Abstract: An apparatus for error compensation of a self calibrating current source adapted for compensating errors of at least one self calibrating current source. The compensation apparatus includes an imitative self calibrating current source, a current source reference apparatus and an error compensation apparatus. The imitative self calibrating current source is used to simulate the structure of the self calibrating current source to generate an error bias signal as the error of the self calibrating current source. The current source reference apparatus is used to generate an ideal bias signal. The error compensation apparatus generates a compensation bias signal to compensate errors of the self calibrating current source according to the difference of the error bias signal and the ideal bias signal.

Abstract: A sigma delta analog-to-digital converter (ADC) to convert an analog converter input signal to a digital converter output signal. Multiple integrator stages, including at least a first and a final one, each receive an analog input signal and an analog feedback signal and output an integrated signal. The integrator stages are serially ordered to receive the converter input signal and then preceding of the integrated signals. A quantizer receives the integrated signal of the final or multiple integrator stages and provides the converter output signal. A feedback system also receives the converter output signal and provides the respective analog feedback signals to at least one of the integrator stages. The feedback system particularly includes resisters arrayed so that at least one is in the paths of all of the analog feedback signals and others are only in the paths of each individual analog feedback signal.

Abstract: A sigma-delta modulator is disclosed. The sigma-delta modulator includes a first integrator, a second integrator, an analog-to-digital converter, a digital-to-analog converter (DAC), and a compensating device. The first integrator receives an input signal for generating a first output signal. The second integrator receives the first output signal for generating a second output signal. The ADC converts the second output signal into a digital modulation signal. The DAC converts the digital modulation signal into an analog feedback signal. The analog feedback signal is transmitted to the first integrator and the second integrator. The compensating device is for compensating the analog feedback signal for a time delay caused by a feedback loop from the ADC through the DAC to the first integrator.

Abstract: A regulator for a digital-to-analog converter having in input a digital signal and suitable for providing an analog signal in output, the regulator including at least one pair of buffers having in input the digital signal and the outputs connected to a pair of circuit branches connected to the output of the regulator; each of the at least two circuit branches having at least one resistance. To at least one of the at least one pair of buffers a variable resistance is associated, and the regulator includes a circuit having in input the analog signal and adapted for measuring its waveform and acting on the variable resistance in response to its possible anomalous waveform compared to a desired waveform.

Abstract: A switch assembly is provided for use on a vehicle having a source of supply voltage. The assembly comprises a switching network having an input terminal configured to be coupled to the supply voltage and an output terminal. The network comprises: (1) nine series-coupled resistors coupled between the input terminal and the output terminal, each resistor having a substantially predetermined resistance; and (2) nine switches each coupled between the input terminal and the output terminal and capable of being opened and closed by an operator of the vehicle. Eight of the switches are each coupled to a different junction of adjacent resistors, and the ninth switch is coupled between the output terminal and the ninth resistor. The switch assembly further comprises a control module coupled to the output terminal for determining which, if any, of the nine switches is closed.

Abstract: A variable resolution analog-to-digital converter includes a sample-and-hold circuit including a plurality of sample-and-hold units which are connected in parallel and selectively activated corresponding to a required resolution to sample and hold an analog input signal, a plurality of conversion stages connected in cascade to an output of the sample-and-hold circuit to convert an output signal of the sample-and-hold circuit to a plurality of bit signals, and a synthesis circuit to synthesize the bit signals, to generate a digital output signal.

Abstract: A method of aligning a passenger boarding bridge to a doorway of an aircraft comprises initiating an automated alignment process for aligning the aircraft-engaging end of the passenger boarding bridge to the doorway. An input signal is received from a user aboard the aircraft, which is indicative of an emergency stop request. A control signal relating to the input signal is transmitted using a transmitter that is disposed aboard the aircraft. The control signal is received at a location that is remote from the aircraft, and the control signal subsequently is provided to a bridge controller of the passenger boarding bridge. The automated alignment process currently in progress is stopped in response to receiving the control signal at the bridge controller.

Abstract: A collision sense and avoidance system and method and an aircraft, such as an Unmanned Air Vehicle (UAV) and/or Remotely Piloted Vehicle (RPV), including the collision sense and avoidance system. The collision sense and avoidance system includes an image interrogator identifies potential collision threats to the aircraft and provides maneuvers to avoid any identified threat. Motion sensors (e.g., imaging and/or infrared sensors) provide image frames of the surroundings to a clutter suppression and target detection unit that detects local targets moving in the frames. A Line Of Sight (LOS), multi-target tracking unit, tracks detected local targets and maintains a track history in LOS coordinates for each detected local target. A threat assessment unit determines whether any tracked local target poses a collision threat. An avoidance maneuver unit provides flight control and guidance with a maneuver to avoid any identified said collision threat.

