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.
Option 2: Use System Information or HP Support Assistant. Use the following steps find your model number using HP utilities. If your computer does not start into Windows, use Option 1: Use the product label . In Windows, press the fn + esc keys on the notebookâs keyboard to open the HP System Information window.