Patent application number | Description | Published |
20100045656 | Display driver with charge pumping signals synchronized to different clocks for multiple modes - A display driver generates a respective charge pumping signal and respective driving signals synchronized to a respective same clock signal for each of the CPU and video interface modes. Because such respective signals are synchronized to a respective same clock signal, the noise superimposed on the driving signals applied on a display panel is regular and uniform across the whole display panel, for each of the CPU and video interface modes. Accordingly, affects of such regular noise are advantageously not noticeable to the human eye, for both the video and CPU interface modes of operation. | 02-25-2010 |
20140091992 | DISPLAY APPARATUS - A display device which includes a substrate having a pixel unit that receiving first and second voltages is disclosed. In one aspect, the first and second power lines are coupled to the first and second voltages, and are supplied to the pixel unit via first and second power pads. In some aspects, the first and second power pads are alternately disposed while being spaced apart from each other in at least a portion of the peripheral area, and the second power pads are disposed in the space between the respective first power pads. | 04-03-2014 |
20140168280 | ORGANIC LIGHT EMITTING DISPLAY DEVICE AND DRIVING METHOD THEREOF - A driving method of an organic light emitting display device includes sensing temperatures of a plurality of areas included in a pixel unit and, when a temperature difference between the respective areas is less than a predetermined reference value, outputting first data that is input from outside. When the temperature difference between the respective areas is equal to or greater than the reference value, the method includes generating second data by changing a grayscale of the first data such that the temperatures of the respective areas are similar to each other, and outputting the second data. | 06-19-2014 |
20140292822 | ORGANIC LIGHT EMITTING DIODE DISPLAY - An organic light emitting diode (OLED) display includes a display unit including first pixels emitting first color light, second pixels emitting second color light, and third pixels emitting third color light, and a power source voltage supplier supplying a driving voltage to the respective pixels of the display unit. The display further includes a first voltage wire transferring the driving voltage to the first pixels, a second voltage wire transferring the driving voltage to the second pixels, and a third voltage wire transferring the driving voltage to the third pixels. The first, second and third voltage wires being provided in a first layer. The display includes auxiliary voltage wires provided in a second layer different from the first layer. Contact areas between the first, second and third voltage wire and the auxiliary voltage wires are different from each other. | 10-02-2014 |
20140300592 | DISPLAY DEVICE AND METHOD OF DRIVING THE SAME - Provided is a display device and a method of driving the same. The display device includes a display panel including a plurality of pixels, a data scaling unit scaling a data value of image data received from the outside based on a scaling ratio, a data driver providing a data signal to data lines connected to the plurality of pixels in response to the scaled data value, and a power unit that generates a driving voltage for emitting light from the plurality of pixels and changes the driving voltage in response to the scaled data value. | 10-09-2014 |
20140347402 | DISPLAY DEVICE AND DISPLAY DEVICE DRIVING METHOD - A display device includes a display unit including pixels, each of which emits light according to data voltages, respectively; and a timing controller which divides an area of the display unit into an upper, center and bottom portions, divides one frame time into light emission sub-frames of a light emission period and a blank sub-frame of a blank period in which is supplied a black data signal, divides the upper, center and the bottom portions into groups, differentiates a scan start time of a light emission sub-frame and a scan start time of the blank sub-frame of each group, and increases the light emission period and decreases the blank period in proportional to an increase ratio of the light emission period as a group is closer to a middle of the center portion. | 11-27-2014 |
20150015563 | PIXEL CIRCUIT, DISPLAY DEVICE USING THE SAME, AND DISPLAY DEVICE DRIVING METHOD - A pixel circuit includes: an organic light emitting diode (“OLED”); a threshold circuit which generates an output signal based on an input signal, where the threshold circuit has a hysteresis characteristic with respect to the input signal; a first transistor including a first electrode connected to a data line, a second electrode connected to an input terminal of the threshold circuit, and a gate electrode connected to a scan line; and a second transistor including a first electrode connected to a first power, a second electrode connected to an anode of the organic light emitting diode, and a gate electrode connected to an output terminal of the threshold circuit, where the second transistor controls a current amount that flows to the organic light emitting diode from the first power based on the output signal of the threshold circuit. | 01-15-2015 |
20150054718 | PIXEL CIRCUIT AND DISPLAY DEVICE USING THE SAME - Exemplary embodiments of the present invention relates to a pixel circuit for displaying an image of uniform luminance. The pixel circuit comprising an organic light emitting diode (OLED), an RS trigger comprising a first terminal connected to a scan line, a second terminal connected to an enable line, and a third terminal connected to a data line, the RS trigger configured to generate an output signal according to an enable signal, a data signal, and a scan signal respectively received via the enable line, the data line, and the scan line, and a driving transistor comprising a first electrode connected to a first power source, a second electrode connected to an anode of the OLED, and a gate electrode connected to an output terminal of the RS trigger, the driver transistor configured to control a current flowing through the OLED in response to the output signal of the RS trigger. | 02-26-2015 |
20150054862 | DISPLAY DEVICE AND DRIVING METHOD THEREOF - A display device includes a timing controller for controlling the display of an image. The timing controller forms a frame for an image signal based on a main frame, a compensation frame, and at least one blank frame. The timing controller also determines a driving method for the display pixels to generate output image data. The main frame serves to display the image signal. The compensation frame serves to compensate luminance of the main frame. The blank frame serves to express a black gray scale value. | 02-26-2015 |
20150070341 | PIXEL CIRCUIT, ORGANIC LIGHT EMITTING DISPLAY DEVICE HAVING THE SAME, AND METHOD OF DRIVING AN ORGANIC LIGHT EMITTING DISPLAY DEVICE - A pixel circuit of an organic light emitting display device includes an emission unit, an emission control unit, a current supply unit, and a switch unit. The emission unit emits light based on an emission current. The emission control unit controls an emission operation of the emission unit based on a scan signal and a data signal. The current supply unit adjusts the emission current based on a current sinking operation performed based on an external constant current source, where the current supply unit is connected to the external constant current source. The switch unit controls an electrical connection operation between the emission control unit and the current supply unit. | 03-12-2015 |