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Television Choices. April 2006. Types of TVs. Flat Panel Plasma LCD Projection- front and rear DLP LCD LCoS Tube. Flat Panel. create bright, crisp images without using traditional picture tubes. super-slim, wall-mountable TVs use either plasma or LCD (Liquid Crystal Display) panels.

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Presentation Transcript
types of tvs
Types of TVs
  • Flat Panel
    • Plasma
    • LCD
  • Projection- front and rear
    • DLP
    • LCD
    • LCoS
  • Tube
flat panel
Flat Panel
  • create bright, crisp images without using traditional picture tubes.
  • super-slim, wall-mountable TVs use either plasma or LCD (Liquid Crystal Display) panels.
  • Size: Up to 46" for LCD; up to 61" for plasma.
plasma
Plasma
  • Pros: screen's phosphor coating creates lifelike color that is closest to conventional tube TVs
  • Cons: vulnerable to burn-in although it's less of an issue for newer models
  • Size: 37"-61"
slide5
LCD
  • Pros: panels weigh less than plasma and use less energy; burn-in not an issue
  • Cons: picture slightly less natural than top plasmas
  • Size: 13"-46"
projection rear rptv
Projection- Rear (RPTV)
  • clear, sharp pictures that look best when viewed straight on, from a seated position, looks dimmer if you're viewing from the side, or standing up.
  • take up more space than direct-view TVs, and their larger screens require greater viewing distance for optimum results.
  • Size: 42" to 70".
  • Technology: DLP, LCD, or LCoS technology TVs have cabinets that are shallow and lightweight compared to conventional big-screen models
front projection
Front-projection
  • two-piece system: projector and screen.
  • heavy, expensive CRT-based units that require professional installation and maintenance.
  • compact, lightweight digital home theater projectors.
  • big, bright images create more emotional impact than any other display type.
  • Size: 40" to 300".
  • Technology: DLP, LCD, and LCoS projectors. perform best in reduced light or darkness,
dlp digital light processing
DLP(Digital Light Processing)
  • developed by Texas Instruments, based on their Digital Micromirror Device (DMD) microchip.
  • Each DMD chip has hundreds of thousands of tiny swiveling mirrors which are used to create the image.
  • DLP technology is used in both front- and rear-projection systems.
lcos liquid crystal on silicon
LCoS (Liquid Crystal on Silicon)
  • sandwiches a layer of liquid crystal between a cover glass and a highly reflective, mirror-like surface patterned with pixels that sits on top of a silicon chip.
  • layers form a microdisplay that can be used in rear-projection and front-projection TVs.
  • Manufacturers use different names for their LCoS-based technologies. JVC uses D-ILA™ or HD-ILA™, while Sony uses SXRD™.
tube direct view crt
Tube (direct-view CRT)
  • (cathode-ray tube) TVs are what most of us watch.
  • sharp, bright images provide a vivid viewing experience in virtually all rooms and lighting conditions.
  • Size: Up to 36".
  • Technology: Built around a single large CRT ("picture tube") — a specialized vacuum tube in which images are created when an electron beam scans back and forth across the back side of a phosphor-coated screen.
screen resolution
Screen resolution
  • number of horizontal pixels times the number of vertical pixels
    • SDTV- 640 x 480 pixels
    • HDTV- 1280 x 720 or 1920 x 1080 for
    • EDTV (Enhanced-Definition)—852 x 480
resolution
Resolution
  • HDTV - film-quality picture offers detail, dimensionality, and rich, vibrant colors that the 60-year-old analog NTSC TV format can't begin to match, include upconversion circuitry to give non-HD signals (DVD, antenna/cable, digital satellite, etc.) a cleaner, smoother look.
  • SDTV digital format has better picture quality than existing broadcast and cable service.
aspect ratio 4 3 vs 16 9
Aspect ratio — 4:3 vs. 16:9
  • conventional squarish 4:3 aspect-ratio - widescreen (most HDTV) 16:9 aspect ratio.
  • 4:3 HDTV-ready TVs are required to include a special viewing mode that displays widescreen material like HDTV broadcasts and anamorphic DVDs in a 16:9 "window" with black bars above and below the picture.
  • analog TV broadcasts are scheduled to end in 2009, and video programs will continue to shift to widescreen formats.
  • 16:9 TVs can display 4:3 programs in a central 4:3 window with black or gray bars filling out the screen's width on the sides, also usually include several viewing modes designed to make 4:3 material fill the screen's width by magnifying and/or stretching the image.
tv sound
TV sound
  • TV part of a home theater, use A/V receiver and speakers to process and deliver video sound
  • built-in amplifier power output varies from 2 to 20 watts per channel. Higher power = cleaner, more realistic sound, and louder levels without distortion.
  • RPTVs have more room in their cabinets for speakers ( usually 15+ watts per channel), sound quality good, still doesn't compare to even a budget-priced receiver and speakers.
  • HDTV sets (those with some type of built-in HD tuner) include a digital output, through which they can send a crystal-clear Dolby Digital sound that is standard on HDTV broadcasts via a single-cable digital connection to your A/V receiver.
hook ups
Hook-ups
  • TV built in A/V inputs- usually limited in number and types
hook ups1
Hook-ups
  • A/V home theater receivers provide multiple video inputs and outputs to enable video switching, which makes it easy to choose from among your various video sources.
hook ups2
Hook-ups
  • External switching devices/ RF converters
components
Components
  • Antenna, satellite TV receiver or cable box
  • DVD player and VCR
  • video game system(s)
  • DVR/TiVo hard disk recorder
  • camcorder-preferably front-panel A/V inputs