Light Emission Controller for Gradual Wake-Up Luminance
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Solution Overview
Problem
Conventional illumination apparatuses for waking up users lack an effective mechanism to gradually increase luminance over time, which is essential for waking users comfortably and efficiently.
Innovation Solution
A light emission control device that includes a light emission controller capable of performing normal control and wake-up control, where the wake-up control gradually increases luminance over time, with the maximum luminance exceeding that of normal control, using a combination of light sources with different color temperatures to achieve this.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light emitter emits light with stable luminance and color temperature according to user instructions (normal control), then the user experience is comfortable and predictable, but the luminance is insufficient to effectively wake up a sleeping user
Solution Approach 1:
The light emission control device transitions from static luminance control to dynamic control by implementing a wake-up mode that gradually increases luminance over time. The controller dynamically adjusts the luminance parameter from a lower initial level to a higher final level, enabling the system to adapt to different user needs (sleeping vs. waking) while using the same light emitter hardware.
Solution Approach 2:
The invention changes the luminance parameter from a fixed value determined by user instruction to a time-varying parameter in wake-up mode. The controller modifies the luminance parameter progressively, creating a gradual brightening effect that stimulates the sleeping user without causing sudden shock, thus resolving the contradiction between needing high luminance for waking and maintaining stability for comfort.
2Productivity
If the maximum luminance is increased to effectively wake up the user, then the wake-up effectiveness is improved, but the luminance becomes higher than what the user would normally experience
Solution Approach 1:
The system performs preliminary action by gradually increasing luminance before reaching the maximum level needed for effective wake-up. This progressive approach allows the user's eyes and brain to adapt to increasing light levels, reducing the shock effect of high luminance while still achieving the necessary brightness to wake the user effectively.
Solution Approach 2:
The wake-up function operates periodically with a time-based progression, where luminance increases in stages over a predetermined period. This periodic control pattern allows the system to deliver the full wake-up effect at the end of the period while distributing the luminance exposure over time, reducing the harmful impact of sudden high-intensity light.
Data Source
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AI summary
A light emission control device (40) includes a light emission controller (41) which controls a light emitter (50) and performs normal control and wake-up control, the normal control being control for causing the light emitter (50) to emit light having a color temperature and luminance according to an instruction of a user, the wake-up control being control for causing the light emitter (50) to emit light at increasing luminance over time to wake up the user who is sleeping. The maximum luminance of light emitted by the light emitter (50) in the wake-up control is greater than the maximum luminance of light emitted by the light emitter (50) in the normal control.