FCC standards for HDTV broadcast will have a major influence. The amount of information to be digested can be intimidating, even for professionals. The old hardware becomes obsolete, but are converted to the new signal from a tuner, if you get the signal from a VHF / UHF. If you have a cable TV or satellite, this care will be taken over by the service provider.

However, this could be a good time to upgrade the hardware. The new standard offers a mucha better image. In today's world of digital projectors, LCD, LCOS, DLP and plasma, the four different types of televisions, the HDTV market is dominated. Each has unique advantages over the other. Some plasma and LCD screens can be wall mounted, although polls that few people know how to wall mount. DLP and LCOS devices and some of the LCD projector are both technologies. Retro-projector units are usually the cheapest. TheSize of some systems is now less than 12 inches deep.

Quality video or on the best projectors now exceeds that in a commercial cinema.

Plant types:

TV or conventional: as a direct view of the image is displayed on a CRT (Cathode Ray Tube).
LCD (Liquid Crystal Display) and plasma TVs can also look directly at you. The LCD and plasma TV systems are "flat" units.
Rear projection TV (RPTV) using aCombination of mirrors and lenses to project the image from behind the screen. This allows the image that appears to be considerably larger, up to 70 inches or more. This technique usually offers the best value (cost against the image size).
or front projection TV (FPTV) is like a cinema. The image is projected forward to an external monitor. But as a movie theater, a very dark room is necessary because the screen does not reflect light in the room. This technique is usually more expensive than rear projection, but the space (the area consumed by the equipment) system is smaller.

Display techniques:

CRT (Cathode Ray Tube):

The established standard for television shows, good price, the quality of the image. The maximum size of the screen is smaller with technology. The technology is still a good choice in which the small picture you want, and volume is not a concern.

Liquid Crystal Display (> LCD)

Slim, but has problems with the representation of moving images (sports), the images tend to strip. These projectors usually contain three separate LCD glass panels, one for the components red, green and blue image projected. Since the non-color of the light let through the LCD panels, individual picture elements (pixels) will be opened to allow light to pass through the closure or to block the light. This creates the image that is projected onto theScreen.

Historically, set the LCD had a problem with pixilation visible. This is less evident on the new devices with higher resolutions.

Most systems use an LCD fluorescent backlight to shine through the LCD screen. This type of backlight must be replaced every few years. Some manufacturers are introducing sets with LED backlighting, with 10 times more durable. Although the cost may be, can make the cost advantage of this propertyDesigning a look.

Pros:
or a better color saturation, and more rich and vibrant
or rather the image clearer, important text
or increased energy efficiency

Disadvantages:
Or poor black levels and contrast
Problems or the display of moving images (sports)
or LCD panels (mainly in the blue channel) can worsen, leading to changes in color balance
or visible pixelation

Liquid Crystal on Silicon (LCOS)

A type of LCD technology, LCOS uses liquidCrystal-project as a mirror (usually rear projection) image on the screen. LCOS is a good value compared to plasma and LCD sets, but expensive compared to all other technologies such as DLP rear projection TV. This technique uses a DLP chip (see below), but the chip is coated with liquid crystals, which reflects the image seen on screen. LCOS systems allow a higher resolution than an LCD or a plasmadisplay.

Pros:
or Sharp, vivid colors and deep blacks
o There is no change slowly over time, since plasma is a series

Disadvantages:
or dead pixels is usually because the technology is in part reflective
or high maintenance costs: LCOS requires frequent changes in requirements bulb (somewhere between 6,000 and 8,000 hours, about 3-4 years with normal use), compared with 50,000 or more for most LCD or plasma. A replacement bulb costs about $ 400
orReproducibility: The picture quality can vary greatly from machine to machine

Digital Light Processor (DLP):

The DLP is a Texas Instruments product that is manufactured in Korea. It uses a chip with lots of mirrors (may be more than a million mirrors on a chip about one centimeter square), which are mechanically controlled by the right color can reflect. This technology provides excellent visualization, at a reasonable price.

In the best DLP projectors, like those in use at your local filmsTheatre, there are three separate mirror chips, one each for red, green and blue. But it is marketed in DLP projectors for the masses, there is a single chip. In these sets to define the color, there is a color wheel that consists of filters red, green and blue. The wheel spins between the lamp and the DLP chip and alternates the color of the light hitting the chip.

