Light Guide Plate with Asymmetric Inclined Surfaces
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Solution Overview
Problem
Conventional light guide plates experience light leakage due to the connection of side portions directly to flat optical surfaces, leading to inefficient light utilization and increased processing time during mold formation.
Innovation Solution
A light guide plate design featuring stripe structures and light-adjusting structures between adjacent stripes, where the light-adjusting structures have inclined surfaces that prevent direct connection to the flat surface, reducing light leakage and allowing precise control over light reflection and emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the side portion of the microstructure is directly connected to the flat optical surface, then the manufacturing process is simpler, but light leakage occurs and light utilization efficiency decreases
Solution Approach 1:
The patent applies curvature by replacing the flat connection surface with an inclined surface that forms a non-symmetrical shape. The light-adjusting structure includes a first inclined surface and a second inclined surface that are not perpendicular to the base surface, creating a curved transition zone that prevents light leakage while maintaining manufacturing feasibility through molding processes.
Solution Approach 2:
The patent employs asymmetry by designing the light-adjusting structure with non-symmetrical inclined surfaces. The first and second inclined surfaces have different angles and orientations relative to the base surface, creating an asymmetric configuration that effectively guides light while preventing the symmetrical light leakage paths that occur with flat connections.
2Loss of time
If the side portion is directly connected to the optical surface, then the processing time is shorter, but light utilization efficiency decreases due to light leakage
Solution Approach 1:
The inclined surfaces create a curved transition zone that guides light effectively while being manufacturable through standard molding processes. This curved geometry prevents light leakage without requiring complex multi-step processing, thereby maintaining reasonable processing time while significantly improving light utilization efficiency.
Solution Approach 2:
The patent changes the geometric parameters of the connection interface by introducing inclined surfaces with specific angles rather than using a flat perpendicular connection. This parameter change optimizes the light guidance path and prevents leakage while remaining compatible with existing manufacturing capabilities, balancing processing time and light utilization efficiency.
3Ease of manufacture
If conventional flat optical surfaces are used, then the manufacturing process is simpler, but light reflection and emission cannot be precisely controlled
Solution Approach 1:
The inclined surfaces create a curved transition zone that guides light effectively while being manufacturable through standard molding processes. This curved geometry prevents light leakage without requiring complex multi-step processing, thereby maintaining reasonable processing time while significantly improving light utilization efficiency.
Solution Approach 2:
The patent applies local quality by creating specific inclined surfaces at particular locations and orientations within the light-adjusting structure. The first and second inclined surfaces are positioned and angled to specifically control light reflection and emission in desired directions, enabling precise optical control while maintaining overall manufacturing simplicity through integrated molding.
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 enhances light utilization efficiency by preventing light leakage and allowing precise control over light reflection, reducing processing time and achieving improved optical effects.
Implementation Method 1
the side portion 13 is directly connected to the optical surface (that is a flat surface) of the light guide plate, the total internal reflection principle of the original flat surface will not meet, thus causing the light to leak from the connection between the side portion 13 and the optical surface of the light guide plate
Implementation Method 2
The first light active surface and the second light active surface are inclined towards different directions and formed a non-symmetrical shape, and a first included angle is formed between the first light active surface and the optical surface, and a second included angle is formed between the second light active surface and the optical surface
Data Source
AI summary
A light guide plate includes a main body, stripe structures, and light-adjusting structures. The main body includes a light-incident surface and an optical surface. The stripe structures are disposed on the optical surface. The light-adjusting structures are disposed between two adjacent stripe structures. Each of the light-adjusting structures includes a first light active surface and a second light active surface. The first light active surface faces towards the light-incident surface. The second light active surface faces towards an opposite light-incident surface. The first light active surface and the second light active surface are inclined towards different directions and formed a non-symmetrical shape. A first included angle is formed between the first light active surface and the optical surface. A second included angle is formed between the second light active surface and the optical surface. The first included angle and the second included angle are acute angles.