Light Guide Panel Protrusions Prevent Reflector Abrasion
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Solution Overview
Problem
Conventional backlight modules for LCD devices face challenges in protecting microstructures on light guide plates from abrasion and damage, leading to optical characteristic loss and increased production costs due to scrapes and vibrations.
Innovation Solution
The design incorporates a light guide panel with microstructures and protrusions on its surface, where the protrusions, rather than the microstructures, contact the reflector, creating a gap and preventing direct contact that causes abrasion, thereby reducing damage and enhancing production yield and cost efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If microstructures on the light guide plate contact directly with the reflector, then the light guide plate can achieve uniform brightness and effective light guidance, but the microstructures and reflector frequently damage each other through abrasion during transport and vibration
Solution Approach 1:
A protective layer is introduced as an intermediary between the microstructures on the light guide plate and the reflector. This protective layer prevents direct contact and abrasion between the microstructures and reflector while allowing the light guidance function to be maintained, thus resolving the contradiction between protection and optical performance
Solution Approach 2:
The light guide plate structure is segmented into functional zones: the microstructures remain on the light guide plate for optical function, while a separate protective layer is added between the microstructures and reflector. This segmentation allows each component to perform its specific function without direct harmful contact
2Loss of energy
If the light guide plate uses total internal reflection to guide light paths, then high light utilization efficiency is achieved, but the refractive index difference with ambient atmosphere creates sensitivity to surface defects and abrasion
Solution Approach 1:
The protective layer serves as a mediator that shields the microstructures from external damage while preserving the optical characteristics needed for total internal reflection. This allows the light guide plate to maintain high light utilization efficiency without being vulnerable to surface defects from abrasion
3Productivity
If conventional backlight modules are designed with direct contact between microstructures and reflector, then the structure is simple and easy to manufacture, but production yield decreases due to abrasion damage during transport and vibration tests
Solution Approach 1:
The protective layer is introduced as a necessary intermediary component that prevents abrasion damage during transport and vibration tests. Although this increases structural complexity, it significantly improves production yield by preventing defective products, thus resolving the contradiction between simplicity and productivity
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
This configuration effectively reduces the occurrence of scrapes and abrasion, protecting the microstructures and reflector, leading to improved production yield and reduced production costs by preventing damage during transport and vibration tests.
Implementation Method 1
Due to the fact that the refractive index of a light guide plate is greater than ambient atmosphere, light paths within the light guide plate travel mostly by way of total reflection
Implementation Method 2
a plurality of microstructures is disposed on part of the bottom surface or top surface of the light guide plate to enhance overall light output uniformity and luminance
Data Source
AI summary
The present invention provides a light guide panel and a backlight module using the light guide panel. The light guide panel is disposed corresponding to a light source module of the backlight module. The light guide panel mainly comprises a plate, a plurality of microstructures and a plurality of protrusions. The plate is disposed close to the light source module and includes a microstructure surface. The microstructures and the protrusions are disposed on the microstructure surface, and the heights of the protrusions are greater than those of the microstructures, and a plurality of the microstructures are disposed between the adjacent protrusions.