Multi-Region Capacitive Sensing Panel for Gesture and Fingerprint
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Solution Overview
Problem
Conventional touch sensing technologies are limited in their applications due to their simplicity in sensing user touch or gestures, restricting their versatility and flexibility.
Innovation Solution
A multi-functional capacitive-image sensing system is developed, incorporating a first and second capacitive sensing device with distinct characteristics, such as different resolutions or sensing distances, which can be selectively activated based on specific operations, allowing for diverse and flexible sensing applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional touch sensing techniques are used to simply sense user touch or gesture, then the sensing operation is simple and easy to implement, but the application diversity and flexibility are limited
Solution Approach 1:
The sensing panel is divided into multiple regions with different capacitive sensing devices, each having different sensing characteristics (resolution, sensing distance). This segmentation allows each region to be optimized for specific applications, thereby increasing application diversity without requiring complete redesign of the entire sensing system.
Solution Approach 2:
Different regions of the sensing panel are equipped with capacitive sensing devices having different local qualities (different resolutions, different sensing distances). For example, certain regions may have high-resolution sensors for fingerprint detection while other regions have lower-resolution sensors for gesture recognition, allowing each local area to be optimized for its specific function.
2Adaptability or versatility
If multiple capacitive sensing devices with different characteristics are integrated in the same panel, then sensing application versatility is enhanced, but device complexity increases
Solution Approach 1:
The sensing panel is designed as a multi-functional system that can perform multiple sensing operations (fingerprint detection, gesture recognition, touch sensing) using different capacitive sensing devices integrated in the same panel. This universal design allows a single panel to replace multiple separate sensing systems, enhancing versatility while managing complexity through integration.
Solution Approach 2:
The system dynamically switches between different capacitive sensing devices based on the required sensing operation. The control circuit can activate or deactivate specific sensing devices depending on the application scenario, allowing the system to adapt its complexity level to match the current operational requirements.
3Ease of operation
If all capacitive sensing devices are kept in normal working state, then all sensing functions are immediately available, but power consumption increases
Solution Approach 1:
Instead of keeping all capacitive sensing devices continuously active, the system employs periodic or on-demand activation based on the current operation requirements. The control circuit determines when each sensing device needs to be activated and deactivates them when not needed, thereby reducing overall power consumption while maintaining function availability when required.
Solution Approach 2:
The system discards (deactivates) capacitive sensing devices that are not currently needed for the specific operation, and recovers (activates) them only when their specific sensing function is required. This approach minimizes power consumption by ensuring that only the necessary sensing devices are active at any given time.
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 system enables a wide range of sensing applications by allowing different capacitive sensing characteristics to coexist on the same sensing panel, enhancing the versatility and flexibility of touch sensing technologies, while optimizing power consumption by switching devices on and off based on specific operations.
Implementation Method 1
a first capacitive sensing device disposed in a first region of the sensing panel and having a first capacitive-image sensing characteristic; and a second capacitive sensing device disposed in a second region of the sensing panel and having a second capacitive-image sensing characteristic
Data Source
AI summary
A capacitive-image sensing system for use in an information processing system. The information processing system comprises a sensing panel. The capacitive-image sensing system comprises: a first capacitive sensing device disposed in a first region of the sensing panel and having a first capacitive-image sensing characteristic; and a second capacitive sensing device disposed in a second region of the sensing panel and having a second capacitive-image sensing characteristic, wherein the second capacitive-image sensing characteristic is different from the first capacitive-image sensing characteristic. For example, the first capacitive-image sensing characteristic includes a first capacitive-image sensing resolution and/or a first capacitive-image sensing distance from a touch plane of the capacitive-image sensing system, and the second capacitive-image sensing characteristic includes a second capacitive-image sensing resolution and/or a second capacitive-image sensing distance from the touch plane of the capacitive-image sensing system.