Display Compensation Data Generation for Subpixel Luminance Deviations
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Solution Overview
Problem
Display devices, particularly organic light-emitting displays, suffer from luminance deviations between subpixels due to device characteristic deviations, leading to screen glitches like blotches and image unevenness, which existing technologies struggle to accurately compensate for.
Innovation Solution
A display compensation device and method that generates reference compensation data by photographing display images, correcting image data, and storing it in memory to accurately reflect the panel state at manufacturing, thereby reducing screen glitches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If display devices use organic light-emitting elements and transistors, then the display can be manufactured with current technology, but device characteristic deviations between subpixels cause luminance deviations and screen glitches
Solution Approach 1:
The patent applies preliminary action by measuring and storing compensation values for each subpixel during the manufacturing process. These compensation values are determined in advance to correct for device characteristic deviations, allowing the display to compensate for manufacturing variations without requiring perfect uniformity during production.
Solution Approach 2:
The patent changes the electrical parameters (threshold voltage, mobility) of individual subpixels through compensation mechanisms. By adjusting these parameters based on measured deviations, the system corrects luminance differences between subpixels that arise from manufacturing variations in organic light-emitting elements and transistors.
2Reliability
If compensation processing is performed on all display devices, then screen glitches can be eliminated, but processing time and resources increase
Solution Approach 1:
The patent applies local quality by performing compensation processing selectively only on display devices that exhibit screen glitches or luminance deviations. Instead of uniformly processing all devices, the system identifies problematic areas and applies compensation only where needed, reducing overall processing time while maintaining reliability for affected devices.
Solution Approach 2:
The patent uses partial action by implementing a two-stage compensation approach: first applying general compensation values to all subpixels, then selectively applying additional compensation only to subpixels exhibiting deviations. This partial application of compensation reduces processing complexity compared to full compensation of all subpixels.
3Manufacturing precision
If reference compensation data accurately reflects panel state at manufacturing, then screen glitches can be reduced, but generating such data is challenging due to unexpected conditions
Solution Approach 1:
The patent implements feedback by measuring the actual luminance output of each subpixel and using this information to generate or adjust compensation values. The system continuously monitors display performance and adjusts compensation data accordingly, creating a closed-loop process that improves accuracy despite manufacturing variations and unexpected conditions.
Solution Approach 2:
The patent applies self-service by enabling the display device to automatically generate and store its own compensation values during the manufacturing process. The device uses its own subpixels to measure and determine compensation data, eliminating the need for complex external measurement equipment and simplifying the generation of accurate reference compensation data.
4Measurement precision
If multiple compensation values are stored for each subpixel, then compensation accuracy improves, but memory requirements and data processing complexity increase
Solution Approach 1:
The patent applies segmentation by dividing compensation data into different categories or stages (e.g., initial compensation values, adjusted compensation values, or group-level vs. individual subpixel values). This segmentation allows the system to store multiple compensation values without treating all subpixels uniformly, reducing overall memory requirements by storing detailed data only where necessary.
Solution Approach 2:
The patent merges compensation data by combining individual subpixel compensation values with group-level or panel-level compensation data. This merging allows the system to achieve high compensation accuracy through multiple values while reducing memory requirements by storing compact representations that capture both individual and collective characteristics.
Data Source
AI summary
A display compensation device and display compensation method according to embodiments of the disclosure may generate first compensation data based on a first photographed image produced by photographing a first display image displayed on a display panel, generate second compensation data based on a second photographed image produced by photographing a second display image displayed on the display panel, and generate reference compensation data including the first compensation data and the second compensation data, generating accurate reference compensation data.