Light Conducting Device Annular Sub-Receiving Surfaces Narrow Angle View
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Solution Overview
Problem
Existing light guide plates in backlight modules suffer from scattering phenomena, resulting in a large angle of view for light, which affects the display effect in liquid crystal display (LCD) devices.
Innovation Solution
A light conducting device with a light receiving surface featuring annular sub-receiving surfaces that emit light in a single direction, utilizing a combination of an inner free-form surface, reflecting surfaces, and a ladder-type structure to collimate and redirect light, thereby achieving a narrow angle of view for the backlight source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a prism-type light guide plate is used to improve brightness, then the brightness of the backlight module is improved, but the angle of view of light becomes large due to scattering phenomena, affecting display effect
Solution Approach 1:
The light receiving surface is divided into multiple annular sub-receiving surfaces, each responsible for receiving light from specific light sources and directing it to specific regions. This segmentation allows precise control over light distribution, eliminating scattering while maintaining brightness.
Solution Approach 2:
Different regions of the light conducting device are assigned different functions: the inner free-form surface handles light collection, the reflecting surfaces handle light redirection, and the annular sub-receiving surfaces handle light distribution. Each region is optimized for its specific function, preventing scattering while maintaining overall brightness.
2Illumination intensity
If a prism-type light guide plate is used to increase brightness, then the illumination intensity is improved, but the angle of view becomes large, reducing display quality
Solution Approach 1:
The light conducting device uses a dynamic light distribution mechanism where the annular sub-receiving surfaces are positioned and oriented to actively direct light in specific directions. This dynamic control allows the system to maintain a narrow angle of view while providing sufficient illumination intensity.
Solution Approach 2:
The device changes the geometric parameters of light paths through the inner free-form surface and reflecting surfaces, transforming the light distribution pattern. By carefully designing the curvature and orientation of these surfaces, the system achieves both high illumination intensity and a narrow angle of view.
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 enables a direct light type backlight source with a narrow angle of view, enhancing the display effect by reducing light scattering and providing more uniform illumination over a larger area.
Implementation Method 1
an inner free-form surface configured to refract light emitted by the light source
Implementation Method 2
a plurality of reflecting surfaces configured to reflect light refracted by the inner free-form surface to the light receiving surface
Implementation Method 3
a plurality of annular sub-receiving surfaces configured to cause received light from the light source to be emitted in a single direction
Data Source
AI summary
The present disclosure provides a light conducting device, a backlight module and a display device. The light conducting device cooperates with a light source to form a backlight module. The light conducting device includes at least one light receiving surface. The light receiving surface includes a plurality of annular sub-receiving surfaces configured to cause received light from the light source to be emitted in a single direction.