Vehicle Window LED Display with Ambient Light Control
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Solution Overview
Problem
Current luminous information devices for vehicles, especially public transport vehicles like taxis, face inefficiencies in displaying and maintaining visibility of messages under varying outdoor light conditions, leading to driver distraction, operational failures, and poor user visibility due to glare and visibility issues.
Innovation Solution
A luminous electronic device using light emitting diodes (LEDs) with control means and a logic control unit that adjusts brightness automatically based on vehicle light status, ensuring message visibility from outside under any light condition, with manual override and low power consumption, securely fixed to the vehicle's window.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional printed signs with external light sources are used, then the vehicle status can be displayed to users, but the driver's attention to driving is reduced and operational failures occur due to vibrations
Solution Approach 1:
The patent replaces mechanical folding panels and physical signs with an electronic display system using LEDs and a control unit. This electronic system eliminates mechanical moving parts that are susceptible to vibration damage, while allowing remote control operation that does not require driver physical interaction with the display mechanism.
Solution Approach 2:
The control unit automatically manages the display operation and can detect vehicle status changes, reducing the need for continuous driver intervention. The system serves itself by automatically adjusting to operational conditions while maintaining reliable display functionality.
2Illumination intensity
If light sources are used to reinforce visibility, then the message can be seen from outside, but glare is produced during the day and the driver is dazzled at night
Solution Approach 1:
The patent employs dynamic brightness control where the LED illumination intensity automatically adjusts based on ambient light conditions and vehicle operational status. The control unit modulates the light output to maintain optimal visibility while preventing excessive brightness that would cause glare to the driver during daytime or nighttime operation.
Solution Approach 2:
The system changes the illumination parameters (brightness, intensity) of the LED light sources based on detected environmental conditions and vehicle status, optimizing visibility while minimizing harmful glare effects on the driver under different lighting scenarios.
3Illumination intensity
If the sign light is illuminated adequately for user visibility, then users can see the status, but the driver is dazzled; if not illuminated, then the driver is not distracted but users cannot visualize the status
Solution Approach 1:
The patent directs the illumination locally toward the exterior where users are located, using strategically positioned LED elements and optical directing elements that focus light outward through the windshield or vehicle surfaces, minimizing light directed toward the driver's position while maintaining adequate visibility for external users.
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 device provides clear and visible information to users without dazzling the driver, maintaining message legibility and reducing operational failures, while adapting brightness to ambient light conditions for improved visibility and safety.
Implementation Method 1
uses a plurality of light emitting diodes which are associated to control means that are able to illuminate and/or display information as wished
Data Source
Figure 1~2
Figure 3A~3C
AI summary
A luminous electronic information device for displaying information on at least one inside condition of a vehicle to persons outside the vehicle in a visible manner under differing conditions of outside ambient light with at least one display for showing the information so that it is visible from outside the vehicle, a luminous element for illuminating the displayed information, electronic control means connected to the luminous element and power connecting means for connecting a power input of the device to a power output of the vehicle, at least one control actuator for activation/deactivation of the luminous elements, fixing means for fixing the device at an inside portion of a window of the vehicle;, the device comprising a first support (1) where a plurality of light emitting diodes (2) emulating the information to be shown is arranged, the light emitting diodes (2) being connected to the control means (3) and designed to emit light in a plurality of brightness modes; a logic control unit (12) comprised in the control means (3) and connected to a switching means (8) for selection of at least two brightness modes , said logic control unit (12) being designed to regulate the brightness mode of the light emitting diodes (2) as a function of said selection made by the switching means (8); a front plate (4) arranged over the first support (1) and over the light emitting diodes (2), through which the displayed information emulated by the light emitting diodes (2) is visible through said window of the vehicle; and a second support (5) holding the first support (1) and said front plate (4).