A gamma voltage correction method, a gamma voltage correction device, and a display device are provided. The gamma voltage correction method is performed on a final confirmed gamma voltage curve of a current frame period in a display stage of a next frame period. Therefore, changes in a gamma voltage curve of the display device may follow changes in frequency, i.e., the frequency and the gamma voltage curve may be consistent. As a result, a brightness difference of the display device caused by changes in frequency may be reduced and flickering may be prevented.

The present disclosure provides a display device. The display device includes at least one display panel including at least one light-emitting diode (LED) light board, a drive control module connected to the LED light board, and a detecting module respectively connected to the LED light board and the drive control module. The LED light board includes at least one LED. The drive control module is configured to drive the LED of the LED light board to display.

Provided are a pixel having two contacting points and an operating method of the pixel. The pixel includes a positive power terminal and a negative power terminal which are related to power required for driving of a pixel driving circuit unit driving a plurality of light-emitting elements, wherein the positive power terminal is connected to a data driving circuit, and the negative power terminal is connected to a scan driving circuit. The pixel may be driven according to a potential difference between a signal output from the data driving circuit and a signal output from the scan driving circuit.

A pixel circuit, a display substrate, a display panel, and a display device are provided. The pixel circuit includes: a first driving circuit, a second driving circuit, a first light-emitting control circuit, and a second light-emitting control circuit. The first light-emitting control circuit is configured to control a connection between the first driving circuit and the light-emitting element and a connection between the first driving circuit and the first power line to be turned on or off; the second light-emitting control circuit is configured to control a connection between the second driving circuit and the light-emitting element and a connection between the second driving circuit and the second power line to be turned on or off; the first driving circuit and the second driving circuit are configured to control a driving current for driving the light-emitting element to emit light based on the same data voltage.

Disclosed are a gate-on voltage generation circuit, a display panel driving device and a display device. The gate-on voltage generation circuit includes an on/off voltage output terminal, a power management integrated circuit and a voltage switching circuit. The power management integrated circuit includes a detection terminal connected to the on/off voltage output terminal, is configured for detecting a voltage output by the on/off voltage output terminal, and outputting first switch control signal or second switch control signal according to the voltage output from the on/off voltage output terminal. The voltage switching circuit includes a first input terminal for inputting a first voltage value and a second input terminal for inputting a second voltage value larger than the first voltage value. The voltage switching circuit outputs the first voltage value upon receiving the first switch control signal, and outputs the second voltage value upon receiving the second switch control signal.

A power supply device includes: a display power supply circuit that receives a voltage and outputs a power supply at a predetermined voltage to a display; and a voltage switching circuit configured to, when a voltage value of a battery is equal to or higher than a predetermined value, output a first voltage to the display power supply circuit, the first voltage being based on the voltage that the battery outputs, and when a voltage value of the battery is less than the predetermined value, outputs a second voltage higher than the first voltage to the display power supply circuit, the second voltage being based on the voltage that the battery outputs.

A display device includes a voltage generation circuit that generates a plurality of clock signals and a first driving voltage, a second driving voltage, and a third driving voltage. A gate driving circuit receives the generated clock signals and the first driving voltage, the second driving voltage, and the third driving voltage, and includes a plurality of driving stages each of which outputs a carry signal and a gate signal to a corresponding gate line among gate lines. The voltage generation circuit sets a voltage level of the third driving voltage based on a signal of a first node of at least one of the driving stages.

A display device according to an exemplary embodiment includes: a display panel including a plurality of pixels; a plurality of source boards connected to the display panel; a power control board connected to the source board and configured to supply a power voltage to the plurality of pixels; and a control board configured to control an output of voltages supplied to the source board according to a control signal transmitted by the power control board.

A display apparatus includes a display panel, a driving controller, a gate driver, an emission driver and a data driver. The display panel includes a pixel including a driving switching element and a light emitting element. The driving controller is configured to determine a driving frequency varied according to input image data or a driving mode. The gate driver is configured to output a gate signal and a bias control signal to the pixel. The emission driver is configured to output an emission signal to the pixel. The data driver is configured to output a data voltage to the pixel. The bias control signal to apply a bias voltage to the driving switching element has a first width in a writing frame and a second width different from the first width in a holding frame.

A display driving circuit and a display device including the same are provided. The display driving circuit includes a source driver which applies source data to a display panel, a power supply unit which receives an external voltage from a power module to generate an internal voltage and a logic unit which is supplied with the internal voltage to control the source driver, wherein the logic unit includes a voltage variable determination logic which determines whether a supply voltage including the internal voltage and the external voltage is changed, thereby generating a voltage variable signal, and a voltage control logic which receives the voltage variable signal to change the supply voltage.