US-20260130032-A1 - DISPLAY APPARATUS

US20260130032A1US 20260130032 A1US20260130032 A1US 20260130032A1US-20260130032-A1

Abstract

A display apparatus includes a driving backplane, a first light-emitting element, an island-shaped insulation structure, and a conductive pattern disposed on island-shaped insulation structure and electrically connected to a second electrode of first light-emitting element. The driving backplane has a common electrode, a sub-pixel driving circuit, a first pad, a second pad, and a third pad. The first and second pads are electrically connected to the sub-pixel driving circuit. The third pad is electrically connected to the common electrode. A first electrode of the first light-emitting element is bonded to the first pad of driving backplane. Island-shaped insulation structure is disposed on first light-emitting element. Second and third pads are located outside island-shaped insulation structure, which includes first and second insulation layers. First insulation layer covers first light emitting element. Second insulation layer is disposed on first insulation layer. First portion of second insulation layer extends outside first insulation layer.

Inventors

Sheng-Miao HUANG
Chan-Jui Liu

Assignees

AUO Corporation

Dates

Publication Date: 20260507
Application Date: 20250606
Priority Date: 20241106

Claims (15)

1 . A display apparatus, comprising: a driving backplane having a common electrode, a sub-pixel driving circuit, a first pad, a second pad, and a third pad, wherein the third pad is structurally separated from the first pad and the second pad, the first pad and the second pad are electrically connected to the sub-pixel driving circuit, and the third pad is electrically connected to the common electrode; a first light-emitting element, wherein the first light-emitting element has a first type semiconductor layer, a second type semiconductor layer, a first active layer disposed between the first type semiconductor layer and the second type semiconductor layer, a first electrode electrically connected to the first type semiconductor layer, and a second electrode electrically connected to the second type semiconductor layer, the first electrode and the second electrode are respectively disposed on opposite sides of the first active layer, and the first electrode of the first light-emitting element is bonded to the first pad of the driving backplane; an island-shaped insulation structure disposed on the first light-emitting element, wherein the second pad and the third pad are located outside the island-shaped insulation structure, and the island-shaped insulation structure comprises: a first insulation layer covering the first light-emitting element; and a second insulation layer disposed on the first insulation layer, and having an opening located on the second electrode of the first light-emitting element, wherein a first portion of the second insulation layer extends outside the first insulation layer; and a conductive pattern disposed on the island-shaped insulation structure, wherein a first end of the conductive pattern fills into the opening of the second insulation layer of the island-shaped insulation structure and is electrically connected to the second electrode of the first light-emitting element, and a second end of the conductive pattern extends from the first portion of the second insulation layer of the island-shaped insulation structure to outside the island-shaped insulation structure and is electrically connected to the common electrode of the driving backplane.
2 . The display apparatus as claimed in claim 1 , wherein in a top view of the display apparatus, a second portion of the second insulation layer is located within an area of the first insulation layer, and an edge of the second portion of the second insulation layer is separated from an edge of the first insulation layer by a distance.
3 . The display apparatus as claimed in claim 2 , wherein the distance falls within a range of 0.5 μm to 3.5 μm.
4 . The display apparatus as claimed in claim 2 , wherein the first pad, the second pad, and the third pad are arranged in a first direction parallel to the driving backplane, the edge of the second portion of the second insulation layer comprises a first sub-edge intersecting with the first direction, the edge of the first insulation layer comprises a first sub-edge intersecting with the first direction and not covered by the second insulation layer, and the first sub-edge of the first insulation layer is separated from the first sub-edge of the second insulation layer by a first distance in the first direction.
5 . The display apparatus as claimed in claim 4 , wherein a second direction is parallel to the driving backplane and intersects with the first direction, the edge of the second portion of the second insulation layer further comprises a second sub-edge and a third sub-edge arranged in the second direction and opposite to each other, the edge of the first insulation layer further comprises a second sub-edge and a third sub-edge arranged in the second direction, opposite to each other, and not covered by the second insulation layer, the second sub-edge of the second insulation layer is separated from the second sub-edge of the first insulation layer by a second distance, and the third sub-edge of the second insulation layer is separated from the third sub-edge of the first insulation layer by a third distance.