Abstract: A microwave frequency converter for a radar receiver is provided in which a frequency of a local oscillator of the microwave frequency converter can be prevented from interfering with an oscillation frequency of a magnetron included in the radar receiver and which can receive a signal from a considerably short distance. A voltage of an RF amplifier connected to the microwave frequency converter is synchronized with an oscillation output of the magnetron. The gate and drain voltages of a FET used in the RF amplifier are simultaneously switched OFF only during times before and after the magnetron performs oscillation, thereby switching an amplification function of the FET to an attenuation function thereof to increase a switching loss of the microwave frequency converter.

Abstract: A feedback loop corrects timing errors by reducing deviations from a constant radar sweep rate. Errors are detected and fed back to a phase corrector in a high gain feedback system. A precision radar rangefinder can be implemented with a direct digital synthesizer (DDS) that includes feedback error correction for reducing range errors by, for example, 100 times, or to 0.1 mm. An error-corrected DDS swept timing system can enable a new generation of highly flexible, repeatable and accurate radar, laser and guided wave rangefinders.

Abstract: An optical antenna assembly including multiple optical antenna elements, each of the optical antenna elements are arranged in a regular pattern and carried by a supporting body. The regular pattern of the plurality of optical antenna elements is nonuniform. Certain ones of the optical antenna elements are configured to respond to the one or more waves of light.

Abstract: A GPS enabled timepiece. A timepiece in accordance with the present invention comprises a GPS receiver, wherein the GPS receiver is modified to operate in a timekeeping environment, a timepiece, coupled to the GPS receiver, wherein the GPS receiver provides time updates to the timepiece, and a display, coupled to the timepiece, wherein the GPS-updated time of the timepiece is displayed.

Abstract: An apparatus and method allow receivers to quickly acquire a pseudorandom noise signal. A receiver advantageously detects frequency shifts using a compact parallel process hardware implementation of a Discrete Fourier Transform (DFT). The simultaneous detection of multiple frequencies allows the receiver to search the frequency range of the transmitted signal in larger increments of frequency, thereby increasing the speed of acquisition. One receiver does not use coherent integration before computation of the transform and advantageously maintains a flat frequency response. The flat frequency response of the DFT circuit enables searching of multiple frequency offsets without CPU intensive processing to compensate for frequency response variations. A receiver can include a Doppler correction circuit, which permits correlation data with frequency shift in the code to be non-coherently integrated among relatively fewer addresses or tap positions in memory.

Abstract: Described is a tile module for a phased array system. The tile module includes array elements configured in a two-dimensional array which is part of a larger subarray in the phased array system. A control module communicates with each array element to control a phase shift and an attenuation. In one embodiment a two-dimensional overlapped subarray manifold provides a weighted combination of RF signals received by the array elements of the tile module and array elements of other tile modules disposed in the same subarray of the phased array system. In another embodiment the two-dimensional overlapped subarray manifold distributes to the array elements weighted combinations of transmit RF signals applied to the tile module and other tile modules disposed in the same subarray. Advantageously, tile modules can be fabricated in large quantities, can be tested and calibrated independently, and can easily be installed or replaced in the phased array system.

Abstract: A beamforming radio frequency (RF) circuit includes a plurality of antennas, a plurality of amplifiers and an adjust module. The plurality of antennas is operably coupled to interrelate a plurality of beamformed signal components with a beamformed signal. The plurality of amplifiers is operably coupled to interrelate the plurality of beamformed signal components with a plurality of adjusted signal components. The adjust module is operably coupled to interrelate coordinates of a signal with the plurality of adjusted signal components.

Abstract: A method and an apparatus are provided for determining location information of network equipment in a wireless communication system is provided. The method comprises estimating a parameter indicative of the location information for the network equipment based on a first beacon signal and a second beacon signal The first beacon signal may be detected before the second beacon signal from a transceiver associated with the network equipment and the second beacon signal.

Abstract: A back-array, full-direction, circular polarization antenna is disclosed to include a power divider, which has two input contact holes and an output contact hole respectively electrically connected to an internal circuit thereof, and two patch antennas respectively symmetrically connected to two opposite sides of the power divider to produce two electric fields with a 90-degrees phase difference kept between the mechanical degrees and the electric degrees produced by each electric field, each patch antenna having a patch-like ceramic body, a radiation metal electrode printed on one side of the patch-like ceramic body, and a metal contact pin affixed to the radiation metal electrode and the patch-like ceramic body and connected to one input contact hole of the power divider.

