Micro-LED Light-Emitting Layout for Luminance and Color Uniformity
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Solution Overview
Problem
Existing light-emitting devices with micro-LEDs exhibit variations in luminance and color, leading to reduced display quality.
Innovation Solution
The light-emitting device incorporates a high-density portion with a higher number density of light emitters, featuring a second gradient distribution that matches or exceeds the first gradient distribution, and a drive mechanism to selectively control the emission of light emitters regularly or irregularly, reducing uneven luminance and color variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If numerous microscopic light emitters such as micro-LEDs are transferred onto a target substrate, then the light-emitting device can achieve high brightness and color diversity, but variation in luminance and color occurs on the substrate, reducing display quality
Solution Approach 1:
The patent divides the light-emitting device into multiple light-emitting areas with different light emitter density characteristics. Specifically, it includes a first light-emitting area with a first gradient distribution and a second light-emitting area with a second gradient distribution that has a greater gradient than the first. This local differentiation allows each area to be optimized for its specific function, with higher density areas compensating for variations in lower density areas, thereby improving overall luminance and color uniformity while maintaining high brightness.
Solution Approach 2:
The patent changes the density parameter of light emitters across different areas of the substrate. By creating gradient distributions where the second light-emitting area has a higher gradient than the first, the patent optimizes the spatial distribution of light emitters to compensate for natural variations in emission characteristics,ไป่ improving display quality without sacrificing brightness.
2Manufacturing precision
If light emitters are arranged with high number density in certain areas, then luminance uniformity can be improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent segments the light-emitting device into distinct light-emitting areas (first light-emitting area and second light-emitting area) with different gradient distributions. This segmentation allows for systematic control of light emitter placement, where each area can be manufactured with specific density characteristics using transfer techniques, thereby achieving luminance uniformity while managing manufacturing complexity through structured division.
Solution Approach 2:
The patent employs dynamic control mechanisms including a controller that selectively activates specific light emitters based on their spatial location and emission characteristics. This dynamic activation compensates for density variations and achieves uniform luminance output, balancing the complexity of the gradient distribution structure with intelligent control that simplifies the overall system behavior.
Data Source
AI summary
A light-emitting device includes a body and a plurality of light-emitting areas on the body. Each of the plurality of light-emitting areas includes a plurality of light emitters. The plurality of light-emitting areas includes a first light-emitting area and a second light-emitting area. The second light-emitting area includes, at least in a portion of the second light-emitting area, a high-density portion including light emitters of the plurality of light emitters at a higher number density than the first light-emitting area. The high-density portion includes light-emitting units each including a first light emitter and a second light emitter. In each of the light-emitting units, one of the first light emitter or the second light emitter emits light. The first light emitter or the second light emitter selectively emits light as determined regularly or irregularly for each of the light-emitting units or determined regularly and irregularly across the light-emitting units.