![]() Maybe there's just a lot of variation across different screens for the same models. I'm really confused by the varying assessments of the picture quality of AGS-101 and NDS Lite that I see sometimes. The DS lite and later backlit GBA SP screens don't flicker much because they are smeary blurry pieces of shit, lol _ I don't think the GBA LCD truly only scans 80 of its 160 active vertical lines, but I do know that the LCD data coming out of the GBA is a full progressive scan, the whole 240x160 display size. In this situation, the contrast can become a bit worse, too. When you adjust that balance potentiometer, an effect that looks much like interlacing takes place, as the effects of the misbalance become visible on a per-line basis, and it changes between even and odd lines every frame. Many laptop and desktop LCDs will have every other pixel be the opposite of its neighbor, so the inversion is out of phase in a checkerboard pattern. How LCDs do this varies between manufacturers and models. With that pot, you are looking to balance the 90/-90 swing, such that they are centered around a common zero. Often, LCDs will have an adjustment potentiometer, to center this inversion swing. Without this swing, "ghosting" effects can take place, as the crystal element gets a bias towards a rotation. However, this is a precise task, perfectly inverting the swing of the rotation. The end result for both sides is actually the same, since it's just gating light. On frame 2, though, it'd be from 0 to -90 degrees. So, on frame 1, it'd be a swing from 0 to 90 degrees. To mitigate this, nearly every active-matrix LCD actually inverts the rotation direction every other refresh. However, similar to any object that is repeatedly bent in one direction, it can get a little "stuck" towards a position it has been rotated towards a lot (I think because of capacitance, but the exact reason is beyond my understanding). y_advance/ (this is where I got the video link)Īn LCD pixel element rotates between 0 degrees and 90 degrees, with one side representing full opacity and another full transparency ( which being a property of the polarizer orientation). the_wierd/ "all 32-pin model GBAs have interlacing, regardless if its backlit or not." Sources (not saying these are authoritative or anything): Is this a known thing? There's also mention of a pot that can be adjusted that may mitigate some of that, but I'm not finding much documentation on that. In my own experience, I can say that I've seen at least one instance of a sprite flickering on an AGS-101 screen whereas there is no flickering on the same sprite on a DS Lite. I've not seen any mention of that here or on RetroRGB and it kinda seems like a big deal. And indeed, looking at a slow-mo video, it does seem like it's alternating fields. I see a lot of talk about the AGS-101 having the best GBA screen, but I'm now seeing a few places (sources below) people mentioning that it uses an interlaced screen.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |