A liquid crystal display (LCD) and a method for compensating current leakage of the LCD are provided. The LCD includes a thin film transistor (TFT) array having a plurality of TFTs, a gate driver configured to provide a scan signal, a source driver configured to provide a data signal, and a timing controller electrically connected to the gate driver and the source driver. The timing controller is configured to adjust a current refresh frequency according to a current frame rate and to transfer a control signal to the gate driver when the current refresh frequency is lower than a threshold frequency such that the gate driver increase a charging time of the plurality of TFTs according to the control signal.

A pixel capable of adjusting a threshold voltage of a driving transistor, the pixel including: a display element configured to emit light during an emission period and including an anode and a cathode, the first transistor including an upper gate and a lower gate and configured to control a magnitude of a driving current flowing to the display element, a storage capacitor connected to the upper gate of the first transistor, and a second transistor configured to be turned on during a data writing period to transmit a data voltage to the first transistor, wherein a lower gate-source voltage of the first transistor has a first voltage level in the data writing period and a second voltage level in the emission period.

Provided are a pixel driving circuit, a display screen, and a terminal. The pixel driving circuit includes: a data writing path, a light-emitting path, a reset path, and a capacitor. An end of the data writing path is configured to receive to a data voltage, another end of the data writing path is connected to a first node; an end of the light-emitting path is configured to receive a positive voltage of a power supply, and another end of the light-emitting path is configured to receive a negative voltage of the power supply. The reset path includes a first transistor and a second transistor. An end of the capacitor is connected to the positive voltage of the power supply, and another end of the capacitor is connected to the first node.

A pixel includes a capacitor including a first electrode and a second electrode, a first transistor which generates a driving current, a second transistor which applies a data voltage to the first electrode of the capacitor, a third transistor which applies an initialization voltage to the second electrode of the capacitor, a fourth transistor which generates a leakage current in response to a dimming signal, and a light emitting element which emits light based on a residual driving current, where the residual driving current is obtained by subtracting the leakage current from the driving current.

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.

A display device includes: a display panel configured to display an image; a signal controller configured to determine whether an input image signal is a still image signal, and determine color coordinates using data values of one frame data of the input image signal, and generate compensated image data by compensating image data of the one frame data based on the color coordinates; and a data driver configured to generate a data signal based on the compensated image data and output the compensated image data to the display panel through a data line.

A display substrate includes: a pixel circuit including: a switching transistor connected between a first terminal of a compensation capacitor and a data line; and a pixel transistor connected between a second terminal of the compensation capacitor and a first voltage line, the pixel transistor to receive a test voltage; and a test transistor including: a test gate terminal to receive a test signal; a test source terminal electrically connected to the first voltage line; and a test drain terminal electrically connected to the data line.

An organic light emitting display device includes a plurality of pixels. Each of the pixels includes an organic light emitting diode, first to third transistors, a storage capacitor, and a first capacitor. The second transistor includes a gate electrode receiving a first scan signal, a first electrode receiving a data signal, and a second electrode connected to a first electrode of the first transistor. The third transistor includes a gate electrode receiving a second scan signal, a first electrode connected to a second electrode of the first transistor, and a second electrode connected to a gate electrode of the first transistor. The storage capacitor includes a first electrode receiving a power voltage and a second electrode connected to the gate electrode of the first transistor. The first capacitor includes a first electrode connected to the gate electrode of the third transistor and a second electrode receiving the power voltage.

A scan driver includes: a first transistor having a first electrode coupled to an output scan line, a second electrode coupled to a first power line, and a gate electrode coupled to a first node; a second transistor having a first electrode coupled to a first clock line, a second electrode coupled to the output scan line, and a gate electrode coupled to a second node; a third transistor having a first electrode coupled to the first node, a second electrode coupled to a first input scan line, and a gate electrode coupled to a second clock line; and a fourth transistor having a first electrode coupled to the second node and a second electrode and a gate electrode, which are coupled to a second input scan line, wherein the first input scan line and the second input scan line are different from each other.

A display device capable of improving image quality is provided. The display device includes a first circuit, a pixel, and a wiring. The first circuit has a function of supplying data to the wiring and a function of making the wiring floating to hold the data. The pixel has a function of taking in the data twice from the wiring and performing addition. The pixel can perform the first writing of the data in a period during which the data is supplied to the wiring, and can perform the second writing of the data in a period during which the data is held in the wiring. Therefore, by one time of data charging to a source line, a data potential larger than or equal to an output voltage of a source driver can be supplied to a display element.