31-07-2012, 03:26 PM
Organic LED Displays (OLEDs)
Organic_LED_Displays.pdf (Size: 330.27 KB / Downloads: 83)
Wouldn't you like to be able to read off the screen of your laptop in direct sunlight? Your mobile phone
battery to last much, much longer? Or your next flat screen TV to be less expensive, much flatter, and even
flexible? Thanks to a breakthrough technology called Organic Displays, this could soon be reality.
Although the technology behind Organic LED (OLED) displays is pure chemistry, the applications are much
more everyday - mobile telephone and television screens, laptop and stereo displays, car navigation systems,
or even billboards.
This OLED technology is based on a revolutionary discovery that light-emitting, fast switching diodes could
be made from polymers as well as from semiconductors. Starting from a standard LCD glass covered with
structured ITO (Indium-Tin-Oxide), the polymer materials are applied by precision ink jet printing. Using this
technology, pixels of red, green, and blue material are applied. After the patterned cathode has been applied
via metal evaporation, the cell is sealed.
Philips states that the big advantage of the manufacturing process is its simplicity and therefore its potential
for low cost; only a very limited number of process steps are needed. This procedure requires fewer
manufacturing steps than the manufacturing of LCDs, and, more importantly, fewer materials are used. In
fact, the whole display can be built on one sheet of glass or plastic, so it should be cheaper to manufacture.
Philips' thin-film PolyLED technology will enable the production of full-color displays less than 1 mm thick.
Combined with a large viewing angle, high brightness and contrast, and full video capability, PolyLED
displays are ideal for the next generation of information displays.
Advantages of Plastic Electronics
One big advantage of plastic electronics is that there is virtually no restriction on size. Conventional
semiconductor components have become smaller and smaller over the course of time. Silicon is the base
material of all microelectronics and is eminently suited for this purpose. However, the making of larger
components is difficult and therefore costly. The silicon in semiconductor components has to be mono
crystalline: it has to have a very pure crystal form without defects in the crystal structure. This is achieved by
allowing melted silicon to crystallize under precisely controlled conditions. The larger the crystal, the more
problematic this process is. Plastic does not have any of these problems, so that semi-conducting plastics are
paving the way for larger semiconductor components.
Philips and PolyLed
Since the discovery of polymer-based light emitting diode (LED) in 1989, Philips has been working on
PolyLED. Today, Philips is the first to ship monochrome PolyLED displays in mass production. Philips
Research is now concentrating on the development of PolyLED technologies for next-generation full-color
displays and on ways of integrating PolyLEDs into flexible displays.
State-of-the-art
Launched in September 2002, the Sensotec Philishave is the first ever product equipped with a display based
on superior PolyLED technology and is prominently featured in the latest James Bond movie, Die Another
Day.
In 2002, SANYO, Kodak, and SKD shipped 300 OLED displays for trial use in mobile phones. In order to
increase production of low temperature poly-silicon TFT LCD displays, the demand for which currently
exceeds capacity and in order to establish a mass production infrastructure required for full scale mass
production startup of OLED displays, a factory of Tottori SANYO Co., Ltd. was placed under the control of
SANYO LCD Engineering Co., Ltd. in February of 2003. The manufacturing line used for the production of
amorphous silicon TFT displays is was shifted over to the production of low temperature poly-silicon TFT
displays. Production of Low temperature poly-silicon TFT displays on the converted line began in April of
2003.
Organic_LED_Displays.pdf (Size: 330.27 KB / Downloads: 83)
Wouldn't you like to be able to read off the screen of your laptop in direct sunlight? Your mobile phone
battery to last much, much longer? Or your next flat screen TV to be less expensive, much flatter, and even
flexible? Thanks to a breakthrough technology called Organic Displays, this could soon be reality.
Although the technology behind Organic LED (OLED) displays is pure chemistry, the applications are much
more everyday - mobile telephone and television screens, laptop and stereo displays, car navigation systems,
or even billboards.
This OLED technology is based on a revolutionary discovery that light-emitting, fast switching diodes could
be made from polymers as well as from semiconductors. Starting from a standard LCD glass covered with
structured ITO (Indium-Tin-Oxide), the polymer materials are applied by precision ink jet printing. Using this
technology, pixels of red, green, and blue material are applied. After the patterned cathode has been applied
via metal evaporation, the cell is sealed.
Philips states that the big advantage of the manufacturing process is its simplicity and therefore its potential
for low cost; only a very limited number of process steps are needed. This procedure requires fewer
manufacturing steps than the manufacturing of LCDs, and, more importantly, fewer materials are used. In
fact, the whole display can be built on one sheet of glass or plastic, so it should be cheaper to manufacture.
Philips' thin-film PolyLED technology will enable the production of full-color displays less than 1 mm thick.
Combined with a large viewing angle, high brightness and contrast, and full video capability, PolyLED
displays are ideal for the next generation of information displays.
Advantages of Plastic Electronics
One big advantage of plastic electronics is that there is virtually no restriction on size. Conventional
semiconductor components have become smaller and smaller over the course of time. Silicon is the base
material of all microelectronics and is eminently suited for this purpose. However, the making of larger
components is difficult and therefore costly. The silicon in semiconductor components has to be mono
crystalline: it has to have a very pure crystal form without defects in the crystal structure. This is achieved by
allowing melted silicon to crystallize under precisely controlled conditions. The larger the crystal, the more
problematic this process is. Plastic does not have any of these problems, so that semi-conducting plastics are
paving the way for larger semiconductor components.
Philips and PolyLed
Since the discovery of polymer-based light emitting diode (LED) in 1989, Philips has been working on
PolyLED. Today, Philips is the first to ship monochrome PolyLED displays in mass production. Philips
Research is now concentrating on the development of PolyLED technologies for next-generation full-color
displays and on ways of integrating PolyLEDs into flexible displays.
State-of-the-art
Launched in September 2002, the Sensotec Philishave is the first ever product equipped with a display based
on superior PolyLED technology and is prominently featured in the latest James Bond movie, Die Another
Day.
In 2002, SANYO, Kodak, and SKD shipped 300 OLED displays for trial use in mobile phones. In order to
increase production of low temperature poly-silicon TFT LCD displays, the demand for which currently
exceeds capacity and in order to establish a mass production infrastructure required for full scale mass
production startup of OLED displays, a factory of Tottori SANYO Co., Ltd. was placed under the control of
SANYO LCD Engineering Co., Ltd. in February of 2003. The manufacturing line used for the production of
amorphous silicon TFT displays is was shifted over to the production of low temperature poly-silicon TFT
displays. Production of Low temperature poly-silicon TFT displays on the converted line began in April of
2003.