Abstract: An organic EL display device capable of preventing generation of pseudo contours is provided. Digital data of pixels in one frame is stored in a frame memory, and display is performed according to the stored digital data. One frame is divided into a plurality of unit frames, each of which is divided into a plurality of sub-frames. In each of the sub-frames, display is performed for a bit corresponding to the digital data.

Abstract: A display device which effectively reduces the occurrences of a false contour is provided. A driver digitally drives each pixel by obtaining a plurality of bit data from pixel data for one pixel to assign the plurality of bit data to a corresponding subframe; configuring one frame with a predetermined number of unit frames; and supplying corresponding bit data in each unit frame to each pixel. Specifically, an analyzing circuit 5-5 predicts a probability of occurrence of a false contour in one screen of the video signal based on the presence or absence of a true contour. A display method based on the video signal is set in accordance with an analysis result.

Abstract: A liquid crystal display device for displaying video data includes a liquid crystal panel, a back light for illuminating the liquid crystal panel, an input video data characteristic detection section for detecting a luminance characteristic according to gradation of the inputted video data, and a back light control section for controlling an amount of light of the back light in accordance with the luminance characteristic.

Abstract: In order to efficiently execute threshold value compensation for a driving transistor, a coupling capacitor (6) has one end connected to a data line (8). Another end of the coupling capacitor (6) is connected to a selection transistor (3) and one end of a reset transistor (4). A control terminal of a driving transistor (2) is connected to the other end of the selection transistor (3), and an organic EL element (1) is connected to this driving transistor via a light emission control transistor (5). A data voltage, corresponding to a gradation signal supplied to the data line (8), is written to a storage capacitor (7) via the coupling capacitor (6), and with the selection transistor (3) and the light emission control transistor (5) in an off state and the reset transistor (4) turned on, a compensation voltage corresponding to a degree of mobility of the driving transistor (2) is written to the coupling capacitor (6).

Abstract: A liquid crystal display device for displaying video data having a detection circuit for detecting a luminance distribution based on video data which is inputted, the luminance distribution being indicative of generation frequency of gradations in each of divided region which includes a plurality of gradations. The display device includes a determination circuit for determining at least one of a plurality of divided regions of higher generation frequency of gradation than that of other divided regions based on the luminance distribution, a correction circuit for correcting the video data so as to make a luminance characteristic of the at least one of the plurality of divided regions of higher generation frequency of gradation more abrupt than a luminance characteristic of the other divided regions, and a liquid crystal display panel for displaying the corrected video data. A width of the divided region is changeable.

Abstract: A pixel circuit includes an organic EL element includes a storage capacitor charged with a data voltage; a first driving transistor responsive to charged voltage of the storage capacitor to supply drive current to the organic EL element; and a second driving transistor connected the storage capacitor and a predetermined power supply responsive to potential corresponding to a voltage drop in the organic EL element, and supplies charge current to the storage capacitor, circuitry for causing the second driving transistor to supply charge current to the storage capacitor from a time when the storage capacitor is charged with data voltage and the drive current from first driving transistor flows through the organic EL element. When drive current from the first driving transistor is stopped by changes in the charged voltage of storage capacitor, the drive current supplied to the organic EL element for a period corresponding to the data voltage.

Abstract: An active matrix type display device includes array having pixel circuits arranged in rows and columns matrix form, each pixel circuit includes a current-driven diode type light-emitting element and a plurality of thin-film transistor for controlling the diode type light-emitting element; a data line provided for each column of the matrix for supplying a data signal to the pixel circuits on the corresponding column; data driver for controlling the supply of the data signal to the data line; a gate line provided for each row of the matrix for supplying a selection signal to pixel circuits on the corresponding row; a gate driver for supplying a selection signal to the gate line; and a control circuit for controlling the data driver and gate driver, wherein the data driver switches a plurality of sets of video signals alternately and supplies the video signals to the data line.

Abstract: During image display, pixel current measurement for brightness irregularity correction is carried out. Display is carried out by sequentially writing pixel data in a horizontal direction to pixel sections that are arranged in a matrix shape. Horizontal power supply lines PVDD are arranged for each horizontal line, and power is supplied from these power supply lines to corresponding pixel sections. When carrying out measurement of pixel current by lighting pixel sections one at a time, a horizontal power supply line PVDD of a horizontal line to which the lit pixel belongs is connected to a power supply PVDDb by a switch, and other horizontal power supply lines PVDD are connected to PVDDa.

Abstract: A pixel circuit including a storage capacitor to which data is written including a black level; a second driving transistor supplies a drive current corresponding to data written to the storage capacitor to a second organic electroluminescence element; a first driving transistor supplies to a first organic electroluminescence element drive current that reflects brightness degradation or current degradation in the second organic electroluminescence element, wherein the second driving transistor supplies a predetermined drive current to the second organic electroluminescence element including data of the black level; and the drive voltage of the first driving transistor is set to a voltage reflecting the brightness degradation or current degradation in the second organic electroluminescence element.

