Monitor auto brightness change on PC boot. hard to explain..
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vizionblind
- Posts: 20
- Joined: 21 Aug 2014, 11:31
Monitor auto brightness change on PC boot. hard to explain..
Hey all, hard to explain but... I have a BENQ-2411z and have had it for several months. I use blur busters strobe utility and also have blur reduction turned on in the monitor itself. When I turn my PC on an boot in to windows 8, the screen/desktop looks like a nice decent setting but after30 seconds or so, it auto shifts to a duller/lower brightness setting automatically. what could this be?
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Falkentyne
- Posts: 2805
- Joined: 26 Mar 2014, 07:23
Re: Monitor auto brightness change on PC boot. hard to expla
This happens if you have single strobe set to off. I think (this doesn't ALWAYS happen but it often does), if single strobe is set to off, the monitor uses the default settings for strobe duty and strobe phase, if you toggle blur reduction on when its already off (I t think its something around 020 for strobe duty and 100 for strobe phase. If the BRIGHTNESS control is then adjusted, the 'stored' settings for strobe duty and phase are used. (sort of logical, since turning on or off blur reduction adjust the voltage to the LED's AND the brightess control ALSO adjusts the voltage to the led's.
You can get around this by setting single strobe to on. You can also get around this by saving blur reduction on, to a gamer profile.
I prefer having single strobe set to off in the service menu and using the adjustments in the service menu, mainly due to the danger of the 50hz bug (although only Crysis and Crysis 2 seem to force 50hz unless you forcibly remove it from the registry, but *single* strobing doesn't activate properly at 50hz backlight pulse widths, while double strobe does, but the brightness voltage DOES go up as if it was supposed to single strobe, which could be dangerous to the LEDs), because the adjust ments still apply if you have single strobe set to off, but the windows utility forces single strobe on when any adjustment is made (I'm not sure if this is by design or a firmware bug; I think it was originally intended that adjustments and single strobe be linked as enabled, while if single strobe is set to disabled, the "defaults" are used.
If you have blur reduction on in a profile and activate it when it's currently off, it should turn on with the saved strobe/phase settings, since the profiles also reset and toggle the brightness.
You can get around this by setting single strobe to on. You can also get around this by saving blur reduction on, to a gamer profile.
I prefer having single strobe set to off in the service menu and using the adjustments in the service menu, mainly due to the danger of the 50hz bug (although only Crysis and Crysis 2 seem to force 50hz unless you forcibly remove it from the registry, but *single* strobing doesn't activate properly at 50hz backlight pulse widths, while double strobe does, but the brightness voltage DOES go up as if it was supposed to single strobe, which could be dangerous to the LEDs), because the adjust ments still apply if you have single strobe set to off, but the windows utility forces single strobe on when any adjustment is made (I'm not sure if this is by design or a firmware bug; I think it was originally intended that adjustments and single strobe be linked as enabled, while if single strobe is set to disabled, the "defaults" are used.
If you have blur reduction on in a profile and activate it when it's currently off, it should turn on with the saved strobe/phase settings, since the profiles also reset and toggle the brightness.