Backlit Keyboard Lighting Board for Uniform Key Illumination
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Solution Overview
Problem
Backlit keyboards face challenges in achieving uniform illumination, with existing solutions struggling to balance light intensity across different key groups, leading to variations in illuminance that affect user experience in low-light environments.
Innovation Solution
The implementation of a backlit module with a lighting board featuring a substrate and an electronic device layer comprising key circuit groups with light sources arranged in parallel and resistors in series, along with optional excess wiring, ensures consistent line equivalent resistances across key groups, enhancing illumination uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If light sources are arranged in series to simplify circuit design, then circuit complexity is reduced, but illumination uniformity deteriorates due to varying line equivalent resistances across key groups
Solution Approach 1:
The patent applies local quality by configuring light sources in parallel within each key group rather than using a uniform series arrangement. This allows each key group to have its own independent circuit characteristics, enabling localized adjustment of electrical parameters to compensate for variations in line equivalent resistance. The parallel arrangement ensures that each light source receives appropriate current regardless of the key group's position or size, thereby achieving uniform illumination across the entire keyboard.
2Area of stationary object
If different numbers of light sources are used in different key groups to match key group sizes, then illumination coverage is improved, but circuit complexity increases due to varying configurations
Solution Approach 1:
The patent implements universality by using a standardized parallel circuit configuration that can be applied uniformly across all key groups regardless of their size or shape. Each key group uses the same parallel connection topology, making the circuit design modular and scalable. This universal approach simplifies manufacturing and maintenance while allowing flexible adjustment of the number of light sources per group to match different key group areas, thereby achieving both comprehensive coverage and circuit simplicity.
3Illumination intensity
If more light sources are added to larger key groups to maintain brightness, then illumination uniformity is improved, but energy consumption increases
Solution Approach 1:
The patent applies parameter changes by utilizing the parallel circuit configuration to independently control electrical parameters (voltage and current) for each key group. This allows optimization of power distribution where larger key groups receive appropriate current allocation without unnecessarily increasing the number of light sources. The parallel arrangement enables precise parameter adjustment to achieve uniform brightness while minimizing energy consumption by matching power delivery to the actual illumination requirements of each key group.
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 effectively adjusts and maintains uniform light emission across the keyboard, improving user experience by ensuring consistent illuminance across all keys, even with varying key group sizes and shapes.
Implementation Method 1
The electronic device layer comprises a plurality of key circuit groups. Each of the key circuit groups corresponds to a key group of the backlit keyboard, and comprises one or more light sources and a resistor.
Data Source
AI summary
A backlit module for a backlit keyboard is provided. The backlit module includes a lighting board. The lighting board includes a substrate and an electronic device layer. The electronic device layer is disposed on the substrate. The electronic device layer includes a plurality of key circuit groups. Each of the key circuit groups corresponds to a key group of the backlit keyboard, and includes one or more light sources and a resistor. When the key circuit group includes a plurality of light sources, the light sources are arranged in parallel. The one or more light sources correspond to one or more key of the key group. The resistor is arranged in series with the one or more light sources.