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OLED Display

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Inteltronic is friendly to small business and owners. Wisechip known as Univision in Taiwan was heavily invested by the Wahlee Group. We are here to service our customers' needs. We offer a full range of monochrome and full color OLED displays sizes from 0.66" up to 5.5". Demo videos available online.


Inteltronic certified ISO/TS16949 OLED displays for your projects:a

* Self-emmissive, no backlight required

* Super light in weight and thin (1 ~ 2mm)

*Low Power consumption: 2.8 - 3.6V

*High brightness(100 cd/m2)

* Superb contrast ratio (>2000:1)

* Fast response speed (at +25℃10μsec)

* Wide storage temperatures: Typical -40℃~80℃

* Wide operation temperatures:-30℃~70℃

* Super viewing angle (over 160 degrees)

* Low starting power (3 ~ 9V) and power-saving

* Excellent readability indoor as well as outdoor 

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  Full Color OLED Demo

 

 Razor sharp images compare to the conventional technologies:

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For the safety at the workplace, Inteltronic OLED displays provide sharp readings and wider operation temperatures to meet your toughest requirements and applications:

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             2000:1 ~ 10000:1                                                  160 Degree                                    0 Backlight    


               - 40 ~ 80                                                            10 ~ 30 mA                                10 μsec   


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Inteltronic OLED evaluation kit set available:a

Inteltronic's OLED evaluation kit set is a user friendly kit that helps you to start your chosen OLED right away.

 
*The OLED display panel
*Evaluation board
*Use leading wire to connect EVK with your system

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OLED displays gives your product the ultimate crystal clear readings

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Lighting principles of OLED:
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The basic structure of OLED uses thin and transparent indium tin oxide (ITO) with semiconductor properties as the anode with a metallic cathode to sandwich the organic material layer. The organic material layer includes the hole transport layer (HTL), emissive layer (EL), and the electron transport layer (ETL). When the battery provides suitable voltage (characteristics of low voltage), and electrical charges combine in the anode hole and the cathode at the emissive layer, it elicits electroluminescence in the organic material. The framework of the organic layer and selection and design of the anode and cathode are keys to light emission by OLED devices.

Source: howstuffworks

 

What is OLED?

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Organic Light-Emitting Diodes (OLED) display, also referred to as Organic Electroluminescence (OEL) display, is light-emitting diode (LED) whose emissive electroluminescent layer is composed of a film of organic compounds. There is a great scientific and commercial interest in this new OLED technology because they make color displays cheaper, sharper, thinner, and mechanically more flexible in consumer devices such as cell phones, personal digital assistants, and car dashboards. OLED technology also uses significantly less energy than current electronic displys, enabling loger battery life and increased usefulness of the products.

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  Schematic of a bilayer OLED   Typical OLED Structure

1. Cathode (−)

2. Emissive Layer

3. Emission of radiation

4. Conductive Layer

5. Anode (+)

 

 

     
 




Small Molecules:

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Efficient OLEDs using small molecules were first developed by Dr. Ching W. Tang et al. at Eastman Kodak. The term OLED traditionally refers specifically to this type of device, though the term SM-OLED is also in use.

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Molecules commonly used in OLEDs include organometallic chelates (for example Alq3, used in the organic light-emitting device reported by Tang et al.), fluorescent and phosphorescent dyes and conjugated dendrimers. A number of materials are used for their charge transport properties, for example triphenylamine and derivatives are commonly used as materials for hole transport layers. Fluorescent dyes can be chosen to obtain light emission at different wavelengths, and compounds such as perylene, rubrene and quinacridone derivatives are often used. Alq3 has been used as a green emitter, electron transport material and as a host for yellow and red emitting dyes.

The production of small molecule devices and displays usually involves thermal evaporation in a vacuum. This makes the production process more expensive and of limited use for large-area devices than other processing techniques. However, contrary to polymer-based devices, the vacuum deposition process enables the formation of well controlled, homogeneous films, and the construction of very complex multi-layer structures. This high flexibility in layer design, enabling distinct charge transport and charge blocking layers to be formed, is the main reason for the high efficiencies of the small molecule OLEDs.      

 


Alq3 commonly used in small molecule OLEDs

PMOLED vs AMOLED - what's the difference?

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There are two types of OLEDs used in displays - PMOLED and AMOLED. The difference is in the driving electronics - it can be either Passive Matrix (PM) or Active Matrix (AM).

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With Passive-Matrix OLEDs, the display is controlled by switching on rows and columns. When you turn on row number x and column number y, the pixel at the intersection is lit - and emits light. Each time you can choose just one pixel to light. So you have to turn these on and off very quickly. You do so in a certain sequence, and create the desired image. This is somewhat like the interlace-system used in old CRTs, but the control is done pixel-by-pixel. PMOLEDs are very easy and cheap to build, but they are limited to small sizes (up to 5", typically).


Source: howstuffworks

AMOLEDs have a different driver electronics - each pixel is controlled directly. AMOLEDs are more expensive, and much more difficult to create, but can be used for larger displays (current prototypes are up to 40") and are very power efficient.

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The first OLED products in the market used PMOLEDs - these were MP3 players, sub-displays on cellphones and radio decks for automobiles. The displays were small and usually with just one or two colors. When AMOLED panels started to emerge in 2007 and 2008 we have seen these larger displays in mobile video players, digital cameras, mobile phones main displays and even OLED TVs.

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PMOLEDs are still very popular - there are more MP3 player sold today with PMOLED than with LCDs.

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