Abstract: Disclosed is a coupling antenna device for transceiving a plurality of wireless signals with multiple radiation frequencies. The coupling antenna device includes an antenna pattern having a plurality of adjacent resonating sectors, each of the resonating sectors having a length determined by a specific radiation frequency responsive to one of the wireless signals.

Abstract: An antenna includes loop and single-pole antenna members, and an inductor. The single-pole antenna member is spaced apart from the loop antenna member. The inductor has a first inductor terminal coupled to the loop antenna member, and a second inductor terminal coupled to the single pole antenna member. A desired resonance frequency of the antenna can be achieved by simply adjusting the inductance of the inductor.

Abstract: A planar antenna includes a ground plane having a ground point. A main radiating element has a feeding point positioned adjacent to the ground point. The main radiating element is positioned adjacent to a contact side of the ground plane such that a space is formed there between. A parasitic element is positioned adjacent to the contact side such that a space is formed there between. The main radiating element has a shape such that the space between the main radiating element and the contact side becomes larger as the main radiating element becomes closer to the parasitic element and the parasitic element has a shape such that the space between the parasitic element and the contact side becomes larger as the parasitic element becomes closer to the main radiating element. Additionally, the parasitic element may have a slit formed therein.

Abstract: Antennas using nonwoven geotextiles with embedded metallic or other wave carrying fibers are described herein. The geotextiles antennas are designed to be an internal, integral part of the nation's infrastructure. Geotextile antennas are flexible and easily conform to natural and manmade surfaces such as exterior building surfaces, for example, roads, roofs and bridges. Geotextile antennas are considerably less vulnerable to damage and probably much less expensive than the current, highly vulnerable and costly cell towers. In particular, geotextiles used in roads are especially well protected by the asphalt pavement above. The fabric-based conformal antenna enhances the usefulness and reliability of the communication infrastructure which is exceedingly vulnerable to vandalism, terrorism and natural disasters.

Abstract: Exemplary embodiments are provided of antenna modules for frequencies in the GHz range and that may be mountable on a motor vehicle. In various exemplary embodiments, an antenna module generally includes upper and low patch-antennas on respective upper and lower substrates. Each patch-antenna includes ?/2-antenna structure provided on the upper surface of the respective upper or lower substrate for reception of satellite-transmitted frequencies in the GHz range. A metallization is also provided on or in contact with the lower surfaces of the upper and lower substrates. A lower antenna connector runs from the lower ?/2-antenna structure through the lower substrate. An upper antenna connector, separate from the lower antenna connector, runs from the upper antenna structure through the upper substrate and the lower patch-antenna.

Abstract: Disclosed is a signal transceiving device (30) capable of being easily mounted on a substrate (10) and providing effective transceiving performance. At least one RF module (106) is disposed on the substrate. The signal transceiving device includes at least one antenna (32) for transmitting and receiving electromagnetic wave signals, a shielding apparatus (34) and a connecting member (36). The shielding apparatus includes a shield (346) for shielding electromagnetic interference signals generated by the at least one RF module, and a base (340) for supporting the shield. The connecting member (36) is connected to the at least one antenna and the base.

Abstract: A multi-band radio antenna device for a radio communication terminal includes an integral feed and ground structure electrically connected to a first radiating antenna element and a second radiating antenna element. The first radiating antenna element includes a first continuous trace of conductive material, wherein the first continuous trace has a first branch tuned to radiate at first frequencies in a first frequency band, and a second branch, which is tuned to radiate in a second frequency band at second frequencies approximately equal to or greater than two times the first frequencies. The said second radiating antenna element has a second continuous trace of conductive material, wherein the second continuous trace has a third branch capacitively coupled to the second branch. Such an antenna device is suitable for built-in antennas, at the same time having a wide high-frequency band bandwidth, which enables the antenna to be operable at a number of frequency bands.

Abstract: An object of the invention is to provide a portable radio apparatus capable of reducing a local SAR occurring when it is set close to a human head by suppressing concentration of the current flowing through an antenna element and a ground board. A portable radio apparatus according to the invention includes a first case 8; a second case 9; a plate-shaped antenna element 1 provided in the first case 8; a conductor ground board 2 provided in the second case 9 and having a ground potential; at least two feed points 3 spaced from each other, for energizing the antenna element 1; a radio circuit 5 provided on the conductor ground board 2; a power distributor 6 for outputting so as to distribute a high-frequency power input from the radio circuit 5; and a phase compensating unit 7 for compensating phases of high-frequency powers input from the power distributor in in-phase to output the compensated high-frequency powers to the at least two feed points respectively.

