Touch Display Wire Segments Reduce Reflection Fringes
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Solution Overview
Problem
Conventional touch display devices experience reduced visibility due to bright and dark fringes caused by different directions of reflected light, resulting from the reflectivity differences between electrode patterns and wire regions in the touch sensing structure.
Innovation Solution
A touch display device design featuring touch electrode patterns with wires formed by connected segments, where the included angle between the sum vector of these segments and the polarization element's absorption axis is optimized to reduce reflection, and the length of wire segments is adjusted to fall within specific spatial frequencies less perceivable to the human eye, combined with polarization elements to absorb reflected light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrode patterns and wire regions are used in the touch sensing structure, then the touch sensing function is achieved, but bright and dark fringes are visible due to reflectivity differences, reducing visibility
Solution Approach 1:
The patent changes the geometric parameters of the wire structure by dividing it into multiple segments with specific length ratios (1:0.3:0.3:0.3) and arranging them at specific angles (0°, 60°, 120°) relative to the polarization axis. This parameter optimization reduces the reflectivity difference between electrode patterns and wire regions, thereby minimizing bright and dark fringes while maintaining touch sensing functionality
Solution Approach 2:
The wire is divided into multiple segments instead of being a single continuous structure. Each segment is positioned at specific angles relative to the polarization axis, which distributes the reflected light more evenly and reduces the formation of distinct bright and dark fringes, thus improving visibility without compromising the electrical connectivity needed for touch sensing
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
This design significantly reduces the brightness of reflected light from electrode patterns and slits, enhancing visibility by minimizing the visibility of bright and dark fringes and improving the overall perception of the touch display device.
Implementation Method 1
The first polarization element is disposed on the first substrate and has a first absorption axis. One of the wires is formed by the connection of a plurality of wire segments, and one of the wire segments is formed by the connection of a plurality of segments. Each of the segments forms a vector by towards the same side, the vectors have a sum vector, and the included angle between the sum vector and the first absorption axis is greater than 0° and less than or equal to 20°.
Data Source
AI summary
A touch display device comprises a first substrate, a second substrate disposed opposite the first substrate, a plurality of touch electrode patterns and a first polarization element. The touch electrode patterns include a plurality of touch electrodes and wires. The wires are electrically connected with the touch electrodes, disposed on the first substrate and arranged along a first direction. The first polarization element is disposed on the first substrate and has a first absorption axis. One of the wires is formed by the connection of a plurality of wire segments, and one of the wire segments is formed by the connection of a plurality of segments. Each of the segments forms a vector by towards the same side, the vectors have a sum vector, and the included angle between the sum vector and the first absorption axis is greater than 0° and less than or equal to 20°.