Backlight Module Light Refracting Layer Halo Reduction
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Solution Overview
Problem
Mini LED backlight modules suffer from the halo problem, which affects the display quality of display devices due to the partition control of densely distributed Mini LED lamp beads.
Innovation Solution
A backlight module comprising a substrate, a light-emitting layer with multiple light-emitting units, and a light-refracting layer with first and second medium parts having different refractive indices, where the first medium part covers the light-emitting units and the second medium part is arranged between adjacent first medium parts, refracting light to adjust its distribution and reduce halo occurrence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If Mini LED lamp beads are densely distributed to improve screen brightness and picture resolution, then display performance is improved, but the halo problem occurs which affects display quality
Solution Approach 1:
The patent introduces a light guiding layer as an intermediary between the Mini LED lamp beads and the display panel. This light guiding layer contains light guiding structures that guide and diffuse the light from the Mini LED beads, effectively reducing the halo effect while maintaining the brightness benefits of dense Mini LED distribution.
Solution Approach 2:
The patent applies different refractive indices to different regions of the light guiding layer. By creating local variations in optical properties (different refractive indices in different areas), the light guiding structures can effectively control light distribution locally, reducing halo around bright areas while maintaining overall screen brightness.
2Manufacturing precision
If Mini LED lamp beads are densely distributed to achieve better picture resolution, then display quality is improved, but the halo problem occurs which affects overall display quality
Solution Approach 1:
The light guiding layer acts as an intermediary that preserves the high resolution benefits of dense Mini LED distribution while mitigating the halo effect. The light guiding structures within this layer control light propagation to maintain sharp image edges without the unwanted halo artifacts.
Solution Approach 2:
By implementing local quality variations in the light guiding layer with different refractive indices, the patent enables precise control over light distribution at different spatial locations, thereby maintaining high picture resolution while locally suppressing halo effects around bright elements.
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 solution effectively reduces the probability of halo occurrence by adjusting the light distribution, ensuring uniform light emission and improving the display quality and market competitiveness of display devices.
Implementation Method 1
The first medium part has a first refractive index n1 for light emitted by the light-emitting unit, and the second medium part has a second refractive index n2 for the light emitted by the light-emitting unit, where n1>n2
Data Source
AI summary
The present disclosure provides a backlight module and a display device. The backlight module includes a substrate, a light-emitting layer, and a light refracting layer. The light-emitting layer is disposed on the substrate and includes multiple light-emitting units arranged at intervals. The light-emitting unit is configured to emit light. The light-refracting layer includes multiple first medium parts and multiple second medium parts, where the first medium part covers a surface of the light-emitting unit, and the second medium part is arranged between adjacent first medium parts. The first medium part has a first refractive index n1 for light emitted by the light-emitting unit, and the second medium part has a second refractive index n2 for the light emitted by the light-emitting unit, where n1>n2.