Semiconductor Module Light Shielding Layer for Display
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Solution Overview
Problem
The existing light emitting device suffers from reduced light extraction efficiency due to the connection method between light emitting elements and light transmitting members, such as pressure bonding or adhesive bonding, which leads to inefficient light emission.
Innovation Solution
A semiconductor module with a base substrate containing a drive circuit, multiple light emitting elements electrically connected to the drive circuit, a light shielding layer between the light emitting elements, and color conversion layers in contact with the light emitting elements, along with a production method involving laser peeling of the growth substrate and application of a light shielding layer to enhance light extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light emitting elements are connected to light transmitting members using pressure bonding or adhesive bonding, then the connection is established, but light extraction efficiency is reduced
Solution Approach 1:
The patent removes the light-transmitting member (such as a sapphire substrate or encapsulation layer) from the light emitting element structure. By directly bonding the light emitting element to the substrate without an intermediate light-transmitting member, light can be extracted from the previously obscured surfaces (side surfaces and bottom surfaces), thereby improving light extraction efficiency while maintaining connection reliability through direct bonding techniques
Solution Approach 2:
The patent inverts the conventional light extraction approach by enabling light to exit from the bottom and side surfaces of the light emitting element in addition to the top surface. This is achieved by removing the light-transmitting member and strategically placing light-shielding layers to control light direction, allowing light to be extracted from multiple directions simultaneously, thus improving overall light extraction efficiency
2Manufacturing precision
If light emitting elements are densely arranged to increase display resolution, then pixel density increases, but light leakage between adjacent elements increases
Solution Approach 1:
The patent introduces light-shielding layers as intermediary structures positioned between adjacent light emitting elements. These light-shielding layers act as mediators that block light from leaking laterally between densely packed elements, allowing high pixel density to be achieved without compromising display quality due to light leakage. The light-shielding layers are strategically placed at the bottom and sides of each light emitting element
Solution Approach 2:
The patent applies light-shielding layers selectively in specific locations where light leakage would be problematic, rather than uniformly across the entire structure. The light-shielding layers are positioned only between adjacent light emitting elements and at the bottom surfaces, allowing light to be extracted freely from the top surfaces while preventing lateral light leakage, thus maintaining high pixel density with controlled light emission
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 improves light extraction efficiency by directing light emission and reducing leakage, resulting in enhanced luminance and color uniformity of the emitted light.
Implementation Method 1
a step of peeling the growth substrate from the plurality of light emitting elements by laser irradiation
Data Source
AI summary
A semiconductor module includes a base substrate; a plurality of light emitting elements; a plurality of color conversion layers being in contact with each upper portion of the plurality of light emitting elements adjacent to each other; and a light shielding layer disposed between the plurality of light emitting elements adjacent each other and between the color conversion layers adjacent to each other, and separating the plurality of light emitting elements and a plurality of color conversion layers.