Thank you, Walter and James. I've appropriately answered the questions after reading valuable inputs provided from both of you.
Regards Sumit On Tue, 4 Jun 2019, 3:00 pm James Cameron, <qu...@laptop.org> wrote: > Thanks for asking. > > A kernel configuration file is used to select colour or grayscale > mode in the driver, and thus the display controller ASIC. This is in > the kernel sources. > > The keyboard shim detects brightness control keys and manages the > backlight power. When the backlight is turned off, the grayscale mode > is enabled. When the backlight is turned on, the grayscale mode is > disabled. This is in the keyboard shim sources. > > On the XO-1.75 and XO-4 models, a reverse biased red LED in the same > SMT package as the green storage LED is used as an ambient light > sensor. The power management daemon (powerd) detects high ambient > light and turns off the backlight and turns on the grayscale mode. > The backlight is turned off to save power, and increase running time > on battery. This is in the powerd sources. > > However, without any change to backlight brightness or mode switching, > full sunlight does appear as greyscale, because the human eye can't > discern the small amount of colour emitted by the backlight compared > to the large amount of white light reflected from the sun. > > On Tue, Jun 04, 2019 at 12:48:38AM +0530, Sumit Srivastava wrote: > > Hi, all! > > > > Here's a query that has been directed at me on the internet, however I > don't > > have any idea about the grayscale implementation of the screen in XO-1. > How > > does it switch from colour to grayscale and on what basis is it decided? > > > > >The original query: > > {"generic Josh number 96" asks > > "Do you know if the display is switching modes with the greyscale thing? > Very > > curious how the screen works"} > > > _______________________________________________ > > Sugar-devel mailing list > > Sugar-devel@lists.sugarlabs.org > > http://lists.sugarlabs.org/listinfo/sugar-devel > > > -- > James Cameron > http://quozl.netrek.org/ > _______________________________________________ > Sugar-devel mailing list > Sugar-devel@lists.sugarlabs.org > http://lists.sugarlabs.org/listinfo/sugar-devel >
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