DISPLAY APPARATUS WITH PROTECTION PLATE AND MANUFACTURING METHOD THEREOF

• US 20110007391A1
• Filed: 07/06/2010
• Published: 01/13/2011
• Est. Priority Date: 07/08/2009
• Status: Active Grant

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: Casio Computer Company Limited
• Inventors: TAKAHASHI, Masayuki
• Granted Patent: US 8,411,224 B2
• Time in Patent Office: Days
• US Class Current: 359/485
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/133311 Environmental protection, e.g. against dust or humidity
• CPC Class Codes: G02F 1/133325 Assembling processes
• CPC Class Codes: G02F 1/133331 Cover glasses
• CPC Class Codes: G02F 2201/50 Protective arrangements
• CPC Class Codes: G02F 2202/023 curable
• CPC Class Codes: G02F 2202/025 thermocurable
• CPC Class Codes: G02F 2202/28 Adhesive materials or arrangements

Abstract

Disclosed is a display apparatus with a protection plate including a display panel including a first transparent substrate, an adhesion layer arranged so as to overlap with an entire screen area of the display panel, the protection plate fixed to the display panel by the adhesion layer in a state where the adhesion layer intervening between the protection plate and the first transparent substrate and a cured bonding layer which directly contacts the display panel and the protection plate and which is provided on a circumference of the adhesion layer, and at least one aperture making a region in one side on which the screen area of the display panel is arranged with respect to the bonding layer and a region in the other side opposite to the one side with respect to the bonding layer communicate with each other is provided in the bonding layer.

Claims

1. A display apparatus with a protection plate, comprising:

a display panel including a first transparent substrate;

an adhesion layer arranged so as to overlap with an entire screen area of the display panel;

the protection plate fixed to the display panel by the adhesion layer in a state where the adhesion layer intervening between the protection plate and the first transparent substrate; and

a cured bonding layer which directly contacts the display panel and the protection plate and which is provided on a circumference of the adhesion layer, wherein

at least one aperture making a region in one side on which the screen area of the display panel is arranged with respect to the bonding layer and a region in the other side opposite to the one side with respect to the bonding layer communicate with each other is provided in the bonding layer.

2. The display apparatus with the protection plate according to claim 1, wherein

the bonding layer is provided so as to enclose the adhesion layer.

3. The display apparatus with the protection plate according to claim 1, wherein

the bonding layer is composed of a plurality of parts which are arranged along an outer periphery of the adhesion layer.

4. The display apparatus with the protection plate according to claim 1, wherein

the adhesion layer is rectangular, and

the bonding layer is provided in a region next to the rectangular adhesion layer except for a region next to at least one corner part of the rectangular adhesion layer, and

the aperture portion is provided in the region next to the corner part of the rectangular adhesion layer.

5. The display apparatus with the protection plate according to claim 1, wherein

the adhesion layer is rectangular, and

the bonding layer is provided along a bonding layer provided side which is one of the sides of the rectangular adhesion layer over the whole length of the bonding layer provided side.

6. The display apparatus with the protection plate according to claim 5, wherein

the bonding layer is provided along a predetermined part of the bonding layer provided side of the rectangular adhesion layer, and the aperture portion is provided along a residual part of the bonding layer provided side except for the predetermined part.

7. The display apparatus with the protection plate according to claim 1, wherein

the display panel further comprising:

a second transparent substrate which is pasted to the first transparent substrate via a liquid crystal layer; and

an optical sheet which is pasted to the second transparent substrate so as to overlap the entire screen area of the display panel in a state where the second transparent substrate intervening between the first transparent substrate and the optical sheet.

8. The display apparatus with the protection plate according to claim 7, wherein

the adhesion layer is arranged so as to be superposed on the entire optical sheet.

9. The display apparatus with the protection plate according to claim 7, wherein

joining strength between the protection plate and the optical sheet via the adhesion layer is smaller than joining strength between the second transparent substrate and the optical sheet via an adhesive compound for the optical sheet to fix the optical sheet and the second transparent substrate to each other.

10. The display apparatus with the protection plate according to claim 7, wherein

the optical sheet includes a polarizing plate and a phase plate which is intervened between the polarizing plate and the second transparent substrate.

11. The display apparatus with the protection plate according to claim 7, further comprising a surface light source which is arranged on an opposite side to a side on which the protection plate is arranged with respect to the display panel, which is for irradiating an illumination light to the display panel.

12. The display apparatus with the protection plate according to claim 1, wherein

bonding strength between the cured bonding layer and each of the display panel and the protection plate is larger than bonding strength between the adhesion layer and each of the display panel and the protection plate.

13. A manufacturing method of a display apparatus with a protection plate, comprising:

preparing a display panel having a transparent substrate and a protection plate which is fixed to the display panel;

forming an adhesion layer for pasting the display panel and the protection plate together so as to superpose the adhesion layer on an entire screen area of the display panel, the adhesion layer being formed on either a surface of the display panel on a side arranged to be opposed to the protection plate or a surface of the protection plate on a side arranged to be opposed to the display panel;

pasting the display panel and the protection plate together with the adhesion layer intervening therebetween;

forming a bonding layer by making an uncured bonding layer directly contact each of both of the display panel and the protection plate so as to form an aperture at a circumference of the adhesion layer to enable a region on one side of on which the screen area of the display panel is arranged with respect to an outer periphery of the adhesion layer and a region on the other side opposite to the one side with respect to the outer periphery of the adhesion layer to communicate with each other; and

fixing the display panel and the protection plate to each other by curing the uncured bonding layer.

14. The manufacturing method of the display apparatus with the protection plate according to claim 13, wherein

bonding strength between the cured bonding layer and each of the display panel and the protection plate is larger than bonding strength between the adhesion layer and each of the display panel and the protection plate.