A display device inspection method includes: checking connection failures of light emitting elements included in a pixel and connected in series based on a first control signal, a second control signal, and a voltage of an initialization power source, wherein the pixel comprises: a pixel circuit controlling a current flowing from a first power source to a second node in response to a voltage of a first node; a first light emitting element connected to the second node; a first transistor controlling the voltage of the initialization power source supplied to the second node; a second light emitting element electrically connected between the first light emitting element and a second power source; and a second transistor having a first electrode connected to a third node between the first light emitting element and the second light emitting element, and a gate electrode connected to a first inspection control line.

It is an object to provide a liquid crystal display device which has excellent viewing angle characteristics and higher quality. The present invention has a pixel including a first switch, a second switch, a third switch, a first resistor, a second resistor, a first liquid crystal element, and a second liquid crystal element. A pixel electrode of the first liquid crystal element is electrically connected to a signal line through the first switch. The pixel electrode of the first liquid crystal element is electrically connected to a pixel electrode of the second liquid crystal element through the second switch and the first resistor. The pixel electrode of the second liquid crystal element is electrically connected to a Cs line through the third switch and the second resistor. A common electrode of the first liquid crystal element is electrically connected to a common electrode of the second liquid crystal element.

A diode having a simple structure and a simple manufacturing method of the diode are provided. A diode including: a semiconductor layer having a first region and a second region having a resistance lower than a resistance of the first region; a first insulating layer having a first aperture portion and a second aperture portion and covering the semiconductor layer other than the first aperture and the second aperture, the first aperture portion exposing the semiconductor layer in the first region, the second aperture portion exposing the semiconductor layer in the second region; a first conductive layer connected to the semiconductor layer in the first aperture portion and overlapping with the semiconductor layer in the first region via the first insulating layer in a planar view; and a second conductive layer connected to the semiconductor layer in the second aperture.

A pixel circuit operates to output a high drive current for high-current display applications by operating the drive transistor in the triode region. To maintain operation of the drive transistor in the triode region in a stable manner, the source-drain voltage dependence of the output current of the drive transistor is compensated with a bias transistor, which keeps the drain voltage of the drive transistor constant at a target drain voltage. The bias transistor is controlled by an operational amplifier (Opamp) running a negative feedback loop to ensure a fixed target voltage occurs at the drain of the drive transistor. To configure the negative feedback loop, the Opamp output terminal is connected to the gate of the bias transistor, with the negative terminal being connected to the drain of the drive transistor and the positive terminal being connected to a voltage supply line that supplies the target voltage.

A display substrate and a display device are provided. The display substrate includes a plurality of driving circuits, wherein each of the driving circuits includes: a first sub-circuit, respectively coupled to a gate signal terminal, a data signal terminal and a light-emitting power source terminal, and configured to store a drive voltage based on a voltage at the data signal terminal when the gate signal terminal receives a gate drive signal, and output a drive current to a light-emitting device based on the stored drive voltage under power supply provided by the light-emitting power source terminal; and a second sub-circuit, configured to regulate an equivalent resistance value of the second sub-circuit in an output path through which the drive current is output to the light-emitting device, based on a voltage division control signal received by the voltage division control signal terminal.

It is an object to provide a liquid crystal display device which has excellent viewing angle characteristics and higher quality. The present invention has a pixel including a first switch, a second switch, a third switch, a first resistor, a second resistor, a first liquid crystal element, and a second liquid crystal element. A pixel electrode of the first liquid crystal element is electrically connected to a signal line through the first switch. The pixel electrode of the first liquid crystal element is electrically connected to a pixel electrode of the second liquid crystal element through the second switch and the first resistor. The pixel electrode of the second liquid crystal element is electrically connected to a Cs line through the third switch and the second resistor. A common electrode of the first liquid crystal element is electrically connected to a common electrode of the second liquid crystal element.

A pixel driving circuit includes a driving transistor connected in series between a first power supply voltage terminal and a second power supply voltage terminal. The driving transistor has a control terminal electrically connected to a first node, a first terminal electrically connected to a second node, and a second terminal electrically connected to a third node. The second node is located between the first power supply voltage terminal and the driving transistor. The third node is located between the second power supply voltage terminal and the driving transistor. A light-emitting element is connected in series between the third node and the second power supply voltage terminal. A voltage maintaining module is configured to maintain a voltage of the third node unchanged.

A pixel driving circuit includes a driving transistor connected in series between a first power supply voltage terminal and a second power supply voltage terminal. The driving transistor has a control terminal electrically connected to a first node, a first terminal electrically connected to a second node, and a second terminal electrically connected to a third node. The second node is located between the first power supply voltage terminal and the driving transistor. The third node is located between the second power supply voltage terminal and the driving transistor. A light-emitting element is connected in series between the third node and the second power supply voltage terminal. A voltage maintaining module is configured to maintain a voltage of the third node unchanged.

A display device inspection method includes: checking connection failures of light emitting elements included in a pixel and connected in series based on a first control signal, a second control signal, and a voltage of an initialization power source, wherein the pixel comprises: a pixel circuit controlling a current flowing from a first power source to a second node in response to a voltage of a first node; a first light emitting element connected to the second node; a first transistor controlling the voltage of the initialization power source supplied to the second node; a second light emitting element electrically connected between the first light emitting element and a second power source; and a second transistor having a first electrode connected to a third node between the first light emitting element and the second light emitting element, and a gate electrode connected to a first inspection control line.

It is an object to provide a liquid crystal display device which has excellent viewing angle characteristics and higher quality. The present invention has a pixel including a first switch, a second switch, a third switch, a first resistor, a second resistor, a first liquid crystal element, and a second liquid crystal element. A pixel electrode of the first liquid crystal element is electrically connected to a signal line through the first switch. The pixel electrode of the first liquid crystal element is electrically connected to a pixel electrode of the second liquid crystal element through the second switch and the first resistor. The pixel electrode of the second liquid crystal element is electrically connected to a Cs line through the third switch and the second resistor. A common electrode of the first liquid crystal element is electrically connected to a common electrode of the second liquid crystal element.