Just seen this as I was heading to window-shop a CQ-61, but having experienced HDMI problems in the past i'll try and give you a quick reply.
Your laptop has a HD Media Interface socket, which is, if you check your laptop specs, almost certainly an Output Interface.
Your PS3, is also an Output Interface. Your Laptops HDMI port needs to be an input for it to recieve a signal, and i'm afraid that would require expert knowledge of HDMI circuitry and a solder iron for that idea to become a reality, which is of course after you dissassemble your laptop and void any kind of warranty.
What would I do?
Just get a TV, doesn't have to be "Full HD" , as i've found that HD ready TVs can display a 1080p signal using a PS2/3 component cable