公开(公告)号：US12094429B2

公开(公告)日：2024-09-17

申请号：US18475643

申请日：2023-09-27

申请人： E INK CORPORATION

发明人： Craig Lin ,  Xiaolong Zheng

IPC分类号： G09G3/34

CPC分类号： G09G3/344 ,  G09G2310/0254

摘要： An electrophoretic medium comprises a fluid and first (B), second (Y), third (R) and fourth (W) particles dispersed in the fluid and having differing colors. The first (B) and third (R) particles bear charges of one polarity and the second (Y) and fourth (W) particles bear charges of the opposite polarity, The first particles (B) have a greater zeta potential than the third particles (R), and the second particles (Y) have a greater zeta potential than the fourth particles (W). One of the particles (W) is white, one of the non-white particles (B) is partially light-transmissive, and the remaining two non-white particles are light-reflective. To display the color of a mixture of the first (B) and second (Y) particles at a viewing surface, the medium is driven to display the second particles (Y) at the viewing surface, then a first driving voltage is applied for a first period to drive the second (Y) and fourth (W) particles towards the viewing surface, then a second driving voltage, of opposite polarity to and lower magnitude than, the first voltage, is applied for a second period less than the first period, and finally the applications of the two driving voltages are repeated.

公开(公告)号：US11868020B2

公开(公告)日：2024-01-09

申请号：US17339216

申请日：2021-06-04

申请人： E Ink Corporation

发明人： Xiaolong Zheng ,  Craig Lin

IPC分类号： G02F1/16757 ,  G02F1/167 ,  G02F1/1677 ,  G09G3/20 ,  G02F1/1685 ,  G09G3/34

CPC分类号： G02F1/16757 ,  G02F1/167 ,  G02F1/1677 ,  G02F1/1685 ,  G09G3/2003 ,  G09G3/344

摘要： An electrophoretic medium comprises a fluid and first, second, third and fourth types of particles (W, Y, R, B) having four different colors. The first and third particles have charges of one polarity and the second and fourth particles charges of the opposite polarity; the first particles have a greater zeta potential or electrophoretic mobility than the third particles, and the second particles a greater zeta potential or electrophoretic mobility than the fourth particles. One particle is white (W), one non-white particle (B) is partially light-transmissive, and the remaining two non-white particles (R, Y) are light-reflective. A third light-reflective particle (G) may be added to create a five particle medium.