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Video and multimedia input/output devices

Video and multimedia input/output devices. Unit objectives Describe, install, and troubleshoot CRT displays Describe, install, and troubleshoot LCD displays Connect and use speakers and a microphone Connect and troubleshoot scanners and digital cameras. Topic A.

zephania-estrada
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Video and multimedia input/output devices

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  1. Video and multimedia input/output devices Unit objectives • Describe, install, and troubleshoot CRT displays • Describe, install, and troubleshoot LCD displays • Connect and use speakers and a microphone • Connect and troubleshoot scanners and digital cameras

  2. Topic A • Topic A: Cathode ray terminals • Topic B: LCDs and other video technologies • Topic C: Sound input and output devices • Topic D: Scanners and cameras

  3. CRT monitor

  4. CRT components • Cathode • Anode • Phosphors • Pixel triad • Electronic beam positioning • Shadow mask • Aperture grill • Slotted mask

  5. How CRTs produce images

  6. Activity A-1 Examining how CRTs produce images

  7. CRT characteristics • Screen size • Aspect ratio • Resolution • Refresh rate • Dot pitch • Flat or curved screen

  8. Activity A-2 Comparing monitor specifications

  9. Video connectors

  10. Display properties • Screen resolution • Color quality • Monitor settings • Color depth

  11. Display adjustments • Brightness • Contrast • Position of image on screen • Adjustment method varies by monitor

  12. Activity A-3 Installing a CRT

  13. CRT issues • Screen is black • Image flickers or distorts • Noisy monitor • Image scrolling • Video Display Troubleshooter

  14. Activity A-4 Troubleshooting CRT problems

  15. Topic B • Topic A: Cathode ray terminals • Topic B: LCDs and other video technologies • Topic C: Sound input and output devices • Topic D: Scanners and cameras

  16. Flat panel monitor

  17. LCD advantages • Less power is used • Less heat is created • Use less desk space • Less glare • Less radiation emitted

  18. How a flat panel screen works

  19. Flat panel monitor characteristics • Screen size • Viewing angle • Response rate • Contrast ratio • Native resolution • Brightness • Other features • Change orientation • Built-in speakers • Anti-theft lock • Wall mounting

  20. Flat panel monitor connections • Connection types • 15-pin VGA style connection cable • DVI-D • DVI-I

  21. DVI-D • Digital-only connection • Dual-link contains 24 pins in 3 rows of 8 plus a grounding slot • Single-link contains 18 pins

  22. DVI-D connector DVI-D connector

  23. DVI-I • Supports digital and analog signals • DVI-I contains 4 additional pins over DVI-D • Extra 4-pins carry analog signals • Analog signal pins located above and below the grounding slot

  24. TMDS • Transition minimized differential signaling • Protocol used to transmit data to digital monitor • No analog conversion • Single-link cables use one TDMS transmitter • Dual-link cables use two TDMS transmitters • Supported resolutions • Single-link up to 1920x1080 • Dual-link up to 2048x1596

  25. Touch screen • Touch-sensitive surface • Pressure-sensitive resistors • Infrared sensors • Electronic capacitors • Uses • PDAs • Point-of-sale terminals • Bank ATMs

  26. Touch screen input methods • Additional layer with electrical current • Capacitors between layers • Acoustic waves

  27. Activity B-1 Examining how LCDs produce images

  28. Multiple monitors

  29. Display projectors • Show computer screen to large groups • Useful for meetings and classroom • Connect using • VGA • S-Video • Composite • USB • Serial

  30. DisplayPort technology • New specification developed by VESA • Covers • Displays • CRT • LCD • Plasma • Projection • Connections • PCs • Game systems • DVD players • Other image sources

  31. Activity B-2 Installing an LCD monitor

  32. LCD monitor issues • Indicator light colors • Shaky image • Fuzzy image • No image • Discolored image

  33. Activity B-3 Troubleshooting LCD problems

  34. Topic C • Topic A: Cathode ray terminals • Topic B: LCDs and other video technologies • Topic C: Sound input and output devices • Topic D: Scanners and cameras

  35. Speakers connected to a PC

  36. Speakers connected together

  37. Activity C-1 Connecting speakers

  38. Microphone connection to a PC

  39. Activity C-2 Using a microphone

  40. Music keyboard connected to ⅛” jack

  41. MIDI connections

  42. Activity C-3 Connecting musical instruments to a computer

  43. Topic D • Topic A: Cathode ray terminals • Topic B: LCDs and other video technologies • Topic C: Sound input and output devices • Topic D: Scanners and cameras

  44. Flatbed scanner

  45. Multifunction sheetfeed scanner

  46. Hand-held scanner

  47. TWAIN • Supported by scanners and imaging applications • “Never the twain shall meet” • TWAIN eases scanner connection • Most scanners have more full-featured software from manufacturer

  48. Scanner configuration features • Image type • Scan mode • Scan resolution • Scaling • Destination • Image control • Preview features • Scan

  49. Scanner connections • Older scanners • Slow parallel ports • SCSI devices • Current scanners • USB • FireWire • All PnP-compliant • Use Device Manager to update driver

  50. Activity D-1 Connecting a scanner

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