Foldable Display Sensing Wire for Luminance and Color Compensation
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Solution Overview
Problem
Display apparatuses with foldable panels face challenges in maintaining consistent luminance and color coordinates when the display panel is folded or unfolded, leading to deformation of the display area.
Innovation Solution
A display apparatus with a substrate that is foldable about a folding axis, incorporating a sensing wire with a winding shape and stretchable material, connected to a display driving circuit and sensing circuit that detects the folding state by comparing measured voltages with reference voltages, allowing for real-time adjustment of image display to compensate for changes in luminance and color coordinates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the display panel is folded or unfolded, then the display area can be expanded or contracted, but the luminance and color coordinates of pixels change and image quality deteriorates
Solution Approach 1:
The sensing wire is designed to be stretchable and change shape according to the folding state of the display panel. The wire dynamically adapts its configuration (straight, curved, or wound) to match the panel's deformation, maintaining electrical connection integrity throughout the folding/unfolding cycle and enabling continuous monitoring of the display area for image quality compensation.
Solution Approach 2:
The sensing wire forms a closed loop circuit that detects changes in the display area caused by folding. The sensing circuit monitors the electrical characteristics of the sensing wire and provides feedback signals to the control circuit, which then adjusts the display parameters (luminance, color coordinates) to compensate for deformation and maintain consistent image quality.
2Reliability
If a sensing wire is added to detect folding state, then image quality can be maintained, but device complexity increases
Solution Approach 1:
The sensing wire serves multiple functions: it acts as both a structural element integrated into the display panel and a sensing element that detects folding state. The same wire structure that provides mechanical support or defines display boundaries also functions as the sensing element, eliminating the need for separate dedicated sensing components and reducing overall device complexity.
Solution Approach 2:
The sensing wire is integrated with the existing display panel structure, combining the sensing function with the display structure. The wire is incorporated into the panel's layered construction, merging the mechanical support function with the sensing function, thereby avoiding additional separate sensing components and reducing device complexity.
3Measurement precision
If the sensing wire is made stretchable to accommodate folding, then it can track deformation accurately, but manufacturing precision becomes more difficult
Solution Approach 1:
The sensing wire is designed with variable physical parameters along its length, particularly in its cross-sectional configuration. The wire may have different widths, thicknesses, or material compositions at different locations, allowing it to exhibit controlled stretchability and flexibility in specific regions while maintaining structural integrity elsewhere. This enables the wire to accurately track folding deformation through parameter optimization rather than requiring ultra-precise placement.
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 enables the display apparatus to automatically adjust image display characteristics based on the folding state, ensuring consistent image quality and maintaining optimal luminance and color coordinates across different configurations.
Implementation Method 1
When the display panel is folded or unfolded, the area where images are displayed may expand or contract
Implementation Method 2
the sensing wire may be stretchable and include a material having resistance that changes according to a stretch length
Data Source
AI summary
A display apparatus includes: a substrate including a display area and a peripheral area outside the display area, wherein the substrate is foldable about a folding axis extending in a first direction across the display area; a plurality of pixels in the display area; a first voltage line in the peripheral area; a plurality of second voltage lines in the display area and electrically connected to the first voltage line and the plurality of pixels; a sensing wire adjacent to the folding axis in the display area; and a connection wire in the peripheral area and electrically connected to the sensing wire, wherein the sensing wire comprises a first end and a second end, the first end is electrically connected to the first voltage line, and the second end is electrically connected to the connection wire.