격벽형 전자종이의 하전입자 필터링 방법 및 구동조건에 따른 응답시간 및 반사율 분석 = Analysis of Response Time and Reflectivity According to Driving Conditions of Barrier Rib-Type E-Paper Fabricated by Charged Particle Filtering Method

다국어 초록 (Multilingual Abstract)

For electronic paper displays using electrophoresis, the response time and reflectivity of the image panel fabricated by filtering are analyzed. For the filtering process, a square wave and ramp wave are applied to white charged particles with a unique q/m value. We divide the sample panels into #1 to #4 according to the applied waveform in the filtering process. Step waves comprising two steps are used to drive the panel; therefore, we divide the driving conditions into D1~D4. The applied voltage at the first stage of the half cycle of the driving waveform moves the charged particles attached via the image force from the electrode, and the applied voltage at the second stage moves the floating charged particles by detaching. As mentioned, four types of driving conditions (D1 to D4) classified according to the half cycle of the driving waveform are applied to the samples #1 to #4), which are classified according to four types of filtering process. When driving condition D1 is applied to the four types of sample panels, the rise time of #1 is 1.59s, #2 is 1.706s, #3 is 1.853s, and #4 is 1.235s, resulting in #4 being relatively faster compared with other sample panels, and showing the same trend in other driving conditions. As a result, we confirm that applying the driving condition D1 causes abrupt movement of the white charged particles injected into the cell. When the same driving waveform (D1) is applied to each sample, reflectivities of 32.1% for #1, 31.4% for #2, 27.9% for #3, and 63.4% for #4 are measured. From the experiment, we confirm that the driving condition D1 (1s of 3.5 V, 9s of 3.0 V) and ramp wave #4 in filtering are desirable for good reflectivity and response time. Our research is expected to contribute to the improvement of the filtering process and optimization of the driving waveform.

참고문헌 (Reference)

1 W. C. Kao, 12 : 129-, 2016

2 M. G. Pitt, 33 : 1378-, 2012

3 X. Meng, 14 : 1617-, 2014

4 M. T. Johnson, 14 : 175-, 2012

5 F. Duan, IEEE 498-, 2016

6 T. Bert, 27 : 50-, 2006

7 T. Bert, 24 : 223-, 2003

8 G. X. Li, 12 : 1145-, 2016

9 C. M. Lu, 7 : 434-, 2011

10 B. R. Yang, SPIE OPTO 1012602-, 2017

11 C. M. Chang, 42 : 1545-, 2012

12 Z. C. Yi, 21 : 3133-, 2014

13 L. Wang, 25 : 384-, 2017

14 K. M. H. Lenssen, 17 : 383-, 2012

15 W. C. Kao, 8 : 596-, 2012

16 김인호, "토너입자형 디스플레이의 응답특성에 관한 연구" 한국전기전자재료학회 22 (22): 93-97, 2009

17 이주원, "전기영동형 전자종이 디스플레이에서 전자잉크의 주입 방법 및 구동파형에 따른 전류 특성 분석" 한국전기전자재료학회 33 (33): 386-392, 2020

18 안형진, "전기영동 디스플레이에서 전자 잉크의 전류 특성 및 평가" 한국전기전자재료학회 33 (33): 31-36, 2020

19 송진석, "싱글입자-마이크로캡슐형 전자종이의 셀갭 차이에 따른구동 특성평가" 한국전기전자재료학회 28 (28): 518-523, 2015

20 이상일, "3전극형 전자종이 디스플레이의 전자잉크 주입 방법에 따른 광학 특성 분석" 한국전기전자재료학회 31 (31): 171-176, 2018