Pulse Width Modulation (or not)

[Ray Dollars]

Hi All,

I want to try to get to the bottom of this. I’ve seen mentioned a few times on this website that the F7 is fitted with a PWM screen that will cause eye fatigue, headaches etc.

I’ve been using the Teclast F7 for a couple of weeks and I must admit, I’ve had very sore eyes at the end of each day and also some headaches. Compared to my Macbook, which I’m using now to type this where eye fatigue is pretty much a non issue.

So, after reading the comments about PWM I tried a couple of tests to see if my F7 is fitted with a PWM screen. I turned the brightness down to 25% and tried waving a pen in front of the screen to check for light trails. None. Same thing waving my fingers in front of the monitor. I also tried pointing my smartphone camera at the screen to looking for scrolling lines. Again nothing.

So it would appear my F7 (matte screen) does not have pulse width modulation to control screen dimming. Or… perhaps I need to do a more thorough test.

Is there any conclusive way to check which model screen is fitted in my laptop without taking it apart?

[Ray Dollars]

Very keen to hear from other F7 users who spend a long time staring at the screen.

[Chupa]

turn the brightness below 10 (slider) and do your test again.

if you compare both pc next to each other and load the same website with different text size , which one has bigger letters, is brighter and over all more easy to read and pleasant to look at?

try if f.lux can make your display more pleasant.

Need Help?
1981 soldered my first Sinclair computer 1K, tapedeck * 1984 build and sold IBM clones 8Mhz, 512K, 20MB HDD * 2018 messing with ultrabooks

[Ray Dollars]

Quick update… I’ve taken the advice and installed f.lux. I use the ‘reduce eye strain’ level and it seems to have helped.

[Chupa]

you can use the change brightness keys (manual) with f.lux also. Makes the screen darker but leaves the cursor bright – funny.
had to change to a colored cursor

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Need Help?
1981 soldered my first Sinclair computer 1K, tapedeck * 1984 build and sold IBM clones 8Mhz, 512K, 20MB HDD * 2018 messing with ultrabooks

[superedan68]

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[reyr anawe]

Which computer has larger letters, is brighter, and is overall easier to read and more pleasing to look at if you compare them side by side and load the same page with various font sizes?

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[Marry Janes]

When loading the same website into both computers, side by side, at different font sizes, which one has larger letters, is brighter, and is generally easier to read and more appealing to the eye?

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