Backlight Module Reflecting Cover Segmentation
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Solution Overview
Problem
The existing backlight modules suffer from uneven brightness and reduced contrast due to interference between light-emitting units, especially when area dimming is applied.
Innovation Solution
A backlight module design that incorporates a reflecting cover with separated accommodating cavities to prevent light interference between light-emitting units, thereby improving brightness uniformity and contrast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple light-emitting units are turned on at the same time without isolation, then the overall illumination coverage is improved, but the brightness uniformity deteriorates due to light interference between units
Solution Approach 1:
The reflecting cover is divided into multiple separated accommodating cavities, each corresponding to one light-emitting unit. This segmentation isolates the light from each unit within its own cavity, preventing light interference between adjacent units while maintaining comprehensive illumination coverage across the light guide plate.
2Use of energy by moving object
If area dimming is applied to reduce power consumption, then the energy efficiency is improved, but the contrast ratio deteriorates due to light leakage from outside the dimmed area
Solution Approach 1:
The accommodating cavities are separated and isolated, allowing independent control of light emission from each light-emitting unit. When area dimming is applied, the reflecting cover structure ensures that light from active units does not leak into dimmed areas, maintaining high contrast ratios while achieving energy savings through selective dimming.
3Device complexity
If a single large accommodating cavity is used for multiple light-emitting units, then the device complexity is reduced, but the light interference between units increases
Solution Approach 1:
Instead of using a single large cavity, the reflecting cover is segmented into multiple smaller accommodating cavities, each housing one light-emitting unit. This segmentation effectively isolates light from each unit, preventing interference while keeping the overall structure relatively simple and integrated.
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 effectively prevents light interference between light-emitting units, enhancing the uniformity of the light source and improving contrast, especially during area dimming applications.
Implementation Method 1
The reflecting cover has a plurality of separated accommodating cavities. Each of the light-emitting units is disposed in one of the accommodating cavities. The light emitted by each of the light-emitting units is reflected to the light guide plate by the reflecting cover.
Data Source
AI summary
Embodiments of the present disclosure are directed to a backlight module and a display device. The backlight module includes a light source component, a reflecting cover, and a light guide plate. The light source component includes a light source substrate and a plurality of light-emitting units disposed on the light source substrate. The reflecting cover has a plurality of separated accommodating cavities, each of which is disposed in one of the accommodating cavities. The light-emitting units and the reflecting cover are located on one side of the light source substrate near the light guide plate. The light emitted by each of the light-emitting units is reflected to the light guide plate by the reflecting cover.