A pixel that emits light at brightness corresponding to the amount of a driving current regardless of a threshold voltage of a driving transistor, and secure sufficient compensation time by separating an operation of compensating for the threshold voltage of the driving transistor and an operation of writing a data signal, and a display apparatus including the pixel.

A pixel circuit includes a data writing sub-circuit and a leakage prevention sub-circuit. The data writing sub-circuit is coupled to a first scan signal terminal, a data signal terminal and a light-emitting control sub-circuit, and is configured to: in a data writing period, store a light-emitting compensation signal in response to a gate scan signal from the first scan signal terminal and a data signal from the data signal terminal; and in a light-emitting period, assist in controlling the light-emitting control sub-circuit to be turned on according to the light-emitting compensation signal. The leakage prevention sub-circuit is coupled to the data writing sub-circuit and an auxiliary voltage terminal that is configured to provide to a constant voltage, and is configured to: in the data writing period, store another light-emitting compensation signal; and in the light-emitting period, inhibit leakage of the data writing sub-circuit according to the another light-emitting compensation signal.

A display device includes a light emitting element including an anode, a cathode, and a light emitting layer between the anode and the cathode, a first transistor connected between the anode and a first power line, the first transistor may be switched by a voltage of a node, a second transistor connected between the first transistor and a data line, the second transistor may be switched by a write scan signal, a third transistor connected between the node and the anode, the third transistor may be switched by a compensation scan signal, a fourth transistor connected between the node and an initialization line, the fourth transistor may be switched by an initialization scan signal, an insulating layer on the first to the fourth transistors, and a light blocking pattern protruding from the insulating layer, the light blocking pattern being adjacent to the third transistor and the fourth transistor.

An electroluminescent device includes a light-emitting element, a drive transistor that supplies a driving current corresponding to a gradation voltage to the light-emitting element, a first conductive layer that is electrically connected to a gate of the drive transistor, and a second conductive layer that is supplied a fixed potential and that is disposed on a same layer as the first conductive layer. The first conductive layer and the second conductive layer are disposed apart and electrically insulated from one another, and in plan view, the first conductive layer is surrounded by the second conductive layer.

An image display system includes a graphic processor which generates an image signal, a control signal, and a variable frequency signal; and a display device which displays an image at a frame frequency corresponding to the variable frequency signal from the graphic processor. The display device includes pixels connected to emission control lines, data lines, and scan lines; a controller which provides reference data including information on reference cycles, which are cycles in which an emission control start signal is output, to the graphic processor, outputs the emission control start signal based on the control signal, and adjusting an output timing of a scan start signal based on the variable frequency signal; an emission driver which supplies emission control signals to the emission control lines based on the emission control start signal; and a scan driver which supplies scan signals to the scan lines based on the scan start signal.

A display device includes a scan line extending in a direction, a data line and a driving voltage line extending in another direction, a transistor electrically connected to the driving voltage line and including a first gate electrode and a first semiconductor layer, a second transistor electrically connected to the scan and data lines and including a second gate electrode and a second semiconductor layer, a first capacitor electrically connected to the first transistor and including first and second capacitor plates, and a second capacitor including a third capacitor plate electrically connected to the first transistor and a fourth capacitor plate electrically connected to the second transistor. The second capacitor plate includes a first hole overlapping the first capacitor plate, the fourth capacitor plate includes a second hole overlapping the third capacitor plate, and a size of the second hole is different from that of the first hole.

A display device includes: a pixel unit having a plurality of pixels; a timing controller supplying respective scan start signals to a plurality of scan drivers and an emission start signal to an emission driver, in response to synchronization signals supplied from the outside; the emission driver supplying an emission signal to emission control lines connected to the pixels based on the emission start signal; the scan drivers supplying scan signals to the scan lines connected to the pixels based on the scan start signal; and a data driver supplying a data signal to data lines connected to the pixels, and at least one of a frequency of the emission start signal and frequencies of the scan start signals may be a first frequency that is determined independently of a driving frequency when the driving frequency is less than or equal to a threshold value.

A display device and electronic device are disclosed. In one example, a display device includes a pixel array portion including pixels arrayed in a matrix having a row direction and a column direction. The pixels each respectively including a light emission unit. A fixed potential line surrounds the pixel array portion in a frame portion outside the pixel array portion, and a pixel portion auxiliary cable is arranged to extend across the pixel array portion. The pixel portion auxiliary cable is interlayer connected to the fixed potential line at a location in the frame portion outside the pixel array portion.

A pixel driving circuit includes: an energy storage sub-circuit, a reset sub-circuit, a compensation sub-circuit, a driving sub-circuit, and a current leakage suppression sub-circuit. The energy storage sub-circuit is coupled to a first node and a second node. The reset sub-circuit is coupled to the second node, a first scan timing signal terminal, and an initialization signal terminal. The compensation sub-circuit is coupled to the second node, a third node, and a second scan timing signal terminal. The driving sub-circuit is coupled to the second node, the third node, and a first voltage signal terminal. The current leakage suppression sub-circuit is coupled to the energy storage sub-circuit, the reset sub-circuit, and the compensation sub-circuit. The current leakage suppression sub-circuit is configured to suppress current leakage of the energy storage sub-circuit in a process of generating and transmitting the driving signal by the driving sub-circuit.

A pixel includes a first capacitor connected between first and second nodes, a second capacitor connected between a first voltage line and the first node, a light emitting diode including a first electrode and a second electrode connected with a second voltage line, a first transistor including a first electrode, a second electrode, and a gate electrode connected with the second node, a second transistor including a first electrode, a second electrode, and a gate electrode which receives a scan signal, a third transistor including a first electrode, a second electrode, and a gate electrode which receives a first compensation scan signal, a fourth transistor including a first electrode, a second electrode, and a gate electrode which receives a second compensation scan signal, and a fifth transistor including a first electrode, a second electrode, and a gate electrode which receives a first light emitting signal.