Abstract: The present disclosure provides a method for detecting a display substrate and a device for detecting a display substrate. The method includes: exciting a threshold voltage of a driving transistor in each pixel driving circuit in the display substrate, so that the threshold voltage of the driving transistor with a shifted threshold voltage is further shifted; inputting a detection signal to each pixel driving circuit in the display substrate, where the detection signal is a signal enabling the pixel driving circuit to operate normally; and judging whether the display substrate is normal or not according to the voltage output by each pixel driving circuit.

Abstract: A mother substrate and a display panel including the mother substrate are disclosed. The mother substrate includes: an input pad located on an edge of the mother substrate; and a sub-substrate. A switch array and one or more signal lines connected to the switch array are arranged in a display area of the sub-substrate. One end of the signal line lead out a first test portion, and another end of the signal line is connected to the input pad and lead out a second test portion. The first test portion and the second test portion are located on different conductive layers and are insulated from each other. Partial orthographic overlapping of the first test portion is overlapped with partial orthographic overlapping of the second test portion in the non-display area.

Abstract: A weak light releasing layer includes a plurality of weak light releasing sections separated from each other by overlapping with corresponding one of the plurality of light releasing sections and a second inspection portion that is positioned relatively to the plurality of weak light releasing sections and overlaps with a first inspection portion. There are a first region and a second region that differ depending on whether or not there is an overlap with the second inspection portion inside an outer shape of the first inspection portion. The first region is sandwiched between any pair of portions of the second region in any of a plurality of directions orthogonal to each other.

Abstract: The present disclosure relates to the technical field of LED display screens, and in particular, to an LED display device and a method for driving the same. The driving method includes: generating a grayscale data in accordance with an image to be displayed; generating a control signal in accordance with the grayscale data, wherein the control signal includes a plurality of subframe signals each having a duration corresponding to a respective subframe display time; and controlling the corresponding LED lamps to be turned on or off by use of the subframe signals in each subframe of the frame cycle. The frame cycle includes reset time periods separating the successive subframes from each other. The order of the plurality of subframes in the frame cycle can be adjusted by use of the grayscale data.

Abstract: A driver integrated circuit, a display device including the driver integrated circuit, and a data correction method of the display device are disclosed. The driver integrated circuit includes a voltage generator generating a sensing data voltage, a calibration unit that decodes N-bit calibration data input from the voltage generator and generates at least one calibration voltage, where N is a positive integer, a sensor that samples a signal output from a pixel corresponding to the sensing data voltage in a sensing mode for sensing electrical characteristics of the pixel and samples the calibration voltage in a calibration mode for sensing output characteristics of an analog-to-digital converter, and the analog-to-digital converter converting an analog signal sampled by the sensor into a digital signal.

Abstract: The present disclosure provides a display device, including: a gate line and a data line; a pixel array; a gate driver, configured to provide a gate signal to the gate line; a test circuit, coupled to a first input line and a second input line respectively; and a data driver, including a first power line, a first transistor and a third input line, wherein the first power line is configured to supply an initial voltage to the pixel array, the first power line is coupled to the first input line via the first transistor, a gate of the first transistor is coupled to the third input line, the third input line is configured to transmit a pre-charge control signal, and the pixel array is configured to supply the initial voltage to each pixel in the pixel array based on the pre-charge control signal.

Abstract: A display panel is disclosed. In one aspect, the display panel includes a display unit including a plurality of pixels, an inspection circuit configured to apply a first inspection voltage to the display unit based on a first control signal, a pad portion electrically connected to the inspection circuit and configured to supply the first inspection voltage and the first control signal to the inspection circuit, and at least one external inspection line electrically connected between the inspection circuit and the pad portion. The external inspection line includes a plurality of transistors.

Abstract: A computed tomography (CT) imaging apparatus includes a radiation source configured to emit X-rays; a plurality of photon-counting detectors configured to detect X-rays emitted by the radiation source and generate a photon counting signal based on the detected X-rays; and processing circuitry to obtain a kV-waveform used by the radiation source to generate the X-rays during a scan of an object, and adjust at least one energy threshold dividing the photon counting signal into a plurality of spectra bins in accordance with the obtained kV-waveform.

