Mobile Devices - Laptops, Tablets, Phones Flashcards
What is Energy Density in relation to batteries?
How much energy can be stored per size/weight of the battery. Higher energy stored/size ratio is better in laptops. Lithium-ion is the most common type of laptop battery and is largely so popular due to it’s high energy density.
What are some types of laptop battery?
Lithium-ion (Li-ion) - the most commonly used. LI-ON apex predator of the battery family.
Lithium-ion polymer (LiPo) - don’t last as long as lithium-ion in terms of lifecycle.
Nickel-cadmium.
Nickel-metal hydride.
Why do laptops have fn keys and different layouts to regular PC keyboards?
Due to laptops being and getting a lot smaller function keys (Fn) and different key layouts have to be used to fit all keys and still provide full functionality to laptop uses.
What are the benefits of an M.2 drive over an SSD in a laptop/mobile device.
A lot smaller form factor/size.
No SATA or power cables required.
Better performance/speed than standard SSD’s.
What does SO-DIMM standard for in memory/storage?
Small Outline - Dual In-line Memory Module - memory module with a smaller form factor/size and thickness than standard DIMM designed for laptops and other small devices.
SO-DIMM are usually easy to replace in laptops but sometimes they are soldered onto the MOBO which means you have to buy a whole MOBO to upgrade the device storage. This is often costly and a lot more labour intensive.
What are the benefits of an SSD over an HDD?
No moving parts.
Much faster speeds (read and write).
Smaller form factor/size.
What do mini PCI and mini PCIe (express) cards do on laptops?
Allow you to connect via bluetooth (WirelessPAN) and WiFi (WirelessLAN) to networks.
What is WWAN?
Wireless Wide Area Network - cellular/mobile internet connection.
What are Biometrics in relation to computer security?
Biometrics are a way of authenticating a user and thereby allowing them access to a device and restricting non-biometrically authorised users access.
They are more secure than passwords or PIN’s although may be used in conjunction with one of these for enhanced security protocol.
Examples include fingerprints and facial recognition ID (Windows Hello Face) and require onboard software working in combination with external hardware (such as a fingerprint scanner/camera) to authorise user access to said device.
What does NFC stand for?
Near Field Communication (short range wireless protocol for small data transfer, used for small payments and user authentication on devices)
What does LCD stand for and what are some pros of it compared to other screen technologies?
Liquid Crystal Display.
Pros (relative to other screen types) :
-Inexpensive to make
-Lightweight
-Low power consumption
What is a TN LCD and what is good and bad about it?
Twisted Nematic Liquid Crystal Display - is the original LCD monitor technology and has a fast response time but bad viewing angles and not the best colour representation compared to the other 2 LCD types.
What is an advantage and a disadvantage of an IPS panel (monitor) vs a TN (Twisted Nematic) LCD screen?
An IPS (In Plane Switching) LCD has better colour representation than a TN monitor but is also more expensive to produce.
(Great for graphics due to the colour)
Which LCD type would be best for a graphic designer?
TN, IPS, VA
IPS due to excellent colour representation.
What is the VA LCD screen type?
Vertical Alignment Liquid Crystal Display is the jack of all trades master of none LCD type. Compromise of the two.
It has better response time than IPS but worse colour and slower response time than the TN but better viewing angles (colour).
