Resolution query

epitome

This
https://www.theverge.com/2015/10/7/9467611/hp-curved-all-in-one-34-inch-ultra-wide-announced

says "Its resolution is only 3440 by 1440, which is on the low side considering the display's size."

I have a question about that... What do they think the resolution could be?
It is a 21:9 monitor and AFAICS the highest resolution I found for those is 3440 x 1440
I have looked for a 4K equivalent which would be 5160 x 2160 and I can't find one.

forgotmyname

4K is 3840 x 2160
You cannot find a 4K 5160 x 2160 because thats not the 4K resolution, Its like searching for a QVGA monitor thats 1920x1080. You wont because QVGA = 320x240.

The ultrawide is another option to 2 monitors, as long as you use 1600x1200 or 1920x1600 currently or similar. If you have 2 screens that size you may gain a bit more space.

Dont look for 4K when searching. Just ultrawide. Try 3840x1600

epitome

I agree, "4K" is 3840 x 2160 on a 16:9 screen.

The 4K equivalent 21:9 would therefore be wider with the same PPI as the 16:9 screen, which could turn out to be 5160 x 2160 if both the 16:9 4K and the searched for 21:9 had the same pixels on the vertical. If the horizontal was used as the reference, it would be 3840 x 1600. Both would be 4K equivalent.

I only searched for "5160 x 2160" and came up with nothing. I had not thought about using the horizontal as the reference, so now I have a few results for screens 3840 x 1600

Thank you.

forgotmyname

Your thinking is wrong a widescreen 4k which isnt 4k but anyway...

It wont be twice the width with the same height. 4k has how many pixels?

So it would be 5040 pixels wide but because there are just over 8.25 million pixels in 4K you lose the height. So your new height is 1645 pixels.

You dont gain extra pixels by making the screen wider. 4K is 4K with a resolution of 5160x 2160.