Abstract: A vehicle lamp system 1 includes a plurality of light source units 22R and 22L and a controller 14 which controls the plurality of light source units 22R and 22L. The controller 14 sequentially turns on the plurality of light source units 22R and 22L when signals for operating a vehicle 10 are input. Thereby, it is possible to call attention to surrounding vehicles or pedestrians when starting the vehicle 10. The vehicle lamp system 1 can call attention to surrounding vehicles or pedestrians when starting a host vehicle.

Abstract: 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 string lighting assemblies set up in series. The invention creates a circuit that determines whether there is a damaged bulb in holiday or occasion lighting assemblies by employing use of a power source, such as for example, a 9-volt battery, two wire leads and two terminals that create an electrical circuit when the terminals are attached to the lighting assembly wiring by means of the terminals. When the test kit is attached and the bulbs fail to illuminate, a user is thereby informed that a bulb within that series is damaged or otherwise non-functional. By further narrowing the number of bulbs tested, the kit allows the user to identify the damaged bulb and replace the bulb quickly and easily.

Abstract: 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 example, the tester includes a lamp testing function in which a high voltage test signal is generated and transmitted using an antenna. When the test signal is in proximity to a gas filled lamp, the voltage is of sufficient magnitude to ionize the gas inside the lamp, causing the lamp to illuminate. The tester also includes a ballast testing function in which the power lines or wires connecting a ballast to a lamp or lighting fixture are tested, and a filament tester for testing the filaments in a lamp for continuity or resistance. The tester also includes a worklight for illuminating an area under test and one or more display devices (e.g., LEDs, an LCD display, or the like) which provide an indication of, for example, a test being performed or a result of a test.

Abstract: A display apparatus includes a display panel, a light source part, a light source driving part and a used time calculation part. The light source part includes a light source providing the display panel with lights. The light source driving part includes a boost part outputting a light source driving voltage and a light source driving chip controlling the boost part. The used time calculation part detects an initial drive time during which an initial driving voltage is supplied to the light source driving chip and a normal drive time during which a normal driving voltage is supplied to the light source driving chip, and calculates a used time of the light source by using the initial drive time and the normal drive time. Thus, a real used time of a light source may be provided to correctly estimate lifetime of a light source.

Abstract: A light bulb storage and testing assembly incorporating a flexible sheet having upper and lower ends, and having front and rear sides; a support frame having upper and lower ends, and having front and rear sides, the flexible sheet's upper end being fixedly attached to the support frame's lower end; a hanger fixedly attached to the support frame's upper end; first and second pluralities of light bulb receptacles respectively fixedly attached to the flexible sheet's front and rear sides; an electronic bulb tester; and mounting brackets adapted for alternatively positioning the electronic bulb tester on either side of the support frame.

Abstract: Various embodiments provide a method for ascertaining a type of a gas discharge lamp using an electronic ballast for operating different types of gas discharge lamps, wherein the different types of gas discharge lamps differ in at least one operating parameter, wherein the method may include: a) preheating at least one filament in the gas discharge lamp for a predetermined preheating time; b) measuring a physical variable which is characteristic for the type of the gas discharge lamp at the end of the preheating time and providing the measurement value of said variable; and c) ascertaining the lamp type on the basis of the measurement value which is provided, wherein the preheating time is increased by a predetermined time period and the b) and c) are repeated if the lamp type in c) cannot be ascertained uniquely. Moreover, various embodiments provide an electronic ballast for operating at least two different types of gas discharge lamps which have at least one different operating parameter.

Abstract: An adjustable spectrum LED solar simulator method and system which provides power to LEDs, senses the LED output, compares the LED output to a predetermined norm, and adjusts the LED outputs accordingly. An adjustable spectrum LED solar simulator system includes a multiplicity of LEDs of a number of different color wavelength ranges, an LED driver system for providing power to the LEDs, a sensor system for sensing the output of the LEDs and a controller responsive to the sensor system for comparing the color spectrum of the output of the LEDs to a desired solar spectrum and enables the driver system to adjust the power to the LEDs to more closely match the desired solar spectrum. The solar simulator system may include a modulator structure of hierarchical assemblies. Solar simulator calibration is also disclosed.

