Abstract: An organic light emitting display that reduces the number of output lines from a data driver, attains image stability, and adjusts white balance. A plurality of demultiplexers at the primary output lines of the data driver simultaneously supply the data signals from each primary output line to a plurality of secondary output lines allowing a reduced number of primary output lines. A plurality of parasitic capacitors are formed where data lines are coupled with the pixels and are charged to a voltage corresponding to the data signal that is simultaneously provided to the pixels allowing an image of uniform brightness to be displayed. The scan period and the data period are not overlapping allowing a stable image. Capacitance values of data capacitors are set taking into consideration the light emitting efficiency of organic light emitting diodes, allowing an image of adjusted white balance.

Abstract: Disclosed is an organic light emitting display that reduces the number of output lines and adjusts a white balance. A scan driver supplies scan signals to a plurality of scan lines. A data driver supplies data signals to a plurality of output lines. Demultiplexers are installed at the respective output lines, and supply the data signals to the plurality of data lines. Data capacitors are coupled with the data lines, and charge a voltage corresponding to the data signals. An image display device is coupled with the scan lines and the data lines, and includes red pixels having a red organic light emitting diode, green pixels having a green organic light emitting diode, and blue pixels having a blue organic light emitting diode. A first initialization power supply supplies a first voltage to the red pixels. A second initialization power supply supplies a second voltage to the green pixels. A third initialization power supply supplies a third voltage to the blue pixels.

Abstract: An organic light emitting display including a demultiplexer on each data line that splits and supplies each data signal to a plurality of data lines, thereby decreasing the number of output lines required and reducing production cost. Further, voltages corresponding to the data signals are sequentially charged in data capacitors, while the charged voltages are supplied to the pixels simultaneously allowing the organic light emitting display to display an image with uniform brightness. Scan periods for supplying the scan signals do not overlap with data periods for supplying the data signals thus yielding a stable image. Also, the capacitance of the data capacitor is set to compensate the voltage drop in the first power source line, thereby displaying an image with uniform brightness.

Abstract: An organic light emitting display (OLED) device having an automatic brightness control apparatus that can control the luminance of the OLED device according to the brightness of ambient light. The OLED device includes a light sensor adapted to sense ambient light and produce an output voltage corresponding to the ambient light. The automatic brightness control apparatus is adapted to adjust a gamma value to the output voltage and output a gamma reference voltage. The automatic brightness control apparatus is adapted to sense a change in the ambient light by synchronizing the output voltage of the light sensor with a vertical synchronization (Vsync) signal. Accordingly, the gamma value varies with the brightness of the ambient light so that the luminance of the OLED device is controlled according to the brightness of the ambient light.

Abstract: A video signal processing method and a delta-structured display device using the same where video signals are rearranged in a logical structure such as a programmable logic chip. The video signal processing method includes receiving sequentially first line video signals and second line video signals, each having a plurality of video signals having red sub video signals, green sub video signals, and blue sub video signals, extracting alternately one of the red sub video signals, the green sub video signals, and the blue sub video signals for at least two successive video signals of the first line video signals and storing the extracted signals into a memory as the first line delta video signal, and alternately extracting one of the red sub video signals, the green sub video signals, and the blue sub video signals for at least two successive video signals of the second line video signals and storing the extracted signals into a memory as the first line delta video signals.

Abstract: A flat panel display device includes a display region formed on a substrate, the display region having a gate electrode, a source electrode, a drain electrode, and a self-emission device with two electrodes, and displaying a predetermined image; a covering member to cover at least the display region; a sealing member comprising a sealing material coated outside and around at least the display region, by which edges of the covering member are bonded to the substrate to seal at least the display region; a terminal region installed on the substrate outside the sealing member; and a driving power supply line to supply a driving potential power and/or a source current to the display region, the driving power supply line comprising at least two conductive layers and being arranged in such a way that at least a part of the driving power supply line is positioned between the sealing member and the substrate.

