US 2006/0187186 A1 · Electrophoretic display panel

Abstract

The electrophoretic display panel (1) for displaying pictures has drive means (100) which are arranged for controlling the potential difference of each picture element (2) to be a picture potential difference having a picture value and an associated picture duration representing a picture energy for enabling the particles (6) to occupy one of the positions for displaying one of the pictures, subsequently to be an inter-picture potential difference having an inter-picture value and an associated inter-picture duration representing an inter-picture energy and subsequently to be a subsequent picture potential difference for enabling the particles (6) to occupy one of the positions for displaying a subsequent one of the pictures. For the display panel (1) to be able to subsequently display pictures of at least relatively medium quality and to have a reduced visibility of the inter-picture appearances of the picture elements (2), the drive means (100) are arranged for controlling for each picture element (2) the inter-picture value to have a sign opposite to a sign of the picture value, the inter-picture energy to be insufficient to substantially change the position of the particles (6) and chosen in a range from larger than zero to substantially equal to the picture energy for reducing an undesired charge accumulation in the picture element (2).

Claims8

Dependent claims

An electrophoretic display panel (1) for displaying pictures, comprising:

an electrophoretic medium (5) comprising charged particles (6) in a fluid;
a plurality of picture elements (2);
a first and a second electrode (3,4) associated with each picture element (2) for receiving a potential difference;
and
drive means (100),
the charged particles (6) being able to occupy a position being one of a number of positions between the electrodes (3,4), and
the drive means (100) being arranged for controlling the potential difference of each picture element (2)
to be a picture potential difference having a picture value and an associated picture duration representing a picture energy for enabling the particles (6) to occupy one of the positions for displaying one of the pictures, subsequently
to be an inter-picture potential difference having an inter-picture value and an associated inter-picture duration representing an inter-picture energy and subsequently
to be a subsequent picture potential difference for enabling the particles (6) to occupy one of the positions for displaying a subsequent one of the pictures, characterized in that
the drive means are arranged for controlling for each picture element (2) the inter-picture value to have a sign opposite to a sign of the picture value and the inter-picture energy to be insufficient to substantially change the position of the particles (6) and chosen in a range from larger than zero to substantially equal to the picture energy for reducing an undesired charge accumulation in the picture element (2).

8 more elements

Dependencies are inferred from the claim text.

Electrophoretic display panel

Life of this patent

Electrophoretic display panel

Life of this patent

Abstract

Claims8