A display device includes a pixel array unit in which display elements constituting pixels are arranged in a two-dimensional matrix in a row direction and a column direction. Each of the display elements includes a current-driven light-emitting unit and a drive circuit for driving the light-emitting unit. The drive circuit includes at least a write transistor for writing a video signal and a drive transistor for applying current to the light-emitting unit. A voltage is supplied to a back gate of at least the write transistor via a back gate line provided separate from a power supply line that supplies a voltage to the drive transistor.

An electronic device is disclosed that includes a display layer, a display driver, a sensor layer on the display layer, and a sensor driver that drives the sensor layer. The display layer includes a scan line, a data line, an emission control line. The display driver drives the display layer and provides signals to the scan, data, and emission control lines. The sensor layer operates in a first sensing mode driven at a first sensing frequency or in a second sensing mode driven at a second sensing frequency different from the first sensing frequency. When the sensor layer operates in the first sensing mode, the display driver outputs a first emission control signal to the emission control line. When the sensor layer operates in the second sensing mode, the display driver provides the emission control line with a second emission control signal having a second waveform that is different from a first waveform of the first emission control signal.

A display device including a display panel including pixels, a data driver configured to apply a data voltage to the pixels, a sensing driver configured to receive a sensing voltage from the pixels, a gate driver configured to apply a gate signal to the pixels, and a driving controller configured to control the gate driver, the sensing driver, and the data driver. The sensing driver generates leakage sensing data for current leakage characteristic of the pixels based on the sensing voltage received in a first sensing period, and generates threshold voltage sensing data for a threshold voltage of a driving transistor of the pixels based on the sensing voltage received in a second sensing period.

This application relates to display panels, methods of driving the same, and display devices. The display panel includes: a first pixel circuit and a demultiplexing circuit. The first pixel circuit includes a first reset circuit, a first data writing circuit, and a first drive circuit. A first terminal of the first reset circuit is connected to a first terminal of the first drive circuit. A second terminal of the first reset circuit is connected to a first multiplexing signal line. A control terminal of the first drive circuit is connected to a first terminal of the first data writing circuit. A second terminal of the first data writing circuit is connected to the first multiplexing signal line. The demultiplexing circuit includes a first control circuit and a second control circuit. A first terminal of the first control circuit is connected to the first multiplexing signal line. A second terminal of the first control circuit is used for receiving a reset signal. A first terminal of the second control circuit is connected to the first multiplexing signal line. A second terminal of the second control circuit is used for receiving a first data signal.

A display panel includes a pixel circuit and a light-emitting element. The pixel circuit includes a data-writing module, a driving module, and a compensation module. The driving module is configured to provide a driving current for the light-emitting element, wherein the driving module includes a driving transistor, and the driving transistor is an NMOS transistor. The data-writing module is configured to selectively provide a data signal for the driving module. The compensation module is configured to compensate a threshold voltage of the driving transistor. An operational process of the pixel circuit includes a bias stage. In the bias stage, the compensation module is turned off, the driving transistor receives a bias signal, and the bias signal is configured to adjust a bias state of the driving transistor.

This document describes systems and techniques for delaying anode voltage reset for quicker response times in organic light-emitting diode (OLED) displays. In an aspect, a pixel circuit includes a transistor electrically connected to an anode of an organic light-emitting diode and a reset voltage. Upon receiving an anode reset signal, the transistor completes the circuit causing the anode voltage to reset to the reset voltage in an anode voltage reset process. Delaying anode voltage reset can hasten response times in OLED displays.

Provided is a display device. The display device includes a display panel that includes a first display region and a second display region, a data driving circuit configured to drive a plurality of data lines, a scan driving circuit configured to drive a plurality of scan lines, and a driving controller configured to control the data driving circuit and the scan driving circuit so as to operate the first display region and the second display region at different frequencies when an operation mode is a multi-frequency mode, wherein the driving controller changes the operation mode to a normal mode when a difference between an image signal of a current frame of the first display region and an image signal of a previous frame of the first display region is equal to or greater than a reference value during the multi-frequency mode.

A display device includes a display panel including a pixel and a panel driver which drives the display panel at a first panel frequency in a first driving mode and drives the display panel at a second panel frequency in a second driving mode. The pixel includes a light emitting element and first, second, third, and fourth transistors. The first transistor is connected between a power line and the light emitting element. The second transistor is connected between a data line and the first transistor and receives a first scan signal. The third transistor is connected between the first transistor and an initialization voltage line and receives a second scan signal. The fourth transistor is connected between the first transistor and a reset voltage line and receives a third scan signal. The third scan signal is inactivated in the first driving mode and is activated in the second driving mode.

A light emitting display (LED) device can include a display panel configured to display an image; and a data driver including a panel driving circuit configured to drive the display panel and a panel sensing circuit configured to sense a condition of the display panel, in which the panel driving circuit includes a first data voltage output circuit to output a voltage to both of a first data line and a first reference line of the display panel to display black on a first sub-pixel included in the display panel.

A pixel circuit includes an organic EL element configured to emit light, a capacitor configured to hold a data voltage, a drive transistor with a data gate connected to one electrode of the capacitor, and a diode connection transistor connected between a source of the drive transistor and the organic EL element. A source of the diode connection transistor is connected to a back gate of the drive transistor. In a case where a channel length of the drive transistor is taken as L.sub.1, a channel length of the diode connection transistor is taken as L.sub.2, a ratio of a channel width to a channel length of the drive transistor is taken as (W/L).sub.1, and a ratio of a channel width to a channel length of the diode connection transistor is taken as (W/L).sub.2, a relation of L.sub.1<L.sub.2 and a relation of (W/L).sub.1<(W/L).sub.2 are satisfied.