Backlight Module Optical Film Deflective Microstructures
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Solution Overview
Problem
Existing backlight modules with Mini LEDs suffer from uneven light illumination due to the lack of effective diffusion, leading to poor performance and increased costs associated with high light-emitting element density.
Innovation Solution
Incorporating optical films with deflective microstructures, such as cone and arc arched structures, that are strategically angled relative to the Mini LED array to enhance light diffusion, along with a prism sheet set, to improve light distribution and reduce the number of light-emitting elements required.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If Mini LEDs are used as light-emitting elements to improve light emission, then light emission capability is enhanced, but light illumination becomes uneven and performance deteriorates
Solution Approach 1:
The patent introduces an optical film with deflective microstructures as an intermediary component between the Mini LEDs and the display surface. This optical film mediates the light transmission process by refracting and deflecting light rays, transforming the原本 uneven light distribution into a uniform illumination pattern across the display area.
Solution Approach 2:
The patent changes the physical parameters of the optical system by introducing microstructures with specific geometric parameters (ridge spacing, depth, angles) into the optical film. These parameter changes enable controlled light deflection and refraction, converting point-source light from Mini LEDs into area-source illumination that achieves uniform light distribution.
2Reliability
If high density of light-emitting elements is used to improve light distribution, then light coverage is enhanced, but cost increases
Solution Approach 1:
The optical film acts as a mediator that enables fewer light-emitting elements to achieve the same light distribution effect as would require many more LEDs without the optical film. The deflective microstructures in the optical film spread and redistribute light from each LED over a larger area, reducing the total number of LEDs needed.
Solution Approach 2:
The optical film is segmented into multiple regions with deflective microstructures positioned at specific locations corresponding to each Mini LED. This segmentation allows each LED's light to be independently controlled and distributed to specific zones, achieving uniform overall illumination with fewer total LEDs.
3Ease of manufacture
If conventional optical films without deflective microstructures are used, then manufacturing is simpler, but light diffusion performance is insufficient
Solution Approach 1:
The patent modifies the physical parameters of the optical film by adding deflective microstructures with controlled geometric parameters. While this increases manufacturing complexity, the parameter changes enable superior light diffusion performance that cannot be achieved with conventional flat or simply textured films.
Solution Approach 2:
The optical film is constructed as a composite structure combining a base film material with integrated deflective microstructures. This composite design achieves both light diffusion functionality and structural integrity, balancing manufacturing feasibility with enhanced optical performance.
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 achieves more uniform light illumination across the display area, reducing the need for high light-emitting element density and lowering costs while enhancing overall light performance.
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 is provided. The backlight module includes 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, including: a first surface, having a plurality of cone structures, top points of the cone structures being arranged to form a plurality of first ridges. In addition, an angle is 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.