Bureaucrat, staff, administrator
4,335
edits
Changes
m
Although most electronics are available with satisfactory performance in DC models, televisions are a different matter. Miniature TVs are available in DC but larger ones are all AC. There are many different technical specifications between TVs but the goal for you and your guests is simply the experience of picture quality or what is called presence.<ref>http://www.wilcoxlab.yorku.ca/PresencePapers/Lombardetal2000.pdf</ref>== Summary ==
→USB
= Selecting the Right Television =
Although most electronics are available with satisfactory performance in DC models, televisions (TV) are a different matter. Miniature TVs are available in DC but larger ones are all AC. There are many different technical specifications between TVs but the goal for you and your guests is simply the experience of picture quality or what is called presence.<ref>http://www.wilcoxlab.yorku.ca/PresencePapers/Lombardetal2000.pdf</ref> In a small sailboat or cruiser you are likely to prefer a DC model designed for recreational vehicles. In a larger powered boat, with a goal of minimising AC consumption and inverter size, a 50-inch 720-pixel (720p) LED-LCD with a 9-foot (ft) viewing distance is probably optimum. Plasma delivers a better experience but is losing the market because LED-LCD is cheaper to manufacture and can deliver higher resolutions, with less energy consumption. [http://www.displaymate.com/ Displaymate] has an excellent report discussing [http://www.displaymate.com/Display_Myths_Shattered.pdf how to evaluate TV displays].
== Television Types ==
<pre>LCD with CCF are no longer manufactured and are only available used.</pre>
=== Over the Air ===
Over the air (OTA) reception requires an antenna or satellite dish and a tuner in the TV or a separate component. A separate component will give the most flexibility. Historically for analogue broadcasts each country used one of three different broadcast standards: [https://en.wikipedia.org/wiki/NTSC NTSC] in North, Central and Andean South America; [https://en.wikipedia.org/wiki/SECAM SECAM] in France, the former USSR and Central West Africa; and [https://en.wikipedia.org/wiki/PAL PAL] in Europe and most of the rest of the world.
However, the world is adopting Digital television (DTV) and proliferating an even larger number of standards.<ref>https://en.wikipedia.org/wiki/Digital_television</ref> Most DTV OTA direct transmissions are low power and only useful at maximum distances of ~30 miles. The world is moving to streaming video via Internet and less and less by cable. Boats typically use [[MarineSatellite|marine satellite]] to subscribe to cable packages.
The DTV OTA standard in North America is [https://en.wikipedia.org/wiki/ATSC_standards ATSC].
== Picture Quality ==
The [https://en.wikipedia.org/wiki/Contrast_ratio contrast ratio] of a TV screen is the ratio of the [https://en.wikipedia.org/wiki/Luminance luminance] of white and black. A high contrast ratio is desirable. Because TVs can mostly achieve the same brightness of white, the contrast ratio really represents how dark black will be, and a higher number will mean darker blacks instead of a washed-out grey. Contrast is difficult to measure and manufacturers exaggerate so check the findings of reviewers.<ref>http://ca.rtings.com/tv/tests/movies/dark-scene/contrast-ratio</ref>
On your TV, contrast controls only the bright parts of the image. Set this too high, and you’ll wash out detail in clouds, snow, etc. Set it too low, and the image will look flat and dark.
Different types of TV have different contrast profiles. [http://www.cnet.com/ CNET] recommends:<ref>http://www.cnet.com/news/contrast-ratio-or-how-every-tv-manufacturer-lies-to-you/</ref>
However, LCD has taken over the market and are made in a wider range of sizes than plasma screens. The sweet spot targeted by LCD manufacturers is 42 to 50 inches.
The viewing angle of both is similar. The However, the image quality of a plasma TV is good when viewed off to the side; whereas an LCD TV will lose contrast or brightnessand colour accuracy.<ref>http://www.cnet.com/news/led-lcd-vs-oled-vs-plasma/</ref> <ref>http://www.displaymate.com/LCD_Plasma_ShootOut.htm</ref> This is an important consideration in a salon with fixed furniture. If you have a wide viewing area plasma will give a better experience. But overall, LCDs are up to four times brighter, so better for daytime viewing.
== Colour Saturation ==
Colour accuracy is an extremely complex subject, and impossible to gauge in a store. Absolute color and gray scale accuracy is necessary to display digital photos on your TV. Colour accuracy is intertwined with many other factors, including brightness and viewing angle. Overall, considering colour accuracy combined with viewing angle, plasma is much better.<ref>http://www.displaymate.com/LCD_Plasma_ShootOut.htm</ref>
== Connectors ==
TV connectors have evolved many types. For HDTV the main types are HDMI and USB. More is better. Older types that may be found are component video, S-video, RF or coaxial cable, and separate audio connectors.<ref>http://support.hp.com/us-en/document/c00396708</ref>
=== HDMI ===
A High-Definition Multimedia Interface (HDMI) connection is the go-to connector on a HDTV for high-definition digital video and audio signals. Maximum cable runs are 16 feet (5 meters).
HDMI is compatible with DVI video. You may need an HDMI-to-DVI adapter plug if your source device only has a DVI connector (but you must connect audio separately). HDMI supports High-bandwidth Digital Content Protection (HDCP).
=== USB ===
A universal serial bus ([https://en.wikipedia.org/wiki/USB USB]) connector standardizes the connection of keyboards, pointing devices, digital cameras, printers, portable media players, disk drives and network adapter) to personal computers and HDTV, both to communicate and to supply electric power.
An example use is to display digital photos on the TV, or to provide power to a streaming media device such as an [http://www.apple.com/tv/ Apple TV], [https://www.google.com/intl/en_ca/chromecast/ Google Chromecast] or [https://www.roku.com/ Roku] stick.
== Energy Consumption ==