I have an old laptop that is 12 years old that maximum brightness is around 130 nits and its the only screen i can use for hours without problems. I suggest that a manufacturer or someone here can develop a screen that is hardware limited to very low brightness 100-150 nits. The limitation needs to be hardware, software wouldnt work, so there will be no pwm. Many here recommend full brightness to eliminate pwm, the problem is that it is to bright with current screens for most persons. I believe this may be the solution for many of us, and hope someone can be able to test this possible solution. edit: sorry about the duplicated post, i deleted the other one by mistake

I get eye strain with pwm, high brightness and when a monitor or tv display a white color, white color have a lot of energy so it is very tiring for the eyes, I always have my windows theme and my firefox theme configured with a dark background with a color like brown and the fonts in light grey color. All my monitors are flicker free with very low nits, in the range of 25 nits at 0 brightness, I control the brightnes of all of them only with the contrast setting and always have them at 0 in the brightness setting, you can check various monitor minimum brightness with reviewers like tech testers in youtube, https://youtu.be/Q97JZgCqe3Y?t=242

If you have brightness issues with LED technology, it may be worth to look into displays that don't use White LED backlights. AMOLED, Quantum Dot, CCFL, anything that does not emit a continuous rainbow spectrum but instead a spectrum with 3 spikes at red, green, and blue, and preferably nothing or little in-between.

Eye Saver is a great free program that enables you to reduce the brightness via software so you can set the hardware brightness at maximum to eliminate pwm (if your display has no pwm at max) and then reduce it via software. It's also good for making colour corrections. For Android "Color Caliberator" let's you do the same things. https://www.eye-saver.net/

Deepdeep It is not the same as having a monitor with led backlight with low brightness nits or low led power, because even with programs like eye saver or Twilight when you are only displaying a color overlay over your screen, your are still getting the full energy power of the leds that is going through the lcd to your retinas, even with a black color, thats why black color look alot better on lcd with low brightness, the higher the brightness it will look more grey because the lcd can not block the light going through, so it is alot more tiring to watch an screen with 300 nits of led power with Twilight than watching one with 25 nits of led brightness or led power.

There are quite a few DC dimming panels, you don't need full brightness.

Abeabe That might be true to some extent and maybe in some instances but I use a few devices with the brightness set to high/max to eliminate pwm and then dimmed with either Eye Saver or Color Calibrator and it works for me. I think the amount of light that gets through depends on the darkness of the overlay and maybe Twilight doesn't dim enough - i havent used it in a while and dont remember its brightness control.

Deepdeep Yes I think programs like Eye Saver helps alot, but it is better to have a device that give us the ability to control the brightness or led power to the level we want, for example If I had to put a monitor or a tv at 600 nits to eliminate the flicker It will burn my eyes no matter what color overlay is displaying. You can test this, put the darkest overlay with Eye Saver and then increase or lower the brightness of your display via hardware, you will see a color change whith the colors becoming lighter and grayer when you increase the brightness of your display, that is the led light energy that is going to your eyes through the lcd screen, because LCD crystals cant fully block the light the led backlighting is emitting, with oled its different because each pixel emmits its own light, its a shame oled flickers too.

The problem is definitely related with the light emission. I know this because spending little time at front of a new display not only causes me eye strain but also a high skin pain. Refresh rate has nothing to do with it. It is related with the backlight type. It happens to me with all new displays (TV, monitors, phones, notebooks and LED bulbs). I can use devices with old kind of backlights 24hs a day without any problem. Specially devices with CCFL or old LED backlights. The only exception I detected is with some big CCFL monitors with more nits (cd per m2) that also cause me problems. The confirmation to it is that with old Samsung LED TV, that was the first device that hurts me, I solve this problem by lowering the backlight option to the minimum. After that I could use it as normal. It seems related with the maximum nits of the backlight that is always on, and with his light spectrum. Lowering the bright doesn't solve the problem, only the backlight. It seems that the dangerous light emitted by the backlight couldn't be completely filtered by the bright or contrast of the LCD that is at front of the light source. Displays with PWM is on at the maximum power of the backlight for a fraction of time, and is a very intense and harmful light. If I put the brightness at 100%, apps like oled saver doesn't solve the problem at all, at least not enough.

Abeabe RobC Say you have a display with no pwm and in case (1) you just reduce the brightness of the backlight down to 10% which = "X" nits, and in case (2) you keep the backlight at 100% and reduce the brightness with an overlay (eg with Eye Saver) to the same X nits, I don't think there will be more light energy reaching the eyes in case (2). If there is more reaction in the second case I think it might be due to something other than just light intensity, like maybe a different spectral distribution at higher LED brightness, or ???

Deepdeep Yes there is a lot of difference beetween 1 and 2, in a complete dark room you can use this video to test your monitor or display https://www.youtube.com/watch?v=z9T97ZBos5Y , it is a very dark video so you dont need an overlay like Eye Saver, the blacks in the video will be a lot better with a monitor brightness at 0 and contrast at 80 than brightness at 100 and contrast at 0, and if you use an ips screen you will see alot more of ips glow in the corners and grey blacks with brightness at 100, that is because the led backlight power is going through the lcd crystals to your eyes, for example I am using an Alienware aw3418dw and it have a minimum brightness of 23 nits, and it is a world of difference for eye confort.

Screens with very low maximum brightness levels: Page 2

Screens with very low maximum brightness levels

Deepdeep

I haven't read the whole article but the pics with the differences in the spectral readings of various devices are interesting. Do you think the light is causing damage to your skin or just pain?

RobC

Deepdeep Yes, I think so. At least it gets dry after short time like if I were at the beach, and with my eyes too. I had an excellent night vision and now, after exposing to harmul displays, I have a foggy vision at dark in the night. Specially just after the exposition.

Here you have another interesting link:

https://glarminy.com/2016/05/06/blue-filter-light-sensitivity/

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