Backlight Module Unit with Optimized Barrier Interval
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Solution Overview
Problem
Conventional backlight modules for LCDs suffer from excessive thickness and non-uniform light mixing due to the need for a large light mixing space, which results in dark bands on both sides of the optical barrier, compromising image quality.
Innovation Solution
A backlight module unit design featuring a first and second light source with a first optical barrier, where the first barrier interval is substantially shorter than half the first light source interval, allowing for uniform light mixing without increasing the module thickness and eliminating dark bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a large light mixing space is provided between the light source and optical barrier, then uniform light mixing is achieved, but the backlight module thickness increases excessively
Solution Approach 1:
The backlight module is divided into multiple backlight module units, each containing a light source and an optical barrier. By segmenting the light mixing function into discrete units with optimized spacing, the patent achieves uniform light mixing while controlling overall thickness. Each unit creates a controlled light mixing zone that contributes to overall uniformity without requiring excessive total thickness.
Solution Approach 2:
The patent optimizes the barrier interval parameter to be substantially shorter than half the light source interval. This specific parameter relationship (barrier interval < 0.5 × light source interval) creates the optimal balance between light mixing effectiveness and module thickness, resolving the contradiction between uniformity and thinness.
2Ease of manufacture
If the barrier interval is reduced to eliminate dark bands, then image quality improves, but light mixing effectiveness may be compromised
Solution Approach 1:
The patent establishes a specific parameter relationship where the barrier interval is substantially shorter than half the light source interval. This optimized parameter setting simultaneously achieves two goals: eliminating dark bands by reducing barrier interval while maintaining light mixing effectiveness through the mathematical relationship with light source spacing.
Solution Approach 2:
The patent replaces the conventional approach of using a large physical light mixing space with an optimized spatial arrangement of light sources and barriers. By substituting the mechanical solution (large space) with a geometric optimization (specific interval ratios), the patent achieves dark band elimination without compromising light mixing.
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 design achieves uniform light mixing and a thinner profile for LCDs by reducing the barrier interval, eliminating dark bands and enhancing image quality at various viewing angles.
Implementation Method 1
a first light source 311, a second light source 312, a first optical barrier 321
Data Source
AI summary
A backlight module unit and a backlight module are provided. The backlight module unit includes a first light source, a second light source, and an optical barrier. A light source interval is defined between the first light source and the second light source, while a barrier interval is defined between the optical barrier and the second light source. Because the barrier interval is substantially shorter than a half of the light source interval, the backlight module unit mixes the light evenly, and prevents the dark bands from forming due to the disposition of the optical barrier. Thereby, the backlight module that comprises the plural aforesaid backlight units will have no dark bands, mix light evenly, and be thin overall.