Translucent Display Device for Rail Vehicle Doors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Passenger information in rail vehicles is not conveniently displayed where it is most needed, as existing displays on ceilings inside the vehicles do not provide optimal visibility, especially at entry and exit points.
Innovation Solution
A translucent display device is integrated into or applied to the doors and windows of rail vehicles, allowing for the display of visual information on both the inside and outside, with the ability to cover a larger area than traditional ceiling-mounted monitors, using flexible displays that can be applied to curved surfaces and featuring a separating layer for one-way visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a display device is integrated into doors or windows, then passenger information is displayed at the most needed location with larger area, but the device complexity increases due to integration requirements
Solution Approach 1:
The display device is merged with the door or window structure, integrating multiple functions into a single component. The display is applied directly to the outer surface of the door or window, eliminating the need for separate mounting structures and reducing overall system complexity despite the increased display area.
Solution Approach 2:
The door or window serves multiple functions: it provides structural containment, allows light transmission when needed, and displays passenger information. This multi-functionality reduces the need for additional dedicated components, offsetting the complexity of integrating the display function.
2Illumination intensity
If a translucent display device is used, then light can pass through when not in use preserving the view, but the visibility of displayed information is reduced
Solution Approach 1:
The display device dynamically changes its optical properties based on operational state. When displaying information, it becomes opaque for maximum visibility. When not in use, it returns to a translucent state allowing light transmission and preserving the view through the window or door.
Solution Approach 2:
The optical parameters of the display device are changed based on operational requirements. The material properties transition between translucent and opaque states, optimizing both light transmission when idle and information visibility when active.
3Adaptability or versatility
If information is displayed on both inside and outside of the door, then passenger information is available to all passengers, but the device complexity increases with dual-sided displays
Solution Approach 1:
A single display device is integrated into the door structure in such a way that it can be viewed from both the inside and outside of the vehicle. This unified approach eliminates the need for separate display units for each side, reducing complexity while maintaining information accessibility for all passengers.
Data Source
AI summary
The invention relates to a rail vehicle (1) comprising a side section, a door (2) with at least one door leaf (3), a side wall (20), and a window (4), and at least one translucent display device (5, 10) configured to display changeable visual information, wherein the display device is arranged in the side section of the rail vehicle. The invention further relates to a method for optically signaling passenger information on a door (2), on a window (4), or in a side wall of a rail vehicle (1).