Micro LED Display Panel With Shared Backup Pixel Driving
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Solution Overview
Problem
Existing micro LED display devices face challenges in repairing defects during the transfer process without additional processes and are hindered by the space and component count required for driving circuits.
Innovation Solution
A display panel design that includes main and sub light-emitting elements connected to separate switch elements, allowing a driving circuit to reroute current to functional sub-elements when main elements fail, and utilizes shared power lines to reduce the number of components and circuit area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate driving circuits are provided for main and sub light-emitting elements, then reliability is improved, but device complexity increases
Solution Approach 1:
A single driving circuit is designed to perform multiple functions by sequentially driving both main light-emitting elements and sub light-emitting elements. The driving circuit includes a main light-emitting element driving unit and a sub light-emitting element driving unit that can operate at different time periods, allowing one circuit to replace what would traditionally require separate circuits for each element type.
2Reliability
If sub light-emitting elements are added for defect compensation, then reliability is improved, but area occupied increases
Solution Approach 1:
The sub light-emitting elements are integrated into the same pixel structure as the main light-emitting elements, sharing common electrodes and circuitry. The first electrode of sub elements is connected to the first line, and the second electrode is connected to the second line, merging the circuit paths and reducing the overall area required compared to separate implementations.
Solution Approach 2:
The patent implements a dynamic switching mechanism where the driving circuit can selectively activate main or sub light-emitting elements based on detected defects. The driving method dynamically adjusts which elements are driven at different time periods, allowing the system to adapt to defects without requiring additional physical space for separate driving circuits.
3Device complexity
If main and sub light-emitting elements share common lines, then device complexity is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent segments the driving function into distinct time periods: a first time period for driving main light-emitting elements and a second time period for driving sub light-emitting elements. This temporal segmentation allows common physical infrastructure (lines and electrodes) to serve multiple purposes without requiring higher manufacturing precision, as each element type is activated separately in its designated time window.
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 defect-free operation without additional repair processes and minimizes the space and number of driving circuits, enhancing efficiency and reducing complexity.
Implementation Method 1
a plurality of main light-emitting elements each having a first electrode connected to a first line; a plurality of sub light-emitting elements each having a first electrode connected to a second line; a driving circuit configured to generate current for driving one or more of the plurality of main light-emitting elements and one or more of the plurality of sub light-emitting elements
Data Source
AI summary
The present embodiment relates to a display panel, and more particularly, to a display panel, which can be used without a separate repair process in case that a defect occurs in a micro light-emitting diode (LED) in a transfer process, and can reduce areas occupied by driving circuits and the number of components.