Foldable Induction Sensor Coil Layout With Serial Loop Connection
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Solution Overview
Problem
The degradation of electrode conductors in foldable mobile devices with electromagnetic induction type coordinate input units occurs due to repeated bending, leading to an increase in the number of drive circuit channels and power consumption.
Innovation Solution
The sensor is configured with loop coils arranged in multiple areas, where specific loop portions in different areas are serially connected, allowing them to be driven as a single channel, reducing the number of drive circuit channels and preventing conductor degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sensor body is divided into two sensors at the bending portion to prevent conductor degradation, then the reliability is improved, but the device complexity increases due to needing twice as many drive circuit channels
Solution Approach 1:
The sensor body is divided into two sensor bodies at the bending portion, with each containing loop coils arranged in respective first and second areas. This segmentation prevents conductor degradation by avoiding repeated bending of a single continuous conductor, thereby improving reliability while maintaining manageable complexity through modular design
Solution Approach 2:
Loop coils are configured by serially connecting a first loop portion in the first area with a second loop portion in the second area. This merging allows two separate sensor bodies to be driven as a single channel, reducing the number of drive circuit channels needed and thereby decreasing device complexity
2Adaptability or versatility
If two separate sensors are used to accommodate foldable structure, then the adaptability is improved, but the power consumption increases due to driving each loop coil independently
Solution Approach 1:
The sensor is divided into two sensor bodies adapted to the foldable structure, with loop coils arranged in first and second areas respectively. This segmentation enables the sensor to accommodate the foldable structure while reducing power consumption through the serial connection configuration
Solution Approach 2:
The first loop portion and second loop portion are serially connected to form a single loop coil that can be driven by one channel. This merging reduces the number of drive channels needed, thereby decreasing power consumption while maintaining adaptability to the foldable structure
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 prevents conductor degradation and reduces the scale of the drive circuit, thereby saving power and maintaining functionality in foldable mobile devices.
Implementation Method 1
a sensor adapted advantageously for use with a coordinate input unit operated by electromagnetic induction
Data Source
AI summary
Provided is a sensor including loop coils arranged in multiple areas, in which a specific loop coil among the loop coils includes a first loop portion in a first area serially connected with a second loop portion in a second area different from the first area within the multiple areas.