The FCC standard for HDTV is with a great effect. The amount of information to be digested can be daunting, even for professionals. The old hardware is not obsolete, but will need a tuner to convert the new signal, if you get the signal from an antenna VHF / UHF. If you have cable TV or satellite, which will be provided by the service provider.
However, this may be a good time to upgrade the hardware. The new standard offers anotherbest image. In today's world of digital projectors, LCD, LCoS, plasma and DLP are four different types of TVs that dominate the HDTV market. Each has unique advantages over the others. Plasma and some LCD screens can be mounted on the wall, even if investigations find that some people will mount on the wall. DLP and LCOS and LCD display are some of both technologies projector. Rear projection units are usually very inexpensive. TheSize of some systems is now less than 12 centimeters deep.
• Video quality on the best projectors now exceeds that in a traditional film business.
Types of implants:
• traditional television: as a direct point of view, the images displayed on a CRT (Cathode Ray Tube).
LCD (Liquid Crystal Display) and plasma TVs can also direct vision. The LCD and plasma TV systems are "flat-screen units.
• Projection TV(RPTV) using a combination of mirrors and lenses to focus the image on the screen behind the project. This allows the image appears to be significantly larger, up to 70 inches or more. This technique offers the best value in general (size vs. cost).
• Front-Projection TV (FPTV): This is like a cinema. The image is projected forward to an external monitor. But as a cinema is a very dark room necessary because the screen does not reflect light in the room.This technique is generally more expensive rear projection, but the footprint (the area consumed by the device) the system is smaller.
DISPLAY SPECIFICATIONS:
CRT (cathode ray tube):
The established standard for TV screens, good price, quality. The maximum size of the screen is smaller with technology. The technology is still a good choice when you want a smaller picture, and bulkiness is not relevant.
Liquid Crystal Display(LCD):
Slim, but has problems, the display of moving images (sports), tilt the images that appear on the strips. These projectors usually contain three separate LCD glass panels, one for red, green and blue, which is projected. Since the non-colored light through the LCD panel, the individual image elements (pixels) to be opened to allow light, or closed, blocking the light. This creates the image projectedScreen.
Historically, the LCD devices have had a problem with pixilation visible. This is less evident on newer devices, with higher resolutions.
Most systems use a fluorescent backlit LCD display, which shines through the LCD screen. This type of lighting should be replaced every few years. Some manufacturers are introducing LED-backlit display, with a 10 times longer life span. Although the initial cost may be more the cost of ownership can take advantage of thisDesign is worth a look.
Pro
• color saturation better, richer and more vibrant
• Improved image clearer, important for the text
• greater energy efficiency
Cons:
• little black level and contrast
• trouble viewing moving images (Sports)
• can lower LCD panels (mainly in the blue channel), leading to changes in color balance
• Visible pixelation
Liquid Crystal on Silicon (LCoS):
A type of LCD technology, LCOSA liquid crystal used instead) mirrors (usually back-projection image projected on the screen. LCOS is a good value compared to plasma and LCD sets, but expensive compared to other technologies such as rear projection DLP TV. This technique uses a DLP chip (see below) is set, the chip is coated with liquid crystals, reflects the image shown on the screen. LCOS based systems provide a higher resolution than an LCD or plasma –Display.
Pro
• Sharp, vivid colors and deep blacks
• It is slowly changing with the times, like a plasma can be considered
Cons:
• dead pixels occur in order, because the technique is partially reflective
• High cost of maintenance: LCOS requires frequent bulb changing needs (somewhere between 6000-8000 hours, about 3-4 years with normal use), compared with 50,000 or more for most LCD or plasma. A replacement lamp costs about $ 400
•Reproducibility: The image quality varies greatly from machine to machine
Digital Light Processor (DLP):
The DLP by Texas Instruments is a product that is manufactured in Korea. You use a chip that can (with more levels for more than a million mirrors on a chip about one centimeter square), which can be mechanically controlled to reflect the correct color. This technology provides excellent display at a moderate price.
In the best DLP projectors, like those in use at the local movieTheater, there are three different chip mirror, one each for red, green and blue channel. However, to be placed on the market for DLP projectors for the masses, there is only a single chip. In these sets, define the color, there is a color wheel that consists of red, green and blue filters. The wheel spins between the lamp and the DLP chip and alternates the color of light striking the chip.
