Micro LED Pentile Pixel Circuit With Redundancy for High Resolution
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Solution Overview
Problem
Existing display devices face challenges in achieving high resolution, low power consumption, and mechanical reliability, particularly in micro LED technology, due to complex circuitry and potential defects in micro LEDs.
Innovation Solution
The integration of multiple sub-pixels into a single pixel driving circuit with an RG BG pentile structure, use of ductile link lines and patterned geometries, and optimized electrode configurations, along with redundancy micro LEDs, to enhance manufacturing yield and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If multiple pixel circuits are integrated into one pixel driving circuit, then power consumption is reduced and circuit complexity is lowered, but manufacturing precision requirements increase
Solution Approach 1:
Multiple pixel circuits are integrated into a single pixel driving circuit, combining multiple functional units into one consolidated circuit structure. This reduces the total number of separate circuits, lowers power consumption, and simplifies the overall circuit architecture while maintaining the ability to drive multiple sub-pixels effectively
2Reliability
If redundancy micro LEDs are added to each sub pixel, then reliability is improved and defect coverage is enhanced, but device complexity increases
Solution Approach 1:
Redundancy micro LEDs are pre-installed in each sub-pixel as backup elements before any defects can occur. These redundancy micro LEDs remain dormant during normal operation but can be activated if a primary micro LED fails, providing fault tolerance and ensuring continuous display functionality without requiring complex real-time monitoring systems
3Manufacturing precision
If an RG BG pentile pixel structure is implemented, then pixel density and resolution are improved, but circuit design complexity increases
Solution Approach 1:
The pixel driving circuit is designed with multi-functionality to handle the RG BG pentile structure. A single pixel driving circuit can drive multiple sub-pixels with different color combinations (red/green and blue/green pairs), making the circuit universal and adaptable to the pentile arrangement. This reduces the need for separate dedicated circuits for each sub-pixel type while maintaining high pixel density
4Reliability
If link lines are formed from ductile materials with patterned geometries, then mechanical reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The link lines are fabricated using ductile materials with specific material parameters that enhance flexibility and mechanical reliability. The patterned geometries of the link lines are designed with optimized dimensions and configurations that improve stress distribution and mechanical robustness. These parameter optimizations are achieved through standard photolithography and metal deposition processes, maintaining ease of manufacture while enhancing mechanical properties
Data Source
AI summary
According to an aspect of the present disclosure, a display device includes a substrate in which a plurality of first pixels and a plurality of second pixels are defined. One or more pixel driving circuits are disposed on the substrate, and a plurality of micro LEDs is disposed in the plurality of first pixels and the plurality of second pixels and electrically connected to the pixel driving circuit. Each of the plurality of first pixels includes one pair of first sub pixels and one pair of second sub pixels and each of the plurality of second pixels includes one pair of third sub pixels and one pair of fourth sub pixels. By providing first and second pixels with different sub pixel combinations, the display device implements a pentile structure that enhances resolution while maintaining compact pixel arrangements.