Touch-Sensing Module With Same-Side Pads for Symmetrical Frame
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Solution Overview
Problem
The complexity of interpreting circuit algorithms for capacitive touch-sensing panels is increased by the presence of triangular sensing pads, making it difficult to accurately predict touch positions and resulting in inefficient use of space and asymmetrical frame designs.
Innovation Solution
A touch-sensing module design where first and second sensing strings have conductive lines with pads connected to the same side, forming electrical reference nodes, simplifying the algorithm for interpreting signals and allowing for more efficient use of space by locating pads at the ends of the conductive lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If triangular sensing pads are used at four sides of the touch-sensing panel, then the sensing pads can be distributed in the rectangular space, but the algorithm complexity of the interpreting circuit is increased and touch-sensing position accuracy deteriorates
Solution Approach 1:
The patent removes the triangular sensing pads from the four sides of the touch-sensing panel, extracting the problematic elements that caused increased algorithm complexity and position prediction difficulties. This leaves only the rhomboidal sensing pads in the center area, simplifying the interpreting circuit algorithm while maintaining effective sensing coverage.
Solution Approach 2:
Instead of placing sensing pads at the four corners (triangular shape) as in conventional designs, the patent inverts the approach by positioning all sensing pads at the center area with rhomboidal shape, connecting them to conductive lines that extend to the edges. This reversal of the conventional layout simplifies the sensing algorithm.
2Area of stationary object
If triangular sensing pads are used at four sides, then sensing coverage is achieved, but the front frame cannot form a symmetrical shape and frame edge width becomes too wide
Solution Approach 1:
The patent eliminates the asymmetric triangular sensing pads at the four corners, which prevented the front frame from achieving symmetry. By using only rhomboidal sensing pads at the center, the design achieves better symmetry in the front frame structure while maintaining adequate sensing coverage through the central pad arrangement.
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 simplifies the algorithm complexity, enhances touch position accuracy, and allows for a more symmetrical and aesthetically pleasing frame by optimizing the placement of sensing pads and traces, thereby reducing production costs and improving user interface usability.
Implementation Method 1
The capacitive type of the touch-sensing panel in the related art includes a number of first touch-sensing strings and a number of second touch-sensing strings crossing with each other. Each of the sensing strings has a number of rhomboidal sensing pads that are serially connected.
Data Source
AI summary
A touch-sensing module including a plurality of first sensing strings and a plurality of second sensing strings is provided. Each of the first sensing strings includes a first strip-shaped conductive line and a plurality of first sensing pads connected to a same side of the first strip-shaped conductive line. Each of the second sensing strings includes a second strip-shaped conductive line and a plurality of second sensing pads connected to a same side of the second strip-shaped conductive line. The first strip-shaped conductive lines of the first sensing strings cross the second strip-shaped conductive lines of the second sensing strings. A crossing position of each of the first strip-shaped conductive lines and each of the second strip-shaped conductive lines forms an electrical reference node.