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December 27th > Mobile Display Types > Flashcards

Mobile Display Types Flashcards

1
Q

Mobile Consumption Devices

3

A
  • Smartphones or Tablets
  • Consume information and not produce information
  • Typically have touchscreens
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2
Q

Touchscreens

2 Types (8 answers)

A
  1. Capacitive touch screen
    - Any touchscreen that works by seeing the distortion in an electrostatic
    field
    - Distortion is mesured using X/Y coordinate to machine in place of mouse pointer
    - Single tactile input (One touch at a time)
  2. Multi-touch
    - Can process two or more contact points simultaneously
    - Allows you to use two or more fingers
    - Standard among most tablets or mobile devices
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3
Q

LCD

A

Liquid-Crystal Display
- Uses liquid crystal where the properties can change with the application
of voltage

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4
Q

LED (Back lit)

5

A

Light Emitting Diode
- Newer form of light that uses direct current (DC)
- Still going to use TN, IPS, or VA
- Instead of using CCFL to backlight you will use LED powered by DC
- Uses less power leading to longer battery life and better performance

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5
Q

OLED

9

A

Organic Light Emitting Diode
- Each pixel has its own separate LED that provides the light
- Panel doesn’t require separate backlight
- Better contrast ratios
- Display can be thinner
- less power intensive leading to longer battery life
- can be made of plastic
Can be folded, rolled, or manipulated to create different shapes and sizes without damaging components
Cons
- Maximum brightness not as bright as LCD ( cant see in bright sun)
- Susceptible to Burn in (same static image)

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6
Q

Pixel

2

A
  • Picture Element
  • Individual point on a screen inside of a display
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7
Q

TFT

6 Types

A

Thin-film Transistor
- referred to as an LCD panel
- All require backlight
1. Twisted Nematic (TN)
2. In-Plane Switching (IPS)
3. Vertical Alignment (VA)

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8
Q

Twisted Nematic (TN)

6

A
  • Contains crystals that twist or untwist in response to the voltage being
    applied or removed
  • Twist
  • Earliest type of TFT technology
  • Found in Budget laptops, tablet, and smart phones
  • Supports fast response times
  • less motion blur or ghosting when used with something that has a high frame rate
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9
Q

In-Plane Switching (IPS)

5

A
  • Uses crystals that rotate to be able to deliver color
  • Rotate
  • Better color reproduction at a wider range of viewing angles
  • Most IPS panels can support 178 degrees horizontal and vertical viewing angles (Almost view on the side
  • Response times close to TN
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10
Q

Vertical Alignment (VA)

6

A
  • Crystals are tilted to be able to deliver color
  • Tilt
  • Contrast ratio 2-3x better than IPS
  • Really dark darks and really light lights
  • viewing angles not as good as IPS and
  • response times are slower than IPS and TN (will get motion blur or ghosting when viewing fast images on display
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11
Q

Contrast Ratio

1

A

The ratio between the brightest white and the darkest black a display can produce

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12
Q

Back lights

A
  • CCFL
  • Used to light up display panel
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13
Q

Cold Cathode Fluorescent Lamp (CCFL)

3

A
  • Lamp that sits behind the display and lights up the liquid crystal display to show the colors and images properly on the screen
  • If burns out or stops working you wont be able to see things on screen without back light
  • Requires AC voltages (Inverter is installed to convert DC to AC)
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14
Q

Mobile display Types

A

LCD
LED
OLED

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15
Q

Burn-in

A

same static image

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16
Q

Mobile Device Components

3 types

A
  1. Digitizer
  2. Accelerometer
  3. Gyroscope
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17
Q

Digitizer

3

A
  • Layer sandwiched between a layer of protective glass and the display
    panel inside of a touchscreen display
  • Converts touch input into digital software instructions used by operating system
  • Provide haptic feedback to end-user (Vibration when typing on touch key board)
18
Q

Haptic Feedback

2

A
  • Vibration when touching a key on a touchscreen keyboard
  • Form of touch responsiveness from the display back to the end-user.
19
Q

Accelerometer

5

A
  • Combination device that uses hardware and software to measure the
    velocity, rotation, and shaking of a mobile device
  • Focuses on movement cause by Gravity, vibration, quick acceleration
  • Uses: Screen orientation, data loss prevention (detects dropping to stop actuator from reading HD), and gaming (driving games).
  • Does well with X axis (Roll, Horizontal), and Y axis (Pitch, Vertical)
  • Does not do well with Z (Yaw, Depth)
20
Q

Gyroscope

6

A
  • An improved version of the basic accelerometer
  • Pitch (Y, Vertical), Roll (X, Horizontal), and Yaw (Z, Depth)
  • Flight simulator
  • 3D photos and videos
  • Gestures (Shake,
  • Image stabilization
21
Q

