Keyboard Backlight Module Layout for LED Alignment and Light Output
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Solution Overview
Problem
Existing backlight modules in light-emitting keyboards face challenges in enhancing lighting efficiency and are prone to damage from alignment errors during assembly.
Innovation Solution
The design incorporates a composite light-emitting layer with light sources spaced from the spacing layer and adhesive layer to prevent alignment issues, and includes a conductive layer with a patterned structure insulated by an insulating layer, allowing for efficient and damage-resistant backlighting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If light sources are placed close to the spacing layer and adhesive layer for compact design, then device complexity is reduced, but alignment errors during assembly increase and reliability deteriorates
Solution Approach 1:
The spacing layer includes pre-formed holes at precise positions before final assembly. These holes serve as positioning features that guide the light sources to their correct locations, preventing alignment errors during assembly while maintaining a compact structure.
Solution Approach 2:
The spacing layer acts as an intermediary component between the light sources and the bracket. It provides a stable mounting surface with pre-defined hole positions, mediating the alignment between different components and ensuring precise light source placement without requiring complex assembly procedures.
2Reliability
If light sources are spaced from the spacing layer and adhesive layer to prevent alignment issues, then reliability improves, but lighting efficiency deteriorates due to increased distance
Solution Approach 1:
The spacing layer provides localized spacing through its hole structure. The light sources are spaced from the main body of the spacing layer and adhesive layer for alignment stability, but remain optimally positioned relative to the bracket opening for efficient light emission. This creates different spacing relationships in different locations to satisfy both reliability and efficiency requirements.
Solution Approach 2:
The holes in the spacing layer are pre-positioned to optimize the distance between light sources and the bracket opening. This preliminary design ensures that even with the added spacing for alignment stability, the light sources remain at an optimal distance for efficient lighting performance.
3Device complexity
If adhesive layer is placed close to light sources for compact structure, then device complexity is reduced, but the adhesive may interfere with optical performance and reliability decreases
Solution Approach 1:
The spacing layer serves as an intermediary that physically separates the adhesive layer from the light sources. The adhesive is applied to the spacing layer rather than directly to the light sources, preventing interference with optical performance while maintaining a compact multi-layer structure.
Solution Approach 2:
The spacing layer is designed with a specific structure that allows adhesive application at locations away from the light source holes. This preliminary design of the spacing layer structure enables compact assembly while preserving optical performance by preventing adhesive contamination of the light emission areas.
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
This configuration enhances lighting efficiency and reduces the risk of damage during assembly, providing uniform and directional backlighting with improved optical performance.
Implementation Method 1
The composite light-emitting layer is disposed under the bracket, and includes a conductive layer, and light sources. The light sources are electrically connected to a portion of the conductive layer.
Data Source
AI summary
A light-emitting keyboard includes a bracket, keycaps, a circuit layer, a composite light-emitting layer, a spacing layer and an adhesive layer. The keycaps are disposed on the bracket and connected to the bracket. The circuit layer is disposed between the keycaps and the bracket. The composite light-emitting layer is disposed under the bracket, and includes a conductive layer, and light sources. The light sources are electrically connected to a portion of the conductive layer. The spacing layer is disposed between the composite light-emitting layer and the bracket, and includes holes corresponding to the light sources. One of the light sources is located in one of the holes of the spacing layer, and the light source is spaced from a wall of the corresponding hole. The adhesive layer is disposed between the composite light-emitting layer and the bracket, and the adhesive layer is spaced from one of the light sources.