A light emitting display device can include a display panel configured to display an image, a driver configured to drive the display panel, and a power supply configured to supply a high-level voltage to a first power line of the display panel. Also, the power supply includes a voltage controller configured to receive, from the driver, a vertical synchronization signal and current amount information of the high-level voltage for driving of the display panel, and boost the high-level voltage to be supplied to the display panel during a vertical blank period, based on the vertical synchronization signal and the current amount information of the high-level voltage.

A display device includes a display panel and the display panel includes a pixel. The pixel includes a light emitting unit including at least one light emitting element, a driving transistor providing a driving current corresponding to a data signal to the light emitting unit, and a first transistor electrically connected between both ends of the light emitting unit. A driver provides the data signal to the pixel and provides a duty control signal to the first transistor. The driver varies a voltage level of the data signal in a first grayscale section in which a grayscale corresponding to the data signal is greater than or equal to a reference grayscale, and varies a duty ratio of the duty control signal in a second grayscale section in which the grayscale is less than the reference grayscale.

A display device includes: a substrate including a first pixel region, at least one second pixel region having a smaller area than the first pixel region, the at least one second pixel region being disposed adjacent to the first pixel region, and a peripheral region surrounding the first pixel region and the second pixel region; first and second pixels respectively provided in the first and second pixel regions; first and second lines respectively connected to the first and second pixels; a dummy line connected to one of the first and second lines to extend to the peripheral region; and a first dummy part including a dummy pixel connected to the dummy line in the peripheral region.

A power voltage generator includes a charge pump and a regulator. The charge pump generates a charge pumping voltage. The charge pumping voltage has a headroom margin which is automatically set. The charge pumping voltage is varied based on a target voltage. The regulator generates a power voltage based on the charge pumping voltage.

A pixel circuit includes an input circuit and a time control circuit. The input circuit is configured to output a driving signal to an element to be driven. The time control circuit is configured to control a light-emitting duration of the element in a light-emitting phase to be a first duration by controlling the input circuit coupled thereto in response to a first control signal from a first control signal terminal, and control the light-emitting duration in another light-emitting phase to be a second duration by controlling the input circuit in response to a second control signal from a second control signal terminal and a third control signal from a third control signal terminal. The second duration is less than the first duration. The second duration includes interval time periods. The third control signal has a frequency multiple times that of the first control signal or the second control signal.

A micro LED display panel and a pixel driving circuit thereof. The pixel driving circuit is used for driving a light-emitting unit, which includes a plurality of micro LEDs connected in series. The pixel driving circuit includes a switch unit, a driving unit and a selection unit. The switch unit controls a data signal input according to a scan signal. The driving unit is electrically connected to the switch unit and the light-emitting unit, and is electrically connected to a first voltage. The selection unit receives a selection signal and is electrically connected to a second voltage. The selection unit is electrically connected to the micro LEDs and the driving unit. The number and brightness of the micro LEDs to be turned on are controlled by the selection unit and the driving unit according to the selection signal and the data signal.

A pixel including: a light emitting diode; a first capacitor connected between first and second nodes; a second capacitor connected between the second node and a third node; a first transistor including a first electrode connected to the second node, a second electrode connected to an anode of the light emitting diode, and a gate electrode connected to the first node; a second transistor including a first electrode connected to the third node, a second electrode connected to a reference voltage line, and a gate electrode connected to a first scan line; a third transistor including a first electrode electrically connected to the first node, a second electrode connected to the reference voltage line, and a gate electrode connected to a second scan line; and a fourth transistor including a first electrode connected to a data line, a second electrode connected to the third node, and a gate electrode connected to a third scan line.

Provided are a display panel, a driving method thereof and a display device. The display panel includes a pixel circuit and a light-emitting element. The pixel circuit includes a data write module, a drive module and a compensation module. The data write module is configured to selectively provide a data signal for the drive module. The drive module is configured to provide a drive current for the light-emitting element and includes a drive transistor. The compensation module is configured to compensate for the threshold voltage of the drive transistor. The operation of the pixel circuit includes a bias stage. During the bias stage, the data write module and the drive module are on, the compensation module is off, and the data signal is written to the drain of the drive transistor to adjust the bias state of the drive transistor.

An array substrate is provided. A first virtual line and a second virtual line respectively cross over a first voltage supply line, a second voltage supply line, and a third voltage supply line. The first voltage supply line, the second voltage supply line, and the third voltage supply line respectively include a first voltage supply line portion, a second voltage supply line portion, and a third voltage supply line portion, respectively between the first virtual line and the second virtual line. An orthographic projection of a third anode of a third light emitting element on a base substrate completely covers an orthographic projection of the third voltage supply line portion on the base substrate. The third voltage supply line portion has a line width greater than a line width of the first voltage supply line portion, and greater than a line width of the second voltage supply line portion.

A method to generate pixel control signal more rapidly and with less overhead is disclosed. The method generates pixel control signals for a block of pixels having a first pixel and a second pixel. A base control signal that is shared by the block of pixels is generated. A first sharpening control signal for the first pixel is generated and a second sharpening control signal for the second pixel is generated. The first pixel control signal is generated using the first sharpening signal and the base control signal. The second pixel control signal is generated using the second sharpening signal and the base control signal. The base control signal is stored in a first memory cell; the first sharpener control signal is stored in a second memory cell; and the second sharpener control signal is stored in a third memory cell.