Acer Aspire VX 15 (VX5-591G) uses high-frequency PWM to regulate brightness
Acer Aspire VX 15 (VX5-591G) is an entry-level gaming notebook that features a NVIDIA GeForce GTX 1050 Ti graphics card and a processor from the latest 7th Intel Kaby Lake generation. Aspire VX 15 is equipped with a 15.6-inch IPS panel manufactured by BOE that carries the model number of NV156FHM-N42. It is an overall good display especially for an entry-level gaming notebook and while it uses PWM for regulating the brightness the frequency is quite high.
You can find all of the available configurations here: http://amzn.to/2qgGRzA
The result that our lab equipment show is very interesting. It appears that the display does not use PWM at 0% and at 100% brightness but it uses anywhere in between. At around 140 cd/m2 which we consider as a norm when working, the panel’s brightness is regulated by PWM; however the frequency used is quite high – 21.2 kHz which significantly reduces the harmful impact. To completely eliminate the negative effect you can use our custom-tailored Health-Guard profile.
You can buy our profiles from here: http://laptopmedia.com/review/acer-aspire-vx-15-vx5-591g-review-geforce-gtx-1050-ti-and-ips-screen/#buy-our-display-profiles
You can learn more about the impact of PWM on your health from here.