Backlight Assembly Concave Pattern Light Guide Plate
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Solution Overview
Problem
In display apparatus based on MEMS systems, increasing the density of convex patterns on the light reflection surface of the light guide plate leads to reduced light-using efficiency due to scattered light, and the requirement for a glass substrate increases the thickness of the display apparatus.
Innovation Solution
A backlight assembly with a concave pattern formed on the reflection layer and insulation layer, where the concave pattern includes inclined surfaces, enhances light reflection and reduces thickness by eliminating the need for additional glass substrates, improving light output efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the density of convex patterns on the light reflection surface is increased, then light uniformity is improved, but light-using efficiency is degraded due to scattered light
Solution Approach 1:
The patent inverts the conventional convex pattern design by using a concave pattern on the light reflection surface. This inversion allows the light to be reflected more effectively toward the light exiting surface while reducing scattering, thereby maintaining light uniformity without degrading light-using efficiency.
Solution Approach 2:
The patent changes the geometric parameter of the light reflection surface from convex to concave patterns. This parameter change fundamentally alters the light reflection behavior, enabling the system to achieve both high light uniformity and high light-using efficiency simultaneously by controlling the direction and concentration of reflected light.
2Strength
If a glass substrate is added for the opening plate, then structural integrity is improved, but device thickness is increased
Solution Approach 1:
The patent merges the functions of the opening plate and light guide plate by making the light guide plate itself serve as the opening plate. This integration eliminates the need for a separate glass substrate, thereby maintaining structural integrity while reducing the overall device thickness.
Solution Approach 2:
The light guide plate is designed to perform multiple functions: it guides light from the light source, provides structural support, and serves as the opening plate for light exit. This multi-functionality eliminates the need for additional components, reducing device thickness while maintaining structural integrity.
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 concave pattern design increases light output efficiency and reduces the thickness of the display apparatus by effectively recycling light and minimizing scattering, while maintaining a flat lower surface for improved light distribution.
Implementation Method 1
a reflection layer having a concave pattern is formed on the base substrate, and thus efficiency of light exiting from the base substrate and re-incident to the base substrate may increase
Implementation Method 2
the concave pattern includes inclined surfaces
Data Source
AI summary
A backlight assembly includes a light source part, a base substrate, an insulation layer, and a reflection layer. The base substrate includes a light incident surface into which the light from the light source part is incident, and a light exiting surface adjacent to the light incident surface and through which the light exits. The insulation layer is formed on the light exiting surface of the base substrate. The reflection layer is formed on the insulation layer and forms a concave pattern along with the base substrate and the insulation layer and has an opening portion through which the light exiting from the light exiting surface passes.