Diffusion Plate Grooves for Light Guide Microstructure Stability
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Solution Overview
Problem
Current light guide plates with Vcut microstructures face issues of vibration white spot and scratching due to relative movement between the diffusion plate and light guide plate, limiting the improvement in brightness and reliability of mobile phone displays.
Innovation Solution
A diffusion plate with grooves that accommodate microstructures of the light guide plate, featuring grooves wider and deeper than the microstructures, and protrusion structures on the diffusion plate substrate to support and stabilize the microstructures, reducing relative movement and pressure-induced damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the diffusion plate directly contacts the light guide plate with Vcut microstructures, then the structure is simple, but relative movement occurs causing white spots and scratching
Solution Approach 1:
The diffusion plate surface is segmented into grooves and protrusion structures. The grooves accommodate the Vcut microstructures of the light guide plate, while the protrusion structures provide additional support points. This segmentation allows the diffusion plate to maintain simple overall structure while creating localized features that prevent relative movement and eliminate white spots and scratching.
2Reliability
If grooves are formed to accommodate microstructures, then stability improves, but manufacturing complexity increases
Solution Approach 1:
The grooves and protrusion structures are pre-formed on the diffusion plate before assembly with the light guide plate. By preparing these stabilizing features in advance during the diffusion plate manufacturing process, the patent eliminates the need for complex post-assembly operations, thereby improving reliability without significantly increasing overall manufacturing complexity.
3Use of energy by moving object
If the diffusion plate is made thinner to reduce power consumption, then energy efficiency improves, but structural stability deteriorates
Solution Approach 1:
The diffusion plate incorporates localized grooves and protrusion structures at specific contact points with the light guide plate. These localized features provide enhanced structural stability and prevent relative movement without requiring the entire diffusion plate to be thicker. This allows the plate to remain thin for energy efficiency while maintaining stability through strategically placed structural modifications.
Data Source
AI summary
A diffusion plate is provided. The diffusion plate includes a diffusion plate substrate, wherein the diffusion plate substrate includes grooves configured to accommodate microstructures of a light guide plate. The groove has a width larger than that of the microstructure, and the groove has a depth larger than a height of the microstructure. A method of manufacturing the diffusion plate and a backlight module are also provided. The groove of the diffusion plate provided by embodiments of the disclosure combines with the microstructure on the surfaces of the light guide plate to form a stable structure together so that the relative movement between them is reduced, and the white spot problem caused by the microstructures being scratched is also reduced.