ELECTROPHORETIC DISPLAY DEVICE, ELECTRONIC APPARATUS, AND METHOD OF MANUFACTURING ELECTROPHORETIC DISPLAY DEVICE

• US 20100177032A1
• Filed: 12/21/2009
• Published: 07/15/2010
• Est. Priority Date: 01/09/2009
• Status: Active Grant

• Current Assignee: E Ink Holdings Incorporated
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Yamada, Hiroyasu
• Granted Patent: US 8,941,582 B2
• Time in Patent Office: Days
• US Class Current: 345/107
• CPC Class Codes: G02F 1/167 by electrophoresis
• CPC Class Codes: G02F 1/16755 Substrates
• CPC Class Codes: G02F 1/16756 Insulating layers

Abstract

An electrophoretic display device includes: first and second substrates; an electrophoretic layer which is interposed between the first and second substrates; and a third substrate which is disposed opposite the first substrate with the second substrate interposed therebetween, which is joined to the first substrate with a sealing member interposed therebetween, and which seals the electrophoretic layer with the second substrate interposed therebetween. The first and third substrates have extension sections extending with respect to the second substrate in a plan view. The sealing member fills a part of a gap between the extension section of the first substrate and the extension section of the third substrate, and the sealing member does not come into contact with an outer edge of the third substrate.

Claims

1. An electrophoretic display device comprising:

first and second substrates;

an electrophoretic layer which is interposed between the first and second substrates; and

a third substrate which is disposed opposite the first substrate with the second substrate interposed therebetween, which is joined to the first substrate with a sealing member interposed therebetween, and which seals the electrophoretic layer with the second substrate interposed therebetween,

wherein the first and third substrates have extension sections extending with respect to the second substrate in a plan view,

wherein the sealing member fills a part of a gap between the extension section of the first substrate and the extension section of the third substrate, and

wherein the sealing member does not come into contact with an outer edge of the third substrate.

2. The electrophoretic display device according to claim 1, wherein a member having an elastic modulus smaller than that of the sealing member is disposed in the gap.

3. The electrophoretic display device according to claim 1, wherein edge portions of the first and third substrates facing the gap are chamfered.

4. The electrophoretic display device according to claim 1,

wherein a connection terminal connecting an external circuit is disposed on at least one side of the extension sections of the first substrate, and

wherein the extension section in which the connection terminal is disposed is longer than the other extension sections.

5. An electronic apparatus comprising the electrophoretic display device according to claim 1.

6. A method of manufacturing an electrophoretic display device, comprising:

disposing respective electrophoretic layers of plural panel areas each corresponding to one electrophoretic display device on a first mother substrate;

disposing dam members between the adjacent electrophoretic layers on the first mother substrate in a state where gaps are formed between the dam members and the electrophoretic layers;

attaching a second mother substrate to the first mother substrate close to the electrophoretic layers;

forming sealing members by filling a sealing material into areas surrounded by the first mother substrate, the second mother substrate, the dam members, and the electrophoretic layers and hardening the sealing material; and

cutting the first and second mother substrates along the areas where the dam members are disposed,

wherein an elastic modulus of the dam member is smaller than an elastic modulus of the sealing member.

7. A method of manufacturing an electrophoretic display device, comprising:

disposing respective electrophoretic layers of plural panel areas each corresponding to one electrophoretic display device on a first mother substrate;

disposing dam members between the adjacent electrophoretic layers on the first mother substrate in a state where gaps are formed between the dam members and the electrophoretic layers;

attaching a second mother substrate to the first mother substrate close to the electrophoretic layers;

forming sealing members by filling a sealing material into areas surrounded by the first mother substrate, the second mother substrate, the dam members, and the electrophoretic layers and hardening the sealing material;

cutting the first and second mother substrates along the areas where the dam members are disposed; and

removing the dam members after cutting the first and second mother substrates.