Universal Smart Keyswitch Adaptor for Modular Analog Sensing
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Solution Overview
Problem
Existing keyboards with analog keys face increased production costs, system complexity, and keyswitch addressing delays due to integrated sensor technology on the main PCB, limiting flexibility and compatibility with different switch types.
Innovation Solution
A smart keyswitch with integrated analog sensing elements, such as optical, inductive, or magnetic sensors, that can be swapped on a universal keyboard interface, allowing any switch technology to be used without dedicated infrastructure on the main PCB, and includes driving electronics within the keyswitch housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If analog keyswitches with integrated sensor technology are used on the main PCB, then key press detection resolution is improved, but production cost increases
Solution Approach 1:
The patent extracts the sensor technology and driving electronics from the main PCB and relocates them into self-contained keyswitch units. Each keyswitch becomes an independent module with integrated sensing capabilities, allowing the main PCB to serve only as a mounting platform and communication interface. This extraction reduces the complexity and cost of the main PCB while maintaining high measurement precision through the dedicated sensor systems in each keyswitch.
Solution Approach 2:
The patent segments the keyboard system into independent keyswitch modules, each functioning as a discrete unit with its own sensor and electronics. This segmentation allows for modular manufacturing where keyswitches can be produced separately and assembled onto the keyboard, reducing overall production cost while maintaining the precision benefits of analog sensing in each individual module.
2Measurement precision
If analog keyswitches with integrated sensor technology are used on the main PCB, then key press detection resolution is improved, but system complexity increases
Solution Approach 1:
By extracting the sensor technology and driving electronics from the main PCB and embedding them within each keyswitch, the patent simplifies the overall system architecture. The main PCB becomes a simple mounting structure with basic communication interfaces, while each keyswitch operates as an autonomous unit. This extraction reduces system complexity by eliminating the need for complex sensor integration and signal routing on the main PCB.
3Measurement precision
If analog keyswitches with integrated sensor technology are used on the main PCB, then key press detection resolution is improved, but keyswitch addressing delay increases
Solution Approach 1:
Each keyswitch unit operates autonomously with its own sensor and driving electronics, enabling self-service operation without requiring complex addressing sequences from the main PCB. The independent architecture allows keyswitches to process and report key press events independently, significantly reducing addressing delays while maintaining the high measurement precision of analog sensing.
4Reliability
If dedicated infrastructure on the main PCB is used for each switch type, then switch performance is optimized, but adaptability to different switch types decreases
Solution Approach 1:
The patent creates a universal keyswitch interface where all keyswitches, regardless of their internal sensor technology or mechanical design, connect to the main PCB through a standardized interface. This universal design allows different switch types to be interchanged without requiring dedicated infrastructure on the main PCB, maintaining adaptability while preserving the optimized performance of each switch type through its self-contained electronics.
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
Enables flexible and cost-effective use of various switch technologies on a single keyboard, reducing production complexity and addressing delays by integrating sensing directly within the keyswitch, facilitating hot swapping and maintaining compatibility with galvanic switches.
Implementation Method 1
When the motion sensor system includes an optical sensor, the substrate can include a light emitting element and a light detection element, wherein (1) the plunger includes a shutter that blocks an amount of light from the light emitting element from reaching the light detection element based on the position of the plunger along the range of motion; or (2) the plunger includes a reflector that reflects an amount of light from the light emitting element on to the light detection element based on the position of the plunger along the range of motion.
Implementation Method 2
When the motion sensor system includes an inductive sensor, the substrate can include: a current driver; and an inductive coil driven by the current driver, wherein the plunger includes an electrically conductive element, and wherein a magnetic field produced by the inductive coil changes based on the position of the plunger along the range of motion.
Implementation Method 3
When the motion sensor system includes a magnetic sensor, the substrate can include: a Hall Effect sensor or tunneling magnetoresistance (TMR) sensor, wherein the plunger includes a magnet, and wherein a strength of a magnetic field produced by the magnet detected by the Hall Effect or TMR sensor changes based on the position of the plunger along the range of motion.
Data Source
AI summary
A key structure comprising a housing, a plunger extending from a top side of the housing and configured to be depressed and travel along a range of motion, a motion sensor system, and driving electronics, all contained within the housing, the sensor system configured to detect movement of the depressible plunger along the range of motion and generate corresponding travel data. One or more processors can be configured to determine a position of the plunger along the range of motion based on the travel data.