Micro LED Display Panel Layout With Quantum Dot Through-Hole Matrix
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Solution Overview
Problem
Current methods for preparing inorganic micro light emitting diode (Micro LED) displays face challenges in achieving full-color display due to difficulties in depositing conductive substances and the complexity of the process, particularly with the use of inorganic insulation materials and the need for deep via holes in planarization layers.
Innovation Solution
A display panel design that includes a substrate, a driving circuit layer, light emitting units with quantum dot layers, and a black matrix layer, where the light emitting units are staggered with driving elements and common electrodes, and the black matrix layer defines through holes to facilitate electrical connections and simplify the deposition process, reducing the need for a thick planarization layer and simplifying the preparation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a thick planarization layer is used to facilitate the deposition of conductive substances, then the ease of manufacture is improved, but the device complexity and manufacturing time increase
Solution Approach 1:
The patent extracts and removes the thick planarization layer from the conventional Micro LED preparation process. Instead of using a thick planarization layer to facilitate conductive substance deposition, the invention directly forms conductive substances on the substrate or on previously formed layers, eliminating the need for this complex intermediate structure while maintaining manufacturing feasibility
Solution Approach 2:
The patent segments the preparation process into distinct stages: forming light emitting units, forming black matrix layer with through holes, and forming conductive substances. This segmentation allows each step to be optimized independently, with the black matrix layer's through holes providing direct access points for conductive substance deposition without requiring a thick planarization layer
2Reliability
If deep via holes are created in the planarization layer for electrical connections, then the electrical connectivity is improved, but the manufacturing precision and time consumption increase
Solution Approach 1:
The patent performs preliminary action by forming the black matrix layer with through holes before depositing conductive substances. The through holes are pre-formed with appropriate depth and positioning, allowing subsequent conductive substance deposition to proceed without requiring additional deep via hole etching steps, thereby reducing precision requirements and time consumption
Solution Approach 2:
The black matrix layer serves multiple functions simultaneously: it provides electrical insulation, defines pixel boundaries, and contains through holes for electrical connections. This multi-functionality eliminates the need for separate via hole formation steps in a thick planarization layer, reducing both manufacturing precision requirements and time consumption
3Ease of manufacture
If the light emitting units are arranged in a regular grid pattern, then the ease of manufacture is improved, but the light emitting efficiency decreases due to light blocking by driving elements
Solution Approach 1:
The patent applies asymmetry by staggering the light emitting units relative to the driving elements and common electrodes. This asymmetric arrangement ensures that light emitting units are positioned where they will not be blocked by driving elements, maximizing light emission efficiency while maintaining a relatively simple manufacturing process through systematic offset positioning
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 design enables efficient light emission towards the substrate, achieving full-color display while reducing the complexity of the preparation process and minimizing the risk of short circuits, thereby improving the light emitting efficiency and ease of manufacturing.
Implementation Method 1
the light emitting element is configured to emit light towards the quantum dot layer to excite the quantum dot layer to emit light
Implementation Method 2
excite the quantum dot layer to emit light
Data Source
AI summary
The present application provides a display panel and a method for making the display panel. The display panel includes a substrate, a driving circuit layer, multiple light emitting units, and a black matrix layer. The black matrix layer is located between two adjacent light emitting units. The multiple light emitting units are staggered with driving elements, common electrodes and signal lines. A light emitting element emits light towards a quantum dot layer, thereby exciting the quantum dot layer to emit light. The embodiments of the present application provide a full-color display panel emitting light towards the substrate, and improve electrodes of the driving transistor and/or electrodes of the switching transistor.