Low voltage fast response display using dual π-cells with quarter-wave thickness

2014 ◽  
Vol 22 (5) ◽  
pp. 229-236
Author(s):  
HsienHui Cheng ◽  
Achintya Bhowmik ◽  
Philip. J. Bos
Keyword(s):  
Low Voltage ◽  
Fast Response ◽  
Quarter Wave

Flexible PLED displays and related technologies

2004 ◽  
Vol 814 ◽  
Author(s):  
G. Nisato ◽  
C. Mutsaers ◽  
H. Buijk ◽  
P. Duineveld ◽  
E. Janssen ◽  
...  
Keyword(s):  
High Performance ◽  
Structural Integrity ◽  
Low Voltage ◽  
Flexible Substrate ◽  
Fast Response ◽  
Industrial Applications ◽  
Hole Transport ◽  
The Other ◽  
Enabling Technology ◽  
Other Hand

AbstractFlexible, free shape displays are the enabling technology for new robust, lightweight, extremely thin, portable electronic devices. Polymer Light Emitting Diodes (PLED) are especially suited for these applications, due to their fast response time, low voltage, high luminous efficiency and viewing angle performance. On the other hand, PLED displays are extremely sensitive to moisture and oxygen. Substrate materials provided with high performance hermetic and conducting layers are therefore an essential component for manufacturing these flexible devices. Polymer based substrates provide the necessary mechanical flexibility; they also require several thin, brittle, functional inorganic layers such diffusion barriers and transparent electrodes. The structural integrity, dimensional stability and thermal properties of the substrate stack are crucial to insure device functionality and reliability. For polymer-based substrate several effects lead to dimensional variation of the substrates, such as solvent uptake, physical ageing of the polymer base, thermal expansion and stress induced deformations. These effects must be taken into account to successfully perform classic photolithographic steps.Ink-jet printing is a critical enabling technology for flexible PLED displays, providing a customizable means to dispense solution-based polymers onto a flexible substrate, allowing for multi-color devices. On the other hand, IJP must meet several challenges, especially to comply with industrial applications. For example, accurate landing position of the droplets to form homogeneous hole-transport and electroluminescent layers as well as good wetting characteristic of the substrates must be obtained with reliable high throughput techniques.

Research on Fast Driving Control Technology of Electric-Control Injector for Marine High Pressure Common Rail Diesel

2014 ◽  
Vol 672-674 ◽  
pp. 1568-1573
Author(s):  
Yan Feng Kong ◽  
Guang Yao Ouyang ◽  
Zhen Ming Liu ◽  
Lu Li
Keyword(s):  
High Pressure ◽  
Low Voltage ◽  
Fast Response ◽  
Solenoid Valve ◽  
Common Rail ◽  
Time Sharing ◽  
Marine Diesel ◽  
Driving Circuit ◽  
Dual Power ◽  
High Pressure Common Rail

Based on the analyses of the current solenoid valve driving circuits in marine diesel, a new type of dual-power double-maintain injector driving circuit is designed for marine high-pressure common-rail diesel. The circuit uses BOOST high voltage (80V) and storage battery low voltage (24V) to make up of dual-power time-sharing driver, which achieves automatic PWM feedback modulation of the solenoid valve injection current from the hardware. Experiments were carried out on a certain type of injector, the results showed that: the driving circuit had fast response time, only 0.045ms from zero to 22A of the solenoid valve current was required; the peak value of driving current has a good consistency, parameters including peakvalue current altitude, lasting time, maintain current altitude and maintain current lasting time could be adjusted flexibly. Besides, the circuit could be flexibly configured without occupying MCU resources.

A Fast-Response Electroactive Actuator Based on TEMPO-Oxidized Cellulose Nanofibers

2021 ◽  
Author(s):  
Yan Huang ◽  
Fang Wang ◽  
Liying Qian ◽  
Xiuhua Cao ◽  
Beihai He ◽  
...  
Keyword(s):  
Layered Structure ◽  
Self Assembly ◽  
Biomedical Applications ◽  
Low Voltage ◽  
Cellulose Nanofibers ◽  
Conductive Polymer ◽  
Fast Response ◽  
Tempo Oxidation ◽  
Ion Migration ◽  
High Mechanical Strength

Abstract Cellulose-based electroactive actuators are promising candidates for biomimetic robots and biomedical applications due to their lightweight, high mechanical strength, and natural abundance. However, cellulose-based electroactive actuators exhibit lower actuation performance than traditional conductive polymer actuators. This work reports a fast-response cellulose-based electroactive actuator based on 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) oxidized nanocellulose (TOCNF) film with layered structure fabricated by evaporation, and gold electrodes prepared by ion sputtering. The residual ions during the TEMPO oxidation process and the layered structure due to self-assembly accelerate the ion migration efficiency in actuators. The proposed actuator can reach a tip displacement of 32.1 mm at a voltage of 10 V and deflect 60° in 5 s. After applying a reverse 10 V voltage, the actuator can also be quickly deflected (42.5 mm). In addition, the actuator also shows high electrical actuation performance at low voltage (5 V). The excellent electroactive performance of as-prepared TOCNF/Au enables the feasibility to be applied to actuators.

