Foldable Display Camera-Based Degradation Compensation
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Solution Overview
Problem
Foldable display devices experience degradation in light emitting diodes due to repeated folding, leading to reduced luminance and distorted images, which existing technologies fail to adequately compensate for.
Innovation Solution
A foldable display device with a built-in camera in the second active area captures a test pattern displayed in the first active area, generating data to compensate for degradation by adjusting the data voltage applied to both active areas, allowing for regular compensation of degradation levels without the need for a separate camera or dedicated compensation time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate camera and dedicated compensation time are provided for degradation compensation, then measurement precision is improved, but device complexity and loss of time increase
Solution Approach 1:
The built-in camera module serves dual purposes: capturing images during normal operation and capturing test patterns for degradation compensation. This eliminates the need for a separate camera system while maintaining compensation precision.
Solution Approach 2:
The degradation compensation function is merged with the normal display operation by using the same camera module and integrating compensation into regular display timing, eliminating dedicated compensation time and reducing system complexity.
2Reliability
If degradation compensation is performed frequently, then reliability is improved, but loss of time increases
Solution Approach 1:
The system performs degradation compensation periodically at predetermined intervals rather than continuously or frequently, maintaining image quality consistency while minimizing time loss by scheduling compensation during natural display cycles.
Solution Approach 2:
The system proactively performs degradation compensation before significant image quality degradation occurs by monitoring at regular intervals and adjusting data voltages in advance, ensuring reliability without requiring frequent corrective actions.
3Manufacturing precision
If data voltage is adjusted frequently for compensation, then manufacturing precision is improved, but productivity decreases
Solution Approach 1:
Data voltage adjustment for degradation compensation is performed periodically at predetermined intervals rather than frequently, maintaining luminance uniformity while minimizing disruption to normal display operation and preserving productivity.
Solution Approach 2:
The system uses feedback from captured test patterns to determine when compensation is necessary, adjusting data voltages only when degradation exceeds thresholds, thereby maintaining precision while avoiding unnecessary adjustments that would reduce productivity.
Data Source
AI summary
A foldable display device may include: a display panel including a first active area, a second active area, and a foldable area between the first active area and the second active area for folding and unfolding the display panel; and a camera in the second active area or overlapping with the second active area. The first active area may be configured to display a test pattern, and the camera may be configured to capture the test pattern to output captured data for compensating a data voltage applied to at least one of the first active area and the second active area of the display panel for displaying an image.