Edzer Huitema

A flexible 240/spl times/320-pixel display with integrated row drivers manufactured in organic electronics

Rollable electrophoretic displays with an active-matrix backplane are an emerging application of organic electronics. Integrating row shift registers on the display backplane reduces the number of interconnects and the footprint. Stand-alone shift registers using organic electronics on a flexible substrate are designed, realized, and characterized. The circuit contains 240 stages and has over 4000 transistors. Furthermore, a 240-stage shift register is integrated with a QVGA active-matrix display.

Flexible electronic‐paper active‐matrix displays

A QVGA active-matrix backplane was produced on a 25-um thin plastic substrate. A four-mask photolithographic process was used. The insulator layer and the semiconductor layer were organic material processed from solution. This backplane was a combination of the electrophoretic display effects supplied by SiPix and E-Ink Corp., resulting in electronic-paper displays with a thickness of 150 and 100 um, respectively; this is the worlds thinnest active-matrix display ever made.

16.1: Robust Flexible LCDs with Paintable Technology

In this article the second-generation liquid crystal displays (LCDs) made by the Paintable LCD technology is presented. With this technology LCDs are manufactured by a sequence of simple coating and UV curing processes. Since the process can be carried out on plastic substrates and the stack of optical layers is only tens of micrometers thick, the resulting LCDs are ultra-thin and flexible.

Polymer-based transistors used as pixel switches in active-matrix displays

— A 2-in. active-matrix display was demonstrated, containing 4096 solution-processed polymer-based transistors. By using the polymer-dispersed liquid-crystal display (LCD) effect, this results in a reflective, low-power display with paper-like contrast. The influence of the transistor parameters on the display performance is analyzed by use of a model for charging and discharging of the pixel capacitors. Good agreement was obtained between the model and the experimental data. Scaling behavior allows estimation of the performance required for transistors in a quarter-VGA display. These requirements are met by solution-processed pentacene transistors.

Plastic transistors in active-matrix displays

An active-matrix display driven by a pixel circuit with polymer-based thin film transistors is demonstrated. The circuit contains 4096 solution-processed plastic transistors, which is among the largest organic circuits reported to date. The relation between the transistor parameters such as mobility and leakage current to the display performance is analyzed.

Robust flexible LCDs with paintable technology

In this article, second-generation liquid-crystal displays (LCDs) made by Paintable LCD technology is presented. With this technology, LCDs are manufactured by a sequence of simple coating and UV curing processes. Since the process can be carried out on plastic substrates and the stack of optical layers is only tens of micrometers thick, the resulting LCDs are ultra-thin and flexible.

10.3: Invited Paper: Rollable Displays: From Concept to Manufacturing

Rollable displays enable large displays in small mobile devices. A rollable QVGA display is presented that is integrated into a pocketable e-reader product. On top of that a 254ppi monochrome and a 130ppi color display are presented that are rollable to a radius of 6mm.

60.4: Invited Paper: Rollable Displays — A Technology Development Enabling Breakthrough Mobile Devices

A Rollable Display has been developed that can be rolled to a radius of 7.5mm (0.3inch). The display is of the active-matrix electrophoretic type, based on organic electronics. The display is integrated into a novel mobile device that is ready for commercial launch. The device merges the mobile phone platform and form factor with the abilities of an e-reader.

A flexible, organic QVGA display with gray-scale capability

A flexible 4.7-in. QVGA active-matrix display was demonstrated, containing 76,800 solution-processed organic transistors. The combination of our plastic active-matrix backplane with electrophoretic-ink display material developed by E-Ink resulted in a reflective low-power display with paper-like appearance. By using high-performance organic transistors, it was possible to generate 2-bit images on the display. The display can be bent to a radius below 2 cm.