A display driving device for driving a display panel, including a gate line, a data line intersecting with the gate line, and a pixel defined by the gate line and the data line, includes a data driver inputting an image signal to the pixel through the data line, a panel test unit determining the occurrence or not of an error of the gate line or the data line, and a switching unit selectively connecting the data driver or the panel test unit to the display panel.

A display module includes a display panel in which a plurality of pixels each including a plurality of sub-pixels are disposed on a plurality of row lines; and a driver. The driver is configured to set a PWM data voltage to the plurality of sub-pixels included in the plurality of row lines in a row line sequence, apply a sweep signal, which is a voltage signal sweeping between two different voltages, to sub-pixels among the plurality of sub-pixels that are included in at least some consecutive row lines among the plurality of row lines in the row line sequence, and drive the display panel to cause the sub-pixels included in the at least some consecutive row lines to emit light based on the PWM data voltage in the row line sequence.

To provide a semiconductor device, a liquid crystal display device, and an electronic device which have a wide viewing angle and in which the number of manufacturing steps, the number of masks, and manufacturing cost are reduced compared with a conventional one. The liquid crystal display device includes a first electrode formed over an entire surface of one side of a substrate; a first insulating film formed over the first electrode; a thin film transistor formed over the first insulating film; a second insulating film formed over the thin film transistor; a second electrode formed over the second insulating film and having a plurality of openings; and a liquid crystal over the second electrode. The liquid crystal is controlled by an electric field between the first electrode and the second electrode.

Driving a LED array includes determining total charge to be transferred to the LEDs during an image frame, and determining a number of drive pulses of equal width and amplitude that would drive the LEDs with nearly the total charge during display of the image frame. One of the drive pulses is modified so the drive pulses drive the LEDs with the total charge during display. If the width is greater than a minimum width and less than a maximum width, the LEDs are driven with the drive pulses. If the width is less than the minimum width and if an amplitude is greater than a minimum amplitude, the amplitude of the drive pulses is decremented. If the width is less than the minimum width and if the amplitude is equal to the minimum amplitude and if the number of drive pulses is greater than one, the number is decremented.

An organic light emitting display device includes a display area and a non-display area. The display area includes display pixels at crossing areas of data lines, scan lines, and emission control lines. The non-display area includes auxiliary pixels at crossing positions of auxiliary data lines, scan lines, and emission control lines. The display device also includes a scan driver to supply scan signals to the scan lines, a first data driver to supply data voltages to the data lines, a second data driver to supply an auxiliary data voltage to the auxiliary data line, and a demultiplexer between the data lines and the first data driver.

The present invention reliably and sufficiently corrects a voltage variation in data signal lines in a display device resulting when sampling analog video signals, while suppressing increase in layout area. In a data signal line drive circuit of an active matrix liquid crystal display device, a video signal Svi is sampled by an Nch transistor (SWk) which has a parasitic capacitance (Cgd) that causes a voltage drop in a data signal line SL3(i−1)+k (i=1 through n; k=1, 2, 3). To correct this, an inversion delayer (342) makes logical inversion of the transistor (SWk)'s control signal Sck and delays the inverted signal for a predetermined time to generate an inversion delayed signal Srdk, and applies this inversion delayed signal Srd to the data signal line 3(i−1)+k via a correction capacitance element (Cc). The inversion delayer (342) makes the inversion delayed signal Srdk start its change from an L level voltage to a H level voltage after the Nch transistor (SWk) has assumed an OFF state.

In a matrix device having two or more systems of electrode groups such as X and Y systems, the one or more electrode groups are grouped into groups each consisting of a plurality of pixel electrodes, connection wires are branched off and connected to the pixel electrodes so that the same signal is not supplied to the pixel electrodes of the same group but the same signal is supplied to one pixel electrode of two or more groups, switching elements are provided corresponding to the individual pixel electrodes, and a gate electrode and a gate insulating film of the switching elements are used in common in the same group. Accordingly, in the matrix device and manufacturing of the matrix device, the number of connection wires and driver ICs is reduced.

An electro-optical device includes one or more control lines that include a scanning line, a data line and a pixel circuit. The pixel circuit has a drive transistor, a write-in transistor with a gate which is electrically connected to the scanning line, a light-emitting element that emits light at a brightness that depends on the size of a current that is supplied through the drive transistor, and a control line which overlaps the gate of the drive transistor when viewed from a direction that is perpendicular to a surface of a substrate on which the pixel circuit is formed is included in the one or more control lines.

The present disclosure provides an LED display device. The LED display device divides each of LED modules into a plurality of unit blocks. In each of the unit blocks, a display controller transmits image data to be processed in parallel to the corresponding data driver at the same time, and transmits logic signals to the corresponding gate driver, thereby driving the corresponding data driver and then turning on the corresponding LEDs. Therefore, the speed processing the image data of each unit block can be improved, to enhance the visual refresh rate.

A method for charging a pixel and an enlarged pixel of the display device and a display device are provided. The enlarged pixel has a storage capacitance greater than a storage capacitance of the pixel, and the method includes charging the enlarged pixel in a greater amount of time than charging the pixel. Therefore, according to the display device of the disclosure, an image sensing unit may be configured under the enlarged pixel so as to implement an image sense function under a screen.