Multi-functional Keyboard Keystacks with Integrated Capacitive Sensors
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Solution Overview
Problem
Conventional keyboard keys are limited to providing single inputs and lack visual feedback, restricting their functionality and interaction capabilities with electronic devices.
Innovation Solution
The development of multi-functional keystacks that incorporate a keycap, circuitry module, support mechanism, and base, featuring components like light guides, LEDs, flexible circuit boards, and capacitive sensors, allowing for independent input and output functions, including tactile and visual feedback, and the ability to detect multi-touch gestures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional keyboard keys are used, then the structure is simple and manufacturing is easy, but the functionality is limited to single input without visual feedback
Solution Approach 1:
The patent combines multiple functional components (capacitive sensor, dome switch, light guide panel, and keycap) into a single integrated keystack assembly. The capacitive sensor and dome switch are stacked within the same keystack, allowing both touch sensing and mechanical input functions to coexist in one structure, thereby increasing versatility without proportionally increasing overall device complexity
Solution Approach 2:
The keystack is designed to perform multiple functions: capacitive touch sensing for gesture input, mechanical dome switching for traditional key presses, and visual feedback through the light guide panel. This multi-functional design allows a single component to replace what would traditionally require separate devices, enhancing adaptability while managing structural complexity
2Adaptability or versatility
If additional input devices like mice or touchscreens are eliminated, then device portability and simplicity improve, but input capability is restricted
Solution Approach 1:
The keystack serves as a universal input device that can perform multiple input functions traditionally requiring separate devices. The capacitive sensor enables multi-touch gestures, the dome switch provides mechanical input, and the integrated design allows these functions to coexist in a compact form factor suitable for keyboards, thereby enhancing input capability without requiring additional separate input devices
Solution Approach 2:
The input functionality is segmented into distinct operational modes within the same physical structure: capacitive touch zones for gesture recognition, mechanical dome activation for traditional key input, and visual feedback through lighting. This segmentation allows diverse input capabilities to be achieved through a unified input mechanism
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
Enhances keyboard functionality by enabling multiple input modes and providing users with independent visual and tactile information, potentially eliminating the need for additional input devices like mice or touchscreens.
Implementation Method 1
the circuitry module of one or more keystacks may include a capacitive sensor for sensing single or multi-touch gestures provided by a user on each key or across multiple keys of the keyboard
Implementation Method 2
The components of the circuitry can include, for example, a light guide panel ('LGP'), at least one light source
Data Source
AI summary
Multi-functional keyboard assemblies include an array of keys formed from stacked component layers. A top portion of the key may be capable of travelling vertically with respect to a base of the key. The top portion can include a keycap and a circuitry module coupled to the keycap. The keys may be capable of receive at least two distinct types of inputs and/or receiving at least one type of input and providing at least one type of output. Such output may include use of one or more light sources, displays, and/or haptic feedback devices.