INTEGRATING EMI SHIEL IN LIQUID CRYSTAL DISPLAY DEVICES

• US 20130002994A1
• Filed: 03/28/2012
• Published: 01/03/2013
• Est. Priority Date: 05/23/2005
• Status: Abandoned Application

• Current Assignee: Min-Shine Chow Wang, Ran-Hong Raymond Wang
• Original Assignee: Min-Shine Chow Wang, Ran-Hong Raymond Wang
• Inventors: Wang, Ran-Hong Raymond, Wang, Min-Shine Chow
• Application Number:
  US13/433,223
• Publication Number:
  US 20130002994A1
• Time in Patent Office: Days
• US Class Current: 349/96
• CPC Class Codes: G02F 1/133334 Electromagnetic shields
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133502 Antiglare, refractive index matching layers
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G02F 1/133531 characterised by the arrangement of polariser or analyser axes
• CPC Class Codes: G02F 1/133541 Circular polarisers
• CPC Class Codes: G02F 1/13363 Birefringent elements, e.g. for optical compensation
• CPC Class Codes: G02F 1/133638 Waveplates, i.e. plates with a retardation value of lambda/n
• CPC Class Codes: G02F 2201/50 Protective arrangements
• CPC Class Codes: G02F 2413/03 Number of plates being 3
• CPC Class Codes: G02F 2413/07 All plates on one side of the LC cell

Abstract

Certain embodiments of liquid crystal display protection panels and liquid crystal display protection panel integrals have low reflection for outdoor applications. Various embodiments also have the advantage of being able to provide efficient EMI shielding for touch panels without substantially degrading touching force.

Claims

1. A touch panel integrated assembly providing an EMI shielding effect comprising:

a touch panel module defining vertical and horizontal axes, said touch panel module having a module front surface configured to sense touches;

a sheet member forward said touch panel module, and

an ITO film, a form of mesh, or a mesh containing sheet positioned between said front surface of said touch panel module and said sheet member, said ITO film, mesh, or mesh sheet being grounded and having an EMI shielding effect.

2. The assembly of claim 1, wherein said sheet member comprises an anti-reflection treatment.

3. The assembly of claim 1, wherein said sheet member comprises a linear polarizer PA, wherein said linear polarizer PA has a linear polarization axis PAX.

4. The assembly of claim 1, wherein said sheet member comprises a retarder layer RA, wherein said retarder layer RA has a retardance of about (2n+1)λ

/4 and a first slow axis RAX, where n is an integer and λ

is 400 nm to 700 nm.

9. A display touch panel integral comprising:

the touch panel integrated assembly of claim 1, and

a liquid crystal display, said liquid crystal display comprising, from front to the back, a linear polarizer PB, a liquid crystal cell sandwiched between two sheets of transparent electrodes, and a backlight module, said linear polarizer PB having a linear polarization axis PCB.

10. The display integral of claim 9, wherein said sheet member comprises an anti-reflection treatment.

11. The display integral of claim 9, wherein said sheet member comprises a linear polarizer PA, wherein said linear polarizer PA has a linear polarization axis PAX.

12. The display integral of claim 9, wherein said sheet member comprises a retarder layer RA, wherein said retarder layer RA has a retardance of about (2n+1)λ

/4 and a first slow axis RAX, where n is an integer and λ

is 400 nm to 700 nm.

17. The assembly of claim 3 further comprising a retarder rearward said touch panel module.

18. The assembly of claim 3 further comprising a heater rearward said touch panel module.

19. The assembly of claim 17 further comprising a heater rearward said touch panel module.

20. The assembly of claim 9, further comprising a retarder rearward said touch panel module.

21. The assembly of claim 1, wherein said sheet member comprises a multilayer structure.

5. An assembly including a capacitive type of touch panel having an EMI shielding effect comprising:

a capacitive type of touch panel having a front surface configured to sense touches; and

a sheet member rearward said capacitive touch panel, said sheet member comprising an ITO film, a form of mesh, or a mesh containing sheet,

wherein said ITO film, mesh, or mesh sheet is grounded thereby providing an EMI shielding effect.

6. The assembly of claim 5, wherein said front surface further comprises an anti-reflection treatment.

7. The assembly of claim 5, wherein said sheet member further comprises a linear polarizer PA, wherein said linear polarizer PA has a linear polarization axis PAX.

8. The assembly of claim 5, wherein said sheet member further comprises a retarder layer RA, wherein said retarder layer RA has a retardance of about (2n+1)λ

/4 and a first slow axis RAX, where n is an integer and λ

is 400 nm to 700 nm.

13. A display touch panel integral comprising:

the assembly of claim 5, and

a liquid crystal display, said liquid crystal display comprising, from front to the back, a linear polarizer PB, a liquid crystal cell sandwiched between two sheets of transparent electrodes, and a backlight module, said linear polarizer PB having a linear polarization axis PCB.

14. The display integral of claim 13, wherein said sheet member comprises an anti-reflection treatment.

15. The display integral of claim 13, wherein said sheet member comprises a linear polarizer PA, wherein said linear polarizer PA has a linear polarization axis PAX.

16. The display integral of claim 13, wherein said sheet member comprises a retarder layer RA, wherein said retarder layer RA has a retardance of about (2n+1)λ

/4 and a first slow axis RAX, where n is an integer and λ

is 400 nm to 700 nm.

22. The assembly of claim 5, wherein said sheet member comprises multiple layers.