Vehicle Display Substrate Using Total Internal Reflection Shielding
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Solution Overview
Problem
Interactive displays in vehicles face interference issues due to light from the light source reflecting onto the light sensor, which affects the display's functionality.
Innovation Solution
The implementation of a substrate-based display system with a light source and a light sensor, where a first optical medium with a surface at an angle greater than the critical angle for total internal reflection is used to prevent light from the light source from reaching the light sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light source is disposed on the substrate to provide information to the user, then the display functionality is improved, but light from the light source reflects and causes interference at the light sensor
Solution Approach 1:
An optical medium is introduced as an intermediary component between the light source and light sensor. This optical medium includes a surface oriented at an angle greater than the critical angle, which acts as a mediator to reflect light from the light source away from the light sensor path, thereby eliminating direct light interference while allowing the light source to continue providing display information
Solution Approach 2:
The orientation angle of the optical medium's surface is specifically designed to be greater than the critical angle for total internal reflection. By changing this geometric parameter, the system achieves effective light redirection that prevents interference at the sensor while maintaining the light source's display functionality
2Object-affected harmful factors
If the optical medium surface is oriented at an angle greater than the critical angle to prevent light interference, then light reflection control is improved, but the device structure becomes more complex
Solution Approach 1:
The optical medium serves multiple functions simultaneously: it acts as a protective cover for the light source, provides structural support, and functions as a light redirecting element through its specifically oriented surface. By combining these functions into a single component, the design achieves effective light interference prevention without proportionally increasing device complexity
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
This solution effectively reduces or eliminates light interference at the sensor, enhancing the display's performance and user interaction by minimizing unwanted reflections and improving signal clarity.
Implementation Method 1
a first optical medium disposed on the substrate over the light source. The first optical medium includes a surface at an angle that prevents light from the light source from passing through the first optical medium and into the light sensor
Data Source
AI summary
A vehicle includes a window having a display. The display includes a substrate, a light source disposed at a first location of the substrate, a light sensor disposed at a second location of the substrate, and a first optical medium disposed on the substrate over the light source. The first optical medium includes a surface at an angle that prevents light from the light source from passing through the first optical medium and into the light sensor.