Backlight Module Light Guide Grooves for Uniform Mini-LED Output
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Solution Overview
Problem
Mini-LED backlight modules in liquid crystal display panels face issues of high manufacturing cost due to multi-layered light-splitting structures and low brightness due to light loss.
Innovation Solution
A backlight module design featuring a light guide plate with grooves and concave parts that refract and diffuse light without additional light-splitting films, combined with reflective and protrusion structures to enhance brightness uniformity and reduce light loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multi-layered light-splitting structures are used in Mini-LED backlight modules, then brightness uniformity is improved, but manufacturing cost increases
Solution Approach 1:
The patent extracts and eliminates the multi-layered light-splitting films from the backlight module structure. Instead of using multiple stacked light-splitting layers, the invention uses a simplified single-layer light guide plate with specifically designed groove structures that perform the light-splitting function, thereby reducing manufacturing complexity and cost while maintaining brightness uniformity
Solution Approach 2:
The light guide plate is segmented into multiple grooves with different depths and configurations. These grooves are arranged in specific patterns to divide and redirect light from LED sources, creating uniform brightness distribution across the display panel without requiring additional light-splitting film layers
2Illumination intensity
If multi-layered light-splitting structures are used in Mini-LED backlight modules, then brightness uniformity is improved, but light loss increases
Solution Approach 1:
The patent transitions from using multiple planar film layers to a three-dimensional groove structure within the light guide plate. The grooves have varying depths and cross-sectional shapes that enable light redirection in multiple dimensions, achieving uniform brightness distribution while minimizing light absorption and scattering losses associated with multiple film interfaces
3Illumination intensity
If additional light-splitting films are added to improve brightness uniformity, then manufacturing cost increases, but the structure becomes more complex
Solution Approach 1:
The patent merges the light guide function and the light-splitting function into a single integrated light guide plate structure. The grooves are directly formed within the light guide plate material, combining what were previously separate components (light guide plate + multiple light-splitting films) into one unified structure, thereby simplifying the overall device architecture and reducing manufacturing steps
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 design improves brightness uniformity and reduces manufacturing costs by optimizing light distribution and utilization, eliminating the need for additional light-splitting films.
Implementation Method 1
a bottom of the grooves is provided with a plurality of first concave parts disposed at intervals, and each of the first concave parts is defined with an arc surface recessed towards a direction away from the substrate
Implementation Method 2
a reflective layer is disposed between the substrate and the light guide plate between adjacent light-emitting chips
Data Source
AI summary
The disclosure discloses a backlight module and a display device including the same. The backlight module includes a substrate, a light source assembly disposed on the substrate and including a plurality of light-emitting chips disposed at intervals, and a light guide plate disposed on the light source assembly. A surface of the light guide plate facing the substrate is provided with a plurality of grooves where one of the light-emitting chips is correspondingly disposed in one of the grooves, a bottom of each of the grooves is provided with a plurality of first concave parts disposed at intervals, and each of the first concave parts is defined with an arc surface recessed towards a direction away from the substrate.