OLED Drive Method Skipping Detection for Low Luminance Rows
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Solution Overview
Problem
The light emission during OLED inspection in existing display devices is easily visually recognized, affecting display quality and user experience.
Innovation Solution
A drive method for a display device that includes a pixel matrix with a target row determination step, luminance calculation, and characteristic detection, where the characteristic detection is performed only if the representative luminance of a pixel row exceeds a threshold, skipping detection in cases where it does not.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If characteristic detection is performed for all pixels to ensure quality control, then measurement precision is improved, but light emission becomes visually recognizable and display quality deteriorates
Solution Approach 1:
The patent applies local quality by differentiating detection behavior based on pixel location and luminance characteristics. Pixels are categorized into different groups (e.g., normal pixels, defect pixels, pixels in different luminance ranges) and subjected to appropriate detection strategies. This allows precise characteristic detection for pixels that need it while avoiding unnecessary light emission from pixels that don't require inspection, thereby resolving the contradiction between measurement precision and light emission visibility.
Solution Approach 2:
The patent implements partial action by performing characteristic detection only on specific pixels rather than all pixels. By calculating representative luminance values and comparing them against thresholds, the system selectively applies detection only where necessary (e.g., when luminance exceeds certain thresholds or for specific pixel types), achieving sufficient measurement precision while minimizing overall light emission that would be visually recognizable.
2Productivity
If inspection patterns are displayed at one frame per second to enable current measurement, then productivity is improved, but light emission is easily visually recognized
Solution Approach 1:
The patent applies periodic action by implementing inspection at specific frame intervals (e.g., one frame per second) while using luminance threshold calculations to determine whether characteristic detection should occur. This periodic inspection approach maintains productivity by ensuring regular quality checks while the luminance-based conditional detection reduces unnecessary light emission, preventing visual recognition of inspection patterns by users.
Data Source
AI summary
A drive method according to the disclosure includes a target row determination step of determining a target row to which a target pixel for which a characteristic of at least one of a drive transistor and an electro-optical element is detected belongs, a luminance calculation step of calculating a representative luminance of a pixel in the target row, and a detection determination step of performing a characteristic detection step of detecting monitoring data indicating the characteristic of at least one of the drive transistor and the electro-optical element of the pixel belonging to the target row in a case where the representative luminance is greater than or equal to a threshold, and skipping the characteristic detection step in a case where the representative luminance is less than the threshold.