LED Backlight Module Asymmetry for Color Uniformity
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Solution Overview
Problem
Conventional light emitting diode (LED) backlight units suffer from uneven color distribution due to the uniform arrangement of LEDs in adjacent modules, leading to inconsistent illumination across the display.
Innovation Solution
The LEDs in adjacent columns and rows are arranged in a rotated manner, with varying degrees of rotation to create different included angles between modules, and the modules are also arranged in an alternating pattern to reduce the distance between their centers, thereby improving color uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If light emitting diodes are arranged in the same order and direction in adjacent modules, then the manufacturing process is simplified and consistent, but uneven color distribution occurs in the intersecting or central regions
Solution Approach 1:
The patent applies asymmetry by arranging LEDs in adjacent modules with different orientations (e.g., horizontal vs. vertical arrangements) to break the symmetry that causes uneven color distribution. This creates a checkerboard-like pattern where adjacent modules have different LED orientations, ensuring that color temperatures balance out in intersecting regions.
Solution Approach 2:
The patent implements local quality by assigning different arrangement patterns to different regions of the backlight unit. Specifically, adjacent modules are arranged with different orientations (horizontal/vertical) so that each region contributes differently to the overall color uniformity, with the pattern changing locally to compensate for previous module characteristics.
2Device complexity
If light emitting diodes are arranged uniformly across all modules, then the structure is simple and regular, but the distance between bright and dark spots remains large causing poor color uniformity
Solution Approach 1:
The patent uses asymmetry in module arrangement by alternating between horizontal and vertical LED orientations in adjacent modules. This creates an irregular, checkerboard-like pattern that reduces the effective distance between bright and dark spots by optimizing the spatial distribution of different color temperatures across the backlight unit.
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 approach significantly reduces the distance between bright and dark spots, enhancing color uniformity and addressing the issue of uneven color distribution in LED backlight units.
Implementation Method 1
a plurality of light emitting diode modules 32, in which each light emitting diode module 32 includes three light emitting diodes 34
Data Source
AI summary
A light source for a backlight unit is disclosed. The light source includes a plurality of light emitting diode modules arranged in a manner corresponding to an array, in which each of the light emitting diode modules includes a plurality of light emitting diodes. The array includes a plurality of columns and rows. Preferably, the light emitting diodes of the light emitting diode module of any two adjacent columns are arranged in a different manner, and the light emitting diodes of the light emitting diode module of any two adjacent rows are arranged in a different manner.