Display Packaging Layer and Blocking Structure for Windshield Glare
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Solution Overview
Problem
Electronic devices with displays installed in vehicles face the challenge of light emission interfering with the driver's sight due to projection onto the windshield, necessitating effective light blocking solutions.
Innovation Solution
The electronic device incorporates a substrate, electronic components, and a blocking structure with a packaging layer, where the blocking structure's position and refractive index are optimized to control light emission, ensuring that the light emitted is blocked effectively, thereby reducing interference with the driver's sight. This is achieved by positioning the blocking structure adjacent to the electronic components and using a packaging layer with a specific refractive index to manage light shielding, allowing for asymmetric or symmetrical light shielding effects based on the configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a blocking structure is added to block light from the electronic device, then light interference on the windshield is reduced, but the device structure becomes more complex
Solution Approach 1:
The blocking structure is integrated with the packaging layer of the electronic component, merging the light-blocking function with the existing packaging structure. This eliminates the need for a separate blocking component, thereby reducing structural complexity while still achieving the light interference reduction goal.
Solution Approach 2:
The packaging layer serves as an intermediary element that performs both its original protective function and the additional light-blocking function. By positioning the blocking structure within the packaging layer at a specific distance from the substrate, it mediates between the light source and the windshield, reducing light interference without requiring direct modification of the electronic component or substrate.
2Object-affected harmful factors
If the blocking structure is positioned closer to the substrate, then light blocking effectiveness is improved, but the distance constraints become more difficult to satisfy
Solution Approach 1:
The patent specifies precise parameter relationships (H = n×[(P1+W)/tan θ] with 30°≤θ≤60°) that define the optimal positioning of the blocking structure. By establishing these mathematical relationships between the distance H, refractive index n, spaced distance P1, width W, and angle θ, the design transforms complex positioning constraints into manageable parameter specifications that can be satisfied through controlled variation of these variables.
Solution Approach 2:
The design allows for flexible adjustment of multiple parameters (H, P1, W, θ) to achieve the desired light blocking effect. Rather than fixing a single rigid position, the system provides dynamic design space where manufacturers can adjust these parameters based on specific device configurations while maintaining the required optical performance.
3Illumination intensity
If a packaging layer with specific refractive index is used, then light emission control is improved, but the material selection becomes more restricted
Solution Approach 1:
The patent specifies the refractive index n as a key parameter in the positioning formula H = n×[(P1+W)/tan θ]. By incorporating the refractive index directly into the design equation, the patent transforms material selection from a restrictive constraint into a design variable. Different materials with various refractive indices can be used, and the positioning parameters (H, P1, θ) can be adjusted accordingly to maintain optimal light emission control.
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 light interference on the windshield, enhancing driving safety by controlling the light emission range and providing an anti-peeping function, while maintaining the device's functionality and design flexibility.
Implementation Method 1
The packaging layer is disposed on the electronic component and has a refractive index n at a wavelength of 550 nm
Data Source
AI summary
An electronic device includes a substrate, an electronic component, a first blocking structure and a packaging layer. The substrate defines a normal direction perpendicular to a surface of the substrate. The electronic component is disposed on the substrate. The first blocking structure is disposed adjacent to a side of the electronic component. The packaging layer is disposed on the electronic component and has a refractive index n at a wavelength of 550 nm. The electronic component has a width W in a first direction perpendicular to the normal direction. A distance H is between a surface of the first blocking structure away from the substrate and the surface of the substrate in the normal direction. A spaced distance P1 is between the surface of the first blocking structure away from the substrate and the electronic component in the first direction. Following relationship is satisfied:H=n×[(P1+W)/tan θ].