Positioning device for positioning an optical film set, backlight module, and liquid crystal display

A backlight module comprising:

• a back plate comprising a base plate and a plurality of side plates, a space being formed between the base plate and the plurality of side plates;
• a light guiding plate and an optical film set on the light guiding plate, disposed within the space;
• and
• a positioning device for positioning the optical film set, comprising:
• an assembly sheet, disposed at one end of the positioning device, penetrating an opening formed on at least one edge of the optical film set;
• and
• a fixing device, for fixing the positioning device to a side plate of the back plate, the fixing device comprising:
• a flexible sheet and a fixing sheet disposed on the same side of the assembly sheet, the flexible sheet comprising a first plate and a second plate perpendicular to the first plate, the first plate being perpendicular to the assembly sheet and parallel to the fixing sheet;
• and
• a groove disposed on the side plate of the back plate;
• wherein the flexible sheet leans against an end of the side plate and an outer side of the side plate, and the fixing sheet fittingly penetrates the groove in a direction from an inner side to the outer side of the side plate, and the side plate is stuck into a space formed by the flexible sheet and the fixing sheet.

A liquid crystal display comprising a backlight module, the backlight module comprising:

• a back plate comprising a base plate and a plurality of side plates, a space being formed between the base plate and the plurality of side plates;
• a light guiding plate and an optical film set on the light guiding plate, disposed within the space;
• and
• a positioning device for positioning the optical film set, comprising:
• an assembly sheet, disposed at one end of the positioning device, penetrating an opening formed on at least one edge of the optical film set;
• and
• a fixing device, for fixing the positioning device to a side plate of the back plate, the fixing-device comprising:
• a flexible sheet and a fixing sheet disposed on the same side of the assembly sheet, the flexible sheet comprising a first plate and a second plate perpendicular to the first plate, the first plate being perpendicular to the assembly sheet and parallel to the fixing sheet;
• and
• a groove disposed on the side plate of the back plate;
• wherein the flexible sheet leans against an end of the side plate and an outer side of the side plate, and the fixing sheet fittingly penetrates the groove in a direction from an inner side to the outer side of the side plate, and the side plate is stuck into a space formed by the flexible sheet and the fixing sheet.