Abstract: Embodiments of the invention provide a test method and a test apparatus for a transparent display device. The test apparatus for the transparent display device comprises: an optical measuring device disposed on one side of the transparent display device to be tested, and a reference object disposed on the other side of the transparent display device to be tested. A brightness of the transparent display device to be tested is adjustable, and the optical measuring device measures a display effect of the reference object through the transparent display device to be tested which is set to different brightness.

Abstract: The present invention relates to an electronic paper panel, an electronic shelf label system and a method for driving the same. The electronic paper panel includes a substrate formed thereon a wiring pattern and a damage sensing pattern, an insulating layer formed on the wiring pattern, a segment electrode formed on the insulating layer and electrically connected to the wiring pattern and a driving chip mounted on the substrate.

Abstract: A system for detecting inductive objects includes an inductive sensor circuit for detecting changes in an electromagnetic field (“EMF”) environment and an integrated circuit (“IC”) device. The inductive sensor circuit generates an oscillating analog waveform with an envelope that indicates changes in the EMF environment. The oscillating waveform is coupled to the digital input pin of the IC. A digital interface circuit in the IC is coupled to the digital input pin and is configured for detecting if the oscillating waveform exceeds high and low threshold voltage levels. The detecting results in a digital pulse which represents changes in the EMF environment. In another implementation, a timer input capture pin can be used to detect the waveform envelope decay by storing the time when the waveform crosses a threshold value during a time period. A reduced capture time after the time period expires indicates a change in the EMF environment.

Abstract: A mother substrate including a plurality of organic light emitting display panels that include pixel circuits having a simple structure, is designed so that a sheet unit test may be performed while preventing or reducing brightness variation during sheet unit test, and a sheet unit test method for the mother substrate. The mother substrate also includes first and second wiring line groups and a compensating unit. The compensating unit is coupled to a coupling line for coupling a wiring line from among the first and second wiring line groups for transmitting a sheet unit test signal to the panels. The compensating unit is also for subtracting a voltage corresponding to a threshold voltage of a driving transistor included in a pixel of the panels from the sheet unit test signal before transmitting the sheet unit test signal to the panels.

Abstract: A method of testing an electric discharge stun device includes the steps of identifying a stun device to be tested and absorbing a discharge from the stun device into a tester. The discharge is characterized by a discharge characteristic that is then compared automatically to information such as (a) a previous corresponding characteristic associated with a previous discharge of the stun device or (b) a corresponding characteristic associated with a prior discharge of at least one other stun device. The characteristic can be a waveform, a peak voltage, duration, current, joule, and temperature.

Abstract: A liquid crystal display is capable of detecting a failure of a gate driver, and a method of testing the same are provided. The liquid crystal display includes a liquid crystal display panel on which liquid crystal cells connected to thin film transistors (TFTs) located at crossings between gate lines and data lines are formed, a data driver that drives the data lines of the liquid crystal display panel, and a gate driver which includes first to nth stages (n is a natural number larger than 1) formed on the liquid crystal display panel that generates normal scan signals for turning on the TFTs in a normal mode, and that generates test scan signals for turning off the TFTs in a test mode.

Abstract: A device for detecting a fault of at least one street lamp of a plurality of street lamps which are connectable in common to an AC power supply is proposed. The proposed device allows detecting whether a fault has occurred based on obtaining measures representative of the total active and reactive power supplied by the AC power supply to the plurality of street lamps, and detecting variations in these measures. Optionally, also the type of fault can be determined based on detected variations in the power measures.

Abstract: In a color sensor unit for use in a display device, a color measuring device for use in a display device, a display system and a display calibration method of the invention, a CPU is operable to calculate a luminance value or a chromaticity value substantially equivalent to that to be obtained by a measuring device having a light receiving angle smaller than a light receiving angle of a sensor, by correcting a luminance value or a chromaticity value measured by the sensor based on gradation information from the display device.

