Backlight Module Light Source Assembly with U-Shaped Reflector
Solution Overview
Problem
Direct type backlight modules face inefficiencies in light distribution and heat dissipation due to the placement of light sources under the entire area of the liquid crystal display panel, leading to suboptimal light transmission and potential overheating issues.
Innovation Solution
A light source assembly with a U-shaped main body, LED base board, high-reflectance films, and a lens system that adjusts light emission angles, combined with a light-guiding assembly featuring a reflector, light-dispersive plate, and optical correcting elements, ensures efficient light transmission and heat dissipation by using screws for secure mounting and a thermal gasket for improved light containment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light sources are disposed under the entire area of the liquid crystal display panel, then light transmission is improved, but heat dissipation efficiency deteriorates
Solution Approach 1:
The patent divides the light source assembly into multiple independent LED modules distributed across the backlight module. Each LED module contains individual LED lights that can be independently arranged and managed. This segmentation allows light to be emitted from multiple distributed points, improving overall light transmission coverage, while also enabling localized heat management where each LED's heat can be dissipated independently through its own heat dissipation structure, thus resolving the contradiction between light transmission and heat dissipation efficiency.
2Area of stationary object
If light sources are disposed under the entire area of the liquid crystal display panel, then light coverage is improved, but light distribution efficiency deteriorates
Solution Approach 1:
The patent employs optical films with different local properties positioned at different locations within the backlight module. Specifically, a first optical film with a first optical property and a second optical film with a second optical property are used to control light distribution in different regions. This local quality approach ensures that light coverage is maximized across the entire panel area while maintaining efficient light distribution by optimizing the optical characteristics in specific zones according to their functional requirements.
3Ease of manufacture
If conventional light source assembly structure is used, then manufacturing is simpler, but light containment and heat dissipation performance deteriorate
Solution Approach 1:
The patent implements a nested structure where the LED module is positioned within a recessed cavity formed in the light source assembly backplate. The LED module sits in this recessed portion, creating a nested arrangement that efficiently contains light within the backlight module structure. This nested design also incorporates heat dissipation fins that extend from the recessed cavity, allowing heat to be conducted away from the LED while maintaining a compact, manufacturable structure that integrates multiple functions (light containment, heat dissipation, and structural support) into a single assembly.
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 distribution and heat management, optimizing light transmission to the liquid crystal display panel while preventing light leakage and maintaining efficient heat dissipation, thereby improving the overall performance and efficiency of the backlight module.
Implementation Method 1
high-reflectance films
Implementation Method 2
lens system that adjusts light emission angles
Implementation Method 3
light-dispersive plate
Implementation Method 4
thermal gasket for improved light containment
Data Source
AI summary
A backlight module includes a light-guiding assembly and a light source assembly. The light-guiding assembly includes a back cover, a reflector, a light-guiding plate (LGP), a number of optical correcting elements, and a frame. The light source assembly includes a main body and a light source. The back cover defines a light input area. The main body includes two reflection sides. The two reflection sides curve over the light source. The main body defines a main body opening between the two reflection sides. The light source assembly further includes a lens received in the main body opening. The light emitted from the light source and reflected by the two reflection sides are transmitted to outside of the main body through the lens.