Backlight Module Concave Portions Reduce Thickness
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Solution Overview
Problem
Conventional direct-type backlight modules for liquid crystal display devices have oversized thickness, which cannot be reduced without compromising light uniformity or increasing manufacturing costs.
Innovation Solution
The backlight module features a backboard with concave portions for mounting light sources via their heat sinks, allowing for a reduced backlight cavity height without affecting light quality or increasing costs, utilizing a combination of strip and non-strip concave portions to accommodate LEDs and optical films effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the light-mixing distance is directly reduced, then the thickness of the backlight module is reduced, but the uniformity of the lights emitted from the backlight module decreases
Solution Approach 1:
The backboard is segmented into multiple concave portions that accommodate individual light sources, allowing each light source to be positioned optimally for light mixing while maintaining overall compactness. This segmentation enables reduced light-mixing distance without compromising uniformity.
Solution Approach 2:
The invention transitions from a planar backboard to a three-dimensional structure with concave portions, utilizing the vertical dimension to position light sources at different depths. This dimensional change allows reduced overall thickness while maintaining adequate light-mixing distance within the concave regions.
2Manufacturing precision
If the number of light sources is increased, then the uniformity of lights is maintained, but the manufacturing cost increases
Solution Approach 1:
Different regions of the backboard are given different functions through the design of strip concave portions and non-strip concave portions, allowing optimized light source placement in each region. This local differentiation maintains light uniformity without requiring a proportional increase in the total number of light sources.
3Length of stationary object
If the height of the backlight cavity is reduced, then the thickness of the backlight module is reduced, but the light-emitting quality is affected
Solution Approach 1:
The light sources are nested within the concave portions of the backboard, which are themselves integrated into the overall backlight module structure. This nested arrangement allows the light sources to be positioned close to the diffuser panel while maintaining adequate space for light mixing within the concave regions.
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
This configuration reduces the thickness of the backlight module while maintaining light uniformity and optical quality, without increasing manufacturing costs, by ensuring the light-emitting surface distance to the diffuser panel matches the backboard-to-diffuser panel distance, thereby enhancing structural strength and light-emitting efficiency.
Implementation Method 1
a heat sink connected to the base for dissipating heat
Data Source
AI summary
The present invention relates to a backlight module and a corresponding liquid crystal display panel. The backlight module includes a backboard having multiple concave portions formed on an inner surface of the backboard and multiple light sources mounted in the concave portions. The backlight module and the corresponding liquid crystal display device of the present invention can reduce the thickness of direct-type backlight module without affecting the optical quality of the lights emitted from the backlight module and increasing the manufacturing cost of the backlight module.