Backlight module and display device

A display device, comprising:

• a backlight module comprising:
• a back plate;
• a light guide plate disposed in the back plate;
• a first optical film disposed above the light guide plate, wherein the first optical film has an elongated slot;
• a first adhesive member, wherein one portion of the first adhesive member is disposed in the elongated slot;
• a second optical film disposed above or under the first optical film, and a portion of the second optical film overlaps the elongated slot of the first optical film so as to be adhered on the portion of the first adhesive member which is located in the elongated slot;
• and
• a light source disposed on the back plate adjacent to a light-incident surface of the light guide plate;
• and
• a display panel disposed in front of the light guide plate, the first optical film and the second optical film, wherein the display panel is held on the back plate.

A backlight module, comprising:

• a first optical film having an elongated slot;
• an adhesive member, wherein one portion of the adhesive member is disposed in the elongated slot;
• a second optical film disposed above or under the first optical film, wherein a portion of the second optical film overlaps the elongated slot of the first optical film so as to be adhered on the portion of the adhesive member which is located in the elongated slot;
• and
• a light source, wherein light emitted from the light source forms a plane light source after passing through the first optical film and the second optical film.