Double-Sided Micro LED Display with High Transmittance
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Solution Overview
Problem
Current display technologies fail to provide a seamless double-sided and transparent display experience with high visible light transmittance, limiting their ability to integrate display images into surrounding environments effectively.
Innovation Solution
A display apparatus comprising a reflective display panel and a micro LED panel, where the reflective display panel has a visible light transmittance greater than 30% and the micro LED panel has a transmittance greater than 50%, allowing for a double-sided display with reduced light energy loss and enhanced transparency by optimizing the arrangement of conductive patterns and micro LED elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a display apparatus is designed with double-sided display function, then display versatility is improved, but light transmittance deteriorates due to multiple layers and components
Solution Approach 1:
The patent implements a nested structure where the micro LED panel is positioned between the reflective display panel and the transparent display panel. This nested arrangement allows all three display technologies to coexist in a single apparatus, with each panel contributing its unique function while sharing the same spatial envelope, thereby achieving double-sided display capability without proportionally increasing light blockage
Solution Approach 2:
The display apparatus is segmented into three independent functional panels: reflective display panel, micro LED panel, and transparent display panel. Each panel operates independently with optimized light transmission characteristics, allowing the system to achieve double-sided display functionality while maintaining high overall transmittance by distributing optical functions across separate segments rather than combining them into a single opaque structure
2Ease of manufacture
If the micro LED panel uses conventional connection pad arrangement, then manufacturing is simplified, but light transmittance and display quality deteriorate due to light leakage and energy loss
Solution Approach 1:
The patent employs an asymmetric connection pad arrangement where connection pads are positioned at different locations relative to the micro LED elements rather than using a symmetric conventional layout. This asymmetric positioning optimizes light extraction pathways, reduces light leakage through the substrate, and minimizes energy loss while maintaining manufacturability through standardized pad placement patterns
Solution Approach 2:
The patent introduces a transparent substrate as an intermediary between the connection pads and the external environment. This substrate mediates the optical interaction by allowing light to pass through while providing structural support for the connection pads, thereby reducing direct light blockage by metal pads and improving overall light transmittance without complicating the manufacturing process
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 a double-sided display effect with improved light transmittance, enabling the display apparatus to present images on both sides while maintaining a transparent appearance, reducing visibility and enhancing display quality.
Implementation Method 1
The micro LED panel includes a drive circuit layer and a plurality of micro LED elements. The micro LED elements are electrically bonded to the drive circuit layer.
Implementation Method 2
The reflective display panel is provided with the first display surface and a visible light transmittance of the reflective display panel is higher than 30%.
Implementation Method 3
The reflective display panel includes a first conducting layer, a second conducting layer, and a display medium layer. The first conducting layer and the second conducting layer define a plurality of pixel structures of the reflective display panel.
Data Source
AI summary
A display apparatus including a first display surface and a second display surface opposite to each other is provided. The display apparatus includes a reflective display panel and a micro light-emitting diode (LED) panel. The reflective display panel is provided with the first display surface and a visible light transmittance of the reflective display panel is higher than 30%. The micro LED panel is disposed overlapping with the reflective display panel and provided with the second display surface. The micro LED panel includes a drive circuit layer and a plurality of micro LED elements. The drive circuit layer is located between the reflective display panel and the second display surface. The micro LED elements are electrically bonded to the drive circuit layer. A visible light transmittance of the micro LED panel is higher than 50%.