Mini LED Backlight Module Density Segmentation for Dimming Cost
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Solution Overview
Problem
Mini LED backlight modules struggle with fine dimming due to the inability to individually control each light bead, leading to increased production costs when attempting to achieve precise brightness adjustments.
Innovation Solution
A backlight module design featuring a first light-emitting region with higher layout density and a second light-emitting region with lower layout density, utilizing switch units to connect light strings in series or parallel, allowing for selective control of light-emitting columns to achieve fine dimming without excessive production cost increases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a large number of Mini LED light beads are arranged densely in a unit area to achieve small-scale dimming, then brightness uniformity and color contrast are improved, but production cost increases significantly when individual control is implemented
Solution Approach 1:
The backlight module is divided into multiple light-emitting regions (first light-emitting region with higher density, second light-emitting region with lower density encircling the first), allowing different control strategies for different areas. This segmentation enables fine dimming in the central region while using simpler control for peripheral regions, reducing overall production cost.
Solution Approach 2:
Different layout densities are applied to different regions: the first light-emitting region (central area) has higher layout density for fine dimming, while the second light-emitting region (peripheral area) has lower layout density. This local differentiation optimizes performance where needed while controlling costs in less critical areas.
2Ease of manufacture
If multiple Mini LED light beads in one region are adjusted simultaneously to reduce production complexity, then production cost is reduced, but fine dimming capability is lost
Solution Approach 1:
The light-emitting areas are segmented into first and second light-emitting regions with different control granularities. The first region supports individual light string control for fine dimming, while the second region uses regional control for simpler manufacturing, achieving a balance between precision and ease of manufacture.
Solution Approach 2:
Fine dimming capability is applied partially only to the first light-emitting region where it is most needed, rather than implementing it across the entire backlight module. This partial application achieves the necessary dimming precision while avoiding excessive production complexity in peripheral areas.
3Manufacturing precision
If individual control of Mini LED light beads is implemented to achieve fine dimming, then dimming precision is improved, but production cost increases excessively
Solution Approach 1:
Individual light string control (fine dimming) is implemented locally in the first light-emitting region where high precision is required, while the second light-emitting region uses simpler regional control. This local quality approach achieves necessary dimming precision without excessive production cost increases across the entire module.
Solution Approach 2:
The control system is segmented into two levels: individual light string control for the first light-emitting region and regional control for the second light-emitting region. This segmentation allows fine dimming precision where needed while reducing production complexity and cost in other areas.
Data Source
AI summary
The disclosure provides a backlight module. The backlight module has a first light-emitting region and a second light-emitting region encircling the first light-emitting region. The backlight module further includes at least one first light-emitting module and at least one second light-emitting module, the at least one second light-emitting module is arranged on a peripheral side of the first light-emitting module, the at least one first light-emitting module is located in the first light-emitting region, and the at least one second light-emitting module is located in the second light-emitting region. The first light-emitting module includes multiple first light strings, the second light-emitting module includes multiple second light strings, and the multiple first light strings has a layout density greater than the multiple second light strings.