2.7 Inch OLED Display LCD Displays Touch Panel

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OLED displays use organic materials that emit light when electricity is applied. OLEDs enable emissive, bright, thin, flexible, and efficient displays. OLEDs are set to replace LCDs in all display applications - from small displays to large TV sets.

PMOLED: Passive Matrix OLED

PMOLED stands for Passive-Matrix OLED, which relates to the way you control (or drive) the display. A PMOLED display uses a simple control scheme in which you control each row (or line) in the display sequentially (one at a time). PMOLED electronics do not contain a storage capacitor and so the pixels in each line are actually off most of the time. To compensate for this you need to use more voltage to make them brighter. If you have 10 lines, for example, you have to make the one line that is on 10 times as bright (the real number is less than 10, but that's the general idea).

So while PMOLEDs are easy (and cheap) to fabricate, they are not efficient and the OLED materials suffer from lower lifetime (due to the high voltage needed). PMOLED displays are also restricted in resolution and size (the more lines you have, the more voltage you have to use). PMOLED displays are usually small (up to 3" typically) and are used to display character data or small icons: they are being used in wearable devices, small gadgets, and sub displays.

PMOLED vs AMOLED

The other kind of OLED display is called an AMOLED (or Active-Matrix OLED). An AMOLED uses a TFT that contains a storage capacitor which maintains the line pixels lit all the time (even though just one line is changed each time). AMOLEDs consume less power than PMOLEDs, have faster refresh rates and allows to build larger display with higher resolutions. AMOLEDs are also more complicated and expensive to fabricate.

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AMOLEDs today are being used as displays for smartphones, digital cameras - and even OLED TVs.

Flexible and transparent PMOLEDs

Some small and simple flexible (conformable) PMOLED displays are already on the market. Japan's Futaba for example is producing several such displays, including a 1.4" 128x16 film PMOLED display adopted in several fitness bands from Garmin, HTC and others.

Transparent PMOLEDs are currently in development, with some segmented panels already on the market - but as of early 2018, no dot-matrix transparent PMOLEDs are available.

Looking for PMOLED suppliers?

Are you looking to adopt an PMOLED display for your device? Today there are several PMOLED producers (mostly in China and Taiwan), each making their own kinds of standard and custom PMOLED displays, with a total of dozens of different displays on the market.

The OLED Marketplace is our very own comprehensive OLED catalog, in which you can find most of the PMOLED displays on the market. Click here to browse our extensive catalog.

The PMOLED Market Report

If you want to fully understand the PMOLED market and industry, check out our PMOLED Market Report. This comprehensive report explains:

• PMOLED production fabs
• Next-generation PMOLED technologies
• Flexible and transparent PMOLEDs
• PMOLED for automotive applications

The report package also provides datasheets and product catalogs and a detailed list of PMOLED producers.

Further reading

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