Backlight Unit Wire-Connected Supports Prevent Lifting
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Solution Overview
Problem
The technical challenge in liquid crystal display (LCD) devices is the lifting of reflective sheets in backlight units, which affects light distribution and image visibility by creating dark portions on the screen due to inadequate support mechanisms.
Innovation Solution
The implementation of a backlight unit design that includes a bottom chassis, a light source, a reflective sheet, an optical sheet, supports, and a wire portion connecting adjacent supports, where the supports have a closed-loop body portion with elasticity to prevent bending and maintain the reflective sheet's position, thereby minimizing lifting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If supports are spaced apart to reduce complexity, then device complexity is reduced, but the reflective sheet may lift creating dark portions on screen
Solution Approach 1:
A wire portion is introduced as an intermediary element to connect adjacent supports. This wire portion prevents the reflective sheet from lifting between the spaced-apart supports while maintaining the simplified support structure. The wire acts as a mediator that provides continuous support across the gaps between supports.
2Ease of manufacture
If supports are made thinner to reduce visibility, then image visibility is improved, but the supports may bend under optical sheet weight
Solution Approach 1:
Adjacent supports are connected by a wire portion to form a combined structural unit. This merging provides mutual reinforcement, allowing thinner individual supports to resist bending forces collectively. The wire connection distributes and shares the load-bearing responsibility among multiple supports.
3Reliability
If supports are positioned closer together to prevent reflective sheet lifting, then reflective sheet stability is improved, but device complexity and thickness increase
Solution Approach 1:
The wire portion serves as a connecting intermediary that enables supports to be spaced further apart while maintaining stability. Instead of increasing support density, the wire mediator provides the necessary structural continuity to prevent reflective sheet lifting across larger gaps between supports.
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 efficiency and image visibility by preventing the lifting of the reflective sheet, ensuring uniform light distribution and reducing the thickness of the support structure, thus minimizing visibility and maintaining image quality.
Implementation Method 1
a wire portion configured to connect the supports adjacent to each other
Implementation Method 2
the supports have a closed-loop body portion with elasticity to prevent bending
Implementation Method 3
a reflective sheet for reflecting light upward is positioned below the optical lens
Data Source
AI summary
A backlight unit according to an example of the present disclosure includes a bottom chassis, a light source disposed on the bottom chassis, a reflective sheet disposed on the bottom chassis, an optical sheet disposed on the light source, supports disposed between the bottom chassis and the optical sheet for supporting the optical sheet and being spaced apart from each other, and a wire portion connecting the supports adjacent to each other.