Backlight module
A backlight module includes a back cover, a light source panel positioned on the back cover, a frame connected with the back cover and an optical film assembled to the frame. A pair of reflective plates are positioned between the frame and the back cover, and a plurality of through holes are defined on the pair of reflective plates. A chamber is cooperatively defined between the pair of reflective plates and the back cover, and inner surfaces of the chamber have a high reflectivity.
1. A backlight module comprising:
a back cover;
a light source panel received in the back cover;
a frame connected to the back cover; and
an optical film coupled to the frame;
a pair of reflective plates positioned between the back cover and the frame; and
a fastening ledge connected to the pair of reflective plates; and
wherein a plurality of through holes are defined on the pair of reflective plates, and the pair of reflective plates and the back cover cooperatively define a chamber; and
wherein inner surfaces of the chamber have a high reflectivity.
2. The backlight module of claim 1 , wherein each of the pair of reflective plates comprises a curved surface adjacent to the light source panel, and a plane surface parallel to the back cover.
3. The backlight module of claim 1 , wherein a plurality of support ledges is positioned between the pair of reflective plates and the back cover, and the pair of reflective plates are supported by the support ledges.
4. The backlight module of claim 1 , wherein the frame comprises an upper frame, a lower frame, and a protrusion positioned between the upper frame and the lower frame, wherein the protrusion is located around the interior surface of the frame, and wherein the upper frame and the protrusion cooperatively define a receiving portion configured to receive the optical film.
5. The backlight module of claim 4 , wherein the optical film is assembled on the protrusion, the two reflective plates are positioned below the protrusion, and a light mixing space is defined between the optical film and the pair of reflective plates.
6. The backlight module of claim 4 , wherein the back cover comprises a bottom plate and a plurality of sidewalls perpendicular to the bottom plate, and the plurality of sidewalls are connected with the lower frame.
7. The backlight module of claim 6 , wherein the back cover includes a recess defined on the bottom plate, wherein the cross section of the recess is rectangular, and the light source panel is received in the recess.
8. The backlight module of claim 7 , wherein the light source panel has at least one light source, wherein the at least one light source is a light emitting diode.
9. The backlight module of claim 1 , wherein the optical film comprises a first diffusion sheet, a first prism lens, a second prism lens, and a second diffusion sheet arranged and stacked in order, wherein a top of the stack begins with the first diffusion sheet and a bottom of the stack ends with the second diffusion sheet.