An electro-optical device includes one or more control lines that include a scanning line, a data line and a pixel circuit. The pixel circuit has a drive transistor, a write-in transistor with a gate which is electrically connected to the scanning line, a light-emitting element that emits light at a brightness that depends on the size of a current that is supplied through the drive transistor, and a control line which overlaps the gate of the drive transistor when viewed from a direction that is perpendicular to a surface of a substrate on which the pixel circuit is formed is included in the one or more control lines.

A display panel includes: a substrate including a main display area, a first component area, a second component area, and a peripheral area; a first subpixel on the main display area, and a first pixel circuit connected to the first subpixel; a second subpixel on the first component area; a second pixel circuit spaced apart from the second subpixel; and a connection wiring connecting the second subpixel to the second pixel circuit.

A display panel includes: a substrate including a main display area, a first component area, a second component area, and a peripheral area; a first subpixel on the main display area, and a first pixel circuit connected to the first subpixel; a second subpixel on the first component area; a second pixel circuit spaced apart from the second subpixel; and a connection wiring connecting the second subpixel to the second pixel circuit.

A display substrate and a display apparatus are disclosed. The display substrate includes a display region and a peripheral region, the peripheral region includes a circuit region, and the display region includes a plurality of sub-pixels, a plurality of data lines extending along a first direction and a plurality of gate lines extending along a second direction crossing the first direction. The circuit region includes a plurality of driving unit groups. The circuit region includes a first sub-region and a second sub-region that are opposite to each other at two sides of the display region along the first direction, the first sub-region includes a plurality of multiplexing unit groups and the second sub-region includes a plurality of test unit groups.

A display substrate and a display apparatus are disclosed. The display substrate includes a display region and a peripheral region, the peripheral region includes a circuit region, and the display region includes a plurality of sub-pixels, a plurality of data lines extending along a first direction and a plurality of gate lines extending along a second direction crossing the first direction. The circuit region includes a plurality of driving unit groups. The circuit region includes a first sub-region and a second sub-region that are opposite to each other at two sides of the display region along the first direction, the first sub-region includes a plurality of multiplexing unit groups and the second sub-region includes a plurality of test unit groups.

An organic EL device (100D) according to an embodiment of the present invention has: a substrate (1); a drive circuit layer (2) having a plurality of TFTs formed on the substrate; interlayer insulation layers (2Pa, 2Pb) formed on the drive circuit layer; an organic EL element layer (3) formed on the interlayer insulation layers; and a thin-film sealing structure (10DE) formed so as to cover the organic EL element layer. The interlayer insulation layers have contact holes (CH1, CH2). Contact parts (C1, C2) that connect the drive circuit layer and the organic EL element layer are formed inside the contact holes. The surface (2Pb_Sb) of the interlayer insulation layers and the surface (C_Sb) of the contact parts are flush, and the arithmetic average roughness Ra of the surfaces are 50 nm or less.

An organic EL device (100D) according to an embodiment of the present invention has: a substrate (1); a drive circuit layer (2) having a plurality of TFTs formed on the substrate; interlayer insulation layers (2Pa, 2Pb) formed on the drive circuit layer; an organic EL element layer (3) formed on the interlayer insulation layers; and a thin-film sealing structure (10DE) formed so as to cover the organic EL element layer. The interlayer insulation layers have contact holes (CH1, CH2). Contact parts (C1, C2) that connect the drive circuit layer and the organic EL element layer are formed inside the contact holes. The surface (2Pb_Sb) of the interlayer insulation layers and the surface (C_Sb) of the contact parts are flush, and the arithmetic average roughness Ra of the surfaces are 50 nm or less.

A display device includes: a base substrate including an opening area, an opening peripheral area, and a display area at least partially surrounding the opening peripheral area, wherein the opening peripheral area is a non-display area at least partially surrounding the opening area; a thin film transistor disposed on the base substrate in the display area; a via insulating layer disposed on the thin film transistor and having a first opening surrounding the opening area, wherein the first opening is in the opening peripheral area; a pixel defining layer disposed on the via insulating layer and having a first opening which overlaps the first opening of the via insulating layer; a transparent filler disposed on the base substrate in the opening area; and a sealing substrate disposed on the transparent filler.

A display device includes: a base substrate including an opening area, an opening peripheral area, and a display area at least partially surrounding the opening peripheral area, wherein the opening peripheral area is a non-display area at least partially surrounding the opening area; a thin film transistor disposed on the base substrate in the display area; a via insulating layer disposed on the thin film transistor and having a first opening surrounding the opening area, wherein the first opening is in the opening peripheral area; a pixel defining layer disposed on the via insulating layer and having a first opening which overlaps the first opening of the via insulating layer; a transparent filler disposed on the base substrate in the opening area; and a sealing substrate disposed on the transparent filler.

A display device includes a substrate including a display area and a non-display area around the display area. A pixel is disposed on the display area. A first dam is disposed on the non-display area. The first dam includes a first sub-dam and a second sub-dam disposed on the first sub-dam. A first power line is disposed on the non-display area and passes between the first sub-dam and the second sub-dam. The first power line is connected to the pixel. A bridge pattern is disposed under the first sub-dam. The bridge pattern is connected to the first power line.