Chapter 7 : Understanding Output

What is Output?
Output is data that has been processed into a useful form. An output device is any type of hardware component that conveys information to one or more people. For example, word that produce in monitor screen is a output of computer.

Display Devices
A display devices visually conveys text, graphics, and video information. A monitor is packaged as a separated peripheral as LCD monitor and Widescreen.

1. Liquid crystal display (LCD) uses a liquid compound to present information on a display device.
1. Active-matrix display
2. Passive-matrix display
2. The quality of an LCD monitor or LCD screen depends primarily on:
1. Resolution, is the number of horizontal and vertical pixels in a display device.
2. A higher resolution uses a greater number of pixels.
3. Response time
4. Brightness
5. Dot pitch
6. Contrast ratio
3. The graphics processing unit (GPU) controls the manipulation and display of graphics on a display device. 
4. LCD monitors use a digital signal and should plug into a DVI port, an HDMI port, or a Display port. 
5. Plasma monitors are display devices that use gas plasma technology and offer screen sizes up to 150 inches. Televisions also are a good output device. 
1. Require a convert if you are connecting your computer  to an analog television. 
2. Digital television (DTV) offers a crisper, higher-quality output. HDTV is the most advanced form of digital television.
6.  A CRT monitor is a desktop monitor that contains a cathode-ray tube. Have a much larger footprint than do LCD monitors.

Is that amazing? Electronic device that surround us can consider as output. Smart phone also one of output device.

Printers is also a output device. A printer produces text and graphics on a physical medium. Printed information is called a hard copy, or printout. Hard copy can be landscape or portrait orientation. People use printer to print document and photo. Nowadays, printer can be connect to internet by using WIFI, so, we just need to connect to the printer, without opening computer, we can print our stuff.
Printer have few type:A non-impact printer  forms characters and graphics on a piece of paper without actually striking the paper.

1. Ink-jet printers, forms characters and graphics by spraying tiny drops of liquid ink onto a piece of paper. It can be color or black and white printout. Printers with a higher dpi (dots per inch) produce a higher quality output.
2. Photo printers, produces color photo-lab-quality pictures. Most use ink -jet technology PictBridge allows you to print photos directly from a digital camera. It can print from a memory card and preview photos on a built-in LCD screen.
3. Laser printers which is High speed and High Quality. It has Black and white, and Color
4. Thermal printers generates images by pushing electrically heated pins against the heat sensitive paper. 
5. Mobile printers is a small,lightweight, battery-powered printer that allows a mobile user to print form a notebook computer, smart phone, or other mobile device.
6. Label and postage printers
• A label printer is a small printer that prints on adhesive-type material.
• A postage printer prints postage stamps. Postage also can printed on other types of printers.
7. Plotters are used to produce high quality drawings.
8. Large format printers create photo-realistic quality color prints on a larger scale. For example banner.
9. A multi function peripheral (MFP) is a single device that prints, scans, copies, and in some cases, faxes. Sometimes called an all in one device.
10. Impact printers form characters and graphics on a piece of paper by striking a mechanism against an inked ribbon that physically contacts the paper.
• Dot-matrix printer which produces printed images when tiny wire pins on a print head mechanism strike an inked ribbon.
• Line printer which prints an entire line at a time.

When we want to listen to music, what we will use? IS Speakers, Headphones, and Earbuds which is an audio output device produces music, speech, or other sounds. Most computer users attach speakers to their computers to:

• Generate higher quality sounds for playing games.
• Interact with multimedia presentations.
• Listen to music
• View movies

Headphones are speakers that cover or are placed outside of the ear. Earbuds (also called earphones) resit inside the ear canal. Some speakers are specifically designed to play audio from a portable media player. Wireless speakers many people use to connect to smart phone and computer. Bluetooth speaker also popular.

Voice output occurs when you hear a person's voice or when the computer talks to you through the speakers. Some Web sites dedicate themselves to providing voice output. Often works with voice input. VoIP uses voice output and voice input.

Other Output Devices are available for specific uses and applications.

1. Data projectors is a device that takes the text and images displaying on a computer screen and projects them on a larger screen.
2. LCD projector
3. Digital light processing (DLP) projector
4. Interactive whiteboards is a touch sensitive device, resembling a dry-erase board, that displays the image on a connected computer screen.
5. Force-feedback game controllers sends resistance to the device in a response to actions of the user. 
6. Tactile output provides the user with a physical response from the device