Micro-LED Display Panel Layout for Fingerprint Sensing Alignment
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Solution Overview
Problem
Conventional micro-LED display panel manufacturing processes face challenges in ensuring proper alignment of massive micro-LEDs, maintaining luminescent and fingerprint recognition functions, and improving display quality and touch control performance.
Innovation Solution
A display panel structure incorporating a thin-film transistor (TFT) device layer, planarization layer, electrode layers, and a fingerprint recognition module with a storage capacitor, where the fingerprint recognition module includes a sensing electrode layer and a light-enhancing layer, optimized to improve alignment and performance with a through-hole structure for efficient light transmission and interference reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If massive micro-LEDs are transferred into the display panel, then the luminous effect and display quality are improved, but the alignment precision and manufacturing complexity become difficult to control
Solution Approach 1:
The patent applies preliminary action by pre-forming alignment marks and positioning structures on the substrate before transferring the micro-LEDs. The alignment marks are created during the substrate processing stage, enabling precise positioning of massive micro-LEDs during the transfer process without requiring complex real-time adjustment mechanisms.
Solution Approach 2:
The patent uses alignment marks as an intermediary element between the substrate and the micro-LEDs. These marks serve as reference points that facilitate the alignment process, allowing the micro-LEDs to be positioned accurately on the substrate during mass transfer without direct mechanical positioning of each individual LED.
2Quantity of substance
If the array substrate corresponds to massive micro-LEDs, then the display quality is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent applies segmentation by dividing the manufacturing process into distinct stages: substrate preparation with alignment marks, micro-LED array formation, and transfer processes. This segmentation allows each stage to be optimized independently, managing the complexity of handling massive numbers of micro-LEDs through systematic process breakdown.
Solution Approach 2:
The patent employs universal alignment marks and positioning structures that serve multiple functions: they guide micro-LED placement, define pixel boundaries, and provide references for subsequent manufacturing steps. This multi-functionality reduces the need for separate positioning mechanisms for each operation.
3Productivity
If conventional manufacturing processes are used, then the production efficiency is maintained, but the display quality and touch control performance cannot be simultaneously ensured
Solution Approach 1:
The patent merges the alignment mark formation with the existing substrate manufacturing process, integrating multiple functions into a single process step. The alignment marks are formed using the same deposition and patterning equipment already present in the manufacturing line, thereby maintaining production efficiency while enabling improved display quality and touch control performance.
Data Source
AI summary
A display panel and a manufacturing method thereof are provided. A fingerprint recognition module and a storage capacitor of the display panel are disposed in a thin-film transistor (TFT) device layer. The fingerprint recognition module is electrically connected to an active layer and the storage capacitor of a TFT by an electrode layer, thereby optimizing a structure of an array substrate. Furthermore, the display panel can better receive reflected light signals and has improved fingerprint recognition performance. The display panel has a simple manufacturing process and low manufacturing costs.