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.
Using System Information. Another way to locate the model of your HP laptop is by using the System Information screen. Press FN-Esc to open the HP System Information window. A lot of information will be displayed within this window, but all you'll need to look for is the Product Number heading.