Optical Input Device Key Configuration for Consistent Tactile Feedback
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Solution Overview
Problem
Conventional keyboards lack consistency in tactile feel across keys due to individual key differences and do not allow users to customize the pressure threshold for each key, leading to suboptimal user experience.
Innovation Solution
A configuration device and method for optical input devices that adjust optical settings to achieve an optimal dynamic range and determine valid input thresholds for each key, ensuring consistent tactile feedback and user customization through parameter and threshold setting units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If individual key structures are used in conventional keyboards, then each key can be manufactured independently, but the tactile feel becomes inconsistent across different keys
Solution Approach 1:
The patent adjusts optical parameters (light intensity, detection sensitivity) for each key's sensing device to compensate for individual structural differences. By changing detection parameters rather than physical structures, the system achieves consistent tactile feedback while maintaining independent key manufacturing benefits
Solution Approach 2:
The patent replaces mechanical tactile feedback mechanisms with optical sensing. Instead of relying on precise mechanical key structures to provide consistent tactile feel, the system uses optical fields to detect key presses, eliminating the need for highly precise mechanical manufacturing while maintaining consistency
2Ease of manufacture
If fixed pressure thresholds are configured in the factory, then production is simplified, but users cannot customize key press pressure according to their preferences
Solution Approach 1:
The patent makes the pressure threshold dynamic and adjustable. Instead of fixed factory-configured thresholds, the system allows users to modify detection thresholds according to their preferences, transforming a static parameter into a dynamic one that adapts to user needs
Solution Approach 2:
The system incorporates feedback mechanisms where users can provide input about their preferred press sensitivity, and the system adjusts the detection thresholds accordingly. This creates a closed-loop system that adapts to user preferences while maintaining the simplicity of initial factory configuration
3Measurement precision
If optical sensing devices are used for each key, then detection precision is improved, but device complexity increases due to individual configuration requirements
Solution Approach 1:
The patent merges the configuration process into a unified system-level operation. Instead of requiring individual manual configuration of each optical sensor, the system performs batch optimization that simultaneously configures all keys, reducing overall complexity while maintaining precise individual detection
Solution Approach 2:
The system performs self-configuration through automated optimization processes. The optical parameters and detection thresholds are automatically adjusted for each key based on measured characteristics, eliminating the need for manual individual configuration and reducing device complexity
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 solution provides consistent tactile feel and customizable responses across keys, enhancing user experience by optimizing the dynamic range and setting valid input thresholds for each key, accommodating individual preferences and habits.
Implementation Method 1
a sensor that is arranged to receive reflected light caused by emitting the light onto the movable unit
Data Source
AI summary
A method for configuring an optical input device is provided. The optical input device includes a movable unit and a sensing device. The movable unit is arranged to move within a predetermined range. The sensing device is arranged to detect a position within the predetermined range at which the movable unit is located. The method includes: adjusting an optical setting of the sensing device to obtain an optimal dynamic range of the sensing device; and configuring a valid input threshold for the optical input device based on the optimal dynamic range.