Backlight Module Reflector Units for Uniform Illumination
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Solution Overview
Problem
Current backlight modules with light-emitting diodes suffer from uneven light brightness due to optical limitations, which existing technologies attempt to address by using multilayer optical films and reflective films, increasing manufacturing costs and design complexity.
Innovation Solution
A backlight module design incorporating a light source array with a reflector module composed of reflector units featuring flat, first wall, and corner wall portions, where the heights of these elements are strategically varied to improve light distribution and reduce shadows, achieving better contrast and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple light sources are arranged in an array to provide backlight, then the backlight coverage is improved, but the light brightness becomes uneven
Solution Approach 1:
Each reflector unit is designed with different wall heights (first wall portion, second wall portion, and corner wall portion) to create localized light reflection characteristics. The varying wall heights redirect light from different angles, ensuring uniform light distribution across the backlight while maintaining adequate coverage area.
Solution Approach 2:
The reflector module is divided into multiple discrete reflector units, each associated with a specific light source. This segmentation allows independent optimization of each reflector unit's geometry to control light distribution patterns, preventing brightness unevenness while maintaining overall coverage.
2Illumination intensity
If multilayer optical films and reflective films are used to improve brightness uniformity, then the light distribution is improved, but the manufacturing cost and design complexity increase
Solution Approach 1:
The patent extracts the light redistribution function from separate optical films and integrates it directly into the reflector units' geometric structure. By embedding the light control functionality within the reflector unit design itself, the system eliminates the need for additional multilayer optical films, thereby reducing manufacturing complexity while maintaining brightness uniformity.
3Illumination intensity
If wall portions of reflector units are elevated to different heights, then the light distribution uniformity is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent employs specific geometric parameters for the wall portions (first wall portion, second wall portion, corner wall portion with defined height relationships) that optimize light distribution. By carefully selecting and standardizing these dimensional parameters, the design achieves uniform light distribution while maintaining manufacturability through controlled precision requirements.
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 enhances light uniformity and contrast, improving the overall display quality and user experience by optimizing light source placement and reflection within the backlight module.
Implementation Method 1
The reflector module has a plurality of reflector units, which are arranged along a first direction and a second direction and respectively associated with the light sources. Each of the reflector units has a flat portion, a first wall portion, and a corner wall portion.
Data Source
AI summary
A backlight module includes a light source array, a reflector module, and an optical film. The light source array includes a plurality of light sources. The light emitted from the light source can be refracted by the lens unit to obtain a specific light-output angle and uniformity. The reflector module includes a plurality of reflector units. Each reflector unit includes a flat portion, a first wall portion, and a corner wall portion, which have structures and arrangements designed to enable the light source to achieve a display effect of less shadows and better contrast.