Light-Transmissive Keyboard Circuit Structure for Uniform Backlighting
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Solution Overview
Problem
Conventional light-emitting keyboards suffer from uneven light distribution, with keys closer to light-emitting elements receiving brighter illumination and those farther away receiving darker illumination, due to the concentrated placement of light-emitting elements adjacent to the light guide plate.
Innovation Solution
A circuit structure comprising a light-transmissive insulation layer, a patterned conductive layer, an electronic component, a protection layer, and a pad layer is used, where the electronic component is a light-emitting component, and the patterned conductive layer is disposed on the light-transmissive insulation layer, with the protection layer covering the component and the pad layer surrounding it, to improve light distribution across the keyboard.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If light-emitting elements are concentratedly disposed adjacent to the light guide plate, then the light-emitting element can be compactly arranged, but the light distribution becomes uneven with keys closer to the light-emitting element getting brighter and keys farther away getting darker
Solution Approach 1:
The patent divides the light guide plate into multiple light transmission regions with different light transmission rates. Specifically, the light guide plate includes a first light transmission region with a first light transmission rate and a second light transmission region with a second light transmission rate different from the first. This segmentation allows different portions of the keyboard to receive appropriately adjusted light quantities, achieving uniform light distribution across all keys while maintaining compact light-emitting element arrangement.
2Device complexity
If light-emitting elements are placed to provide side-light to the light guide plate, then the structure is simple, but the light intensity varies significantly across different key positions
Solution Approach 1:
The patent applies local quality by creating regions with different light transmission characteristics within the light guide plate. The first light transmission region and second light transmission region have different light transmission rates, allowing each region to be optimized for its specific location. This ensures that keys in different positions receive appropriate light intensity, transforming the uniform side-lighting approach into a differentiated lighting system that achieves uniformity across the keyboard surface.
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 ensures more uniform and brighter light emission across all keys, addressing the issue of uneven illumination by optimizing the placement and shielding of light-emitting components within the backlight module and light-emitting key device.
Implementation Method 1
a light-transmissive insulation layer, a patterned conductive layer, an electronic component, a protection layer and a pad layer. The patterned conductive layer is disposed on the light-transmissive insulation layer
Data Source
AI summary
A circuit structure includes a light-transmissive insulation layer, a patterned conductive layer and an electronic component. The patterned conductive layer is disposed on the light-transmissive insulation layer. The electronic component is disposed on the patterned conductive layer and electrically connected to the patterned conductive layer.