Vanity Mirror Light Pipe for Even Illumination and Dimming
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Solution Overview
Problem
Conventional vanity mirrors suffer from image distortion due to poor reflective surfaces and harsh light sources, and their light sources are often energy inefficient and difficult to adjust.
Innovation Solution
A mirror assembly with a light pipe surrounding the periphery, featuring light sources positioned near the upper portion that emit light orthogonally to the viewing direction, and a proximity sensor to adjust light levels based on user presence and distance, ensuring even illumination and energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional light sources are used in vanity mirrors, then illumination is provided, but energy efficiency is poor and light distribution is uneven
Solution Approach 1:
The patent introduces a light pipe as an intermediary component between the LED light source and the mirror surface. The light pipe captures light from the LED and distributes it uniformly around the periphery of the mirror through total internal reflection, eliminating the need for multiple harsh light sources while achieving even illumination.
Solution Approach 2:
The patent changes the physical state and distribution parameters of light by using a light pipe with varying cross-sectional area and refractive index gradients. This transforms the point-source light from the LED into a distributed linear light source that provides uniform illumination around the mirror periphery.
2Illumination intensity
If light sources are positioned to provide illumination, then lighting is achieved, but image distortion occurs due to harsh lighting
Solution Approach 1:
The patent applies different optical properties to different regions of the light distribution system. The light pipe has varying refractive indices in different regions to control light scattering and reflection, creating soft, diffused lighting in areas where harsh light would cause distortion while maintaining bright illumination where needed.
3Device complexity
If fixed light sources are used, then simple structure is maintained, but adjustability is poor
Solution Approach 1:
The patent incorporates sensors and control systems that dynamically adjust the lighting parameters based on environmental conditions and user presence. The system can automatically dim, brighten, or change color temperature of the LED sources, providing adaptability while maintaining a relatively simple overall structure through automated control.
4Illumination intensity
If high power light sources are used to ensure sufficient illumination, then lighting intensity is adequate, but energy consumption increases
Solution Approach 1:
The patent replaces traditional high-power incandescent or fluorescent light sources with low-power LED sources combined with optical amplification through light pipes. The light pipe acts as a passive optical amplifier that distributes the light from low-power LEDs over a large area, achieving sufficient illumination without high energy consumption.
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 distortion-free, energy-efficient, and adjustable lighting system that enhances the viewing experience by varying light intensity and distribution according to user proximity, reducing energy consumption and improving image clarity.
Implementation Method 1
a light pipe configured to transmit light from the light source around a periphery of the mirror
Implementation Method 2
The light pipe includes a pattern of light scattering elements that scatter a portion of the light that passes through the light pipe
Data Source
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AI summary
A mirror assembly (2) includes a housing (8), a mirror (4), a light source (30), and a light pipe (10) positioned along a periphery of the mirror (4) and comprising a light scattering region to emit a substantially constant amount of light along the length of the light pipe (10). In some embodiments, the mirror assembly (2) includes a sensor assembly to adjust the amount of emitted light based on the position of a user in relation to the mirror (4). Certain embodiments of the mirror assembly (2) include an algorithm to adjust light based on the position of a user relative to the mirror (4), the level of ambient light, and/or the activation of different light modes.