Abstract: An electroluminescent (EL) display apparatus and manufacturing method are provided. A display screen includes gate signal lines which are arranged to intersect source signal lines. A pixel corresponds to each intersection of the gate signal lines and the source signal lines. Each pixel includes: an EL device; a driving transistor to supply a current to the EL device; a first switch transistor through which the current is supplied by the driving transistor to the EL device; a second switch transistor provided to supply, to the driving transistor, an image signal supplied to a corresponding one of the source signal lines; a third switch transistor provided between a gate terminal and a drain terminal of the driving transistor; and a capacitor connected to the gate terminal of the driving transistor for holding the image signal. The third switch transistor has a multi-gate structure.

Abstract: By a drive method, for each of a plurality of display pixels each including an EL element, a capacitor, a drive transistor, an enable switch, and a switch, a period T21 is started by switching only the enable switch to an electrically conductive state before a period T22 in which the drive transistor is initialized, and the period T22 following the period T21 is started by switching the switch to an electrically conductive state. The period T21 is longer than a period T24 in which a threshold voltage of the drive transistor is compensated.

Abstract: A display device comprising pixel circuits arranged in a matrix, in which each of the pixel circuits includes: an EL element; a capacitor for storing voltage; a drive transistor that provides, to the EL element, a current corresponding to the voltage stored in the capacitor to cause the EL element to emit light; a voltage supplier that applies a reference voltage to the drive transistor in an initialization period, and applies a reverse bias voltage to the drive transistor in a predetermined period before the initialization period, the reference voltage being higher than a threshold voltage of the drive transistor and providing a forward bias between the gate and source electrodes of the drive transistor, the initialization period being a period for initializing the pixel circuit, the reverse bias voltage providing a reverse bias between the gate and source electrodes of the drive transistor.

Abstract: Pixel circuits each include a write transistor having a gate electrode connected to a write control line, one of a drain electrode and a source electrode connected to a data line for transmitting data voltage corresponding to luminance of the pixel circuit, and the other of the drain electrode and the source electrode connected to a gate electrode of a drive transistor. A compensation circuit includes a compensation transistor connected to a compensation signal line and the write control line. A compensation voltage generation circuit outputs compensation control voltage in accordance with a representative value of data voltage for the pixel circuits. A capacitance of the write control line caused by the compensation transistor and a capacitance of the write control line caused by the write transistors of the pixel circuits have mutually opposite voltage dependence with respect to the representative value of the data voltage for the pixel circuits.

Abstract: An organic EL display includes: a sub-pixel and a sub-pixel arranged adjacent to each other and each including a driving transistor; and a power supply line for supplying a power supply voltage to the driving transistor of the sub-pixel and the driving transistor of the sub-pixel, the power supply line being disposed at a boundary between the sub-pixel and the sub-pixel. The driving transistor of the sub-pixel and the driving transistor of the sub-pixel are oriented in a same direction.

Abstract: A display device includes a plurality of pixels arranged in rows and columns, a plurality of first power lines that extend in a pixel column direction and through which a power supply voltage is supplied to the pixels, and a plurality of second power lines that extend in the pixel column direction and through which an initialization voltage different from the power supply voltage is to the pixels. The number of first power lines is greater than the number of second power lines.

Abstract: An active-matrix display device according to the present disclosure includes a plurality of pixels. Each of the pixels includes: a drive transistor disposed on a substrate; and an organic EL element that is caused by the drive transistor to emit light and includes an AM layer disposed above the substrate and a transparent electrode layer disposed above the AM layer. The active-matrix display device further includes: a source line that supplies data to the pixels; and a power supply line that supplies electric power to the pixels. The power supply line is shared by, among the plurality of pixels, two pixels that are adjacent to each other in a second direction that crosses a first direction in which the power supply line is extended. The source line and the AM layer are disposed not to overlap each other in a plan view of the substrate.

Abstract: A plurality of pixel circuits included in a display device each includes: a drive transistor; a capacitor connected to a gate electrode and a source electrode of the drive transistor; a light-emitting element which is driven by the drive transistor; a write transistor having a gate electrode connected to a write control line for transmitting a write signal, one of a drain electrode and a source electrode connected to a data line for transmitting a data voltage corresponding to luminance, and the other of the drain electrode and the source electrode connected to the gate electrode of the drive transistor; and a compensation transistor having a gate electrode connected to the data line, and at least one of a drain electrode and a source electrode connected to the write control line, the compensation transistor being of same conductivity type as the write transistor.

Abstract: An image display apparatus includes: a first pixel circuit including a driving transistor that drives a light emitting element and includes a gate electrode on a substrate, a semiconductor layer and a pair of source-drain electrodes; a second pixel circuit disposed adjacent to the first pixel circuit; a second pixel electrode that is formed above the second pixel circuit and is electrically connected to one of the pair of source-drain electrodes of the driving transistor of the first pixel circuit; and a top metal electrode that is electrically connected to one of the pair of source-drain electrodes and is formed to cover at least an entire channel region of the semiconductor layer from above.

Abstract: An EL display apparatus according to the present invention includes EL device adapted to emit light at a luminance corresponding to a current fed thereto. A source driver outputs a current higher than a current corresponding to an image signal to the EL device through a source signal line. This operation charges/discharges a parasitic capacitance present in the source signal line. A transistor formed between the EL device and the source driver operates so that the EL device is fed with the current for only a part of a one-frame period. As a result, the El device emits light for only the part of the period.

