| CPC G02F 1/133614 (2021.01) [G02F 1/133606 (2013.01)] | 17 Claims |
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1. A backlight module, comprising:
a light-emitting element, adapted to emit a blue light;
a quantum dot film, disposed on a transmitting path of the blue light and adapted to convert a first portion and a second portion of the blue light into a red light and a green light respectively;
at least one optical film, disposed on the quantum dot film, wherein the at least one optical film comprises:
a first prism sheet, has a plurality of first prism columns, an angle range of a vertex angle of each of the plurality of first prism columns is from 80° to 110°, the vertex angle of each of the plurality of first prism columns is away from the first prism sheet; and
a second prism sheet, has a plurality of second prism columns, an angle range of a vertex angle of each of the plurality of second prism columns is from 80° to 110°, the vertex angle of each of the plurality of second prism columns is away from the second prism sheet; and
a light adjusting element, disposed between the at least one optical film and the quantum dot film, wherein the light adjusting element has a first surface and a second surface facing the quantum dot film and the at least one optical film, respectively, the first surface has a plurality of first optical microstructures, the plurality of first optical microstructures comprise a plurality of cones protruding toward the quantum dot film, the light adjusting element is disposed between the first prism sheet and the quantum dot film, the first prism sheet is disposed between the second prism sheet and the light adjusting element, each of the plurality of cones has a bottom surface, a plurality of side surfaces, and a vertex, the bottom surface and the vertex are disposed opposite to each other, the plurality of side surfaces are disposed between the bottom surface and the vertex, both sides of each of the plurality of side surfaces connected to the vertex form an angle, and a range of the angle is from 60° to 100°;
wherein the second surface of the light adjusting element has a plurality of second optical microstructures, the plurality of second optical microstructures comprise a plurality of columns, each of the plurality of columns is a lenticular or a prism, each of the plurality of columns extends in a first direction, the plurality of first prism columns of the first prism sheet extend in a third direction, and the first direction is intersected with the third direction.
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