901 - 3.0 Mobile Devices
3.2 Explain the function of components within the display of a laptop
Type
LCD P.686
TN vs IPS P.686
Fluorescent vs. LED backlighting P.689-690
OLED - organic light-emitting diode P.936
WIFI antenna connector/placement
3.4 Explain the characteristics of various types of other mobile devices
Tablets
Smartphones
Very similar to smartphones (like large smartphones --> without the phone.
Run the same OSs and apps
Use the same multi-touch screens
Lights the screen with an organic of compound
Use less electricity than LCSs
Screens larger than half a dozen iches
Disadv
- Too expensive to make for mainstream consumer devices
- Don't use backlights at all - can display true black
Apps for performing the same task
Get less obvious over time than single-purpose devices
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Twisted Nematic (TN) use thin film transistor (TFT) (active matrix technology ) to display
In-Plane Switching (IPS) P.689
Create a wider viewing angle and far better color re-creation than TN panels can provide
Used for graphic professionals
- 6 bits display - red, green, and blue
- 18 bit display will not reproduce the full 24-bit true color
Manufactures use many types of IPS technology to find the right mix of price-to-performance.
LCD Monitors with CCFL backlights
Cold cathode fluorescent lam(CCFL)
Low power use
Brightness
Long life
LED Monitor
Light-emitting diode (LED)
Use AC power, but given the transformer converts the
AC power--> DC power
Disadv --> costs a lot more than the edge types
The edge type function similarly to a CCFL-style display
Reduces the overall electricity usage
- (X) use AC power
- outstanding contrast and color
- outstanding contrast and color
Disadv
- Panel fudges a little bit when asked to do something it can't do
- This can produce noticeable problems with reproduction
Reduces the thickness of the panel
Used for many smaller devices such as smartphones and tablets