✅ Our Solution: A 40-Minute, Nonlinear, Multi-Phase Wake-Up Model
Sampling rate: 1 data point / 30 seconds
Backed by empirical sleep data, Donut’s color temperature and brightness trajectory is optimized across three adaptive phases to ensure:
Early suppression
Mid-phase acceleration
Glare-free final moments
🌗 Phase A | 0–20 min (Deep Sleep / Pre-warm)
Brightness: ≤ 8% of final value
Color Temp Path: ~5078K → ~1000K
Inflection Point: Color temp "valley" around minute 19
Strategy: Rapid CCT "warm shift" triggers circadian cues without raising brightness too early, minimizing sleep disruption.
🌅 Phase B | 20–32 min (Transition / Dawn)
Brightness: ~8% → ~32%
Color Temp Path: ~1000K → ~2200K
Strategy: Light and color temperature are tightly coupled using a bivariate algorithm. The ascent remains smooth to simulate a “dawn surge” without visual overshoot.
☀️ Phase C | 32–40 min (Awakening / Stabilization)
Brightness: ~32% → 100%
~68% @ 26 min
~92% @ 29 min
Color Temp Path: ~2200K → ~2800–3000K (recommended final value: ~2900K)
Strategy: A final brightness ramp-up is applied, but with a decreasing slope near peak, to eliminate glare and ensure visual comfort.
🎚️ Dynamic Mapping: Synchronizing CCT and Brightness Windows
Empirical Ratios (based on data regression):
Acceleration Phase (20–40 min): ~4–6% brightness gain / +100K CCT
Pre-warm Phase (0–20 min): <1% brightness gain / +100K CCT — this is a CCT-dominant stage
Operational Logic:
First 70% of the cycle is CCT-led, focusing on circadian priming
Final 30% uses brightness surge to solidify wake signals
Peak phase slope gradually decreases to eliminate light shock
✨ Core Design Principle: Perceptible Breathing Effect
Visual Breathing:
Light doesn't simply go from dark to bright — it expands in three organic diffusion stages:
Initial glow: Warm amber mist at ≤1 lux——A warm, mist-like low-luminance orange softly spreads into the darkness
Transitional build-up: Tide-like luminance rise (simulating dawn)——Brightness rises in tidal motion, emulating the pulse of dawn
Final stabilization: Steady-state fill——Light fully occupies the room with a calm, warm presence, easing body and mind into wakefulness
Auditory Breathing:
Our soundscape engine evolves in phase with the lighting curve, delivering multi-modal wake-up through:
Forest birdsong
Ocean waves
City podcasts
Or user-uploaded custom sounds
The system automatically adapts the light rhythm to each audio type, creating a personalized resonance between body and environment.
🌬️ Breathing You Can See, Precision You Can Feel
— Inside the Donut Creation | Ongoing