Abstract: A method of testing an electric discharge stun device includes the steps of identifying a stun device to be tested and absorbing a discharge from the stun device into a tester. The discharge is characterized by a discharge characteristic that is then compared automatically to information such as (a) a previous corresponding characteristic associated with a previous discharge of the stun device or (b) a corresponding characteristic associated with a prior discharge of at least one other stun device. The characteristic can be a waveform, a peak voltage, duration, current, joule, and temperature.

Abstract: A method of testing an electric discharge stun device includes the steps of identifying a stun device to be tested and absorbing a discharge from the stun device into a tester. The discharge is characterized by a discharge characteristic that is then compared automatically to information such as (a) a previous corresponding characteristic associated with a previous discharge of the stun device or (b) a corresponding characteristic associated with a prior discharge of at least one other stun device. The characteristic can be a waveform, a peak voltage, duration, current, joule, and temperature.

Abstract: This disclosure provides systems, methods and apparatus for calibrating display arrays. A leakage compensation circuit is provided in conjunction with a circuit for sensing display element states. The leakage compensation circuit may include a leakage current integrator and a voltage to current converter.

Abstract: A circuit for monitoring the functionality of an electrical element. A primary power supply provides direct current to the electrical element at a current sufficient for the electrical element to operate. A Schottky diode is disposed between the primary power supply and the electrical element, wherein the electrical element draws its operational current through the Schottky diode when in operation. A reverse bias power supply is provided. An opto-isolator is disposed between the reverse bias power supply and the electrical element. The electrical element draws a secondary current from the reverse bias power supply through the opto-isolator. The opto-isolator creates an output signal that is indicative of the secondary current. The output signal is used to control a remote failure indicator. When the electrical element fails, the current flowing through the opto-isolator stops. This triggers the failure indicator and informs a user as to the failed status.

Abstract: An arc discharge detection device is used for detecting arc discharges in a plasma process. The arc discharge detection device includes a comparator configured to emit an arc discharge detection signal and receive an instantaneous value of the signal or a signal proportional thereto, a minimum or maximum value detection device configured to receive the signal and to determine a minimum or maximum value of the signal within a predetermined time period, a setting means configured to receive the minimum or maximum value and to generate a reference signal from the minimum or maximum value, such that the reference signal is supplied to the comparator, and such that the comparator changes the signal level of the arc discharge detection signal when the comparator detects that the instantaneous value has reached the reference signal.

Abstract: Apparatus and methods for testing a light fixture power circuit are therefore provided. The light fixture power circuit may energize a fluorescent lamp by providing power at first and second power terminals. The lamp holder may include a lamp pin guide for guiding the tube's contact pins toward the first and second power terminals. The apparatus may have probes that simulate the tube's contact pins. The probes may be robotically inserted into the lamp holder in a manner that is similar to the manner in which the contact pins would be inserted. This may eliminate the requirement to use fluorescent tubes to test the light fixture power circuit. The apparatus may include circuitry for testing the impedance of the light fixture power circuit at the first and second power contacts.

Abstract: When a light-emitting element emits light for a long time, characteristics thereof change and current flowing therethrough is reduced even in the same voltage is applied. In particular, in a case of a display device with light-emitting element, there is a problem such that burn-in is generated in a display screen. A burn-in correction period in which characteristics of a light-emitting element in each pixel are detected is provided in addition to a normal driving period in which an image is displayed. The light-emitting element can emit light which compensates the changes in the characteristics, by correcting video signals inputted to each pixel in the normal driving period according to the characteristics of the light-emitting elements obtained in the burn-in correction period.

Abstract: Control of delivery of current through one or more discharge lamps. Methods include alternately switching on and off switching elements that control a fluorescent lamp, in response to receiving input, until the brightness of the lamp decreases to a threshold. Further, methods include providing control signals at complementary duty cycles to further decrease the brightness and alternating the duty cycles of the signals applied to the filaments of the fluorescent lamp.

Abstract: A display apparatus includes a display panel, a light source part, a light source driving part and a used time calculation part. The light source part includes a light source providing the display panel with lights. The light source driving part includes a boost part outputting a light source driving voltage and a light source driving chip controlling the boost part. The used time calculation part detects an initial drive time during which an initial driving voltage is supplied to the light source driving chip and a normal drive time during which a normal driving voltage is supplied to the light source driving chip, and calculates a used time of the light source by using the initial drive time and the normal drive time. Thus, a real used time of a light source may be provided to correctly estimate lifetime of a light source.

