Micro LED Display Substrate with Backside Touch and Reflective Layer
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Solution Overview
Problem
Conventional LED displays require multiple substrates and configurations, leading to increased thickness and complexity, while also potentially reducing light utilization efficiency.
Innovation Solution
A display device design featuring micro LED chips between a reflective layer and a sub-pixel circuit on a single display substrate, with a touch sensing layer on the backside and micro-structured package layers to enhance light reflection and transmission, thereby omitting additional substrate configurations and improving light utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional LED displays use multiple substrates and configurations, then the display can be assembled, but the thickness increases and structure becomes complex
Solution Approach 1:
The patent combines multiple functional layers (display substrate, touch sensing layer, reflective layer, and micro LED chip mounting) into a single integrated structure. The display substrate serves dual purposes as both the structural base and the mounting platform for micro LED chips, eliminating the need for separate substrates and reducing overall thickness while maintaining assembly capability.
Solution Approach 2:
The patent utilizes the backside of the display substrate for touch sensing functionality, effectively using both sides of the substrate for different purposes. This dimensional utilization allows the front side to be dedicated to light emission while the backside accommodates touch sensing, reducing the need for additional layers and decreasing overall device thickness.
2Ease of manufacture
If conventional LED displays use multiple substrates and configurations, then the display can be assembled, but the device complexity increases
Solution Approach 1:
The patent merges the display function and touch sensing function into a single integrated substrate structure. The display substrate simultaneously serves as the structural base, the mounting platform for micro LED chips, and the support for the touch sensing layer, thereby simplifying the overall device structure while maintaining assembly capability.
Solution Approach 2:
The display substrate is designed to perform multiple functions: structural support, electrical connection for micro LED chips, and support for the touch sensing layer. This multi-functionality reduces the need for separate components and simplifies the overall device architecture.
3Device complexity
If conventional LED displays use standard package layers, then the structure is simple, but light utilization efficiency decreases
Solution Approach 1:
The patent introduces micro-structures (such as microlens arrays or reflective patterns) into the package layer at specific locations to enhance light extraction and directionality. These localized structural modifications improve light utilization efficiency by controlling light propagation paths without significantly complicating the overall package layer structure.
Solution Approach 2:
The patent modifies the optical parameters of the package layer by introducing micro-structures that change the refractive index distribution and light scattering characteristics. These parameter changes enhance light extraction efficiency and directional control, improving overall light utilization without requiring a complete structural redesign.
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
This configuration reduces the number of substrates, decreases thickness, and increases light utilization efficiency by reflecting and transmitting lights through the backside of the display substrate, while maintaining high material stability and response speed.
Implementation Method 1
lights emitted from micro LED chips are reflected by a reflective layer
Data Source
AI summary
A display device includes a display substrate, at least one micro light-emitting diode (LED) chip, and at least one reflective layer. The display substrate includes at least one sub-pixel circuit. The micro LED chip is electrically connected to the sub-pixel circuit. The micro LED chip is at least partially disposed between the reflective layer and the sub-pixel circuit.