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Electrophoretic display device

A technology of electrophoretic display and display device, which is applied in the direction of static indicators, instruments, nonlinear optics, etc., and can solve the problems of introducing gray values ​​and slow speed of electrophoretic display devices, etc.

Inactive Publication Date: 2008-08-06
SIGNIFY HLDG BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, electrophoretic display devices are too slow to introduce grayscale values ​​via time-weighted drive cycles (time-ratio grayscale)

Method used

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  • Electrophoretic display device
  • Electrophoretic display device
  • Electrophoretic display device

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0024] Fig. 1 shows the electrical equivalent of a part of a display device 1 to which the invention is applied. It comprises a matrix of pixels 10 at the intersection regions of row or select electrodes 7 and column or data electrodes 6 . The 1 to m row electrodes are successively selected by the row driver 4 , and the 1 to n column electrodes are supplied with data by the data register 5 . For this purpose, the input data 2 are first processed, if necessary, in the processor 10 . Mutual synchronization between the row driver 4 and the data register 5 takes place via the driver line 8 .

[0025] Drive signals from row drivers 4 and data registers 5 select pixels 10 (referred to as passive drive). In known arrangements, the column electrodes 6 take on such voltages with respect to the row electrodes 7 that the pixel assumes one of two extreme states (e.g., black or colored, depending on the liquid and electrophoretic particles) in the area of ​​intersection. color).

[002...

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PUM

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Abstract

In electrophoretic displays, grey values are realized by introducing a further electrode (6') in addition to the conventional electrodes (6, 7) for bistable operation.

Description

technical field [0001] The invention relates to an electrophoretic display device comprising at least one pixel with an electrophoretic medium and two switching electrodes, as well as a drive device whereby the pixel can be brought into different optical states. Where a switching electrode is mentioned in this application, it can, if desired, be divided into a plurality of sub-electrodes which are supplied with the same voltage either externally or via the switching element. Background technique [0002] Electrophoretic display devices are based on the movement of charged, usually colored particles under the influence of an electric field between two extreme states of different transmittance or reflectance. With these display devices, dark (colored) characters can be imaged on a light (colored) background, and vice versa. [0003] Electrophoretic display devices are therefore prominently used in display devices that take over the function of paper, ie so-called "white paper...

Claims

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Application Information

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IPC IPC(8): G02F1/167G02F1/16757G02F1/16762G02F1/16766G09G3/20G09G3/34
CPCG02F2001/1676G02F1/167G09G3/3446G09G3/2014G09G3/344G09G2300/08G09G2310/0205G09G2310/0275G09G2310/06G09G2310/061G09G2310/068G09G2320/04G02F1/16766G02F1/16762G02F1/16757
Inventor M·T·约翰森D·K·G·德贝尔
Owner SIGNIFY HLDG BV