Abstract: A data driver includes a shift register circuit configured to receive a first clock signal, a second clock signal, and a start signal, and to sequentially provide a sampling signal, a conversion circuit configured to receive the first clock signal, the second clock signal, and the sampling signal, and to sequentially provide a conversion signal, a sampling latch circuit configured to store data according to the sampling signal and the conversion signal, and a holding latch circuit configured to receive the data from the sampling latch circuit in response to first and second enable signals, and to provide a first data signal or a second data signal to data lines corresponding to the received data.

Abstract: In an organic light emitting display, a first pixel and a second pixel share a data line, a select scan line, and a driving element, and a field is divided into first and second subfields. An organic light emitting element of the first pixel is driven by a first emission control signal transmitted to a first emit scan line, and an organic light emitting element of the first pixel is driven by a second emission control signal transmitted to a second emit scan line. The first emission control signal has a low-level pulse in the first subfield, the second emission control signal has a low-level pulse in the second subfield, and a select signal transmitted to the select scan line has a low-level pulse in each of the first and second subfields. In addition, a scan driver for driving the select signal line, the first emit scan line, and the second emit scan line is provided.

Abstract: A display device includes a demultiplexer. The demultiplexer programs time-divided and sequentially input data currents to at least two signal lines. The demultiplexer includes first and second sample/hold circuits for alternately sampling data currents and holding sampled data corresponding to the sampled data, and third and fourth sample/hold circuits for respectively sampling the sampled data held by the first and second sample/hold circuits and programming the current which correspond to the sampled data to the two signal lines.

Abstract: A scan driving circuit includes a first scan driver including a plurality of first units, the first units receiving an input signal or an output voltage of a previous first unit and first and second clock signals to output a scan signal, and a second scan driver having a plurality of second units, the second units receiving a plurality of scan signals output from respective ones of the first units, and at least one of the first and second clock signals, and outputting an emission control signal.

Abstract: An organic electroluminescent display and a demultiplexer, wherein the organic electroluminescent display comprises: a plurality of pixels including a plurality of sub-pixels and displaying images corresponding to a first data current; a plurality of scan lines transmitting a scan signal to the plurality of pixels; a plurality of first data lines transmitting the first data current to the plurality of pixels; a scan driver outputting the scan signal to the plurality of scan lines; a demultiplexer comprising a plurality of sample-and-hold demultiplexing circuits; and a data driver outputting a second data current to a plurality of second data lines, wherein the demultiplexing circuit transmits the first data current, obtained by demultiplexing the second data current in sample/hold method, to the first data lines, wherein a pre-charge voltage corresponding to the second data current is previously transmitted to the first data lines before the first data current is transmitted to the first data lines.

Abstract: A data driving circuit may include a shift register unit which may further include a plurality of first stages connected in series that may receive data signals and may output the data signals, in which each first stage may receive the data signals output from a preceding first stage, a latch unit including a plurality of second stages, in which each second stage may be connected to a different predetermined first stage, in which each second stage receives the data signals output from the predetermined first stage, in which the number of second stages may be substantially half the number of the first stages, and a D/A converter connected to the latch unit which may receive digital data signals and output analog data signals.

Abstract: A data driving circuit including n channels, where n is an integer, the data driving circuit including a shift register unit receiving data during a first input period and a second input period, the shift register unit shifting and outputting the received data, a first latch unit receiving the data input during the first input period from the shift register unit, and simultaneously or substantially simultaneously outputting the data corresponding to the first input period, and a second latch unit receiving the data input during the second input period from the shift register unit, and simultaneously or substantially simultaneously outputting the data corresponding to the second input period.

Abstract: A light emitting display device including data lines, signal lines, pixel circuits, a data driver, and a precharger. Each pixel circuit includes a first switch, a transistor, a capacitor, and a light emitting element. The precharger supplies a precharge current of X times a data current to a corresponding data line in response to a control signal. When the first switch transmits the data current provided from the corresponding data line in response to a first level scan signal while the corresponding data line is precharged, a voltage corresponding to the data current is charged in the capacitor. A current corresponding to the charged voltage is supplied to the light emitting element through the transistor in response to a second level scan signal, and the light emitting element emits light.

Abstract: A scan driving circuit and an organic light emitting display using the same. The scan driving circuit includes stages that each includes: a switch for turning on/off a connection of the input terminal according to a first clock among a plurality of clocks, the first clock for inputting through a first clock terminal; a switch section for transferring a first voltage to the output terminal according to the first clock among the three clocks, and for preventing the first voltage from being transferred to the output terminal according to the input signal; and a storage section for maintaining a voltage of the output terminal for a predetermined time, and for transferring a voltage of a second clock among the three clocks to the output terminal according to the input signal, the second clock for inputting through the second clock terminal.

Abstract: An organic light emitting display capable of compensating for threshold voltage variations of a driving transistor may include scan and data drivers, pixels, an initial power source unit, a switching unit, a compensating unit, and a timing controller. The scan and data drivers may control current that flows from a first to a second power source via an OLED. The switching unit may selectively couple the initial power source unit to the data driver. The compensating unit may store second data corresponding to a threshold voltage of a driving transistor and may transmit the stored second data to the data driver. The timing controller may transmit the externally supplied first data input to the data driver and may control the scan driver, the data driver, and the compensating unit. The data driver may generate and supply third data signals to the pixels using the first and the second data.

