Force-Sensitive Touch Sensor With Physical Overlay
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Solution Overview
Problem
Modern touch interfaces on devices like smartphones lack tactile feedback, making interactions less intuitive and less efficient, as existing attempts to add haptic feedback often fail to provide adequate tactile sensations.
Innovation Solution
The implementation of a high-resolution force-sensitive touch sensor system that can be physically augmented with various overlays, such as flexible or rigid mechanical components, to provide both tactile and visual feedback, allowing for modular and customizable user interfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If visual feedback is provided through displays in modern touch interfaces, then information delivery is improved, but tactile feedback is lost making interactions less intuitive
Solution Approach 1:
The patent combines visual display and tactile feedback into a single integrated touch-sensitive surface. The display screen itself becomes force-sensitive, allowing users to receive both visual information and tactile feedback from the same interface element, eliminating the need to choose between visual clarity and tactile intuitiveness
Solution Approach 2:
The touch-sensitive display serves multiple functions simultaneously: it provides visual output, detects touch location, measures applied force, and delivers tactile feedback. This multi-functional approach allows a single interface to replace what would traditionally require separate visual and tactile components
2Ease of operation
If force-sensitive buttons are used with flexible membranes, then tactile feedback is provided, but the interface requires fixed physical buttons and membranes for each function
Solution Approach 1:
The interface is segmented into a high-resolution array of independent force-sensitive sensors rather than using fixed physical buttons. Each sensor in the grid can be independently activated, allowing the same physical surface to be reconfigured for different functions through software without requiring physical membrane changes
Solution Approach 2:
The interface transitions from static physical buttons to dynamic virtual buttons that can be repositioned and reconfigured on the touch-sensitive surface. The force-sensitive grid allows buttons to be defined by software at any location and size, providing dynamic adaptability while maintaining tactile feedback through force sensitivity
3Adaptability or versatility
If discrete force-sensitive buttons are replaced with high-resolution force sensor arrays, then versatility and customization are improved, but the need for physical augmentation components is increased
Solution Approach 1:
A thin flexible membrane serves as an intermediary layer that transmits user-applied forces to the force-sensitive sensor array underneath. This membrane allows physical contact and force transmission while maintaining the high-resolution digital sensing capability, bridging the gap between physical interaction and digital detection
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 approach enhances user interaction by offering intuitive and customizable interfaces that provide both tactile and visual feedback, increasing usability and reducing the need for multiple dedicated sensor interfaces, while allowing for a wide range of applications from standard keyboards to musical instruments.
Implementation Method 1
high-resolution force-sensitive touch sensor
Data Source
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AI summary
A tactile touch sensor (TTS) system and method allowing physical augmentation of a high-resolution touch sensor array (TSA) is disclosed. Physical augmentation is accomplished using a TSA physical overlay (TPO) placed on top of the TSA. The TPO is constructed to transmit forces to the underlying TSA. Force transmission is accomplished by either using a flexible overlay or with a rigid mechanical overlay that transmits user forces exerted on the overlay to the underlying TSA. Incorporation of TPO identifiers (TPI) within the TPO permits identification of the TPO by a TPO detector (TPD) allowing operational characteristics of the TSA to be automatically reconfigured to conform to the currently applied TPO structure by a user computing device (UCD). The UCD may be configured to automatically load an appropriate application software driver (ASD) in response to a TPI read by the TPD from the currently applied TPO.