Backlight Module Flexible Substrate Paint Area Color Distortion
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Solution Overview
Problem
The color of the light emitted from a light-emitting keyboard is affected by the flexible substrate, leading to a compromised vision effect, especially in larger keyboards with multiple light emitting units, as the substrate only reflects light of its own color, distorting the intended color of the light guiding plate.
Innovation Solution
A paint area, formed with white paint or ink, is applied on the flexible substrate near the light emitting unit to reflect the light emitted from the unit to the light guiding plate, ensuring the light's original color is maintained and uniformly distributed across the keyboard.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the flexible substrate is used to support the light emitting unit, then the structural support function is achieved, but the light color is distorted due to the substrate's own color reflecting light
Solution Approach 1:
A reflective layer is introduced as an intermediary between the flexible substrate and the light guiding plate. This reflective layer has high reflectivity and accurately reflects the light color from the light guiding plate back to the keyboard surface, preventing the flexible substrate's color from distorting the light output while maintaining structural support.
Solution Approach 2:
The reflective layer is designed with optical properties that enable it to reflect light in its original color without adding the substrate's color tint. By controlling the reflective layer's material composition and optical characteristics, the light color accuracy is maintained while the substrate's color interference is eliminated.
2Area of stationary object
If multiple light emitting units are used in larger keyboards, then the illumination coverage is improved, but the negative vision effect increases due to cumulative color distortion from the substrate
Solution Approach 1:
The reflective layer serves as a mediator for each light emitting unit, ensuring that light from multiple sources maintains color accuracy. By placing this reflective layer between the substrate and light guiding plate, the cumulative color distortion effect is prevented even as the number of light emitting units increases across larger keyboard areas.
3Device complexity
If the flexible substrate directly reflects light to the light guiding plate, then the structure is simplified, but the vision effect is degraded due to color interference
Solution Approach 1:
The reflective layer is positioned between the flexible substrate and the light guiding plate to act as an optical mediator. This adds one layer to the structure but eliminates the need for complex color correction mechanisms, as the reflective layer's high reflectivity and color accuracy directly improve the vision effect while maintaining overall structural simplicity.
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 use of a paint area on the flexible substrate allows for complete reflection of the light's original color to the light guiding plate, enhancing the vision effect by maintaining the intended color and reducing the negative impact of the substrate on the light-emitting keyboard's appearance.
Implementation Method 1
A paint area is formed on the first surface near the light emitting unit for reflecting the light emitted from the light emitting unit to the light guiding plate
Data Source
AI summary
The invention provides backlight module comprising a light guiding plate, a flexible substrate, and a light emitting unit. The flexible substrate has a first surface, and the light emitting unit is configured on the first surface. A paint area used for reflecting the light, emitted by the light emitting unit, to the light guiding plate is formed on the first surface near the light emitting unit. Accordingly, the light emitted into the light guiding plate could be prevented from being reflected by the flexible substrate directly and presenting the same color with the flexible substrate.