1. Examining Display Devices Computer Concepts Unit B

2. Examining Display Devices Give examples of Output devices: – Monitor, Primary output device – Printer – Speaker – Headphone

3. Examining Display Devices Why are some monitors so much bulkier than others? – They are bulky and big because of the technology they use. – CRT CRT – CRT ( Cathode Ray Tube) monitors

4. Examining Display Devices What are my choices for a monitor? CD ( Liquid Crystal Display) LCD ( Liquid Crystal Display) screen. Monitors are also called flat-panel displays LCD monitors produce an image by manipulating light within a layer of liquid crystal cells. Notebook Used in Notebook computers Advantages: – Display clarity – Low radiation emission – Portability – compactness

5. Examining Display Devices What are my choices for a monitor? LED LED LED ( Light Emitting Diodes) screens. Looks like LCD.

6. Examining Input Devices What type of screen do handheld devices use?? – OLED ( Organic Light Emitting Diodes) – Used in GPSs and cell Phones Use less power than LCD Have bright, crisp image and faster response rate than standard LCD. – Expensive??? – As the technology develops, they are likely to become less expensive even more popular.

7. Examining Input Devices Why should I care which graphic card is in my computer? – A Graphic Card: – A Graphic Card: contains the circuitry that generates the signals for displaying an image on the screen. – The amount of available memory is the key to the overall performance. – Response rate – Response rate: is how fast a screen update the information being displayed.

8. Examining Input Devices What determines the best image I’ll get on the screen? – Resolution: – Resolution: the maximum number of horizontal and vertical pixels that are displayed on the screen. – Pixel (picture element) – Pixel (picture element) is a single point or the smallest unit in a graphic image.

9. Examining Display Devices What determines the best image I’ll get on the screen? Higher resolution, computer displays a larger work area with text and another objects smaller. Try to change your monitor resolution and see the difference. – 1024 X 768 resolution – 800 X 600 resolution

10. Examining Display Devices What is the typical screen size for a monitor? – Screen size – Screen size is the measurement in inches from one corner of the screen diagonally across to the opposite corner. 13” 24”. Monitor screen sizes range from 13” to 24”. – Viewing angle width – Viewing angle width: which indicates how far to the side you can still clearly see the screen. 170150 A 170 degree viewing angle is better than a 150 degree viewing angle

11. Examining Display Devices What is dot pitch? – Dot pitch (dp) – Dot pitch (dp): is a measure of image clarity. – Not like resolution, it is not customizable.

12. Examining Display Devices Can I customize the color settings for my monitor?Yes – Color depth bit depth – Color depth or bit depth : the number of colors that a monitor and graphics card can display. – 24-bit color depth>>> display more than 16 million colors

13. Examining Display Devices Can I use computer monitor to watch TV?Yes – If your display system equipped with: – NTSCNTSC – NTSC : N ational T V S tandards C ommittee – HDTVHDT – HDTV : H igh D efinition T elevision

14. Thank you Questions !!! Questions !!!