Light Adjusting Structure With Mesh Pattern for Keyboard Light Leakage
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Solution Overview
Problem
Illuminated keyboards suffer from significant light leakage, causing user discomfort and interference, especially in dark environments, due to strong backlight emission that is often more than ten times the intensity of the display region, and can project onto nearby devices.
Innovation Solution
A light adjusting structure with a visible light absorbing pattern, featuring a checkerboard or mesh pattern with a thickness-to-width ratio greater than or equal to 0.5, is placed between the light source and the light exiting surface, reducing light exit angles and dimensions to minimize light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light source is used to illuminate the keyboard, then the display region is sufficiently bright, but light leakage occurs that is more than ten times the intensity of the display region
Solution Approach 1:
The light adjusting structure is divided into multiple light-transmitting regions and light-absorbing regions arranged in a checkerboard or mesh pattern. This segmentation allows the structure to selectively transmit and absorb light in different areas, reducing overall light leakage while maintaining display brightness.
Solution Approach 2:
Different regions of the light adjusting structure have different optical properties - some regions transmit light while others absorb it. The light-absorbing regions are strategically positioned to block leakage paths, while light-transmitting regions maintain illumination, creating local quality variations to solve the contradiction.
2Object-generated harmful factors
If the light absorbing pattern has a larger thickness-to-width ratio, then light leakage is reduced, but the structure becomes more complex and may affect light transmission to the display region
Solution Approach 1:
The patent optimizes the thickness-to-width ratio parameter of the light-absorbing patterns to be greater than 0.5. This specific parameter range achieves effective light leakage reduction while avoiding excessive structural complexity and maintaining adequate light transmission to the display region.
Solution Approach 2:
The light adjusting structure introduces a thickness dimension to the otherwise two-dimensional pattern. By controlling the thickness-to-width ratio in the vertical dimension, the structure achieves three-dimensional light control functionality, reducing leakage without requiring complex lateral structures.
3Object-generated harmful factors
If the light adjusting structure uses a checkerboard or mesh pattern, then light leakage is effectively reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The checkerboard or mesh pattern divides the light adjusting structure into repeated modular units. This segmentation allows for standardized manufacturing processes and simplifies quality control, as the same pattern can be replicated across the entire structure using consistent manufacturing parameters.
Solution Approach 2:
By defining a specific thickness-to-width ratio greater than 0.5, the patent establishes a clear manufacturing target that balances effectiveness with manufacturability. This parameter specification provides sufficient design margin to accommodate normal manufacturing variations while achieving the desired light leakage reduction.
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 and interference by limiting the light exit angle and intensity, preventing strong light from being visible to the user and reducing projections onto nearby devices, thereby enhancing user comfort and reducing visual disturbances.
Implementation Method 1
a light adjusting structure disposed between a light source in a device and a light exiting surface of the device. The light adjusting structure includes at least one visible light absorbing pattern defining a plurality of light-transmitting regions
Data Source
AI summary
A light adjusting structure is disposed between a light source in a device and a light exiting surface of the device. The light adjusting structure includes at least one visible light absorbing pattern defining a plurality of light-transmitting regions, and a ratio of a thickness of the at least one visible light absorbing pattern to a width of one of the light-transmitting regions is greater than or equal to 0.5, and a vertical projection of the at least one visible light absorbing pattern presents a checkerboard pattern or a mesh pattern.