Abstract: Films having a structured surface with an engineered feature, such as prism grooves, to be used in displays having a backlight. The films can be arranged in a stack having one or more of the following: birefringent brightness enhancement films, non-birefringent brightness enhancement films, polarizers, diffusers, birefringent turning films, and non-birefringent turning films. Those films can be arranged in any order from the backlight to a viewer.

Abstract: An article, such as a film, comprising a body portion and a surface portion is provided. The body portion has (i) a first and a second surface, and (ii) first and second in-plane axes that are orthogonal with respect to each other and a third axis that is mutually orthogonal to the first and second in-plane axis in a thickness direction of the body. The surface portion comprises a linear geometric feature disposed on the first surface of the body in a direction substantially parallel to the first in-plane axis of the polymeric body. The article has (i) a first index of refraction (n1) along the first in-plane axis, (ii) a second index of refraction (n2) along the second in-plane axis, and (iii) a third index of refraction (n3) along the third axis, wherein n2 and n3 are substantially the same but substantially different from n1; and wherein the uniaxially oriented polymeric film has a relative birefringence of 0.

Abstract: A process for uniaxially stretching films having a structured surface comprising a geometric feature is described. The process provides a film in which the cross sectional shape of the feature after stretching is substantially identical to the cross sectional shape of the feature prior to stretching.

Abstract: A process for uniaxially stretching films having a structured surface comprising a geometric feature is described. The process provides a film in which the cross sectional shape of the feature after stretching is substantially identical to the cross sectional shape of the feature prior to stretching. Structured surface articles are also described. The articles have substantially the same uniaxial orientation throughout the film, including the geometric structure.

Abstract: Uniaxially Oriented Articles Having Structured Surface A process for uniaxially stretching films is having a structured surface comprising a geometric feature is described. The process provides a film in which the cross sectional shape of the feature after stretching is substantially identical to the cross sectional shape of the feature prior to stretching. Structured surface articles are also described. The articles have substantially the same uniaxial orientation throughout the film, including the geometric structure. Uniaxially oriented articles having structured surfaces are described.

Abstract: A process for uniaxially orienting articles having a structured surface comprising a geometric feature is described. The process comprises a step of orienting the article in a direction substantially parallel to a first in-plane axis of the article.

Abstract: A roll of an article, such as a film, comprising a body portion and a surface portion is provided. The body portion has (i) a first and a second surface, and (ii) first and second in-plane axes that are orthogonal with respect to each other and a third axis that is mutually orthogonal to the first and second in-plane axis in a thickness direction of the body. The surface portion comprises a geometric feature. The roll preferably has a cushioning layer between the plies of the article in the roll.