Method for stacking surface structured optical films
First Claim
Patent Images
1. A light management film package for managing light within a display, comprising:
- a first, brightness enhancing optical film having a first surface structured with prismatic ribs, the ribs having associated rib heights;
a second optical film having a second surface opposing the first surface of the first optical film; and
a first layer of adhesive on the second surface, at least some of the prismatic ribs of the first surface penetrating into the first layer of adhesive, the first layer of adhesive having a thickness less than the associated rib heights of the ribs penetrating into the first adhesive layer.
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Abstract
A display includes an optical film that has a surface structure, such as a prismatically structured surface for increasing the brightness of the display. The structured surface is bonded to an opposing surface of a second film using a layer of adhesive, by penetrating the structured surface into the adhesive layer to a depth less than a feature height of the structured surface. The bonded film structure provides additional strength to the films and reduces the possibility of film damage during display assembly.
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Citations
45 Claims
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1. A light management film package for managing light within a display, comprising:
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a first, brightness enhancing optical film having a first surface structured with prismatic ribs, the ribs having associated rib heights;
a second optical film having a second surface opposing the first surface of the first optical film; and
a first layer of adhesive on the second surface, at least some of the prismatic ribs of the first surface penetrating into the first layer of adhesive, the first layer of adhesive having a thickness less than the associated rib heights of the ribs penetrating into the first adhesive layer. - View Dependent Claims (2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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7. A film package as recited in claim wherein the first and second optical films are prismatic, light directing films, and the third optical film is a reflecting polarizer.
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17. A display system, comprising:
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an illumination unit;
a display unit; and
a light management unit disposed between the illumination unit and the display unit to manage light passing from the illumination unit source to the display unit, the light management unit comprising a first optical film having a first surface structured with prismatic ribs, the ribs having associated rib heights, a second optical film having a second surface opposing the first surface of the first optical film, and a first layer of adhesive on the second surface, at least some of the prismatic ribs of the first surface penetrating into the first layer of adhesive, the lirst layer of adhesive having a thickness less than the associated rib heights of the ribs penetrating into the first adhesive layer. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. A light management film package for managing light within a display, comprising:
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a first optical film having a first surface structured with refractive features, the refractive features including active refractive surfaces for light to pass therethrough; and
a second optical film disposed over the first optical film, the second optical film having a second surface; and
a first layer of adhesive on the second surface, at least some of the refractive features penetrating partially into the first layer of adhesive so as to leave a gap between the first adhesive layer and portions of the first surface, portions of the active surfaces of the penetrating features interfacing with the gap and other portions of the penetrating features interfacing with the first adhesive layer. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A display system, comprising:
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an illumination unit;
a display unit; and
a light management unit disposed between the illuminaltion unit and the display unit to manage light passing from the illumination unit source to the display unit, the light management unit cornprising a first optical film having a first surface structured with refractive features, the refractive features including active refractive surfaces for light to pass therethrough, a second optical film disposed over the first optical film, the second optical film having a second surface and a first layer of adhesive on the second surface, at least some of the refractive features penetrating partially into the first layer of adhesive so as to leave a gap between the first adhesive layer and portions of tho first surface, portions of the active surfaces of the penetrating features interlacing with the gap and other portions of the penetrating features intergacing with the first adhesive layer. - View Dependent Claims (40, 41, 42, 43, 44, 45)
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Specification