Electroluminescence Display Defective Pixel Management
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Solution Overview
Problem
Electroluminescence displays face challenges in managing progressive defects in driving elements after product shipment, as existing technologies lack real-time detection and management capabilities for defective pixels.
Innovation Solution
An electroluminescence display system that includes a compensation part to detect and manage defective pixels by sensing the electrical characteristics of driving elements, setting compensation values, and storing information in memory, allowing for real-time detection and reporting of defective pixels and potential defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If real-time sensing of driving element electrical characteristics is implemented, then defective pixel detection capability is improved, but device complexity increases
Solution Approach 1:
The sensing part is integrated into the existing display driving circuitry, allowing the same hardware to serve both normal display operation and defective pixel detection functions. The compensation part uses the sensed electrical characteristics for both compensation purposes and defect detection, eliminating the need for separate dedicated detection circuits.
Solution Approach 2:
The display system performs self-diagnosis by using its own driving elements and circuitry to sense and detect defective pixels. The system monitors its own electrical characteristics and automatically identifies defects without requiring external testing equipment or additional complex detection infrastructure.
2Reliability
If comprehensive defective pixel information is stored and managed, then product reliability monitoring is improved, but information management complexity increases
Solution Approach 1:
The system continuously senses electrical characteristics, compares them against reference values, and provides feedback to identify defective pixels. This feedback mechanism enables automatic detection and reporting of defects, reducing the need for manual inspection and complex information management procedures.
Solution Approach 2:
The system stores reference electrical characteristic values during normal operation before defects occur. These pre-stored reference values are used to compare against future measurements, enabling early detection of defects and allowing the system to proactively identify pixels that may become defective due to degradation over time.
Data Source
AI summary
An electroluminescence display and a method of managing defective pixels thereon are provided. Defective pixels are detected from the pixels, based on sensing results on the electrical characteristics of a driving element, and defect candidates are selected from among the pixels within a compensation range in which the electrical characteristics of the driving element can be compensated by a compensation value obtained based on the sensing results on the electrical characteristics of the driving element.