The spinning color wheel are used to project the image can produce a well-known problem on the screen as the rainbowEffect, separate the different colors in red, green and blue. At any time, the image on the screen is red or green or blue, and the technique is based on your eyes can not detect the rapid changes from one to another. However, some people just can not see the colors separate, but the rapid succession of colors may be responsible for cases of eyestrain and headaches. But the vast majority of people can not see the rainbowEffect.

Newer devices have doubled the speed of the color wheel. In addition, the new set of use (instead of a segment-3), six-segment color wheel, which has two sequences of red, green and blue. Since the wheel at double speed, and because the colors are red, green and blue seen him twice in every revolution, the effect of quadrupling the speed. This eliminates the visibility of the rainbow for most people who have seen the previous effect.

Samsung and other companies haveintroduced DLP sets with LED lights and color wheel. The lights in the older designs have replaced every few years. The LED should light on the life of television.

LaserVue (Mitsubishi) is now introduced in the United States in time for the holiday shopping season. LaserVue is a DLP (Texas Instruments Dark Chip '4 'Digital Light Processor) that eliminates the traditional incandescent bulbs and replaced it with a solid-state lasers. The performance of the video is excellent,but the technology costs about $ 7,000 for a 65 "HDTV. can the reliability / durability improvement have been better, but there are few data on this new argon ion laser A laser that would be expected to provide a duration of 8000 hours ( 5 -6 years of normal use) have. The Mitsubishi LaserVue is a laser system made by Arasor, an Australian company starting from lithium niobate (PPKN). Mitsubishi is conducting accelerated stress tests, but has not published any results. AHDTV LaserVue draws under 200 watts of power. That's about half of comparable LCD HDTV, and less than a third of a high-definition plasma.

Pros:
or small
-or contrast with deep black levels
or cheap

Disadvantages:
Less bright images or
or rainbow effect
or high maintenance costs: DLP requires frequent changes in requirements bulb (somewhere between 6,000 and 8,000 hours, about 3-4 years with normal use)compared to 50,000 or more for most LCD or plasma. A replacement bulb costs about $ 300 - $ 400 Samsung held lamps with LED lighting. The LED should not be replaced.

Plasma Display:

Slim, high contrast rating, sizes up to 60 inches or more, displays some limitations: expensive, old systems were (preserved in time, a reminder of what was projected), a high risk of burn-in, this could be a problem for those who play video games or aswatch movies recorded. If the tape or pause the game for too long, could affect the image on the screen.

Pros:
Outstanding image quality, or: It may take up to 8.6 billion colors, accurate color reproduction and wide viewing angle
screen size or larger, some plasma TVs are made in screen sizes up to 100 cm wingspan
or your life: Plasma TVs are even for their lifetime of 60,000 hours and large knownContrast (deep blacks)
or significantly less than LCD

Disadvantages:
o The displays are bulky, heavy and fragile
or Burn-in
or degrade slowly over time
o Energy inefficient

Coming Soon: OLED (Organic Light Emitting Diode) HDTV sets are now available, but there will be some years before that deserve serious consideration. An OLED is less than 1 "thick. OLED is already used in digital cameras and mobile phones with small plates, because thetheir energy efficiency, which is important in mobile devices.

STANDARD:

or NTSC analog TV or standard definition TV (SDTV): The current system is so out of dispersion (National Television Systems Committee).
or EDTV (Enhanced Digital Television). In fact, high-end standard-definition TV While these rates may be better set of standards, the picture quality of HDTV is not the same Technically, there is little difference between an SDTV and HDTV (with the exception ofhigher price).
or ATSC digital TV: This is the new system (Advanced Television Systems Committee), not necessarily high definition.
or HDTV: Digital TV is where the image is a wide-screen picture with many times more detailed current analog television pictures included. Most consumers see a huge improvement in image quality. HDTV has better picture quality than SDTV, because it has more lines of resolution. The image is of twoto five times sharper because the gaps between the scan lines are narrower.

SUMMARY

Each of the four technologies can be a good choice. The competition is intense, and improving all the technologies. The purchase of a TV will never be as easy as it was before HDTV, but the benefits may be worth the headache.

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