Polarizing multilayer film, method of using same, and method for producing a device comprising the film

• US 9,753,202 B2
• Filed: 10/21/2014
• Issued: 09/05/2017
• Est. Priority Date: 10/23/2013
• Status: Active Grant

• Current Assignee: e.solutions GmbH
• Original Assignee: e.solutions GmbH
• Inventors: Franke, Thomas, Rasmussen, Jens
• Primary Examiner(s): Alexander, William R
• Application Number:
  US14/519,946
• Publication Number:
  US 20150109668A1
• Time in Patent Office: 1,050 Days
• Field of Search: 35948907, 35948301, 35948901
• CPC Class Codes: B32B 2309/105 Thickness
• CPC Class Codes: B32B 2457/202 LCD, i.e. liquid crystal displays
• CPC Class Codes: B32B 2457/208 Touch screens
• CPC Class Codes: B32B 2551/00 Optical elements
• CPC Class Codes: B32B 37/12 characterised by using adhesives
• CPC Class Codes: B32B 37/18 involving the assembly of discrete sheets or panels only
• CPC Class Codes: B32B 38/10 Removing layers, or parts of layers, mechanically or chemically
• CPC Class Codes: G02B 5/30 Polarising elements light-modulating devices with active elements G02F1/00
• CPC Class Codes: G02B 5/3033 in the form of a thin sheet or foil, e.g. Polaroid
• CPC Class Codes: G02B 5/3083 Birefringent or phase retarding elements G02B5/3008, G02B5/3016 take precedence; systems for polarisation control G02B27/286; manufacturing phase modulating patterns by lithographic processes G03F7/001

Abstract

A polarizing multilayer film is provided. The polarizing multilayer film comprises a first adhesive layer, a second adhesive layer, a polarization layer which is arranged between the first and second adhesive layers, a first separating film which is removably arranged on a side of the first adhesive layer remote from the polarization layer, and a second separating film which is removably arranged on a side of the second adhesive layer remote from the polarization layer. There are further provided a method of using the polarizing multilayer film and a method for producing a screen, a light-emitting decorative element or another device using the polarizing multilayer film.

Claims

1. Polarizing multilayer film comprising:

a first adhesive layer;

a second adhesive layer;

a polarization layer which is arranged between the first and second adhesive layers;

a first separating film which is removably arranged on a side of the first adhesive layer remote from the polarization layer; and

a second separating film which is removably arranged on a side of the second adhesive layer remote from the polarization layer,

wherein the first and the second separating films project beyond an edge of the other layers of the multilayer film to form projecting edge regions of the first and the second separating films, and

wherein the first and the second separating films are bonded together in the projecting edge regions to provide a packaging of the multilayer film.

2. Polarizing multilayer film according to claim 1, wherein at least one of the first and second adhesive layer comprises optically clear adhesive.

3. Polarizing multilayer film according to claim 1, wherein at least one of the first and second adhesive layer comprises a pressure sensitive adhesive, PSA.

4. Polarizing multilayer film according to claim 1, wherein the first adhesive layer has a thickness of between 5 and 50 micrometers.

5. Polarizing multilayer film according to claim 1, wherein the second adhesive layer has a thickness of between 50 and 400 micrometers.

6. Polarizing multilayer film according to claim 1,

wherein the polarization layer comprises a circular polarizer comprising a linear polarizer and a first retarder layer in the form of a quarter-wave layer for an optical wavelength in the visible range, and

wherein the polarizing multilayer film further comprises a second retarder layer in the form of a half-wave layer for an optical wavelength in the visible range, wherein the second retarder layer is arranged between the first and second adhesive layers,

wherein the half-wave layer is arranged between the linear polarizer and the quarter-wave layer.

7. Polarizing multilayer film according to claim 6, wherein the linear polarizer and all the retarder layers are each adhesively bonded to one another.

8. Polarizing multilayer film according to claim 1, wherein no impairment of one or more properties of the polarizing multilayer film is measurable after at least five hundred hours'"'"' continuous exposure of the polarizing multilayer film without the separating films to an ambient temperature of 60°

C. at a relative humidity of between 92 and 95% and/or after at least five hundred hours'"'"' continuous exposure to an ambient temperature of 95°

C.

9. Polarizing multilayer film according to claim 1, wherein the separating films allow the polarizing multilayer film to be handled separately.