Memory Effect Canceling and Novel Driving Scheme of Twisting-ball Display via Space-charge Polarization

2017 ◽  
Vol 25 (5) ◽  
pp. 295-301 ◽  
Author(s):  
Yusuke Komazaki ◽  
Toru Torii
Keyword(s):  
Space Charge ◽  
Memory Effect ◽  
Space Charge Polarization ◽  
Charge Polarization

scholarly journals Effect of Radial Moisture Distribution on Frequency Domain Dielectric Response of Oil-Polymer Insulation Bushing

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1219 ◽  
Author(s):  
Daning Zhang ◽  
Guanwei Long ◽  
Yang Li ◽  
Haibao Mu ◽  
Guanjun Zhang
Keyword(s):  
Moisture Content ◽  
Space Charge ◽  
Frequency Domain ◽  
Water Distribution ◽  
Space Charge Polarization ◽  
Moisture Distribution ◽  
Mechanism Analysis ◽  
Loss Peak ◽  
Charge Polarization ◽  
Peak Value

In order to realize the diagnosis of water distribution, this paper analyzes the interface polarization and macroscopic space charge polarization mechanism when the water distribution is non-uniform. The experimental results of this paper and bushing show that when the moisture distribution is non-uniform, there is a significant loss peak in the tanδ-f curve. The loss peak shifts to higher frequencies as the non-uniformity coefficient increases. There are common intersection points between multiple tanδ-f curves. Further, this paper realizes the diagnosis of the location of moisture distribution through Frequency Domain Spectroscopy (FDS) testing of different voltages and different wiring methods based on the macroscopic space charge polarization. In the single-cycle FDS test, when the positive electrode is first added to the area with higher moisture content, the amplitude of the tanδ-f curve is smaller. The tanδ-f curves under different wiring methods constitute a “ring-shaped” loss peak. As the voltage increases, the peak value of the loss peak shifts to the lower frequency band. As the temperature increases, the peak value of the loss peak shifts to higher frequencies. Based on the above rules and mechanism analysis, this research provides a new solution for the evaluation of moisture content of oil-immersed polymers equipment.

Space charge polarization induced memory in SmNiO3/Si transistors

2013 ◽  
Vol 102 (7) ◽  
pp. 072102 ◽  
Author(s):  
Sang Hyeon Lee ◽  
Moonkyung Kim ◽  
Sieu D. Ha ◽  
Jo-Won Lee ◽  
Shriram Ramanathan ◽  
...  
Keyword(s):  
Space Charge ◽  
Space Charge Polarization ◽  
Charge Polarization

POLARIZATION CAPACITANCE OF DOPED POTASSIUM BROMIDE CRYSTALS

1966 ◽  
Vol 44 (5) ◽  
pp. 965-970 ◽  
Author(s):  
H. J. Wintle ◽  
J. Rolfe
Keyword(s):  
Diffusion Coefficient ◽  
Space Charge ◽  
Potassium Bromide ◽  
Space Charge Polarization ◽  
Experimental Results ◽  
Charge Polarization ◽  
Polarization Capacity ◽  
And Diffusion

Measurements have been made of the capacitance and conductance at 200 c.p.s. of a series of potassium bromide crystals doped with divalent anion and cation impurities. The dependence of the space-charge polarization capacity, caused by blocking of current carriers at the electrodes, on the conductivity and diffusion coefficient of carriers has been established. It is concluded that linearized theories of space-charge polarization cannot explain the experimental results.

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