CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to Japanese Patent Application No. 2019-028728 filed on Feb. 20, 2019, and Japanese Patent Application No. 2019-184963 filed on Oct. 8, 2019, the disclosures of which are hereby incorporated by reference in their entireties.

BACKGROUND

The present disclosure relates to a display device and a method of manufacturing a display device.

A display device that uses micro light-emitting diodes (i.e., micro-LEDs) for pixels has been proposed as described in Japanese Patent Publication No. 2006-140247. This type of display devices in which the pixels are configured as self-luminescent elements provides higher resolution, higher contrast, and higher color reproducibility than display devices with a liquid-crystal panel. Also, typical micro-LEDs are formed of inorganic semiconductor materials, thereby having a longer lifetime than organic electro-luminescence elements, and being less likely to cause burn-in.

In a display device using micro-LEDs, light is extracted from an upper surface of the light-emitting element. In addition, the upper surface, as well as a lower surface of the light-emitting element, is needed to be connected to wirings. Thus, the upper surface of the light-emitting element needs to have both a high electrical-conductivity and a high light transmissivity. As a result, in a production line of the display device with micro-LEDs, mounting of the light-emitting element to a substrate becomes difficult, which increases the manufacturing cost.

SUMMARY

Certain embodiments are made in view of the above-mentioned current situation, and have objects to provide a display device that includes micro-LEDs as pixels and can be manufactured at low cost and a method of manufacturing a display device.

A method of manufacturing a display device according to certain embodiments of the present invention includes: providing a substrate and a light-emitting element, wherein the substrate includes at least one sub-pixel and a first wiring disposed for the at least one sub-pixel, and the light-emitting element includes at least two lateral surfaces intersecting with each other and a lower surface, wherein a first electrode disposed on the lower surface, and a second electrode disposed on the at least two lateral surfaces; mounting the at least one light-emitting element on the substrate and electrically connecting the first electrode to the first wiring; forming a resin member on the substrate, the resin member covering the at least one light-emitting element; exposing a portion of the second electrode from an upper surface of the resin member by removing an upper portion of the resin member; and forming a second wiring with a mesh shape on the resin member such that a portion of the second wiring is disposed on the at least one light-emitting element to electrically connect the second wiring to the second electrode.

A display device according to certain embodiments of the present invention includes a substrate includes at least one sub-pixel, a first wiring disposed for the at least one sub-pixel on the substrate, at least one light-emitting element mounted for the at least one sub-pixel on the substrate, a resin member covering a lower portion of the at least one light-emitting element and the first wiring, and a second wiring with a mesh shape disposed on the resin member such that a portion of the second wiring is disposed on the at least one light-emitting element. The at least one light-emitting element includes a semiconductor having a lower surface and at least two lateral surfaces that intersect with each other, a first electrode disposed on the lower surface and electrically connected to the first wiring, and a second electrode disposed on the at least two lateral surfaces, a portion of the second electrode being exposed from an upper surface of the resin member. The second wiring is electrically connected to the portion of the second electrode that is exposed from the resin member.

Certain embodiments of the present disclosure allow for providing a display device that includes micro-LEDs as pixels and can be manufactured at low cost, and a method of manufacturing a display device.

