Curvable Pixel Display Brightness Compensation
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Solution Overview
Problem
Pixel-addressable displays with curved or foldable configurations suffer from non-uniform brightness due to changes in curvature, leading to suboptimal image viewing experiences, as pixel elements at curved areas exhibit varying efficiency compared to flat areas.
Innovation Solution
A pixel-addressable display with a curvable substrate and a control circuit that adjusts the brightness of pixel elements based on the curvature of the substrate, ensuring consistent brightness across all areas by compensating for increased or decreased efficiency at convex and concave curvatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display is made curvable or foldable to improve adaptability and versatility, then the display can be bent or folded to different configurations, but non-uniform brightness occurs at curved areas due to changed pixel element efficiency
Solution Approach 1:
The patent applies local quality by implementing curvature detection and compensation specifically at the hinge area where curvature occurs, rather than treating the entire display uniformly. The control circuit detects curvature at the hinge area and adjusts pixel element driving parameters locally at curved regions to compensate for efficiency changes, maintaining brightness uniformity only where needed while preserving the flexible display's adaptability.
Solution Approach 2:
The patent changes the driving parameters of pixel elements based on detected curvature. When curvature is detected at the hinge area, the control circuit modifies parameters such as driving voltage or current to compensate for efficiency changes in pixel elements at curved regions, thereby maintaining uniform brightness across the display while allowing curvature flexibility.
2Adaptability or versatility
If pixel elements are mounted at curved hinge areas to enable folding, then the display can be bent, but the pixel elements exhibit increased or decreased efficiency leading to non-uniform brightness
Solution Approach 1:
The patent implements a feedback mechanism where a curvature sensor detects the curvature state of the hinge area and provides this information to the control circuit. The control circuit then adjusts pixel element driving parameters based on this feedback to compensate for efficiency changes, ensuring brightness consistency while maintaining folding capability.
Solution Approach 2:
The patent performs preliminary curvature detection before displaying images. The curvature sensor detects the hinge area curvature in advance, and the control circuit pre-adjusts pixel element driving parameters based on this detected curvature state, ensuring that brightness uniformity is maintained from the start of image display while preserving the folding functionality.
3Illumination intensity
If the display maintains rigid flat structure to ensure uniform brightness, then brightness is consistent across the display, but the display cannot be bent or folded
Solution Approach 1:
The patent segments the display into a hinge area and non-hinge areas. The curvature sensor is positioned at the hinge area to detect curvature, and the control circuit applies compensation specifically to pixel elements in the curved hinge region. This segmentation allows the display to maintain brightness uniformity at curved areas while preserving flexibility and foldability that would be impossible in a completely rigid flat structure.
Data Source
AI summary
A control circuit of a pixel-addressable display corrects a brightness of a pixel element of a pixel circuit of the display based on a curvature of a curvable area of the display. The control circuit selectively applies data line voltages to the pixel circuit. The pixel circuit applies a driving voltage to the pixel element based on the data line voltages.