And what is the PWM frequency?
The PWM frequency of the IPS235V is 240 Hz. I measured it with a photo-transistor and sound card. The pulse width seems to be a linear function of the brightness:
- brightness=27: 50% PWM
- brightness=64: 75% PWM (see screenshot here - note the waveform is inverted)
- brightness=100: 100% PWM (no flicker)
The above numbers agree with this graph from the PRAD test:
