Epson TW10 (Home 10)

[Rik Wang]

I'm afraid Epson's response is just a different way of phrasing what's in the user manual to begin with.

If you are up for it, the way to proceed is tedious, but should produce results: you begin with an *active* resolution of 640x480 that looks good, with a *total* of 848x525. Then you increase the vertical *total* one pixel at a time, and increase the horizontal 8 pixels at a time - always leaving the active at 640x480. At some point - the magic number - 640x480 will be mapped one-to-one on screen, with so many pixels border vertically and horizontally. As long as 640x480 is "stretched" you can assume the scaler is detecting a non-native signal and doing its job.

[intinig]

Rik 640x480 is already mapped 1:1. Basically it uses all the vertical resolution and 640 of the 854 horizontal pixels.

Increasing a pixel at time I should aim for a stretched 640x480?

[Rik Wang]

Then what you want to do is post the timing for the perfect 640x480 that's mapped 1:1. You use those totals, and add to the active pixels from the borders...

Post the timing and I'll give you an example.

[intinig]

This is it

640x480@75Hz=640,59,96,53,480,48,2,11,34408,278

[intinig]

Meanwhile I've experimented a bit. I took a 640x480 res that displayed 1:1 and had enough front/back porch and started subtracting from the porches and adding to active.

The best result I could achieve was an 848x480 that got displayed as an overscanned 640x480. I couldn't find a way to make it use all the 854 pixels.

The only setting I have in the projector is Aspect Ratio, with three values: Normal Squeeze Zoom. When you have a native 16:9 signal you use
Squeeze, that uses the whole lcd matrix.

The problem is that I couldn't yet find a way to get a 480p resolution with more than 640 horizontal active pixels. This last experiment gave me an 848x480 cropped to 640x480 (overscanned?).

One last question: can the type of display recognized by windows influence this behaviour? The TW10 is recognized as an Unknown Plug And Play.

Thank you,
intinig

[Rik Wang]

Windows does not control the display when PowerStrip is runnning - PowerStrip does.

Set the project to "Normal"(!!!) and try this resolution:

720x480=720,19,96,13,480,48,2,11,34408,7

If 640x480p is NOT scaled and this is, the projector is only capable of 640x480 max.

[intinig]

In Normal mode the 720x480 res gets displayed with a 1:1 mapping but the image is cropped (not scaled!) to 640x480. There are 40 pixel per side chopped off

I hope this is a good thing.

If I put the projector to Squeeze, I get the same image scaled to 854x480.

[Rik Wang]

No I'm afraid that is not a good thing - it means the projector is only able to display 640x480 active pixels - anything more is scaled internally.

[intinig]

Holy s**t

Well, thanks for all the time you lost with me