Backlight Module Reflective Member for Brightness Homogeneity
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Solution Overview
Problem
Narrow-framed liquid crystal displays experience high bright spots due to uneven light distribution from side-mounted backlight modules, which deteriorate display quality.
Innovation Solution
A backlight module with a reflective member arranged between light source luminous points, reflecting scattered light into the light guide plate to achieve homogeneous brightness, and optionally incorporating a reflective sheet and frame to enhance light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If a side-mounted backlight module is used to make the liquid crystal display lighter and thinner, then the weight and thickness are reduced, but high bright spots appear in the light source area due to uneven light distribution
Solution Approach 1:
The patent applies local quality by placing reflective members at specific locations (between adjacent luminous points) rather than uniformly throughout the structure. This localized approach targets the specific problem areas where light distribution is uneven, reflecting scattered light back into the light guide plate only where needed to eliminate bright spots without affecting overall light output.
Solution Approach 2:
The reflective member acts as an intermediary element between the light source and the light guide plate. It mediates the interaction by capturing scattered light that would otherwise be lost and redirecting it into the light guide plate, thereby improving brightness homogeneity without requiring changes to the light source or light guide plate themselves.
2Area of stationary object
If multiple luminous points are arranged along a line to illuminate the panel, then light coverage is improved, but scattered light creates bright spots in the light source area
Solution Approach 1:
The patent converts the harmful scattered light into a beneficial resource by using reflective members to capture and redirect it. Instead of allowing scattered light to create unwanted bright spots, the reflective members guide this light back into the light guide plate, where it contributes to uniform illumination. This transforms a problem (scattered light) into a solution (additional useful light).
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
Significantly improves brightness homogeneity, eliminating high bright spots and enhancing display quality by ensuring even light transmission across the liquid crystal display.
Implementation Method 1
The reflective member reflects scattered light that enters the space into the light guide plate
Implementation Method 2
the scattered light illuminates the concave member after passing through a focus of the concave member. This enables scattered light in all directions to be altered into parallel light
Data Source
AI summary
A backlight module and a liquid crystal display are related. The backlight module comprises a light guide plate and a light source arranged on a light-incident side of the light guide plate. The light source includes a plurality of luminous points that are arranged along a line and spaced from each other, and is arranged with a reflective member in a reflective side thereof away from the light guide plate, the reflective member directly facing a space formed between two adjacent luminous points. The reflective member reflects scattered light that enters the space into the light guide plate. The backlight module according to the present disclosure ensures rather homogeneous brightness in a light source area, and therefore substantially attenuates or even eliminates high bright spots that would otherwise appear in the liquid crystal display.