Backlight Module Light Control Structure for Mini LED Uniformity
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Solution Overview
Problem
Current backlight modules for display devices face challenges in achieving uniform light flux distribution, leading to inconsistencies in brightness and efficiency, particularly with the use of Mini LEDs, which require advanced light control structures to optimize light transmittance and reflectivity across different regions.
Innovation Solution
A backlight module design featuring a light control structure with alternating light transmitting and reflecting portions, arranged in specific proportions and patterns on a substrate, to ensure consistent light flux distribution, including multiple light control regions with varying transmittance and reflectivity, and the use of light diffusing structures to enhance uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional backlight module structure is used, then the structure is simple, but the light flux distribution is uneven and brightness consistency is poor
Solution Approach 1:
The backlight module divides the light control region into multiple subregions (first light control region, second light control region, third light control region, fourth light control region) with different light transmitting portion proportions. Each subregion is designed with specific characteristics to control light flux distribution in different areas, thereby achieving uniform overall light flux distribution while maintaining manageable structural complexity through modular segmentation.
Solution Approach 2:
Different regions of the light control structure are assigned different proportions of light transmitting portions. The first light control region has a first proportion, the second has a second proportion, the third has a third proportion, and the fourth has a fourth proportion. This local differentiation allows each region to optimize light transmission according to its specific position and function, achieving uniform light flux distribution across the entire backlight module.
2Productivity
If Mini LEDs are used, then the backlight module achieves divisional dimming and fast response, but achieving uniform light flux distribution becomes more difficult
Solution Approach 1:
The light control structure is segmented into multiple regions corresponding to different Mini LED chip arrangements. Each region (first, second, third, fourth light control regions) is designed with specific light transmitting portion proportions matched to the corresponding Mini LED chip characteristics, enabling uniform light flux distribution while preserving the divisional dimming capability of Mini LEDs.
Solution Approach 2:
Each light control region is customized with specific light transmitting portion proportions that match the local Mini LED chip characteristics. This local quality differentiation ensures that light flux distribution is uniform across different regions while maintaining the ability to control individual Mini LED regions for divisional dimming and fast response.
3Illumination intensity
If traditional light control structures are used, then the structure is simpler, but the light uniformity cannot reach high levels (up to 90%)
Solution Approach 1:
The light control structure is divided into four distinct regions with different light transmitting portion proportions. This segmentation enables precise control of light flux distribution in each region, achieving high light uniformity (up to 90%) by optimizing each segment independently while keeping the overall structure manageable through systematic division.
Solution Approach 2:
Each light control region is designed with specific light transmitting portion proportions optimized for its position and function. The first region has a first proportion, the second has a second proportion, the third has a third proportion, and the fourth has a fourth proportion. This local optimization achieves high light uniformity (up to 90%) across the entire backlight module.
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 significantly improves the uniformity of light emission, achieving a high light uniformity of up to 90% and reducing the thickness of the backlight module, while eliminating the need for a lower diffusing plate, thereby enhancing display quality and efficiency.
Implementation Method 1
each light control substructure includes a plurality of light transmitting portions and a plurality of light reflecting portions
Implementation Method 2
each light control substructure includes a plurality of light transmitting portions and a plurality of light reflecting portions
Implementation Method 3
the use of light diffusing structures to enhance uniformity
Data Source
AI summary
The present disclosure relates to a backlight module, a method for designing the same, and a display device. The backlight module includes: a first substrate; a plurality of LED chips on the first substrate; and a light control structure on the first substrate. The backlight module includes a plurality of light control region groups in one-to-one correspondence with the plurality of light-emitting diode chips, each light control region group includes at least a first light control region and a second light control region. The light control structure includes a plurality of light control substructure groups respectively located in the plurality of light control region groups. Each light control substructure group includes at least a first light control substructure in the first light control region and a second light control substructure in the second light control region.