Micro LED Display Line Driving Layout for Flicker Inspection
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Solution Overview
Problem
Display devices using micro light-emitting diodes (micro LEDs) are prone to a flicker phenomenon during horizontal line driving, and there is a need for an effective defect inspection method to detect defects early.
Innovation Solution
The display device includes a substrate with alternating first and second light-emitting regions, each with a distinct driving order for horizontal lines, and a defect inspection method that drives these regions differently to inspect light emission in adjacent horizontal lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If horizontal lines are driven sequentially in micro LED display devices, then the display can be controlled and updated, but a flicker phenomenon occurs reducing visual stability
Solution Approach 1:
The display panel is divided into multiple independent light-emitting regions (first and second regions), each with separate pixel driving circuits. This segmentation allows different horizontal lines in different regions to be driven independently with different driving orders, enabling some regions to compensate for flicker in other regions and achieving overall visual stability.
Solution Approach 2:
The patent implements dynamic driving orders for horizontal lines in different light-emitting regions. The pixel driving circuits can adjust the driving sequence dynamically, switching between different driving orders to optimize display performance and reduce flicker effects during operation.
2Reliability
If conventional inspection methods are used, then manufacturing process is simple, but defects cannot be detected early
Solution Approach 1:
The inspection method performs preliminary detection by driving horizontal lines in different driving orders before final product completion. This allows defects to be detected early in the manufacturing process, enabling timely corrections and improving overall product reliability without requiring complex post-manufacturing inspection systems.
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 configuration reduces the flicker phenomenon and enables early detection of defects in the display device.
Implementation Method 1
a plurality of first light-emitting regions and a plurality of second light-emitting regions in which a plurality of inorganic light-emitting elements are disposed
Data Source
AI summary
A display device and a defect inspection method are disclosed. The display device includes a substrate including a plurality of first light-emitting regions and a plurality of second light-emitting regions in which a plurality of inorganic light-emitting elements are disposed, a first pixel driving circuit disposed in each of the plurality of first light-emitting regions, and a second pixel driving circuit disposed in each of the plurality of second light-emitting regions, wherein a driving order of horizontal lines in the first light-emitting regions is different from a driving order of horizontal lines in the second light-emitting regions.