Abstract: A thin film switch with induced antenna effect includes two thin films, a touch circuit and an induced antenna circuit. The two films include two opposite inner surfaces and two opposite outer surfaces. The touch circuit includes a plurality of touch portions disposed on the opposite inner surfaces of the two thin films. The induced antenna circuit is disposed on at least one of the outer surfaces and includes at least one inductive element and an inductive loop. The inductive loop of the induced antenna circuit receives an external radio frequency signal and transfers it to the inductive element.

Abstract: Antenna system embodiments are shown which are especially suited for mounting on aircraft and for operation across widely-spaced frequency bands. Embodiments include blade members positioned in a ring arrangement and tuning circuits that are each coupled between a respective pair of the blade members and configured to successively remove blade members from operation as the operational frequency increases.

Abstract: In a microstrip antenna equipped with a nearly flat plate-like radiating conductor, a nearly flat plate-like ground conductor having larger area than the radiating conductor, and a dielectric substrate set between the radiating conductor and the ground conductor, and one terminal of a feeding cable is connected to the radiating conductor, and the other terminal is connected to the ground conductor, the radiating conductor and the ground conductor are composed of nearly cloth-like substances having flexibility and conductivity, and also the dielectric substrate is composed of a nearly cloth-like substance having flexibility and insulation property, and the connection of the terminal of the feeding cable to the radiating conductor or the ground conductor is composed of by soldering through a conductive medium.

Abstract: An antenna assembly includes at least two active or main radiating omni-directional antenna elements arranged with at least one beam control or passive antenna element used as a reflector. The beam control antenna element(s) may have multiple reactance elements that can electrically terminate it to adjust the input or output beam pattern(s) produced by the combination of the active antenna elements and the beam control antenna element(s). More specifically, the beam control antenna element(s) may be coupled to different terminating reactances to change beam characteristics, such as the directivity and angular beam width. Processing may be employed to select which terminating reactance to use. Consequently, the radiator pattern of the antenna can be more easily directed towards a specific target receiver/transmitter, reduce signal-to-noise interference levels, and/or increase gain.

Abstract: An antenna device includes an antenna for receiving a time information radio wave, and an antenna support member. In the antenna, a coil is wound around a center portion of a core. In the support member, a non-magnetic portion supports two magnetic portions independently and both end portions of the core of the antenna are magnetically coupled with the magnetic portions. A radio wave controlled timepiece includes a case in an inner space of which the antenna and the support member are installed as described above. In the inner space, a time counting unit, a time display unit connected to the time counting unit, and a time updating unit configured to update the time displayed on the display unit, based on the time information radio wave received by the antenna, are installed.

Abstract: A complementary wideband antenna includes a planar dipole formed of two dipole sections and a shorted patch antenna located between the dipole sections, the dipole sections being spaced above a ground plane. A variety of different feed probe designs can be used to excite the antenna. The complementary wideband antenna has electrical characteristics including low back radiation, low cross polarization, a symmetrical radiation pattern, and is stable in gain and radiation pattern shape over the frequency bandwidth.

Abstract: An antenna apparatus, which can increase capacity in a cellular communication system or Wireless Local Area Network (WLAN), such as an 802.11 network, operates in conjunction with a mobile subscriber unit or client station. At least one antenna element is active and located within multiple passive antenna elements. The passive antenna elements are coupled to selectable impedance components for phase control of re-radiated RF signals. Various techniques for determining the phase of each antenna element are supported to enable the antenna apparatus to direct an antenna beam pattern toward a base station or access point with maximum gain, and, consequently, maximum signal-to-noise ratio. By directionally receiving and transmitting signals, multipath fading is greatly reduced as well as intercell interference.

Abstract: A satellite antenna mounting system primarily for residential homes including a dish, feed horn, elevation, clamp, and mast. The main body of the clamp to which the assemblage of the dish, feed horn, and elevation bracket are attached is provided with a downwardly inclined tab or clip member. In operation, the clamp of the assemblage can be lowered to receive the upper portion of the mast which is affixed to the roof or other part of the house. In doing so, the clip member engages the upper rim of the mast and firmly attaches or clips the assemblage to the mast with the dish in its desired elevation. Thereafter, the loose clamp can be tightened about the upper portion of the mast at the desired azimuth without affecting the set elevation of the dish.

