Backlight module and display device
AssigneeRadiant Opto-Electronics Corporation
InventorsChia-Yin CHANG, Po-Chang HUANG, Kun-Cheng LIN
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Abstract
A backlight module comprises a light guide plate, a light source, a first optical film, and two second optical films. The first optical film is positioned toward the light emitting surface of the light guide plate and includes a body with multiple parallel prisms extending towards the light emitting surface and multiple optical structures positioned on the body and facing away from the light guide plate. Each of the second optical films has multiple parallel strips facing away from the first optical film. The direction of the strips on one of the second optical films being different from that on the other second optical film. This invention also provides a display device with the backlight module.
Claims20
A backlight module, comprising:
- a light guide plate, including a light incident surface and a light emitting surface connected to the light incident surface;
- a light source, provided corresponding to the light incident surface of the light guide plate;
- a first optical film, provided corresponding to the light emitting surface of the light guide plate, the first optical film includes a body, a plurality of prisms arranged on the body and facing the light emitting surface, and a plurality of optical structures arranged on the body and facing away from the light emitting surface of the light guide plate, wherein, the prisms are located between the light emitting surface and the optical structures;
- and
- two second optical films, stacked on the first optical film, each of the second optical films has a plurality of parallel strips facing away from the first optical film, and the direction E1 of the strips on one of the second optical films is different from the direction E2 of the strips on the other second optical film;
- wherein the backlight module further includes a reflective reflector located under the light guide plate, and the ratio of the prism angle of the prisms of the first optical film to the roughness of the reflective reflector is between 700 and 900, including the endpoint values.
Dependencies are inferred from the claim text.