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.
Looking up an HP laptop model number based on a serial number is easy to do using an online tool provided by HP. If you have access only to a list of serial numbers for your company's laptops and you want to update an asset tracking database, you'll need additional information about each computer. For instance, the model number is one important detail that you will want to enter into your records. Obtaining this information is as easy as typing a serial number into a Web form and writing down the model number provided by the HP website.