Lens sheet for use in backlight, backlight and display device using the same
AssigneeHitachi Maxell, Ltd.
InventorYukinori Yamada
Life of this patent
Estimating the term…
Abstract
A lens sheet according to the invention includes a base film, a lenticular lens resin layer, a prism resin layer, and a filling resin layer. The lenticular lens resin layer includes a plurality of cylindrical lenses formed on one surface of the base film and arranged. The prism resin layer includes a plurality of prisms formed on the other surface of the base film and arranged, and has a lower refractive index than the refractive index of the base film. The filling resin layer is filled on a surface of the prism resin layer provided with the arranged prisms and has a higher refractive index than the refractive index of the prism resin layer. Therefore, the lens sheet according to the invention can restrain side lobe light emitted obliquely to the front surface.
Claims9
A lens sheet for use in a backlight, comprising:
- a base film;
- a lenticular lens resin layer formed on one surface of said base film and including a plurality of cylindrical lenses arranged;
- a prism resin layer formed on the other surface of said base film, including a plurality of prisms arranged and having a lower refractive index than the refractive index of said base film;
- and
- a filling resin layer filled on a surface of said prism resin layer provided with said arranged prisms and having a higher refractive index than the refractive index of said prism resin layer.
A backlight comprising a lens sheet, said lens sheet comprising:
- a base film;
- a lenticular lens resin layer formed on one surface of said base film and including a plurality of cylindrical lenses arranged;
- a prism resin layer formed on the other surface of said base film, including a plurality of prisms arranged, and having a lower refractive index than the refractive index of said base film;
- and
- a filling resin layer filled on a surface of said prism resin layer provided with said arranged prisms and having a higher refractive index than the refractive index of said prism resin layer.
A display device comprising a backlight including a lens sheet, said lens sheet comprising:
- a base film;
- a lenticular lens resin layer formed on one surface of said base film and having a plurality of cylindrical lenses arranged;
- a prism resin layer formed on the other surface of said base film, having a plurality of prisms arranged and having a lower refractive index than the refractive index of said base film;
- and
- a filling resin layer filled on a surface of said prism resin layer provided with said arranged prisms and having a higher refractive index than the refractive index of said prism resin layer.
A display comprising:
- a backlight including a lens sheet, said lens sheet comprising a base film, a lenticular lens resin layer formed on one surface of said base film and having a plurality of cylindrical lenses arranged, a prism resin layer formed on the other surface of said base film, having a plurality of prisms arranged and having a lower refractive index than the refractive index of said base film, and a filling resin layer filled on a surface of said prism resin layer provided with said arranged prisms and having a higher refractive index than the refractive index of said prism resin layer;
- and
- a liquid crystal panel provided on said backlight.
Dependencies are inferred from the claim text.