Luminous Keyboard Backlight Shielding for Edge Light Leakage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional backlight modules in luminous keyboards suffer from light leakage at the side edges due to the use of light-transmissive adhesion layers, which allow light emitted by the light source to pass through and escape.
Innovation Solution
The implementation of a shielding structure comprising an inner adhesion layer, an air gap, and an outer adhesion layer aligned to form a series that blocks light from leaking out of the outer edge gap, combined with a light masking sheet that extends to form additional shielding components to prevent light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If light-transmissive adhesion layers are used to assemble the backlight module, then the ease of manufacture is improved, but light leakage occurs at the side edges
Solution Approach 1:
The adhesion structure is segmented into multiple layers (first adhesion layer, second adhesion layer) with an air gap between them, creating a multi-stage light blocking system that prevents light leakage while maintaining ease of manufacture
Solution Approach 2:
The air gap acts as an intermediary element between the two adhesion layers, serving as an additional light-blocking barrier while allowing the adhesion layers to maintain their light-transmissive properties for ease of assembly
2Object-generated harmful factors
If a shielding structure is added to block light leakage, then light leakage is reduced, but the device complexity increases
Solution Approach 1:
The shielding function is merged with the existing adhesion layers by configuring them in a multi-layer structure with an air gap, eliminating the need for separate shielding components and reducing overall device complexity
Solution Approach 2:
The adhesion layers serve dual functions: both bonding the backlight module components together and acting as light-blocking barriers when configured in the multi-layer structure with air gap
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 reduces light leakage at the side edges of the backlight module, enhancing the masking effect and mechanical strength while maintaining uniform light distribution.
Implementation Method 1
The shielding structure is disposed outside the light source to at least partially block light provided by the light source from emitting towards the outer edge gap
Implementation Method 2
at least one air gap is located between the first adhesion layer and the outer adhesion layer. The inner adhesion layer, the at least one air gap and the outer adhesion layer are aligned in series toward the outer edge gap to jointly form the shielding structure to reduce partial light of the light source from leaking out of the outer edge gap
Data Source
AI summary
A backlight module applicable to a key module is provided, the key module includes a plurality of key units and a baseplate, and the plurality of key units are disposed on the baseplate. The backlight module includes a lower substrate, a plurality of periphery light sources disposed along the peripheral of the baseplate, and a shielding structure. The lower substrate is disposed below the baseplate, and there is an outer edge gap between an outer edge of the baseplate and the lower substrate. The periphery light sources are disposed between the baseplate and the lower substrate. The shielding structure is disposed outside those periphery light sources distributed, to prevent light provided by the plurality of light sources from being emitted out of the outer edge gap.