Foldable Display Pixel Degradation Compensation via Segmented Sensing
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Solution Overview
Problem
Foldable display devices experience intensified pixel degradation in specific areas due to increased usage, leading to differences in display quality between folded and unfolded sections.
Innovation Solution
Incorporating a first and second sensing line perpendicular to the folding axis in a foldable display panel, coupled to specific pixel lines, to generate sensing data for compensation, which is used by a timing controller to adjust image data and mitigate pixel degradation differences between display areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a foldable display device is used with frequent folding, then portability and flexibility are improved, but pixel degradation in specific areas is intensified
Solution Approach 1:
The display panel is divided into first and second display areas with different sensing line configurations. The first sensing lines are coupled to pixels in the first display area, while the second sensing lines are coupled to pixels in the second display area, allowing independent sensing and compensation for each area's degradation characteristics
Solution Approach 2:
Different sensing lines are configured for different display areas based on their specific degradation needs. The first sensing lines sense current in the first display area while the second sensing lines sense current in the second display area, enabling localized quality adjustment to compensate for area-specific pixel degradation
2Reliability
If sensing lines are added to detect pixel degradation, then display quality consistency is improved, but device complexity increases
Solution Approach 1:
The sensing function is merged with the existing display pixel structure. The sensing lines are integrated into the display panel's existing circuitry, allowing degradation detection to be performed using the same physical infrastructure as the display function itself
Solution Approach 2:
The sensing lines serve multiple functions: they sense the current of pixels in their respective display areas, provide degradation information to the timing controller, and enable compensation for both display areas through a unified sensing and compensation system
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively improves display quality consistency by sensing and compensating for pixel degradation in both display areas, ensuring uniform image presentation across the foldable panel.
Implementation Method 1
a sensing unit coupled to the first sensing line and to the second sensing line, and configured to generate first sensing data by sensing current of the pixels coupled to the first sensing line
Data Source
AI summary
A display device includes a foldable display panel including first and second display areas configured to fold along a folding axis extending in a first direction, a first sensing line coupled to pixels in the first display area, and a second sensing line coupled to pixels in the second display area, a sensing unit coupled to the first and second sensing lines, and configured to generate first and second sensing data by sensing current of the pixels coupled to the first sensing line and to the second sensing line, and a timing controller configured to generate compensation data provided to the pixels in the first and second display areas based on the first and second sensing data, respectively, wherein the first and second sensing lines extend in a second direction that is substantially perpendicular to the first direction, and wherein the first and second sensing lines are alternately arranged.