Micro-LED Protection Structure for Higher-Contrast Display Panels
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Solution Overview
Problem
Existing display technologies face issues with light reflection from micro light-emitting elements and metal wirings, leading to decreased contrast and affected viewing experience, and the use of light-shielding materials can damage or reduce the light-emitting efficiency of these elements.
Innovation Solution
A display panel design with independently disposed protection structures covering the light-emitting surfaces of micro light-emitting elements, using either light-transmitting or light-shielding materials to prevent damage and residual material on the light-emitting surfaces, thereby improving light-emitting efficiency and display effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If light-shielding materials are used to shield metal wirings, then light reflection is reduced, but light-shielding material remains on light-emitting surfaces affecting light-emitting efficiency
Solution Approach 1:
The light-shielding layer is divided into multiple segments corresponding to different metal wiring regions, with spacing between segments. This segmentation allows the light-shielding function to be maintained while preventing material accumulation on light-emitting surfaces, as the spaced structure enables complete removal of excess material.
Solution Approach 2:
The light-shielding layer is locally applied only to regions where metal wirings are present, rather than covering the entire substrate. The patterned structure provides light-shielding properties precisely where needed while leaving light-emitting surfaces exposed and free of residual material.
2Object-affected harmful factors
If light-shielding materials are used to shield metal wirings, then contrast is improved, but damage occurs to light-emitting elements
Solution Approach 1:
The segmented light-shielding layer structure creates isolated regions of light-shielding material that can be precisely controlled and removed. This prevents damage to light-emitting elements by ensuring material is applied only where needed and can be completely cleared from sensitive areas.
Solution Approach 2:
The spaced patterned structure acts as an intermediary approach, providing light-shielding functionality while maintaining a protective distance from light-emitting elements. The spacing ensures that even during material deposition and removal processes, direct contact and potential damage to light-emitting elements are avoided.
3Object-affected harmful factors
If light-shielding layer is applied to shield metal wirings, then viewing experience is improved, but fabrication process becomes complex
Solution Approach 1:
The light-shielding layer is segmented into discrete regions corresponding to metal wiring locations. This segmentation can be achieved through standard photolithography patterning techniques, making the fabrication process manageable while still providing effective light-shielding to improve viewing experience.
Solution Approach 2:
The same light-shielding layer structure serves multiple functions: shielding metal wirings from view, preventing material accumulation on light-emitting surfaces, and maintaining a clean fabrication process. This multi-functionality reduces the need for additional separate process steps.
Data Source
AI summary
A display panel, a method for manufacturing a display panel, and display device are provided. The display panel includes a driving substrate and a light-emitting element disposed on a side of the driving substrate. The light-emitting element includes a light-emitting element body and a protection structure. The protection structure contacts and covers a light-emitting surface of the light-emitting element body. The light-emitting surface includes a first light-emitting surface and/or a side light-emitting surface. The first light-emitting surface is a surface of the light-emitting element body away from the driving substrate. A plane where the side light-emitting surface is located intersects with a plane where the first light-emitting surface is located. The protection structures of at least a portion of the light-emitting elements are independently disposed.