Backlight Inner Frame Structure for Thin, Thermally Stable Displays
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Solution Overview
Problem
Existing display devices face challenges in accommodating thermal expansion and contraction of backlight units, maintaining a firm coupling structure while reducing optical depth, and improving luminance and optical uniformity.
Innovation Solution
A display device design featuring a frame, substrate with a light source, inner frame, and optical layer, where the inner frame includes a support part and sub-support part with inclined and side surfaces to reflect light, enhancing luminance and optical uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid coupling structure is used to firmly attach the optical layer to the frame, then structural stability is improved, but thermal expansion and contraction of the backlight unit cannot be accommodated
Solution Approach 1:
The coupling structure employs a flexible interface between the inner frame and the optical layer, utilizing elastic deformation of the coupling parts to accommodate thermal expansion and contraction. This allows the structure to maintain firm attachment while adapting to dimensional changes caused by temperature variations.
Solution Approach 2:
The coupling structure is designed to change its physical parameters (such as spacing and attachment force) in response to thermal conditions. During thermal expansion, the coupling parts increase spacing and reduce attachment force, while during contraction, they decrease spacing and increase attachment force, thereby accommodating dimensional changes.
2Length of moving object
If the optical depth is reduced to achieve a thinner display device, then device thickness is improved, but the coupling structure may become less firm
Solution Approach 1:
The coupling structure transitions from a single-point attachment to a multi-point distributed attachment system. By attaching at multiple locations across the inner frame, the cumulative attachment strength compensates for the reduced optical depth, maintaining firm coupling despite the thinner profile.
Solution Approach 2:
The coupling structure is divided into multiple coupling parts distributed across the inner frame, each providing localized attachment. This segmentation allows the total coupling strength to be maintained through distributed forces, even when the overall optical depth is reduced.
3Length of moving object
If the optical layer is placed closer to the light source to reduce optical depth, then device thickness is improved, but luminance and optical uniformity may deteriorate
Solution Approach 1:
The coupling structure acts as an intermediary element between the light source and the optical layer, providing precise positioning and spacing control. This intermediary function ensures optimal distance maintenance that balances thin profile requirements with luminance uniformity, preventing direct contact while maintaining close proximity.
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 accommodates thermal expansion and contraction of backlight units, provides a firm coupling structure, and improves luminance and optical uniformity.
Implementation Method 1
an inclined surface disposed adjacent to a lower surface of the optical layer, the inclined surface reflecting the light, provided by the light source, to the optical layer
Implementation Method 2
a side surface connecting the lower surface and the inclined surface, the side surface reflecting the light provided by the light source
Data Source
AI summary
A display device is provided. The display device includes: a display panel; a frame disposed at a rear of the display panel; a substrate disposed on the frame and having a light source that provides light; an inner frame coupled to the frame and supporting the display panel; and an optical layer disposed between the display panel and the inner frame, the optical layer placed on the inner frame.