Light Guide Plate Convex Protrusions Frame Bonding
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Solution Overview
Problem
Conventional liquid crystal display devices face challenges in preventing light leakage and maintaining structural integrity due to convex protrusions on the light guide plate, which require larger fitted portions in the frame, potentially reducing the frame's strength and making assembly more complex.
Innovation Solution
A light-blocking member is used to bond convex protrusions on the light guide plate to recessed fitted portions in the frame, eliminating the need for optical sheet protrusions and allowing a stronger, thinner frame design, while adhesive tape secures optical sheets to prevent displacement and light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If convex protrusions are provided on the light guide plate to prevent displacement, then the optical sheet and light guide plate are secured, but the frame requires larger fitted portions which reduces frame strength
Solution Approach 1:
The patent introduces a bonding member as an intermediary component that bonds the convex protrusions of the light guide plate to the recessed fitted portions of the frame. This bonding member (adhesive tape or light-blocking member) transfers the securing function from the frame structure to a dedicated bonding component, allowing the frame to maintain smaller fitted portions and thus preserve frame strength while still achieving reliable displacement prevention through the bonding interface.
2Reliability
If convex protrusions are provided on the light guide plate, then displacement is prevented, but assembly becomes more complex
Solution Approach 1:
The patent merges multiple functions into the bonding member: it simultaneously serves as the bonding agent that attaches the light guide plate to the frame and as the light-blocking member that prevents light leakage. This consolidation eliminates the need for separate optical sheet protrusions and simplifies the assembly process, as the bonding member is applied in a single step during assembly rather than requiring multiple separate components to be installed.
Solution Approach 2:
The bonding member is designed with multi-functionality, serving both as an adhesive bonding agent and as a light-blocking element. This universal component replaces the need for separate displacement-prevention protrusions and light-blocking structures, thereby reducing device complexity while maintaining both structural security and optical performance.
3Reliability
If optical sheet protrusions are used to prevent displacement, then the optical sheet is secured, but light leakage occurs and display quality deteriorates
Solution Approach 1:
The bonding member acts as an intermediary that eliminates the need for optical sheet protrusions. By bonding the light guide plate directly to the frame through the convex protrusions and recessed fitted portions, the optical sheet is indirectly secured without requiring its own protrusions. This intermediary bonding approach prevents light leakage that would otherwise occur at the interfaces of optical sheet protrusions while maintaining displacement prevention.
Solution Approach 2:
The patent converts the potential harm of light leakage at protrusion interfaces into a benefit by using the bonding member to create a light-blocking barrier. The bonding member, positioned at the convex protrusions, not only provides mechanical bonding but also blocks light leakage, thereby converting the problematic interface into a beneficial light-blocking structure that improves display quality.
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 light leakage, maintains frame strength, and simplifies assembly by eliminating optical sheet protrusions, ensuring accurate dimensions and preventing display quality deterioration even under impact.
Implementation Method 1
a bonding member for bonding the frame and a portion of the backlight
Implementation Method 2
a light guide body for converting light from the light source into planar light
Implementation Method 3
adhesive tape secures optical sheets to prevent displacement
Data Source
AI summary
According to one embodiment, a light guide plate includes a light guide plate main body disposed with one end side thereof opposed to a light source and convex portions provided on the both lateral portions in positions separate from the both end portions toward the center of the light guide plate main body. A frame includes fitted portions recessed in positions corresponding to the respective convex portions, into which the convex portions are to be fitted. A bonding member bonds the fitted portions and the convex portions fitted into the respective fitted portions and serves as a light-blocking member covering the interior of the fitted portions and the exterior of the convex portions.