Vehicle Display Light Control Structure for Windshield Reflection
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Solution Overview
Problem
Large-angle light emitted by vehicle displays can be reflected by the windshield, causing driver distraction and increasing the risk of driving.
Innovation Solution
A display device with a light control structure that includes a substrate and light shielding structures, where the light control structure is designed to reduce light with greater emitting angles by blocking or absorbing them, thereby minimizing reflection on the windshield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional display device is used in a vehicle, then the display can provide information to the driver, but large-angle light emitted by the display can be reflected by the windshield to the driver's eyes, causing distraction and increasing driving risk
Solution Approach 1:
The substrate surface is divided into multiple inclined planes with different inclination angles. Each inclined plane directs light at different angles, preventing large-angle light from reflecting directly into the driver's eyes while allowing small-angle light to pass through normally. This segmentation of the surface geometry effectively controls light reflection patterns.
Solution Approach 2:
Different regions of the substrate surface have different inclination angles tailored to specific functional requirements. The first inclined plane has a different inclination angle than the second inclined plane, allowing each region to optimize light control for its specific location and function, thereby reducing overall light reflection to the driver.
2Object-affected harmful factors
If the substrate top surface is made with non-parallel parts overlapped with light shielding structures, then light control is improved, but the manufacturing complexity increases
Solution Approach 1:
The substrate surface employs asymmetric inclined planes with different inclination angles rather than symmetric parallel surfaces. This asymmetric design enables differential light control across different regions, optimizing the reduction of light reflection to the driver's eyes while maintaining a manageable structural complexity through the use of only two distinct inclined plane types.
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
Reduces the likelihood of light reflection on the windshield, enhancing driver safety by minimizing distractions from vehicle displays.
Implementation Method 1
the light control structure is designed to reduce light with greater emitting angles by blocking or absorbing them
Data Source
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AI summary
A display device (DD) for a vehicle (VE) with a window (WD) includes a substrate (SB), a light control structure (LS) disposed on the substrate (SB) and a plurality of light emitting units (LU) disposed between the substrate (SB) and the light control structure (LS). In a cross-sectional view, a viewing region (VR) is on the window (WD), a first reference point (RP1) at the window (WD) is out of the viewing region (VR) and corresponding to an upper side (US) of the viewing region (VR), a distance dx1 exists between the first reference point (RP1) and the display device (DD) in a horizontal direction, a distance dz1 exists between the first reference point (RP1) and a center (CE) of the display device (DD) in a vertical direction, the light control structure (LS) has an effective emitting angle θ, and the effective emitting angle θ satisfy the following equation: θ≤arctan(dz1/dx1).