According to one embodiment, a display device includes a display region where pixels are arranged. Each of the pixels includes a pixel electrode, a light emitting element, a drive transistor, a first capacitance electrode layer opposed to the pixel electrode and held at a constant potential, and an insulating layer forming an auxiliary capacitance together with the pixel electrode and the first capacitance electrode layer. A value of the auxiliary capacitance of the first pixel, of the values of the auxiliary capacitance of the pixels is the largest.

The organic light emitting display device is driven to be divided into a refresh frame when the data voltage is programmed in the pixel and a reset frame when the anode electrode of the organic light emitting diode is reset, and the data voltage is maintained to a first level during the reset frame. Accordingly, a separate stage for applying an on bias stress is not provided so that the bezel may be reduced.

An electro-optical device is provided with a plurality of data lines, a plurality of potential lines supplied with a predetermined potential, a driving transistor controlling a current level according to the voltage between the gate and the source, a first storage capacitor which holds the voltage between the gate and a source of the driving transistor, and a light-emitting element. One data line among the plurality of data lines and one potential line among the plurality of potential lines are arranged to be adjacent to each other, and a second storage capacitor holding the potential of the one data line is formed by the one data line and the one potential line.

The present disclosure relates to a power supply device including a gate driving circuit configured to supply gate signals to a plurality of gate lines, a first power supply circuit configured to supply a first initialization voltage having a voltage level between a first voltage level and a second voltage level to a plurality of first initialization power lines, the first initialization voltage having the first voltage level in a first period, a third voltage level between the first and second voltage levels in a second period, and the second voltage level in a third period, and a second power supply circuit configured to supply a driving voltage to a plurality of driving power lines among the plurality of power lines, and a display device including the power supply device.

An electro-optical device is provided with a plurality of data lines, a plurality of potential lines supplied with a predetermined potential, a driving transistor controlling a current level according to the voltage between the gate and the source, a first storage capacitor which holds the voltage between the gate and a source of the driving transistor, and a light-emitting element. One data line among the plurality of data lines and one potential line among the plurality of potential lines are arranged to be adjacent to each other, and a second storage capacitor holding the potential of the one data line is formed by the one data line and the one potential line.

A pixel includes a switching transistor transmitting a data voltage to a first node, a storage capacitor electrically connected between a first power supply line and the first node and storing the data voltage, first and second driving transistors electrically connected to the first power supply line, the first node, and a second node, and first and second light emitting elements electrically connected between the second node and a second power supply line. An anode of the first light emitting element and a cathode of the second light emitting element are electrically connected to the second node, a cathode of the first light emitting element and an anode of the second light emitting element are electrically connected to the second power supply line, the first driving transistor is a P-type transistor, and the second driving transistor is an N-type transistor.

A display device includes a pixel. The pixel includes an emission unit and a pixel circuit. The pixel circuit to provide a first driving current to the emission unit in a first current flowing direction in a first mode, and to provide a second driving current to the emission unit in a second current flowing direction different from the first current flowing direction in a second mode. The emission unit includes a first electrode and a second electrode spaced from each other, a first light emitting element connected between the first electrode and the second electrode in the first current flowing direction, and a second light emitting element connected between the first electrode and the second electrode in the second current flowing direction.

Display devices and actuators and other components for a display device are provided. Display devices are provided configured to alter an optical property by moving an amount of a first fluid through which light can pass. In some aspects, the first fluid is movable within a cavity by varying an amount of pressure on the cavity; and the display includes a means of varying the amount of pressure. The means can include an actuator. An actuator is provided that has a first cavity containing fluid and bounded at least in part by a first elastomer; a second cavity containing fluid and bounded at least in by part by a second elastomer; a channel connecting the first cavity to the second cavity; and a valve configured to be electrically operated into an open state or a closed state and thereby allow or block flow of the fluid through the channel.

A display may have an array of pixels each of which has a light-emitting diode such as an organic light-emitting diode. A drive transistor and an emission transistor may be coupled in series with the light-emitting diode of each pixel between a positive power supply and a ground power supply. The pixels may include first and second switching transistors. A data storage capacitor may be coupled between a gate and source of the drive transistor in each pixel. Signal lines may be provided in columns of pixels to route signals such as data signals, sensed drive currents from the drive transistors, and predetermined voltages between display driver circuitry and the pixels. The switching transistors, emission transistors, and drive transistors may include semiconducting-oxide transistors and silicon transistors and may be n-channel transistors or p-channel transistors.

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. An input signal is sampled from a signal line so as to be held in a holding capacitor. The threshold voltage of the drive transistor is imparted to the holding capacitor in order to cancel an influence of the threshold voltage.