Output Devices Quiz

Output Devices

• An output device is a device that displays or presents the output of a computer system.

Display Devices

• Transient information displayed on a display device is referred to as "soft copy" because it exists electronically and displays only for a short period.
• A display device conveys text, graphics, and video information to the user.

Types of Display Devices

• The two main types of display devices are Cathode Ray Tube (CRT) monitors and Liquid Crystal Display (LCD) monitors.

Advantages of Colors on Display Devices

• Using colors on display devices can enhance the user's experience, improve communication, and make the information more attractive.

CRT Monitors

• CRT monitors work like a standard television, using an electron gun to shoot beams of electrons at a phosphor coating, creating an image on the screen.

LCD Monitors

• LCD monitors use a layer of liquid crystals to block or allow light to pass through a matrix of pixels, creating images on the screen.
• Characterized by using a layer of liquid crystals to block or allow light to pass through a matrix of pixels.

Energy Consumption

• CRT monitors consume more energy than LCD monitors.

Video Cards

• A video card, also known as a graphics card, is responsible for rendering images on the screen.
• The number of colors that a video card can display is determined by the number of bits used to represent the color.

Adaptors

• An EGA (Enhanced Graphics Adaptor) displays 320 x 200 pixels in 4 colors.

Disadvantages of Display Devices

• The main disadvantage of display devices is eye strain or fatigue.

Cost of Display Devices

• LCD monitors are usually more expensive than traditional CRT monitors.

Image Quality

• The sharpness and clearness of an image are referred to as its resolution.
• LCD monitors are characterized by using a layer of liquid crystals to block or allow light to pass through a matrix of pixels, creating images on the screen.

Common Advantage of Display Devices

• A common advantage of display devices is that they can enhance the user's experience, improve communication, and make the information more attractive.