Abstract: A method for driving a display device includes driving a first pixel circuit based on first and second fields of a frame, and driving a second pixel circuit based on first and second fields of the frame. The first field of the first pixel circuit overlaps the second field of the second pixel circuit. The second field of the first pixel circuit overlaps the first field of the second pixel circuit. Operations performed in the first field include storing a gray scale data voltage, and operations performed in the second field include supplying an amount of current to a light emitter based on the stored gray scale data voltage. The first and second pixel circuits are in adjacent rows of the display device.

Abstract: A pixel circuit including a light emitting element outputting a gray scale based on a current supplied thereto, a first transistor configured to control an amount of current supplied to the light emitting element based on a gray scale data voltage supplied to a gate electrode of the first transistor, a second transistor connected between the gate electrode of the first transistor and an initialization voltage, a third transistor connected between the gate electrode of the first transistor and a first terminal of the first transistor; a fourth transistor connected between the first terminal of the first transistor and the light emitting element, and a fifth transistor connected between a second terminal of the first transistor and a data line. The data line is selectively supplied with the gray scale data voltage and a power supply voltage for light emitting of the light emitting element to the fifth transistor.

Abstract: A pixel circuit includes a first transistor coupled to a light emitting element, a first capacitor coupled to the first transistor, a second transistor coupled to the first capacitor, a third transistor coupled between the second transistor and a data line; and a second capacitor having a first electrode coupled between the second and third transistors. The first transistor controls an amount of current supplied to the light emitting element based on a first data voltage while a second data voltage is stored in the second capacitor. The first data voltage is stored in the first capacitor.

Abstract: A display device includes a driving transistor in a pixel circuit. A signal line is connected to a source or drain of the driving transistor. The source or drain of the driving transistor receives a power source voltage, an initialization voltage, and a data voltage through the signal line during different periods of operation. The periods of operation include a emission and non-emission periods.

Abstract: A pixel circuit includes a driving transistor connected to a light-emitting element and capacitor connected to a gate of the driving transistor. A threshold voltage of the driving transistor is compensated during a first period based on a first voltage derived from a power supply voltage. The gate of the driving transistor is set to a second voltage during a second period, where the second voltage is derived from a data voltage stored in the capacitor. The second period includes a data program period. An operation of the pixel circuit in the first period is performed independently from an operation of the pixel circuit in the data program period. Accordingly, threshold voltage compensation and data program operations are performed in separate periods based on different voltages supplied to the driving transistor.

Abstract: A pixel circuit is provided which includes a light-emitting element; a driving transistor configured to control an amount of current supplied from a first power line to the light-emitting element according to a pixel voltage; a capacitor having one end connected to a second power line and the other end connected to a gate of the driving transistor and configured to hold the pixel voltage; a first switch transistor configured to selectively switch the pixel voltage provided through a data signal line into the capacitor; and a second switch transistor configured to selectively connect the first power line and the second power line. The first and second power lines are separated during a period where the capacitor is charged by the pixel voltage, and are shorted during a period where the driving transistor operates according to the pixel voltage.

Abstract: A display device includes a pixel circuit having a driving transistor for driving a light-emitting element based on a gradation voltage held by a holding capacitor. The display device performs a first writing of gradation data using a first initialization voltage and a second writing of the gradation data using a second initialization voltage.

Abstract: An amplifier circuit includes an operational amplifier having first and second input nodes and one output node which is connected to a data line for which a pixel is provided; a feedback circuit having first and second elements which are connected to one of the first and second input nodes at their one ends; and a first switch section. The first switch section switches an operation mode between a first drive mode in which the other end of the first element is connected to the output node and a second drive mode in which the other end of the second element is connected to the output node.

Abstract: A method is provided for driving a liquid crystal display panel including first and second data line sets each including an even number of arrayed data lines, and a plurality of pixels sharing a common electrode having a constant potential. The method is composed of: time-divisionally selecting data lines from each of the first and second data line sets; and providing data signals on the selected data lines to write the data signals into the pixels therethrough. An order of selecting the data lines from each of the first and second data lines and polarities of the data signals written into the pixels are determined so that polarities of the data signals on the data lines selected from the first data line set are opposite to those of the data lines selected from the second data line set.

Abstract: A display panel driver is composed of a grayscale voltage generator configured to develop a set of different grayscale voltages corresponding to grayscale levels of pixels within a display panel; and a plurality of grayscale selector driver circuits each of which is responsive to pixel data to select one of the grayscale voltages, and to provide a drive voltage corresponding to the selected one of the grayscale voltages for a selected pixel within the display panel. The grayscale voltage generator is allowed to output the set of grayscale voltages during a first period within a horizontal period, and prohibited from outputting the set of grayscale voltages during a second period within the horizontal period.

