Matches 1 - 50 out of 182 1 2 3 4 >


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US20110241691 TESTING DEVICE AND TESTING METHOD EMPLOYING THE SAME  
An exemplary testing device for testing quality of indicator lights includes a light intensity tester and a control unit electrically connected to the light intensity tester. The light intensity...
US20150102814 Lighting Maintenance, Testing and Repair Kit and Method of Use Thereof  
The present invention is directed, in part, to an apparatus and methods thereof that effectively allow the testing, detection and identification of non-functioning light bulbs used in typical...
US20110169494 Method for the Operation of Illuminants  
The invention relates to the operation of illuminants, in particular OLEDs. The invention relates to a method and a measuring instrument for determining the electrical properties of an OLED, the...
US20140009161 TEST MACHINE AND THE TEST METHOD FOR LIGHT EMITTING DIODE BACKLIGHT DRIVER, AND, MANUFACTURING METHOD FOR MONITOR POWER BOARD  
A test machine and a test method for a Light Emitting Diode (LED) backlight driver and a manufacturing method for a monitor power board are disclosed. A switch-controlled LED-light-bar load is...
US20120007602 LIGHTING TESTER  
A combination lighting tester tool. The combination lighting tester tool includes at least three independent testing tools for identifying and diagnosing a problem in a lighting system. For...
US20150054515 PRINTED CIRCUIT BOARD ASSEMBLY AND DISPLAY DEVICE HAVING THE SAME  
A printed circuit board assembly includes a printed circuit board, a connector mounted on the printed circuit board and including at least one terminal electrically connected to an external...
US20130207662 METHOD FOR TESTING LED LIGHT BAR  
A method for testing LED light bar includes steps: providing a jig with a pair of aligning plates, and a testing device with an electrical clamp and a sensor; adjusting alignment of LEDs via the...
US20140368204 TECHNIQUES FOR ASSESSING CONDITION OF LEDS AND POWER SUPPLY  
Techniques are disclosed for assessing the conditions of LEDs and power supplies of solid state lighting systems. The techniques can be used, for example, to measure the capacitance of an output...
US20120074947 Failure Detection for Series of Electrical Loads  
A device can be used for detecting failures in an illumination device having a plurality of light emitting diodes connected in series. A first circuit node, a second circuit node, and a third...
US20150137709 BACKLIGHT MODULE AND METHOD FOR DETECTING ELECTROSTATIC DAMAGE THEREOF  
A backlight module is disclosed. The backlight module comprises a circuit board, at least one light source disposed on the circuit board, and a positive probe-point and a negative probe-point,...
US20140266217 METHOD AND SYSTEM FOR DETECTING LED SHORT CIRCUIT IN LED STRINGS OR DETECTING MATCHING AMONG LED STRINGS  
This specification relates to a method and a system for detecting light emitting diode (LED) short circuit in a plurality of LED strings or detecting matching among the plurality of LED strings,...
US20140097849 METHOD OF DETECTING A LED FAILURE, A CONTROLLER THEREFOR, A LIGHTING UNIT AND LIGHTING SYSTEM  
Disclosed herein is a method of detecting an LED failure in a series-connected string of LEDs using a parameter indicative of a voltage difference between a voltage across the string at a...
US20110316543 METHOD AND CIRCUITS FOR SHORT-CIRCUIT PROTECTION OF LED SYSTEMS  
An embodiment of the present invention relates to a method for detection of short circuit conditions in an LED array having one or more LED strings, each of which includes one or more LED devices....
US20120217969 LED PROBE  
A probe includes a main body and a sensor circuit board. The main body includes a through hole capable of accommodating an LED under test and an accommodation space capable of accommodating the...
US20100327872 Devices And Methods For LED Life Test  
A life test device comprises an oven, a current source, a voltage meter, a control module, and a process module. A light-emitting diode (LED) is disposed in the oven. The temperature of the oven...
US20110279058 MODULE TO CONTROL THE SUPPLY TO LED ASSEMBLIES  
A device for measurement of characteristic parameters of at least one assembly of at least one light emitting diode (LED) comprising a measurement circuit for each assembly, wherein the...
US20110084701 TESTING OF LEDS  
A method of determining the ageing characteristics of an LED comprises applying a current stress pulse to the LED. The LED is monitored to determine when the thermal heating induced by the current...
US20080204029 LED CHAIN FAILURE DETECTION  
The system consists of an LED failure detection circuit to provide protection against individual LED catastrophic failure. When LED clusters are arranged in a series-parallel configuration, it is...
