Patent ID: 7817133

Claim:
An electrophoretic display panel for displaying a picture and a subsequent picture comprising: a first substrate and a second substrate opposed to the first substrate; an electrophoretic medium between the first substrate and the second substrate; a plurality of pixels; a first electrode and a second electrode associated with each pixel for receiving a potential difference; and a driver; the electrophoretic medium being able to provide each pixel with an appearance, being one of a first extreme appearance, a second extreme appearance and intermediate appearances between the first extreme appearance and the second extreme appearance, and the driver being able to control for each pixel the potential difference: to a picture value that provides the pixel with a respective picture appearance being one of the appearances in dependence of the picture to be displayed, subsequently to an inter-picture value that provides the pixel with a respective inter-picture appearance, and subsequently to a subsequent picture value that provides the pixel with a respective subsequent picture appearance being one of the appearances in dependence of the subsequent picture to be displayed, wherein the driver is able to control for each pixel an estimate potential difference as the inter-picture value that provides the pixels with a respective estimate picture appearance as the inter-picture appearance, and wherein, for changing an initial pixel appearance to a final pixel appearance, the driver provides: an initial pulse having an initial duration, an initial value and an initial sign for changing the initial pixel appearance to a substantially extreme appearance being substantially equal to one of the extreme appearances associated with the final picture appearance, a plurality of pulses alternating in sign and having the initial value, wherein a first pulse of the plurality of pulses has a same sign as the initial sign, and a last pulse of the plurality of pulses has a final sign which is opposite the initial sign, each pulse of the plurality of pulses having a pulse duration which is less than the initial duration, and a final pulse having the final sign and a final duration larger than the pulse duration.