Royole Corporation Presents Advanced Flexible Display Research Findings at SID’s Display Week

Royole Corporation presented five technical papers during the 2020 Display Week Symposium. 

Organized by The Society for Information Display (SID) and taking place online from Aug. 3-7, this virtual event featured presentations from those at the cutting edge of display technologies.

This year, Display Week 2020 hosted its first all-virtual event, bringing together the brightest minds in the display industry to provide insight into the latest advancements, showcasing new technologies and products that will be released in the next few years as well as giving a prominent platform for those making great strides in their respective fields of work.

Royole specializes in the creation of fully flexible displays and sensors and presented five separate research papers from the different areas of focus of the company as well as exploring the impact that this research will have on the future of this field of work. 

These papers reflect the influence that Royole has in the industry and the company’s role in continuing to push the boundaries of flexible technology. 

The company was behind the world’s first foldable smartphone with a flexible display when FlexPaiÒ was launched in 2018.

“Royole is a recognized innovator in flexible display technology,” said Sri Peruvemba, chair of marketing for SID. “Its technical papers were quite timely and were of considerable interest to Display Week attendees.”

OLED driving has evolved recently due to the demand for new product features. 

Royole’s first presented paper explores the Complementary Low-temperature Poly-Crystalline Silicon and Oxide (LTPO) technology, pixel circuits and integrated gate drivers for AMOLED displays supporting variable refresh rates. 

The second paper discusses the compact modeling of independent dual-gate TFTs and OLED for display panel circuit simulations. It presents a universal and comprehensive compact model for three and four-terminal thin-film transistors (TFTs). The DC and AC behaviors of TFTs with an independent bottom gate or light shield layer are modeled. 

With applications of flexible displays ever-expanding, in its third paper, Royole researched the general advancements in the development of flexible AMOLED displays and the possible innovations of the future, including module materials, power performance trade-offs, etc. 

Looking more deeply into the new form factors, the fourth technical paper investigates the mechanical effects of flexible displays. 

A series of finite element analysis (FEA) models have been established to study the mechanical effects in a flexible AMOLED display module, in scenarios of outward folding, rolling and ball drop, etc. 

The analysis is conducted to verify the validity of such models. Touch architecture and performance remain to be a challenging topic. Looking into this, the final paper from Royole focuses on the scalability of on-cell touch (OCT) for flexible AMOLEDs. 

OCT is an enabling technology for integrating the touch sensor on an AMOLED display. The modeling of OCT at a full-panel, end-to-end level is critical as it provides guidelines for process integration, sensor pattern and display panel design, as well as driving system design.