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Television Technologies
Several types of TV receivers each with upchecks down and controls:
CRT
Cathode Ray Tube is the standard of the older generation grew up watching. It 's like a big light bulb, the screen will end with fluorescent pixels and the other with an "electron gun", which, charged with electricity, emits electrons coated; electrons to illuminate the pixels, the pixels. Old CRT having a curved screen, but more recentThe models are "flat screen TV '- not to be confused with' flat-screen TV", the TV all is fine. Upchecks: It is well known, it is more convenient to buy and repair. CRT design of a very deep black. Down Controls: larger and heavier than others. If you put something in the neighborhood with a large magnet (like a large speaker) can affect the situation.
DLP TV
Digital Light Processing Projection TVs are, shine light through a color wheel on aSemiconductor with small mirrors. The light is reflected through a projection lens onto a large screen. Upchecks: incredibly clear images with clarity seamlessly in any format, brilliant images with dark colors, light weigh, very durable, and the heat, humidity and vibration affected. Down Controls: Available only in the big screen. A flat screen DLP TV, but they need more space than CRTs, because they sit down and require good ventilation to getWall. For a DLP TV wall mounting is not possible and not crisp text. They have a very hot light source lamp needs to cool properly or does not last as long as it should. The viewing angles are not as wide as the other species.
LCD TV
Liquid Crystal Display or LCD televisions have been used as computer monitors. They have small crystals embedded in the screen glow red, green or blue when hit by an electrical charge. By varying the chargevarying the intensity of color and diversity in which charging crystals vary in color. Upchecks: Images can be very strong and very bright. If the unit near a window, LCD TVs are less against the glare. LCD TVs are great for TV wall brackets. Down Controls: LCDs do not just pitch black, and if you want a really big screen, you will not find on a LCD flat screen TV.
Plasma TV
Plasma TVs are like a neon sign is controlled by a computer. Two glass platesMicrobubbles have neon and xenon, with each pixel. If this gas is excited by electric charges, are formed, the distribution of photons, which bring to light the pixels phosphorus. Upchecks: high resolution, a smooth, uniform image across the screen, plasma televisions can display billions of colors for a truly realistic image, a distortion-free wide viewing angle, a plasma TV is also quite lightweight for a wall mount TV. Controls at the bottom: the black levels are just fine ifLeft on the same image for too long, you may experience screen burn, which is to see the image of a permanent 'ghost' is (biggest problem with video games or TV movies), plasma TVs are heavier and more sensitive than LCD TVs of comparable size.
TV Features
Proportions
Two numbers describe how the screen width to screen height applies. Standard screen is 4:3, ie a screen resolution of 480i is 640x480 pixels. Panoramico is 16:9, then a screen 1080th1920x1080 pixels. Go Wide Screen, if you can - you'll thank us later.
Cable or Dish TV
When you subscribe to satellite TV or cable, contact your service provider, you get a satellite dish and decoder to decode the signals.
Subtitling
The text appears at the bottom of the screen to help the hearing impaired - to learn a language useful for those people - it is an integrated feature of most TV and DVD series.
Contrast Ratio
The differencebetween darker and lighter colors in the set can be shown that the higher the ratio, the better the image - 5000:1 is good, 10.000:1 is fabulous; 15,000:1 is good, very expensive!
HDTV compared to HD-ready TV
An HD-ready or HD monitor can not display high definition images when the signal is processed through an external HD tuner, before it goes into the crowd. A true HD television has a factory-installed HDReceiver.
Picture in Picture
A second image appears in a small corner of the TV screen so viewers can watch two programs simultaneously. The wife can watch her reality show, and man can play, or look back.
Response Time
The amount of time a pixel from black to white and vice versa. It 'like a camera shutter speed, the lower the number the faster, the better the image.
Screen Size
Why is a numberscreen sizes are measured diagonally convenient - a 32-inch LCD TV is a bit 'less than 28 cm wide x 16 cm high. It is difficult to believe that there is no such thing as too much TV (well, that's what they tell us). Movies and sports fans, especially, want the biggest TV screen you can get, but they also want to see the whole picture clear. Choose a screen that fits your environment. If you will be sitting 5-7 meters away, go up to 41 inches, 8-9 feet, up to 44 inches, 10-11 meters,up to 50 inches; 11-13 meters, up to 60 inches; 13-14 meters, up to 70 inches, about 15 meters, about 70 cm. Of course, really have not seen the opening of the first Star Wars
Film until it is seen sitting in a 5-inch 50-inch TV!
Mountains
Ideal for decorative systems clean - TV wall mounts you can hang the set on the wall like a painting. A couple of sentences with a TV wall, but most must be purchased separately. If you go this route, get a TV with a wide viewing angleSo you can see from the side and straight. Be sure to bring the TV support that securely and directly to the studs - flat-screen TV is not all that light. A shelf TV is another option, the Great Wall.
Final Thoughts: Buy a combo meal instead of a sandwich.
If you have a TV, it's probably a DVD or VCR or both. You can save money and storage space with a TV / DVD / VCR. You can choose TV-VCR, TV, VCR, DVR, etc. Whatever your choice of plateThese are especially good for dorms, apartments and other small spaces.
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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).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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