US 11,747,703 B2
Method for driving color electronic paper and color electronic paper
Shengbo Zhang, Beijing (CN); Lichun Chen, Beijing (CN); and Qiangeng Cheng, Beijing (CN)
Assigned to Chongqing BOE Smart Electronics System Co., Ltd., Chongqing (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Appl. No. 17/599,670
Filed by Chongqing BOE Smart Electronics System Co., Ltd., Chongqing (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
PCT Filed Feb. 2, 2021, PCT No. PCT/CN2021/074885
§ 371(c)(1), (2) Date Sep. 29, 2021,
PCT Pub. No. WO2021/196869, PCT Pub. Date Oct. 7, 2021.
Claims priority of application No. 202010245014.5 (CN), filed on Mar. 31, 2020.
Prior Publication US 2022/0317538 A1, Oct. 6, 2022
Int. Cl. G09G 3/34 (2006.01); G02F 1/1685 (2019.01)
CPC G02F 1/1685 (2019.01) [G09G 3/344 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for driving a color electronic paper, wherein the color electronic paper comprises a plurality of microcapsules, and a first electrode and a second electrode disposed at both opposite sides of each of the plurality of microcapsules, each of the plurality of microcapsules comprises a white particle, a black particle, and a colored particle, an electrical polarity of a charge of the black particle and an electrical polarity of a charge of the white particle are opposite, the electrical polarity of the charge of the black particle and an electrical polarity of a charge of the colored particle are the same, and a charge-to-mass ratio of the black particle is greater than a charge-to-mass ratio of the colored particle,
the method comprises:
applying a first driving signal to the first electrode on a to-display-white microcapsule and a second driving signal to the first electrode on a to-display-black microcapsule, according to an image to be displayed,
wherein,
the first driving signal comprises: a first sub-driving signal applied to the first electrode in a display phase; and the first sub-driving signal is configured to drive the white particle in the to-display-white microcapsule to be closer to a display side than the black particle and the colored particle;
the second driving signal comprises: a second sub-driving signal applied to the first electrode in the display phase, and the second sub-driving signal is configured to drive the black particle in the to-display-black microcapsule to be closer to the display side than the white particle and the colored particle; and
a start time of an active voltage of the second sub-driving signal is not earlier than an end time of an active voltage of the first sub-driving signal,
wherein the second driving signal further comprises a third sub-driving signal configured to drive the black particle in the to-display-black microcapsule to be closer to the display side than the white particle and the colored particle in the display phase;
wherein the third sub-driving signal is written into the first electrode on the to-display-black microcapsule after the second sub-driving signal is written into the first electrode on the to-display-black microcapsule,
wherein a value and a duration of an active voltage of the third sub-driving signal are the same as those of the second sub-driving signal, and
wherein a value and a duration of an active voltage of the third sub-driving signal are the same as those of the second sub-driving signal.