Abstract: An organic electroluminescence display and a method of operating the organic electroluminescence display are disclosed. A pixel array unit, including a plurality of pixels, is divided into at least two pixel groups adjacent to each other. The first pixel group is selected by a first scan driving unit and the second pixel group is selected by a second scan driving unit. Scanning lines for selecting the first pixel group extend into the first pixel group and scanning lines for selecting the second pixel group extend into the second pixel group. Accordingly, each scanning line is reduced in length and thus impedance of the scanning line is decreased. The reduction of impedance prevents delay or distortion of scan signals.

Abstract: An organic light emitting display device includes data lines, selection scan lines, and emission scan lines for transmitting data signals, selection signals, and emission signals, respectively. Pixel circuits are arranged at regions defined by the data lines and the selection scan lines. A first scan driving unit outputs the emission signals. The first scan driving unit includes conversion circuits, each of the conversion circuits including conversion circuit transistors of an identical channel type. Each of the conversion circuits receives a first signal, a second signal, a third signal and a conversion circuit clock signal, and outputs a conversion output signal as a respective emission signal of the emission signals.

Abstract: A scan driving circuit including an input terminal to receive an input signal or a voltage output from a previous stage; first and second clock terminals to receive first and second clock signals having phases inverted to each other and partially overlap at a high level, respectively; and a plurality of stages having an output terminal to output scan signals having a low level in sequence, leaving an interval between the scan signals, equivalent to a time the first and second clock signals overlap at the high level, wherein the output terminal of the stage is maintained to have a non-floating state regardless of whether the stage outputs the scan signal.

Abstract: A display device and a demultiplexer. A display device includes plural pixels for displaying an image corresponding to first data currents, each pixel including plural sub-pixels. The display device also includes plural scan lines for applying scan signals to the pixels; plural first data lines for applying the first data currents to the pixels; a scan driver for outputting the scan signals to the scan lines; a demultiplexer including plural demultiplexing circuits; and a data driver for transmitting second data currents to plural second data lines. The demultiplexing circuits demultiplex second data currents into first data currents, and transmit the first data currents to the first data lines. A pre-charge voltage is applied to the first data lines before the first data currents are transmitted. This way, the data driver is simplified, and the first data lines are pre-charged with a suitable voltage before programming data, thereby reducing programming time.

Abstract: A scan driving circuit and an organic light emitting display using the same is disclosed. A first scan driver having a plurality of first stages sequentially outputs a selection signal, and a second scan driver having a plurality of second stages sequentially outputs an emission signal. Each of the first and second stages are configured so as to have substantially zero static current, and operation speed can be optimized without significant increase in power consumption.

Abstract: An organic light emitting diode display device. A first capacitor is coupled between a gate of a first transistor and a first voltage source, and a second transistor is coupled between the gate of the first transistor and a second voltage source. A third transistor is coupled between the first voltage source and the gate of the first transistor, and a fourth transistor is coupled to a data line. A second capacitor stores the data voltage from the fourth transistor, and is for determining a gate-source voltage of the first transistor. The threshold voltage compensator compensates a threshold voltage of the third transistor together with the second capacitor, and the fifth transistor transmits a current of a drain of the first transistor to the organic light emitting diode. A photoelectric transformation element transmits a current corresponding to a light emitted by the organic light emitting diode to the second capacitor.

Abstract: A light emission device according to the present invention includes a plurality of pixel circuits in a matrix. A plurality of first scan lines transmits a selection signal to select the pixel circuits. A plurality of second scan lines transmits an emission signal to control the duration of light emission of the pixel circuits. A scan driver sequentially delays a primary signal having a first-level pulse about a first period for generating a plurality of secondary signals, inverting the plurality of secondary signals for outputting the emission signal, and generating a signal having a second-level pulse when the secondary signal and the emission signal are in the first-level.

Abstract: An organic electroluminescent display and a demultiplexer, wherein the organic electroluminescent display comprising: a plurality of pixels displaying an image corresponding to output data current; a plurality of scan lines to transmit a scan signal to the plurality of pixels; a plurality of output data lines to transmit the output data current to the plurality of pixels; a scan driver outputting the scan signal to the plurality of scan lines; a demultiplexer comprising a plurality of demultiplexing circuit; and a data driver outputting input data current to the demultiplexer, wherein the demultiplexing circuit transmits the input data current after applying pre-charging voltage to the output data line selected among the output data lines in sequence.

Abstract: Disclosed is a display device using a demultiplexer. The demultiplexer sequentially samples the data current that is time-divided and applied by a data driver, and holds it to the data lines. Since the demultiplexer is to sample the data currents corresponding to N data lines during one horizontal period when performing 1:N demultiplexing, the data current corresponding to one data line is sampled during the 1/N horizontal period. In the present invention, a signal line coupled between the demultiplexer and the data driver is precharged with the current before coupling a precharge circuit to a sample/hold circuit and sampling the data current. The precharge current is M times the data current where M is a real number greater than 1.

Abstract: In a display device, a demultiplexer is used to transmit a data current to a data line. The demultiplexer includes a plurality of sample/hold circuits for sampling the time-divided and sequentially input current and holding them to the data line. A plurality of data lines coupled to the demultiplexer are coupled to pixels of the same color, and hence, currents with different levels are transmitted to pixels of different colors. A sample/hold circuit for transmitting a higher level current uses a driving transistor having a larger ratio of a channel width and a channel length.