This has become a common display type for mid-range to high-end phones. OLED/AMOLED. OLED & AMOLED utilizes 'organic' LEDs which emits light and in the majority of cases does away with the need for the back-light of an LCD display resulting in a potentially thinner panel.
1 The model number is located on a small label located on the frame around the computer screen. (e.g., VGN-FW550F)  The computer information and compliance label, located on the bottom of the laptop case, indicates the actual model number.
The easiest way to find your model number is to look for a small label on the frame of your notebook screen or near the hinge between the screen and the keyboard. The label should be the same color as your computer, with contrasting letter colors. You can also look for a white product label on the bottom of your laptop. Sony warns that this label could be placed anywhere on the bottom of your device, so you may have to look closely to find it. Sony warns you not to use the model information found on the grey product label on the bottom of your notebook.