Micro-LED Light Guide Grooves Prevent Crosstalk
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Solution Overview
Problem
Current Micro-LED display technology faces challenges such as light crosstalk between core particles due to small particle distances and large emission angles, as well as manufacturing costs and performance issues like light directionality and uniformity.
Innovation Solution
A semiconductor structure with a substrate featuring light guide grooves that correspond to light emitting units, incorporating wavelength conversion dielectric materials and a reflective layer, and utilizing a thin film flip-chip process to ensure uniform light emission and prevent crosstalk, while allowing for full-color display with high resolution and cost savings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the distance between core particles is reduced to improve pixel density, then the resolution is improved, but light crosstalk between particles increases
Solution Approach 1:
The substrate is divided into multiple light guide grooves, each corresponding to a light emitting unit. This segmentation physically separates the light paths of adjacent pixels, preventing crosstalk while maintaining high pixel density. Each groove acts as an independent light guide channel that confines light to its designated pixel region.
Solution Approach 2:
The light guide groove serves as an intermediary structure between adjacent light emitting units. It mediates the light propagation by providing a dedicated optical path that prevents direct light interference between neighboring pixels, thus eliminating crosstalk while allowing particles to be positioned closely together.
2Illumination intensity
If the emission angle is increased to improve light output, then the brightness is improved, but light directionality deteriorates
Solution Approach 1:
The light guide groove provides different optical properties in different regions: it allows wide-angle light emission to maximize brightness while simultaneously providing directional control through its structured geometry. The groove's shape and depth are optimized to maintain high light output in the desired viewing direction while suppressing emission in unwanted directions.
3Ease of manufacture
If traditional LED display technology is used, then manufacturing is simpler, but system volume and weight are larger
Solution Approach 1:
The patent merges multiple functions into a single integrated structure: the substrate serves as both the mechanical support and the light guide medium, the light guide grooves are formed directly in the substrate rather than being separate components, and the wavelength conversion layer is applied directly to the substrate surface. This integration eliminates the need for separate light guide plates and reduces overall system volume and weight.
4Ease of operation
If light guide grooves are added to prevent crosstalk, then light directionality is improved, but device complexity increases
Solution Approach 1:
The light guide groove structure serves multiple functions simultaneously: it acts as a physical barrier to prevent light crosstalk, serves as a wavelength conversion platform, provides structural support for the light emitting units, and guides light propagation. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity.
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 solution achieves uniform and directive light emission, avoids light crosstalk, and improves manufacturing efficiency, resulting in high-resolution full-color displays with uniform current distribution between pixels.
Implementation Method 1
A wavelength conversion dielectric material may be disposed in the light guide groove, and the wavelength conversion dielectric material may include quantum dots, phosphors, and the like.
Implementation Method 2
a reflective layer may be further provided on a side wall of the light guide groove
Data Source
AI summary
The present application provides a semiconductor structure and a method for manufacturing the same. The semiconductor structure includes: a substrate on which at least one light guide groove is provided, the light guide groove penetrating the substrate; and a light emitting structure disposed on one side of the substrate, the light emitting structure including at least one set of a first electrode and a second electrode. The light guide groove at least corresponds to one set of a first electrode and a second electrode to prevent bad points. A wavelength conversion dielectric layer is filled into the light guide groove to avoid a coffee ring effect and achieve uniform and full-color light emission of a light emitting device. The semiconductor structure may further save manufacturing costs and prevent crosstalk between light emitted from various light emitting units.