Norio Nihei

A novel bistable reflective display using quick-response liquid powder

We have developed new powder materials that exhibit liquid behavior, which can lead to the realization of novel bistable and reflective displays having paper-white appearance, high contrast, and quick response. Two types of display were demonstrated, one had 160 x 160 array of pixels and the other had 320 x 320 in a 3.1-in.-diagonal viewable image size corresponding to 66 and 132 dpi, respectively. These displays were driven by passive-matrix addressing. The displays showed a reflectivity of more than 41%, a contrast more than 1:10, and a pixel response time of less than 0.2 msec. The seven-segment display for use in clocks was also demonstrated.

20.3: Novel Type of Bistable Reflective Display using Quick Response Liquid Powder

We have developed new liquid-behavior-powder materials that realize a novel type of bistable reflective display showing paper-white appearance, high contrast and quick response. The demonstrated display has a 160×160 array of pixels and a 3.1- inch diagonal viewable image size with a pixel response less than 0.2 msec and is driven by passive-matrix addressing.

A Flexible electronic-paper display with an ultra-thin and flexible LSI driver using quick-response liquid-powder technology

— A thin and flexible LSI driver with a thickness of less than 35 μm for a passive-matrix-driven Quick-Response Liquid-Powder Display (QR-LPD™) was successfully mounted onto the flexible printed circuit (FPC) and the back substrates of a flexible QR-LPD™. Amounted LSI driver on a plastic substrate shows no significant degradation in the driving performances and maintains physical flexibility without any connection failures. This technology can realize a fully flexible electronic paper in combination with a plastic-substrate QR-LPD™ fabricated by a roll-to-roll process.

10.3: Distinguished Paper: Ultra Thin and Flexible Paper‐Like Display using QR‐LPD® Technology

Really paper-like display as thin as 290 μm has been developed, which has a 160×160 array of pixels, 3.1-inch diagonal viewable image size, and white-paper appearance. Plastic substrate with 120 μm in thickness was used resulting in a flexible display which can be bent up to 20 mm in radius of curvature. This can be realized only by QR-LPD® technology.

A reflective-display QR-LPD®

Abstract— A novel reflective display [Quick-Response Liquid Powder Display (QR-LPD®)], has been developed. This paper-like display has the advantages of outstanding image stability, easy viewing, low-power consumption, and a high-response time. QR-LPD® will be promoted, initially, for use as electronic price-tag displays for merchandise. In addition, QR-LPD® is suitable for flexible display applications because it does not require TFT arrays or a high-temperature process while maintaining an excellent paper-like image as well as glass-type display compatibility.

45.1: Invited Paper: Ultra‐thin and Flexible LSI Driver Mounted Electronic Paper Display using Quick‐Response Liquid‐Powder Technology

The thin and flexible LSI driver with a thickness of less than 40μm for passive-matrix driven Quick-Response Liquid Powder Display (QR-LPD™) was successfully mounted onto the flexible printed circuit (FPC). The mounted LSI on the plastic substrate shows no significant degradation in the driving performances and keeps physical flexibility without any failures of connection. This technology can realize the fully flexible electronic paper in combination with a plastic substrate QR-LPD™ fabricated by roll-to-roll process.

A quick‐response liquid‐powder display (QR‐LPD®) with plastic substrate

Paper-like displays as thin as 290 μm have been developed using QR-LPD technology. We fabricated two types of displays. One is a dot-matrix type with a 160 x 160 array of pixels and a 3.1-in.-diagonal viewable image size. The other is a segmented type for clock use. Each display has a paper-like appearance and exhibits high contrast. Plastic substrates with a thickness of 120 μm were used, resulting in flexible displays that can be bent up to a radius of curvature of 20 mm.

Passive-Matrix Flexible Electronic Paper Using Quick-Response Liquid Powder Display (QR-LPD) Technollogy and Custom Driver Circuits

A low-power high-voltage physically-flexible driver is fabricated for passive-matrix plastic-substrate quick-response liquid powder displays (QR-LPD). A level-shifter circuit effectively reduces the power consumption and the chip area. The 2.3 times 21.4mm2 IC is thinned down to 35mum to obtain physical flexibility.

37.3: Three-Voltage-Level Driver Driven Quick-Response Liquid Powder Display

We developed a new custom-made high voltage driver with three voltage levels and with low power consumption for Quick-Response Liquid Powder Display (QR-LPD), which allows a variety of driving method. The difference between the driving methods was investigated in terms of image quality and power consumption.

Process for controlling vibration damping force in a vibration damping device

In order to develop sufficient vibration damping performance and effectively prevent transmission of goading vibrations and others in a vibration damping device using an electrorheological fluid, if the moving directions of vibration input side member and vibration output side member of the device are opposite to each other, a voltage applied to electrodes in the device is increased to increase the viscosity of the electrorheological fluid, while if absolute value of vibration acceleration velocity in the vibration input side member exceeds a given value, a voltage applied to the electrodes is always decreased to decrease the viscosity of the fluid.