Backlight Panel Layout for Uniform Micro LED Brightness
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Solution Overview
Problem
Micro LED panels exhibit poor brightness uniformity due to micro LED devices being distributed in the same direction, leading to issues such as uneven picture display and light shadows.
Innovation Solution
A backlight panel design where light-emitting diodes are alternately arranged along intersecting directions, with their emission areas also arranged alternately and partially overlapping, to enhance light mixing and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If micro LED devices are distributed in the same direction, then the device structure is simple and easy to manufacture, but the brightness uniformity deteriorates with uneven picture display and light shadows
Solution Approach 1:
The patent transitions from single-direction linear arrangement to two-dimensional intersecting directional arrangement. Light-emitting diodes are arranged in at least two different directions that intersect, converting a one-dimensional distribution pattern into a two-dimensional pattern. This dimensional change enables more uniform light coverage across the display surface while maintaining manufacturing simplicity through regular geometric patterns.
Solution Approach 2:
The patent introduces asymmetric arrangement patterns where light-emitting diodes are positioned at different angular orientations relative to the display surface normal. By using intersecting directions with specific angle ranges (30°-60° from vertical), the arrangement creates asymmetric light emission paths that complement each other to achieve uniform brightness, breaking the symmetry that causes directional light concentration.
2Illumination intensity
If light-emitting diodes are arranged in intersecting directions with overlapping emission areas, then brightness uniformity is improved, but the device complexity increases
Solution Approach 1:
The patent segments the light-emitting diode array into multiple directional groups, where each group emits light in a specific direction within defined angle ranges. By dividing the overall arrangement into segments with distinct angular orientations (first direction group with 30°-60° angles, second direction group with complementary angles), the complex intersecting pattern becomes systematically manageable through modular segmentation.
Solution Approach 2:
The patent controls device complexity by precisely defining angular parameter ranges rather than requiring exact angle specifications. Light-emitting diodes are arranged within angle ranges (30°-60° from vertical direction for first group, corresponding complementary angles for second group), allowing manufacturing flexibility while maintaining the uniformity benefits of intersecting arrangements. This parameter-based approach simplifies the implementation complexity.
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
Improves brightness uniformity and light emission uniformity by complementing the light-emitting areas, achieving a more uniform light distribution across the panel surface.
Implementation Method 1
a plurality of light-emitting diodes disposed on the substrate. The plurality of light-emitting diodes include a first light-emitting diode for shining a first light-emitting area and a second light-emitting diode for shining a second light-emitting area
Data Source
AI summary
The embodiments of the present disclosure provide a backlight module. A first light-emitting diode and a second light-emitting diode are alternately arranged along a first direction and/or a second direction. The first light-emitting diode is for shining a first light-emitting area. The second light-emitting diode is for shining a second light-emitting area. An extension direction of the first light-emitting area intersects an extension direction of the second light-emitting area. A light-emitting area complementation effect is achieved, and a light mixing effect and a uniformity of light emission are further improved.