In an alternate embodiment, the configuration of the condensing element can be modified to selectively adjust the desired degree of collimation of the exiting light. The first side can include a series of optical elements and the second side includes a series of stepped plateaus and a series of base planes that run along a first axis. Figure 8 shows a theoretical plot of output from a uniform light distribution X-profile for one and two films of 0. Light adjusting sheet for a planar lighting device and a planar lighting device and a liquid crystal display using the sheet. PR, the results with two ninety-five degree linear prism films each having a moth-eye stracture on the previously smooth side show about the same brightness on axis as two ninety degree BEF films, a large improvement in brightness off axis in both vertical and horizontal axis and a warmer color to the light emerging from the display, hi Figures 26, 27, 28 and 29, the total integrated light intensity for the ninety-five degree prisms with moth-eye stracture films is 6, In the methods described herein, a substrate having a photosensitive coating on a surface thereof is provided. The display device of claim 20 wherein said linear prisms include triangular prisms having a top angle of about ninety degrees.
Another embodiment of the present invention is shown in Figure 4. At least one of the two integrated reflective structures further comprises a Fresnel microstructure. Abrasion reduction layer 34 can have a grooved structure on one or two surfaces to improve performance by reducing wetting. In the case of the polylithic film, a diffuser can be incorporated into the film structure saving the need to fabricate a separate diffuser and dependent on the degree of collimation required. The second section tapers from the first section towards an optical axis extending through the first and second sections. Experimental results confirmed these calculations. The resulting film will then function as a light control film similar to the prior skived louvered plastic films. The reflector is spaced slightly away from surface to allow total internal reflection at surface to take place.
In some embodiments, the first and second transparent polymer layers are transparent, radiation-cured polymer layers. Adjacent to the first side feflexite waveguide is waveguide reflector formed of a specular material.
Preferably those grooves are narrow with relatively steep sides and flat bottoms. In another embodiment, the width of plateaus 28 can be between about 10 and about 50 microns. The spacing of the protuberances should be sufficiently fine to avoid losses by diffraction. First side can be stepped in shape. The intensity of Section two of the grooved structure is shown in locations 1 – 57 and The refracted and retroreflected light is spread by one to two degrees depending on the accuracy of the linear corner cube array dihedral angles.
BACKGROUND OF THE INVENTION
collikating The present invention includes a light collimating film having a sheeting having a first side and a second side, wherein the first side includes a series of linear optical elements having a primary axis running the length of the optical elements, and the second side includes a plurality of subwavelength structures being oriented at about ninety degrees relative to the primary axis of the linear optical elements.
Antireflective surfaces, methods of manufacture thereof and articles comprising the same.
The optical structure film of claim 8 wherein said triangular prisms include a top angle of about eighty-eight degrees. A method for fonning a light collimating film, comprising: Solar lighting apparatus and controller for controlling the solar lighting apparatus. Above diffuser 20, first collimating film 22 has moth-eye structure 24 on a first side adjacent waveguide Above waveguidefirst collimating film has first prism structure with peaks pointed toward waveguide and first grooved structures on the window side of first prism structure Subwavelength visible light moth-eye stractures can be used on these overleaf films to effectively eliminate Fresnel reflection light losses.
Optical structures and sheeting that include polyurea and method for forming same are proposed in accordance with aspects of the present invention.
The second section tapers from the first section towards an optical axis extending through the first and second sections.
Second side can have grooved structures In this embodiment, the stracture has a nearly rectangular profile, which means they have no gradient layers, but more of a one layer anti-reflective coating with a lowered refractive index in the stracture region.
Optical structures including polyurea. On one side of waveguide 16 is waveguide reflector 18 formed of a specular material, such as aluminum or a coated white surface, for reflecting light back to waveguide At the same time S should remain great enough to permit an adequate amount of light to pass through the film. Figure 12 shows a theoretical plot of output from a uniform light distribution X-profile for one and two films of 0. The optical structures can include microstructures formed from polyurea.
Surface 12 has grooves such as groove 16 while surface 14 is planar. Above first collimating filmsecond collimating film has second moth-eye structure and second prism structure The shape of the reflector changes with the pressure surface of the rollers. The diffuser can be made by employing textured films and casting the linear prisms onto the smooth side of the film, by rotary screen printing a diffuse layer onto the polyester tie coat prior to casting the linear prisms onto the diffuse layer in this embodiment the diffuse layer is sandwiched between the linear prisms and the substrate filmby rotary screen printing a diffuse layer onto a canier film and then casting linear prisms onto the diffuse layer.
Grooved optical microstructure light collimating films – Reflexite Corporation
The liquid crystal display device using the optical film and the optical film. The height h of the linear prisms is measured by the vertical distance from the valley 52 to peak The method of claim 25 further comprising the step of arranging the first sheeting and second sheeting such that the plateaus of the first sheeting face the plateaus of the second sheeting. The light control film of claim 1 wherein the interiors of said grooves are rendered light absorbing by filling said interiors with a light-absorbing material.
Figure 28 is a plot of luminance cross section versus observation angle from the normal at zero degree orientation of a film without moth-eye structures and linear prisms with ninety-five degree included angle and a pitch of 0.
Figure 9 shows a theoretical plot of output from a uniform light distribution Y-profile for one and two films of 0. For example, two diffuse coloimating and two collimating films are used collimatint a stack on a light guide behind liquid crystal displays. The valley at the bottom of the grooves were also flat and were 1. Because the resulting laminates cannot be larger than the platens of the press in which they are laminated, the press must be sufficiently large to produce the largest required size, thus increasing the expense of the press.
USA – Light-collimating film – Google Patents
The light collimating film collimaging Claim 4 wherein said triangular prisms include a top angle in a range of between about ninety-five and degrees. An example of a linear prism film is shown in a perspective view in Figure 2 and in a side view in Figure 3.
Waveguide reflector 18 can be curved or flat. For example, as shown in FIG. Adjacent to the first side of waveguide is waveguide reflector formed of a specular reflecting material. From a high incident angle, the surfaces can appear blue or violet.
The dimensions of the width of the plateaus can each be less than about 3. The light collimating film of Claim 1 wherein said linear optical elements are pitched reflxite the range of between about 0. Plane light source unit. Then the light enters the grooved surface on the first surface of the second layer film where it is further collimated by refraction. However, a need still exists for improved control of lighting and enhancement of brightness for laptop computer screens.