Abstract: A one-sheet test device for testing panels on a one-sheet substrate and a test method thereof, wherein the test device and method are capable of performing a one-sheet test regardless of the number of panels formed on the one-sheet substrate. The one-sheet test device includes a signal supplier and a connection board. The signal supplier is for generating a plurality of signal groups and a plurality of dummy signals for testing the panels. The connection board is for transmitting a first signal group of the signal groups to a first panel of the panels corresponding to the first signal group, and for transmitting a signal of at least one signal group of the plurality of signal groups to at least two of the panels when the number of panels is larger than the number signal groups. The one-sheet test device may include a connection controller for controlling the connection board.

Abstract: A mother substrate including a plurality of organic light emitting display panels that include pixel circuits having a simple structure, is designed so that a sheet unit test may be performed while preventing or reducing brightness variation during sheet unit test, and a sheet unit test method for the mother substrate. The mother substrate also includes first and second wiring line groups and a compensating unit. The compensating unit is coupled to a coupling line for coupling a wiring line from among the first and second wiring line groups for transmitting a sheet unit test signal to the panels. The compensating unit is also for subtracting a voltage corresponding to a threshold voltage of a driving transistor included in a pixel of the panels from the sheet unit test signal before transmitting the sheet unit test signal to the panels.

Abstract: A testing device (1) for a lamp (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) to the lamp (3), wherein a coupled test voltage (Vpa) corresponds to the nominal voltage (Vn), and a coupled test frequency (fpa) corresponds to the nominal frequency (fn). The testing device is capable of testing a gas-filled lamp having integrated upstream electronics between power supply connections and a gas filled portion.

Abstract: A test system includes a front bezel of an electronic device and a test device. The front bezel includes a plurality of positions defined in the front bezel, a plurality of light emitting diodes (LEDs) located in the plurality of positions, and a female LED connector connected to the plurality of LEDs. The test device includes a male LED connector electrically connected to the female LED connector, and a programmable logic device (PLD) electrically connected to the male LED connector, and configured to control the LEDs to emit light in a sequence to determine if the plurality of LEDs are correctly located in the correct plurality of positions.

Abstract: A method and system of remotely monitoring an operational status of electronic discharge devices in an air purification system senses emitted radiation at a location proximate the air purification system, alone or in combination with a determination of an amount of time remaining in an operational lifetime of the electronic discharge device, or an amount of power delivered to at least one of the electronic discharge devices. A determination of the operational status of at least one of the electronic discharge devices is made based on at least emitted radiation, and the status information is transmitted to a remote monitoring unit that receives the status information and displays an indicator of operational status. In one embodiment, the operational status of a UV-C germicidal lamp may be monitored using optically sensitive devices located within a purification system.

Abstract: Disclosed herein is a replacement light for a fluorescent tube usable in a fluorescent fixture connected to a power source and containing at least one LED, the improvement including a detection circuit for connection to the power source, the detection circuit configured to identify the power source.

Abstract: An identification system for a light radiation source (103) having a control circuit (107) for communicating with an identification circuit (108) associated with the light radiation source, wherein the identification circuit is arranged for storing data relating to the light radiation source. During operation, the control circuit communicates with the identification circuit via a signal path comprising at least a portion of a first electric wire (112) provided for energizing the light radiation source such that it is used as a first transmitting antenna for communicating with the identification circuit. The operation of the light radiation source is controlled in dependence on the data retrieved from the identification circuit. Depending on the result of the identification, operation of the light radiation source can be authorized or prevented, thus blocking the use of an incorrect radiation source for a given application.

Abstract: An LED-based light tube for use in a conventional fluorescent fixture can feature a housing including a light transmitting portion. At least one electrical connector can be attached to the housing and configured for engagement with the conventional fluorescent fixture. At least one LED can be arranged to produce light in a direction toward the light transmitting portion. A sensor can be operable to detect a brightness level and output a corresponding signal. A controller can be in electrical communication with the at least one electrical connector and operable to control the at least one LED in response to the signal.