US20140320136 METHOD OF TESTING ORGANIC LIGHT-EMITTING DISPLAY PANEL, MOTHER SUBSTRATE TESTING APPARATUS, AND METHOD OF TESTING MOTHER SUBSTRATE  
A method of testing an organic light-emitting display panel, a mother substrate testing apparatus, and a method of testing a mother substrate are provided. The method of testing an organic...
US20110254554 LED-BASED ILLUMINATION MODULE ON-BOARD DIAGNOSTICS  
A light emitting diode (LED) based illumination module performs on-board diagnostics. For example, diagnostics may include estimating elapsed lifetime, degradation of phosphor, thermal failure,...
US20150015076 CHARGING SYSTEM AND POWER FAILURE DEVICE DETECTING POWER FAILURE OF LED LIGHT  
In an emergency lighting apparatus, charging efficiency is increased by individually charging cells in a power storage unit. When a power failure or other situation occurs requiring the actual use...
US20110084613 END-OF-LIFE PROTECTION CIRCUIT AND METHOD FOR HIGH INTENSITY DISCHARGE LAMP BALLAST  
An apparatus and method thereof for igniting and operating a high intensity discharge (HID) lamp during an in service life, and powering down the lamp when an end-of-life (EOL) lamp condition is...
US20140125343 INSTRUMENT FOR MEASURING LED LIGHT SOURCE  
A LED light source measuring instrument includes a shell portion and a test portion. The shell portion supports the test portion. The test portion includes an electrode seat, the electrode seat...
US20140084811 Methods and Systems for Controlling LEDs  
The present invention relates to an electronic device, the electronic device comprising at least one LED, a driving unit for applying a driving algorithm for driving the LED during normal...
US20110121747 END-OF-LIFE PROTECTION CIRCUIT AND METHOD FOR HIGH INTENSITY DISCHARGE LAMP BALLAST  
An apparatus and method for detecting an end of life (EOL) condition of a lamp that exhibits a re-ignition behavior. A voltage is applied to the lamp to cause the lamp to start emitting light, and...
US20120206146 TECHNIQUE FOR IDENTIFYING AT LEAST ONE FAULTY LIGHT EMITTING DIODE IN A STRING OF LIGHT EMITTING DIODES  
A method includes receiving a first voltage from an intermediate node in a string of multiple light emitting diodes (LEDs). The method also includes receiving at least one second voltage based on...
US20130141322 EFFICIENT BACKLIGHT SHORT CIRCUIT PROTECTION  
Systems, methods, and devices are provided for detecting short circuits in a backlight assembly without a resistor-based current sensor. For example, an electronic display according to the present...
US20110148422 Lamp With Metering Device  
A generator generates electricity by non-combustion means. A battery stores the generated electricity. An electrical appliance is powered by the stored electricity. A metering device tallies an...
US20140375323 NEST FOR TESTING ELECTRICAL COMPONENTS  
A nest (1) comprising, a fix part (3), and a movable part (5), wherein the fix (part 3) and movable part (5) are configured to cooperate so as to define a (pocket 7) which can receive at least a...
US20120200296 TECHNIQUE FOR IDENTIFYING AT LEAST ONE FAULTY LIGHT EMITTING DIODE IN MULTIPLE STRINGS OF LIGHT EMITTING DIODES  
A method includes receiving a first voltage from a first node associated with a first string of multiple light emitting diodes (LEDs). The method also includes receiving a second voltage from a...
US20120043903 Method of Measuring a Resonant Frequency in an Electronic Dimming Ballast  
An electronic ballast for driving a gas discharge lamp comprises an inverter circuit, a resonant tank circuit, and a control circuit operable to determine an approximation of a resonant frequency...
US20140304961 LED LIGHT STRING DIAGNOSTIC AND REPAIR SYSTEM  
According to one embodiment, a diagnostic device (8) for identifying a defect in an LED light string includes a probe (18) and a polarity selector switch (16). The LED light string includes a...
US20110133742 LAMP FAILURE DETECTOR  
An apparatus and method for detecting lamp failure is described for an array of lamps used in a rapid thermal processing system. The lamp failure detection system enables identification of a...
US20150160305 METHOD OF TESTING A DIMMING LIGHTING SYSTEM  
A diagnostic device for testing a lighting fixture apparatus is provided. The lighting fixture includes at least one ballast configured to receive a dimming test signal. The diagnostic device...
