Backlight Reflector Cavity Layout to Eliminate Display Grid Lines
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Solution Overview
Problem
Current display devices in transportation exhibit a noticeable grid structure in their lighting due to the arrangement of light sources, which is perceived as bothersome by observers.
Innovation Solution
A reflector with irregularly configured cavities and walls that break up the regular grid structure, using side-emitting LEDs and optical components to ensure homogeneous lighting without perceivable straight lines, achieved through injection molding or silicone components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a regular grid arrangement of light sources and reflector cavities is used, then the manufacturing and alignment are simplified, but a noticeable grid structure appears in the lighting which is perceived as bothersome
Solution Approach 1:
The patent applies asymmetry by configuring the reflector cavities with irregular shapes and varying sizes, where adjacent cavities have different geometries. This asymmetric design breaks the regular grid pattern that causes visible lines, while still maintaining functional effectiveness for light reflection and distribution.
Solution Approach 2:
The patent implements local quality by giving different regions of the reflector different cavity configurations. Each cavity is locally optimized with specific shape variations, depths, and orientations tailored to its position, which disrupts the uniform grid structure while maintaining appropriate light control in each local area.
2Object-affected harmful factors
If irregular cavity configurations are used to break up the grid structure, then the visibility of grid patterns is reduced, but the manufacturing complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the reflector surface into multiple discrete cavities with irregular configurations. This segmentation approach allows each cavity to be independently shaped to break grid patterns, while the overall structure remains manageable through modular cavity design that can be produced using standard injection molding techniques.
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 provides a display device with improved lighting homogeneity and reduced visibility of grid structures, enhancing user experience by avoiding perceivable grid patterns.
Implementation Method 1
a reflector having a multiplicity of reflectively configured cavities, with walls of the cavities being configured such that a grid structure of the reflector resulting from the arrangement of the cavities is broken up, and a multiplicity of light sources arranged in each case in the cavities
Data Source
AI summary
The present disclosure relates to a display device and to a means of transportation having such a display device. The display device comprises a display panel and a backlight for the display panel. The backlight comprises a reflector having a multiplicity of reflectively configured cavities. In addition, the backlight comprises a multiplicity of light sources arranged in each case in the cavities. Walls of the cavities are configured such that a grid structure of the reflector resulting from the arrangement of the cavities is broken up.