Older laptop panels relied on a cold cathode fluorescent lamp (CCFL) - a thin luminescent tube that needs an inverter - to provide the backlight behind the liquid-crystal layer. Which display technology uses this type of fluorescent tube as its light source?
Plasma
LED
LCD
OLED
LCD (Liquid Crystal Display) panels that employ CCFL backlighting contain a small fluorescent tube running along one edge or behind the panel. The lamp's ultraviolet discharge excites phosphors inside the tube, producing white light that passes through the liquid-crystal matrix to form an image. LED-backlit screens still use an LCD panel but replace the fluorescent tube with light-emitting diodes, improving efficiency and thickness. Plasma displays create light within each pixel via ionized gas cells and do not require a separate backlight, while OLED pixels are self-emissive and likewise need no external lamp.
Bash is our AI bot, trained to help you pass your exam. AI Generated Content may display inaccurate information, always double-check anything important.
All IT & Cybersecurity Package plans include the following perks and exams .
Our pricing is simple. Full access to all certifications and exams in each package, for one price.
As many practice tests for as many topics as you want.
Use study mode non-stop, no limits.
Access to our AI assistant, Bash, trained to help you pass your exam.
Track your scores over time in study mode and report cards.
See how you improve over time, and where you need to focus.
Access our store with even bigger discounts than before.
Unlimited access to all performance questions and be prepared for the real thing.
All IT & Cybersecurity Package plans include unlimited access to the following study materials.
Create an account or sign in to access our study materials.