Abstract: A pixel circuit in an organic light emitting device capable of realizing high gradation representation by self-compensating a threshold voltage, and a method for driving the same. The pixel circuit includes an electroluminescent element for emitting light in response to an applied driving current. A first transistor delivers a data signal voltage in response to a current scan line signal. A second transistor generates a driving current to drive the electroluminescent element in response to the data signal voltage. A third transistor connects the second transistor in the form of a diode in response to a current scan signal to self-compensate the threshold voltage of the second transistor. A capacitor stores the data signal voltage delivered to the second transistor. A fourth transistor delivers a power supply voltage to the second transistor in response to a current light-emitting signal.

Abstract: A light emitting display includes pixel circuits capable of compensating for the threshold voltages of their driving transistors. Each pixel circuit includes a driving transistor, a capacitor having one end coupled to a gate electrode of the driving transistor, a first switch coupled between the gate electrode of the driving transistor and a first main electrode, which is turned on in response to a first level of a first control signal for diode-coupling the driving transistor, and a second switch turned on in response to a second level of a second control signal to transmit current flowing out of the first main electrode of the driving transistor to a light emitting element. The second switch is turned on when the first switch is turned on for a first period longer than 0.05 ?s and shorter than 2.5 ?s. The second switch is turned on when the first switch is turned off.

Abstract: In a pixel circuit of an organic EL display device, a gate of a driving transistor is coupled to a gate of a compensating transistor, which is configured to operate as a diode. A precharge voltage is applied to the gate of the driving transistor while a selection signal is applied to a previous scan line, so that the compensating transistor is biased in a forward direction to apply a data voltage on the gate of the drive transistor. The driving transistor may be electrically isolated from the organic EL element (OLED) while precharging, so as to prevent the OLED from emitting a light using the precharge voltage. In addition, the driving transistor may be electrically isolated from the OLED while the data voltage is being charged, so as to prevent the OLED from emitting a light.

Abstract: A light emission display includes data lines, scan lines, and pixel circuits. A pixel circuit of the pixel circuits includes: a light emission element; a first transistor including a control electrode and first and second electrodes, the first transistor outputting a current corresponding to a voltage between the first electrode and the control electrode; a first switch coupled between the control electrode of the first transistor and the light emission element and for receiving a first control signal; a first capacitor coupled to the first transistor; a second capacitor coupled between a first power source and the first capacitor; a second switch for coupling the first capacitor and a second power source in response to a second control signal; and a third switch for applying a data voltage to the first capacitor in response to a select signal provided by one of the scan lines.

Abstract: A light emitting display including data lines for applying data voltages corresponding to video signals, scan lines for transmitting select signals, and pixel circuits. Each pixel circuit includes a light emitting element for emitting light, and a transistor including first to third electrodes, for controlling a current output to the third electrode according to a voltage between the first and second electrodes. Each pixel circuit also includes a first switch for diode-connecting the transistor, a capacitor having a first electrode coupled to the first electrode of the transistor, a second switch for applying a corresponding said data voltage to the second electrode of the capacitor in response to a corresponding said select signal from a corresponding said scan line, and a third switch for substantially electrically decoupling the second electrode of the capacitor from a power supply voltage source.

Abstract: An image display having a display panel including pixels in a matrix pattern, anodes formed corresponding to the pixels, a cathode in common with the anodes, EL elements provided between the anode and the cathode and including a light emitting layer, and TFTs for controlling the current supply to the EL elements. The display also has a scan driver for selecting pixel lines on the display panel, a data driver for applying RGB display signals corresponding to a pixel line of the display panel when the pixel line is selected, and a display controller for using a current value fed back by the common cathode and externally input RGB data to correct a white gray level of the RGB data and to generate RGB display data to the data driver.

