Concealable Backlit Keycap Structure for Wear-Protected Characters
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Solution Overview
Problem
Conventional keycaps with spray-painted characters on backlit keyboards suffer from character degradation due to rubbing, leading to reduced visibility over time.
Innovation Solution
A character concealable keycap module comprising a transparent first cap structure, a light covering layer with a patterned hollow area, and a second cap structure with lower transmittance, where the transparent character area is not visible without backlight and becomes visible with backlight activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spray painted characters are used on keycaps, then character visibility is achieved, but character durability deteriorates due to rubbing away over time
Solution Approach 1:
The keycap is segmented into multiple layers: a base cap structure, a light covering layer with hollow areas forming characters, and a transparent second cap structure. This segmentation allows the character-forming light covering layer to be protected from direct contact and wear, while still enabling character visibility through light transmission.
Solution Approach 2:
The transparent second cap structure acts as an intermediary protective layer between the user/environment and the light covering layer containing the characters. This intermediary protects the character-defining light covering layer from rubbing while allowing light to pass through for character visibility.
2Loss of information
If a transparent first cap structure with light covering layer is used, then character visibility is improved, but device complexity increases due to additional layers
Solution Approach 1:
The character formation function and the protective cover function are merged into a single integrated keycap structure. The light covering layer with hollow areas both defines the characters and serves as the visible surface, while the transparent second cap structure provides protection without obscuring the characters.
3Shape
If the second cap structure has lower transmittance for aesthetic purposes, then minimalist appearance is achieved, but character visibility when backlight is off is improved, however energy efficiency may be affected
Solution Approach 1:
The second cap structure has differentiated optical properties: it has lower transmittance in areas corresponding to the hollow character areas to maintain minimalist aesthetic when backlight is off, while allowing sufficient light transmission when the backlight is activated to ensure character visibility. This local quality variation optimizes both aesthetics and energy efficiency.
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
Provides long-lasting visibility of characters with a minimalist aesthetic, protecting the light covering layer from wear and tear, ensuring consistent character presentation.
Implementation Method 1
When the backlight module is switched on, light emitted from the backlight module passes through the second cap structure, and the transparent character area is visible through the second cap structure
Implementation Method 2
The first cap structure is made of a transparent material and located above the backlight module
Data Source
AI summary
A character concealable keycap module includes a first cap structure, a light covering layer, and a second cap structure. The first cap structure is made of a transparent material and located above a backlight module. The light covering layer covers the first cap structure and has a patterned hollow area that defines a transparent character area on the first cap structure. The second cap structure has a transmittance lower than that of the first cap structure, and is disposed above the first cap structure to cover the light covering layer. When the backlight module is not switched on, the transparent character area is not visible through the second cap structure. When the backlight module is switched on, light emitted from the backlight module passes through the second cap structure, and the transparent character area is visible through the second cap structure.