Multi-Transmittance Cover Body for Optically Isolated Display Areas
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Solution Overview
Problem
Display devices in motor vehicles face challenges in managing multiple display areas with varying optical requirements on a common cover body, particularly in masking non-essential information to avoid driver overload, which complicates the structure and affects optical properties.
Innovation Solution
A display device with a cover body formed by integrally bonded, translucent to transparent components differing in light transmittance, featuring an opaque masking layer, a translucent obfuscation layer, and a frame to prevent crosstalk, produced using a two-component injection molding method, allowing for distinct display areas with different optical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multicoating is applied on the back face of the cover body to achieve optical insulation of display areas, then the optical requirements of different display areas are met, but the structure becomes more complicated and the fastening of the cover body adversely affects the optical properties
Solution Approach 1:
The cover body is divided into multiple components (first cover body component and second cover body component) with different light transmittance properties. This segmentation allows each component to be optimized independently for its specific optical requirements, achieving optical insulation without requiring complex multicoating structures on the back face.
Solution Approach 2:
Different regions of the cover body are assigned different optical properties through the use of components with varying light transmittance. The first cover body component has lower light transmittance for optical insulation, while the second has higher light transmittance for better visibility, allowing each local area to have the quality needed for its specific display area function.
2Adaptability or versatility
If multiple display areas with different optical requirements are arranged on a common cover body, then various switching functionalities are visualized, but the optical insulation between areas becomes challenging and complicates the design
Solution Approach 1:
The common cover body is segmented into multiple components, each responsible for specific display areas with different optical requirements. This allows independent optimization of each component's optical properties while maintaining a unified overall structure, simplifying the optical design process.
Solution Approach 2:
The cover body uses composite construction with multiple components having different light transmittance properties. This composite approach enables the simultaneous achievement of diverse optical characteristics (different transmittance levels) within a single cover body structure, facilitating versatile display functionality without complex optical insulation design.
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 simplifies production while maintaining optical appeal and preventing unwanted light irradiation between display areas, enabling effective backlighting and sporadic information display without overloading the driver.
Implementation Method 1
the cover body is produced as a formed body in a common forming tool by way of a two-component injection moulding method
Implementation Method 2
an opaque masking layer which is applied to the surface of the cover body facing the observer and which, in the portion of the surface formed by the less light transmissive cover body component, delimits a first display area to be backlit
Implementation Method 3
a plurality of light sources arranged on the side of the cover body facing away from the observer and serving to backlight the first display area or second display area
Data Source
AI summary
A display device including a cover body with a surface facing an observer and a back face facing away from the observer, the cover body has at least two translucent to transparent cover body components which each form a portion of the surface and a portion of the back face; at least one opaque masking layer on the surface facing the observer and which the portion of the surface of the less light transmissive cover body component delimits a first display area to be backlit and the portion of the surface of the more light transmissive cover body component delimits a second display area to be backlit; a support having a plurality of light sources arranged on the side of the cover body facing away from the observer to backlight the display areas; and a frame integrally bonded to the cover body to secure the cover body on the support.