-ของเมืองนอก ค่อยๆแปลกันนะครับเขาเขียนค่อนข้างละเอียดดี่ครับ
Comparison Plasma televisions LCD televisions Front Projectors Advantage
Screen -ขนาดจอ ตอนนี้ทำได้ใหญ่พอๆ กันเลย แต่จอเล็ก มีแต่ lcd
Size Average screen sizes range from 32 inches to 63 inches (measured on the diagonal). Larger plasmas,
a 103 inch unit from Panasonic, are in production, but are still prohibitively expensive for consumer use. Panasonic has announced plans to release a 150-inch plasma display by 2010. Average screen sizes range from 13 inches to 65 inches (measured on the diagonal). As with plasma, there are larger LCD TVs made,
a 108 inch display which is to be released in later this year (2008) by Sharp, but they are not readily available or affordable at the consumer level. Typical screen sizes from as small as 40 inches to as large as 300 inches (measured on the diagonal). Projectors do not have a fixed image size so most projectors list their screen size as a range (i.e. 40-300 inches. Most buyers opt for sizes from 76-inches to 120-inches if they purchase a screen. Optimally the image should not be over 300-inches. Front projectors are able to create the largest images by far. Projectors are also the only option which is not a fixed size (meaning your screen size can change if desired) and projectors are also more portable than an LCD or Plasma. Plasma and LCD TVs are comparable in size now with the maximum sizes over 60-inches. Maximum recommended projector image sizes are around 300-inches.
Weight น.น Plasma จะหนักสุดครับ
Weight Plasma displays are fairly heavy, and may need additional supports to be mounted onto a wall. LCD TVs weigh less than comparably sized plasma TVs. Single chip DLP and 3LCD projectors typically weigh between 10 - 20 lbs. They can be shipped for less than an LCD or Plasma TV over 19-inches in most cases. Projectors are lighter and less bulky to ship and to install than an LCD or Plasma TV. Projection screens are bulky and large however. LCD TVs are second least heavy, followed by plasma.
Durability Plasmas are somewhat fragile making them tricky to ship and install. Unlike the commercials where plasmas are mounted on the ceiling, plasmas are best installed by a professional, and should be installed on a wall that can bear a good deal of weight. However, recent improvements to plasma screens have made them significantly more durable and lighter weight. Somewhat more durable than older plasmas. End users can easily mount an LCD TV themselves if desired, although LCD TVs should still be shipped with special care, and the screen itself should be cleaned with a streak free cleaner. Projection surfaces vary, but a wall or screen are obviously less fragile than an LCD or Plasma TV. Screens can be washed and walls can be repainted. The projector itself is also as durable as either a Plasma or LCD TV. A projector screen is durable and cleanable, and walls can be painted. Projectors are also very durrable. Because of this, projectors win this battle, with LCD TVs in second place, followed by plasma.
Shipping Due to their fragile nature, plasma TVs need to be shipped by specialty carriers. Overnight or fast delivery options are not recommended. Special shipping methods and their heavier weight add to higher shipping costs. Shipping LCD TVs is not difficult, and is not as expensive as shipping
Brightness /Contrast สี ดำ Plasma กินครับ contrast LCDs กินครับ
Plasma TVs report higher brightness and contrast levels than LCDs. Under ideal conditions (no ambient light) this is a true advantage of plasma technology, because LCD TVs are backlit and therefore light must be blocked to create blacks. Plasmas have individual pixels that either on or off, creating deeper blacks and better contrast. LCD TVs can often look better in 'real-world' situations. Plasmas are made with a special glass surface that can reflect light, which dulls the brightness and contrast of the image. LCD TVs reflect very little light, allowing them to maintain levels in well-lit rooms. Projectors now have contrast ratios of 50,000:1 and higher, making them nearly equal by specification to many LCD and plasma TVs. However, with ambient light in a room, contrast and brightness can be significantly impacted. For best contrast that rivals LCD and plasma, low light or no light environments are best. Different specifications are used to measure brightness in a projector, so it is difficult to compare directly. Just about any LCD TV or plasma will satisfy the expectations of most consumers need for brightness and contrast. Videophiles will look for the hightest contrast ratios and will likely ignore the brightness specs on an LCD or plasma TV. Newer home theater projectors (1000 ANSI lumens or brighter) should also satisfy in any controlled lighting environment. Projectors are not ideal for rooms with a lot of ambient light unless they have more than 2000 lumens of brightness.
ThicknessThickness As thin as 3 inches deep. As thin as 2 inches deep. Projectors are simply projecting light onto a surface, so on a screen or wall the image will not take up much space. The projector itself will need to be placed on a flat surface or mounted out of the way. The projected image is (obviously) very thin, and create a truly 'flat' image. LCDs TVs and plasma's are just about equal to each other in thickness (around 2-3 inches, and for most this is not an issue. But a projector is the solution that can be easily stored away out of site (using a retractable or portable screen).
