They look like Hitachi nock offs to me, Who knows what the extra pins are, maybe a backlight? Be brave, use a pair of plyers to twist those tabs on the back flat so you can remove the LCD unit, to see what's under there, they pop right off. Getting one back on in exactly the right spot so it works again might be slightly more tricky, but worse case you lose one unit. If you have something that uses a Hitachi LCD try slapping one of these on to see if it works.