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Discussion Starter · #1 ·
I have a Panasonic PT60LC13 LCD RPTV and its native resolution is 1280x720. Does that mean it has exactly 1280 x 720 pixels on it?


If I use my Radeon 9200's DVI output to the LCD RPTV, the card can detect that the TV is 1280x720 and set the resolution to 1280x720. However, there is overscan problem, so actually it's not exact 1:1 pixel mapping, right? I noticed that the text is not so clear(if I set it to 800x600 and use TRUE display mode, then I think it's 1:1 pixel mapping and the text is very sharp).


Does this thing matter? Right now I'm using 960x540 with PowerStrip(VGA output), text is not very sharp but video is ok. I think if I can manage to get 1:1 pixel mapping at 1280x720 resolution, both the text and video should be very sharp, right?


I'm trying to setup ZoomPlayer and ffdshow, but I really want to know if the overscan and non-1:1-pixel-mapping thing will affect my PQ or not.
 

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Yes your LCD has 1280x720 pixels, but some of the pixels are projected onto the trim around the screen, not the screen itself. I believe this is to account for the tolerance in the tv manufacturing process.
 

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Discussion Starter · #3 ·
So you are saying that:


1) If I count the pixels on the LCD screen surface, it's going to be less than 1280x720, right?

2) If I use DVI digital input and 1280x720 resolution, I'm actually doing 1:1 pixel mapping but with overscan?
 

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Quote:
Originally posted by hraner
So you are saying that:


1) If I count the pixels on the LCD screen surface, it's going to be less than 1280x720, right?

2) If I use DVI digital input and 1280x720 resolution, I'm actually doing 1:1 pixel mapping but with overscan?
Correct, the actual panel is 1280x720 but the image created on the panel is then projected onto the screen and it's projected beyond the edges of the screeen for a small percentage of overscan. The image on the screen is not 1280x720, the image on the LCD panel is....same for DLP. If you have proper 1:1 pixel mapping you will have overscan.
 
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