US 12,622,327 B2Granted

Micro light-emitting diode

AssigneeRayleigh Vision Intelligence Co. Ltd.

InventorsJr-Hau He, Chun-Wei Tsai, Zhi-Ting Ye, Der-Hsien Lien, Yuk-Tong Cheng

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Abstract

The present invention provides a micro light-emitting diode (LED). A conductive layer is disposed on a substrate. A light-emitting assembly is disposed on the conductive layer. A first light-emitting semiconductor and a second light-emitting semiconductor of the light-emitting assembly are stacked vertically. A first conductive bump and a second conductive bump of a conductive bump set electrical conduct the first light-emitting semiconductor and the second light-emitting semiconductor. Thereby, the volume of the micro LED can be shrunk.

Claims10

Dependent claims

A micro light-emitting diode, comprising:

a substrate;
a conductive layer, including a first electrode and a second electrode disposed on said substrate apart;
a light-emitting assembly, disposed on said conductive layer, said light-emitting assembly including:
a first light-emitting semiconductor, including a first light-emitting element, a first n-type electrode, and a first p-type electrode, a side of said first light-emitting element disposed on said conductive layer, said first n-type electrode and said first p-type electrode disposed on another side of said first light-emitting element, said first light-emitting element including a first light-emitting layer, and said first light-emitting layer including a first area;
and
a second light-emitting semiconductor, disposed vertically on said first light-emitting semiconductor, including a second light-emitting element, a second n-type electrode, and a second p-type electrode, said second n-type electrode disposed on said first p-type electrode, said second p-type electrode disposed on said first n-type electrode, said second light-emitting element disposed on said second p-type electrode and said second n-type electrode, said second light-emitting element including a second light-emitting layer, said second light-emitting layer including a second area, and said first area greater than said second area;
and
a conductive bump set, including a first conductive bump and a second conductive bump, an end of said first conductive bump disposed on the said electrodes and extending to a side of said first n-type electrode and a side of said second p-type electrode, an end of said second conductive bump disposed on said second electrodes and extending to a side of said first p-type electrode and a side of said second n-type electrode;
wherein during a persistence time of vision, any of said first electrode and said second electrode receives a control signal from said conductive layer for enabling an electrical conduction in one of said first light-emitting semiconductor and said second light-emitting semiconductor.

6 more elements

Dependencies are inferred from the claim text.

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Abstract

A micro light-emitting diode, comprising:

a substrate;
a conductive layer, including a first electrode and a second electrode disposed on said substrate apart;
a light-emitting assembly, disposed on said conductive layer, said light-emitting assembly including:
a first light-emitting semiconductor, including a first light-emitting element, a first n-type electrode, and a first p-type electrode, a side of said first light-emitting element disposed on said conductive layer, said first n-type electrode and said first p-type electrode disposed on another side of said first light-emitting element, said first light-emitting element including a first light-emitting layer, and said first light-emitting layer including a first area;
and
a second light-emitting semiconductor, disposed vertically on said first light-emitting semiconductor, including a second light-emitting element, a second n-type electrode, and a second p-type electrode, said second n-type electrode disposed on said first p-type electrode, said second p-type electrode disposed on said first n-type electrode, said second light-emitting element disposed on said second p-type electrode and said second n-type electrode, said second light-emitting element including a second light-emitting layer, said second light-emitting layer including a second area, and said first area greater than said second area;
and
a conductive bump set, including a first conductive bump and a second conductive bump, an end of said first conductive bump disposed on the said electrodes and extending to a side of said first n-type electrode and a side of said second p-type electrode, an end of said second conductive bump disposed on said second electrodes and extending to a side of said first p-type electrode and a side of said second n-type electrode;
wherein during a persistence time of vision, any of said first electrode and said second electrode receives a control signal from said conductive layer for enabling an electrical conduction in one of said first light-emitting semiconductor and said second light-emitting semiconductor.

6 more elements