摘要:
The present invention is applied to flat display apparatuses using organic EL devices. Switching circuits implemented by a set of transistors TR1 and TR2 that perform on/off operations in a complementary manner form a series circuit, an output of the connection midpoint of the series circuit is output to an inverter circuit 33, an input signal IN is input to one end of the series circuit, and a signal that is output from an inverter circuit 34 and that corresponds to the output of the connection midpoint of the series circuit is supplied to an opposite end of the series circuit.
摘要:
An active matrix display device includes a driving section provided on a substrate, an insulating film stacked on the substrate, and light-emitting elements arranged in a matrix on the insulating film, and each of the light-emitting elements includes an light-emitting layer between its upper and lower electrodes, the active matrix display device being driven by the driving section provided for each of the light-emitting elements, the active matrix display device also including a first wiring required to cause the light-emitting element to emit light, and a second wiring disposed in the underlying layer of the first wiring via the insulating film, the second wiring also required to cause the light-emitting element to emit light, wherein the first or second wiring is branched into a plurality of wirings at the intersection between the two wirings.
摘要:
A drive section sequentially supplies respective scanning lines with a control signal and supplies respective signal lines with a video signal to carry out a correction operation for holding a voltage equivalent to a threshold voltage of a drive transistor in a holding capacitance, and subsequently performs a write operation for writing the video signal in the holding capacitance, and before the correction operation, the drive section switches potentials at the bias line and adds a coupling voltage to one current terminal of the drive transistor via an auxiliary capacitance to carry out a preparation operation for an initialization to set a potential difference between a control terminal and the one current terminal of the drive transistor larger than the threshold voltage.
摘要:
A display apparatus includes a pixel unit in which pixels are arranged in a matrix pattern; and a driving circuit for driving the pixel unit. Each of the pixels includes a signal level holding capacitor; a first transistor that is turned on/off in response to a writing signal and via which one end of the signal level holding capacitor is connected to a signal line; a second transistor having one end of the signal level holding capacitor connected to a gate thereof and the other end of the signal level holding capacitor connected to a source thereof; a current-driven self-light-emitting element whose cathode is held at a cathode potential and whose anode is connected to the source of the second transistor; a third transistor that is turned on/off in response to a driving pulse signal; and a fourth transistor that is turned on/off in response to a control signal.
摘要:
A display device is disclosed. The display device includes: a pixel array unit and a driving unit which drives the pixel array unit. The pixel array unit includes rows of first scanning lines and second scanning lines, columns of signals, pixels in a matrix state arranged at portions where the scanning lines and the signal lines cross each other and power supply lines and ground lines supplying power to respective pixels. The driving unit includes a first scanner performing line-sequential scanning to pixels by each row by supplying a first control signal to each first scanning line sequentially, a second scanner supplying a second control signal to each second scanning line sequentially so as to correspond to the line-sequential scanning and a signal selector supplying a video signal to rows of signal lines so as to correspond to the line-sequential scanning.
摘要:
An object of the present invention is to suppress a picture defect such as a vertical streak, a ghost or the like on an active matrix display apparatus of a divided sample and hold type.A horizontal driving circuit (17) sequentially generates sampling pulses of which sampling pulses supplied to sampling switches (23) connected to an identical video line (25) do not overlap each other and sampling pulses supplied to adjacent sampling switches (23) overlap each other, and drives the switches, whereby a video signal is sequentially written to pixels (11). A clock generating circuit (18) generates a clock signal HCK serving as a basis for operation of the horizontal driving circuit (17), and a clock signal 2HCK having twice a cycle of the clock signal HCK and twice a pulse width of the clock signal HCK. The horizontal driving circuit (17) includes: a shift register (21) for performing shift operation in synchronism with the clock signal HCK and sequentially outputting shift pulses; and an extracting switch group (22) for extracting the clock signal 2HCK in response to the shift pulses, and sequentially generating the sampling pulses.
摘要:
A pixel circuit having a function of compensating for characteristic variation of an electro-optical element and threshold voltage variation of a transistor is formed from a reduced number of component elements. The pixel circuit includes an electro-optical element, a holding capacitor, and five N-channel thin film transistors including a sampling transistor, a drive transistor, a switching transistor, and first and second detection transistors. The sampling transistor samples and supplies an input signal from a signal line so as to be held into the holding capacitor. The driving transistor drives the electro-optical element with current in response to the held signal potential. The first and second detection transistors detect a threshold voltage of the drive transistor and supply the detected voltage into the holding capacitor in order to cancel an influence of the threshold voltage in advance.
摘要:
A display device includes: a panel in which plural pixels that emit lights according to a video signal are sectioned into plural areas; a light reception sensor that is arranged in each of the areas and outputs a light reception signal according to light emission luminance; and signal processing means. The area includes first and second pixel groups including at least one pixel and plural pixels other than the first pixel group, respectively. The signal processing means includes arithmetic means for outputting an arithmetic signal according to arithmetic operation of an offset value and a light reception value; converting means for outputting digital data according to the arithmetic signal; and correcting means for correcting the video signal according to the digital data and supplying the corrected video signal to the first pixel group.
摘要:
An image display apparatus includes a pixel array section and a drive section configured to drive the pixel array section. The pixel array section is a pixel-circuit matrix with pixel circuits each serving as a matrix element. The drive section has at least a write scanner for supplying the control signal to each of the scan lines in order to carry out a sequential scanning operation on the scan lines for every field and a signal selector for supplying a video signal to each of the signal lines with a timing adjusted to the sequential scanning operation. Each of the pixel circuits employs at least a sampling transistor, a drive transistor, a signal holding capacitor and a light emitting device.