Micro LED Display Panel Dual-Side Light Transmission
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Solution Overview
Problem
Conventional micro LED display panels primarily display images from one surface, limiting their functionality and potential for dual-sided image display.
Innovation Solution
A micro LED display panel design featuring a substrate with a pixel circuit layer, insulating layers, micro LEDs spaced apart, and electrodes on both sides, allowing for image display on both surfaces, with transparent electrodes and a light-transmissive substrate to enable light emission and passage through both sides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional micro LED display panel displays images from one surface only, then the structure is simple and easy to manufacture, but the functionality and display area are limited
Solution Approach 1:
The patent transitions from single-sided to dual-sided display by utilizing the third dimension (depth/thickness) of the panel structure. By making the substrate light-transmissive and positioning micro LEDs and electrodes on both surfaces, the display functionality extends from one dimension (single surface) to two dimensions (both surfaces), effectively doubling the display area without significantly increasing overall panel thickness.
Solution Approach 2:
The panel structure is designed to perform multiple functions: the light-transmissive substrate serves as both a structural base and an optical window; the micro LEDs and electrodes are configured to emit and transmit light through both surfaces. This multi-functional design enables the same panel to display images on both front and back surfaces simultaneously, enhancing versatility without requiring separate display modules.
2Area of stationary object
If transparent electrodes and light-transmissive substrate are used to enable dual-sided display, then display area and functionality are enhanced, but manufacturing complexity increases
Solution Approach 1:
The display panel is segmented into distinct functional layers and regions: the light-transmissive substrate is divided into front and back surfaces, each with its own electrode patterns and micro LED arrangements. The electrodes are segmented into transparent conductive oxide layers that can be selectively positioned and patterned on different surfaces. This segmentation allows independent optimization and manufacturing of each layer, reducing overall manufacturing complexity despite the enhanced display area.
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
Enables dual-sided image display capabilities, enhancing the panel's functionality and display area while maintaining efficient light transmission and micro LED performance.
Implementation Method 1
a plurality of micro LEDs (40) located on a side of the pixel circuit layer away from the substrate and embedded in the insulating layer (30)
Implementation Method 2
transparent electrodes and a light-transmissive substrate to enable light emission and passage through both sides
Data Source
AI summary
A micro LED display panel able to display images from opposite surfaces includes a substrate, a pixel circuit layer on the substrate, an insulating layer on the pixel circuit layer, at least two micro LEDs on the insulating layer and embedded in the insulating layer, at least two first electrodes, and at least one second electrode. The pixel circuit layer includes at least two TFTs. Each micro LED includes a first end adjacent to the pixel circuit layer and a second end opposite to the first end and exposed from the insulating layer. Each first electrode is between the first end of each micro LED and the pixel circuit layer. The second electrode covers the second end of each micro LED and is transparent. Each first electrode defines a light transmitting region to allow light emitted from the micro LED to pass through.