IGNIS has developed technologies to push the conventional manufacturing techniques to >300 pixels per inch (ppi) AMOLED with true RGB pixels. Also, it has developed pixel circuit and driving scheme to compensate for the non-uniformity and enhance the lifetime of such a high-ppi display. These technologies can make AMOLED displays with similar resolution as IPS displays but with much better colour quality, higher contrast ratio, and wider viewing angle.
The major issue with AMOLED is the reflectivity which mandates the use of circular polarizer (reducing the OLED efficiency by 57%). IGNIS has developed a technique that not only removes the need for polarizer but also, the display acts as power scavenging device, touch screen, and self-calibration unit for non-uniformity/aging. Also, the manufacturing steps are not altered which results in the same yield and cost as normal AMOLED display with no-touch capabilities. IGNIS believes that this is a significant move toward adapting AMOLED display for tablet computers.
More news on the recent announcement with RiTDisplay, regarding the amorphous silicon AMOLED display using IGNIS’s AdMo™ technology. www.engadget.com/2011/06/02/ritdisplay-begins-producing-inexpensive-a-si-amoled-displays-for
Kitchener, Canada – May 18, 2011 – IGNIS announces a 3.47” 320 × 480 pixel AMOLED display, manufactured by RiTdisplay Corporation, and built with IGNIS patented AdMo™ compensation technology which makes the display more stable and more uniform. The display is ideal for mobile phones and other portable applications that require the bright image, rich colours, ultra-high contrast, and lower power of an AMOLED display. IGNIS and RiTdisplay will be demonstrating the product at booth #728 at SID Display Week 2011, from May 16-20 in Los Angeles. Until now, all AMOLED displays have been made with polysilicon backplanes, a higher-cost material. However, amorphous silicon is an attractive material for AMOLED since it’s used to make most of the world’s LCD displays. Compared to polysilicon it’s highly uniform, less expensive, and represents 95% of the world’s manufacturing capacity for displays. It was previously thought that amorphous silicon backplanes were unsuitable for OLED due to stability problems; however IGNIS technology has solved the stability problems, paving the way for this first product. “The performance is equivalent to polysilicon AMOLED. The product also incorporates IGNIS’ latest all-in-one driver chip for amorphous silicon AMOLED, which is the first of its kind in today’s AMOLED market,” says Paul Arsenault, President & CEO. “This opens the door for RiTdisplay and other…
One of the problems with some AMOLED backplanes is short-term image sticking. If a user puts an image on the display and leaves it on for a minute or so, then tries to change the image, the original image will be “stuck” for several seconds. This is due to a hysteresis effect in the TFTs (thin-film transistors). We’ve made some videos of an AMOLED display with MaxLife™ technology, at various temperatures, showing no hysteresis effect. View the videos on YouTube.