Micro OLED Detection Electrode for Electrical Performance Monitoring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current micro OLED displays face challenges in monitoring electrical characteristics, such as critical turn-on voltage and leakage current, which can lead to defects that affect performance over time, especially in the near-eye display field of VR and AR.
Innovation Solution
A display substrate with a detection region and detection electrodes connected to the light-emitting elements and pixel circuits via detection lead wires, allowing for the detection of electrical performance through a detection circuit that includes control units and storage units to analyze the light-emitting elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If detection electrodes and detection lead wires are added to monitor electrical characteristics, then reliability is improved, but device complexity increases
Solution Approach 1:
The detection electrode serves multiple functions: it acts as both a standard electrode for device operation and a detection electrode for monitoring electrical characteristics. The detection lead wire also serves dual purposes as both a signal transmission line and a measurement conduit, reducing the need for separate dedicated detection components.
Solution Approach 2:
The detection circuit utilizes the existing electrode and lead wire structures to perform self-diagnosis and monitoring of electrical characteristics. The system monitors its own operational parameters through the integrated detection electrodes without requiring external monitoring equipment, enabling autonomous reliability assessment.
2Measurement precision
If detection lead wires are extended to connect detection electrodes with external circuits, then measurement capability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The detection lead wire acts as an intermediary element that bridges the detection electrode and external detection circuits. By providing a standardized interface and connection path, it simplifies the manufacturing process while maintaining measurement precision, as the lead wire serves as a controlled intermediate component rather than requiring direct precision connections between all elements.
Data Source
AI summary
A display substrate includes a base substrate including a display region and a peripheral region located on at least one side of the display region. The display region is provided with a plurality of sub-pixels, and at least one of the plurality of sub-pixels includes a light-emitting element and a pixel circuit for driving the light-emitting element. The peripheral region includes a detection region, and the detection region is provided with at least one detection electrode which is electrically connected with a first electrode of the light-emitting element and the pixel circuit through a detection lead wire, to detect electrical performance of the light-emitting element through the detection electrode in a detection stage.