Glass Bottom Cover LED Backlight Thermal Warping
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Solution Overview
Problem
Conventional display devices face issues with increased thickness and bezel size due to cover bottoms made of metal or plastic resin, leading to unsatisfactory appearance and reduced screen immersion, and are prone to warping or breaking due to heat generated from the backlight unit.
Innovation Solution
A display device design featuring a glass material for the bottom cover and a divided LED housing to mitigate thermal expansion, reducing the thickness and bezel size while enhancing structural rigidity and preventing warping or breakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a cover bottom made of metal or plastic resin is used, then structural support is provided, but the thickness and bezel size increase
Solution Approach 1:
The patent changes the material parameter from conventional metal or plastic resin to glass material, which provides high structural support with thinner dimensions. This material substitution resolves the contradiction by achieving both strength and reduced thickness through the inherent properties of glass.
Solution Approach 2:
The patent employs a composite structure combining glass material for the cover bottom with a reflective layer. This composite approach provides structural support while maintaining thin profile, as the glass layer can be made thinner when combined with the reflective functionality, addressing both strength and dimension requirements.
2Strength
If a conventional cover bottom is used, then structural support is provided, but warping or breaking occurs due to heat from backlight unit
Solution Approach 1:
The patent changes the material parameter from metal or plastic resin to glass material, which has superior thermal stability and resistance to warping and breaking under heat conditions. This resolves the contradiction by selecting a material with both structural support capability and thermal reliability.
Solution Approach 2:
The patent uses a thin glass cover bottom that can be replaced if damaged, rather than designing for indefinite durability. This approach accepts that the cover bottom may have limited service life under thermal stress, but provides adequate structural support during its operational lifetime.
3Length of stationary object
If glass material is used for bottom cover, then thickness and bezel size are reduced, but manufacturing complexity increases
Solution Approach 1:
The patent segments the cover bottom into a separate glass component that can be manufactured independently and then assembled to the display device. This segmentation allows specialized glass manufacturing processes to be used while keeping the overall device assembly manageable, resolving the contradiction between reduced thickness and manufacturing complexity.
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 effectively reduces the thickness and bezel size, enhances consumer satisfaction, and prevents display device deformation and breakage caused by thermal expansion, thereby improving marketability and screen immersion.
Implementation Method 1
prone to warping or breaking due to heat generated from the backlight unit
Implementation Method 2
a divided LED housing to mitigate thermal expansion
Data Source
Figure 1
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AI summary
A display device includes a display panel (200), a light guide plate (203) at the rear side of the display panel (200); a reflector (205) on the rear surface of the light guide plate (203); a bottom cover (230) made of a glass material (which acts as a cover for the light guide plate 203) on the rear surface of the reflector (205); and a light-emitting diode housing (220) on one part of which an LED is mounted so as to supply light to one end of the light guide plate (203), another part of the LED housing (220) being coupled to the rear surface of the bottom cover (230) at one of its ends. This arrangement makes it possible to reduce the thickness of the display device and the size of its bezel, and to prevent the display device from being warped or broken due to thermal expansion.