Backlight Reflection Sheet Support for LED Board Connector Deformation
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Solution Overview
Problem
Large liquid crystal display devices using multiple LED boards experience uneven brightness due to deformation of the reflection sheet caused by connectors, leading to ununiform light emission.
Innovation Solution
A lighting device design that includes a light source, a light source board, a reflection member, and a support to hold the reflection member away from the mounting surface, preventing deformation and maintaining uniform light reflectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If connectors are mounted on the mounting surface of the LED board, then electrical connection between adjacent LED boards is achieved, but the reflection sheet is lifted and deformed causing uneven brightness
Solution Approach 1:
The reflection sheet is positioned in a different spatial dimension (above the mounting surface) rather than being mounted on the mounting surface itself. This dimensional separation allows the reflection sheet to be held away from the connectors, eliminating deformation while maintaining its light-reflecting function.
Solution Approach 2:
A support structure acts as an intermediary between the mounting surface and the reflection sheet. This support holds the reflection sheet at a distance from the connectors, preventing direct contact and deformation while ensuring the reflection sheet remains in its functional position.
2Area of stationary object
If the reflection sheet is arranged along the mounting surface, then light reflection coverage is maximized, but the sheet deforms due to level differences with connectors
Solution Approach 1:
The reflection sheet is positioned in a different spatial dimension (above the mounting surface) rather than being mounted on the mounting surface itself. This dimensional separation allows the reflection sheet to be held away from the connectors, eliminating deformation while maintaining its light-reflecting function.
Solution Approach 2:
A support structure acts as an intermediary between the mounting surface and the reflection sheet. This support holds the reflection sheet at a distance from the connectors, preventing direct contact and deformation while ensuring the reflection sheet remains in its functional position.
3Area of stationary object
If multiple LED boards are connected in series to increase display size, then larger display area is achieved, but connector-induced deformation of reflection sheet causes uneven brightness
Solution Approach 1:
The reflection sheet is positioned in a different spatial dimension (above the mounting surface) rather than being mounted on the mounting surface itself. This dimensional separation allows the reflection sheet to be held away from the connectors, eliminating deformation while maintaining its light-reflecting function.
Solution Approach 2:
A support structure acts as an intermediary between the mounting surface and the reflection sheet. This support holds the reflection sheet at a distance from the connectors, preventing direct contact and deformation while ensuring the reflection sheet remains in its functional position.
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 reduces the likelihood of ununiformity in light rays reflected by the reflection member, resulting in consistent brightness and reduced manufacturing costs through single-sided mounting boards.
Implementation Method 1
a reflection member configured to reflect light
Data Source
AI summary
A backlight unit 12 according to the present invention includes an LED 17, an LED board 18, a connector 25, a chassis-side reflection sheet 22, and a support 26. The LED 17 is a light source. The LED 17 is mounted on the LED board 18. The connector 25 is a mounted component mounted on a mounting surface 18a of the LED board 18 on which the LED 17 is mounted. The chassis-side reflection sheet 22 is a reflection sheet 21 configured to reflect light and arranged on a side on which the mounting surface 18a is arranged. The mounting surface 18a is the surface on which the LED 17 and the connector 25 are mounted. The support 26 holds the chassis-side reflection sheet 22 away from the mounting surface 18a of the LED board 18.