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US 11,145,788 B2Granted
Micro LED transfer head
AssigneePoint Engineering Co., Ltd.
InventorsBum Mo Ahn, Seung Ho Park, Sung Hyun Byun
Life of this patent
Estimating the term…
Abstract
The present invention relates generally to a micro LED transfer head transferring a micro light-emitting diode (micro LED) from a first substrate to a second substrate. More particularly, the present invention relates to a micro LED transfer head holding and transferring a micro LED in which holding portions and surrounding areas of the holding portions are configured of different materials.
Claims10
A micro LED transfer head, comprising:
- a head unit including a plurality of through-holes formed by passing therethrough from top to bottom;
- and
- a plurality of thermo-deformable materials each provided in each of the through-holes,
- wherein micro LEDs are held onto surfaces of the thermo-deformable materials,
- wherein the head unit and the thermo-deformable materials have different coefficients of thermal expansion.
2 more elements
A micro LED transfer head, comprising:
- a head unit including a plurality of through-holes passing therethrough from top to bottom;
- a plurality of pressure-deformable materials each provided in each of the through-holes;
- and
- a pressurizing member provided at an upper portion of the head unit and including a plurality of protrusions protruding from a lower surface of the pressurizing member,
- wherein each the plurality of protrusions is provided at a position corresponding to each of the through-holes, and
- wherein the pressure-deformable materials provided in the respective through-holes are deformed by the plurality of protrusions being inserted into the plurality of through-holes.
3 more elements
A micro LED transfer head, comprising:
- a head unit including a plurality of through-holes passing therethrough from top to bottom;
- a plurality of pressure-deformable materials each provided in each of the through-holes;
- and
- a chamber provided at an upper portion of the head unit and in which pressure is controlled,
- wherein when the pressure in the chamber is controlled to a high-pressure state, the pressure-deformable materials provided in the respective through-holes are more expanded than the head unit and the micro LEDs are held onto surfaces of the expanded pressure-deformable materials, and
- wherein when the pressure in the chamber is controlled to a low-pressure state, the pressure-deformable materials are more contracted than the head unit and the micro LEDs are detached from the surfaces of the contracted pressure-deformable materials.
3 more elements
Dependencies are inferred from the claim text.