Backlight Module With Deflective Microstructures For Uniform Illumination
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Solution Overview
Problem
Conventional backlight modules with Mini LEDs and optical films without deflective microstructures suffer from uneven light illumination, leading to poor light distribution and contrast in LCD displays.
Innovation Solution
Incorporating optical films with deflective microstructures, such as triangular column structures and cylindrical structures, that are parallel or orthogonal to each other, to improve light diffusion and distribution, along with a substrate and Mini LEDs arranged in specific patterns to optimize the angle and distance between light-emitting elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If optical films without deflective microstructures are used, then the device complexity is reduced, but the light illumination uniformity deteriorates
Solution Approach 1:
The optical film incorporates deflective microstructures at specific locations (corresponding to light-emitting elements) rather than uniformly across the entire film. This local modification approach improves light diffusion where needed while keeping the overall film structure relatively simple, resolving the contradiction between device complexity and illumination uniformity.
Solution Approach 2:
The patent introduces microstructures with specific three-dimensional geometries (triangular columns, cylindrical structures) that deflect light in multiple directions. This dimensional transformation from flat 2D film to structured 3D surface enables improved light distribution uniformity without significantly increasing overall device complexity.
2Productivity
If Mini LEDs are used as light-emitting elements, then the productivity is improved, but the light illumination uniformity deteriorates
Solution Approach 1:
The optical film with deflective microstructures serves as an intermediary between the Mini LEDs and the display screen. It intercepts the directional light from the high-efficiency Mini LEDs and redistributes it through microstructure-deflected paths, transforming concentrated light into uniform illumination without reducing the productivity benefits of Mini LED technology.
3Illumination intensity
If more light-emitting elements are installed, then the light illumination intensity is improved, but the device complexity increases
Solution Approach 1:
The patent optimizes the parameters of existing light-emitting elements (Mini LEDs) by adjusting their arrangement patterns and introducing optical films with specific microstructure geometries. This approach achieves improved light illumination intensity through parameter optimization rather than simply increasing the number of elements, thereby avoiding proportional increases in device 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
The solution enhances light diffusion and distribution, resulting in more even illumination across the LCD screen, improving contrast and overall light performance while reducing the density of light-emitting elements, thus lowering costs.
Implementation Method 1
physical phenomena such as light refraction, reflection or scattering can then be applied to make the light illumination more evenly distributed
Implementation Method 2
physical phenomena such as light refraction, reflection or scattering can then be applied to make the light illumination more evenly distributed
Implementation Method 3
physical phenomena such as light refraction, reflection or scattering can then be applied to make the light illumination more evenly distributed
Data Source
AI summary
A backlight module includes that of: a substrate; a plurality of light-emitting elements, disposed on the substrate along a first direction and a second direction; and at least one optical film, comprising: a first surface, having a plurality of microstructures, the microstructures being parallel to each other, every microstructure having a first ridge, and an angle being between the first ridge and the first direction; and a second surface, corresponding to the first surface and toward the substrate, the plurality of light-emitting elements being between the substrate and the second surface; wherein a distance X is between the light-emitting element and the other light-emitting element that is adjacent to the light-emitting element along the first direction, and a distance Y is between the light-emitting element and the other light-emitting element that is adjacent to the light-emitting element along the second direction, hence a range of the angle is:(tan-1YX)-10°≤θ≤(tan-1YX)+10°.