Light Guide Plate Blank Region Convex Structures
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Solution Overview
Problem
Conventional backlight designs suffer from light loss due to the destruction of total reflection conditions caused by the adhesive preparation structure on the light guide plate, leading to reduced light utilization rates.
Innovation Solution
A light guide plate with a blank region featuring convex point structures that reduce the contact area with the adhesive preparation structure, maintaining the total reflection property and improving light distribution, while a flexible printed circuit board is adhered to the blank region through a specific adhesive structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the adhesive preparation structure is closely adhered to the blank region of the light emergent surface, then the bonding strength is improved, but the total reflection condition is destroyed causing light loss
Solution Approach 1:
The patent applies local quality by creating convex point structures at specific locations within the blank region, rather than uniformly modifying the entire surface. These localized convex structures provide adhesive bonding points while leaving the majority of the blank region surface intact to maintain total reflection properties, thus resolving the contradiction between bonding strength and light loss
Solution Approach 2:
The patent segments the blank region surface into multiple convex point structures distributed across the area. This segmentation allows the adhesive to bond at discrete points rather than requiring continuous surface contact, preserving the optical reflection properties of the intervening areas while achieving adequate bonding strength
2Reliability
If the adhesive preparation structure with densely distributed adhesive particles is used, then the adhesion is improved, but light scattering increases reducing light utilization rate
Solution Approach 1:
The patent implements local quality by concentrating adhesive particles into convex point structures rather than distributing them densely across the entire blank region. This localized approach provides sufficient adhesion at the convex points while allowing light to pass through or reflect off the areas between these points without scattering, thereby maintaining high light utilization rate
Solution Approach 2:
The adhesive particle distribution is segmented into discrete convex point structures rather than a continuous dense layer. This segmentation reduces the total surface area occupied by adhesive particles from 90%+ to a much smaller fraction, minimizing light scattering while maintaining reliable adhesion through the concentrated convex points
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 enhances light utilization by minimizing light scattering and maintaining the original reflection properties of the blank region, thereby improving the overall brightness and efficiency of the backlight.
Implementation Method 1
the total reflection condition of the blank region can be destroyed, so that part of light (e.g., light B in FIG. 1 and FIG. 2) is scattered before reaching a mesh point region of the light guide plate
Data Source
AI summary
A light guide plate, a backlight and a display device are provided. The light guide plate includes a light incident surface, and a light emergent surface intersecting with the light incident surface, the light emergent surface being provided with a blank region close to the light incident surface; the blank region is provided with a plurality of convex point structures thereon. The light guide plate can reduce a disadvantageous effect of an adhesive preparation structure on the backlight and improve a light utilization rate of the backlight.