Light-Sensing Keyboard for Continuous Motion Input
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Solution Overview
Problem
Traditional electro-mechanical keyboards are inefficient for inputting text, as they require mechanical actuation of each key, limiting speed and being prone to damage in environments with moisture or particulate matter.
Innovation Solution
A physical keyboard with light-sensing electrodes under each key, where ambient light obstruction by a finger or stylus is detected to register key selections, allowing for continuous motion input and prediction of words based on key sequences, and equipped with adjustable lighting for low-light environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional electro-mechanical keyboards are used, then text input can be achieved through key presses, but input speed is limited and the keyboard is prone to damage from moisture or particulate matter
Solution Approach 1:
The patent replaces the traditional electro-mechanical switching matrix with a light-based detection system. Light-sensing electrodes detect key presses by measuring changes in light transmission or reflection when a key is pressed, eliminating the need for mechanical switches that are vulnerable to moisture and particulate matter. This optical detection method maintains input speed while significantly improving durability in harsh environments.
2Ease of operation
If traditional electro-mechanical keyboards are used, then key presses can be registered, but the switching matrix is complex and prone to failure
Solution Approach 1:
The patent replaces the complex electro-mechanical switching matrix with a simpler optical detection system using light-sensing electrodes. Each key position has corresponding light-sensing electrodes that detect key presses through optical changes, eliminating the need for complex mechanical switch matrices and reducing failure points while maintaining ease of operation.
Solution Approach 2:
The patent introduces light as an intermediary between the key press action and the detection system. Instead of direct mechanical contact closing circuits, the key press modulates light transmission or reflection, which is then detected by light-sensing electrodes. This intermediary approach simplifies the detection mechanism and reduces mechanical complexity.
3Productivity
If light-sensing electrodes are used to detect key presses, then input speed increases through continuous motion recognition, but the system becomes more sensitive to environmental light conditions
Solution Approach 1:
The patent implements adjustable lighting that serves multiple functions: it illuminates the keyboard for visibility in low-light environments and provides a reference light source for the light-sensing electrodes to detect key presses. This multi-functional lighting system allows the keyboard to operate reliably across varying ambient light conditions while maintaining high input speed through continuous motion recognition.
Solution Approach 2:
The system uses feedback from the light-sensing electrodes to detect changes in light patterns caused by key presses. By continuously monitoring light conditions and comparing them against baseline patterns, the system can distinguish between ambient light changes and actual key press events, maintaining accuracy across different environmental lighting conditions.
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 input speed by allowing continuous motion input and improves durability by preventing moisture and particulate damage, enabling efficient text entry in various conditions.
Implementation Method 1
A physical keyboard may include a plurality of light-sensing electrodes, where individual ones of the light-sensing electrodes correspond to an individual key of the keyboard. A microprocessor coupled to the light-sensing electrodes may determine that light is obstructed (e.g., by an appendage, such as a finger, or by a stylus) to a first particular light-sensing electrode
Data Source
AI summary
A physical keyboard includes a plurality of light-sensing electrodes, where individual ones of the light-sensing electrodes of the plurality of light-sensing electrodes correspond to an individual key of the keyboard. The physical keyboard also includes a microprocessor electrically coupled to individual ones of the light-sensing electrodes. The microprocessor is configured to perform operations including determining that light is obstructed to a first particular light-sensing electrode of the plurality of light-sensing electrodes and sending a signal indicating a selection of a first key corresponding to the first particular light-sensing electrode. The microprocessor is configured to perform operations further comprising determining that the light is obstructed to a second particular light-sensing electrode, and sending a second signal indicating a second selection of a second key corresponding to the second particular light-sensing electrode. The microprocessor is configured to perform operations further comprising predicting a word based on the first and second key.