An OLED display device includes display panel and a panel driver. The panel driver receives input image data at an input frame frequency and determines whether the input image data represent a still image. When the input image data do not represent the still image, the panel driver drives the display panel at a first output frame frequency substantially equal to the input frame frequency. When the input image data represent the still image, the panel driver drives the display panel at a second output frame frequency lower than the input frame frequency for a low frequency driving time and drives the display panel at a third output frame frequency higher than the second output frame frequency for a high frequency insertion time determined by one of a panel characteristic of the display panel and a representative gray level of the input image data, after the low frequency driving time.

A display device including: first pixels connected to a first write line and a first compensation line; second pixels connected to a second write line and a second compensation line; third pixels connected to a third write line and a third compensation line; fourth pixels connected to a fourth write line and a fourth compensation line; fifth pixels connected to a fifth write line and a fifth compensation line; sixth pixels connected to a sixth write line and a sixth compensation line; seventh pixels connected to a seventh write line and a seventh compensation line; and eighth pixels connected to an eighth write line and an eighth compensation line, the first to fourth compensation lines are connected to a first node, the fifth and sixth compensation lines are connected to a second node, the seventh and eighth compensation lines are connected to a third node.

A method of determining a model for pixel power consumption for each pixel in a display of a device displaying each color in a color space is disclosed which includes establishing a color space for the display, decomposing the color space into a plurality of subgrids, measuring the pixel power associated with a selected set of colors in each subgrid of the plurality of subgrids, establishing a pixel power model for each subgrid of the plurality of subgrids by applying a function to the power values at the selected set of colors in that subgrid, and deriving a piecewise pixel power model for the entire color space which includes pixel power models for the plurality of subgrids.

A light emitting device comprising a plurality of pixels is provided. Each of the plurality of pixels includes a light emitting element, a first transistor having a drain region connected to the light emitting element, and a second transistor having a drain region connected to a gate electrode of the first transistor. The plurality of pixels include a first pixel and a second pixel, which are adjacent to each other in a first direction. A source region of the second transistor of the first pixel and a source region of the second transistor of the second pixel share one diffusion region, and a source region, a gate electrode, and the drain region of the first transistor of the first and second pixels are sequentially arranged in one of a positive direction and a negative direction in the first direction.

A display device includes a display panel including gate lines and pixels connected to the gate lines, and a gate driver including plural stages providing gate signals to the gate lines. A first stage among the stages includes a node controller including an input terminal and configured to control a voltage of a first control node and a voltage of a second control node, and an output unit connected to a first gate power source line and configured to output a first gate power source voltage of the first gate power source line as a gate signal through an output terminal in response to the voltage of the first control node. The node controller includes a first auxiliary transistor connected in the form of a diode between the input terminal and the second control node and a boosting capacitor connected between the second control node and the output terminal.

A display apparatus capable of improving image quality is provided. In the display apparatus, an adder circuit is provided inside and outside a display region, and the adder circuit has a function of adding a plurality of pieces of data supplied from a source driver. Some components of the adder circuit are separately arranged in a pixel region. Thus, limitation on the size of a component included in the adder circuit can be eased, and data addition can be performed efficiently. In addition, by providing the other components included in the adder circuit outside the display region, the number of wirings in the display region can be reduced and the aperture ratio of the pixel can be increased.

A display system includes a display that has a first display area and a second display area. Each display area includes a plurality of subpixels, and each subpixel includes a light emitting device. A first power system is configured to output a first power supply positive voltage and a first power supply negative voltage to drive subpixels in the first display area. A second power system is configured to output a second power supply positive voltage and a second power supply negative voltage to drive subpixels in the second display area.

A driving circuit includes a first transistor, a second transistor and a third transistor. The first transistor has a first terminal connected to a first voltage level, a second terminal, and a third terminal The second transistor has a first terminal connected to the second terminal of the first transistor, a second terminal connected to a second voltage level, and a third terminal connected to the third terminal of the first transistor. The third transistor has a first terminal connected to the first terminal of the second transistor. The first transistor and the second transistor are low temperature poly-silicon transistors, and the third transistor is an oxide semiconductor transistor.

A novel display apparatus that is highly convenient or reliable is provided. Alternatively, a novel input/output device that is highly convenient or reliable is provided. The display apparatus is configured in the following manner: the periphery of end surfaces of a plurality of display panels is processed by laser light and the display panels are joined together so that unevenness is not generated at a boundary between the adjacent display panels and the outermost surface of the display apparatus is flat.

The present disclosure provides a display panel and a display device. The display panel includes a display area, including a first display area. The first display area includes light non-transmissive areas and light transmissive areas, and sub-pixels in the light non-transmissive areas include a first light-shielding layer, a pixel driving circuit, and a light-emitting structure layer. In a direction perpendicular to a substrate, a projection of the first light-shielding layer covers a projection of the light-emitting structure layer and a projection of at least one transistor of the pixel driving circuit.