM signals; the voltage converter is coupled to the control signals output circuit and the backlight sub-modules, and is for outputting an output voltage to the backlight sub-modules according to the voltage control signal; the current control units are coupled to the backlight sub-modules, respectively, and each current control unit is for determining a current of its corresponding backlight sub-module according to the current control signal, and each current control unit is further utilized for determining whether its corresponding backlight sub-module is enabled or not according to its corresponding PWM signal. In addition, only one backlight module is enabled at a same time. | 10-21-2010 |
20110050128 | MODULE FOR CONTROLLING LIGHT EMITTING DIODE CURRENT FOR SELECTIVE FEEDBACK, APPARATUS AND METHOD FOR DRIVING LIGHT EMITTING DIODES USING THE SAME - The present invention provides a module for controlling an LED current for selective feedback, an apparatus and a method for driving LEDs using the same. The module for controlling the LED current, which is connected to a plurality of LED channels receiving driving powers supplied from at least one DC/DC converter and controls currents of the LED channels through a constant current, the LED current controlling module includes: an operation mode selector for selecting an operation mode according to an inputted enable signal level; a channel divider for dividing a plurality of LED channels into at least one group according to the selected operation mode; and a minimum voltage selector for selecting an LED channel with a minimum voltage, obtained by comparing voltages detected from each of lower ends of the LED channels included in each of one or more divided groups. | 03-03-2011 |
20110089864 | Method and Apparatus for Controlling Power in a LED Lighting System - The LED light fixture includes white LEDs having multiple, different color temperatures. Preferably, white LEDs having color temperatures of about 3500 and about 5000 degrees Kelvin (K) are selected. The intensity of each LED may be varied and the light radiated from the LEDs is mixed together. The resulting light emitted from the housing is a white light having a variable color temperature ranging from about 3500 to about 5000 K. The housing is preferably extruded aluminum. A portion of the housing is configured to mix the light together and to focus the light such that the output light is about thirty degrees off center. Electrical loading is off set to minimize load on power supplies. | 04-21-2011 |
20110148323 | CONTROL OF MULTI-STRING LED ARRAY - Apparatus, systems, and methods related to controlling multiple strings of light emitting diodes (LEDs) are disclosed. An apparatus may include internal current limiter circuits that are each coupled in series with an associated string of LEDs and are configured to at least partially regulate the current through the associated string of LEDs. The apparatus may also be configured to control external current limiter circuits that are each coupled in series with a corresponding internal current limiter circuit and the string of LEDs associated with the corresponding internal current limiter circuit. | 06-23-2011 |
20120074869 | Multimode controller for led light sources - A multimode controller for LED light sources, especially sources in warning lights, such as light bars, provides for a temporary increase in brightness from the LEDs by providing a burst mode, in addition to a flashing mode and a continuous mode. The modes are carried out by programming a microprocessor which receives signals from control switches, which may be pressed and released. The programming precludes the burst mode to continue for longer than a predetermined time, thereby ensuring that the power does not exceed the LEDs damage threshold characteristic. The controller thereby provides for temporary bursting to make visible the region in front of or around an emergency vehicle for a short period of time without the need for light sources dedicated solely to the high intensity brightness mode of operation of a warning light system. | 03-29-2012 |
20130241438 | DRIVING DEVICE, LIGHT-EMITTING DEVICE AND PROJECTOR - A driving device includes a power source that converts input power to output power, first and second capacitors connected to an output of the power source, a load selector, and a capacitor selector. The load selector opens/closes circuits of first and second loads connected to the output of the power source to alternately close these circuits such that the second-load circuit is closed after the opening of the first-load circuit. The capacitor selector opens/closes circuits of the first and second capacitors to alternately close these circuits such that the first-capacitor circuit is closed in synchronization with the closing of the first-load circuit, and such that the second-capacitor circuit is closed in synchronization with the closing of the second-load circuit. The capacitor selector opens the first-capacitor circuit after the opening of the first-load circuit. | 09-19-2013 |