US20110095867 REMOTE MONITORING AND CONTROL OF LED BASED STREET LIGHTS  
The present invention is directed to a method for remotely collecting metering information via a light emitting diode (LED) based street light. In one embodiment, the method includes collecting...
US20120181931 LED SHORT-CIRCUIT DETECTION CIRCUIT, LED DRIVE DEVICE, LED LIGHTING DEVICE, AND VEHICLE  
An LED short-circuit detection circuit produces an LED short-circuit detection signal by monitoring an LEDC terminal voltage (a first voltage obtained at a chip-to-chip node in a row of LED chips,...
US20120182018 APPARATUS AND METHOD FOR SENSING FAILURE  
Provided is an apparatus for sensing a failure that may apply, using a current control unit, a current to at least one first light emitting diode (LED) string and at least one second LED string...
US20150247892 METHOD FOR THE CHARACTERIZATION AND MONITORING OF INTEGRATED CIRCUITS  
A method for characterizing an integrated circuit that includes ramping the supply voltage to an integrated circuit as a function of time for each of the transistors in the integrated circuit, and...
US20120092017 ORGANIC ELECTROLUMINESCENCE DEVICE AND TESTING METHOD THEREOF  
An organic electroluminescence device is provided, which comprises: a lighting region, a wiring region, a bonding region and a wiring extending region (300), the lighting region comprises an...
US20120068714 Short Detection Circuit, Light-Emitting Diode Chip, Light-Emitting Diode Device and Short Detection Method  
A short detection circuit includes a voltage divider circuit, for generating, according to a bottom voltage of one or more light-emitting diode strings, a divided voltage less than the bottom...
US20130127362 EMERGENCY LIGHTING SYSTEMS AND METHODS FOR SOLID STATE LIGHTING APPARATUS  
An emergency lighting module for providing emergency power to a solid state luminaire. The emergency lighting module includes a first input configured to receive a DC input voltage from the solid...
US20150108986 CLOSED LOOP DYNAMIC CAPACITANCE MEASUREMENT  
This disclosure provides systems, methods and apparatus for measuring capacitance of a display unit, such as an interferometric modulator (IMOD). In one example, a circuit may include an...
US20110128004 APPARATUS FOR INSPECTING LIGHT EMITTING DIODE PACKAGE AND INSPECTING METHOD USING THE SAME  
An apparatus for inspecting a light emitting diode (LED) package is provided to inspect an LED to determine whether or not it is defective, and discard the LED when the LED is defective. The...
US20120306502 Circuit for Controlling Current to Light-Emitting Diode (LED)  
The present invention discloses a current controlling circuit wherein the circuit (200) comprises a DC power source (202), an inductor (204), a N-channel Metal Oxide Semiconductor (NMOS) (206),...
US20090001990 DETECTOR FOR AN ULTRAVIOLET LAMP SYSTEM AND A CORRESPONDING METHOD FOR MONITORING MICROWAVE ENERGY  
A detector for an ultraviolet lamp system of the type having a microwave generator includes a first circuit that is configured to detect the microwave energy generated from the microwave...
US20140062491 SUPERVISION FOR A LIGHT DISPLAY DEVICE  
A device and method may include, in a display device, emitting visible light in a humanly imperceptible manner and sensing said light to verify operation of the display device.
US20150084637 ASSEMBLY AND METHOD FOR EVALUATING THE STATE OF AN ELECTRONIC UNIT USED FOR ILLUMINATION PURPOSES  
An assembly for evaluating the state of an electronic unit used for illumination purposes which is designed to detect a plurality of physical parameters that represent the current state of the...
US20080315885 Testing device for lighting means  
A testing device (1) for lighting means (3) operated at a nominal voltage (Vn) and at a nominal frequency (fn), having a capacitive coupling of a test voltage (Vp) at a testing frequency of (fp)...
US20130229185 TRAILER LIGHT TESTER  
The present invention is a trailer light tester that includes a 7-way plug that is inserted into and connected to a trailer to check a plurality of various trailer lights of the trailer, an...
US20150160275 SYSTEM AND METHOD FOR MONITORING POWER CONSUMPTION OF AN LED LAMP  
A system is provided for monitoring power consumption of a light emitting diode (LED) lamp. The system includes a first sensor, a second sensor and a processor. The first sensor is associated with...

Matches 1 - 50 out of 182 1 2 3 4 >