Touch Screen Wiring Bundle Segmentation for Adjustable Sensor Region
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Solution Overview
Problem
Existing touch screens with checker patterns of column and row wiring block regions have limited flexibility in designing the width of wiring bundles, restricting the adjustment of the sensor region size to match varying display panel sizes.
Innovation Solution
Incorporating compensation regions with floating wirings on the same layer as detection column and row wirings, allowing for staggered arrangement and adjustable widths of wiring bundles, enabling greater design freedom and adjustable sensor region sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If column wiring block regions and row wiring block regions are arranged in a staggered manner forming a checker pattern, then parasitic capacitance between detection wirings is reduced and detection sensitivity is enhanced, but the width of wiring bundles cannot be adjusted freely to match different display panel sizes
Solution Approach 1:
The wiring bundle is segmented into detection wirings and floating wirings. The detection wirings form the functional sensor array in a staggered checker pattern to maximize detection sensitivity, while the floating wirings are inserted as non-functional elements that can be independently positioned. This segmentation allows the floating wirings to act as adjustable spacers that modify the overall bundle width without affecting the detection wiring geometry, thus enabling adaptation to different display panel sizes while maintaining high detection sensitivity.
2Stability of the object's composition
If detection column wirings and detection row wirings are formed of opaque highly conductive material, then transmittance of display light is made uniform and moire fringes are suppressed, but wiring density cannot be increased without increasing parasitic capacitance
Solution Approach 1:
Floating wirings serve as intermediary elements positioned between detection wirings. These floating wirings are formed of the same opaque highly conductive material as the detection wirings, so they contribute to uniforming light transmittance and suppressing moire fringes. At the same time, they act as electrical intermediaries that allow the detection wirings to be spaced closer together without directly increasing parasitic capacitance between adjacent detection wirings, thus enabling higher wiring density while maintaining optical uniformity.
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 configuration enhances the flexibility in designing the widths of wiring bundles, allowing for precise adjustment of the sensor region size to match the display panel size, improving detection sensitivity and reducing parasitic capacitance.
Implementation Method 1
coordinates of a position touched by a pointing body, such as a finger, is specified by detecting the electrostatic capacitance formed between the pointing body and the conductor elements
Implementation Method 2
parasitic capacitance (inter-wiring capacitance) formed between the detection column wirings and the detection row wirings is reduced
Data Source
AI summary
In an intersecting region of a bundle of wirings in a column direction and a bundle of wirings in a row direction, a column wiring block region arranged with detection column wirings and first floating wirings and a row wiring block region arranged with detection row wirings and second floating wirings are disposed in a staggered manner. The bundle of wirings in the column direction includes a first compensation region arranged with the detection column wirings which connect between the detection column wirings in the column wiring block regions adjacent to each other in a diagonal direction. The bundle of wirings in the row direction includes a second compensation region arranged with the detection row wirings which electrically connect between the detection row wirings in the row wiring block regions adjacent to each other in a diagonal direction.