Skc Haas Display Films Co., Ltd.

Eastman-kodak Company

Solid State Opto Limited

Rohm and Haas Electronics Materials LLC

Rohm and Haas Denmark Finance A/s

Junwon Lee

David D Kessler

Xiang-Dong Mi

Randall Wilson

Robert P Bourdelais

Peter T Aylward

Jeffery R Parker

Rongguang Liang

Marek W Kowarz

Timothy A McCollum

Charles M Rankin

Qi Hong

Cheryl J Brickey

Stephen C Meissner

Chris P Brophy

Steven J Hansen

Ronald J Sudol

A light-guiding article has a film substrate that has at least one patterned surface having a plurality of discrete surface features and an incident edge that is substantially orthogonal to the at least one patterned surface. Each surface feature in the plurality of discrete surface features extends along a length direction that is substantially parallel to the incident edge. Taken in cross-section along the length direction, each surface feature has a positively sloped portion, a substantially flat portion, and a negatively sloped portion. A first widthwise cross-section taken at a first position through the positively sloped portion has the same shape as a second widthwise cross-section taken at a second position through the negatively sloped portion.

Light guiding film having light extraction features

The invention generally relates to an optical turning film for providing light redirection, comprising:

Turning film using array of roof prism structures

This invention relates to a display apparatus comprising: a) a light source; b) a light guiding plate for transmitting light from the light source outward from a two-dimensional light-providing surface, one dimension of the light-providing surface defined in a width direction orthogonal to the path of incident light from the light source defined in a width direction orthogonal to the path of incident light from the light source and the other dimension of the light-providing surface defined in a length direction, orthogonal to the width direction; c) a linear divergence reduction surface for reducing the divergence of light from the light providing surface predominantly with respect to the width direction, to provide a linearly divergence-reduced illumination, whereby divergence along the width direction at full-width half-maximum is less than about 50% of divergence at full-width half-maximum along the length direction; d) a liquid crystal display component for modulating the linearly divergence-reduced light to form a modulated light according to image data, and, e) a diffusing surface in the path of the modulated light.

Backlight unit with linearly reduced divergence having the width of an output aperture vary over the length of a light divergence reduction structure

A backlight apparatus for directing light toward a display panel and the resulting display device comprises an elongated illuminator that is disposed to direct light towards the display panel and a light diffusing element for uniformizing the light redirected from the two or more elongated illuminators to provide backlight illumination. Such an apparatus provides a more even light distribution to the display.

LCD display backlight using elongated illuminators

Backlight containing formed birefringence reflective polarizer

A brightness enhancement article and illumination system provides light from a two-dimensional surface. The brightness enhancement article has a plurality of light collecting structures wherein each light collecting structure is longitudinally extended in a length direction along the surface. The structures may have various lengthwise shapes such as being curved, concentric, radial, or of varying thickness.

Brightness enhancement film using an array of light concentrators

Illumination apparatus and film

The invention relates to a light redirecting polymeric film comprising a plurality of polymeric individual optical elements wherein the elements comprise curved wedge shaped features in the plane of the film, having a length in the range of 800 to 4000 micrometers.

Long curved wedges in an optical film

A lighting apparatus for providing illumination, comprising: wherein y is a radial distance along the illumination plane from the optical axis of the beam-spreading optical element,dy is an arbitrarily small increment of the radial distance,d&#x3b8; is the angular increment of the beam angle corresponding to dy, and&#x192;(&#x3b8;) is the distribution function for the angular distribution of the light source, such that each beam spreading optical element adjusts the luminous intensity of the source illumination beam from the corresponding surface-emitting light source to provide a uniformized illumination beam directed toward the illumination plane;and,

Backlight using surface-emitting light sources

A brightness enhancement article () provides light from a two-dimensional surface. The brightness enhancement article () has a plurality of light collecting structures (), wherein each light collecting structure () is longitudinally extended in a length direction along the surface. Each light collecting structure () has an input aperture () optically coupled to a light-providing surface and an output aperture () distal from the input aperture (), wherein the output aperture () has a surface area that is larger than the surface area of the input aperture (). A pair of curved side walls () extend from the output aperture () toward the input aperture (). In a cross section taken orthogonally with respect to the length direction, the curved side walls () approximate a parabolic curvature.

Brightness enhancement film using a linear arrangement of light concentrators

A ring illuminator () has a light channeling section () with an input face () optically coupling the light channeling section () to a flash unit () of a camera () for obtaining flash illumination therefrom. A ring section () is optically coupled to the light channeling section and extends around an aperture for fitting the ring illuminator around a lens (). The ring section has a rear surface () for positioning toward the body of the camera. The rear surface has a plurality of light redirecting features () for redirecting at least a portion of the flash illumination from within the ring section outward from the camera, around the lens of the camera.

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Webster, NY, United States of America

Junwon Lee