Touch Screen Proximity Pointer and Grip Sensor
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Solution Overview
Problem
Current portable electronic devices with touch screens face challenges in providing intuitive and efficient operation, particularly when users attempt to interact with the screen while gripping the device, leading to potential malfunctions due to unintentional proximity touches.
Innovation Solution
The implementation of a proximity touch recognition system that allows users to interact with the touch screen without direct contact, using a capacitive or resistive touch panel that senses finger proximity, enabling hovering inputs and displaying a pointer for selection and control, while a grip sensor prevents unintended interactions during handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a touch screen is used for portable electronic devices, then user interaction capability is improved, but unintentional touches during gripping cause malfunctions
Solution Approach 1:
The touch screen is divided into multiple sensing regions including a grip detection region separate from the main interaction area. This segmentation allows the system to distinguish between intentional touches in the interaction area and unintentional touches in the grip region, preventing malfunctions while maintaining ease of operation.
Solution Approach 2:
A grip sensor acts as an intermediary between the user's hand and the touch screen processing system. The sensor detects gripping actions and provides this information to the controller, which then adjusts touch recognition behavior accordingly, preventing unintentional touches from causing malfunctions.
2Measurement precision
If direct contact touch input is used, then input precision is improved, but user comfort during handling is reduced
Solution Approach 1:
The touch input system dynamically adjusts its behavior based on the detected grip state. When gripping is detected, the system switches to a mode that requires more deliberate touch actions, providing both precision and comfort by adapting to the user's handling state rather than requiring constant direct contact.
Solution Approach 2:
The system changes operational parameters such as touch threshold sensitivity and gesture recognition criteria based on the detected grip state. This allows precise input recognition when needed while maintaining comfort during normal handling by adjusting the parameters that govern touch detection.
3Ease of operation
If proximity touch recognition is implemented, then user comfort is improved, but input precision may be reduced
Solution Approach 1:
Different regions of the touch screen have different quality characteristics. The grip detection region uses proximity sensing for comfort, while the main interaction area uses more precise direct contact detection. This local differentiation maintains both comfort and precision in their respective zones.
Solution Approach 2:
The system provides feedback by displaying visual indicators such as a grip icon when gripping is detected, and adjusting touch response based on the proximity detection data. This feedback loop allows the system to maintain precision by confirming detected inputs while preserving user comfort through non-contact operation.
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 solution provides a more intuitive user interface by allowing non-contact interactions and preventing device malfunctions caused by unintentional touches, enhancing the usability and reliability of portable electronic devices with touch screens.
Implementation Method 1
using a capacitive or resistive touch panel that senses finger proximity
Implementation Method 2
using a capacitive or resistive touch panel that senses finger proximity
Implementation Method 3
a grip sensor prevents unintended interactions during handling
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
A method of operating a touch screen and an electronic device thereof are provided. The method includes the operations of sensing an object approaching the touch screen, and displaying a pointer at a predetermined position of the touch screen in response to the object.