Segmented Reflective Assembly for Thin LCD Backlight Modules
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional direct type backlight modules have a significant thickness due to the required distance between the light source and the diffuser plate, which hinders the trend of thinning in liquid crystal display (LCD) technology, and lacks effective light mixing.
Innovation Solution
A light source module with a reflective assembly featuring a plurality of first and second partition plates that form reflective holes, allowing light from point light sources to be transmitted through various paths, reducing the light mixing distance and thickness, while maintaining a uniform light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the diffuser plate is disposed above the light source with a certain distance for light mixing, then the light output uniformity is improved, but the thickness of the backlight module increases
Solution Approach 1:
The reflective plate is divided into multiple reflective regions (first, second, third reflective regions) with different reflective rates. This segmentation allows different portions of light to be reflected with different intensities, creating multiple light paths that enhance light mixing efficiency within a shorter distance, thereby improving uniformity without increasing thickness.
Solution Approach 2:
Different regions of the reflective plate are assigned different reflective properties (different reflective rates). The first reflective region has a higher reflective rate than the second and third regions, creating localized variations in light reflection that optimize light distribution and mixing in the limited space between the light source and diffuser plate.
2Length of stationary object
If the distance between the light source and the diffuser plate is reduced to thin the module, then the thickness is reduced, but the light mixing effect deteriorates
Solution Approach 1:
By segmenting the reflective plate into multiple regions with different reflective rates, the patent creates a more complex light path structure within the reduced thickness. This segmentation ensures that light undergoes multiple reflections with varying intensities, compensating for the shorter distance and maintaining effective light mixing.
Solution Approach 2:
The patent introduces dimensional complexity by varying the reflective rate across different spatial regions of the reflective plate. This creates multiple light paths in different directions and planes, effectively increasing the light mixing path length without increasing the overall thickness of the 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 achieves a better light mixing effect, reduces the thickness of the backlight module, and enhances the display's uniformity and contrast by distributing light more evenly, making it suitable for thinner LCD devices and applications like commercial billboards.
Implementation Method 1
The reflective assembly has a plurality of first partition plates disposed along a first direction, a plurality of second partition plates disposed along a second direction and a plurality of reflective structures. The plurality of first partition plates and the plurality of second partition plates cross with each other to form a plurality of reflective holes.
Data Source
AI summary
A light source module includes a substrate, a reflective assembly and a plurality of point light sources. The reflective assembly is disposed above the substrate and has a plurality of first partition plates disposed along a first direction, a plurality of second partition plates disposed along a second direction and a plurality of reflective structures. The first and second partition plates cross with each other to form a plurality of reflective holes. An upper surface of the substrate is partially exposed to the reflective holes. The reflective structures are disposed in the reflective holes respectively. The first partition plates, the second partition plates and the reflective structures are integrally formed. The point light sources are disposed above the substrate, located in the reflective holes respectively, and located below the reflective structures respectively. Thus, the light source module can significantly reduce the light mixing distance.