Paperlike thermochromic display

Abstract

The authors report the design and implementation of a paperlike, thermally activated display fabricated from thermochromic composite and embedded conductive wiring patterns, shaped from mixture of metallic nanoparticles in polydimethylsioxane using soft lithography. The display exhibits good image quality and ease of control. Use of electric heating pulses is shown to reduce energy consumption while improving image quality control. The display has excellent mechanical bending flexibility.

Polydimethylsiloxane-based conducting composites and their applications in microfluidic chip fabrication

“…For example, Cong and Pan 56 doped 17%-21% by volume silver powder in the PDMS matrix to obtain superb thermal conductive PDMS of 71-81 W / m K, which is thought to be mainly attributed to the conductivity of silver filler. Liu et al 57 fabricated a flexible display device using PDMS/silver-based composites as electrodes and formed of two composite materials: A thermochromic polymer sheet for the upper layer, produced by mixing thermochromic powder with PDMS ͓Figs. 6͑a͒-6͑c͔͒, and a silver-embedded PDMS conductive composite electrode in a patterned logo for the lower layer ͓Fig.…”

Picture-to-picture switching in full-color thermochromic paper displays

“…Various thermally activated TC displays have been explored and manufactured using traditional printing tools on plastic foils, fine paper, and other low-cost substrates. 4,12 Flatbed and rotary screen-printing is widely used in order to generate information text and graphic arts onto a vast array of surfaces, such as paper, textile, and plastic foils. This technique utilizes a squeegee to force high-viscosity inks through the openings of steel or nylon woven meshes.…”

Flexible Reflective Color Displays using Thermochromic Pigments

“…Recently, a thermally actuated display using mono-color thermochromic polymer and a silver polydimethelysiloxane (PDMS) conductive wiring pattern was reported by Liu et al [5]. The thermochromic polymer used changed from dark green to white above 60℃.…”

“…The red color was achieved at 75℃ and a yellow-green color was activated at 180℃, which is high for a display that requires a fast response time, low power consumption, and safe operation. Regarding fabrication, design, and the optimization of thermo-optical properties, color reversibility and the color transition temperatures of thermochromic materials are key considerations [5][6][7]. However, despite much research on TCD, few reports have been issued on multicolor displays and outdoor information display applications [12].…”

“…Thermochromic materials have attracted great attention in the chemical, biochemical, and applied research areas, because their colors and optical properties depend on external stimuli, such as, heat and mechanical stress, and ligand interactions [5][6][7][8][9]. Applications for such materials include reflective thermochromic displays, temperature sensors, and color filters [10,11].…”