Display device and electronic device including the same

A display device comprising:

• a substrate including a plurality of pixel circuit regions;
• a circuit element layer disposed on the substrate, the circuit element layer including a plurality of semiconductor layers, a plurality of conductive layers, and a plurality of insulating layers which are stacked in a thickness direction, the circuit element layer including a plurality of pixel circuits disposed in the plurality of pixel circuit regions, respectively;
• and
• a light emitting element layer disposed on the circuit element layer, the light emitting element layer including a plurality of light emitting elements connected to the plurality of pixel circuits, respectively,
• wherein each of the pixel circuits includes a plurality of transistors and at least one capacitor,
• wherein the insulating layers included in the circuit element layer include a plurality of inorganic insulating layers and at least one organic insulating layer disposed on the inorganic insulating layers,
• wherein a plurality of contact holes, which penetrate at least one of the inorganic insulating layers, are defined, and
• wherein a ratio (%) of a sum of areas of channel regions of the transistors in one pixel circuit region of the pixel circuit regions to an area of the one pixel circuit region is in a range of 10 or more and 30 or less.

An electronic device comprising:

• a display device displaying an image and including:
• a substrate including a plurality of pixel circuit regions;
• a circuit element layer disposed on the substrate, the circuit element layer including a plurality of semiconductor layers, a plurality of conductive layers, and a plurality of insulating layers which are stacked in a thickness direction, the circuit element layer including a plurality of pixel circuits disposed in the plurality of pixel circuit regions, respectively;
• and
• a light emitting element layer disposed on the circuit element layer, the light emitting element layer including a plurality of light emitting elements connected to the plurality of pixel circuits, respectively;
• and
• one or more processors configured to provide input image data and an input control signal to the display device,
• wherein each of the pixel circuits includes a plurality of transistors and at least one capacitor,
• wherein the insulating layers included in the circuit element layer include a plurality of inorganic insulating layers and at least one organic insulating layer disposed on the inorganic insulating layers,
• wherein a plurality of contact holes, which penetrate at least one of the inorganic insulating layers, are defined, and
• wherein a ratio (%) of a sum of areas of the contact holes in one pixel circuit region of the pixel circuit regions to an area of the one pixel circuit region is in a range of 8 or more and 98 or less.