Aircraft Sidewall Paneling with Indirect Lighting and D-Shape Windows
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Solution Overview
Problem
Conventional aircraft interior sidewall panel designs suffer from direct lighting that is disconcerting to passengers, inadequate visibility due to small oval windows, and poor foot area lighting, making it difficult for passengers to move and find luggage.
Innovation Solution
The introduction of a panel assembly with an elongated, D-shaped window and indirect lighting fixtures that direct light away from passengers' eyes, combined with a kick panel for floor lighting, creating a more spacious and safe environment with enhanced visibility and lighting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If direct lighting is used to illuminate the sidewall panel, then the panel is well-lit, but the light source becomes visible to passengers causing discomfort
Solution Approach 1:
The patent applies local quality by creating different lighting zones: the forward-facing indirect lighting fixture illuminates only the rear side margin of the adjacent panel, while the kick panel provides localized illumination at the passenger's feet. This targeted approach ensures adequate panel illumination without creating visible glare sources in the passenger's direct line of sight.
Solution Approach 2:
The patent inverts the conventional downward-washing lighting approach by using forward-facing indirect lighting fixtures that direct light toward the rear of adjacent panels. This reverse directionality allows the panel to be illuminated without the light source being visible to passengers, eliminating the discomfort associated with direct overhead lighting.
2Ease of manufacture
If traditional oval windows are used, then the manufacturing is simple, but the passenger visibility is limited and requires stretching or stooping
Solution Approach 1:
The patent transitions from traditional two-dimensional oval windows to a three-dimensional D-shaped window configuration that extends vertically and horizontally. This dimensional change allows passengers of various heights to view outside comfortably without stretching or stooping, as the window's apex provides an elevated viewing angle while the overall shape maintains manufacturability.
Solution Approach 2:
The patent employs asymmetric D-shaped window geometry rather than symmetric oval shapes. The D-shape with its flat bottom and curved top creates optimal viewing angles for passengers seated at different positions, with the apex positioned to provide enhanced visibility without requiring passengers to adjust their posture excessively.
3Ease of operation
If the window apex is directed rearward and tilted upward, then passenger visibility is enhanced, but the window shape becomes more complex
Solution Approach 1:
The patent segments the window assembly into distinct functional components: the D-shaped opening structure, the separate window lens, the independent shade mechanism, and the integrated lighting fixture. This segmentation allows the complex D-shape with upward-tilted apex to be manufactured and assembled from simpler individual parts, reducing overall manufacturing complexity while maintaining the enhanced viewing geometry.
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 a unique passenger experience with improved visibility, reduced glare, and enhanced safety by allowing passengers to easily navigate and locate luggage, while the D-shaped windows and floor lighting ensure better viewing angles and safety.
Implementation Method 1
a light source, such as an array of light emitting diodes, whose light output color and/or intensity can be selectively varied
Implementation Method 2
a seal that forms a pressure-tight seal of the window lens to the sidewall panel
Data Source
AI summary
An interior sidewall panel assembly for a passenger aircraft includes a generally planar sidewall structural panel having a D-shaped window opening with an apex that is directed rearward and tilted slightly upward relative to the horizontal, a window assembly disposed in the window opening, an indirect lighting module disposed at a forward edge of the D-shaped window assembly and arranged to direct light forwardly such that the light washes onto a rear margin of a structural panel of a next adjacent panel assembly located immediately forward of the light module, and a kick panel disposed at a lower margin of the structural panel that incorporates cabin ventilation or decompression ducts and vents and an accent light adapted to direct light onto a cabin floor of the aircraft.