Motor Vehicle Lighting Screen With Integrated Photometric Optics
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Solution Overview
Problem
Conventional screen-based automobile signaling devices fail to meet regulatory photometric requirements for minimum light intensities and are limited by rectangular substrate constraints, leading to aesthetic and bulk issues when integrated with other lighting functions.
Innovation Solution
A motor vehicle lighting device with a single optical element that combines microLED light sources for a screen and regulatory photometric functions, where the screen's shape is defined by the arrangement of light sources on a common substrate, and optical patterns are used to achieve required light distributions without increasing bulk or disrupting aesthetics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a screen is added to the lighting device to display information, then the information display function is improved, but the device complexity and size increase due to the need for separate light sources and spacing from other functions
Solution Approach 1:
The patent combines the screen function and regulatory photometric functions into a single lighting device using a common substrate. The optical element is divided into a first zone for the screen and a second zone for regulatory functions, allowing both functions to coexist in one integrated structure without requiring separate light sources or additional spacing.
Solution Approach 2:
The lighting device is designed to perform multiple functions simultaneously: displaying information through the screen in the first zone and performing regulatory photometric functions (brake light, position light, direction indicator) through the second zone, all within a single device structure that serves universal purposes.
2Adaptability or versatility
If a screen is added to the lighting device to display information, then the information display function is improved, but the device size increases due to the need for spacing between the screen and other functions
Solution Approach 1:
The patent merges the screen and regulatory functions into a single integrated optical element on a common substrate, eliminating the need for additional spacing between separate components. The first zone and second zone share the same substrate and housing, reducing the overall device volume.
3Ease of manufacture
If conventional light sources are used for the screen, then the screen can be produced, but the regulatory photometric functions cannot be achieved due to insufficient light intensity
Solution Approach 1:
The optical element is segmented into two distinct zones: the first zone receives light from the first plurality of light sources to form the screen, and the second zone receives light from the second plurality of light sources to perform regulatory photometric functions. This segmentation allows each zone to be optimized for its specific function, with the second zone using higher intensity light sources to meet regulatory requirements.
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 enables the achievement of regulatory photometric functions while maintaining a compact, aesthetically seamless design by closely arranging microLEDs on a common substrate and using optical patterns to enhance light distribution, ensuring compliance with minimum light intensity standards.
Implementation Method 1
an optical element arranged opposite the common substrate at a distance so as to receive light emitted by the light sources
Data Source
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AI summary
Lighting device (1) for a motor vehicle, comprising a first plurality (41) of selectively activatable light sources, and a second plurality (42, 43, 44) of light sources, the first and second pluralities of light sources being arranged on a common substrate (4) and each light source of the first plurality being positioned at a distance from the other light sources of the first plurality of less than 1 mm, characterized in that the lighting device comprises an optical element (5) having a first region (51) positioned facing the first plurality of light sources and a second region (52, 53, 54) positioned facing the second plurality of light sources, the second region being provided with optical patterns (62, 63, 64).