Keyboard Backlight Module With Heat-Dissipating Key Channels

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Solution Overview

Problem

Conventional luminous keyboards in thin computing devices face significant heat dissipation challenges due to the stacking of numerous components in a small space, necessitating improved heat dissipation efficiency for both the computing devices and embedded keyboard modules.

Innovation Solution

A lighting keyboard design incorporating a reflective layer, light guide panel, and shielding sheet with penetration channels and optical pattern groups to enhance heat dissipation and reduce light leakage, featuring heat-dissipating keys and a key circuit board with light-reducing and diffusion patterns to guide light illumination.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If numerous components are stacked in a small space of the computing device, then the keyboard module can be integrated into thin computing devices, but heat dissipation efficiency deteriorates

Engineering Contradiction:

Improvethickness of computing deviceVSAvoidheat dissipation efficiency

Core Design Contradiction:

Volume of moving objectVSTemperature

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. This segmentation allows simultaneous optimization of light guidance and thermal management in the thin profile

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Penetration channels are introduced as intermediary structures that simultaneously serve as heat dissipation pathways and optical guidance elements. These channels enable thermal energy to escape while maintaining optical functionality in the constrained space

Inventive Principle:

Principle #24Intermediary (Mediator)

2Temperature

If penetration channels are added for heat dissipation, then heat dissipation efficiency improves, but light leakage increases

Engineering Contradiction:

Improveheat dissipation efficiencyVSAvoidlight leakage

Core Design Contradiction:

TemperatureVSIllumination intensity

Solution Approach 1:

The shielding sheet is selectively positioned at specific locations within the penetration channels where light leakage occurs. This localized shielding approach blocks light in critical areas while preserving heat dissipation pathways, achieving both thermal management and optical control

Inventive Principle:

Principle #3Local quality

3Illumination intensity

If light-reducing patterns are added to block light, then light leakage is reduced, but manufacturing complexity increases

Engineering Contradiction:

Improvelight leakage controlVSAvoidmanufacturing complexity

Core Design Contradiction:

Illumination intensityVSEase of manufacture

Solution Approach 1:

The light-reducing patterns are integrated directly into the shielding sheet structure, combining the light-blocking function with the existing thermal management component. This merging approach eliminates the need for separate light-blocking elements, simplifying the manufacturing process while maintaining effective light leakage control

Inventive Principle:

Principle #5Merging (Combining)

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 design improves heat dissipation efficiency and maintains consistent illumination by reducing upward and downward light leakage through the use of light-reducing and diffusion patterns, optimizing the heat dissipation and visual effects of the keyboard.

Implementation Method 1

a reflective layer, a light guide panel and a shielding sheet that are stacked up and down

Methodology Applied

Scientific EffectReflection: Reflection

Implementation Method 2

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

Methodology Applied

Scientific EffectDiffusion: Diffusion

Data Source

PatentUS12518936B2Lighting keyboard and backlight module for the same

Publication Date: 2026.01.06 DARFON ELECTRONICS CORP

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.