Display Substrate Light-Dimming Layer for Uniform Mini LED Surfaces
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Solution Overview
Problem
Existing display substrates using mini LEDs or micro LEDs face issues with black adhesive thickness limitations, leading to increased power consumption and surface unevenness due to grinding processes, which affect display quality and appearance.
Innovation Solution
A display substrate design featuring a light dimming layer with absorbing and reflecting sub-layers positioned between and on top of light-emitting devices, integrated with a second base to protect and absorb external light, reducing power consumption and enhancing display contrast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If black adhesive is used to fill gaps between light-emitting devices, then power consumption is reduced, but surface unevenness occurs due to thickness limitations and grinding requirements
Solution Approach 1:
The light dimming layer is applied selectively in the gaps between light-emitting devices rather than uniformly across the entire surface. This localized application allows the adhesive to fill gaps precisely where needed without requiring extensive grinding of the entire surface, thus reducing surface unevenness while maintaining power consumption benefits
Solution Approach 2:
The patent uses a composite light dimming layer comprising multiple sub-layers with different properties: a first sub-layer containing light-absorbing particles for power consumption reduction, and a second sub-layer without particles for surface smoothing. This composite structure resolves the contradiction by combining the advantages of both materials while mitigating their individual drawbacks
2Use of energy by moving object
If light dimming layer is applied to reduce power consumption, then energy efficiency improves, but display quality may be affected by surface uniformity
Solution Approach 1:
The light dimming layer is segmented into multiple sub-layers, each performing a specific function. The first sub-layer focuses on light absorption to reduce power consumption, while the second sub-layer ensures surface uniformity for display quality. This segmentation allows each layer to optimize its specific function without compromising the other
Solution Approach 2:
The light-absorbing particles are localized specifically in the gaps between light-emitting devices rather than being uniformly distributed across the entire display surface. This localized placement ensures that power consumption is reduced where needed while maintaining surface uniformity and display quality in the visible areas
3Manufacturing precision
If grinding process is used to achieve uniform surface, then surface finish improves, but manufacturing complexity and time increase
Solution Approach 1:
The light dimming layer is applied in advance during the manufacturing process to fill gaps and provide surface uniformity before final assembly steps. This preliminary action eliminates the need for subsequent grinding operations, simplifying the manufacturing process while achieving the desired surface finish
Solution Approach 2:
The patent replaces the mechanical grinding process with a chemical/adhesive-based solution. Instead of using mechanical force to remove material and achieve uniformity, the light dimming layer chemically bonds to fill gaps and provide surface uniformity, thereby eliminating the complex grinding machinery and processes
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 design improves display contrast and reduces power consumption by effectively absorbing external and emitted light, while maintaining a uniform surface and stable device fixation, thus enhancing display quality.
Implementation Method 1
a material of a portion, located in the gaps between the plurality of light-emitting devices, of the light dimming layer includes a light absorbing material; and the light dimming layer is configured to absorb part of light entering the light dimming layer
Implementation Method 2
The second base covers the light dimming layer
Data Source
AI summary
A display substrate includes a first base, a plurality of light-emitting devices disposed on a side of the first base, a light dimming layer located in gaps between the plurality of light-emitting devices and located on surfaces of the plurality of light-emitting devices away from the first base, and a second base covering the light dimming layer. The plurality of light-emitting devices are spaced apart from each other. At least one light-emitting device is surrounded by the light dimming layer, a material of a portion, located in the gaps between the plurality of light-emitting devices, of the light dimming layer includes a light absorbing material, and the light dimming layer is configured to absorb part of light entering the light dimming layer.