Re: screen curtains

Laurie Mehta

I'm not sure if this is relevant to a pc screen but on an iPhone, if screen curtain is on, there is still a slight glow to the phone's screen even though the effect is a blackened screen. You can check this (if you have some sight) by putting screen curtain on the phone while in a totally dark room.

I use a MacBook-Air with BootCamp to use Windows. This laptop has a feature that allows one to adjust the keyboard brightness as well as adjust the screen brightness. I work with keyboard backlighting and screen lighting turned down to zero and I find that the laptop battery lasts much longer that way than it does if either the keyboard or screen is lighted.

I do not know if regular laptops have a button for adjusting screen and keyboard brightness.

On Tue, 2/12/19, Brian Vogel <> wrote:

Subject: Re: [nvda] screen curtains
Date: Tuesday, February 12, 2019, 5:36 PM

On Tue, Feb 12, 2019 at
08:26 PM, Quentin Christensen wrote:

The way screen curtain (in any AT) works
presently, is that it overrides whatever gets sent to the
screen with black pixels. 
This is in direct contravention to my own anecdotal
observations with every smartphone and tablet user who has
screen curtains turned on.

And I've been around a lot of them.  It is
possible to drive the touch part of a touch-enabled device
with all the rest of the screen powered off, and since there
is no backlighting or other illumination of any sort present
when screen curtain is on in Android or iOS I very much
doubt the screen itself is on and being written over.

Brian - Windows 10 Home, 64-Bit, Version 1809, Build
A great deal of intelligence can be
invested in ignorance when the need for illusion is
          ~ Saul
Bellow, To Jerusalem and Back

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