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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 it is difficult to uniformly set the sealing material over a wide range
Inhomogeneity is often difficult to avoid
In addition, in larger size devices, the occurrence of non-uniformity is more significant

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

Embodiment 1

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

[0166]The resulting display device had 200 x 600 pixels, each pixel having a size of 240 μm x 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 disposed between adjacent partition walls 20 and connected to the switching 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 of 0.1 mm thick. The substrate is then coated with an insulating layer of acrylic resin, and the insulating layer is provided with contact holes. After that, on the insulating layer, a resist pattern for scattering incident light is formed, and an alu...

Embodiment 2

[0178] An electric display device was fabricated in the same manner as in Example 1 except that the supporting member 130 was removed from the sealing film 30 and the sealing film 30 was exposed to ambient air.

[0179] When the display device was driven in the same manner as in Embodiment 1, the display device exhibited the same display state change as in Embodiment 1. When the display device was driven, it was not observed that the electrophoretic particles 50 moved so as to overflow the partition walls 20 . In addition, peeling of the sealing film 30 from the partition wall 20 side and volatilization of the dispersion medium 40 were not observed, proving that the sealing film 30 and the partition wall 20 were adhered to each other.

[0180] Thus, although the display device was bent backward and forward, the phenomenon that the electrophoretic particles 50 moved so as to overflow the partition walls was not observed. In addition, the driving of the display device was evalu...

Embodiment 3

[0182] An electric display device was prepared in the same manner as in Example 1, except that the sealing film matrix 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 has a specific gravity greater than that of Isoper H.

[0183] When the resulting display device was driven in the same manner as in Example 1, the same display state change as in Example 1 was observed. Even if the display device was driven continuously, it was not observed that the electrophoretic particles 50 moved so as to overflow the partition walls 20 . In addition, the sealing film 30 was not peeled off from the partition wall side.

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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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