The first OLED TVs appeared in 2008 but four
years later, the first 55-inch models are available on the market.
The first OLED TV
from Sony has 11-inch size, now they are going to sell 55-inch OLED TV.
Sony manufacturer has
launched the first OLED TV with 11-inch product, which named XEL-1 OLED. Then is
LG with 23 and 32 inches model in the following years. However, in this year,
both Samsung and LG are preparing to launch the first and greatest 55-inch OLED
TVs, people feel more clearly about the potential of this new generation screen
technology.
In the last half year,
OLED has been the phrase mentioned many times in field of image and screen
production technology. This is the product that Korean government placed an
important role in their economy. This screen technology is the product that is
stolen and exchanged illegally between competing manufacturers. OLED TV is new generation
product of the future but the concept, structure or advantages and disadvantages
of this screen compared to LCD and Plasma are not well known.
Here are six basic things that users should
know about the TV screen using new technology.
OLED without LCD and Plasma backlight
Structure of OLED screen
generally includes back panel (Substrate) to shore the screen, pure Anode
layer, the organic layers including conductive layer and emissive layer, then the
above Cathote layer helps to create electrons when electricity goes through.
OLED’s full name is
Organic Light-Emiting Diode, it means the luminescent organic diode. While LCD
and plasma need backlight, OLED requires no backlight because its pixels can
emit light. LCD requires CCFL backlight (cold fluorescent) or LED, Plasma needs
UV lamp to burn phosphors, creating the basic RGB colors.
OLED has many advantages
OLED screen does not
use backlight so that it is very thin.
With the
self-emitting structure, OLED TV will be thinner, lighter, save more energy and
perform better than any older TV technology. Each pixel can emit light or help the
black representation reach perfect level, that’s why the screen contrast is
extremely high.
OLED is completely different from LED
OLED and LED have similar
operation mode but OLED TV and LED TV have completely different structure. LED
TV is a concept that TV manufacturers created, it is still LCD TV but using LED
lamp instead of CCFL of normal LCD TV. Meanwhile, OLED TV screen includes many pixels
that can illuminate. Thus, OLED screen is energy efficient than LCD, LED and
Plasma.
RGB OLED and White OLED
Pixel structure of White OLED screen
Current TV Technology
is divided into two main branches, RGB OLED and White OLED. RGB OLED TV
operates similar to plasma TV when each main pixel is divided into sub-pixel with
three colors: green, blue and red.
WhiteOLED is added a white
sub-pixel, its pixel structure is similar to pixel RGB OLED. With the addition,
the WhiteOLED screen brings brighter images. Besides, WhiteOLED screen is said
to have higher lifetime than RGB OLED, the ability to hold color is better and
is also consistent with more sizes. While RGB OLED is rated better on display
and saves more energy.
AMOLED is a form of OLED
Structure
of AMOLED
“AM” here means “Active Matrix” and is a
common structure in electronic circuits of the device. An AMOLED includes anode
layer, organic compound layer and the Cathode layer, the thin transistor film (TFT)
in between helps form a matrix of pixels.
TFT thin film layer
acts as an electrical circuit to determine which pixel will be turned on to
create the image. So that AMOLED brings good visibility, flexibility, it is
consistent with the motion pictures, fit on the screens of mobile phones,
computers or even TV. AMOLED is not different, it is a product of the OLED in
general.
OLED TV is expensive but it will be popular
LG and Samsung are about to launch 55-inch OLED TV on the
market.
Like any new
technology, the first OLED TVs will be very expensive. Do not forget that the big
size LCD and Plasma are very expensive before. With price is up to $8,000 for
the first 55-inch models, there will be only 1% of customers in general can own
the product. However, after a few years, OLED will become the main display
technology and pass through LED or Plasma, which is general movement trend of
the market.
We can see that OLED
is gradually dominate in the small size product lines, more smartphones, tablets
or video game screens use this technology, including Galaxy S III, One S or
Sony PlayStation Vita.
