A display panel and a display device, including: a driving backplane, including a substrate, one or more driving circuits arranged in an array on the substrate, and one or more positive pads arranged on a side of the driving circuits facing away from the substrate; one or more pixel islands on the driving backplane, the pixel island including one or more first sub-pixels; one or more first electrode pad sets between the pixel islands and the driving backplane, and an orthographic projection of a first electrode pad set on the substrate being located in an orthographic projection of a corresponding pixel island on the substrate; the first electrode pad set including one or more first electrode pads, and the first electrode pads being bonded and connected to the positive pads.

This specification discloses a light emitting devices with electrical pads improving performance. The electrical pads are disposed under the dies to prevent hot spots from occurring, particularly under the peak luminance areas of shaped luminance dies. The electrical pads may have asymmetric n and p areas, with the larger of the areas being disposed under the peak luminance area while the gap between the n and p areas do not overlap the peak luminance area. The electrical pads of different dies are bridged by horizontal or diagonal connections between the dies.

This specification discloses a light emitting devices with electrical pads improving performance. The electrical pads are disposed under the dies to prevent hot spots from occurring, particularly under the peak luminance areas of shaped luminance dies. The electrical pads may have asymmetric n and p areas, with the larger of the areas being disposed under the peak luminance area while the gap between the n and p areas do not overlap the peak luminance area. The electrical pads of different dies are bridged by horizontal or diagonal connections between the dies.

A display region of a display panel includes first power signal lines and second power signal lines which are electrically connected, the first power signal lines extend in a first direction and are arranged in a second direction, and the second power signal lines extend in the second direction and are arranged in the first direction; where the first direction intersects the second direction. A non-display region of the display panel includes a first power bus line, and the first power signal lines are electrically connected to the first power bus line. The first power signal lines and the second power signal lines are electrically connected, and among two second power signal lines, a voltage in a second power signal line facing the first power bus line is different from a voltage in a second power signal line facing away from the first power bus line.

A display region of a display panel includes first power signal lines and second power signal lines which are electrically connected, the first power signal lines extend in a first direction and are arranged in a second direction, and the second power signal lines extend in the second direction and are arranged in the first direction; where the first direction intersects the second direction. A non-display region of the display panel includes a first power bus line, and the first power signal lines are electrically connected to the first power bus line. The first power signal lines and the second power signal lines are electrically connected, and among two second power signal lines, a voltage in a second power signal line facing the first power bus line is different from a voltage in a second power signal line facing away from the first power bus line.

A display device includes a bank layer disposed on a substrate and defining a light-emitting area and a sub-area, a first electrode and a second electrode spaced apart from each other and extending from the light-emitting area to the sub-area, a plurality of light-emitting elements disposed on the first electrode and the second electrode in the light-emitting area, a plurality of dummy light-emitting elements disposed on the first electrode and the second electrode in the sub-area, a first connection electrode in electrical contact with an end of each of the plurality of light-emitting elements, and a second connection electrode in electrical contact with another end of each of the plurality of light-emitting elements. The sub-area includes an isolation area in which each of the first electrode and the second electrode is disconnected, and the plurality of dummy light-emitting elements are not disposed in the isolation area.

A display device includes a bank layer disposed on a substrate and defining a light-emitting area and a sub-area, a first electrode and a second electrode spaced apart from each other and extending from the light-emitting area to the sub-area, a plurality of light-emitting elements disposed on the first electrode and the second electrode in the light-emitting area, a plurality of dummy light-emitting elements disposed on the first electrode and the second electrode in the sub-area, a first connection electrode in electrical contact with an end of each of the plurality of light-emitting elements, and a second connection electrode in electrical contact with another end of each of the plurality of light-emitting elements. The sub-area includes an isolation area in which each of the first electrode and the second electrode is disconnected, and the plurality of dummy light-emitting elements are not disposed in the isolation area.

The invention relates to an optoelectronic device including a control circuit, a pixel comprising a photodetector, a light-emitting diode, and an intermediate region interposed between the photodetector and the light-emitting diode. The photodetector is sensitive to a detection wavelength .sub.2. The light-emitting diode comprises an active stack with a cutoff wavelength Ac shorter than .sub.2 and a buried electrode interposed between an interconnection stack of the circuit and the active stack, and covers a detection surface of the photodetector. The device furthermore comprises a via passing right through the active stack and extending as far as the interconnection stack; an electrical contact passing right through the active stack, in contact with the buried electrode; an electrical path electrically connecting the buried electrode to the control circuit and including the electrical through-contact and the via. The intermediate region is devoid of metal and the buried electrode is transparent to .sub.2.

A light-emitting element extending in one direction includes: a semiconductor core including a main body extending in the one direction, a first end connected to one side of the main body and having an inclined side surface, and a second end connected to an other side of the main body and having a width less than that of the main body; and an insulation film around at least a portion of the outer surface of the semiconductor core, wherein the insulation film includes a first insulation film around the first end of the semiconductor core; and a second insulation film around the second end of the semiconductor core, wherein the diameter of an outer surface of the first insulation film is the same as a diameter of an outer surface of the second insulation film.

The display device can include a substrate, an uneven layer on the substrate, an insulating layer on the uneven layer, and a plurality of semiconductor light emitting devices on the insulating layer. The semiconductor light emitting device can include one of a lateral-type semiconductor light emitting device and a flip-chip type semiconductor light emitting device. The upper surface of the uneven layer has roughness, and the size of the uneven layer is greater than the size of the semiconductor light emitting device.

The embodiment can secure uniform light intensity according to the color viewing angle. In the embodiment, since irregularities are not formed on the lower side of the semiconductor light emitting device, poor adhesion between the semiconductor light emitting device and the substrate can be prevented, reliability can be increased by preventing transfer defect detection errors due to irregularities, and transfer defects can be prevented.