Keyboard Backlight Module Layout for Heat Dissipation and Light Leakage
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Solution Overview
Problem
Conventional lighting keyboards face heat dissipation challenges due to densely packed components in thin computing devices, which affects their efficiency and requires improved heat management in keyboard modules.
Innovation Solution
A lighting keyboard with a backlight module comprising a reflective layer, light guide panel, and shielding sheet, featuring penetration channels with light-reducing and diffusion patterns to enhance heat dissipation and light illumination, while minimizing light leakage through the use of heat-dissipating keys and a key circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If components are densely stacked in a thin computing device to achieve compact size, then device thickness is reduced, but heat dissipation efficiency deteriorates
Solution Approach 1:
The backlight module is segmented into multiple functional layers (reflective layer, light guide panel, shielding sheet) with dedicated penetration channels for heat dissipation. Each layer serves specific functions while collectively addressing both illumination and thermal management requirements in the compact keyboard design.
Solution Approach 2:
Heat dissipation penetration channels are strategically positioned at specific locations corresponding to heat-generating components. The optical patterns (light-reducing and diffusion patterns) are locally applied around penetration channels to control light leakage while maintaining effective heat dissipation pathways in critical thermal zones.
2Temperature
If penetration channels are added for heat dissipation, then heat dissipation efficiency is improved, but light leakage increases
Solution Approach 1:
Optical patterns act as intermediaries between the penetration channels and the surrounding keyboard structure. The light-reducing patterns block direct light paths while the diffusion patterns redirect light, effectively mediating the conflict between heat dissipation requirements and light containment in the backlight module.
Solution Approach 2:
Optical properties are locally modified around penetration channels through light-reducing and diffusion patterns. These patterns are selectively applied only in regions where penetration channels exist, providing localized light control without affecting the overall backlight illumination uniformity or adding excessive complexity to the entire keyboard structure.
3Illumination intensity
If optical patterns are added around penetration channels, then light leakage is reduced, but manufacturing complexity increases
Solution Approach 1:
The light-reducing patterns and diffusion patterns are merged into a unified optical pattern system that is integrated with the existing backlight module structure. This combined approach achieves effective light leakage control while avoiding the need for separate additional components or complex multi-step manufacturing processes.
Solution Approach 2:
The optical patterns serve multiple functions simultaneously: they control light leakage around penetration channels, maintain backlight illumination uniformity, and do not interfere with heat dissipation pathways. This multi-functionality reduces the need for additional specialized components and simplifies the overall manufacturing process.
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 effectively improves heat dissipation efficiency and maintains consistent illumination by guiding light to heat-dissipating keys, reducing upward and downward light leakage, and optimizing heat transfer through strategically designed penetration channels and optical patterns.
Implementation Method 1
The at least two penetration channels symmetrically correspond to the heat-dissipating keys respectively and penetrate the reflective layer, the light guide panel and the shielding sheet
Implementation Method 2
The at least two penetration channels are respectively provided with one light-reducing pattern at their periphery for blocking light
Implementation Method 3
At least two diffusion patterns are arranged adjacent to the light-reducing patterns for guiding light to illuminate the at least two heat-dissipating keys
Implementation Method 4
The reflective layer, the light guide panel and the shielding sheet are stacked up and down
Data Source
AI summary
A backlight module for a lighting keyboard including at least two heat-dissipating keys comprises a reflective layer, a light guide panel and a shielding sheet and has at least two penetration channels. The reflective layer, the light guide panel and the shielding sheet are stacked up and down. The penetration channels symmetrically correspond to the heat-dissipating keys respectively and penetrate the reflective layer, the light guide panel and the shielding sheet. The penetration channels are respectively provided with one light-reducing pattern at their periphery for blocking light. At least two diffusion patterns are arranged adjacent to the light-reducing patterns for guiding light to illuminate the heat-dissipating keys. The light-reducing patterns and the diffusion patterns form at least two heat-reducing optical pattern groups respectively. The heat-reducing optical pattern groups respectively corresponding to the heat-dissipating keys have identical patterns.