Mini-LED Backlight Module Light Guide Plate Segmentation
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Solution Overview
Problem
Mini-LED backlight modules face challenges in achieving uniform light emission and thickness reduction due to insufficient light mixing distance, leading to increased costs and power consumption from the need for more light emission units.
Innovation Solution
A backlight module design featuring a light guide plate with diffusing portions and a diffusing layer that directly supports light emission units, improving light diffusing uniformity and reducing the number of units required, thereby increasing the interval between units and decreasing module thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the thickness of the Mini-LED backlight module is reduced to meet light weight and compactness requirements, then the module becomes thinner and more compact, but the light mixing distance becomes insufficient resulting in uneven light display
Solution Approach 1:
The backlight module is segmented into multiple light emitting regions with individual light guiding structures. Each light guiding structure independently guides and diffuses light from its corresponding Mini-LED array, allowing localized optimization of light mixing distance while maintaining overall thinness. The segmentation enables different regions to have tailored optical paths without increasing overall module thickness.
Solution Approach 2:
The patent introduces a vertical dimension to light mixing by creating light guiding structures that extend from the light emitting face toward the Mini-LED arrays. This vertical light guiding path provides sufficient light mixing distance within the thin profile by utilizing the thickness direction of the module rather than requiring a larger lateral distance.
2Illumination intensity
If the amount of Mini-LED lamp elements is increased to fulfill light emission requirements, then the light emission capability is improved, but the yield rate of mounting decreases and cost and power consumption increase
Solution Approach 1:
Multiple light guiding structures are merged into a single integrated light guide plate component that can be manufactured as one piece. This merging reduces the number of separate parts and assembly steps, thereby improving mounting yield rate while maintaining the light emission capability through the combined optical effect of all light guiding structures.
Solution Approach 2:
The light guide plate serves multiple functions simultaneously: it acts as a structural support component, a light guiding element, a light diffusing medium, and a spacing maintainer between the Mini-LED arrays and the light emitting face. This multi-functionality reduces the need for additional components and simplifies the overall structure.
3Illumination intensity
If the amount of Mini-LED lamp elements is increased to improve light emission, then the brightness requirement is met, but the cost and power consumption increase
Solution Approach 1:
The patent optimizes parameters such as the refractive index, thickness, and geometric shape of the light guiding structures to maximize light extraction and diffusion efficiency. By carefully controlling these parameters, the system achieves uniform brightness distribution with fewer Mini-LED elements, reducing both cost and power consumption while maintaining the required illumination intensity.
Solution Approach 2:
Different regions of the light guide plate are designed with locally optimized properties, such as varying thickness, different refraction patterns, or selective light guiding structures in specific areas. This local quality optimization ensures that each region contributes efficiently to the overall brightness, allowing the use of fewer total Mini-LED elements while achieving uniform illumination across the entire display area.
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
Enhances light emitting uniformity and reduces the number of light emission units, lowering costs and power consumption while maintaining or improving brightness and stability.
Implementation Method 1
the light guide plate comprises a plurality of first light diffusing portions, and each of the first light diffusing portions accommodates at least one of the light emission units to diffuse light emitted from the light emission units
Data Source
AI summary
The present application discloses a backlight module and a display device. The backlight module includes a base, a light emission assembly, and a light guide plate. The light emission assembly includes light emission units disposed on a first side of a base. The light guide plate is disposed on the first side of the base. The light guide plate includes first light diffusing portions, and each of the first light diffusing portions accommodates at least one of the light emission units to diffuse light emitted from the light emission unit.