Display device and hand-held electronic device

• US 9,013,653 B2
• Filed: 09/06/2013
• Issued: 04/21/2015
• Est. Priority Date: 12/26/2005
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Japan Display Incorporated, Panasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
• Inventors: Fukuda, Koichi
• Primary Examiner(s): Vu, Phu
• Application Number:
  US14/020,331
• Publication Number:
  US 20140009727A1
• Time in Patent Office: 592 Days
• Field of Search: 349/58, 349/96
• US Class Current: 349/58
• CPC Class Codes: G02F 1/1333 Constructional arrangements; Manufacturing methodsG02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells
• CPC Class Codes: G02F 2201/50 Protective arrangements

Abstract

An electronic device includes a liquid crystal display device having a first substrate, a second substrate bonded to the first substrate, with liquid crystal material held between the first substrate and the second substrate, and an upper polarizing plate affixed to the second substrate. A protective member is disposed over the upper polarizing plate, and an adhesive member is disposed between the protective member and the upper polarizing plate without an air layer between the protective member and the upper polarizing plate. The protective member is configured as a protective cover of the electronic device.

Claims

1. A liquid crystal display device used in a hand-held electronic device comprising:

a first substrate comprising a TFT;

a second substrate bonded to the first substrate;

the first substrate and the second substrate being bonded by a sealing material;

liquid crystal material held between the first substrate and the second substrate;

an upper polarizing plate fixed to the second substrate;

a protective member, which is a member separate from the upper polarizing plate, disposed over the upper polarizing plate; and

an adhesive member disposed between the protective member and the upper polarizing plate and without an air layer between the protective member and the upper polarizing plate;

wherein the protective member is a protective cover of the hand-held electronic device; and

wherein the sealing material and the protective member overlap in plan view.

2. A liquid crystal display device according to claim 1, wherein a surface pencil hardness of the protective member is at least 3H.

3. A liquid crystal display device according to claim 2, wherein an upper surface of the second substrate is bonded to a sheath of the hand-held electronic device.

4. A liquid crystal display device according to claim 2, wherein an upper surface of the upper polarizing plate is bonded to a sheath of the hand-held electronic device.

5. A liquid crystal display device according to claim 1, wherein a thickness of the second substrate is no greater than 0.5 mm.

6. A liquid crystal display device according to claim 5, wherein a thickness of the protective member is at least 0.2 mm and no greater than 1.0 mm.

7. A liquid crystal display device according to claim 6, wherein a surface pencil hardness of the protective member is at least 3H.

8. A liquid crystal display device according to claim 7, wherein an upper surface of the second substrate is bonded to a sheath of the hand-held electronic device.

9. A liquid crystal display device according to claim 7, wherein an upper surface of the upper polarizing plate is bonded to a sheath of the hand-held electronic device.

10. A display device used in a hand-held electronic device comprising:

a TFT substrate,

a counter substrate bonded to the TFT substrate;

a polarizing plate disposed over the counter substrate;

a protective member, which is a member separate from the polarizing plate, disposed over the polarizing plate; and

an adhesive member disposed between the protective member and the polarizing plate and without an air layer between the protective member and the upper polarizing plate;

wherein the protective member is a protective cover of the hand-held electronic device; and

wherein the protective cover overlaps with an area where the counter substrate is bonded to the TFT substrate in plan view.

11. A display device according to claim 10, wherein a thickness of the counter substrate is no greater than 0.5 mm.

12. A display device according to claim 11, wherein a thickness of the protective member is at least 0.2 mm and no greater than 1.0 mm.

13. A display device according to claim 12, wherein a surface pencil hardness of the protective member is at least 3H.

14. A display device according to claim 13, wherein an upper surface of the counter substrate is bonded to a sheath of the hand-held electronic device.

15. A display device according to claim 12, wherein an upper surface of the upper polarizing plate is bonded to a sheath of the hand-held electronic device.

16. A hand-held electronic device comprising:

a display device used in a hand-held electronic device comprising;

a TFT substrate;

a counter substrate bonded to the TFT substrate;

a polarizing plate disposed over the counter substrate;

a protective member, which is a member separate from the polarizing plate, disposed over the polarizing plate; and

an adhesive member disposed between the protective member and the polarizing plate and without an air layer between the protective member and the polarizing plate;

wherein the protective member is a protective cover of the hand-held electronic device; and

wherein the protective cover overlaps with an area where the counter substrate is bonded to the TFT substrate in plan view.

17. A hand-held electronic device according to claim 16, wherein a thickness of the counter substrate is no greater than 0.5 mm.

18. A hand-held electronic device according to claim 16, wherein a surface pencil hardness of the protective member is 3H or harder.

19. A hand-held electronic device according to claim 16, wherein a thickness of the protective cover is at least 0.2 mm and no greater than 1.0 mm.