OLED Display Color Filter Array Adjustment for Defective Pixels
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Solution Overview
Problem
OLED display devices face issues with defective light-producing elements, such as short circuits, particle contamination, and manufacturing defects, leading to non-emitting or incorrectly functioning pixels, which result in color distortions and reduced image quality.
Innovation Solution
A method is introduced to compensate for defective light-producing elements by adjusting the position of color filter elements in an OLED display device, allowing the device to produce high-quality images without color distortions, even when one or more light-producing elements are defective, by reconfiguring the color filter array pattern based on the location of defective pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed color filter array pattern is used in OLED display manufacturing, then manufacturing process is simple and fast, but defective pixels cause color distortions and reduce image quality
Solution Approach 1:
The color filter array pattern is made dynamically adjustable rather than fixed. The system can reconfigure which color filter elements are assigned to which pixel locations based on detected defects, allowing the display to adapt to manufacturing variations and maintain high image quality without requiring perfect initial fabrication
Solution Approach 2:
The invention changes the assignment parameters of the color filter array by swapping positions of filter elements. When a defective pixel is detected, the system modifies the mapping between physical filter element positions and logical pixel positions, effectively reassigning color filters to different locations to bypass defective areas and maintain color accuracy
2Manufacturing precision
If defective pixels are left uncorrected, then manufacturing yield is high, but display image quality deteriorates with color distortions
Solution Approach 1:
The invention converts the harmful effect of defective pixels into a beneficial outcome by using the defect information to dynamically reconfigure the color filter array. Instead of discarding displays with defects, the system leverages the defect locations to optimize filter assignments, thereby maintaining high image quality and improving manufacturing yield
Solution Approach 2:
The system implements feedback by detecting defective pixels and using this information to adjust the color filter array configuration. The defect detection results feed into the control logic that determines optimal filter assignments, creating a closed-loop system that continuously optimizes display quality based on actual device performance
Data Source
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AI summary
A method of making an OLED display device for producing an image includes forming an array of light producing elements; testing the array of light producing elements and recording the location of defective light producing element(s); providing a default pattern of the array of color filter elements having at least two different colors; and forming an array of color filter elements in response to the recorded location of the defective light producing element(s), the location of at least one color filter element being changed from the default pattern.