6 . The display apparatus as claimed in claim 2 , further comprising: an optical structure covering the island-shaped insulation structure, the second pad, and the third pad, wherein the first insulation layer has a side wall defining the edge of the first insulation layer, the first insulation layer has a top surface facing away from the driving backplane, the second insulation layer has a side wall defining the edge of the second portion of the second insulation layer, the optical structure contacts the side wall of the first insulation layer, the top surface of the first insulation layer, and the side wall of the second insulation layer, and the optical structure comprises a color conversion pattern, a transparent pattern, or a scattering pattern.
7 . The display apparatus as claimed in claim 1 , wherein a portion of the first insulation layer of the island-shaped insulation structure and the first portion of the second insulation layer cover a portion of the common electrode.
8 . The display apparatus as claimed in claim 1 , wherein the first light-emitting element has the first active layer, the first insulation layer of the island-shaped insulation structure has a top surface facing away from the driving backplane, and the top surface of the first insulation layer is higher than the first active layer of the first light-emitting element.
9 . The display apparatus as claimed in claim 1 , wherein the second insulation layer of the island-shaped insulation structure has a top surface facing away from the driving backplane, and the top surface of the second insulation layer of the island-shaped insulation structure is higher than the second electrode of the first light-emitting element.
10 . The display apparatus as claimed in claim 1 , further comprising: a second light-emitting element, wherein the second light-emitting element has a third type semiconductor layer, a fourth type semiconductor layer, a second active layer disposed between the third type semiconductor layer and the fourth type semiconductor layer, a third electrode electrically connected to the third type semiconductor layer, and a fourth electrode electrically connected to the fourth type semiconductor layer, the third electrode and the fourth electrode are disposed on same side of the second active layer, the third electrode and the fourth electrode of the second light-emitting element are respectively bonded to the second pad and the third pad of the driving backplane, a second portion of the second insulation layer of the island-shaped insulation structure is located within an area of the first insulation layer, the second insulation layer has a side wall defining an edge of the second portion of the second insulation layer, and the side wall of the second insulation layer is separated from the second light-emitting element by a distance in a first direction parallel to the driving backplane.
11 . A display apparatus, comprising: a driving backplane having a common electrode, a sub-pixel driving circuit, a first pad, a second pad, and a third pad, wherein the third pad is structurally separated from the first pad and the second pad, the first pad and the second pad are electrically connected to the sub-pixel driving circuit, and the third pad is electrically connected to the common electrode; a first light-emitting element, wherein the first light-emitting element has a first type semiconductor layer, a second type semiconductor layer, a first active layer disposed between the first type semiconductor layer and the second type semiconductor layer, a first electrode electrically connected to the first type semiconductor layer, and a second electrode electrically connected to the second type semiconductor layer, the first electrode and the second electrode are respectively disposed on opposite sides of the first active layer, and the first electrode of the first light-emitting element is bonded to the first pad of the driving backplane; an island-shaped insulation structure disposed on the first light-emitting element, wherein the second pad and the third pad are located outside the island-shaped insulation structure, and the island-shaped insulation structure comprises: a first insulation layer covering the first light-emitting element; and a second insulation layer disposed on the first insulation layer, and having an opening located on the second electrode of the first light-emitting element; and a conductive pattern disposed on the island-shaped insulation structure, wherein a first end of the conductive pattern fills into the opening of the second insulation layer of the island-shaped insulation structure and is electrically connected to the second electrode of the first light-emitting element, and a second end of the conductive pattern extends from the second insulation layer of the island-shaped insulation structure to outside the island-shaped insulation structure and is electrically connected to the common electrode of the driving backplane.
12 . The display apparatus as claimed in claim 11 , wherein a portion of the first insulation layer of the island-shaped insulation structure and a first portion of the second insulation layer cover a portion of the common electrode.
13 . The display apparatus as claimed in claim 11 , wherein the first light-emitting element has a first active layer, the first insulation layer of the island-shaped insulation structure has a top surface facing away from the driving backplane, and the top surface of the first insulation layer is higher than the first active layer of the first light-emitting element.
14 . The display apparatus as claimed in claim 11 , wherein the second insulation layer of the island-shaped insulation structure has a top surface facing away from the driving backplane, and the top surface of the second insulation layer of the island-shaped insulation structure is higher than the second electrode of the first light-emitting element.
