Input and Output Devices Lesson 3

What is an output device?

• Define
• List examples
• Describe the function
• None of the above

Name a commonly used output device in computing.

• Speaker
• Keyboard
• Mouse
• Scanner

What is the main purpose of speakers as output devices?

• Convert digital data to sound
• Display images
• Input data
• Provide cooling

How do Light Emitting Diode (LED) screens function as output devices?

• They use LEDs for backlighting
• They print out visual data
• They emit sound
• They scan images

What is a unique feature of Liquid Crystal Display (LCD) screens?

• Use of liquid crystals
• Emitting diodes
• Projecting images
• Converting digital to analog signals

Describe the role of an actuator as an output device.

• Movement control
• Data storage
• Image display
• Sound production

Give an example of where an actuator might be used.

• Computer monitor
• Automatic door
• Headphones
• Keyboard

What distinguishes Digital Light Processing (DLP) projectors from other types?

• Use of micro-mirrors
• Emitting light directly
• Printing images
• Recording video

How do LCD projectors create images?

• Using a spinning color wheel
• Through micro-mirrors
• By projecting direct light
• Utilizing liquid crystals

What is the primary difference between LED and LCD screens?

• Type of backlighting
• Method of displaying color
• Size of the screen
• Energy consumption