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Old 03-26-2009, 12:25 PM   #7
Grimulkan
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Join Date: Feb 2009
Device: Q1 (on way out), PRS505, DR1000S (dead :<), TC1100 (10'' perfection!)
I don't really know if the trouble you are having is exceptionally bad, but a small amount of ghosting is expected. Could you post screenshots with ghosting using non-copyrighted images?

I have noticed enough ghosting to bother me while reading comics as well, but I don't know if this is normal for all e-ink displays or a software bug in the DR controller. Theoretically, a "full refresh" (when all "pixels" on the screen are inverted and brought to a new state) should minimize ghosting, but I often find that the traces of the menu I brought up remains even after a refresh. This is why I would love to see a "ghostbuster" button, thant refreshed the screen (multiple times, if necessary) in such a way that no ghosts remain

Quote:
Originally Posted by flowoeB View Post
@Shaggy: yes, i do, but is it normal that it gets worse with longer runningtime and much better after a reset? is it possible that the DR does 'calibrate' the display at startup or some kind of 'erase' it at a higher power level?
Something does happen at startup. I have experienced the issues described in this post, which may be relevant.

From the post:
Quote:
Originally Posted by allovertheglobe View Post
<snip>
Usually a reset (not shutdown/restart) fixes the issue. To me it seems that the display controller switches the table it uses to look up the values of the 16 supported gray tones, or at least something related. I would think that if was eInk-related, it would be more permanent or would take longer to revert than instantly switching back to normal after a reset.
I've also noticed that drawing something deep black and then having something lighter appear in that same spot without a full screen refresh makes the color lighter than it should be (seen when hitting the "shift" key on my updated matchbox keyboard).

Last edited by Grimulkan; 03-26-2009 at 12:28 PM.
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