Light Guide Plate Bottom Surface Concave Convex Structures
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Solution Overview
Problem
Existing light guide plates in backlight modules face challenges in achieving uniform light emission and optimal brightness, particularly due to limitations in light direction adjustment and refractive index utilization.
Innovation Solution
The light guide plate incorporates a bottom surface with spaced strip-shaped concave structures and convex structures, which adjust the light direction and create an air gap for improved refraction, enhancing forward brightness and production yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional flat bottom surface is used in the light guide plate, then the structure is simple and easy to manufacture, but the light direction adjustment is insufficient and forward brightness is reduced
Solution Approach 1:
The bottom surface is segmented into multiple functional regions: strip-shaped concave structures for light direction adjustment and convex structures for air gap formation. This segmentation allows different areas to perform different optical functions, improving forward brightness while maintaining manufacturing feasibility through standardized patterning processes
Solution Approach 2:
The invention transitions from a two-dimensional flat bottom surface to a three-dimensional structured surface with concave and convex features. This dimensional change enables additional optical functions (light direction control and air gap creation) without significantly increasing manufacturing complexity, as the structures can be formed through conventional molding or etching processes
2Illumination intensity
If the light guide plate is placed close to the reflective sheet for compact design, then the overall size is reduced, but the air gap is insufficient and refraction efficiency decreases
Solution Approach 1:
The convex structures on the bottom surface automatically generate the necessary air gap when the light guide plate is assembled with the reflective sheet. The protruding convex features physically displace the reflective sheet, creating air gaps without requiring additional spacers or complex assembly processes. This self-service mechanism achieves optimal refraction efficiency while maintaining a compact overall design
Solution Approach 2:
The convex structures are pre-formed on the bottom surface during light guide plate manufacturing, preparing the surface in advance to create air gaps during assembly. This preliminary action ensures that the optimal air gap is automatically formed when the backlight module is assembled, eliminating the need for post-assembly adjustments or additional components
3Illumination intensity
If dispersed point light sources are used to achieve uniform light emission, then the light distribution is improved, but the optical utilization efficiency is reduced
Solution Approach 1:
The bottom surface features localized concave and convex structures that create different optical properties in different regions. The strip-shaped concave structures in specific areas enhance light direction control and refraction, while convex structures create air gaps for improved optical coupling. This local quality variation optimizes both light distribution uniformity and optical utilization efficiency by addressing specific optical challenges in different zones of the light guide plate
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 effectively increases forward brightness by optimizing light direction and refraction, while also improving the optical utilization efficiency and production yield by providing a better air gap and guiding light efficiently.
Implementation Method 1
the bottom surface is provided with a plurality of spaced strip-shaped concave structures extending along the first direction and arranged along the second direction, and at least one convex structure protruding from the bottom surface is arranged between adjacent concave structures
Data Source
AI summary
A light guide plate and a backlight module, including: a light incident surface; a first side surface, the first side surface arranged opposite the light incident surface; a light exiting surface connecting the light incident surface and the first side surface; a bottom surface arranged opposite the light exiting surface, where the bottom surface connects with the light incident surface and the first lateral surface; a second side surface connecting the light incident surface, the first side surface, the bottom surface and the light exiting surface; a third side surface arranged opposite the second side surface, and the third side surface connects with the light incident surface, the first side surface, the bottom surface and the light exiting surface. The bottom surface has a plurality of strip-shaped concave structures, and at least one convex structure protruding outwards from the bottom surface is provided between adjacent concave structures.