The spinning wheel color used to rotate the image, which can be a problem on the screen production project known as the rainbowEffect, which separated in different colors are red, green and blue. At one point, the image on the screen red or green or blue, and the technique is based on the eyes, unable to recognize the rapid changes from one to another. However, not only some people can see, separate colors, but the rapid succession of colors may be responsible for the reported cases of eyestrain and headaches. But the vast majority of people can not see the rainbowEffect.
Recent rates have doubled in speed color wheel. Even the most recent series instead of using a six-segment color wheel (of a 3), which is two sequences of red, green and blue. Because the wheel at double speed, and because the red, green and blue seen twice in each rotation, the effect of an increase of four times the speed. This eliminates the visibility of rainbows for the majority of people who have seen above, the effect.
Samsung and other companies haveDLP sets introduced LED lamps and color wheel. Bulbs in the old structures should be replaced every few years. The LED bulb should be during the life of television.
LaserVue (Mitsubishi) is introduced in the United States, now in time for the holiday season. LaserVue is a DLP Dark Chip ('4 Texas Instruments' Digital Light Processor) that the standard bulb removed and replaced with a solid-state lasers. The performance of the video is excellent,but the technology will cost about 7,000 dollars for a 65 "HDTV. Reliability / improvement of life can be better, but there are few data about this new laser system. an argon laser is expected that a life of about 8000 hours (5 -6 years) of normal use. The Mitsubishi LaserVue uses a laser Arasor, an Australian company to launch lithium niobate (PPKN.) Mitsubishi is currently in progress to perform accelerated stress tests, but has not released results. AHDTV LaserVue draws under 200 watts of electricity. Which is about half of the LCD HDTV comparable, and less than one third of a plasma high definition.
Pro
• small package size
• high-contrast images with deep black levels
• Good value —
Cons:
• Less bright images
• Rainbow Effect
• High cost of maintenance: DLP requires frequent bulb changing needs (somewhere between 6000-8000 hours, about 3-4 yearsnormal use), compared with 50,000 or more for most LCD or plasma. A lamp replacement costs about $ 300 – $ 400 Samsung is equipped with LED lighting instead of lighting. The LED should not be replaced.
Plasma Display:
Thin-design, high contrast rating, size up to 60 inches or more, some limitations of display: expensive legacy systems have a high risk of burn-in (over time, a reminder that projected what is been maintained), this could be a problem for those who love to playSee video games or movies to record. If you put the tape on the game or pause too long, this could be the image on the screen.
Pro
• images of exceptional quality: It 'can store up to 8.6 billion colors, accurate color reproduction and wide viewing angles
• large screen sizes: Some plasma televisions are now produced in the range of screen sizes up to 100 cm
• Duration: Plasma TVs are known for their ability to extend the service life of 60,000Hours and good contrast (deep blacks)
• cheaper than LCD
Cons:
• The displays are very bulky, heavy and fragile
• Burn-in
• to increase slowly over time
• Energy Efficiency
Coming Soon: OLED (Organic Light Emitting Diode), HDTVs are now available, but will be a few years before its mandate seriously. An OLED is set to less than 1 mm in thickness. OLED is already in digital cameras and mobile phones for use withSmall plates, because of their efficiency, which is important for portable devices.
RULES:
• NTSC analog TV or standard definition TV (SDTV) is as follows: the current system, which arose vote (National Television Systems Committee).
• EDTV (Enhanced Digital TV): In fact, high-end standard-definition TV: While these rates may be better than standard sets, the image quality is not equal HDTV. Technically, there is little difference between a SDTV andan EDTV (except for the highest price).
• ATSC digital TV: This is the new system (Advanced Television Systems Committee), which is not necessarily high definition.
• HDTV digital television in which the image is a widescreen picture, often with more detail than is contained in current analog TV pictures. Most consumers will see a huge improvement in picture quality. HDTV has better picture quality than SDTV, because a greater number of linesResolution. The image is two to five times stronger, because the gap between scanning lines are narrower.
SUMMARY
Each of the four technologies can be a good choice. The competition is intense, and all the technology continues to improve. Buying a television will never be as easy as it was before HDTV, but the benefits can be the value of a headache.
Link : Top HDTV bestsellers