Abstract: An exterior vehicle component includes a proximity member disposed along an outer perimeter of an electromagnetic wave transmission member provided at a center of the component which is disposed in front of a radar device. The proximity member includes a chromium-plated portion formed on its front surface which reflects an electromagnetic wave. The proximity member is formed of an acrylate-styrene-acrylonitrile resin or a modified polyphenylene oxide resin having an attenuation coefficient for electromagnetic wave transmission, which is equal to or greater than a predetermined value.

Abstract: A satellite dish antenna assembly includes a dish surface, a convexly curved arc surface, a pair of corresponding protruding edges A, B disposed at the utmost front end of the two sides and serving as a base line AB, such that upper and lower ends of the arc surface are extended from the two protruding edges along the dish to a level position of the base line AB to form an upper and a lower pulling surface coupled to the two protruding edges respectively, and a flange is installed at the periphery of the dish surface and its front side is substantially level, so as to overcome the shortcomings of the prior art antenna dish that may be deformed or warped easily when pressed and improve the life of the antenna and the accuracy of receiving signals.

Abstract: An automatic address dispatch method for control of a plurality of light emitting units includes the following steps, Step 1: installing a server having a network float address protocol; Step 2: providing a light emitting device with the same network float address protocol as that of the server; Step 3: the server being connected to one or a plurality of the light emitting device via a network; Step 4: the server automatically dispatching a unique address to each light emitting device on the network according to the network float address protocol; Step 5: the server relatively controlling the response of each light emitting device on network by the unique address.

Abstract: In an apparatus for driving a plurality of display units in a mobile electronic apparatus, each including a plurality of data lines, a plurality of scan line and a plurality of pixels each provided at one of the data lines and one of the scan lines, at least one of a common data driver circuit and a common scan driver circuit is provided. The common data driver circuit includes a plurality of first switch groups, each first switch group being connected to the data lines of one of the display units for driving the data lines of the one of the display units. The common scan driver circuit includes a plurality of second switch groups, each second switch group being connected to the scan lines of one of the display units for driving the scan lines of the one of the display units.

Abstract: A wearable computer for use in a process control environment includes a central processing unit, a memory and a number of other or integral devices such as a display, a microphone, a video camera, a voice recognition unit and a remote communication device that communicates with a host computer. The wearable computer provide information pertaining to one or more devices within a process control system (such as diagnostic information, help information, operator overviews, schematics or process parameter information) via the display. The wearable computer also executes a voice recognition routine that processes a received voice signal to automatically identify user inputs such as commands, process control devices within the field of view of the wearer, device tags, etc. and uses the user inputs to change a display, to alter a process signal, to retrieve device information etc.

Abstract: Provided are a display device and a driving method thereof, which is miniaturized thereby reducing manufacturing costs. The display device includes an interface which receives image information from at least one host device according to a specified or an unspecified transmission scheme to communicate with the host device, a memory which stores first recognition information corresponding to the specified transmission scheme and if the image information is applied according to the specified transmission scheme, which outputs the first recognition information through the interface to the host device, and a control unit which stores second recognition information corresponding to the unspecified transmission scheme and if the image information is applied according to the unspecified transmission scheme, which reads the second recognition information and outputs the read information through the interface to the host device.

Abstract: The subject apparatus is a three dimensional imaging system adapted to capture an actual object image from one location to be transmitted to a remote location for a continuous duplication of such image at a remote location, generally comprising an electrical system of light sensors dispersed above and laterally relative to the actual object to be photographed, such sensors being adapted to detect and sense the location, movement, shape and coloration and other attributes of the object image, each such sensors being capable of capturing a distinct and different aspect or feature of the actual object. The sensory and reproduction means at a distant location is equipped with an electrical means to detect and relay a sensual signal to a three dimensional physical matrix of lighted means to capture the image in the physical matrix through lighting of such members.

Abstract: A technology for illuminating almost an entire console with a simple structure, even when a display is located at the right or left of the center of the console is disclosed. According to this technology, when a display 1 is located at the center of a console 2, a detection signal of a sensor S1 is turned ON, a light L1 in the center of the display is lit, and the light illuminates the entire console. In addition, when the display is located at the right of the console, the detection signal of the sensor S2 is turned ON, the light L2 on the left-side of the display is lit, and the light can illuminate the entire console. In addition, when the display is located at the left of the console, the detection signal of the sensor S3 is turned ON, the light L3 on the right-side of the display is lit, and the light can illuminate the entire console.

