Truncated Cone Lighting Apparatus Glare Control
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Solution Overview
Problem
In existing downlight systems with a reflector and cone, a significant portion of reflected light is not utilized for lighting purposes due to inefficiencies, leading to reduced efficiency and glare issues.
Innovation Solution
A lighting apparatus featuring a reflector with a surface of revolution and a truncated conical cone positioned outside the optical paths of controlled reflection light, with a planar light-emitting surface disposed between specific reference lines to minimize glare and maximize light emission, includes a light-shielding member to control direct light and reduce spread reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a substantially cylindrical structure is disposed at a lower portion of the reflector, then the light transmission opening diameter is reduced, but the controlled reflection light efficiency is reduced because light hits the cylindrical structure
Solution Approach 1:
The patent removes the substantially cylindrical structure that was previously disposed at the lower portion of the reflector. By extracting this obstructing element, the light transmission opening can maintain a smaller diameter for aesthetic purposes while allowing controlled reflection light to pass through without hitting any structural obstacles, thus resolving the contradiction between opening size and light efficiency
Solution Approach 2:
The cone is repositioned from being inside the optical path to being disposed outside the optical path of controlled reflection light. This spatial rearrangement in a different dimensional configuration allows the cone to serve its aesthetic and glare-control functions without interfering with the optical path, maintaining both small opening diameter and high light efficiency
2Area of stationary object
If the cone is disposed inside the optical path of controlled reflection light, then the light transmission opening can be smaller, but glare is increased due to light hitting the cone
Solution Approach 1:
The cone is extracted from the optical path of controlled reflection light and repositioned to be disposed outside this path. This removal from the harmful light path eliminates the glare problem caused by light hitting the cone, while the cone remains in place to provide aesthetic value and control other types of light distribution
Solution Approach 2:
The patent introduces a light shielding member as an intermediary element between the reflector and the cone. This mediator blocks direct light from reaching the cone while allowing controlled reflection light to pass through to the light transmission opening, thus preventing glare without compromising the aesthetic function of the cone
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
This configuration enhances light efficiency by preventing reflection light from hitting the cone, reducing glare, and increasing the glare cut-off angle, while maintaining direct light output without unnecessary reduction.
Implementation Method 1
a reflector having a first reflection surface with a shape of a surface of revolution, and having a downward light emission outlet through which direct light from the light source and reflection light from the first reflection surface being emitted
Implementation Method 2
a cone having a substantially truncated conical second reflection surface, an upper opening opposing the light emission outlet, and a lower opening having a larger diameter than the upper opening
Data Source
AI summary
An illumination apparatus includes: a reflector having a first reflection surface with a shape of a surface of revolution, and a downward light emission outlet through which direct light from a light source and reflection light from the first reflection surface being emitted; and a cone having a substantially truncated conical second reflection surface, an upper opening opposing the light emission outlet, and a lower opening having a larger diameter than the upper opening. The cone is positioned outside the optical paths of the controlled reflection light from the first reflection surface.