Tactile Touch Sensor Physical Overlay Force Transmission
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Solution Overview
Problem
Touch interfaces on devices like smartphones and tablets lack tactile feedback, making them less intuitive and difficult to use effectively, as existing attempts to add haptic feedback often fail to provide adequate tactile sensation.
Innovation Solution
A tactile touch sensor system that uses physical overlays on top of high-resolution force-sensitive touch sensors to provide both visual and tactile feedback, allowing for modular and customizable user interfaces by transmitting forces to the underlying sensor, enabling a wide range of applications from keyboards to musical instruments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If physical overlays are added to provide tactile feedback, then user experience and tactile sensation are improved, but device complexity and structural layers are increased
Solution Approach 1:
The patent introduces physical overlays as intermediary elements between the user's finger and the touch sensor. These overlays contain tactile features (raised edges, patterns, textures) that provide tactile feedback while allowing force transmission to the underlying force-sensitive touch sensor. The overlay acts as a mediator that adds tactile sensation without requiring fundamental changes to the sensor itself.
Solution Approach 2:
The tactile feedback function is segmented from the touch sensor into separate physical overlays. This allows the overlays to be independently designed, manufactured, and replaced without affecting the sensor. Each overlay can be customized with different tactile patterns for different applications (keyboards, musical instruments, etc.), resolving the contradiction by separating the tactile feedback mechanism from the sensing mechanism.
2Adaptability or versatility
If multiple specialized sensors are used for different applications, then application-specific performance is improved, but device complexity and cost are increased
Solution Approach 1:
The patent creates a universal force-sensitive touch sensor platform that can support multiple applications through interchangeable overlays. A single sensor array can function as a keyboard, musical instrument, drawing pad, or other interface depending on which overlay is installed. This resolves the contradiction by making one sensor system perform multiple specialized functions that previously would have required separate dedicated sensors.
Solution Approach 2:
The system dynamically adapts its function by allowing users to swap overlays based on the desired application. The sensor platform remains constant while the overlay configuration changes to match the required functionality. This dynamic reconfigurability provides application-specific performance without requiring multiple fixed-purpose sensor systems.
3Ease of operation
If flexible overlays are used to transmit force, then tactile feedback capability is improved, but manufacturing precision and material requirements are increased
Solution Approach 1:
The patent employs flexible thin film overlays that can be molded or fabricated with raised edges and tactile patterns. These thin films are designed to be sufficiently flexible to allow force transmission to the sensor while maintaining the tactile features on their surface. The flexibility of the thin film material resolves the contradiction by enabling both tactile feedback and effective force transmission without requiring rigid or complex structures.
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 experience by providing intuitive and customizable interfaces with both tactile and visual feedback, increasing usability and reducing the need for multiple sensors, as a single touch sensor can be adapted for various applications with different overlays.
Implementation Method 1
These overlays may be constructed to transmit forces to the underlying FSTS. This force transmission is accomplished by either using a flexible overlay or by fashioning a rigid mechanical overlay such that forces exerted on the overlay by a user are transmitted to the FSTS underneath.
Data Source
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.