Good Grief, another one. Ron Mertens believe the Present Perfect Tense indicates actions completed. Maybe he should be an editor at Venturebeat

we've worked is Present Perfect,  we have worked is Present Perfect, "we've" is a contraction of "We have". "We had worked" is Past Perfect represents an action completed. "We have worked with a company in New York, eMagin, for a while" indicates the action is ongoing.

http://www.oled-info.com/amd-confirms-its-collaboration-oled-microdisplay-maker-emagin