Electrophoretic display panel
AssigneeKoninklijke Philips Electronics N.V.
InventorsGuofu Zhou, Mark Johnson, Neculai Ailenei
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Abstract
An electrophoretic display panel (1), comprises drive means (100), for controlling the potential difference of each picture element (2) to be a reset potential difference having a reset value and a reset duration for enabling particles (6) to substantially occupy one of the extreme positions. The reset pulses are applied in two or more pulses separated by a non-zero time interval during a reset period (Preset).
Claims14
An electrophoretic display panel (1), comprising:
- an electrophoretic medium (5) comprising charged particles (6);
- a plurality of picture elements (2);
- electrodes (3, 4) associated with each picture element (2) for receiving a potential difference;
- and
- drive means (100), the drive means (100) being arranged for controlling the potential difference of each picture element (2)
- to be a reset potential difference having a reset value and a reset duration for enabling particles (6) to substantially occupy one of the extreme positions, and subsequently
- to be a picture potential difference for enabling the particles (6) to occupy the position corresponding to the image information, characterized in that the drive means (100) are further arranged for application of the reset potential difference for resetting a picture element from one optical state to an extreme optical state in two or more pulses separated by a non-zero time interval during a reset period (Preset).
A method for driving an electrophoretic display device comprising:
- an electrophoretic medium (5) comprising charged particles (6);
- a plurality of picture elements (2), in which method reset pulses are applied to elements of the display device, prior to application of grey scale data, for resetting picture elements characterized in that the reset potential difference for resetting a picture element from an optical state to an extreme optical state is applied in two or more pulses separated by a non-zero time interval during a reset period (Preset).
Drive means (100) for driving an electrophoretic display panel (1), said display panel (l) comprising:
- an electrophoretic medium (5) comprising charged particles (6);
- a plurality of picture elements (2);
- and
- electrodes (3, 4) associated with each picture element (2) for receiving a potential difference;
- said drive means (100) being arranged for controlling the potential difference of each picture element (2)
- to be a reset potential difference having a reset value and a reset duration for enabling particles (6) to substantially occupy one of the extreme positions, and subsequently
- to be a picture potential difference for enabling the particles (6) to occupy the position corresponding to the image information, said drive means (100) being further arranged for application of the reset potential difference for resetting a picture element from one optical state to an extreme optical state in two or more pulses separated by a non-zero time interval during a reset period (Preset).
Dependencies are inferred from the claim text.