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.
Locating the serial number, product number, and model number. The computer model number (1), serial number (2), bar code (3), product number (4), and warranty. information (5) are located on the bottom of the computer. You may need the information when you travel. internationally or when you contact support. Locating the serial number, product number, and model number 3.