3.2 · Lesson 2 of 3
Output devices
Syllabus 3.2.2
What this lesson covers
- Describe a range of output devices and why they are needed
Key vocabulary
- Output device
- Hardware that takes data from a computer and turns it into a form people can use, or makes something happen.
- Actuator
- Turns an electrical signal into physical movement, e.g. a motor or valve.
- Inkjet printer
- Prints by firing tiny droplets of liquid ink through nozzles.
- Laser printer
- Prints using a charged drum and toner, which is fused onto the paper by heat.
- 3D printer
- Builds a solid object layer by layer from a digital model.
- DLP projector
- Uses a chip of millions of tiny tilting mirrors to create an image.
- LCD screen
- Uses a backlight shining through liquid crystals and colour filters.
- LED screen
- Each pixel is made of red, green and blue LEDs that produce their own light.
Check your learning
- Quick check: 4 questions
- Key vocabulary test: 8 terms
- Activity 1: Laser printer steps · drag and drop
- Activity 2: Choose the output device · 8 questions
- Activity 3: Output devices quiz · 8 questions