LED Display Linear Shielding Patterns for Windshield Glare
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Solution Overview
Problem
Display devices in vehicles emit light in unintended directions, causing glare and obstructing the driver's view, especially at night when light is reflected on the front glass, and existing solutions like films can lead to misalignment and reduced transmittance.
Innovation Solution
A light emitting display device with light-shielding linear patterns of specific dimensions and orientations on the emission layer, including a recess portion and positioned between transparent organic and inorganic layers, to limit light emission beyond a certain angle, preventing light from being directed towards the driver's eyes or reflected on the front glass.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If light-shielding linear patterns are added to control light direction, then light emission in unintended directions is blocked, but device structure becomes more complex
Solution Approach 1:
The light-shielding function is segmented into multiple linear patterns arranged in specific directions rather than using a single continuous shield. These linear patterns are formed by dividing the shielding function into discrete elements that can be precisely positioned to control light emission angles without requiring complex continuous structures
Solution Approach 2:
The light-shielding linear patterns are positioned specifically on the emission layer at locations where light control is most needed. The patterns have specific dimensions (width of 1-3 μm, height of 20-50 μm) and are arranged in particular orientations to provide localized light direction control rather than uniform shielding across the entire device
2Object-affected harmful factors
If light-shielding patterns are made taller to block light more effectively, then light blocking performance improves, but manufacturing precision requirements increase
Solution Approach 1:
The light-shielding linear patterns have optimized dimensional parameters (width of 1-3 μm, height of 20-50 μm) that provide effective light blocking while remaining within manufacturable precision ranges. The specific height range of 20-50 μm is sufficient to block light at the required angles without demanding extreme manufacturing precision that would be required for much taller structures
3Illumination intensity
If multiple layers (transparent organic and inorganic) are added to maintain high transmittance, then light transmittance improves, but device complexity increases
Solution Approach 1:
The device uses a composite structure with transparent organic layers and transparent inorganic layers that work together to maintain high light transmittance. The organic layers provide flexibility and the inorganic layers provide structural stability and additional transparency, creating a multi-material system that achieves superior optical performance without requiring each individual layer to be overly complex
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
Effectively blocks light emission beyond a certain angle, reducing glare and maintaining high transmittance without misalignment issues, ensuring driver safety and improved visibility during nighttime driving.
Implementation Method 1
a plurality of light-shielding linear patterns positioned on the pixel definition layer and the emission layer and extending in a first direction... the plurality of light-shielding linear patterns may include a viewing angle so that light emitted from the emission layer is not emitted more than an angle with respect to a normal line
Data Source
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AI summary
According to embodiments, a light emitting display device includes a light emitting diode (LED) positioned on a substrate and including an emission layer, a pixel definition layer including an opening corresponding to the emission layer, and a plurality of light-shielding linear patterns positioned on the pixel definition layer and the emission layer and extending in a first direction. The plurality of light-shielding linear patterns include a recess portion of a concave shape.