Keyboard Backlight Module Layout for Thin-Device Heat Dissipation
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Solution Overview
Problem
Conventional luminous keyboards in thin computing devices face heat dissipation challenges due to the stacking of numerous components in a small space, and there is a need to enhance heat dissipation efficiency to support advanced features like AI-assisted functions.
Innovation Solution
A backlight module for a lighting keyboard comprising a lighting board, light guide panel, and shielding sheet, with specific design features such as light guide holes, blocking portions, and light-reducing patterns to enhance heat dissipation and reduce light leakage, while accommodating AI-assisted functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If numerous components are stacked in a small space to achieve thin device profile, then device thickness is reduced, but heat dissipation efficiency deteriorates
Solution Approach 1:
The patent introduces light guide holes and light transmission channels that extend vertically through multiple stacked layers (shielding sheet, light guide panel, lighting board, key circuit board). This creates three-dimensional light transmission pathways that allow light to pass through the stacked structure without requiring increased horizontal space, thus maintaining thin profile while enabling functional requirements
Solution Approach 2:
The shielding sheet is designed with selective transparency: blocking portions (opaque) in non-key areas and light transmission portions (transparent) in key cap projection areas. This local differentiation allows light to pass through specific regions while blocking other areas, enabling precise light control within the constrained thickness without requiring additional components
2Illumination intensity
If shielding sheet with blocking portions is added to reduce light leakage, then light control improves, but device complexity increases
Solution Approach 1:
The shielding sheet integrates multiple functions into a single component: it provides structural support for the stacked layers, blocks light in non-key areas through blocking portions, and allows light transmission in key areas through light transmission portions. This merging eliminates the need for separate shielding components and simplifies the overall structure despite the added light control capability
Solution Approach 2:
The light guide panel serves multiple purposes: it guides light from the lighting board through light guide holes to the key caps, provides a mounting surface for the shielding sheet, and contributes to the overall structural integrity of the keyboard assembly. This multi-functionality reduces the need for additional dedicated components
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 illuminating consistency, addressing the heat dissipation challenges and ensuring effective operation of AI-assisted features in thin computing devices.
Implementation Method 1
The light guide panel has a first light guide hole and a second light guide hole. The first light emitting unit is in the first light guide hole, and the second light emitting unit is in the second light guide hole.
Implementation Method 2
The shielding sheet has a blocking portion. The blocking portion overlaps in projection with the first light emitting unit and the second light emitting unit.
Data Source
AI summary
A backlight module for a lighting keyboard having a specific function key comprises a lighting board, a light guide panel and a shielding sheet. The shielding sheet, the light guide panel and the lighting board are stacked from top to bottom. The lighting board has first and second light emitting units. The light guide panel has first and second light guide holes. The first light emitting unit is in the first light guide hole. The second light emitting unit is in the second light guide hole. The shielding sheet has a blocking portion. The blocking portion overlaps in projection with the first light emitting unit and the second light emitting unit. The light guide panel has a light guide panel slot. The light guide panel slot overlaps in projection with the blocking portion and a boundary of a keycap projection area of the specific function key.