Display Panel Compensating Structure for Uniform Black Adhesive Coverage
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Solution Overview
Problem
Existing micro-LED or mini-LED display panels face issues with poor display uniformity due to uneven distribution of light-emitting devices and inadequate coverage by the black adhesive layer, resulting from surface tension effects during the manufacturing process.
Innovation Solution
Incorporating a compensating structure on the substrate alongside the light-emitting devices, which helps in uniform arrangement and ensures the black adhesive layer is evenly distributed between the light-emitting devices and the compensating structure, addressing the uneven coverage and distribution issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If mass transfer technology is used to transfer LEDs to the driving substrate, then LED display panels can be manufactured, but the display uniformity is poor due to uneven distribution of light-emitting devices
Solution Approach 1:
The patent introduces a compensating structure that is pre-formed on the substrate before the light-emitting devices are transferred and arranged. This compensating structure serves as a placeholder or guide to ensure uniform distribution of the light-emitting devices, thereby improving display uniformity while maintaining the ease of manufacture through mass transfer technology.
Solution Approach 2:
The compensating structure acts as an intermediary element between the substrate and the light-emitting devices. It facilitates the uniform arrangement of light-emitting devices by providing a reference framework, thus resolving the contradiction between ease of manufacture and manufacturing precision.
2Reliability
If black adhesive layer is applied to fill gaps between light-emitting devices, then coverage is provided, but uneven distribution of light-emitting devices causes inadequate coverage and poor display uniformity
Solution Approach 1:
The compensating structure is pre-formed on the substrate to define the intended positions and spacing of light-emitting devices. This preliminary structure ensures that when the black adhesive layer is applied, it is distributed uniformly across the display area, achieving both adequate coverage and display uniformity.
Solution Approach 2:
The compensating structure promotes homogeneous distribution of the black adhesive layer by providing a uniform framework that guides the adhesive to fill gaps consistently between all light-emitting devices, regardless of their positions. This ensures even coverage and improved display uniformity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The compensating structure improves the uniformity of the black adhesive layer coverage, enhancing display uniformity and contrast by gathering the adhesive material around both the light-emitting devices and the compensating structures, thus addressing the problem of poor display uniformity.
Implementation Method 1
resulting from surface tension effects during the manufacturing process
Data Source
AI summary
A display panel, manufacturing method and display device thereof are described. In an embodiment, the display panel includes: a substrate; a light-emitting device and a compensating structure located on a side of the substrate and located in a display area; and a black adhesive layer located on a side of the substrate and at least filled between the adjacent light-emitting devices and between the adjacent position supplementing structure and light-emitting device. The present disclosure can be used to improve the coverage uniformity of the black adhesive layer and improve the display uniformity.