Abstract: A method of operating a liquid crystal display device includes: (A) time-divisionally driving pixels in a certain line of an LCD panel so that pixels adjacent in a horizontal direction are driven with data signals of opposite polarities. The (A) step includes: (A1) generating a first data signal of a first polarity on a first output terminal of a driver, and then driving a first pixel out of said pixels in the certain line through electrically connecting the first output terminal to the first pixel; and (A2) generating a second data signal of the first polarity on the first output terminal and then driving a second pixel out of said pixels in the certain line through electrically connecting the first output terminal to the second pixel, in succession to the drive of the first pixel.

Abstract: A liquid crystal display apparatus is composed of an LCD panel including data lines, and an LCD driver. The LCD driver includes: a positive drive circuit providing a positive data signal having positive polarity with respect to a ground level of the LCD driver for one of the data lines; and a negative drive circuit providing a negative data signal having negative polarity with respect to the ground level of the LCD driver for another one of the data lines.

Abstract: A method is provided for driving a liquid crystal display panel in which each pixel includes a plurality of sub-pixels arranged in a specific direction, the method including feeding drive voltages to sub-pixels within the liquid crystal display panel by using operational amplifiers. The polarities of the drive voltages fed to each of the sub-pixels are inverted between two adjacent frame periods. The offset polarities of the operational amplifiers are inverted for every a predetermined number of successive sub-pixels. The number of the sub-pixels within each pixel is coprime to the predetermined number of successive sub-pixels.

Abstract: A driving circuit for a display apparatus includes a common line driver that supplies at least two different common voltages to a common line included in the display apparatus, a plurality of data line drivers that supply a data voltage to each of a plurality of data lines included in the display apparatus, and a switch section that has a larger operating voltage range than that of the data line drivers and temporarily short-circuits the common line and the data line.

Abstract: An amplifier circuit includes an operational amplifier having first and second input nodes and one output node which is connected to a data line for which a pixel is provided; a feedback circuit having first and second elements which are connected to one of the first and second input nodes at their one ends; and a first switch section. The first switch section switches an operation mode between a first drive mode in which the other end of the first element is connected to the output node and a second drive mode in which the other end of the second element is connected to the output node.

Abstract: A method of operating a liquid crystal display device includes: (A) time-divisionally driving pixels in a certain line of an LCD panel so that pixels adjacent in a horizontal direction are driven with data signals of opposite polarities. The (A) step includes: (A1) generating a first data signal of a first polarity on a first output terminal of a driver, and then driving a first pixel out of said pixels in the certain line through electrically connecting the first output terminal to the first pixel; and (A2) generating a second data signal of the first polarity on the first output terminal and then driving a second pixel out of said pixels in the certain line through electrically connecting the first output terminal to the second pixel, in succession to the drive of the first pixel.

Abstract: A drive circuit includes a logic section having a data bus and a display memory circuit and configured to read out a plurality of gradation data from the display memory circuit through the data bus and to collectively output the plurality of gradation data as display pixel data; and a drive section configured to drive a display unit based on analog gradation signals which are generated based on the display pixel data outputted from the logic section. The drive circuit further includes a power supply circuit configured to supply at least one of first and second power supply voltages to the logic section and the drive section. The logic section, the drive section and the power supply circuit may be formed in a same semiconductor chip.

Abstract: A display device is provided with a display controller, a source driver, and a liquid crystal panel, and two pairs of wirings are provided between the display controller and the source driver. The display controller is provided with a V-I conversion circuit for image data and a mode register, and the source driver is provided with an I-V conversion circuit for image data. The V-I conversion circuit for image data connects either one of a pair of the wirings to an earth electrode and sets the other one to a floating state based on the image data. The I-V conversion circuit for image data allows electric current to flow in the wiring out of a pair of the wirings, which is connected to the earth electrode, and converts the image data into a pair of complementary current signals to receive them. Further, the I-V conversion circuit for image data stops the current signal by a control signal from the mode register when the image data is not transmitted.

Abstract: A display device is provided with a display controller, a source driver, and a liquid crystal panel, and two pairs of wirings are provided between the display controller and the source driver. The display controller is provided with a V-I conversion circuit for image data and a mode register, and the source driver is provided with an I-V conversion circuit for image data. The V-I conversion circuit for image data connects either one of a pair of the wirings to an earth electrode and sets the other one to a floating state based on the image data. The I-V conversion circuit for image data allows electric current to flow in the wiring out of a pair of the wirings, which is connected to the earth electrode, and converts the image data into a pair of complementary current signals to receive them. Further, the I-V conversion circuit for image data stops the current signal by a control signal from the mode register when the image data is not transmitted.

Abstract: In a driver for driving a color-type display apparatus capable of displaying a partial display area of a display panel, where each pixel is formed by at least three color dots, a partial image memory is adapted to store video data for each pixel of the partial display area, and a color designating circuit is adapted to designate a color of letters of the partial display area designated by the video data.