Abstract: The present invention relates to an image display device that includes a display screen where subpixels emitting colored light of each color are arranged cyclically so as to repeat every predetermined display pixel pitch at least in a predetermined rotation arrangement direction and displays images on the display screen. The image display device displays images based on image data having a resolution higher than a resolution determined by the display pixel pitch after minimizing color differences from colors expressed by the image data. A weighting operation is performed which corresponds to a state where each data point is arranged not to overlap with the center of each subpixel to calculate data corresponding to each subpixel.

Abstract: A method and apparatus of driving a plasma display panel that is adaptive for making a stable operation at both a low temperature and a high temperature. In the apparatus, a scan driver supplies a rising ramp waveform in a set-up interval and a falling ramp waveform in a set-down interval. A temperature sensor senses a driving temperature of the panel to generate a bit control signal. A set-down control signal generator generates a control signal such that an application time of the falling ramp waveform can be controlled in correspondence with said bit control signal and for applying the control signal to the scan driver.

Abstract: A plasma display apparatus is provided. The plasma display apparatus comprises a plasma display panel for displaying an image using a plasma discharge; and a driver for driving the plasma display panel by enabling a length of an address period of at least one of subfields of a frame to be different from that of an address period of other subfields.

Abstract: A plasma display apparatus and a driving method thereof are provided. The plasma display apparatus and a driving method thereof represent an image by a combination of a plurality of subfields, supply a first pulse to the first electrode in a negative polarity direction before a reset period for initializing in at least one of the plurality of subfields, supply a second pulse to the second electrode in an opposite polarity direction of the first pulse while the first pulse is supplied to the first electrode, and do not supply a sustain pulse to at least one of the first electrode and the second electrode in a sustain period after the reset period.

Abstract: An apparatus for driving a plasma display panel that generates a power level to reduce manufacturing costs and pressure of circuitry elements. The plasma display panel is constructed with a plurality of electrodes. The apparatus includes a scan pulse application portion generating a scan pulse and outputting the scan pulse to first electrodes among the plurality of electrodes, a sustain pulse generation portion generating a sustain pulse, and a bootstrap portion performing a bootstrap operation using a high level and a low level of the sustain pulse, and generating a low level voltage of the scan pulse.

Abstract: A self-contained electroluminescent (EL) wire display device is presented for displaying different types of user-configurable information. Generally, the device includes a display module which contains an array of pegs located within a viewable window. Individual segments of EL wire are routed by a user through the array of pegs into a desired pattern. The edges of the display module are framed by hinged border strips. EL wire connectors are located along these edges underneath the border strips. A control module is included inside the display module which supplies an independent electrical signal to each connector. These signals cause the EL wires to emit light in a prescribed brightness and timing pattern according to the settings of various user controls located on the periphery of the display module. These controls allow the user to select from different display modes and adjust the overall sensitivity and brightness of the display module.

Abstract: In a drive device of a display panel, a write operation (Ws, We) for writing display data into a frame memory and a read operation (a, a? to h, h?) for reading the display data written in the frame memory are performed. An implementation start timing a of the read operation is set to be after an implementation start timing Ws of the write operation, and an implementation end timing a? of the read operation is set to be upon or after an implementation end timing We of the write operation. The read operation is performed a plurality of times during one frame period.

Abstract: A light emitting diode (OLED) display and pixel driving method thereof are disclosed. Each storage capacitor is discharged via the driving TFT and OLED until conductive current of each OLED is almost zero so as to record a sum of a voltage drop across each OLED under a specific condition and the threshold voltage of the driving TFT. By using the sum of the voltage drop across each OLED and the threshold voltage of the corresponding TFT in the subsequent OLED driving process, the luminance reduction issue caused by TFT threshold-voltage shift and OLED material decay can be solved.

Abstract: A display device includes a pixel array in which a plurality of display pixels are arranged in a two-dimensional manner which is divided into a plurality of column groups composed of the display pixels of a predetermined number of columns, a signal drive circuit which produces a signal current based on display data, and sequentially outputs, in time series via a common terminals, the signal current that corresponds to the display pixels for one row of the pixel array for each of signal currents that correspond to each of the column groups, and a current latch circuit which sequentially captures and holds the signal currents output from the signal drive circuit for one row of the pixel array, generates gradation currents and simultaneously supplies the gradation currents to the plurality of data lines, wherein the pixel array and the current latch circuit are formed on a display panel substrate.