Abstract: In order to efficiently execute threshold value compensation for a driving transistor, a coupling capacitor has one end connected to a data line. Another end of the coupling capacitor is connected to a selection transistor and one end of a reset transistor. A control terminal of a driving transistor is connected to the other end of the selection transistor, and an organic EL element is connected to this driving transistor via a light emission control transistor. A data voltage, corresponding to a gradation signal supplied to the data line, is written to a storage capacitor via the coupling capacitor, and with the selection transistor and the light emission control transistor in an off state and the reset transistor turned on, a compensation voltage corresponding to a degree of mobility of the driving transistor is written to the coupling capacitor.

Abstract: An EL light-emitting element is driven digitally to reduce power consumption using a pixel having three transistors and two capacitors. A reset transistor for diode connection writes the threshold voltage of the drive transistor onto a coupling capacitor. The data voltage plus threshold voltage is then written onto the gate of the drive transistor. This reduces the amplitude of the data voltage required, further reducing power consumption.

Abstract: A display device includes a display panel having display elements, arranged in a matrix, a drain driver which supplies gradation voltages corresponding to image data to the display elements, a gate driver which scans lines of the display elements for supplying the gradation voltage, and a data generation circuit which divides image data for one frame into a plurality of pieces of sub-field image data in a time direction. The data generation circuit operates to convert one piece of sub-field image data into bright gradation data which has a higher brightness than the inputted image data which has been inputted, and to convert another piece of sub-field image data into dark gradation data which has a lower brightness than the inputted image data.

Abstract: A display panel which applies a PWM drive to a drive transistor (2) is provided. A drive transistor supplies current in accordance with its gate voltage, and the current is supplied to a light-emitting element (1) to illuminate the light emitting element. One end of a storage capacitor (6) is connected to the gate of the drive transistor, while the other end thereof is connected to a sweep line (12). A triangular wave which alternately repeats an up phase and a down phase is supplied to the sweep line in order to control an on period of the drive transistor in accordance with the gate voltage, to thereby control light emission of the light-emitting element.

Abstract: To reduce the number of sub-frames and perform high resolution display with low power consumption, each of the pixels has a digital emission period Td and an analog emission period Ta, and is driven in a time-divided fashion in a digital manner or in an analog manner. Each of the pixels performs high resolution display when being driven in an analog manner, and performs display with low power consumption when being driven in a digital manner.

Abstract: To efficiently execute threshold value compensation for a driving transistor for an electroluminescent element. A first storage capacitor has a first terminal connected to a data line. A first terminal of a switching transistor and a first terminal of a reset transistor are connected to a second terminal of the first storage capacitor. The first storage capacitor is formed overlapping a data line.

Abstract: To reduce variation in characteristics of a voltage-current conversion circuit for supplying a data signal to a data line for driving a transistor arranged in a pixel of an organic EL display device. Two sets A, B of voltage-current conversion circuits are provided in a data driver for driving a transistor arranged in a pixel, and RGB signals are supplied to these circuits. The voltage-current conversion circuits of sets A and B are controlled so as to be switched for every frame or every frame and line.

Abstract: A display device includes an array having a plurality of pixel circuits arranged in a matrix, each pixel circuit includes a optoelectronic element and a plurality of thin-film transistors for controlling the optoelectronic element; data lines arranged to correspond to columns of pixel circuits for providing data signals to the pixel circuits; a data driver for driving the data lines; select lines for providing select signals for controlling the capture of data signals from the data lines to pixel circuits; and a select driver for driving the select lines including a shift register for sequentially shifting a line select signal, enable circuits for enabling outputs of the shift register, and n (where n is an integer of two or more) enable control lines for controlling the enable circuits, and the enable circuits are connected to the same one of the enable control lines every n lines.

Abstract: A display device in which measurement emissive elements that emit light in accordance with a drive current are arranged in a matrix within a display region, the display device includes a measurement emissive element which is formed in a position different from the display region and formed by the same process as the organic EL elements formed in the display region; drive voltage supply circuit for supplying drive voltage to the measurement emissive element; and drive state detection circuit for detecting the drive state of the measurement emissive element in the case where the drive voltage is supplied by the drive voltage supply circuit.

Abstract: An active matrix display device, including a pixel array with unit pixel provided with at least one memory pixel, having a 1-bit memory, arranged in a matrix formation, including at least one of a gate selection decoder for selecting gate lines of the pixel array, and a data selection decoder for selecting a data line.

Abstract: A display device for performing display by digitally driving pixels, arranged in a matrix arrangement, according to image data of an image signal. A data driver allocates pixel data for a single pixel to corresponding sub-frames as a plurality of bit data, and digitally drives each pixel by providing bit data to each pixel, the bit data having one frame formed from a specified number of unit frames. A timing control circuit divides the image signal into blocks for analysis, analyzes likelihood of occurrence of pseudo contours for each block, and analyzes likelihood of occurrence of pseudo contours for display of a single screen based on analysis results in each block. The timing control circuit then changes display based on the image signal based on analysis results by the timing control circuit.