BRIEF DESCRIPTION OF THE DRAWINGS
FIGS. 1A and 1B are schematic illustrations showing a light control film according to an embodiment of the present invention, in which FIG. 1A is an illustration showing an example where no protective layer is provided on the light incident surface, and FIG. 1B is an illustration showing an example where a protective layer is provided on the light incident surface;
FIGS. 2A and 2B are illustrations showing reflecting/transmitting effects with respect to incident light of the light control film shown in FIGS. 1A and 1B, in which FIG. 2A is an illustration showing the state of transmission (emission), and FIG. 2B is an illustration showing the state of transmission and reflection;
FIGS. 3A and 3B are illustrations showing functions of respective layers of the light control film shown in FIGS. 1A and 1B, in which FIG. 3A is an illustration showing absorption of incident light (lost light) in the light absorbing layer, and FIG. 3B is an illustration showing a state where light is reflected off the boundary between the high refractive index area and the low refractive index area so as to be emitted (transmission output);
FIGS. 4A and 4B are illustrations showing examples of a lighting device according to the present invention, in which FIG. 4A is a schematic configuration diagram according to a combination of a light control film and a light source, and FIG. 4B is an illustration showing an example of a switching use when combining a transparent layer having different refractive index with the one of FIG. 4A;
FIGS. 5A and 5B are configuration diagrams showing a light source provided to the lighting device of FIG. 4, in which FIG. 5A is a schematic diagram showing a light source in which a reflecting sheet and a diffusion plate are combined with a cold cathode tube, and FIG. 5B is a configuration diagram showing a light source in which an LED is combined with a light guide plate and an optical film;
FIG. 6 is an illustration showing a configuration example of a display device according to the present invention;
FIGS. 7A and 7B show comparative experimental examples for comparing examples and conventional examples of the light control film according to the present invention; in which FIG. 7A is an illustration showing a light control film of a conventional example which is an experiment subject, and FIG. 7B is a characteristic curve (emission angle distribution) diagram of the light control film of FIG. 7A;
FIG. 8 is an illustration showing the film body part of the light control film according to the present invention which is set to perform measurement under the same conditions as those of the conventional example of FIG. 7A;
FIGS. 9A and 9B show characteristic curves (emission angle distribution) of the light control film according to examples, in which FIG. 9A is a diagram showing the emission angle distribution according to the comparative example 1, and FIG. 9B is a diagram showing the emission angle distribution according to the example 1;
FIG. 10 is a configuration diagram showing a liquid crystal display element capable of switching view angle according to the example 2; and
FIG. 11 is an illustration showing an effect of the light control film according to the conventional example.
Patent Application
20070218261
