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Electrophoretic display device

A technology for electrophoretic display and display equipment, which can be used in instruments, nonlinear optics, optics, etc., and can solve problems such as the increase in the number of electrodes in multi-color display equipment

Inactive Publication Date: 2004-11-10
SIGNIFY HLDG BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Moreover, the number of electrodes required to drive in a multi-color display device increases significantly

Method used

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Embodiment Construction

[0031] figure 1 is the electrical equivalent of a portion of the color display device 1 to which the invention applies. It comprises a matrix of pixels 10 at the intersection regions of row or select electrodes 7 and column or data electrodes 6 . The row electrodes 1 to m are successively selected by the row driver 4 , while the column electrodes 1 to n are supplied with data by the data register 5 . In this example, the pixels in columns 1, 4, 7, ..., n-2 make up the red pixels, the pixels in columns 2, 5, 8, ..., n-1 make up the blue pixels, and column 3 , 6, 9, ..., n pixels constitute green pixels. For this purpose, the input data 2 are first processed, if necessary, in the processor 3 . Mutual synchronization between the row driver 4 and the data register 5 takes place via the drive line 8 .

[0032] Drive signals from row drivers 4 and data registers 5 select pixels 10 (referred to as passive drive). In known devices, the column electrodes 6 receive such a voltage r...

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Abstract

Color selection and grey values are obtained in electrophoretic displays causing pixels, which have a main reservoir (16) surrounded by auxiliary reservoirs (18) for the primary colors and an entrance electrode (13), to move particles to the main display area and further electrodes (14, 26, 27) for grey value selection.

Description

technical field [0001] The invention relates to an electrophoretic display device comprising at least one pixel with an electrophoretic medium in a main reservoir comprising at least one electrode and means by which the pixel can be brought into different optical states. Background technique [0002] Where (switching) electrodes are mentioned in this application, the electrodes may, if desired, be divided into sub-electrodes which are supplied with a common voltage either externally or via switching elements. [0003] Electrophoretic display devices are based on the movement of charged, usually colored particles under the action of an electric field between two extreme states with different light transmittance or light reflection. With these devices, dark (colored) characters can be imaged on a light (colored) background, and vice versa. [0004] Electrophoretic display devices are therefore notably used in display devices that replace the function of paper, so-called "pape...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/167G02F1/16761G02F1/16766
CPCG02F2001/1676G02F1/134363G02F1/167G02F1/16766G02F1/16761G02F1/1685G02F1/1676G02F1/1681
Inventor D·K·G·德博尔M·T·约翰逊
Owner SIGNIFY HLDG BV
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