Display + Video Flashcards
What is resolution?
A measurement of an image’s sharpness and clarity.
The more pixels of an image the higher the resolution.
What is color depth?
The number of bits used for each color component of a single pixel.
What is refresh rate?
The number of times per second that the image refreshes on a screen.
Which determines over all how smoothly motion appears on the screen.
What do LCDs use to backlight the screen?
LEDs
What is Edge-Lit White LED?
EL-WLEDs are when displays use white LEDs along one edge of the LCD
and
A light diffuser to backlight the screen.
EL-WLEDs are the least expensive and thinnest most widely used type of LCD.
Full-array WLED displays are?
Able to dim specific regions on the screen, resulting in a higher contrast ratio than Edge-Lit WLEDs.
What are RGB-LED displays?
They are able to emit Red, Green, and Blue light, resulting in superior color accuracy.
They are the most expensive type of backlighting tech.
What is CCFL?
Cold Cathode Fluorescent Lamps.
Used for backlighting.
Able to produce better colors than EL-WLED and Full Array WLED tech.
Consume a lot more energy and require an internal inverter.
Why use TN or Twisted Nematic panels?
They have a very good response time 1-5 ms and refresh rates of 60-144Hz. ( good for PC gaming.)
What are the issues with TN panels?
They have imperfect color reproduction because only six bits per color can be displayed. Mimicking 24-true bit color using dithering and other techniques.
They have poor viewing angles and contrast ratios.
What are the advantages of In Plane Switching (IPS)?
They have the best color reproduction quality and viewing angles among LCDs.
What are the disadvantages of IPS panels?
They have a relatively slow response time 5-16 ms and refresh rates of 60Hz.
Slight purple tint when viewed from a wide angle.
High-end IPS LCDs are very expensive.
What do plasma displays use?
They are made of millions of small cells that contain electrically charged ionized gases.
What are the advantages of plasma displays?
They display colors more accurately than LCD displays.
They have no backlighting and by proxy it means they have higher contrast/ better blacks.
the have almost no motion blur due to the speed of the gas reaction and the way they draw frames.
What are the disadvantages of plasma displays?
They consume two to three times as much power as LCDs.
They generate much more heat than other display types.
The gasses inside are sensitive to air pressure fluctuations.
They suffer from a problem known as image retention.
Making displays smaller than 32 inches is not profitable.
