摘要:
An organic light emitting display device and a method of driving the same. In a method of driving an organic light emitting display device including a second capacitor having a first terminal coupled to a gate electrode of a driving transistor and a first capacitor coupled between the gate electrode of the driving transistor and a first power source, the driving method includes supplying a threshold voltage of an organic light emitting diode to a second terminal of the second capacitor during a period when a first current is sunk via the driving transistor, and supplying a data signal to the second terminal of the second capacitor after a voltage corresponding to a difference between a voltage applied to the gate electrode of the driving transistor and the threshold voltage of the organic light emitting diode is charged in the second capacitor.
摘要:
A pixel circuit includes: an OLED; a second transistor including gate, first, and second terminals coupled to a first scan line, a data line, and a first node, respectively; a fourth transistor including gate, first, and second terminals coupled to a third scan line, the first node, and a second node, respectively; a third transistor including gate, first, and second terminals coupled to a second scan line, a reference power source, and the second node, respectively; a fifth transistor including gate, first, and second terminals coupled to a light emission control line, a third node, and an anode of the OLED, respectively; a first capacitor coupled between the first and second nodes; a second capacitor coupled between the second and third nodes; and a first transistor including gate, first, and second terminals coupled to the first node, a first power source, and the third node, respectively.
摘要:
A scan driving circuit that generates a plurality of scan signals overlapping with each other by h horizontal cycles, that is driven by using (2h+2) clock signals, and that includes a small number of transistors, where h denotes a natural number less than or equal to n−1 and n is an integer greater than “4.”
摘要:
A scan driver includes a plurality of stages and is capable of overlapped driving of scan signals output by each of the stages. A method of driving the scan driver, and an organic light emitting display device including the scan driver, is provided.
摘要:
An organic light emitting display, suitable for a high quality and high resolution display device, rapidly charges a data voltage using a voltage programming technique, after compensating for a deviations in the threshold voltage and mobility of a driving transistor using a current programming technique. The organic light emitting display includes: a data line supplying a data signal; a scan line supplying a scan signal; a first switching element, electrically coupling its control electrode to the scan line, transferring the data signal supplied from the data line; a driving transistor, electrically coupling its control electrode to the first switching element, controlling a driving current of a first voltage line; a first capacitive element electrically coupled between the first switching element and the control electrode of the driving transistor; an Organic Light Emitting Diode (OLED), electrically coupled between the driving transistor and a second power voltage line, displaying an image by a current supplied from the driving transistor; and a fourth switching element compensating for deviations of characteristics of the driving transistor by supplying a current of the first current line to the driving transistor.
摘要:
An organic light emitting display device includes: a scan driver for supplying partially overlapping scan signals having at least 2H width and for supplying emission control signals; a data driver; and pixels, each including: an OLED having a cathode coupled to second power; a first transistor having a first electrode coupled to first power; a second transistor between a gate electrode and a second electrode of the first transistor and turned on when the scan signal is supplied to a current scan line; a third transistor between the data line and a second node and turned on when the scan signal is supplied to a subsequent scan line; a first capacitor coupled between the first transistor gate electrode and the second node; and a fourth transistor turned on when the scan signal is supplied to a previous scan line to supply a first voltage to the first transistor gate electrode.
摘要:
An organic light emitting display device includes a scan driver, a data driver, and pixels. The scan driver is for sequentially supplying, during each horizontal period of a width 1H, a scan signal with a width of at least 2H to scan lines. The scan driver is further for sequentially supplying an emission control signal to emission control lines that are substantially parallel to the scan lines. The data driver supplies data signals to data lines. Each pixel includes an organic light emitting diode (OLED), a pixel circuit having a first transistor for controlling the amount of current supplied to the OLED, and a compensator for controlling the voltage of a gate electrode of the first transistor for compensating a degradation of the OLED. The compensator includes two transistors and a capacitor. One transistor is coupled to a scan line, and the other is coupled to an emission control line.
摘要:
A scan driver and a flat panel display apparatus including the scan driver. The scan driver includes a plurality of scan stages, wherein two transistors are coupled between each scan stage such that the scan driver is capable of performing progressive scanning or interlaced scanning.
摘要:
An organic electro-luminescent display apparatus can compensate for the threshold voltage and voltage drop of the driving transistor. The organic electro-luminescent display apparatus divides and drives an initialization time, thereby improving a contrast ratio. The organic electro-luminescent display apparatus minimizes or reduces the change of a current due to a leakage current by correcting the leakage current corresponding to a data voltage with a fixed power source, thereby improving crosstalk. The organic electro-luminescent display apparatus adjusts the duty of the emission control signal, thereby removing or reducing motion blur.
摘要:
A system on panel (SOP)-type emission driving device of an organic light emitting display device. The emission driving device includes an odd emission control line controller having a plurality of flip-flops for outputting emission control signals to odd emission control lines, and an even line controller having a plurality of flip-flops for outputting emission control signals to even emission control lines. Each of the flip-flops alternately receives a clock signal and an inverted clock signal for causing the flip-flip to output an emission control signal. In one embodiment, each flip-flop includes nine PMOS transistors and two capacitors.