Light Guide Plate with Eye-Shaped Structures for Backlight Modules
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Solution Overview
Problem
Current light guide plates suffer from excessive scattered light when guiding light, making it difficult to achieve the desired light exit direction, which affects the brightness and optical properties of backlight modules.
Innovation Solution
A light guide plate design featuring a light exit surface, a light incident surface, and a bottom surface with light exit structures comprising a front mound, a back mound, and a concave eye-shaped portion with specific slope surfaces, forming an arc-shaped junction to improve light guidance and exit effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If optical micro structures are formed in light guide plates to guide light exit, then light distribution is improved, but excessive scattered light is generated causing deviation from expected exit direction
Solution Approach 1:
The light guide plate is segmented into multiple functional regions: a light incident surface for light entry, a light exit surface for directed light output, and a bottom surface with structured light exit structures. This segmentation allows different areas to perform specialized functions, with the bottom surface structures specifically designed to control and direct light exit while minimizing unwanted scattering.
Solution Approach 2:
The bottom surface of the light guide plate is equipped with specialized light exit structures that have different optical properties from other surfaces. These local structures are designed with specific geometries to provide enhanced light extraction efficiency in controlled directions, creating local quality improvements without compromising overall light guidance.
2Device complexity
If conventional light guide plates are used, then device thickness and weight are reduced, but additional optical components or films are required to achieve desired optical properties
Solution Approach 1:
The light guide plate is designed to perform multiple functions simultaneously: it serves as both the light guidance medium and the light exit control structure. The bottom surface light exit structures integrate the functions of light extraction and direction control that would traditionally require separate optical films or components, making the light guide plate a multi-functional element that reduces overall device complexity.
Solution Approach 2:
The invention merges the light guidance function and light exit control function into a single integrated light guide plate structure. The bottom surface light exit structures are formed as an integral part of the light guide plate, combining what would traditionally be separate components (light guide plate plus optical films) into one unified structure, thereby reducing the total number of components while maintaining or improving optical performance.
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 improved light guide plate enhances light exit effectiveness and brightness, potentially reducing the need for additional optical components or films, thereby decreasing production costs, thickness, and weight of devices.
Implementation Method 1
a light guide plate... mainly used for conducting and distributing lights effectively
Implementation Method 2
properties of the light guide plate will determine the brightness and light exit effectiveness
Data Source
AI summary
The present invention provides a light guide plate having a light exit surface, a light incident surface and a bottom surface. In the said light guide plate, the bottom surface is opposite to the light exit surface, and the light incident surface connects the light exit surface and the bottom surface. A plurality of light guide structures are formed on the bottom surface, and each of the light guide structure includes a front mound protruding above the bottom surface, a back mound protruding above the bottom surface and located at the side of the front mound opposite to the light incident surface, and a concave eye-shaped portion caved in from the bottom surface and located between the front mound and the back mound. The concave eye-shaped portion has a first slope surface connected with the front mound and a second slope surface connected with the back mound, wherein the first slope surface and the second slope surface are connected at the bottom of the concave eye-shaped portion so as to form an arc-shaped connection border junction.