Backlight Module Obtuse Angle Light Reflecting Surface
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Solution Overview
Problem
Conventional liquid crystal display devices suffer from light energy waste due to the limited incidence of light into the light guide plate, resulting in inefficient illumination and display dark regions above the light source.
Innovation Solution
A backlight module design featuring a light source on one side of a light guide plate with a light receiving surface and a light reflecting surface forming an obtuse angle, allowing light that cannot enter the guide plate to be reflected towards the display panel above the light source, thereby enhancing light utilization and reducing display dark regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If light source is placed on the side of light guide plate, then light can be guided through the plate, but light in edge regions cannot be incident into the light guide plate resulting in light energy waste
Solution Approach 1:
The patent converts the harmful light that cannot enter the light guide plate into a beneficial resource by introducing a reflecting surface. This reflecting surface redirects the previously wasted light toward the light guide plate, allowing it to be utilized for illumination, thus transforming light energy waste into useful illumination.
Solution Approach 2:
The patent introduces a reflecting surface as an intermediary element between the light source and the light guide plate. This intermediary redirects light paths that would otherwise be wasted, serving as a mediator to transfer light energy from regions where it cannot directly enter the guide plate to regions where it can be effectively utilized.
2Illumination intensity
If light source is placed on the side of light guide plate, then illumination can be provided, but display dark region is formed above the light source
Solution Approach 1:
The patent converts the harmful dark region above the light source into a beneficial illuminated area. By using the reflecting surface to redirect light toward this region, the previously dark area is transformed into an illuminated zone, eliminating the display dark region and improving overall illumination uniformity.
Solution Approach 2:
The patent addresses the dark region problem by introducing a spatial dimension solution - the reflecting surface is positioned at a specific angle and location to redirect light into the dark region above the light source. This dimensional arrangement allows light to reach areas that would otherwise be inaccessible, eliminating the dark region and improving illumination uniformity.
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
This configuration effectively utilizes non-incident light energy, improving the light energy utilization ratio and enabling a narrow bezel or bezelless display by illuminating previously dark regions, thus enhancing the overall display performance.
Implementation Method 1
a light reflecting surface above the light receiving surface, wherein an angle formed by the light receiving surface and the light reflecting surface in a direction toward the inside of the light guide plate is an obtuse angle
Data Source
AI summary
Embodiments of the present disclosure relate to a backlight module and a display device. The backlight module includes a light source and a light guide plate, the light source provided on at least one side of the light guide plate, wherein a side of the light guide plate facing the light source includes a light receiving surface facing the light source and a light reflecting surface above the light receiving surface, wherein an angle formed by the light receiving surface and the light reflecting surface in a direction toward inside of the light guide plate is an obtuse angle. According to the backlight module and the display device provided by the present disclosure, light waste may be reduced and the utilization ratio of light energy may be improved.