Research on Current Feedback Drive Control Technology of Injector Solenoid Valve

2014 ◽  
Vol 494-495 ◽  
pp. 1282-1285
Author(s):  
Zhen Ming Liu ◽  
Guang Yao Ouyang ◽  
Ze Long Zhang
Keyword(s):  
Low Voltage ◽  
Fast Response ◽  
Solenoid Valve ◽  
Electromagnetic Response ◽  
Time Sharing ◽  
Current Feedback ◽  
Drive Current ◽  
Peak Current ◽  
Common Rail Injector ◽  
Drive Circuit

In order to develop drive circuit for high pressure common rail injector solenoid valve, analysis the model of drive circuit and study the relation between voltage and electromagnetic response of solenoid valve. The controllable BOOST circuit was designed to provide the high voltage helping to improve electromagnetic response, and high and low voltage time-sharing driving circuit was designed based on current feedback control. Drive current can be adjusted automatically according to the peak current and holding current, with better consistency of peak current. The result of driving experiment for certain injector shows that: the new drive circuit has fast response, with only 0.045ms rising time for drive current reaching the peak value 22A, and peak current has good consistency.

Electromechanical model-based adaptive control of multilayered dielectric elastomer bending actuator

2021 ◽  
pp. 1-26
Author(s):  
Fanghao Zhou ◽  
Jin He ◽  
Mingqi Zhang ◽  
Youhua Xiao ◽  
Chen Zheng ◽  
...  
Keyword(s):  
Large Deformation ◽  
Control Strategy ◽  
Low Voltage ◽  
Dynamic Control ◽  
Fast Response ◽  
Dielectric Elastomer ◽  
Parameter Uncertainties ◽  
Soft Robots ◽  
Model Based ◽  
Bending Actuator

Abstract Dielectric elastomer (DE) possesses attributes such as large deformation and fast response. As a typical DE actuating structure, the multilayered DE bending actuator (MDEBA) is lightweight, and can actuate in relatively low voltage without a rigid frame and pre-stretch. These attributes arouse wide research interest in the MDEBA on the application of soft robots. However, due to its large deformation and nonlinear electromechanical dynamics, the control of MDEBA remains highly challenged. Considering the large bending deformation and gravity effect, we develop an electromechanical dynamic model-based control strategy, which can adaptively compensate for the parameter uncertainties during the actuation of MDEBA. Experimental results validate that this control strategy provides highly enhanced control performances compared to the PID controller. The electromechanical modeling method and dynamic control strategy may guide the further study of MDEBA, soft robots, and flexible devices.

Sandwich structured dielectrics for air-stable and flexible low-voltage organic transistors in ultrasensitive pressure sensing

2020 ◽  
Vol 4 (5) ◽  
pp. 1459-1470 ◽  
Author(s):  
Yue Jiang ◽  
Ziyang Liu ◽  
Zhigang Yin ◽  
Qingdong Zheng
Keyword(s):  
Low Power ◽  
Low Voltage ◽  
Pressure Sensors ◽  
Fast Response ◽  
Organic Transistors ◽  
Pressure Sensing ◽  
Detection Range ◽  
Ultrahigh Sensitivity

A novel type of polymer sandwich dielectric is developed for air-stable, hysteresis-free and flexible OTFTs which can be used for low-power pressure sensors with ultrahigh sensitivity, wide detection range and fast response.

scholarly journals Laterally Movable Triple Electrodes Actuator toward Low Voltage and Fast Response RF-MEMS Switches

Sensors ◽  
2019 ◽  
Vol 19 (4) ◽  
pp. 864 ◽  
Author(s):  
Yasuyuki Naito ◽  
Kunihiko Nakamura ◽  
Keisuke Uenishi
Keyword(s):  
Rf Mems ◽  
Low Voltage ◽  
Low Cost ◽  
Actuation Voltage ◽  
Fast Response ◽  
Point Of View ◽  
Micro Electro Mechanical Systems ◽  
Mems Switches ◽  
Rf Mems Switches ◽  
Series Switch

A novel actuator toward a low voltage actuation and fast response in RF-MEMS (radio frequency micro-electro-mechanical systems) switches is reported in this paper. The switch is comprised of laterally movable triple electrodes, which are bistable by electrostatic forces applied for not only the on-state, but also the off-state. The bistable triple electrodes enable the implementation of capacitive series and shunt type switches on a single switch, which leads to high isolation in spite of the small gap between the electrodes on the series switch. These features of the actuator are effective for a low voltage and fast response actuation in both the on- and off-state. The structure was designed in RF from a mechanical point of view. The laterally movable electrodes were achieved using a simple, low-cost two-mask process with 2.0 µm thick sputtered aluminum. The characteristics of switching response time and actuation voltage were 5.0 µs and 9.0 V, respectively.

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