Jhih-Ping Lu

Ring-Edged Bank Array Made by Inkjet Printing for Color Filters

A mask-free inkjet printing (IJP) process has been developed to fabricate color filters. The coffee ring effect was used to create a ring-edged bank array with fine structures by IJP of poly(methylmethacrylate). After the color filtering inks were deposited in the banks, a color filter panel was made without any transitional photolithography process. The resulting color coordinates of the three primary colors on the chromaticity diagram are (0.70, 0.30), (0.33, 0.60) and (0.14, 0.09), respectively, covering 67.8% of the National Television System Committee standard. This process can be used with flexible substrates to produce low-cost inkjet printed color filters.

IER film and inkjet printing method for full-color transflective cholesteric LCD

A transflective cholesteric liquid crystal display (Ch-LCD) is demonstrated by using the image-enhanced reflector (IER) film on the top of the transmissive region to provide the similar paths for both transmissive and reflective light, thus, to display same image color in any ambience, improving the image quality. For full color display, the inkjet printing was applied and the patterned Ch-LC droplet was successfully deposited on the substrate. Thus, full-color Ch-LCD can be fabricated by IJP.

A single-substrate multicolor cholesteric liquid-crystal display prepared through ink-jet printing

— Ink-jet printing was used to prepare a single-substrate multicolor cholesteric liquid-crystal (Ch-LC) display incorporating three Ch-LCs exhibiting different reflective wavelengths. A room-temperature low-vacuum chemical-vapor-deposition process was developed for coating a thin polymer film onto the Ch-LC so that the top electrode could be coated onto the Ch-LC layer. Herein, the successful operation of such a 10.4-in. QVGA Ch-LC display at 40 V will be described.

20.1: SingleSubstrate Cholesteric Liquid Crystal Display by InkJet Printing Liquid PIPS Solution

This paper provides a photopolymerisation induced phase separation PIPS method for fabricating a bistable cholesteric liquid crystal display. We combine inkjet printing technology and phase separation method producing single substrate sidebyside color cholesteric liquid crystal displays by sequential inkjet printing for each color liquid crystals. The display exhibits an areacolourful image with low switching voltages and can be realized on a large scale and rolltoroll R2R fabrication in the future.

31.3: The Fabrication of Single Substrate Multi-Color Cholesteric Liquid Crystal Display by Ink-Jet Printing

We have developed a novel encapsulation method capable of producing single substrate multi-color cholesteric liquid crystal displays patterned by ink-jet printing. The top electrode can be printed onto thin excellent dielectric polymer layer covering Ch-LC. A 10.4 inch bi-stable display is successfully driven to demonstrate this proposed technique.