Abstract: An EL display apparatus according to the present invention includes an EL device adapted to emit light at a luminance corresponding to a current fed thereto. A source driver outputs a current higher than a current corresponding to an analog video signal to the EL device through a source signal line. This operation charges/discharges a parasitic capacitance present in the source signal line. A second gate driver circuit controls a transistor formed between the EL device and the source driver to operate so that the EL device is fed with the current for only a part of a one-frame period. As a result, the El device emits light for only the part of the period.

Abstract: An electroluminescent (EL) display apparatus and manufacturing method are provided. A display screen includes gate signal lines which are arranged to intersect source signal lines. A pixel corresponds to each intersection of the gate signal lines and the source signal lines. Each pixel includes: an EL device; a driving transistor to supply a current to the EL device; a first switch transistor through which the current is supplied by the driving transistor to the EL device; a second switch transistor provided to supply, to the driving transistor, an image signal supplied to a corresponding one of the source signal lines; a third switch transistor provided between a gate terminal and a drain terminal of the driving transistor; and a capacitor connected to the gate terminal of the driving transistor for holding the image signal. The third switch transistor has a multi-gate structure.

Abstract: An electroluminescent (EL) display apparatus and corresponding method of control are provided. A display screen includes pixels arranged in a matrix. A pixel circuit of each of the pixels includes, in part: a second switch transistor to supply, to a driving transistor, an image signal; and a third switch transistor for initially resetting the pixel circuit before the second switch transistor supplies the image signal. A gate terminal of the second switch transistor and a gate terminal of the third switch transistor are connected to a second gate driver circuit. The second gate driver circuit includes a first gate driver circuit and a second gate driver circuit. The second gate driver circuit includes a second gate signal line connected to both the gate terminal of the second switch transistor of a Nth row and the gate terminal of the third switch transistor of a (N+1)th row.

Abstract: An electroluminescent (EL) display apparatus and corresponding method of control are provided. A display screen includes gate signal lines which are arranged to intersect source signal lines. A pixel provided with an EL device corresponds to each intersection of the gate signal lines and the source signal lines. A driving transistor is provided for each pixel to supply a current to the EL device. A first switch transistor is provided for each pixel on a current path through which the current is supplied to the EL device. A gate driver circuit is connected to the gate signal lines. The gate driver circuit is configured to turn the first switch transistor on and off to simultaneously generate band-shaped non-display regions and band-shaped display regions on the display screen and to move the non-display regions and the display regions relative to the display screen.

Abstract: An image display apparatus includes: a first pixel circuit including a driving transistor that drives a light emitting element and includes a gate electrode on a substrate, a semiconductor layer and a pair of source-drain electrodes; a second pixel circuit disposed adjacent to the first pixel circuit; a second pixel electrode that is formed above the second pixel circuit and is electrically connected to one of the pair of source-drain electrodes of the driving transistor of the first pixel circuit; and a top metal electrode that is electrically connected to one of the pair of source-drain electrodes and is formed to cover at least an entire channel region of the semiconductor layer from above.

Abstract: A power off method of a display device includes: detecting a power off operation on the display device; setting, when the power off operation is detected, a same potential in one electrode and an other electrode of a capacitance element in each of a plurality of pixel circuits; and stopping power supply to a display panel immediately after the same potential is set.

Abstract: Pixel circuits of a display device each include: a drive transistor including one of a source and drain connected to a power source line; a capacitive element including a first terminal connected to a gate of the drive transistor; a switching element which switches conduction/non-conduction between a second terminal of the capacitive element and a data line; a switching element which switches conduction/non-conduction between the second terminal of the capacitive element and the source of the drive transistor; a switching element which switches conduction/non-conduction between the first terminal of the capacitive element and a reference voltage line; a light-emitting element including a first terminal connected to the other of the source and drain of the drive transistor and a second terminal connected to another power source line. The reference voltage line provides a forward bias voltage larger than a threshold voltage across the gate and source of the drive transistor.

Abstract: A method for powering off a display apparatus includes: detecting a power-off operation input to a display apparatus; upon detection of the power-off operation, setting capacitive elements of a plurality of pixel circuits so as to have a black-level voltage; and stopping supply of power to a display panel immediately after the voltage is set.

Abstract: A shift register includes unit circuits connected in a cascade, and each of the unit circuits includes a logic circuit, a first output unit, and a second output unit. The first output unit is a buffer amplifier for outputting a driving signal and includes: a first transistor for outputting a first voltage; and a second transistor for outputting a second voltage lower than the first voltage. The second output unit is a buffer amplifier for outputting a signal to a next unit circuit in the cascade and includes: a third transistor for outputting a third voltage; and a fourth transistor for outputting a fourth voltage lower than the third voltage. The second voltage is set at a potential higher than the fourth voltage.

Abstract: A power off method of a display device includes: detecting a power off operation on the display device; setting, when the power off operation is detected, a voltage for suppressing electrical stress on a drive transistor, in a capacitance element in each of a plurality of pixel circuits; and stopping power supply to a display panel immediately after the voltage is set.