Modular Display Backlight Reflectors for Thermal Expansion
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Solution Overview
Problem
As display apparatuses increase in size, the production and manageability of reflectors become difficult, and thermal expansion affects optical performance, leading to issues with homogeneous lighting and structural integrity.
Innovation Solution
A modular reflector design with cavities and modules, using plastic or elastomer materials, allows for thermal expansion compensation and easier production, featuring elastic connections and overlapping elements to prevent stress and deformation, ensuring homogeneous lighting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the reflector size increases to match larger display apparatuses, then the lighting coverage is improved, but the production difficulty and manageability worsen
Solution Approach 1:
The reflector is divided into multiple modular elements that can be independently produced and then assembled together. Each module contains a subset of the cavities and light sources, allowing for easier manufacturing while achieving the required total reflector area through combination of modules.
2Stability of the object's composition
If the reflector is made as a single large piece, then the structural integrity is improved, but the thermal expansion causes deformation and stress
Solution Approach 1:
The reflector is segmented into multiple independent modules that can expand thermally without constraining each other. This prevents the stress and deformation that would occur in a monolithic structure, while the modular assembly maintains overall structural integrity through controlled connections between modules.
Solution Approach 2:
The modular design allows each reflector element to flex and expand independently with thermal changes. The modules are connected in a way that accommodates thermal expansion, preventing stress buildup while maintaining the overall reflector structure.
3Ease of manufacture
If the reflector uses a modular design with multiple elements, then the production ease and thermal expansion management are improved, but the assembly complexity increases
Solution Approach 1:
The reflector is segmented into standardized modular elements with consistent cavity patterns and connection interfaces. This standardization reduces assembly complexity despite the increased number of components, as each module follows the same design framework and can be assembled using similar procedures.
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 modular design facilitates easier production, reduces stress and deformation, and achieves uniform lighting across display panels, enhancing optical performance and structural integrity.
Implementation Method 1
a reflector (30) consisting of a plurality of modules (300) with a plurality of reflectively configured cavities (31)
Implementation Method 2
provision is made between adjacent modules (300) for a possible thermal expansion of the modules (300)
Implementation Method 3
an elastic connecting element of this type prevents any undesired passage of light
Data Source
AI summary
A display apparatus and a means of transportation having such a display apparatus is disclosed. The display apparatus has a display panel and a backlight for the display panel. The backlight has a reflector consisting of a plurality of modules with a plurality of reflectively configured cavities, and a plurality of light sources in each case arranged in the cavities. Provision is made between adjacent modules for a possible thermal expansion of the modules.