Onyx Boox Page PWM Measurement
The Onyx Boox Page is a 7-inch e-reader with a true DC-dimmed e-Ink Carta display that exhibits no PWM at any brightness level. It features the most even graph of any Onyx product I've measured so far.
Visually measured by camera at 1/6400 shutter speed. Opple Light Master IV used for graph measurements.