Backlight Module Light Guide Plate Opening Structures
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Solution Overview
Problem
Single-sheet light guide plates in keyboard modules suffer from light mixing between neighboring regions of different colors due to the lack of divided regions, making it difficult to achieve color differentiation at a low cost.
Innovation Solution
A backlight module with a single-sheet light guide plate featuring specific opening structures, including first and second opening structures with closed ends that refract and reflect light, preventing light mixing by separating light guide regions and allowing for distinct color display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single-sheet light guide plate is used, then manufacturing cost and assembly complexity are reduced, but light mixing between neighboring regions of different colors occurs
Solution Approach 1:
The patent applies segmentation by introducing opening structures (first opening structures and second opening structures) into the single-sheet light guide plate. These opening structures divide the light guide plate into multiple light guide regions, preventing light mixing between neighboring regions while maintaining the cost advantages of a single-sheet design. The opening structures create physical separations that segment the light propagation paths.
2Object-affected harmful factors
If multi-sheet assembled light guide plates are used, then light mixing between neighboring regions is prevented, but assembly complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the light guide functions of multiple sheets into a single integrated light guide plate with opening structures. Instead of using separate light guide sheets that need to be assembled, the invention combines their light-guiding functionality into one piece with strategically placed openings, eliminating assembly steps while maintaining light separation.
Solution Approach 2:
The opening structures in the single-sheet light guide plate create segmented light guide regions that prevent light mixing, achieving the same effect as multi-sheet assemblies but without the complexity of assembling multiple components.
3Object-affected harmful factors
If divided regions are added to a single-sheet light guide plate, then light mixing is prevented, but manufacturing complexity increases
Solution Approach 1:
The opening structures create a porous-like pattern in the light guide plate, with strategically placed openings that serve as both structural elements and light management features. This approach adds minimal complexity while effectively preventing light mixing through the porous configuration of openings.
Solution Approach 2:
The opening structures provide segmentation with minimal added complexity by using simple geometric patterns of openings rather than complex divided regions, achieving light separation through a relatively straightforward structural modification.
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 divides light guide regions using the opening structures, ensuring that light is not mixed between neighboring regions, allowing for the display of different colors without the high costs associated with multi-sheet assembled light guide plates.
Implementation Method 1
the closed ends are suitable for refracting and reflecting light
Implementation Method 2
the closed ends are suitable for refracting and reflecting light
Data Source
AI summary
A backlight module includes a reflection layer, a light guide plate and a mask layer. The light guide plate is disposed on the reflection layer and includes a light guide body, a first and a second opening structures. The first opening structure including a first closed end, the first closed end has two first branches. The second opening structure includes a second closed end, the first closed end and the second closed end face each other, at least one of the two first branches of the first closed end partially overlaps the second closed end along a first axis, the two first branches are located on two sides of the second closed end along a second axis, and the first axis is perpendicular to the second axis. The light guide plate is disposed between the reflection layer and the mask layer.