Display Manufacturing System Saturation Voltage Lifetime Prediction
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Solution Overview
Problem
Current display manufacturing processes are inefficient in predicting and compensating for the lifetime distribution of display devices, leading to increased manufacturing time and reduced productivity.
Innovation Solution
A display manufacturing system that measures driving power voltage to predict lifetime distribution and calculates a degradation weight value, using a processor to control display panels based on current density and luminance, thereby compensating for afterimages and improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional lifetime prediction methods are used in display manufacturing, then measurement precision is improved, but manufacturing time increases and productivity decreases
Solution Approach 1:
The patent applies preliminary action by measuring the saturation voltage of the light emitting element during the manufacturing process itself, before the display device is fully assembled and shipped. This allows lifetime distribution prediction to be performed in advance, eliminating the need for time-consuming post-manufacturing testing and validation procedures, thereby reducing overall manufacturing time while maintaining prediction accuracy
Solution Approach 2:
The patent extracts the key parameter measurement (saturation voltage) from the complex conventional testing procedures. By focusing only on measuring the saturation voltage of the light emitting element during manufacturing, the system obtains sufficient data for lifetime prediction without performing exhaustive lifetime testing, thus significantly reducing measurement time while preserving prediction precision
2Measurement precision
If conventional lifetime prediction methods are used, then measurement precision is improved, but manufacturing time is increased
Solution Approach 1:
The system performs lifetime prediction measurements during the manufacturing process itself rather than after completion. By measuring saturation voltage at this preliminary stage, the patent eliminates the need for extended post-manufacturing observation periods, thereby reducing the time loss associated with traditional lifetime testing methods while maintaining prediction accuracy
Solution Approach 2:
The patent skips the time-consuming conventional lifetime testing process by using saturation voltage measurements as a proxy indicator. This allows the system to rush through the manufacturing process with minimal additional measurement time, obtaining lifetime predictions without undergoing the lengthy traditional testing procedures that would otherwise be required
Data Source
AI summary
A display manufacturing system includes: a plurality of display devices, each including a display panel which displays an image; a driving voltage measurer which calculates a saturation voltage corresponding to a luminance of the image displayed on the display panel by changing a driving power voltage for driving the display panel; and a processor which calculates a current density and a degradation weight value based on the saturation voltage, and controls the display panel included in each of the plurality of display devices based on the current density and the degradation weight value.