TWI456311B - Backlight module and assembling method thereof - Google Patents

Claims (13)

A backlight module includes: a light guide plate, comprising: a light emitting surface; a reflecting surface opposite to the light emitting surface; and a light incident surface connecting the light emitting surface and the reflecting surface; a light source comprising a plurality of linear arrays The light-emitting diode element has a space between the two adjacent light-emitting diode elements, and each of the light-emitting diode elements has a light-emitting surface facing the light-incident surface, and each of the light-emitting surfaces The height of the diode element is greater than a thickness of the light guide plate; and an opaque layer is disposed on a side of the light-emitting surface of the light guide plate adjacent to one of the light-emitting diode elements, and includes: a strip portion, comprising: a first surface facing the light-emitting surface of the light guide plate; and at least two second surfaces adjacent to the first surface, spaced apart from one side of the first surface, respectively facing and abutting one of the light-emitting surfaces The light exiting surface for blocking light from being exposed to the light guide plate; and at least one extending portion adjacent to the first surface between the at least two second surfaces, extending from the side of the strip portion Some of these intervals. The backlight module of claim 1 further comprising: a cover having an accommodating space for accommodating the light guide plate, the light source and the opaque layer, wherein the opaque layer is An adhesive layer is bonded to the inside of the cover; a reflective sheet that abuts against the reflective surface of the light guide plate. The backlight module of claim 1, wherein the thickness of the opaque layer is not greater than a difference between the height of each of the light emitting diode elements and the thickness of the light guide plate. The backlight module of claim 1, wherein the opaque layer comprises a plurality of the at least one extension portion, and one of the longitudinal axes of the strip portion is perpendicular to the longitudinal axis of one of the extension portions And the extensions are respectively disposed at the intervals between the two adjacent two of the light emitting diode elements. The backlight module of claim 1, wherein the opaque layer comprises a plurality of the at least one extension portion, and one of the longitudinal axes of the strip portion is perpendicular to the longitudinal axis of one of the extension portions And the extensions are disposed in the intervals between the two adjacent two of the light emitting diode elements. The backlight module of claim 1, wherein the shape of the opaque layer comprises a comb shape, a "├" shape, a "" font, an "E" shape or an "F" shape. The backlight module of claim 1, wherein one end of the at least one extension further comprises a fastening portion, and a maximum width of one of the fastening portions is greater than a width of the interval, and is fixed to the light emitting diodes The body member is located away from one side of the strip. The backlight module of claim 1, wherein the at least one extension The cross-sectional width is greater than the width of the spacing such that the at least one extension is snapped into the space. The backlight module of claim 1, wherein the opaque layer comprises a light reflecting sheet or a light shielding sheet. A method for assembling a backlight module, comprising: providing a cover body having an accommodating space disposed axially toward a long axis; and arranging a light source into the accommodating space, wherein the light source comprises a plurality of the long axis toward the long axis An axially disposed light emitting diode element, each of the light emitting diode elements having an outwardly facing light emitting surface, and any two adjacent light emitting diode elements having a space therebetween; toward the long axis Arranging an opaque layer to the light emitting diode elements in an orthogonal direction, wherein the opaque layer comprises a strip portion and at least one extending portion, wherein the at least one extending portion is located in the strip portion One side, and extending into one of the intervals, such that the strip portion abuts each of the light emitting surfaces; and a direction to the orthogonal direction of the long axis, a light guide plate is disposed to the receiving space The light guide plate includes a light emitting surface, a reflecting surface and a light incident surface, wherein the light emitting surface is opposite to the reflecting surface and abuts the strip portion, and the light incident surface simultaneously connects the light emitting surface and the reflecting surface. And abutting each of the light emitting surfaces, the light guide plate is opposite to the light emitting surface Attaching a surface emitting sheeting. The method for assembling a backlight module according to claim 10, wherein When the opaque layer is disposed on the light emitting diode elements, the opaque layer is bonded to the inner side of the cover body by an adhesive layer. The method of assembling the backlight module according to claim 10, wherein when the opaque layer is disposed to the light emitting diode elements, the method further comprises: when the at least one extending portion extends into the interval, the at least one One of the ends of the extension portion is fastened to the side of the light-emitting diode element away from the strip portion. The method of assembling the backlight module of claim 10, wherein when the opaque layer is disposed to the light emitting diode elements, the method further comprises: when the at least one extending portion extends into the interval, due to the at least one The cross-sectional width of the extension is greater than the width of the spacing such that the at least one extension is snapped into the space.