Multi-Layer Light Guide Structure With Internal Dot Structures
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Solution Overview
Problem
Manufacturing dot structures inside light guide plates for uniform light emission in flat display devices is challenging, as existing methods struggle to effectively arrange and bond these structures within the light guide layers.
Innovation Solution
A light guide structure comprising at least two light guide layers with dot structures between them, where the dot structures are formed by concave dots on opposing inner surfaces of the layers, and a softening layer is used to bond the layers together, reducing optical energy loss and improving light uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If dot structures are arranged at the surface of the light guide plate to improve light uniformity, then the light emission uniformity is improved, but the manufacturing difficulty increases due to challenges in forming and bonding dot structures inside the light guide layers
Solution Approach 1:
The light guide plate is divided into multiple light guide layers (first light guide layer and second light guide layer), with dot structures formed between the layers. This segmentation allows the dot structures to be easily formed on the surfaces of individual layers using conventional techniques, then bonded together, avoiding the difficulty of forming internal dot structures in a single thick layer.
Solution Approach 2:
The dot structures are nested between the first and second light guide layers, with concave dots formed on the inner surfaces of both layers that correspond to each other in position. This nesting approach allows the dot structures to be integrated within the light guide plate structure while maintaining ease of formation through surface-level processing and bonding.
2Manufacturing precision
If multiple light guide layers are stacked to form internal dot structures, then the image excellence rate and concealment performance improve, but the manufacturing complexity increases
Solution Approach 1:
Concave dots are preliminarily formed on the inner surfaces of the first and second light guide layers before bonding. This preliminary action ensures precise positioning and alignment of the dot structures, improving image excellence rate while simplifying the overall manufacturing process by separating the dot formation step from the bonding step.
Solution Approach 2:
The invention changes the physical state or properties of the bonding interface between layers, using concave dot geometries that correspond to each other in position. This parameter change in the bonding interface design enables easier alignment and bonding while maintaining high manufacturing precision for the internal dot structures.
3Illumination intensity
If dot structures are formed inside the light guide plate to increase duty ratio, then the luminous effect and brightness improve, but the optical energy loss increases during the bonding process
Solution Approach 1:
Concave dots with curved surfaces are formed on the inner surfaces of the light guide layers instead of flat or sharp-edged structures. This curvature design reduces light scattering and reflection at the bonding interface, minimizing optical energy loss while maintaining high duty ratio and improving luminous effect.
4Ease of manufacture
If conventional surface dot structures are used, then the manufacturing process is simple, but the concealment performance and image quality are insufficient
Solution Approach 1:
The invention transitions from surface-level dot structures to internal dot structures by adding a vertical dimension - stacking multiple light guide layers with dot structures between them. This dimensional change improves concealment performance and image quality while maintaining manufacturing simplicity through the use of conventional surface dot formation techniques on each layer.
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 enhances image excellence rate, concealment performance, and luminous effect, achieving high brightness and improved uniformity of light emission by arranging dot structures inside the light guide structure, which increases the duty ratio of the dot structures and enhances the overall display quality.
Implementation Method 1
a softening layer is used to bond the layers together
Data Source
AI summary
A light guide structure, a manufacturing method of the light guide structure, a module and a display device are provided. The light guide structure includes: at least two light guide layers; and a plurality of dot structures between adjacent ones of the light guide layers.