Elliptical Diffuse Lamp Reducing Glare
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Solution Overview
Problem
Current panel and integrated lamps for office lighting have low luminous efficiency and high glare values, causing visual fatigue due to inadequate light adaptation for human eyes.
Innovation Solution
A lamp design featuring a reflecting cover made of diffuse materials with a curved elliptical surface, a light source assembly, and a reflecting element, where the light source is angled between 130° to 170° relative to the reflecting surface, and a reflective wall positioned between the cover and element to reduce glare by dispersing light uniformly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If side-type or direct-type lighting is used in panel lamps and integrated lamps, then the lighting structure is simple, but the luminous efficiency is low and the glare value is high
Solution Approach 1:
The patent employs a curved reflecting surface with an elliptical cross-section instead of flat surfaces. This curvature enables optimal light reflection angles, directing light away from direct viewer paths to reduce glare while maintaining luminous efficiency. The curved geometry transforms the light distribution pattern without requiring complex multi-component structures.
Solution Approach 2:
The patent optimizes the angle between the light source and reflecting surface, specifying it should be 130° to 170°. This parameter adjustment ensures that reflected light exits within a 120° angle range, controlling glare values below 19 while maintaining high luminous efficiency. The precise angular parameters transform the lighting performance without complicating the overall structure.
2Illumination intensity
If high brightness light is emitted to improve luminous efficiency, then the illumination intensity increases, but the glare value increases causing visual fatigue
Solution Approach 1:
The patent creates different light distribution characteristics in different spatial zones. The reflecting surface is designed to direct light preferentially in specific directions (exiting within 120° angle) while suppressing light in glare-prone directions. This local optimization of light quality in different zones achieves high luminous efficiency without uniform high glare throughout the space.
Solution Approach 2:
The reflecting surface acts as an intermediary between the light source and the environment. Instead of light directly reaching observers (causing glare), the reflecting surface mediates the light path, transforming direct high-glare emission into controlled reflected emission. This intermediary structure enables high luminous efficiency while the reflection geometry controls glare values below 19.
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 design reduces glare values and improves light uniformity, enhancing luminous efficiency and reducing visual fatigue by confining light exiting angles within 120° and maintaining a uniform glare value below 19.
Implementation Method 1
a reflecting cover made of a diffuse reflecting material, the reflecting cover has a light exit opening, an inner surface of the reflecting cover is a reflecting surface
Implementation Method 2
the reflecting surface is a curved surface formed by a translation of an elliptical curve; an angle between a tangent line at an intersection point where a central ray emitted by the light source assembly intersects the reflecting surface and the central ray is 130° to 170°
Implementation Method 3
the reflecting element has a reflective wall parallel to the central ray, the central ray is positioned between the reflecting cover and the reflecting element, part of light emitted by the light source assembly is reflected by the reflective wall onto the reflecting surface
Data Source
AI summary
Disclosed is a lamp. The lamp comprises a reflection hood (110), a light source assembly (120) and a reflection member (130). The reflection hood (110) is made of diffuse reflection material, is a curved face formed by the translation of an elliptic arc, and has a light emitting outlet (114), and an inner surface thereof is a reflection face (112). The light source assembly (120) is fixed to an end of the reflection face (112) and the included angle between a tangent line, at the point of intersection of a central light emitted therefrom and the reflection face (112), and the central light is 130° to 170°. The reflection member (130) is fixed to an end of the reflection face (112) and has a reflection wall (132) parallel to the central light. The central light is located between the reflection hood (110) and the reflection member (130). Some light emitted from the light source assembly (120) is reflected to the reflection face (112) by the reflection wall (132) and emitted from the light outlet (114) after being reflected by the reflection face (112); and other light is reflected by the reflection face (112) and emitted from the light emitting outlet (114).