Position-Aware Smart Mirror Lighting for Reduced Shadowing
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Solution Overview
Problem
Existing mirrors, both reflective and virtual, face challenges in providing semantic information to users during personal care activities without interfering with the evenness of lighting, leading to shadowing and color casting effects on the user's image.
Innovation Solution
An apparatus with a display surface and a light emitting portion that uses sensors to measure the user's position relative to the light emitting portion, allowing a control unit to adjust the light's brightness, color, and emission angle to minimize shadowing and color casting effects, ensuring even lighting and clear image visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a light emitting portion is used to convey semantic information to the user, then information delivery is improved, but shadowing and color casting effects on the user's image worsen
Solution Approach 1:
The control unit dynamically adjusts lighting parameters (brightness, color temperature, emission angle) based on sensor-detected user position and orientation. When the user is closer to the light source, brightness is reduced and emission angle is narrowed to minimize shadows. When farther away, brightness increases and angle widens to maintain information visibility. This real-time parameter adaptation resolves the contradiction between effective communication and image quality.
Solution Approach 2:
The lighting system transitions from static to dynamic operation, with the control unit continuously modifying light emission characteristics in response to user movement. The system adapts emission intensity, spectral composition, and spatial distribution based on real-time positional data, enabling the same light source to serve dual functions of information delivery and even illumination without fixed compromise.
2Loss of information
If the light emitting portion is positioned to convey semantic information clearly, then information visibility is improved, but evenness of lighting on the user's face worsens
Solution Approach 1:
The system employs multiple light emitting portions with different functions: some positioned for optimal information visibility, others for even face illumination. The control unit selectively activates and adjusts each portion based on user position, allowing different spatial zones to serve different purposes simultaneously. This local differentiation resolves the contradiction by distributing lighting functions across multiple sources rather than relying on a single compromised position.
3Loss of information
If the brightness of the light is increased to improve semantic information visibility, then information delivery is improved, but shadowing effects on the user's image worsen
Solution Approach 1:
The system adds the dimension of temporal dynamics to lighting control, adjusting brightness not as a fixed value but as a time-varying parameter responsive to user position. By introducing real-time adaptation across the time dimension, the system achieves high information visibility when needed while minimizing shadows when the user is in vulnerable positions, resolving the static contradiction through dynamic balancing.
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 effectively conveys semantic information to users while maintaining optimal lighting conditions, reducing shadowing and color casting, thus enhancing the usability and clarity of the image presented in mirrors.
Implementation Method 1
a light emitting portion for using light to convey semantic information to the user
Implementation Method 2
a sensor for measuring the position of the user relative to the light emitting portion
Implementation Method 3
allowing a control unit to adjust the light's brightness, color, and emission angle to minimize shadowing and color casting effects
Data Source
Figure 1
Figure 2(a)~2(d)
Figure 3
AI summary
According to an aspect, there is provided an apparatus (100) comprising a display surface (102) for presenting an image of a user; a light emitting portion (104) for using light to convey semantic information to the user; a sensor (108) for measuring the position of the user relative to the light emitting portion (104); and a control unit (106) configured to control the light emitting portion (104) based on the measured position of the user relative to the light emitting portion (104) so as to minimise the effect of the light conveying the semantic information provided by the light emitting portion (104) on the presented image of the user.