LED Blacklighted LCD Panels: How to Identifiy the Model Used for your MacBook

According to a news published by our friends from MacUser.de, LED backlighted LCD panels used in MacBook Unibody might have different quality/rendering levels. Indeed, Apple is currently using 4 suppliers for such panels, most likely to avoid shortage and/or bring prices down by creating internal competition. Nevertheless, all panels are not equals, and have different range of contrast, brightness and view angles.
This is not new, as it has already been pointed out for the MacBook Pro for which 2 sources of LCD panels are being used, with one being also better than the other.
Most users will never see the difference, as it is visible only in certain conditions with both displays being side-by-side. However, if you really want to know which LCD panel is installed in your MacBook, hereafter is the procedure: go to system preferences/ monitor/ color, then open your LCD display profile, and look for the line 13:

In the case of the MacBook Pro used for this capture, the reference of the LCD panel is 9C85, supposed to be better than the 9C84 that is be used for other series of the same notebook models. As Apple is not communicating about the components used in its notebook models, you will not be able to use this info to request a product exchange.