Mini LED Display Substrate Light-Absorbing Gap Layer for Contrast
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Solution Overview
Problem
Mini LEDs in display devices suffer from reduced contrast due to light reflection from the base and LEDs, leading to unwanted brightness when the display is supposed to be dark, which affects the overall display performance.
Innovation Solution
A display substrate with a light adjustment layer that includes a light-absorbing material, strategically placed in gaps between Mini LEDs to absorb incident light and reduce reflection, comprising a single or multi-layer structure with specific thickness and material configurations to optimize light absorption and reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light adjustment layer with light-absorbing material is added to absorb incident light, then contrast is enhanced and light reflection is minimized, but device complexity increases due to additional layer structure
Solution Approach 1:
The light adjustment layer is segmented into multiple sub-layers with different functions: a first sub-layer with reflective material to reflect light back into light-emitting devices, and a second sub-layer with light-absorbing material to absorb incident light. This segmentation allows each sub-layer to address specific aspects of the contradiction independently, achieving enhanced contrast while managing device complexity through functional division.
2Illumination intensity
If light adjustment layer is placed in gaps among light-emitting devices to reduce reflection, then contrast is improved, but manufacturing precision requirements increase for proper positioning and thickness control
Solution Approach 1:
The light adjustment layer is selectively applied only in the gaps among light-emitting devices rather than uniformly across the entire base surface. The thickness of the light adjustment layer in the gaps is specifically controlled to be 0.5 to 1.5 times the thickness of the light-emitting devices, creating local quality variations that optimize light absorption and reflection properties while simplifying manufacturing precision requirements through targeted application.
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
Enhances contrast by minimizing light reflection and absorption, allowing for improved brightness control and reduced power consumption, enabling better gray scale representation and increased difference between brightest and darkest states.
Implementation Method 1
A material of the light adjustment layer includes a light-absorbing material. The light adjustment layer is configured to absorb light incident on the light adjustment layer.
Implementation Method 2
A material of the first sub-light adjustment layer includes a reflective material. The first sub-light adjustment layer is configured to reflect light incident from the light-emitting devices to the first sub-light adjustment layer back into the light-emitting devices.
Data Source
AI summary
A display substrate includes a base, a plurality of light-emitting devices disposed on a side of the base, and a light adjustment layer. The plurality of light-emitting devices are spaced apart from each other. At least part of the light adjustment layer is located in gaps among the plurality of light-emitting devices, so that side walls of at least one of the plurality of light-emitting devices are surrounded by the light adjustment layer. A material of the light adjustment layer includes a light-absorbing material. The light adjustment layer is configured to absorb light incident on the light adjustment layer.