Title:
METHOD FOR HIGH GRAY LEVEL ELECTROWETTING DISPLAY DEVICE BASED ON COOPERATION OF VOLTAGE MODULATION AND TIME MODULATION
Document Type and Number:
WIPO Patent Application WO/2023/216350
Kind Code:
A1
Abstract:
The present invention provides a method for a high gray level electrowetting display device based on cooperation of voltage modulation and time modulation. The method comprises: firstly, quantizing inputted image data into n-bit quaternary; dividing a row display period T into n sub-periods, and weighting the sub-periods; assigning four different voltage amplitudes to a display unit within a same sub-period, voltage amplitudes of the sub-periods being different and in a certain multiple relationship; and sequentially displaying all the sub-periods bit by bit within display time of the row display period T to form 4n brightness gray levels. According to the present invention, by means of the advantage of a low response speed requirement for a driving circuit and the display device by using amplitude modulation, the defect that the display quality is reduced due to the fact that the display device cannot respond to too narrow pulses when PWM modulation is used in electrowetting is overcome; moreover, by means of the advantage of easy implementation of the driving circuit by using the PWM modulation, the defect that a circuit is complex by using the amplitude modulation in electrowetting is overcome, and a display effect of a higher gray level of electrowetting electronic paper is achieved.
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Inventors:
LIN ZHIXIAN (CN)
MEI TING (CN)
LIN SHANLING (CN)
GUO TAILIANG (CN)
ZHANG YONGAI (CN)
LIN JIANPU (CN)
ZHAO JINGWEI (CN)
FEI QIANYI (CN)
WANG LIXIANG (CN)
WU YUHANG (CN)
MEI TING (CN)
LIN SHANLING (CN)
GUO TAILIANG (CN)
ZHANG YONGAI (CN)
LIN JIANPU (CN)
ZHAO JINGWEI (CN)
FEI QIANYI (CN)
WANG LIXIANG (CN)
WU YUHANG (CN)
Application Number:
PCT/CN2022/097508
Publication Date:
November 16, 2023
Filing Date:
June 08, 2022
Export Citation:
Assignee:
UNIV FUZHOU (CN)
International Classes:
G09G3/34
Domestic Patent References:
| WO2014042425A1 | 2014-03-20 |
Foreign References:
| CN106169287A | 2016-11-30 | |||
| CN106486071A | 2017-03-08 | |||
| CN1532885A | 2004-09-29 | |||
| CN1181678A | 1998-05-13 | |||
| US20200357348A1 | 2020-11-12 |
Other References:
SHENG-QI SHAN, LIN SHAN-LING; LIN ZHI-XIAN; GUO TAI-LIANG: "Design and implementation of electrowetting multi-gray dynamic display driving system", CHINESE JOURNAL OF LIQUID CRYSTALS AND DISPLAYS, vol. 33, no. 3, 15 March 2018 (2018-03-15), pages 213 - 220, XP093109343
YING ZHOU: "Research on Gray Scale Formation Method of Electrowetting Display", PRACTICAL ELECTRONICS, vol. 15, 1 August 2017 (2017-08-01), pages 53 - 54, XP093109345, DOI: 10.16589/j.cnki.cn11-3571/tn.2017.15.021
YING ZHOU: "Research on Gray Scale Formation Method of Electrowetting Display", PRACTICAL ELECTRONICS, vol. 15, 1 August 2017 (2017-08-01), pages 53 - 54, XP093109345, DOI: 10.16589/j.cnki.cn11-3571/tn.2017.15.021
Attorney, Agent or Firm:
FUZHOU YUANCHUANG PATENT AND TRADEMARK AGENT LTD. (CN)
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