JP-2022534481-A5 -

Dates

Publication Date

20230529

Application Date

20200520

Description

Descriptions of elements in the figures should be understood to apply equally to corresponding elements in other figures unless otherwise indicated. While specific embodiments are illustrated and described herein, it will be understood by those skilled in the art that these specific embodiments can be replaced by various alternative and/or equivalent embodiments without departing the scope of this disclosure. This application is intended to encompass any adaptation or modification of any specific embodiment discussed herein. Therefore, this disclosure is intended to be limited only by the claims and their equivalents. Illustrative embodiments are listed below. [Item 1] Linear absorbing polarizer and, The system comprises a reflective polarizer arranged on the linear absorbing polarizer and coupled to the linear absorbing polarizer, For substantially perpendicularly incident light, and for at least a first wavelength in the visible wavelength range of approximately 420 nm to approximately 650 nm, The reflective polarizer has a light reflectance of at least 60% for a first polarization state and a light transmittance of at least 60% for a second polarization state that is orthogonal to it. The linear absorbing polarizer has a light absorption rate of at least 60% for the first polarization state and a light transmittance of at least 60% for the second polarization state. When heated at 105 degrees Celsius for 15 minutes, the difference in shrinkage rates between the reflective polarizer and the linear absorbing polarizer along the first polarization state and the second polarization state is greater than approximately zero and greater than approximately 0.2%, respectively. The optical laminate comprising a plurality of alternating first polymer layers and second polymer layers, wherein, with respect to at least the first wavelength, the first polymer layer has a smaller average in-plane refractive index than the second polymer layer, and the first polymer layer has a glass transition temperature of at least 107 degrees Celsius. [Item 2] The optical laminate according to item 1, wherein the first polymer layer has a glass transition temperature of at least 109 degrees Celsius. [Item 3] The optical laminate according to item 1, wherein the first polymer layer has a glass transition temperature of at least 115 degrees Celsius. [Item 4] The optical laminate according to any one of items 1 to 3, wherein each layer within the first polymer layer and the second polymer layer has a thickness of less than approximately 500 nm. [Item 5] The optical laminate according to item 4, wherein the plurality of alternating first polymer layers and second polymer layers of the reflective polarizer are arranged between two outermost layers on opposite sides of the reflective polarizer, and each outermost layer has a thickness of about 0.5 microns to about 5 microns. [Item 6] The optical laminate according to any one of items 1 to 5, wherein at least the second polymer layer is substantially uniaxially oriented. [Item 7] An optical laminate according to any one of items 1 to 6, wherein, with respect to substantially perpendicularly incident light and with respect to at least the first wavelength, the plurality of alternating first polymer layers and second polymer layers have a light reflectance of more than about 80% for the first polarization state, a light transmittance of more than about 85% for the second polarization state, and a light transmittance of less than about 0.1% for the first polarization state. [Item 8] The optical laminate according to any one of items 1 to 7, wherein the reflective polarizer and the linear absorbing polarizer are integrally bonded together with an adhesive, and the adhesive has a storage modulus G' at 105 degrees Celsius of less than about 10 kPa, and a loss modulus G'' at 105 degrees Celsius, wherein the ratio of the loss modulus G'' to the storage modulus G' is at least about 0.5. [Item 9] An integrally formed optical film comprising a plurality of alternating first and second polymer layers, totaling at least 50, arranged between two outermost polymer layers on opposite sides of each other, wherein each of the first and second polymer layers has a thickness of less than approximately 400 nm, each outermost polymer layer has a thickness of more than approximately 500 nm, the first polymer layer has a glass transition temperature of at least 107 degrees Celsius and an average in-plane refractive index smaller than that of the second polymer layer, the minimum average peel strength between two portions of the integrally formed optical film is greater than approximately 0.4 N/cm, and each of the two portions includes one of the outermost polymer layers. [Item 10] The optical film according to item 9, wherein the minimum average peel strength is greater than approximately 0.6 N/cm or greater than approximately 0.8 N/cm. [Item 11] The optical film according to item 9 or 10, wherein each outermost