Modular Light Guide Plate Raised Dots Eliminate Adhesive Waveguide
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Solution Overview
Problem
Existing LED panel lights suffer from light loss and optical quality deterioration due to the formation of an optical waveguide effect by adhesive layers between the light guide plate and reflective sheet, leading to inefficient light extraction and shadow formation.
Innovation Solution
A modular light guide plate design featuring a light guide plate with raised dots on its lower surface, made of transparent optical material with dispersed optical particles, which diffuse and reflect light back to the upper surface, preventing the optical waveguide effect and enhancing light extraction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive layers are used to bond the reflective sheet to the light guide plate, then the reflective sheet can be securely attached, but the adhesive layers form an optical waveguide effect that causes light loss and shadow formation
Solution Approach 1:
The patent removes the adhesive layer entirely from the bonding interface between the reflective sheet and light guide plate. Instead, it uses a mechanical interlocking structure where the reflective sheet is directly attached to the lower surface of the light guide plate without any adhesive material, thereby eliminating the source of optical waveguide effects and light loss.
Solution Approach 2:
The patent introduces a reflective sheet as an intermediary element that is directly coupled to the light guide plate through a mechanical interlocking structure. This intermediary provides both the bonding function and the reflective function without requiring adhesive materials that would cause optical interference.
2Strength
If adhesive layers are used to bond the reflective sheet to the light guide plate, then the reflective sheet can be securely attached, but shadows are formed and optical quality deteriorates
Solution Approach 1:
The patent removes the adhesive layer that causes shadow formation and optical quality deterioration. By eliminating the adhesive material from the bonding interface, the optical path is cleared, preventing shadow formation while maintaining secure attachment through mechanical interlocking.
3Length of moving object
If the light guide plate is made thinner to achieve thinning trend, then the overall thickness is reduced, but light extraction efficiency becomes more difficult to maintain
Solution Approach 1:
The patent applies local quality enhancement by adding a light extraction structure (such as prisms or diffusers) at specific locations on the light guide plate. This allows the bulk of the light guide plate to remain thin while creating localized areas that efficiently extract light, thereby maintaining thinness without sacrificing light extraction efficiency.
Solution Approach 2:
The patent uses curved or angled light extraction structures on the surface of the light guide plate to enhance light extraction efficiency. The curved geometry helps to redirect light at optimal angles for extraction, maintaining efficiency even in thinner configurations.
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 design achieves uniform surface lighting, reduces light loss, and allows for a thinner LED panel light with improved optical quality by diffusely reflecting light from the lower surface to the upper surface, thereby enhancing overall light extraction efficiency.
Implementation Method 1
The light is incident from the side wall of the light guide plate, and then propagates forward in the light guide plate by means of total reflection principle
Implementation Method 2
When the total reflection is destroyed due to the light encountering the micro-structure of the surface of the light guide plate during the forward propagation process, part of the light will change the direction of propagation and exit from the upper and lower surfaces of the light guide plate
Implementation Method 3
a reflective plate is required to be disposed on the lower surface of the light guide plate for reflecting the light emitted from the lower surface back to the upper surface of the light guide plate
Data Source
AI summary
The present invention relates to a modular light guide plate comprising a light guide plate including a side wall used for entering the light to couple the light emitted by the LED into the interior of the light guide plate, an upper surface and a lower surface, and a reflective sheet arranged below the lower surface of the light guide plate and having a high reflectivity to the light emitted by the LED, wherein the lower surface of the light guide plate is provided with a raised dot, which is bonded to the lower surface of the light guide plate at the upper end thereof and to the upper surface of the reflective sheet at the lower end thereof, and the material of the dot body is a transparent optical material, and optical particles are uniformly dispersed in the dot, thereby having the advantages of high light extraction efficiency.