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.
Many Compaq Presarios are identified on the front of the computer by a series number rather than the actual model number. For example, your Presario may be labeled with 5000 on the front of the case, but it is actually part of a 5000 series PC. The correct model number may be 5WV283.