Abstract: An image display device accurately evaluates the possibility of problems occurring due to the state of impure gas inside a discharge envelope in a high pressure discharge lamp. The image display device includes the high voltage discharge lamp and an evaluation unit (51) for evaluating the possibility of problems occurring due to the state of impure gas. The evaluation unit (51) includes a high voltage pulse generator (57) that generates a high voltage pulse for breaking insulation in the high pressure lamp, a constant current generator (58) that generates a constant current for illuminating the high pressure discharge lamp in a glow discharge state, a lamp voltage measurer (59) that measures lamp voltage during illumination in the glow discharge state, an LED (63), and a controller (65).

Abstract: A device for measuring the current of a discharge lamp, includes a first current measuring device, which converts the current flowing through the lamp into a signal; a second current measuring device, through which a current flows which has the same amplitude response and phase response as the displacement current which flows through the first current measuring device; wherein the signals of the first current measuring device and the second current measuring device are interconnected in such a way that the content of the displacement current in the resultant signal vanishes.

Abstract: A diagnostic tool for an x-ray imaging system includes a first test device configured to simulate a first load condition of an x-ray tube, and a first connector electrically coupled to the first test device and configured to couple the first test device to a high-voltage generator in the x-ray imaging system.

Abstract: An optimized light source and a method of manufacturing the same. The light source is made up of an array of individual lighting elements and is optimized for electrical, optical and economic performance, as well as a method for configuring such an array. The a process for selecting individual lighting elements is based on characterizing and sorting individual lighting elements based on performance so that the performance of the overall array is improved by combing individual lighting elements whose individual performance might not otherwise meet the performance of the overall array.

Abstract: To provide a solar simulator which has a plurality of xenon arc lamps as a light source, in which a predetermined amount of light is stably obtained from each of the xenon arc lamps so that constant irradiance over a test plane is ensured. The solar simulator comprises a plurality of xenon arc lamps; a plurality of light amount sensors provided one for each of the xenon arc lamps; and a plurality of control circuits provided one for each of the xenon arc lamps, for controlling a current flowing through, or a voltage applied to, each of the xenon arc lamps, wherein a detection signal output from each of the light amount sensors is fed back to each of the control circuits to control the relevant control circuit, to thereby control the amount of light emitted from each of the xenon arc lamps.

Abstract: For determining a wave running time between a RF source in a plasma power supply device and a load connected to the plasma power supply device, an RF pulse is transmitted forwards from the RF source to the load. The pulses are reflected by the load and transmitted backwards to the power source. A return time measured on arrival of the pulse(s) at the inverter is used to determine a wave running time.

Abstract: To detect arc discharges occurring in a plasma, a parameter of the plasma process is determined, and after a first period of time following the detection of an arc discharge the parameter is again determined. In the event that after the first period of time no arc discharge is detected, a first arc suppression countermeasure for suppression of arc discharges is executed.

Abstract: An organic light emitting display device may include a pixel portion including a plurality of pixels, which are coupled to scan lines and data lines, a scan driver adapted to provide scan signals to the scan lines, a first transistor group adapted to test the plurality of pixels, the first transistor group being directly connected to first ends of the data lines, a second transistor group adapted to test the plurality of pixels, the second transistor group being connected to second ends of the data lines, a data distributor coupled between the second ends of the data lines and the second transistor group, a first wire group extending in a first direction at an outer area of the light emitting display device, and a second wire group extending in a second direction at the outer area of the light emitting display device.

Abstract: Pixel current flowing in each pixel of a display panel is efficiently measured. The display panel 20 includes pixels arranged in a matrix, and performs display by writing pixel data in these pixels. By turning on one pixel alone within a screen for a period of a limited number of lines within one frame, a plurality of pixels are sequentially turned on within one frame. By measuring the current used for performing display within the period during which one pixel alone is turned on, pixel current that flows in that pixel is measured.

Abstract: A circuit for providing electrical current to an electrically operated bicycle device comprises a current supply circuit that supplies DC current from the power supply to the bicycle device along a current path and a current limiting circuit that includes an active resistance circuit that limits electrical current flowing through the current supply circuit when voltage applied to the current limiting circuit is above a minimum value.