Koninklijke Philips Corporation N.v.

Adrea, LLC

Neculai N Ailenei

Mark Thomas Johnson

Guofu Zhou

Alexander Victor Henzen

Rogier H M Cortie

Johannes Petrus Van De Kamer

Mischa E T Nelis

Roger P A Deinoij

An electrophoretic display panel and a method for driving an electrophoretic display panel in which the drive pulse, i.e. the grey scale pulse, to bring an element from a preceding optical state to an optical state is split in more than one sub-pulses. A more gradual introduction of the grey scale is thereby achieved reducing the suddenness of the transition form one image to another. Preferably application of the grey scale potential differences is preceded by application of reset pulses in which case the preceding optical state is an extreme optical state.

Electrophoretic display panel using shake and reset pulses

An electrophoretic display () and a system () implement a method of activating a portion of the electrophoretic display (). The method involves a reception of drawing information (), a determination of at least one drawing-mode waveform () based on the drawing information (), and an addressing of the electrophoretic display () based on the received drawing information () and the drawing-mode waveform ().

Electrophoretic display with rapid drawing mode waveform

In a first display mode, only the information in a first sub-area (W) of the display screen of a bi-stable matrix display () has to be updated. In a second display mode, the information in a second sub-area (W) of the display screen has to be updated. The information in the first sub-area (W) is displayed using optical states which require first drive voltage waveforms (DV) having a maximum duration equal to a first image update period (IUP). The information in the second area (W) is displayed using optical states which require second drive voltage waveforms (DV) having a maximum duration equal to a second image update period (IUP). The optical states allowed to be used during the first mode are selected to obtain a first image update period (IUP) which is shorter than the second image update period (IUP). In this manner, the refresh rate of the information in the first area (W) is higher than the refresh rate in the second area (W).

Driving a bi-stable matrix display device

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Landgraaf, Netherlands

Neculai N Ailenei