Laminated Card User Interface with Support Structure
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Solution Overview
Problem
Laminated cards with user interfaces, such as those containing batteries and circuitry, often fail to provide reliable functionality and tactile feedback due to the lamination process, which can crush or flatten buttons, rendering them inoperable.
Innovation Solution
A laminated card design incorporating a dual-layer user interface, a structural support, a durometer-specific material covering the user interface, and an adhesive layer that prevents gas egress during lamination, along with a bladder for gas displacement, ensures reliable operation and tactile feedback by distributing force and allowing for deflection during input events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the card is laminated to protect the circuit board and components, then the card's durability and protection are improved, but the user interface buttons become unreliable and lose tactile feel
Solution Approach 1:
The user interface is divided into multiple layers including a first element mounted to the circuit board and a second element that engages the first element during input events. This segmentation allows each layer to be optimized independently - the first element can be rigid for structural support while the second element can be compliant for tactile feedback, and the layered structure protects the interface during lamination.
Solution Approach 2:
The patent employs composite material structures where the user interface combines materials with different mechanical properties. The first element uses a rigid material for structural integrity, while the second element uses a softer, more compliant material to provide tactile feedback. This composite construction allows the interface to withstand lamination pressures while maintaining button functionality and tactile feel.
2Strength
If a rigid structure is used to support the user interface, then structural stability is improved, but deflection during input events is reduced causing loss of tactile feedback
Solution Approach 1:
The structural support is designed with local quality variations where different regions have different rigidity characteristics. The support structure provides rigid anchoring at the circuit board interface for stability, while incorporating compliant regions or flexible elements in areas that contact the user interface during input events. This allows the support to maintain overall structural integrity while permitting localized deflection for tactile feedback.
Solution Approach 2:
The support structure incorporates dynamic characteristics by allowing controlled deflection during input events rather than being completely rigid. The structure can flex or deform elastically in response to button presses, providing tactile feedback to the user, then returns to its original position. This dynamic behavior balances structural stability with operational feedback.
3Ease of operation
If the user interface material is made compliant to provide tactile feel, then tactile feedback is improved, but the material may be damaged or crushed during lamination
Solution Approach 1:
The patent implements beforehand cushioning by positioning the rigid first element beneath the compliant second element before the lamination process. This first element acts as a protective cushion or support structure that prevents the softer second element from being crushed or damaged during lamination. The compliant material can still provide tactile feedback because it is supported by the rigid layer underneath, and the entire assembly is protected by the lamination process itself.
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
The design enables reliable and tactile user interface functionality in laminated cards by mitigating deflection and maintaining tactile feedback, preventing vacuum formation, and ensuring proper operation during the lamination process.
Implementation Method 1
The adhesive layer may provide an air-tight seal that prevents or substantially limits egress of any gas from the user interface during, for example, a lamination process
Implementation Method 2
This material may have a durometer value less than the durometer value of a lamination material that may be fixed to the material that is at least partially covering the user interface. This permits the material to flex relative to the lamination material during an input event
Implementation Method 3
The user interface and the bladder may be fluidically coupled such that, during an input event, gas displaced by the user interface is routed to the bladder
Data Source
AI summary
Laminated cards with user interfaces are provided. The user interfaces can have enhanced tactile feel. In one embodiment, a card may be constructed to have a dual-layer user interface. In another embodiment, a card may be constructed to include a support structure. In yet another embodiment, a card may include a relatively soft material that covers at least a portion of the user interface. In yet another embodiment, a card may include a user interface that is fluidically coupled to a bladder. In a further embodiment, a card can include any combination of a user interface, which may be a dual-layer user interface, a support structure, a soft material that at least partially covers a user interface, and a bladder.