Model and characterization for dynamic non-uniform pixel capacitance in electrowetting displays
Electrowetting display (EWD) is a new reflective display device that has the advantages of fast response speed, low power consumption, and video playback. The pixel capacitance of EWDs changes with the flow of internal liquid during the pixel-on process, which affects the pixel response speed. To ch...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-10-01
|
| Series: | Results in Physics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379723007945 |
| _version_ | 1827794320034365440 |
|---|---|
| author | Shufa Lai Diguo Zhai Taiyuan Zhang Linwei Liu Zichuan Yi Dong Yuan Biao Tang Guofu Zhou |
| author_facet | Shufa Lai Diguo Zhai Taiyuan Zhang Linwei Liu Zichuan Yi Dong Yuan Biao Tang Guofu Zhou |
| author_sort | Shufa Lai |
| collection | DOAJ |
| description | Electrowetting display (EWD) is a new reflective display device that has the advantages of fast response speed, low power consumption, and video playback. The pixel capacitance of EWDs changes with the flow of internal liquid during the pixel-on process, which affects the pixel response speed. To characterize the change in pixel capacitance and analyze the relationship between pixel capacitance and pixel response speed, we established a dynamic capacitance model during the pixel-on process, derived the integral equation of pixel capacitance, and demonstrated the validity of the model. Meanwhile, we also investigated the effects of the initial angle formed between the oil and the pixel wall, and the relative permittivity of the oil and the hydrophobic insulating layer on the pixel capacitance, respectively. Results showed that the pixel capacitance increased as the initial angle and the relative permittivity of the oil and hydrophobic insulation layers increased. In addition, when the initial angle is 0. 4π and the aperture ratio exceeded 30%, the time required for the pixel to reach the corresponding aperture ratio was the shortest. Moreover, the smaller the relative permittivity of hydrophobic insulating layer, the shorter time required for the pixel to reach the corresponding aperture ratio. |
| first_indexed | 2024-03-11T18:30:59Z |
| format | Article |
| id | doaj.art-6f156b7029a54f3c9b902c9e7688e94b |
| institution | Directory Open Access Journal |
| issn | 2211-3797 |
| language | English |
| last_indexed | 2024-03-11T18:30:59Z |
| publishDate | 2023-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj.art-6f156b7029a54f3c9b902c9e7688e94b2023-10-13T11:04:23ZengElsevierResults in Physics2211-37972023-10-0153107001Model and characterization for dynamic non-uniform pixel capacitance in electrowetting displaysShufa Lai0Diguo Zhai1Taiyuan Zhang2Linwei Liu3Zichuan Yi4Dong Yuan5Biao Tang6Guofu Zhou7Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, ChinaGuangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China; Corresponding authors at: South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China.Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, ChinaGuangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, ChinaSchool of Electronic Information, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan 528402, ChinaGuangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China; Corresponding authors at: South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China.Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, ChinaGuangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, ChinaElectrowetting display (EWD) is a new reflective display device that has the advantages of fast response speed, low power consumption, and video playback. The pixel capacitance of EWDs changes with the flow of internal liquid during the pixel-on process, which affects the pixel response speed. To characterize the change in pixel capacitance and analyze the relationship between pixel capacitance and pixel response speed, we established a dynamic capacitance model during the pixel-on process, derived the integral equation of pixel capacitance, and demonstrated the validity of the model. Meanwhile, we also investigated the effects of the initial angle formed between the oil and the pixel wall, and the relative permittivity of the oil and the hydrophobic insulating layer on the pixel capacitance, respectively. Results showed that the pixel capacitance increased as the initial angle and the relative permittivity of the oil and hydrophobic insulation layers increased. In addition, when the initial angle is 0. 4π and the aperture ratio exceeded 30%, the time required for the pixel to reach the corresponding aperture ratio was the shortest. Moreover, the smaller the relative permittivity of hydrophobic insulating layer, the shorter time required for the pixel to reach the corresponding aperture ratio.http://www.sciencedirect.com/science/article/pii/S2211379723007945Electrowetting displayPixel capacitanceDynamic capacitance modelThe relative permittivityContact angle |
| spellingShingle | Shufa Lai Diguo Zhai Taiyuan Zhang Linwei Liu Zichuan Yi Dong Yuan Biao Tang Guofu Zhou Model and characterization for dynamic non-uniform pixel capacitance in electrowetting displays Results in Physics Electrowetting display Pixel capacitance Dynamic capacitance model The relative permittivity Contact angle |
| title | Model and characterization for dynamic non-uniform pixel capacitance in electrowetting displays |
| title_full | Model and characterization for dynamic non-uniform pixel capacitance in electrowetting displays |
| title_fullStr | Model and characterization for dynamic non-uniform pixel capacitance in electrowetting displays |
| title_full_unstemmed | Model and characterization for dynamic non-uniform pixel capacitance in electrowetting displays |
| title_short | Model and characterization for dynamic non-uniform pixel capacitance in electrowetting displays |
| title_sort | model and characterization for dynamic non uniform pixel capacitance in electrowetting displays |
| topic | Electrowetting display Pixel capacitance Dynamic capacitance model The relative permittivity Contact angle |
| url | http://www.sciencedirect.com/science/article/pii/S2211379723007945 |
| work_keys_str_mv | AT shufalai modelandcharacterizationfordynamicnonuniformpixelcapacitanceinelectrowettingdisplays AT diguozhai modelandcharacterizationfordynamicnonuniformpixelcapacitanceinelectrowettingdisplays AT taiyuanzhang modelandcharacterizationfordynamicnonuniformpixelcapacitanceinelectrowettingdisplays AT linweiliu modelandcharacterizationfordynamicnonuniformpixelcapacitanceinelectrowettingdisplays AT zichuanyi modelandcharacterizationfordynamicnonuniformpixelcapacitanceinelectrowettingdisplays AT dongyuan modelandcharacterizationfordynamicnonuniformpixelcapacitanceinelectrowettingdisplays AT biaotang modelandcharacterizationfordynamicnonuniformpixelcapacitanceinelectrowettingdisplays AT guofuzhou modelandcharacterizationfordynamicnonuniformpixelcapacitanceinelectrowettingdisplays |