Elastic Support Structure for Optical Sheet in Backlight Units
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Solution Overview
Problem
Existing display devices with backlight units lack an effective elastic support mechanism between the optical sheet and the bottom chassis, which can lead to reduced image visibility and mechanical instability.
Innovation Solution
A backlight unit with an elastic support system that includes a fastening portion, a support portion, and a body portion with a closed loop cross-sectional shape, providing a restoring force to maintain the optical sheet's position and reduce bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid support structure is used to maintain optical sheet position, then structural stability is improved, but image visibility deteriorates due to increased thickness and light blocking
Solution Approach 1:
The patent applies this principle by using a flexible support structure with an elastic body portion that can bend and deform. The support portion has a reduced thickness design that allows it to be flexible rather than rigid, enabling it to provide structural support while minimizing light blocking and maintaining image visibility in display devices.
2Illumination intensity
If the support portion thickness is reduced to improve image visibility, then illumination intensity is improved, but structural stability deteriorates
Solution Approach 1:
The patent applies this principle by changing the physical parameters of the support structure, specifically making the body portion elastic and the support portion thin. This allows the structure to maintain adequate mechanical support while minimizing interference with light transmission, thus improving image visibility without completely compromising structural stability.
3Ease of manufacture
If a traditional rigid support structure is used, then manufacturing simplicity is improved, but device complexity increases due to additional components needed for elasticity and bending capability
Solution Approach 1:
The patent applies this principle by merging multiple functions into a single support structure. The support component integrates both structural support functionality and elastic bending capability in one piece, eliminating the need for separate rigid support components and additional elastic elements, thus reducing overall device complexity while maintaining manufacturing simplicity.
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 elastic support system enhances image visibility by minimizing the thickness of the support portion and providing a restoring force to counteract bending, thus maintaining optimal display performance.
Implementation Method 1
a portion of the optical sheet is at a first position absent a touch of the display device at a first time, and the elastic body portion is configured to compress such that the portion of the optical sheet bends to a second position that is closer to the bottom chassis than at the first position while the display device is touched at a second time
Data Source
AI summary
A backlight unit is provided which includes: a bottom chassis; a light source on the bottom chassis; an optical sheet over the light source; and a support between the bottom chassis and the optical sheet, and configured to support the optical sheet. The support includes: a fastening portion fastened to the bottom chassis, a support portion contacting the optical sheet, and a body portion between the fastening portion and the support portion. The body portion includes: a first portion extending in a first direction; a second portion extending in the first direction and is between the first portion and the fastening portion; and a third portion which connects the first portion and the second portion. The first portion and the second portion are spaced apart from each other.