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.
In addition, Dell uses the model number to provide relevant help topics and tutorials. Locating the desktop model number can help you troubleshoot, repair and perform general maintenance on Dell computers in your office. Step 1. Browse to the Dell Product Support page (link in Resources).