how do i connect a led cinema display 27" to notebook with hdmi port

<http://www.kanexlive.com/xd>

but you will get only 1280 x 720.

And how i can use such display in full resolution?
Want to connect 27" to my PC(AMD Radeon 290) - has only hdmi and display ports....

You will get full resolution connecting to a DisplayPort with a Mini DisplayPort to DisplayPort adapter.

<http://www.newegg.com/Product/Product.aspx?Item=N82E16812200691>

This is the way we did it:

Get this 5 inch Mini Displayport Female to Displayport Female Coupler:

http://estore.circuitassembly.com/products/5-inch-mini-displayport-female-to-dis playport-female-coupler.html#

Then get a DisplayPort to HDMI cable

http://www.startech.com/Cables/Audio-Video/DisplayPort/DisplayPort-to-HDMI-Cable -Male-to-Male~DP2HDMI2MM6

This combination will enable you to connect your CinemaDisplay (mini-display port) to your HDMI input on your laptop or PC

will it get 1920 x 1080 resolution Jossi ? i am planning to get it

This should solve your problem. Link to product is in description of video

https://www.youtube.com/watch?v=iMgFwoCoXwI