Display device with an adhesion layer and a thin glass layer on adhesion layer and method of manufacturing the same

• US 6,977,710 B2
• Filed: 11/19/2004
• Issued: 12/20/2005
• Est. Priority Date: 03/26/2002
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Nakajima, Mitsuo, Hara, Yujiro, Hioki, Tsuyoshi, Onozuka, Yutaka, Akiyama, Masahiko
• Primary Examiner(s): CHOWDHURY, TARIFUR RASHID
• Application Number:
  US10/991,479
• Publication Number:
  US 20050094071A1
• Time in Patent Office: 396 Days
• Field of Search: 349/42, 349/45, 349/122, 349/158, 349149-152, 349/43, 257/59, 257/72
• US Class Current: 349/158
• CPC Class Codes: G02F 1/133305 Flexible substrates, e.g. plastics, organic film
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: G02F 1/13613 the semiconductor element being formed on a first substrate and thereafter transferred to the final cell substrate
• CPC Class Codes: H10K 50/841 Self-supporting sealing arrangements
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/8428 Vertical spacers, e.g. arranged between the sealing arrangement and the OLED
• CPC Class Codes: H10K 59/8722 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 59/8723 Vertical spacers, e.g. arranged between the sealing arrangement and the OLED

Abstract

A display device comprises a first plastic substrate, a first adhesion layer formed in a first region of the first plastic substrate, the first region being a region where a pixel region is to be formed thereon, a second adhesion layer formed in a peripheral region outside of the first region of the first plastic substrate, a first thin glass layer formed on the first and second adhesion layers, a plurality of active elements formed on the first thin glass layer in one-to-one relation with a plurality of pixels, a display part formed on the first thin glass layer, the display part corresponding to the pixel region and being driven by the plurality of active elements, and an opposing substrate formed over the display part.

Claims

1. A display device comprising:

a first plastic substrate provided for at least a pixel region;

a third plastic substrate provided for a peripheral region outside of the pixel region;

a linear expansion coefficient of the third plastic substrate being smaller than a linear expansion coefficient of the first plastic substrate;

an adhesion layer formed at least on the first plastic substrate;

a first thin glass layer formed on the adhesion layer;

a plurality of active elements formed on the first thin glass layer in one-to-one relation with a plurality of pixels;

a display part formed on the first thin glass layer, the display part corresponding to the pixel region and being driven by the plurality of active elements; and

an opposing substrate formed over the display part.

2. The device according to claim 1, wherein the linear expansion coefficient of the first plastic substrate is 30 ppm/°

C. (inclusive) to 300 ppm/°

C. (inclusive), and linear expansion coefficient of the third plastic substrate is not more than ⅔

that of the first plastic substrate, and is 1 ppm/°

C. (inclusive) to 30 ppm/°

C. (exclusive).

3. The device according to claim 1, wherein a front surface of the first plastic substrate is bonded to both of the display part and the peripheral region, and the third plastic substrate is bonded to a rear surface of the first plastic substrate at the peripheral region thereof.

4. The device according to claim 1, wherein a thickness of the first thin glass layer is not more than 150 μ

m.

5. The device according to claim 1, wherein the adhesion layer comprises a first adhesion layer applied for the pixel region, and a second adhesion layer applied for the peripheral region.

6. The device according to claim 5, wherein a glass transition temperature of the first adhesion layer is 30°

C. (inclusive) to 80°

C. (inclusive), and a glass transition temperature of the second adhesion layer is higher by not less than 10°

C. than that of the first adhesion layer, and is 80°

C. (exclusive) to 200°

C. (inclusive).

7. The device according to claim 1, wherein a total area of the first and third plastic substrates is larger than that of the first thin glass layer when viewed in a direction perpendicular to the first thin glass layer.

8. The device according to claim 7, further comprising a protective layer formed on the peripheral region of the third plastic substrate to cover those side surfaces of the display part, which include the side surfaces of the first thin glass layer.

9. The device according to claim 1, further comprising, in the pixel region, a plurality of adhesive resin members which couple the first thin glass layer and the opposing substrate with a spacing therebetween.

10. The device according to claim 1, further comprising a second plastic substrate provided on an upper surface of the opposing substrate, the upper surface being on an opposite side to the display part, the opposing substrate being formed of a second thin glass layer.