Process for producing electrophoresis display device

A manufacturing method and electro-display technology, which can be applied to instruments, nonlinear optics, optics, etc., can solve the problems of uniformly setting sealing materials, narrowing the selection range of sealing film materials, and limiting the specific gravity of sealing materials, and achieve the effect of good adhesion.

Inactive Publication Date: 2005-12-07
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Second, there is a problem that the specific gravity of the sealing material is limited, thereby narrowing the selection range of sealing membrane materials
[0009] Third, there is a problem that

Method used

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  • Process for producing electrophoresis display device
  • Process for producing electrophoresis display device
  • Process for producing electrophoresis display device

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0164] Example 1

[0165] preparation figure 1 The electric display device shown in.

[0166]The resulting display device has 200×600 pixels, and each pixel has a size of 240 μm×80 μm. Each pixel is surrounded by a partition wall 20 having a width of 8 μm and a height of 28 μm. The first electrode 60 is provided between adjacent partition walls 20 and is connected to the switch device 80. The second electrode 70 is provided between the partition wall 20 and the substrate 10. The second electrode 70 is an electrode common to all pixels.

[0167] Will refer to image 3 -5 and 10 describe the specific manufacturing method of the display device in this embodiment.

[0168] The switching device 80 is formed on a stainless steel substrate 10 having a thickness of 0.1 mm. The substrate is then coated with an acrylic resin insulating layer, and the insulating layer is provided with contact holes. After that, on the insulating layer, a resist pattern for scattering incident light is for...

Example Embodiment

[0177] Example 2

[0178] Except for removing the support member 130 from the sealing film 30 and exposing the sealing film 30 to the surrounding air, an electric display device was prepared in the same manner as in Example 1.

[0179] When the display device is driven in the same manner as in Embodiment 1, the display device exhibits the same display state change as in Embodiment 1. When the display device was driven, no phenomenon in which the electrophoretic particles 50 moved to overflow the partition wall 20 was observed. In addition, peeling of the sealing film 30 from the side of the partition wall 20 and volatilization of the dispersion medium 40 were not observed, which proved that the sealing film 30 and the partition wall 20 were adhered to each other.

[0180] Thus, even though the display device is bent backward and forward, no phenomenon is observed that the electrophoretic particles 50 move so as to overflow the partition wall. In addition, in the state where the ...

Example Embodiment

[0181] Example 3

[0182] An electric display device was prepared in the same manner as in Example 1, except that the sealing film precursor was changed to polyethylene glycol methacrylate (trade name: "PE200"; specific gravity: not less than 1; manufactured by Nippon Yushi K.K.). Methacrylate is insoluble in Isoper H, and its specific gravity is greater than that of Isoper H.

[0183] When the resulting display device was driven the same as in Example 1, the same display state change as in Example 1 was observed. Even if the display device is continuously driven, no phenomenon that the electrophoretic particles 50 move so as to overflow the partition wall 20 is not observed. In addition, the sealing film 30 did not peel off from the partition wall side.

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PUM

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Abstract

An electric display device of the type wherein a dispersion liquid (40) comprising at least a dispersion medium and electrophoretic particles (50) is disposed in a space defined by a substrate (10), a partition wall (20) disposed on the substrate, and a sealing film (30) disposed on an upper end portion (90) of the partition wall is produced through a process including a step of disposing a sealing film precursor (120), comprising a polymerizable compound, supported by a supporting member (130) on both an exposed surface of the dispersion liquid and at least a part of the upper end portion (90) of the partition wall (20) in a state that the dispersion liquid is filled between adjacent partition walls, and a step of polymerizing the polymerizable compound to form the sealing film (30).

Description

technical field [0001] The invention relates to a manufacturing method of an electric display device reflecting the distribution state of an electrophoretic particle group in a certain display state. Background technique [0002] When an electric field is provided to the charged electrophoretic particles in an insulating liquid, the electrophoretic particles move under the action of electrophoresis. In recent years, electrophoretic displays (EPDs) utilizing this electrophoretic phenomenon have been widely developed. Compared with liquid crystal display devices, EPDs have advantages such as high display contrast, viewing angle independence, display state memory, flexible device structure, and no backlight or polarizer is required. [0003] As described above, the electrophoretic particles are dispersed in the liquid, so that the electrophoretic particles easily move in the direction of the substrate surface by diffusion or the like. Such movement causes deterioration of dis...

Claims

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Application Information

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IPC IPC(8): G02F1/167
Inventor 武田俊彦
Owner CANON KK
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