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Electrophoretic display device and method of manufacturing electrophoretic display device

一种电泳显示、制造方法的技术，应用在图纹面的照相制版工艺、仪器、光学等方向，能够解决消耗电力增大、显示复杂、电泳显示装置可靠性下降等问题

Inactive Publication Date: 2009-08-26
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the leakage current per pixel is small, it is large when viewed from the display portion of the electrophoretic display device as a whole, which increases power consumption.
Furthermore, if the inverse display area is enlarged and the display becomes complicated accordingly, the power consumption will still increase.
[0007] Moreover, the pixel electrode may cause a chemical reaction due to the generation of leakage current, thereby, especially when used for a long time, the reliability as an electrophoretic display device may decrease.

Method used

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  • Electrophoretic display device and method of manufacturing electrophoretic display device
  • Electrophoretic display device and method of manufacturing electrophoretic display device
  • Electrophoretic display device and method of manufacturing electrophoretic display device

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no. 1 Embodiment approach

[0056] figure 1 , is a configuration diagram showing the first embodiment of the electrophoretic display device of the present invention, figure 1 Reference numeral 1 is an electrophoretic display device. This electrophoretic display device 1 includes a display unit 3 , a scanning line driving circuit 6 , a data line driving circuit 7 , a common power supply modulation circuit 8 , and a controller 10 .

[0057] In the display unit 3 , M pixels 2 along the Y-axis direction and N pixels 2 along the X-axis direction are formed in a matrix. The scanning line drive circuit 6 is connected to the pixels 2 via a plurality of scanning lines 4 ( Y1 , Y2 , . . . , Ym) extending along the X-axis direction on the display unit 3 . The data line drive circuit 7 is connected to the pixels 2 via a plurality of data lines 5 (X1, X2, . . . , Xn) extending along the Y-axis direction on the display unit 3 . The common power supply modulation circuit 8 is connected to the pixels 2 through the co...

no. 2 Embodiment approach

[0124] Figure 12 , is a diagram showing a second embodiment of the electrophoretic display device of the present invention, and is a cross-sectional view of a main part of the display unit 3 .

[0125] This second embodiment is the same as shown in image 3 The difference from the first embodiment lies in the configuration of the insulating layer 31 . ie, shown in Figure 12 The insulating layer 31 covers only the region between the pixel electrodes 21 and 21, and its upper surface protrudes toward the electrophoretic layer 23 side than the upper surface of the pixel electrode 21. However, it does not need to protrude beyond the upper surface of the pixel electrode 21 as long as the leakage current can be sufficiently suppressed.

[0126] Figure 13 , is a plan view of the display portion 3 showing only the insulating layer 31 and the pixel electrode 21 in the second embodiment. The insulating layer 31 is formed along the region between the pixel electrodes 21 in a grid ...

no. 3 Embodiment approach

[0129] Figure 14 , is a diagram showing a third embodiment of the electrophoretic display device of the present invention, and is a cross-sectional view of a main part of the display unit 3 .

[0130] This third embodiment is the same as shown in image 3 The difference of the first embodiment also lies in the configuration of the insulating layer 31 . ie, shown in Figure 14 The insulating layer 31 is formed only in the central part of the region between the pixel electrodes 21 and 21, and is formed away from the pixel electrode 21. Furthermore, the upper surface of the insulating layer 31 protrudes from the upper surface of the pixel electrode 21 toward the electrophoretic layer 23 side.

[0131] Figure 15 , is a plan view of the display unit 3 showing only the insulating layer 31 and the pixel electrode 21 in the third embodiment. The insulating layer 31 is formed in a grid-like shape in plan view as a whole so as to surround the pixel electrodes 21 in the region bet...

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Abstract

The invention relates to electrophoretic display device and method of manufacturing electrophoretic display device inhibiting leakage current among pixels and improving reliability of product. An electrophoretic display device is arranged with pixels with electrophoretic elements in flat, the electrophoretic element comprises a pixel electrode (21), a counter electrode (22) facing the pixel electrode (21), and an electrophoretic layer (23) having electrophoretic particles configured between the pixel electrode (21) and the counter electrode (22). An insulating layer (31) made from photosensitive insulating material is set at the area between adjacent pixel electrodes (21, 21).

Description

technical field [0001] The present invention relates to an electrophoretic display device and a method for manufacturing the electrophoretic display device. Background technique [0002] Conventionally, an electrophoretic display device is known that has an electrophoretic dispersion including a liquid-phase dispersion medium and electrophoretic particles, and utilizes a phenomenon in which the optical properties of the electrophoretic dispersion change due to changes in the distribution state of the electrophoretic particles when an electric field is applied. Such an electrophoretic display device can be reduced in cost and thinned because it does not require a backlight, and in addition to having a wide viewing angle and high contrast ratio, it also has display storage properties, so it is attracting attention as a next-generation display device. [0003] In order to display an image with this electrophoretic display device, a memory circuit temporarily stores an image sig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/167G03F7/00G03F7/027G02F1/16756
CPCG02F1/167G02F1/16756G02F1/16757G02F2202/28
Inventor 阿部裕幸下平泰裕
Owner SEIKO EPSON CORP
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