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 betterImage. 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. The size of some systems is now less than12 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): Uses a combination of mirrors and lenses to project the image ofreturn to 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 theFootprint (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)
Problems slim design, but with the representation of moving images (sports), the imagestend 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 on the screen.
Historically, set the LCD had a problem with pixilation visible. This is less evident on the new devices with higher screen resolutionResolutions.
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 of ownership for the benefit of this design worth a look.
Pros:
or a better color saturation, and more rich and vibrant
or rather the image clearer, important text
o More energyefficient
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 uses mirrors instead of Project LCOS (liquid crystal rear projection usually) the image on the screen. LCOS is a good value compared to plasma and LCD sets, but expensive compared to allother 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 plasma screen.
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 usually happens because the technologypartially reflecting
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
and Repeatability: 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 (maymore than one million mirrors on a chip about an inch 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 cinema, there are three 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 wheelfilters consisting of 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 an isolated problem on the screen as the rainbow effect of different colors red, green and blue is known. At any time, the image on the screen is red or green or blue, and the technique is based on your eyes are not able to quickly locateChange 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 rainbow effect.
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 whyred, 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 DLP sets with LED lights and color wheel are introduced. The lights in the older designs have replaced every few years. The LED should light on the life of television.
LaserVue (Mitsubishi) is introduced in the U.S.now time for Christmas. 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 is required to have a about 8000 hours duration (5-6 years of normalUse). The Mitsubishi LaserVue is a laser system Arasor, an Australian company to start from lithium niobate (PPKN) were made. Mitsubishi is currently conducting accelerated stress tests, but has not published any results. An HDTV 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
Good orValue
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 with 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, size up to 60 inches orIn addition, some display 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 watch films with adhesive as the installation. 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: someUnits of plasma TVs are now made of screen sizes up to 100 cm wingspan
or your life: Plasma TVs are also for their long life of 60,000 hours and a high contrast (deep black) known
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 will be aa few 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, thanks to their energy efficiency, which is important for portable 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 TV): In fact, high-end standard-definition TV: In the course of thismaybe it's better that defines standards, image quality is not the same as HDTV. Technically, there is little difference between SDTV and HDTV (except for the highest 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 hugeImprove image quality. HDTV has better picture quality than SDTV, because it has more lines of resolution. The image is two minutes to 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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Price : $255.99
