Disclosed are a pixel driving circuit and method, and a display device. The pixel driving circuit includes: the first port of the operation module is electrically connected via the first switch unit to the compensation wire connected to the pixel driving module, the second port of the operation module is electrically connected to the compensation wire through the second switch unit; the first switch unit is configured to transmit the driving data provided by the pixel driving module to the operation module in the self-discharge phase, and the operation module is configured to perform the calculation on the driving data in the self-discharge phase to obtain compensation data; the second switch unit is configured to write the compensation data into the pixel driving module through the compensation wire in the data writing stage.

A display device includes a display panel including a first partial panel region and a second partial panel region, and a panel driver which drives the display panel. The panel driver determines a first driving frequency for the first partial panel region and a second driving frequency for the second partial panel region. In a case where the first driving frequency and the second driving frequency are different from each other, the panel driver sets a boundary portion including a boundary between the first partial panel region and the second partial panel region, and determines a third driving frequency for the boundary portion to be between the first driving frequency and the second driving frequency.

A display device includes a display panel including a first display area; a second display area protruding in a first direction from the first display area; and a first non-display area adjacent to a side of the second display area. Each of the first display area and the second display area includes subpixels that display an image and scan lines electrically connected to the subpixels. The first non-display area includes dummy pixels; a common scan line electrically connected to the dummy pixels; load matching switch elements respectively disposed between the scan lines and the common scan line; and a load matching driving circuit that outputs load matching control signals to control turn-on and turn-off of the load matching switch elements.

Embodiments of the present disclosure are related to a driving circuit and a display device, by applying an initialization voltage to a sensing node between a driving transistor and a light-emitting element and sensing a voltage change of the sensing node according to driving the light-emitting element, a threshold voltage of the light-emitting element can be detected without turning-on the driving transistor. Furthermore, by turning on the driving transistor and falling a voltage of the sensing node before sensing the voltage of the sensing node, a voltage lower than the threshold voltage of the light-emitting element can be sensed and a variation of a characteristic value of the light-emitting element is detected, thus a circuit for sensing the characteristic value of the light-emitting element can be implemented easily.

An image display system includes a graphic processor which generates an image signal, a control signal, and a variable frequency signal; and a display device which displays an image at a frame frequency corresponding to the variable frequency signal from the graphic processor. The display device includes pixels connected to emission control lines, data lines, and scan lines; a controller which provides reference data including information on reference cycles, which are cycles in which an emission control start signal is output, to the graphic processor, outputs the emission control start signal based on the control signal, and adjusting an output timing of a scan start signal based on the variable frequency signal; an emission driver which supplies emission control signals to the emission control lines based on the emission control start signal; and a scan driver which supplies scan signals to the scan lines based on the scan start signal.

A display device includes pixels, and each pixel is connected between a first electrode or a second electrode of a driving transistor and a bias line, includes a bias transistor configured to transfer a bias voltage applied from the bias line to the first electrode or the second electrode of the driving transistor during a bias period. Bias voltages applied to the pixels emitting light of different colors are different from each other.

A display device includes a scan line extending in a direction, a data line and a driving voltage line extending in another direction, a transistor electrically connected to the driving voltage line and including a first gate electrode and a first semiconductor layer, a second transistor electrically connected to the scan and data lines and including a second gate electrode and a second semiconductor layer, a first capacitor electrically connected to the first transistor and including first and second capacitor plates, and a second capacitor including a third capacitor plate electrically connected to the first transistor and a fourth capacitor plate electrically connected to the second transistor. The second capacitor plate includes a first hole overlapping the first capacitor plate, the fourth capacitor plate includes a second hole overlapping the third capacitor plate, and a size of the second hole is different from that of the first hole.

A display device includes pixels, scan lines, and data lines. A first driving gate electrode is disposed at a first pixel of the display device. A second driving gate electrode is disposed at a second pixel of the display device. A first driving voltage line includes a first extending part that overlaps a first driving gate electrode. A second driving voltage line includes a second extending part that overlaps a second driving gate electrode. A first pixel electrode of the first pixel overlaps the second driving gate electrode. The second extending part includes a first recess portion. A center line of the first recess portion is offset in a direction away from the first pixel electrode with respect to a center line of the second driving gate electrode.

A light source apparatus includes a plurality of light source gate lines extending in a first direction, a plurality of light source data lines extending in a second direction crossing the first direction, a plurality of light source emission lines, a plurality of feedback lines and a plurality of light source blocks. At least one of the light source blocks is connected to the light source gate line, the light source data line, the light source emission line and the feedback line.

The display device includes at least one pixel having a first capacitive element having a first terminal and a transistor connected to the first terminal and having a second terminal and a gate electrode. A driving method of the display device including in a first frame, a signal with a first pulse width is supplied to the gate electrode of the transistor, and a first voltage is written from the second terminal to the first terminal. In the second frame after the first frame, a signal with a second pulse width is supplied to the gate electrode, and the first terminal holds the first voltage. In the third frame after the second frame, a signal with a third pulse width is supplied to the gate electrode, and the second voltage is written from the second terminal to the first terminal.