Laminated structure, a touch display having a laminated structure, and a laminating method thereof

Patent metadata

Field	Value
Publication number	US-9684397-B2
Application number	US-201213469097-A
Country	US
Kind code	B2
Filing date	May 11, 2012
Priority date	Dec 2, 2011
Publication date	Jun 20, 2017
Grant date	Jun 20, 2017

Abstract

A touch display having a laminated structure is provided in present disclosure. The touch display comprises a touch panel, a display module, and a step-shaped gasket element. The display module has a step-shaped structure formed due to a height difference, wherein the step-shaped structure is located in an edge area of the display module. The gasket element inosculates with the step-shaped structure of the display module to fill the height difference in the edge area of the display module. In accordance with present disclosure, the gasket element is not in a suspended state usually caused when the gasket element is not being supported by display module and is effectively laminated to an outer frame of display module, thereby enhancing the reliability of lamination of touch panel and display module. Moreover, a laminated structure and a laminating method for touch display having the laminated structure are provided in present disclosure.

First claim

What is claimed is:

1. A lamination method for a touch display, wherein the lamination method comprises:
providing a display module, wherein:
the display module comprises a polarizer, an outer frame and a display body,
the outer frame has a recess for containing the display body so that the outer frame and the display body construct a planar surface, and
the polarizer is disposed on the planar surface and protrudes therefrom so that the display module has a step-shaped structure defined by a top surface of the display body, a sidewall of the polarizer, and a top surface of the polarizer, and
the step-shaped structure is located in an edge area of the display module;

laminating a step-shaped gasket element to the step-shaped structure in the edge area of the display module to cover a first portion of the polarizer; and
laminating a touch panel to the step-shaped gasket element, wherein:
the top surface of the display body and the top surface of the polarizer face the touch panel,
the step-shaped gasket element supports the touch panel in the edge area of the display module, and
an air gap is formed between the touch panel and the display module.

2. The lamination method for a touch display as claimed in claim 1 , wherein the air gap is formed between the touch panel and the display module in a non-edge area of the display module.

3. The lamination method for a touch display as claimed in claim 1 , wherein:
before the step-shaped gasket element is laminated, a first release film and a second release film are respectively pasted on a top surface and a bottom surface of the step-shaped gasket element,
during lamination of the step-shaped gasket element to the step-shaped structure in the edge area of the display module, the second release film is stripped from the step-shaped gasket element so as to laminate the bottom surface of the step-shaped gasket element with the display module, and
during the lamination of the touch panel to the step-shaped gasket element, the first release film is stripped from the step-shaped gasket element so as to laminate the touch panel onto the top surface of the step-shaped gasket element.

4. The lamination method for a touch display as claimed in claim 1 , wherein the step-shaped gasket element is a one-piece body.

5. The lamination method for a touch display as claimed in claim 1 , wherein the step-shaped gasket element comprises at least two gaskets.

6. The lamination method for a touch display as claimed in claim 3 , wherein the top surface and the bottom surface of the step-shaped gasket element are adhesive surfaces.

7. The lamination method for a touch display as claimed in claim 1 , wherein:
the air gap is formed between the touch panel and a second portion of the polarizer that is not covered by the step-shaped gasket element, and
a gap is formed between edges of the display body and the outer frame.

8. The lamination method for a touch display as claimed in claim 7 , wherein:
the step-shaped gasket element is a double-layer step-shaped structure comprising an upper-layer gasket and a lower-layer gasket,
a bottom surface of the lower-layer gasket is laminated to the planar surface,
a protruding part of the upper-layer gasket is laminated to the polarizer, and
a top surface of the upper-layer gasket is laminated to the touch panel.

9. The lamination method for a touch display as claimed in claim 7 , wherein:
the touch panel comprises a touch sensing substrate having a touch sensing layer and a cover glass,
the touch sensing substrate is laminated to the cover glass by an adhesive,
a bottom surface of the touch sensing substrate is attached to the step-shaped gasket element, and
the air gap is formed between the bottom surface of the touch sensing substrate and the second portion of the polarizer that is not covered by the step-shaped gasket element.

10. A touch display having a laminated structure, comprising:
a touch panel;
a display module, wherein:
the display module comprises a polarizer, an outer frame and a display body,
the outer frame has a recess for containing the display body,
a top surface of the outer frame facing the touch panel and a top surface of the display body facing the touch panel lie in a same plane to define a planar surface, and
the polarizer is disposed on the planar surface and protrudes from the planar surface in a direction toward the touch panel so that the display module has a step-shaped structure located in an edge area of the display module; and

a step-shaped gasket element located between the touch panel and the display module, wherein:
the step-shaped gasket element is located over the step-shaped structure in the edge area of the display module to cover a first portion of the polarizer and to support the touch panel, and
an air gap is formed between the touch panel and the display module.

11. The touch display as claimed in claim 10 , wherein the air gap is formed between the touch panel and the display module in a non-edge area of the display module.

12. The touch display as claimed in claim 10 , wherein the step-shaped gasket element is a one-piece body.

13. The touch display as claimed in claim 10 , wherein the step-shaped gasket element comprises at least two gaskets.

14. The touch display as claimed in claim 10 , wherein:
the step-shaped gasket element has a top surface contacting the touch panel and a bottom surface contacting the display module, and
the top surface and the bottom surface are adhesive surfaces.

15. The touch display as claimed in claim 10 , wherein the air gap is formed between the touch panel and a second portion of the polarizer that is not covered by the step-shaped gasket element.

16. The touch display as claimed in claim 15 , wherein:
the step-shaped gasket element is a double-layer step-shaped structure comprising an upper-layer gasket and a lower-layer gasket,
a bottom surface of the lower-layer gasket is laminated to the planar surface,
a protruding part of the upper-layer gasket is laminated to the polarizer, and
a top surface of the upper-layer gasket is laminated to the touch panel.

17. The touch display as claimed in claim 15 , wherein:
the touch panel comprises a touch sensing substrate having a touch sensing layer and a cover glass,
the touch sensing substrate is laminated to the cover glass by an adhesive,
a bottom surface of the touch sensing substrate is attached to the step-shaped gasket element, and
the air gap is formed between the bottom surface of the touch sensing substrate and the second portion of the polarizer that is not covered by the step-shaped gasket element.

18. The touch display as claimed in claim 17 , wherein a black mask is formed between the cover glass and the touch sensing substrate to define the edge area.

19. The touch display as claimed in claim 10 , wherein the step-shaped gasket element is made of a rubber, a plastic, or a foam.

20. The touch display as claimed in claim 10 , wherein a gap is formed between edges of the display body and the outer frame.

Assignees

• Wu Jia
• Jiang Yau-Chen
• Huang Pingping
• Wang Wei
• Tpk Touch Solutions Xiamen Inc

Inventors

• Wu Jia
• Jiang Yau-Chen
• Huang Pingping
• Wang Wei

Classifications

• G06F3/041 Primary

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• G02F1/133308 Primary

  Support structures for LCD panels, e.g. frames or bezels · CPC title

• G02F2001/13332

  Physics · mapped topic

• G02F1/13338

  Input devices, e.g. touch panels · CPC title

• G02F1/13332

  Front frames · CPC title