Vehicle Interior Lighting Device With Perpendicular LED Array
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Solution Overview
Problem
Existing lighting devices in vehicle interiors, such as those found in passenger compartments, often dazzle passengers due to direct lighting and are complex to manufacture, requiring multiple LEDs and reflectors, which also consume significant space.
Innovation Solution
A lighting device with a row of LEDs emitting light perpendicular to the forward direction, using a single reflector parallel to the LEDs to deflect light through a satin-covered exit opening, ensuring minimal glare and reduced manufacturing complexity by minimizing components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If direct lighting is used to illuminate a wide area, then illumination coverage is improved, but passenger dazzle increases
Solution Approach 1:
A diffusing pane is introduced as an intermediary element between the light source and the passenger compartment. This pane scatters the direct light from LEDs, converting intense direct illumination into diffuse ambient light that covers a wide area without causing passenger dazzle.
Solution Approach 2:
Instead of directing light directly toward passengers to achieve wide coverage, the invention inverts the approach by using a reflector to redirect light toward the diffusing pane, which then distributes light indirectly throughout the compartment, eliminating direct glare while maintaining broad illumination.
2Illumination intensity
If multiple LEDs and reflectors are used to achieve wide illumination, then illumination coverage is improved, but device complexity increases
Solution Approach 1:
Multiple light-emitting diodes are merged into a single integrated light source assembly, and multiple reflectors are replaced by a single reflector structure. This consolidation maintains the wide illumination capability while significantly reducing the number of discrete components and simplifying the overall device complexity.
Solution Approach 2:
The single reflector is designed to serve multiple functions simultaneously: it directs light from multiple LEDs, positions light toward the diffusing pane, and contributes to uniform light distribution. This multi-functionality eliminates the need for separate components for each task, reducing overall device complexity.
3Illumination intensity
If multiple LEDs and reflectors are used to achieve wide illumination, then illumination coverage is improved, but manufacturing complexity increases
Solution Approach 1:
The invention combines multiple LEDs into a single light source module and uses one reflector instead of multiple separate reflectors. This merging reduces the number of parts that need to be manufactured, assembled, and quality-checked, thereby significantly simplifying the manufacturing process and reducing production complexity.
4Illumination intensity
If multiple LEDs and reflectors are used to achieve wide illumination, then illumination coverage is improved, but space requirements increase
Solution Approach 1:
By merging multiple LEDs into a compact light source assembly and replacing multiple reflectors with a single integrated reflector structure, the overall volume occupied by the lighting device is significantly reduced while maintaining the capability to illuminate a wide area of the passenger compartment.
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 provides optimal, glare-free illumination with reduced manufacturing complexity and space requirements, creating a pleasant indirect lighting effect that minimizes passenger dazzle and simplifies construction.
Implementation Method 1
a reflector is provided, the reflector deflects the light of all light-emitting diodes
Implementation Method 2
the light exit opening is covered by an at least partially transparent pane that has a satin surface
Data Source
AI summary
The invention relates to an illumination device (1) for illuminating the inside of a vehicle, especially the passenger compartment, said device comprising a light source (2) emitting light in a forward direction (X) and comprising a plurality of adjacently arranged light-emitting diodes (3). The row of light-emitting diodes (3) is arranged in a direction (Y) extending perpendicularly to the forward direction (X) of the emitted light. The aim of the invention is to ensure optimum illumination with a simple structure. To this end, a reflector (4) is arranged upstream from the light source (2) in the forward direction (X), parallel to the row of light-emitting diodes (3), and deflects the light of all of the light-emitting diodes.