Keyboard Backlight Module with Regional Light Guide Hole Spacing
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Solution Overview
Problem
Existing lighting keyboards face issues with inconsistent illumination, where the main symbol above the LED is over-illuminated, the corner symbols of keycaps are too dark, and the overall illuminating consistency on single and plural keyswitches is poor.
Innovation Solution
A backlight module for lighting keyboards comprising a lighting board, light guide panel, and shielding sheet, with specific arrangements of light emitting units, microstructure regions, and translucent regions to enhance light distribution and consistency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a low luminous LED is used to illuminate each keyswitch, then power consumption is reduced, but illuminating consistency deteriorates
Solution Approach 1:
The patent applies local quality by creating different light guide hole configurations for different regions of the keyboard. Middle region keyswitches have light guide holes with smaller distances to light emitting units, while side region keyswitches have light guide holes with larger distances. This regional differentiation ensures that each area receives appropriate light intensity, achieving overall illuminating consistency while maintaining low power consumption LEDs.
Solution Approach 2:
The patent changes physical parameters of the light guide structure, specifically the distance between light emitting units and light guide hole walls, to optimize light distribution. By adjusting this parameter across different regions (smaller distance in middle region, larger distance in side regions), the system achieves uniform illumination without increasing LED power consumption.
2Ease of manufacture
If uniform light guide hole design is used across all keyswitches, then manufacturing complexity is reduced, but illuminating consistency deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the keyboard into distinct regions (middle region and side regions) with different light guide hole configurations. This regional segmentation allows each area to be optimized for its specific illumination needs while maintaining a systematic approach that doesn't significantly increase manufacturing complexity compared to a completely custom design.
Solution Approach 2:
The patent changes the distance parameter between light emitting units and light guide hole walls based on regional requirements. This parameter differentiation enables illuminating consistency across diverse keyboard regions while maintaining relatively simple manufacturing processes, as the changes involve standard dimensional adjustments rather than fundamentally different structures.
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 improves illuminating consistency by effectively recycling light within the light guide panel, enhancing brightness of corner symbols, and ensuring uniform illumination across keyswitches.
Implementation Method 1
The light guide panel is disposed on the lighting board and includes a plurality of light guide holes
Implementation Method 2
The light guide panel...enhancing brightness of corner symbols...effectively recycling light within the light guide panel
Implementation Method 3
The lighting board includes a plurality of light emitting units...applies a low luminous light emitting diode (LED) to illuminate each of square keyswitches
Implementation Method 4
The shielding sheet has a plurality of translucent regions and a plurality of inner reflective sections
Data Source
AI summary
A backlight module for a lighting keyboard comprises a lighting board including light emitting units, a light guide panel disposed on the lighting board and including light guide holes, and a shielding sheet disposed on the light guide panel. Each light emitting unit is located in each light guide hole. The backlight module is divided into regions including a middle region and two first side regions located outside the middle region. The light guide holes include at least one middle light guide hole in the middle region and at least one first light guide hole in the first side region. A distance between a light emitting unit located in the middle light guide hole and a wall of the middle light guide hole is lesser than a distance between a light emitting unit located in the first light guide hole and a wall of the first light guide hole.