Vehicle LED Display Shielding Patterns for Glare Control
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Solution Overview
Problem
Light emitted from display devices in vehicles can interfere with driver visibility and cause reflections on the front glass at night, leading to potential distractions and safety issues.
Innovation Solution
A light emitting display device with light-shielding linear patterns on the emission layer, including a recessed shape and specific dimensions, is designed to limit the viewing angle of emitted light, preventing it from being directed towards the driver 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 driver visibility is improved and glare is reduced, 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 complex shielding structure. The patterns are divided into first light-shielding linear patterns extending in a first direction and second light-shielding linear patterns extending in a second direction, allowing independent optimization of each set for controlling light in different directions.
Solution Approach 2:
Different regions of the display device have different light-shielding characteristics. The light-shielding linear patterns are positioned specifically on or near the emission layer where light is generated, providing localized light control exactly where needed rather than applying uniform shielding across the entire device structure.
2Ease of manufacture
If traditional film-based light shielding solutions are used, then manufacturing is simpler, but misalignment issues occur and cost is higher
Solution Approach 1:
The light-shielding linear patterns are merged with the emission layer structure, positioned directly on or adjacent to it during the same manufacturing process. This integration eliminates the need for separate film alignment steps, as the patterns are formed as part of the layered structure itself rather than as a separate component requiring precise positioning.
Solution Approach 2:
The light-shielding linear patterns are formed preliminarily during the manufacturing process before final assembly, positioned in predetermined locations relative to the emission layer. This preliminary positioning ensures correct alignment is built into the structure during fabrication rather than requiring complex alignment procedures during assembly or installation.
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 blocks light emission beyond a certain angle, ensuring driver safety by reducing glare and maintaining clear visibility, while also eliminating misalignment issues and reducing manufacturing costs compared to traditional film-based solutions.
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
Implementation Method 2
prevent the display device used in the vehicle from blocking the driver's view as it is reflected on the vehicle's front glass at night
Data Source
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.