Pervasive Displays’ EPDs benefit from Partial Update functionality while avoiding the ghosting issues

27 May 2021

Tainan City, Taiwan – 27 May 2021. Pervasive Displays, a recognized specialist in the development and supply of e-paper displays (EPDs), has added further value to its product offering through inclusion of new capabilities. The company has now integrated a next generation partial update feature into its EPDs, so that a broader range of customer application demands can be addressed. The driving waveforms used for these partial updates have been optimized to deliver superior image quality, outperforming what other EPD vendors are able to achieve.

In most EPD application scenarios, like electronic retail shelf labelling, a conventional global update will prove to be sufficient. Here every pixel on the EPD is refreshed, as there are no time pressures and this can be done when the EPD is not being viewed by anyone (such as when the store is closed). There are, however, certain applications that require rendered information to be refreshed at a quicker rate, while still being viewed – and this is why a partial update capability has major appeal. Using partial updates, rather than refreshing every pixel, the rendered information in a smaller section of the EPD can be refreshed. Changes can be implemented within a shorter time frame and there is even potential for simple animations to be displayed. Until now, the drawback of this has been that partial updates can often result in ghosting, where traces of the previous image remain present on the new image. This impacts on image quality and is clearly detrimental to the user experience. It may also reduce the EPD’s working lifespan.

Using Pervasive Displays’ advanced driving technology, the waveforms generated for partial updates are much more effective. Partial updates can take as little as 0.5 seconds to complete which is around a quarter of the time needed for a global update. However, ghosting issues are avoided and the EPD’s long-term operation is maintained.

“Thanks to the proprietary driver technology incorporated into our EPDs, we now have a game-changing differentiator to bring to the market,” states Charming Su, Senior VP at Pervasive Displays. “The partial update performance we can attain is far better than that of competing solutions, without the appearance of ghosting. As a result, our customers are always certain of getting exceptional user experiences.”

Reference: Fast and Partial Update introduction


About Pervasive Displays
Pervasive Displays designs, manufactures and markets e-paper displays for applications requiring high resolution, good readability and low power consumption. The company focuses on commercial and industrial applications including retail, logistics, healthcare, security and manufacturing. Its mature TFT, integrated circuit and e-paper platforms reduce risks and improve product value. Pervasive Displays simplifies the work of designers by providing both standard and custom displays and offering extensive technical support through an ecosystem of partners. Design resources include detailed product specifications, application notes, reference designs, source code and applications support. The company is based in Tainan City, Taiwan and Orinda, USA.