Mobile Display Types Flashcards
(36 cards)
What are the two main technologies used in mobile system displays?
Liquid Crystal Displays (LCD) and Light Emitting Diodes (LED)
LCD and LED technologies are fundamental to modern mobile devices and monitors.
What is the basic principle of Liquid Crystal Displays (LCD)?
LCDs use liquid crystal technology, where crystals can be aligned in various patterns and manipulated with electricity
This manipulation affects refresh rates, image quality, and display performance.
What type of display requires backlighting?
Non-emissive or passive displays
LCDs require backlighting, often provided by LEDs.
How do In-Plane Switching (IPS) displays work?
Liquid crystals are aligned horizontally and manipulated by passing electricity between the ends
This alignment affects color accuracy and viewing angles.
List three uses of IPS technology.
- Touch screen displays
- High-end monitors
- Design and media applications
What are the positive features of IPS displays?
- Vibrant colors
- High quality graphics
- Wide viewing areas
- Excellent color reproduction and accuracy
What are the negatives of IPS displays?
- Expensive
- Low refresh rates
- Slow response times
- Affected by ‘IPS Glow’
What characterizes Twisted Nematic (TN) displays?
They use twisted liquid crystals that untwist when voltage is applied
This change in angle affects the light transmission.
What are the primary uses of TN displays?
- Basic business use
- Rapid display response games
What are the advantages of TN displays?
- Low cost
- Excellent refresh rates
- Fast response times
- Versatile manufacturing
What are the drawbacks of TN displays?
- Narrow viewing angles
- Low image quality
- Poor color accuracy and contrast
How do VA displays operate?
Liquid crystal molecules are vertically aligned and tilt when electricity is applied
What is a common use for VA displays?
General purpose applications, including graphic work, movies, and TV
What are the strengths of VA displays?
- Great contrast
- Deep black shades
- Fast response times
What are the weaknesses of VA displays?
Motion blur and ghosting with fast-motion visuals
What distinguishes Organic Light Emitting Diodes (OLED) from LCDs?
OLEDs emit light using organic materials, making them emissive or active displays
Describe the structure of an OLED display.
An emissive layer between a cathode and an anode
Electricity creates light as it passes through these layers.
List three uses of OLED technology.
- Foldable smartphones
- Rollable TVs
- VR headsets
What are the advantages of OLED displays?
- Excellent picture quality
- Wide viewing angles
- Infinite contrast
- Energy efficient
What are the downsides of OLED displays?
- Sensitive to light and moisture
- Blue LEDs degrade faster
- Prone to image retention and burn-in
What is the function of Active Matrix Organic Light Emitting Diode (AMOLED) technology?
Uses active matrix technology to control each pixel for rapid changes
This includes brightness and color adjustments.
What are common applications for AMOLED displays?
- High-end mobile devices
- Flat screen monitors
- Curved screens
What are the benefits of AMOLED displays?
- High picture quality
- Fast response time
- Consistent color and brightness
What are the disadvantages of AMOLED displays?
Same problems as OLED displays, plus manufacturing complexity