15 . The display apparatus as claimed in claim 1 , further comprising: a second light-emitting element, wherein the second light-emitting element has a third type semiconductor layer, a fourth type semiconductor layer, a second active layer disposed between the third type semiconductor layer and the fourth type semiconductor layer, a third electrode electrically connected to the third type semiconductor layer, and a fourth electrode electrically connected to the fourth type semiconductor layer, the third electrode and the fourth electrode are disposed on same side of the second active layer, the third electrode and the fourth electrode of the second light-emitting element are respectively bonded to the second pad and the third pad of the driving backplane, a portion of the second insulation layer of the island-shaped insulation structure is located within an area of the first insulation layer, the second insulation layer has a side wall defining an edge of the portion of the second insulation layer, and the side wall of the second insulation layer is separated from the second light-emitting element by a distance in a first direction parallel to the driving backplane.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims the priority benefit of Taiwan application serial no. 113142465, filed on Nov. 6, 2024. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification. BACKGROUND Technical Field The disclosure relates to an optoelectronic apparatus, and particularly relates to a display apparatus. Related Art With the advancement of display technology, the development of the panel industry is no longer just pursuing large size and high production capacity utilization, but is moving toward presenting higher level panel image quality as a goal. The current trend of panel development is gradually shifting from backlight emission to active emission, mainly because active emission panels have advantages such as being thin and light, flexible, wide color gamut, wide viewing angle, high contrast, high resolution, which may present excellent panel image quality and are suitable for more diversified product applications. Among various active emission displays, micro light-emitting diode displays further have advantages that organic light-emitting diode displays do not have, such as local dimming, high brightness, longer service life, and thus have also become the main development technology for the future panel industry. To improve the yield of micro light-emitting diode displays, in addition to disposing micro light-emitting diodes on the main pads of the driving backplane, additional micro light-emitting diodes are further disposed on the repair pads of the driving backplane. After forming multiple micro light-emitting diodes on the main pads and repair pads, a planarization layer is formed to facilitate the subsequent formation of conductive patterns. However, once the planarization layer is formed, the micro light-emitting diode display may not be easily repaired. SUMMARY The disclosure provides a display apparatus, which is convenient for repair. The display apparatus of the disclosure includes a driving backplane, a first light-emitting element, an island-shaped insulation structure, and a conductive pattern. The driving backplane has a common electrode, a sub-pixel driving circuit, a first pad, a second pad, and a third pad. The third pad is structurally separated from the first pad and the second pad. The first pad and the second pad are electrically connected to the sub-pixel driving circuit, and the third pad is electrically connected to the common electrode. The first light-emitting element has a first type semiconductor layer, a second type semiconductor layer, a first active layer disposed between the first type semiconductor layer and the second type semiconductor layer, a first electrode electrically connected to the first type semiconductor layer, and a second electrode electrically connected to the second type semiconductor layer. The first electrode and the second electrode are respectively disposed on opposite sides of the first active layer, and the first electrode of the first light-emitting element is bonded to the first pad of the driving backplane. The island-shaped insulation structure is disposed on the first light-emitting element. The second pad and the third pad are located outside the island-shaped insulation structure. The island-shaped insulation structure includes a first insulation layer and a second insulation layer. The first insulation layer covers the first light-emitting element. The second insulation layer is disposed on the first insulation layer and has an opening located on the second electrode of the first light-emitting element. A first portion of the second insulation layer extends outside the first insulation layer. The conductive pattern is disposed on the island-shaped insulation structure. A first end of the conductive pattern fills into the opening of the second insulation layer of the island-shaped insulation structure and is electrically connected to the second electrode of the first light-emitting element. A second end of the conductive pattern extends from the first portion of the second insulation layer of the island-shaped insulation structure to outside the island-shaped insulation structure and is electrically connected to the common electrode of the driving backplane. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a top view schematic diagram of a display apparatus according to an embodiment of the disclosure. FIG. 2 is a cross-sectional view schematic diagram of the display apparatus according to an embodiment of the disclosure. FIG. 3 is a cross-sectional view schematic diagram of the display apparatus according to an embodiment of the disclosure. FIG. 4 is a cross-sectional view schematic diagram of the display apparatus according to an embodiment of the disclosure. DESCRIPTION OF THE EMBODIMENTS Reference will now be made in detail to exemplary embodiments of the disclosure, examples of the embodiments are illustrated in the accompanying