Light Guide Assembly With Through Hole Light Leakage Control
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Solution Overview
Problem
Conventional light guide plates with through holes suffer from light leakage, resulting in reduced light energy and optical quality due to continuous light transmission, leading to dark bands in reflective display devices.
Innovation Solution
A light guide assembly featuring a light guide plate with first and second light incident structures protruding from either side of a through hole, where light sources are positioned on the edges of these structures to minimize light leakage by creating a uniform surface light source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a through hole is formed in the light guide plate to accommodate mechanisms, then the mechanism can be conveniently disposed, but light leakage occurs through the through hole causing reduced light energy and optical quality
Solution Approach 1:
The patent applies local quality by creating light incident structures with different refractive indices at specific locations around the through hole. These structures have higher refractive indices than the light guide plate material, creating localized optical property changes that prevent light leakage specifically at the through hole region while maintaining normal light transmission in other areas of the light guide plate.
Solution Approach 2:
The light incident structures act as intermediary elements between the light guide plate and the through hole. These structures serve as optical mediators that redirect and control light paths, preventing direct light leakage through the through hole while allowing the through hole to maintain its mechanical function for accommodating components.
2Ease of operation
If a through hole is formed in the light guide plate, then a mechanism can be conveniently disposed, but light leakage forms a dark band in the area opposite the light source
Solution Approach 1:
The patent applies local quality by creating light incident structures with different refractive indices at specific locations around the through hole. These structures have higher refractive indices than the light guide plate material, creating localized optical property changes that prevent light leakage specifically at the through hole region while maintaining normal light transmission in other areas of the light guide plate.
Solution Approach 2:
The light incident structures act as intermediary elements between the light guide plate and the through hole. These structures serve as optical mediators that redirect and control light paths, preventing direct light leakage through the through hole while allowing the through hole to maintain its mechanical function for accommodating components.
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 effectively reduces light leakage through the through hole, maintaining light energy and improving optical quality by ensuring uniform illumination across the light guide plate.
Implementation Method 1
light transmission within the light guide plate is continuous
Data Source
AI summary
A light guide assembly includes a light guide plate, at least one first light source, and at least one second light source. The light guide plate has a main body, at least one first light incident structure, and at least one second light incident structure. A center of the main body has a through hole, and a straight line passing through the through hole defines a first half part and a second half part of the main body. The first light incident structure protrudes from the first half part and extends away from the main body, and the second light incident structure protrudes from the second half part and extends away from the main body. The first light source is located on an edge of the first light incident structure. The second light source is located on an edge of the second light incident structure.