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Old 12-01-2022, 04:56 PM   #16
Quoth
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Only my Kobo Touch (C version) ever had excessive ghosting.
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Old 12-02-2022, 11:18 AM   #17
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Originally Posted by Aleron Ives View Post
I set my Libra 2 to refresh every 64 pages, because there is no visible ghosting at normal reading distances. I have to put my nose right up to the screen in order to see it.
I have it set to do a full refresh on every page turn. And even that isn't enough as Kobo for some reason does not refresh the page after using the dictionary, which leaves the text unsharp. It's even worse if I have to look up several words on the same page.

It's not the ghosting, just that the text gets slightly unsharp after each page turn. Only a full refresh helps.
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Old 12-02-2022, 11:46 AM   #18
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Originally Posted by kandwo View Post
I have it set to do a full refresh on every page turn. And even that isn't enough as Kobo for some reason does not refresh the page after using the dictionary, which leaves the text unsharp. It's even worse if I have to look up several words on the same page.

It's not the ghosting, just that the text gets slightly unsharp after each page turn. Only a full refresh helps.
Yes, I do the same.
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Old 12-02-2022, 04:14 PM   #19
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Originally Posted by kandwo View Post
Kobo for some reason does not refresh the page after using the dictionary, which leaves the text unsharp.
Using the dictionary forces a full refresh when you turn the page, but since you already refresh after every page turn, it doesn't make any difference in your case. I'm kind of surprised you can tolerate using an e-reader at all if you're that sensitive to text sharpness.
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Old 12-02-2022, 11:44 PM   #20
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Quote:
Originally Posted by Aleron Ives View Post
Using the dictionary forces a full refresh when you turn the page, but since you already refresh after every page turn, it doesn't make any difference in your case. I'm kind of surprised you can tolerate using an e-reader at all if you're that sensitive to text sharpness.
Maybe something is slightly off in kandwo's particular Kobo. Quoth mentions that his Kobo Touch "C" had ghosting issues, but mine never did. It may be the same with kandwo's Kobo (whatever model it is). We know that there are variations in screen quality within specific models.
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Old 12-02-2022, 11:58 PM   #21
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Maybe something is slightly off in kandwo's particular Kobo. Quoth mentions that his Kobo Touch "C" had ghosting issues, but mine never did. It may be the same with kandwo's Kobo (whatever model it is). We know that there are variations in screen quality within specific models.
Kandwo is not talking about ghosting, but about text sharpness. They're different things. Text sharpness decreases slightly with every partial page refresh and is only restored with full refresh. This happens on all eink readers. Most people seem not to notice it, but some do, myself included. That was one reason I couldn't get used to a Nook - you can't have every page do a full refresh on Nooks. It bothered me enough that I didn't like to read on my Nook at all and eventually sold it.
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Old 12-03-2022, 09:55 AM   #22
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Quote:
Originally Posted by Aleron Ives View Post
Using the dictionary forces a full refresh when you turn the page, but since you already refresh after every page turn, it doesn't make any difference in your case. I'm kind of surprised you can tolerate using an e-reader at all if you're that sensitive to text sharpness.
By "using the dictionary" I mean long pressing a word within a book to access the pop up dictionary. I then tap the page outside of the pop up dictionary, it vanishes and... nothing. There is no full screen refresh when the pop up dictionary fades away. This leaves all the text on the page slightly unclear.

You can test this out yourself. If you repeat this process several times you can observe the text getting gradually worse.

Contrast this to pressing in the middle of a page in a book, which summons the upper and lower toolbars. Now tap in the middle again: the toolbars go away and there's a full refresh of the page. This is the behaviour I would like to see also when consulting the pop up dictionary function within a book.

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Originally Posted by Sirtel View Post
Kandwo is not talking about ghosting, but about text sharpness. They're different things. Text sharpness decreases slightly with every partial page refresh and is only restored with full refresh. This happens on all eink readers. Most people seem not to notice it, but some do, myself included. That was one reason I couldn't get used to a Nook - you can't have every page do a full refresh on Nooks. It bothered me enough that I didn't like to read on my Nook at all and eventually sold it.
Exactly!

I wouldn't mind the ghosting if it weren't for this. I actually find it quite cosy, as if I'm reading a paper book and can see some of the letters on the other side of the page shine through. But I can't stand unsharp text.
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Old 12-03-2022, 04:18 PM   #23
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By "using the dictionary" I mean long pressing a word within a book to access the pop up dictionary. I then tap the page outside of the pop up dictionary, it vanishes and... nothing.
Yes, this is the normal behaviour. When you turn the page, it will trigger a full refresh, but since you already force a full refresh for every page turn, it makes no difference to you.

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Originally Posted by kandwo View Post
Contrast this to pressing in the middle of a page in a book, which summons the upper and lower toolbars. Now tap in the middle again: the toolbars go away and there's a full refresh of the page.
I agree that it would make more sense for the dictionary to trigger an immediate full refresh, but that's not how it works. Perhaps Kobo is trying to prevent multiple refreshes on the same page if you have to look up multiple words at a time.
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Old 12-03-2022, 05:30 PM   #24
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Kandwo is not talking about ghosting, but about text sharpness. They're different things. ...
Are you sure yhey are different things? I always thought that fhe blurriness was caused by ghosting (artifacts left from the previous page's words.)
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Old 12-03-2022, 08:04 PM   #25
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When I tap and hold a word to open the dictionary, I notice all the text on the rest of the page has a kind of pulsing effect, like it's being partially redrawn. There shouldn't be any ghosting, since the same letters are being drawn twice. Ghosting is caused by drawing new, different letters on top of old letters, but it's possible that this redraw is causing the decrease in sharpness that kandwo dislikes.
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Old 12-03-2022, 09:57 PM   #26
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This discussion prompted me to check my sttings for full refresh, thanks! In both the Kobo stock reader and KOReader, I have them set at every 6 'pages' which seems to work as a balance between keeping sharpness and sucking battery
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