How are black and white particles moved?

By electric fields acting on their charges

Do E Ink screens emit their own light like phones?

No, they reflect light; front lights are added

What is ghosting on E Ink?

Faint traces of a previous image

E Ink Display Quiz: Charged Particles and Paper-Like Screens

This e ink display quiz turns the page on a digital reader. Play 10 interactive questions on microcapsules holding charged white and black pigments, E Ink Corporation's roots at the MIT Media Lab, why the screen uses power only when the image changes, reading in bright sunlight, ghosting and slow refresh, the Kindle's 2007 debut, color E Ink and shelf labels in shops.

Start E Ink Display Quiz

🎯 Daily Trivia Challenge • 🧠 10 Questions • ⏱️ 150 Seconds

Question 1 / 10 Time: 150s

Caps
What holds the pigments in many E Ink screens?
Charge
How are black and white particles moved?
MIT
Where did E Ink technology begin?
Power
When does an E Ink screen use the most power?
Sun
How do E Ink screens look in bright sunlight?
Light
Do E Ink screens emit their own light like phones?
Ghost
What is ghosting on E Ink?
Kindle
When did Amazon launch the first Kindle?
Slow
Why is E Ink poor for video?
Shop
Where else are E Ink screens used?

Explanations: answer key for all 10 questions

Q1: What holds the pigments in many E Ink screens?
Answer: Tiny microcapsules
Millions fill the display.
Q2: How are black and white particles moved?
Answer: By electric fields acting on their charges
Opposite charges move opposite ways.
Q3: Where did E Ink technology begin?
Answer: The MIT Media Lab
The company was founded in 1997.
Q4: When does an E Ink screen use the most power?
Answer: When the image changes
Still pages need almost none.
Q5: How do E Ink screens look in bright sunlight?
Answer: Easy to read, like paper
They reflect light.
Q6: Do E Ink screens emit their own light like phones?
Answer: No, they reflect light; front lights are added
Front lights shine on the surface.
Q7: What is ghosting on E Ink?
Answer: Faint traces of a previous image
Full refreshes clear it.
Q8: When did Amazon launch the first Kindle?
Answer: 2007
It used an E Ink screen.
Q9: Why is E Ink poor for video?
Answer: It refreshes slowly
Particles take time to move.
Q10: Where else are E Ink screens used?
Answer: Electronic shelf labels
Prices can update remotely.

Paper-Like Screens Explained

Many E Ink displays contain millions of tiny microcapsules filled with clear fluid and charged white and black particles. Electric fields pull particles of one color to the surface and push the other down, forming text and images. The technology began at the MIT Media Lab, and E Ink Corporation was founded in 1997.

E Ink screens use power mainly when the image changes, so a still page needs almost none and batteries last for weeks. They reflect light like paper, staying easy to read in bright sunlight, and do not glow on their own; front lights shine on the surface for reading in the dark.

Particles take time to move, so E Ink refreshes slowly and is poor for video. Faint traces of a previous page, called ghosting, are cleared by full refreshes. Amazon's first Kindle launched with E Ink in 2007, and electronic shelf labels in shops use it too, updating prices remotely. Color E Ink screens add color filters or pigments.

What This Quiz Teaches

Tech fans will enjoy these questions.

How E Ink works
Where it began
Why it saves power
Why it is slow
Where it is used

Did You Know?

Some phones have E Ink back screens.
E Ink is called electronic paper.
Cold temperatures slow refresh.
Bus stop signs can use E Ink.
Note-taking tablets use E Ink.