Abstract: An image display apparatus with pixels where each of the pixels has a light emitting element such as an organic EL (electro-luminescence) element. The brightness of the light emitting element is controlled by the current flowing in the light emitting element. The image display apparatus adjusts the amplitude of the white gray levels in accordance with average brightness of a screen displayed by RGB data.

Abstract: In an exemplary embodiment of the present invention, there is provided a pixel circuit for a luminescent display, in which plural pixel circuits are formed in a plurality of pixels defined by a plurality of data lines and a plurality of scan lines.

Abstract: A pixel circuit of a light-emitting display that reduces the influence of kickback generated by parasitic capacitance. The pixel circuit includes first to fourth transistors, a capacitor, and a light-emitting element. The first and second transistors are serially coupled to each other and turned on in response to a first control signal. The capacitor is coupled in parallel with the first and second transistors. The third transistor supplies a data voltage to a first electrode of the capacitor in response to a select signal. The fourth transistor outputs a current corresponding to its gate-source voltage, which is based on the voltage of the capacitor. The light-emitting element emits light corresponding to the current from the fourth transistor.

Abstract: An organic light emitting display (OLED) device having an automatic brightness control apparatus that can control the luminance of the OLED device according to the brightness of ambient light. The OLED device includes a light sensor adapted to sense ambient light and produce an output voltage corresponding to the ambient light. The automatic brightness control apparatus is adapted to adjust a gamma value to the output voltage and output a gamma reference voltage. The automatic brightness control apparatus is adapted to sense a change in the ambient light by synchronizing the output voltage of the light sensor with a vertical synchronization (Vsync) signal. Accordingly, the gamma value varies with the brightness of the ambient light so that the luminance of the OLED device is controlled according to the brightness of the ambient light.

Abstract: A light emitting display includes: a pixel portion including a plurality of pixels; a scan driver adapted to supply a scan signal to scan lines connected to the pixels; a DC/DC converter adapted to supply a first voltage and a second voltage to the plurality of pixels; and a synchronizer adapted to maintain a ripple voltage of the first voltage at a predetermined level when the scan signals are converted into a turn off voltage. With this configuration, since the ripple voltage of the first voltage is always kept constant when the scan signal is turned off, a uniform brightness in a horizontal line and a frame can be displayed.

Abstract: The present invention relates to a light emitting display, and display panel and driving method thereof. The display panel includes a plurality of data lines for transmitting a data signal, a plurality of scan lines for transmitting a selection signal, and a plurality of pixels coupled to the data lines and the scan lines. The pixel includes at least two emitters for emitting different colors from each other in response to an applied current, and a driver for receiving the data signal while the selection signal is applied and outputting a first current corresponding to the data signal. The driver outputs the first current to at least the first and second emitters for emitting substantially the same color among the emitters formed in the pixels.

Abstract: A light emitting display includes pixel circuits capable of compensating for the threshold voltages of their driving transistors. Each pixel circuit includes a driving transistor, a capacitor having one end coupled to a gate electrode of the driving transistor, a first switch coupled between the gate electrode of the driving transistor and a first main electrode, which is turned on in response to a first level of a first control signal for diode-coupling the driving transistor, and a second switch turned on in response to a second level of a second control signal to transmit current flowing out of the first main electrode of the driving transistor to a light emitting element. The second switch is turned on when the first switch is turned on for a first period longer than 0.05 ?s and shorter than 2.5 ?s. The second switch is turned on when the first switch is turned off.

Abstract: A pixel circuit of a light-emitting display that reduces the influence of kickback generated by parasitic capacitance. The pixel circuit includes first to fourth transistors, a capacitor, and a light-emitting element. The first and second transistors are serially coupled to each other and turned on in response to a first control signal. The capacitor is coupled in parallel with the first and second transistors. The third transistor supplies a data voltage to a first electrode of the capacitor in response to a select signal. The fourth transistor outputs a current corresponding to its gate-source voltage, which is based on the voltage of the capacitor. The light-emitting element emits light corresponding to the current from the fourth transistor.