Matrix LED Optical Shield Layers for Crosstalk Reduction
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Solution Overview
Problem
Semiconductor light-emitting devices with LED elements arranged in a matrix face challenges in minimizing dark regions between elements while preventing optical crosstalk, which is exacerbated by the trade-off between dark region size and crosstalk.
Innovation Solution
Incorporating optical shield layers on the side faces of adjacent LED elements, which can be reflective or absorptive, to reduce dark regions and eliminate optical crosstalk regardless of the distance between elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If LED elements are arranged closer to each other, then dark regions are reduced and light emitting regions are increased, but optical crosstalk is generated between adjacent operated and non-operated LED elements
Solution Approach 1:
The invention introduces light-shielding layers between adjacent LED elements to segment the optical paths. These layers divide the space between elements into isolated zones, preventing light from one element from interfering with adjacent elements while maintaining close spacing for reduced dark regions.
Solution Approach 2:
Light-shielding layers serve as intermediary structures positioned between adjacent LED elements. These intermediary layers block optical interference while allowing the LED elements to remain in close proximity, thus eliminating crosstalk without increasing dark regions.
2Object-generated harmful factors
If LED elements are arranged with larger spacing, then optical crosstalk is reduced, but dark regions are created between elements decreasing light emitting regions
Solution Approach 1:
By introducing light-shielding layers, the invention enables close spacing of LED elements without optical crosstalk. The shielding layers segment the optical space, allowing maximum density of light-emitting regions while preventing interference.
Solution Approach 2:
Light-shielding layers act as intermediary structures that enable close packing of LED elements. They mediate between the need for high density (reduced dark regions) and the need to prevent optical interference, allowing elements to be positioned optimally close together.
3Area of stationary object
If optical shield layers are added on side faces of LED elements, then dark regions are decreased and optical crosstalk is eliminated, but device structure becomes more complex
Solution Approach 1:
The light-shielding layers are integrated with the packaging structure and bonding substrates, merging multiple functions into unified components. This integration approach adds necessary optical shielding functionality while minimizing structural complexity through consolidation.
Solution Approach 2:
The light-shielding layers serve multiple functions: they block optical crosstalk, define light emitting boundaries, and integrate with packaging structures. This multi-functionality reduces the need for 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 effectively decreases dark regions and eliminates optical crosstalk, enhancing light-emitting efficiency and maintaining uniform illumination without leakage issues.
Implementation Method 1
optical shield layers each provided at one of a first side face of a first one of the light-emitting elements and a second side face of a second one of the light-emitting elements opposing the first side face of the first light-emitting element
Implementation Method 2
optical shield layers each provided at one of a first side face of a first one of the light-emitting elements and a second side face of a second one of the light-emitting elements opposing the first side face of the first light-emitting element
Implementation Method 3
a phosphor layer P1 including yitrium aluminium garnet (YAG) particles P10 for wavelength-converting blue light into yellow light to form white light
Data Source
AI summary
In a semiconductor light-emitting device including a semiconductor body including light-emitting elements arranged in a matrix, and a support body adapted to support the semiconductor body, the semiconductor body further includes a plurality of optical shield layers each provided at one of a first side face of a first one of the light-emitting elements and a second side face of a second one of the light-emitting elements opposing the first side face of the first light-emitting element.