Mobile device accessories

8

A
  1. Track pads
  2. Drawing pads
  3. Touch pens
  4. Microphones
  5. Speakers
  6. Headsets
  7. Cameras
  8. Webcams
22
Q

Track Pad

A
  • Device that can be used to manipulate the cursor on the screen
  • two types (Embedded, External (USB))
23
Q

Drawing Pad

3

A
  • Large format touch device attached as a peripheral to a laptop,
    smartphone, or tablet
  • two forms (one looks like large track pad
    drawing pads need a touch pen to uses display
  • most basic form is a signature pad
24
Q

Microphone

A
  • Any device used to record audio or capture voice when making a phone
    call
25
Q

Speakers

1

A
  • Allows to hear things that are coming out from devices, such as music or
    videos
26
Q

Headset

A

Combines both the microphone and speaker into one device

27
Q

Digital Camera

1

A

Provides the ability to capture a live image in a still format

28
Q

Webcam

A

Used to record video

29
Q

Wi-Fi (Wireless Network

A
  • Comes in different types of Wi-Fi, including wireless a, b, g, n, ac, and ax
  • To be able to use you need a wireless radio in device and a Wireless Access point (WAP)
  • Speed is based on wireless card or WAP, which ever one is more limiting will be the one you will operate at.
  • If (Card or WAP) is slower speed this will be operating speed. even if one of the devices supports higher speeds.
  • Wireless connections is slower on smaller devices then on larger devices. (Smaller devices smaller antenna - Larger devices larger antenna)
  • In mobile devces wirless can be enabled or disabled in settings
30
Q

Cellular

A
  • Network that allows to connect to the Internet using cellular radio inside
    the handset and connect to a network service provider
  • We operate on one of two technologies (GSM or CDMA)
    Before 3G, 4G, and 5G there was huge difference but ever since 3G they are pretty much the same.
  • Can enable or disable cellular by going into settings menu or dragging down finger and pressing ICON
  • Airplane mode turns off cellular
31
Q

GSM

A
  • Global System For Mobile Communication
  • Cellular technology that takes the voice during a call and converts it into a
    digital format
  • In US T-Mobile and At&t rely on GSM
  • most places in the world reliess on
  • More widely suppored acorss globe
  • Uses SIM card
32
Q

CDMA

8

A
  • Code-Division Multiple Access
  • Cellular technology that uses code division to split up the channel
  • Verizon rely on CDMA
  • Japan or south Korea
  • More powerful and flexible than GSM
  • Doesnt use SIM crads uses electronic code (Issues with changing provider, locked to phone)- Can useelectronic SIM to get around this.
    ● W-CDMA (Wideband CDMA)
    ● UMTS (Universal Mobile Telecommunications System)
33
Q

PRL

4

A

Preferred Roaming List
- Can update PRL in setting or using phones numeric keys
- Contains all the information about different cellular towers
- Restrictions vary from model to model and depends on the device’s country of origin

34
Q

Bluetooth

A
  • Used as a short-range point-to-point network connection between a
    mobile device and an accessory
  • First must pair by going into pairing
  • then find device
  • some devices require PIN to validate if you dont know check manufacturer manual. Some dont require PIN. SOme have easy pairing mode where deivce sends pass code to connecting device.
  • Be sure to test that device is properly paired (Play music, video, press button, etc.)
35
Q

NFC

9

A

Near-Field Communication
- Allows a device to receive and send information in the NFC format
- The pairing process can be done automatically by using NFC connection
- Most modern devices have NFC transceiver in them
- Allows for the transmision of data over short distances (Normally 2-4 inches, can be as high as 8 inches)
- Most of the time is used for contactless pay (Apple pay)
- can be disabled in settings
- is not only used for contactless pay
- can also be used to connect airpods

36
Q

Hotspot

A
37
Q

IOS

2

A
  • Created by apple for use on Iphone and Ipads
  • Relies on close-sourced code (only used for apple)
38
Q

Android

A
  • Operating system sponsored and created by Google but used by many different providers
  • Offers an open-source code base (offer ability to change look and feel of software)
  • widely available on smartphones and tablets
39
Q

UART

4

A

Universal Asynchronous Receiver-Transmitter
- Device that allows to connect to a device and get information from it
- This is a serial port
- software interface that imitates port

40
Q

Mobile device Connectivity

Wired ways to connect mobile devices

A
  • Lightning Cable
  • USC-C
  • USB 2.0 Micro B
  • USB 2.0 Mini B
  • Serial Cables
41
Q

Port Replicators

A
  • Definition
  • replicates ports (exact features in laptop)
  • In one place where you can easily connect and disconnect things
  • makes life easier by easy access to all ports
  • Single connection to laptop
  • Port mirror
42
Q

Docking Station

3

A
  • Advanced type of port replicator that provides all the capabilities and features of a laptop
  • Also gives new features (i.e. external HDs)
  • Additional ports

December 27th (5 decks)

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