- Status Closed
- Percent Complete
- Task Type Bugs
- Category LCD
- Assigned To No-one
- Operating System Iriver H300 series
- Severity Very Low
- Priority High
- Reported Version
- Due in Version Version 3.0
-
Due Date
Undecided
- Votes
- Private
FS#4764 - H300 reverse colours flash when turning backlight on
When using a reverese colour scheme such as white on black backround, there is a noticable flash when on turning on the display. This may be because the backlight is turned on before screen is written.
Could the backlight be turned on after drawing the screen? May also be good for other backlit targets.
wehn.
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Is this still a problem in the latest daily builds?
Yes.
I downloaded the 19/3/06 build and made a little video. Constant aperture to prevent emphasising it.
Playing it in slow motion [mplayer -speed 0.1 mvi_4897.avi] seems to show this:
black
bright (ie high black level) frame with WPS
normal WPS
The one frame that is brighter but has the WPS drawn already. I hadn’t tried this on the old builds. Hmm. We may need a faster camera (>15 fps!) to figure out what causes the flash.
It almost seems like it is the delay in the LCD fully darkening after the backlight comes on, even if the LCD is drawn first.
Hmm..
Have you seen this? Only really noticable in the dark, I don’t know if it bothers anyone else. :)
I can confirm this on todays build. When turning the backlight on there is a breif white flash before the black background is drawn.
There may need to be a slight delay between drawing screen, and turning on the backlight to fix this. I suspect the “time to darken” would be different other platforms too.
confirmed - only when using dark backgrounds…