Keyboard Backlight Module With Color Layer for Thin Multi-Color Keys
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Solution Overview
Problem
Conventional lighting keyboards face challenges in heat dissipation due to compact designs, and achieving multiple light colors requires complex processes and higher costs.
Innovation Solution
A backlight module for lighting keyboards comprising a lighting board, light guide panel, and shielding sheet, with light-reducing and diffusion patterns to enhance heat dissipation and illuminate keys with multiple colors efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple light-emitting units are configured to achieve multiple light colors, then the lighting keyboard can display different light colors, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent uses a single light-emitting unit that can emit multiple wavelengths (e.g., UV or blue LED) combined with a plurality of phosphor materials (e.g., yellow, red, green phosphors) on the light guide panel. This allows one light source to generate multiple colors through phosphor conversion, eliminating the need for multiple separate light-emitting units and reducing structural complexity while maintaining color variety
Solution Approach 2:
The patent employs phosphor materials with different emission characteristics (yellow, red, green phosphors) that convert the emitted light from a single wavelength source into multiple colors. The light guide panel is configured with these phosphors to produce different light colors at different regions, achieving color variety without adding multiple light-emitting units
2Length of stationary object
If components are stacked in a small space to achieve thin design, then the computing device becomes thinner, but heat dissipation efficiency deteriorates
Solution Approach 1:
The patent divides the light guide panel into multiple regions, each with different phosphor materials (yellow phosphor region, red phosphor region, green phosphor region). This segmentation allows different functional zones within the compact structure, enabling effective light distribution and heat management in the thin profile by creating distinct thermal and optical zones without increasing overall device thickness
Solution Approach 2:
The patent applies different phosphor materials to different regions of the light guide panel, creating local variations in optical and thermal properties. Each region is optimized for its specific function, allowing the thin structure to manage heat effectively by distributing thermal loads across different material zones rather than using a uniform structure
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
Improves heat dissipation efficiency and reduces light leakage while enabling consistent illumination with multiple colors using a simplified design.
Implementation Method 1
The light of the light emitting unit is guided by the light guide panel to pass through a side of the light-reducing pattern and form a first color light upward from an inner outlet of the first key
Implementation Method 2
The light of the light emitting unit is further guided by the light guide panel to pass through the colored material layer and form a second color light different from the first color light upward from an inner outlet and a boundary of the second key
Data Source
AI summary
A lighting keyboard comprises a first key and a second key, with a gap region between them. A backlight module for the lighting keyboard comprises a lighting board having a light emitting unit, a light guide panel, and a shielding sheet having a light-reducing pattern corresponding to the first key, which are stacked from top to bottom. The backlight module has a colored material layer on the shielding sheet or the light guide panel and vertically overlapping with the gap region. A light of the light emitting unit is guided by the light guide panel to pass through the light-reducing pattern and form a first color light upward from an inner outlet of the first key, and further to pass through the colored material layer and form a second color light different from the first color light upward from an inner outlet and a boundary of the second key.