Abstract:
A manufacturing method of a light emitting diode (LED) display device includes forming at least one sub-pixel circuit on a substrate, forming a primary electrical pad and a first backup electrical pad electrically connected to the sub-pixel circuit, disposing a first micro light emitting device on the primary electrical pad and testing the first micro light emitting device.
Abstract:
A method for repairing a light-emitting diode (LED) lighting device is provided. The method includes the operations below. First, the LED lighting device is obtained. The LED lighting device includes a substrate having a top surface and a recess, a first bottom electrode disposed on the top surface and on a bottom surface of the recess, a second bottom electrode disposed on the top surface, an LED disposed in the recess and on the first bottom electrode, and a top transparent electrode disposed on the LED and the second bottom electrode. Then, a test is performed to know whether the first bottom electrode, the LED, the top transparent electrode, and the second bottom electrode form a part of an electrical loop. Finally, a connecting member is formed to electrically connect the first bottom electrode and the second bottom electrode if the electrical loop is open.
Abstract:
A transfer head array includes a body and a plurality of transfer heads. The body has a first surface, a second surface opposite to the first surface, and a plurality of recesses. The first surface has at least one chucking region and at least one interference avoidance region, and the recesses are separated from each other and are disposed in the interference avoidance region. The transfer heads are disposed on the chucking region.
Abstract:
A light-emitting diode (LED) includes a first type semiconductor layer, a second type semiconductor layer, a current controlling structure, a first electrode, and a second electrode. The second type semiconductor layer is joined with the first type semiconductor layer. The current controlling structure is joined with the first type semiconductor layer, and the current controlling structure has at least one current-injecting zone therein. The first electrode is electrically coupled with the first type semiconductor layer through the current-injecting zone of the current controlling structure. The second electrode is electrically coupled with the second type semiconductor layer.
Abstract:
A micro-light-emitting diode (micro-LED) includes a first type semiconductor layer, a second type semiconductor layer, a first edge isolation structure, a first electrode, and a second electrode. The second type semiconductor layer and the first edge isolation structure are joined with the first type semiconductor layer. The first electrode is electrically coupled with the first type semiconductor layer. At least a part of a vertical projection of an edge of the first type semiconductor layer on the first electrode overlaps with the first electrode. The first edge isolation structure is at least partially located on the part of the first type semiconductor layer. The second electrode is electrically coupled with the second type semiconductor layer.
Abstract:
A micro-light-emitting diode (micro-LED) includes a first type semiconductor layer, a second type semiconductor, a first current controlling layer, a first electrode, and a second electrode. The second type semiconductor layer and the first current controlling layer are joined with the first type semiconductor layer. The first current controlling layer has at least one opening therein. The first electrode is electrically coupled with the first type semiconductor layer through the opening. The second electrode is electrically coupled with the second type semiconductor layer. At least one of the first electrode and the second electrode has a light-permeable part. A vertical projection of the first current controlling layer on said one of the first electrode and the second electrode overlaps with the light-permeable part. The light-permeable part is transparent or semi-transparent.
Abstract:
A method for preparing a plurality of micro-devices for transfer includes temporarily bonding the micro-devices onto a carrier substrate; testing the micro-devices on the carrier substrate to determine if there is at least one first failed micro-device in the micro-devices; and removing the first failed micro-device from the carrier substrate.
Abstract:
A light-emitting diode (LED) includes a first type semiconductor layer, a second type semiconductor layer, a first current controlling structure, and a first electrode. The second type semiconductor layer is joined with the first type semiconductor layer. The second type semiconductor layer has a first region and a second region, in which the first region has a first threading dislocation density, the second region has a second threading dislocation density, and the first threading dislocation density is greater than the second threading dislocation density. The first current controlling structure is joined with the first type semiconductor layer and has at least one first current-injecting zone therein, in which the vertical projection of the second region on the first current controlling structure at least partially overlaps with the first current-injecting zone. The first electrode is electrically coupled with the first type semiconductor layer.