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How can I reduce brightness extremely without change pixel RGB values of screen?

I want to reduce my screen's brightness extremely (like %100 to %5). I want to satisfy this two issues together:

Issue 1- Screen RGB values shouldn't be changed.

Issue 2- Brightness should be changed between 0-100 percent.

Windows brightness tool satisfies Issue-1, but not Issue-2. (f.lux satisfies also)

I tried some third party programs (Dimmer, Monitor Brightness Reducer) to change brighness between 0-100 percent. They satisfy Issue-2 but not Issue-1.

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  • And what exactly keeps you from just using your monitor's brightness control?
    – Daniel B
    Oct 8, 2015 at 21:59
  • I'm using laptop, not external monitor.
    – Enes F.
    Oct 9, 2015 at 13:21
  • I'm not aware of any notebooks without brightness control.
    – Daniel B
    Oct 9, 2015 at 14:24
  • Yeah, that is my question's answer. You could enlighten me when I asked this question. I searched answer for 5 days and found a solution by myself.
    – Enes F.
    Oct 9, 2015 at 15:41
  • I only saw it yesterday when you answered it. ;) I'm sure there's a "Fn" key combination to control brightness though, no need to dive into obscure menus.
    – Daniel B
    Oct 9, 2015 at 16:29

3 Answers 3

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Just use f.lux - they now have a Windows version as well.

I use it on my Mac since.... well, since I own a mac.

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  • f.lux doesn't reduce brightness extremely (like %100 -> %1). I must satisfy two issues together.
    – Enes F.
    Oct 3, 2015 at 9:31
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Have you tried this? https://superuser.com/a/310399/441379

(tl;dr It's a portable app called DimScreen, downloadable here)

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  • This program doesnt satisfies Issue-1. You can take two different screenshots with different brightness values and compare them.
    – Enes F.
    Oct 3, 2015 at 9:22
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I finally found a solution. There should be an official control panel of your graphic card that you can change the screen's brightness hardwarely. Control Panel -> Menu related with Colors -> Set color values to lowest.

For Intel: Intel Control Panel-> Display -> Color Enhancements -> Brightness, Contrast, ...
Further, set value to lowest in Windows Brightness Tool to reduce more brightness

Example settings for Intel: (Basically, set values to lowest)
Brightness: 0 -> -60
Contrast: 50 -> 40
Gamma: 1.0 -> 0.4
Hue: 0
Saturation: 0 -> -100

And this solution both satisfies:
Issue-1 (Try to take two different screenshots with different settings, Pixels are completely same)
Issue-2 (Can reduce brightness to like %5)

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