Design of Driving Waveform for Shortening Red Particles Response Time in Three-Color Electrophoretic Displays

Zeng, Wenjun; Yi, Zichuan; Zhou, Xiangyu; Feng, Haoqiang; Yang, Jianjun; Liu, Liming; Chi, Feng; Zhang, Chongfu; Zhou, Guofu

doi:10.3390/mi12050578

Cited by 10 publications

(9 citation statements)

References 30 publications

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“…The design of the driving stage is a square wave to reduce power consumption of EWDs. The power consumption of the driving stage can be calculated by Equation (5).…”

Section: Design Of Driving Waveformmentioning

confidence: 99%

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A Driving Method for Reducing Oil Film Splitting in Electrowetting Displays

Zeng

Wang

et al. 2021

Membranes

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Electrowetting displays (EWDs) are one of the most potential electronic papers. However, they have the problem of oil film splitting, which could lead to a low aperture ratio of EWDs. In this paper, a driving waveform was proposed to reduce oil film splitting. The driving waveform was composed of a rising stage and a driving stage. First, the rupture voltage of oil film was analyzed by testing the voltage characteristic curve of EWDs. Then, a quadratic function waveform with an initial voltage was applied at the rising stage to suppress oil film splitting. Finally, a square wave was applied at the driving stage to maintain the aperture ratio of EWDs. The experimental results show that the luminance was increased by 8.78% and the aperture ratio was increased by 4.47% compared with an exponential function driving waveform.

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“…The design of the driving stage is a square wave to reduce power consumption of EWDs. The power consumption of the driving stage can be calculated by Equation (5).…”

Section: Design Of Driving Waveformmentioning

confidence: 99%

“…Electronic paper is a new type of reflective display device [1,2], which incorporates electrowetting displays (EWDs) [3,4] and electrophoretic displays (EPDs) [5,6]. These have the advantages of low power consumption, flexibility, readability in sunlight, and a wide viewing angle [7,8].…”

Section: Introductionmentioning

confidence: 99%

A Driving Method for Reducing Oil Film Splitting in Electrowetting Displays

Zeng

Wang

et al. 2021

Membranes

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“…As a new display technology, EPD has the advantages of low power consumption, wide viewing angle, and high reliability [11][12][13][14][15][16][17]. Black and white EPD is a mature commercial product [18,19], but color EPD has better application prospects in the market [20].…”

Section: Introductionmentioning

confidence: 99%

A Novel Modification of Copper (II) Phthalocyanine Particles towards Electrophoretic Displays

et al. 2022

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Electrophoretic display (EPD) is a popular display technology in recent years. The core of the EPD is electrophoretic particles, and its Zeta potential has an important impact on EPDs. In this work, a method using pyrrolidine mono ionic liquid was proposed to improve the Zeta potential of electrophoretic particles: Copper (II) phthalocyanine pigment was modified with mono ionic liquid 1-Butyl-1-methylpyrrolidinium bromide. The characterization results show that the mono ionic liquid had been successfully coated on pigment particles. At the same time, the dispersion and stability of particles were improved. The modified Copper (II) phthalocyanine pigment could be stably dispersed in tetrachloroethylene for more than 20 days. The Zeta potential increased from 32.42 mV to 49.91 mV, increasing by 53.95%. Finally, the prepared blue electrophoretic particles were compounded with white titanium dioxide to prepare blue and white dual-color electrophoretic dispersion, and then an EPD cell was designed to test its performance. The results show that the prepared electrophoretic dispersion can realize reversible reciprocating motion. Therefore, because of the unique structure and properties of pyrrolidine mono ionic liquids, the blue nanoparticles prepared with pyrrolidine ionic liquids as charge control agents in this study can be used as excellent candidate materials for EPD.

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“…However, the response speed of EPDs could be prolonged when a red driving stage was added. A new DC balance rule was proposed to solve this problem [ 18 ], and it could improve the response speed of red particles. The activation stage was used to improve the particle activity and the red saturation [ 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Red Display for Three-Color Electrophoretic Displays with High Saturation via a Separation Stage between Black and Red Particles

et al. 2022

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A three-color electrophoretic display (EPD) can solve the defect of an insufficient color display of black/white EPDs, but it is difficult to achieve a high red saturation due to the same driving polarity between black and red electrophoretic particles. In this work, a separation stage was proposed in the driving process to increase the red saturation in three-color EPDs. Firstly, red particles’ motion was analyzed by the electrophoretic theory and Stokes’ theorem to optimize driving parameters. Secondly, the activity of black particles was analyzed by testing different driving process parameters, and an optimal activation parameter for red particles was obtained. Next, the separation stage parameters were analyzed to reduce the mixing degree of black and red electrophoretic particles. Experimental results showed that the red and black electrophoretic particles could be effectively separated. Compared with an existing driving method, the red saturation was increased by 23.4%.

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Design of Driving Waveform for Shortening Red Particles Response Time in Three-Color Electrophoretic Displays

Cited by 10 publications

References 30 publications

A Driving Method for Reducing Oil Film Splitting in Electrowetting Displays

A Driving Method for Reducing Oil Film Splitting in Electrowetting Displays

A Novel Modification of Copper (II) Phthalocyanine Particles towards Electrophoretic Displays

Red Display for Three-Color Electrophoretic Displays with High Saturation via a Separation Stage between Black and Red Particles

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