Contactless Button Optical Imaging Assembly for Sensitivity
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Solution Overview
Problem
Existing contactless buttons with infrared sensors face challenges in achieving sufficient sensitivity and preventing misactuation, which affects their reliability in generating control signals.
Innovation Solution
A contactless button design featuring a substrate, frame body, first light-emitting unit, optical imaging assembly, and optical switch assembly, where the second light-emitting unit and optical trigger switch are strategically positioned on the substrate and frame body to enhance sensitivity and stability, using an optical diffusion unit to increase the sensing range and prevent misactuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an infrared sensor is used to create a contactless button, then the button can generate control signals without contact, but the sensor容易产生误触发 (prone to misactuation) and sensitivity is difficult to ensure
Solution Approach 1:
The button is divided into multiple independent light-emitting units (first light-emitting unit for display, second light-emitting unit for sensing) and optical trigger switches, each performing specific functions. This segmentation allows the sensing system to be optimized independently for sensitivity while maintaining reliability through functional specialization.
Solution Approach 2:
An optical imaging assembly (including lens array and imaging unit) is introduced as an intermediary between the second light-emitting unit and the optical trigger switch. This intermediary focuses and directs the light beam, enhancing the sensing sensitivity by concentrating the optical signal while preventing misactuation through controlled light path management.
2Reliability
If the second light-emitting unit and optical trigger switch are positioned to maximize sensing range, then the inductive signal can be stably generated, but the structure becomes more complex
Solution Approach 1:
The optical imaging assembly serves multiple functions: it focuses the light beam for enhanced sensitivity, defines the sensing zone to prevent misactuation, and structurally integrates the light-emitting unit and trigger switch positions. This multi-functionality reduces the need for additional components while achieving stable inductive signal generation.
Solution Approach 2:
The second light-emitting unit and optical trigger switch are nested within the frame body structure, with the optical imaging assembly positioned between them. This nested arrangement maximizes the use of available space, enables strategic positioning for optimal sensing range, and maintains a compact overall structure despite the multiple components involved.
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 allows for stable generation of inductive signals with increased sensitivity and reduced misactuation, ensuring reliable operation by expanding the sensing range and improving inductive accuracy.
Implementation Method 1
a first light-emitting unit (4), adapted to emit a first light beam (L1)
Implementation Method 2
The optical imaging assembly (5) is arranged in the frame body (3) and covers the first light-emitting unit (4). The optical imaging assembly (5) is adapted to convert a first light beam (L1) provided by the first light-emitting unit (4) into a three-dimensional optical image (P) projected from the opening (31).
Implementation Method 3
a second light-emitting unit (61) and an optical trigger switch (62), wherein the optical trigger switch (62) is adapted to generate a manipulation signal when sensing a second light beam (L2) generated by the second light-emitting unit (61)
Implementation Method 4
the optical trigger switch (62) is adapted to generate a manipulation signal when sensing a second light beam (L2) generated by the second light-emitting unit (61)
Data Source
AI summary
A contactless button includes a substrate, a frame body, a first light-emitting unit, an optical imaging assembly, and an optical switch assembly. The frame body is mounted on the substrate. The first light-emitting unit is in the frame body. The optical imaging assembly is in the frame body and covers the first light-emitting unit. The optical imaging assembly converts a first light beam provided by the first light-emitting unit into a three-dimensional optical image projected from the opening. The optical switch assembly includes a second light-emitting unit and an optical trigger switch. The optical trigger switch generates a manipulation signal when sensing a second light beam generated by the second light-emitting unit. One of the second light-emitting unit and the optical trigger switch is mounted on the substrate and in the frame body. The other one thereof is mounted on the frame body and next to the opening.