OLED Driving System Current Range Usage Tracking
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Solution Overview
Problem
Existing OLED driving systems face inaccuracies in estimating deterioration due to the reliance on voltage feedback, which does not account for the reduction in radiance based on electric current applied to OLEDs, leading to potential misidentification of issues in machine vision systems.
Innovation Solution
An OLED driving system and method that stores usage information for each electric current range, updating the accumulated actual usage time and using correlation information to estimate luminance and lifetime, allowing for more accurate deterioration assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If voltage feedback is used to estimate OLED deterioration, then the estimation process is simple, but the accuracy of deterioration estimation deteriorates
Solution Approach 1:
The patent changes the parameter used for deterioration estimation from voltage feedback to electric current values. By categorizing operation time into multiple electric current ranges (first through sixth ranges) and accumulating usage time for each range, the system achieves more accurate deterioration estimation while maintaining operational simplicity through automated processing.
2Measurement precision
If accumulated usage time is tracked across multiple electric current ranges, then deterioration estimation accuracy improves, but system complexity increases
Solution Approach 1:
The patent segments the operation time into multiple electric current ranges (first through sixth ranges) based on the magnitude of electric current values. Each range has its own accumulated usage time counter, allowing the system to track deterioration characteristics across different operating conditions without requiring complex real-time calculations.
Solution Approach 2:
The patent pre-establishes multiple electric current ranges and their corresponding accumulation mechanisms before operation begins. This preliminary structuring allows the system to automatically accumulate and categorize usage time without requiring complex decision-making or calculation during actual operation, thereby reducing real-time system complexity.
Data Source
AI summary
An OLED driving system and an OLED driving method according to the present invention include: storing usage information representing an accumulated actual usage time of an OLED lighting device with respect to each of a plurality of electric current ranges different from one another in a usage information storage part; updating the accumulated actual usage time by adding an actual usage time of the OLED lighting device to the accumulated actual usage time stored in the usage information storage part and represented as the usage information with respect to a specific electric current range corresponding to an electric current value of an electric power output to the OLED lighting device; and storing the updated accumulated actual usage time.