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An electrophoretic display with improved image quality using rest pulses and hardware driving

A residual pulse, hardware-driven technique used in static indicators, instruments, etc.

Inactive Publication Date: 2006-10-18
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Power consumption only when the display needs to be refreshed or updated with new information

Method used

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  • An electrophoretic display with improved image quality using rest pulses and hardware driving
  • An electrophoretic display with improved image quality using rest pulses and hardware driving
  • An electrophoretic display with improved image quality using rest pulses and hardware driving

Examples

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Embodiment Construction

[0024] figure 1 with figure 2 It is an embodiment of a part of a display screen 1 of an electronic reading device having a first substrate 8 , a second opposite substrate 9 and a plurality of picture elements 2 . The picture elements 2 may be arranged along a substantially straight line in a two-dimensional structure. For the sake of clarity, the picture elements 2 are shown separated from each other, but in reality, the picture elements 2 are very close to each other so as to form a continuous picture. In addition, only a part of the full display screen is shown in the figure. Image elements in other arrangements may also be used, such as a honeycomb arrangement. An electrophoretic medium 5 with charged particles 6 is interposed between the substrates 8 and 9 . A first electrode 3 and a second electrode 4 are associated with each picture element 2 . Electrodes 3 and 4 are able to receive a potential difference. figure 2 In , for each picture element 2 , the first subs...

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PUM

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Abstract

Displaying images (310) in bistable electronic reading devices (300, 400) such as employing electrophoretic displays by applying residual pulses (R1, R2) close to and following hardware drive pulses (S1, S2) Image quality has been improved when updating. The voltage of the remaining pulses (R1, R2) is zero, or a value below the threshold for moving the particles forming the bistable display.

Description

technical field [0001] The present invention relates generally to electronic reading devices such as electronic books and electronic newspapers, and more particularly to methods and apparatus for updating images with improved image quality using drive waveforms including residual pulses. Background technique [0002] Technological advances in recent years have provided some "user-friendly" electronic reading devices, such as e-books, which have opened up many opportunities. For example, electrophoretic displays hold this promise. Such displays have inherent memory performance and are able to hold an image for a substantial period of time without power consumption. Power is only consumed when the display needs to be refreshed or updated with new information. Therefore, the power consumption in such a display is very low, suitable for use as a portable electronic reading device like electronic books and electronic newspapers. Electrophoresis refers to the movement of charge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/34
CPCG09G3/344G09G2300/08G09G2310/061G09G2310/065G09G2310/068
Inventor G·周M·T·约翰逊N·埃勒奈J·范德卡默
Owner KONINKLIJKE PHILIPS ELECTRONICS NV