Patent ID: 7697194

Claim:
A display device comprising first ( 1 ) and second ( 2 ) substrates spaced apart by a plurality of partition walls ( 10 ; 20 ), the partition walls defining a plurality of pixels ( 12 , 14 ; 21 , 22 , 23 , 24 ) between the first and second substrates, each pixel comprising: at least first ( 118 , 120 ; FDE) and second ( 114 , 116 ; SDE) drive electrodes that are spaced apart from one another and that are drivable with control signals to generate primary electric field lines of force ( 16 ) extending between them; charged particles ( 115 ) that are movable under the influence of the primary electric field lines of force ( 16 ) to set the optical appearance of the pixel; and wherein the control signals also generate secondary electric field lines of force ( 18 ) that extend: in predetermined regions ( 200 ) of a pixel ( 12 ; 21 ) of the plurality of pixels; between an electrode ( 118 ; FDE, SDE, TDE, FRDE) of the pixel ( 12 ; 21 ) and an electrode ( 120 , 116 ; FDE, SDE, TDE, FRDE, CE 2 , RE 1 , VE, SVE) associated with a neighboring pixel ( 14 ; 22 ); and wherein the pixel ( 12 ; 21 ) further comprises blocking material ( 210 ) for physically blocking the charged particles ( 115 ) from the predetermined regions ( 200 ).