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Driving Scheme Optimization for Electrowetting Displays Based on Contact Angle Hysteresis to Achieve Precise Gray-Scales
- Source :
- Frontiers in Physics, Vol 9 (2021)
- Publication Year :
- 2021
- Publisher :
- Frontiers Media SA, 2021.
-
Abstract
- As a new display technology, electrowetting display (EWD) has many excellent display characteristics, such as paper-like, low power consumption, quick response and full color. These characteristics make EWD devices very suitable for portable devices. However, the gray-scale distortion caused by the contact angle hysteresis of EWDs seriously affects the accuracy of gray-scale display. To improve this phenomenon, the hysteresis curve of an EWD panel was studied according to the motion characteristics of advancing contact angle and receding contact angle of oil in a pixel. Then, a driving scheme for EWDs using alternating current (AC) voltage instead of direct current (DC) voltage was proposed in this paper. And the advantages and disadvantages of the driving scheme at different AC frequencies from 90 to 2,700 Hz were analyzed through experiments. According to the stability of aperture ratio in EWDs, a 470 Hz AC driving scheme was determined. Experimental results showed that the aperture ratio distortion of EWDs could be reduced from 35.82 to 5.97%, which significantly improved the display performance of pixel units.
- Subjects :
- Materials science
Materials Science (miscellaneous)
Acoustics
Biophysics
contact angle hysteresis
General Physics and Astronomy
02 engineering and technology
01 natural sciences
law.invention
aperture ratio
Contact angle
law
Distortion
0103 physical sciences
electrowetting display
Physical and Theoretical Chemistry
010306 general physics
Mathematical Physics
Pixel
Direct current
021001 nanoscience & nanotechnology
lcsh:QC1-999
Hysteresis
alternating current voltage
Electrowetting
driving scheme
0210 nano-technology
Alternating current
lcsh:Physics
Voltage
Subjects
Details
- ISSN :
- 2296424X
- Volume :
- 9
- Database :
- OpenAIRE
- Journal :
- Frontiers in Physics
- Accession number :
- edsair.doi.dedup.....53dfdeacd86a57d2615ca979171aedd9