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R.K.UNIVERSITY
SCHOOL OF DIPLOMA STUDIES
 The LED TV is a more advanced version of the
LCD TV. While both types of TV on LCD
technology and have flat-panel design...
 A LCD screen is composed of 2 parts, the actual
liquid crystal display and a light source at the
back of the screen (cal...
There are 2 main types of backlights used
in LCD screens.
1. CCFL
2. LED
LCD stands for Liquid Crystal Display. An
LCD TV has liquid crystal between the
display panel of the TV, which gets
activ...
 When someone refers to a LCD TV, he usually refers
to a CCFL (cold-cathode fluorescent lamps)
backlighted LCD screen. Th...
It is important to note that…
LCD chips and pixels do not produce their
own light. In order for an LCD television to
pro...
LCDs with CCFL backlight are on their
way out of the market. Manufacturers are
now only producing them for their lower
en...
LCD stands for “liquid crystal display” and
technically, both LED and LCD TVs are
liquid crystal displays.
The basic tec...
LED, which stands for “light emitting
diodes,” differs from general LCD TVs in
that LCDs use fluorescent lights while LED...
 The difference in lights and in lighting
placement has generally meant that LED TVs
can be thinner than LCDs, although t...
This is the most common method for LED
TVs.
In an edge lit LED screen, the LEDs are
placed at the peripheral of the screen.
Depending on the television, it can be a...
This method is considered the best LED
backlight type, but can only be found on a
very limited number of models.
In a fu...
 A LED screen as normally referred is actually a LCD
screen, but instead of having a normal CCFL backlight,
it uses light...
Thank You
VIRENDRASINH VAGHELA
11SDSEC01018
Led tv by virendrasinh
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Led tv by virendrasinh

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Transcript of "Led tv by virendrasinh"

  1. 1. R.K.UNIVERSITY SCHOOL OF DIPLOMA STUDIES
  2. 2.  The LED TV is a more advanced version of the LCD TV. While both types of TV on LCD technology and have flat-panel designs.  "LED TVs are slimmer, brighter, and more detailed than your traditional LCD TV." LED TVs function by illuminating LCD panels with LED backlighting. However, not all LED TVs utilize the same type of LED backlighting.
  3. 3.  A LCD screen is composed of 2 parts, the actual liquid crystal display and a light source at the back of the screen (called backlight). A light diffuser is placed between the backlight and the LCD screen to uniform the source of light equally across the screen.
  4. 4. There are 2 main types of backlights used in LCD screens. 1. CCFL 2. LED
  5. 5. LCD stands for Liquid Crystal Display. An LCD TV has liquid crystal between the display panel of the TV, which gets activated when an electric current is supplied to it.
  6. 6.  When someone refers to a LCD TV, he usually refers to a CCFL (cold-cathode fluorescent lamps) backlighted LCD screen. This is how a normal LCD screen works. The backlight is a series of light tubes placed behind the screen. These tubes are very similar to the fluorescent lamp used almost everywhere, but smaller.
  7. 7. It is important to note that… LCD chips and pixels do not produce their own light. In order for an LCD television to produce a visible image on a TV screen the LCD's pixels have to be "backlight“.
  8. 8. LCDs with CCFL backlight are on their way out of the market. Manufacturers are now only producing them for their lower end and smaller models. They are getting replaced by LED TVs. They have the same screen but have LED lights instead of a CCFL tube for the backlight
  9. 9. LCD stands for “liquid crystal display” and technically, both LED and LCD TVs are liquid crystal displays. The basic technology is the same in that both television types have two layers of polarized glass through which the liquid crystals both block and pass light. So really, LED TVs are a subset of LCD TVs.
  10. 10. LED, which stands for “light emitting diodes,” differs from general LCD TVs in that LCDs use fluorescent lights while LEDs use those light emitting diodes. Also, the placement of the lights on an LED TV can different. The fluorescent lights in an LCD TV are always behind the screen. But, On an LED TV, the light emitting diodes can be placed either behind the screen or around its edges.
  11. 11.  The difference in lights and in lighting placement has generally meant that LED TVs can be thinner than LCDs, although this is starting to change.  It has also meant that LED TVs run with greater energy efficiency and can provide a clearer, better picture than the general LCD TVs.  Because of difference in lights and lightning placement there are two types 1. EDGE LIT 2. FULL ARRAY LIT
  12. 12. This is the most common method for LED TVs.
  13. 13. In an edge lit LED screen, the LEDs are placed at the peripheral of the screen. Depending on the television, it can be all around the screen or only on the sides or the bottom. This allows the screen to be very thin. However, it can cause some spots on the screen to be brighter than others, like the edges.
  14. 14. This method is considered the best LED backlight type, but can only be found on a very limited number of models. In a full array LED screen, the LEDs are distributed evenly behind the entire screen. This produces a more uniform backlight and it provides a more effective use of local dimming, where it can change the luminosity of only a specific part of the screen.
  15. 15.  A LED screen as normally referred is actually a LCD screen, but instead of having a normal CCFL backlight, it uses light-emitting diodes (LEDs) as a source of light behind the screen.  A LED is more energy efficient and a lot smaller than a CCFL, enabling a thinner television screen.  Marketing made a lot of fuss about LED TVs, but it is only the backlight is changing, so there is actually no picture quality improvement over a normal LCD screen. It is more of a natural improvement instead of a game changer. It is still a better backlight, so manufacturers are putting it on their best LCD panels, making it worth the upgrade.
  16. 16. Thank You VIRENDRASINH VAGHELA 11SDSEC01018
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