CN-116009307-B - Display device, backlight module and light source module positioning structure thereof

Abstract

The invention relates to a display device, a backlight module and a light source module positioning structure thereof. The light source module positioning structure comprises a back plate, a light source module and a light source module, wherein the side wall of the back plate is provided with a guide part, the guide part extends downwards towards the accommodating space in a tilting way, the front end of the guide part is provided with a positioning convex part, the side edge of a flexible circuit board of the light source module is provided with a positioning notch, the positioning notch corresponds to the positioning convex part, and the positioning convex part is clamped in the positioning notch to perform positioning assembly. Therefore, the light source module can be positioned without rubberizing, thereby achieving the effect of shortening assembly or reworking.

Inventors

• ZHANG ZHENGDE
• LIN JIAYE
• LI YURU
• HOU PEIFEN

Assignees

• 瑞仪(广州)光电子器件有限公司

Dates

Publication Date

20260512

Application Date

20211022

Claims (11)

1. 1. The utility model provides a light source module location structure of backlight unit which characterized in that includes: A back plate comprising a bottom plate and at least one side wall extending from the periphery of the bottom plate, wherein the side wall is perpendicular to the bottom plate, a containing space is formed between the side wall and the bottom plate, the side wall is provided with at least one guiding part which extends downwards in a tilting way towards the containing space, the front end of the guiding part is provided with a positioning convex part, and The light source module comprises a flexible circuit board arranged on the bottom plate and a plurality of light sources arranged on the flexible circuit board in sequence, wherein at least one positioning notch is arranged on the positioning side edge of the flexible circuit board and corresponds to the positioning convex part, so that when the flexible circuit board slides downwards along the guiding part to enable the positioning convex part to be clamped in the positioning notch, the front end face of the guiding part is abutted against the flexible circuit board.
2. 2. The light source module positioning structure of claim 1, wherein the positioning protrusion is formed by extending a front end of the guiding portion in a straight direction.
3. 3. The light source module positioning structure of a backlight module according to claim 1, wherein the positioning protrusion is formed by extending a front end of the guiding portion downward perpendicular to the bottom plate.
4. 4. The light source module positioning structure of a backlight module according to claim 1, wherein the flexible printed circuit board is provided with a plurality of protrusions on a side edge which is close to the plurality of light sources and extends along a long axis direction, the plurality of protrusions are arranged along the long axis direction, the positioning notch of the flexible printed circuit board is arranged on the positioning side edge which extends along a short axis direction, the back plate comprises a fixing wall, the fixing wall is adjacent to the flexible printed circuit board and is provided with a plurality of openings along the long axis direction, and the protrusions are correspondingly accommodated in the openings.
5. 5. The light source module positioning structure of claim 4, wherein a plurality of concave portions are formed between the plurality of convex portions, and the depth of the plurality of concave portions is the thickness of the fixed wall.
6. 6. The light source module positioning structure of claim 4, wherein the protrusion corresponds to a position of each light source on the flexible circuit board.
7. 7. The light source module positioning structure of claim 4, wherein the fixing wall of the back plate extends to form a bearing part, and the bearing part is parallel to the bottom plate and is used for placing a liquid crystal panel.
8. 8. The light source module positioning structure according to any one of claims 1 to 7, wherein the guide portion has a vertical portion extending upward from the bottom plate and an inclined portion connected to the vertical portion, the inclined portion faces the accommodating space, an included angle is formed between the vertical portion and the inclined portion, and the included angle is an acute angle.
9. 9. The light source module positioning structure of a backlight module according to any one of claims 1 to 7, wherein the guiding portion has an outer side surface and an inner inclined surface, the inner inclined surface faces the accommodating space, an included angle is formed between the outer side surface and the inner inclined surface, and the included angle is an acute angle.
10. 10. A backlight module, comprising: A light guide plate having a light incident surface and a light emergent surface connected to the light incident surface, and The light source module positioning structure according to any one of claims 1 to 9, wherein the light guide plate is disposed on the bottom plate, the light incident surface is adjacent to the light source module, and light emitted by the plurality of light sources enters the light guide plate through the light incident surface.
11. 11. A display device, comprising: the backlight module according to claim 10, and And the liquid crystal panel is arranged on the light emitting surface of the light guide plate.

Description

Display device, backlight module and light source module positioning structure thereof Technical Field The present invention relates to a display technology, and more particularly, to a backlight module and a positioning structure of a light source module thereof in a display. Background With the development of display technology, liquid crystal display devices are widely used in the display field, and common liquid crystal display devices include liquid crystal televisions, liquid crystal computers, and vehicle-mounted displays. The liquid crystal display device generally includes a liquid crystal display panel and a backlight module, the backlight module is used for providing a light source for the liquid crystal display panel, and the liquid crystal display panel can modulate light emitted by the backlight module so as to realize image display. In the related art, the backlight module 10 includes a light guide plate 11, an optical film set 14, a reflective sheet 15, a light source module 12, and a frame 13. One surface of the light guide plate 11 is a light-emitting surface, the other surface is a mesh-point surface, the optical film group 14 is arranged on the light-emitting surface of the light guide plate 11, the reflecting sheet 15 is arranged on the mesh-point surface side of the light guide plate 11, and the frame 13 carries and coats the elements of the backlight module 10. The light source module 12 includes a flexible circuit board 12a and a plurality of light sources 12b disposed on the flexible circuit board 12a, and when the backlight module 110 is in use, light emitted from the light source module 12 is guided by the light guide plate 11, then emitted from the light emitting surface of the light guide plate 12, and finally emitted through the optical film set 14. The conventional light source module 12 is fixed by a double-sided tape 16 during assembly, specifically, the flexible circuit board 12a, the light guide plate 11 and the reflective sheet 15 are attached and fixed by a pressing jig, and the double-sided tape 16 is used to adhere the light source module to the frame 13, so that the plurality of light sources 12b are located between the light incident side of the light guide plate 11 and the side wall 13a of the frame 13. In summary, the positioning method of the light source module 12 of the existing backlight module 10 by rubberizing and fixing at least has the following problems, the design requires to attach the double-sided tape 16 first and then attach the additional pressing operation by the pressing jig during the assembly, so the assembly can complicate the operation, resulting in longer assembly time and difficult completion of the reworking maintenance afterwards. Moreover, when the light source module 12 is adhered to the frame 13 via the double-sided tape 16, and the plurality of light sources 12b are located between the light incident side of the light guide plate 11 and the side wall 13a of the frame 13, a small gap G will be formed between the light source 12b and the side wall 13a of the frame 13 due to the flexible circuit board 12a, and the gap G of the current light source module 12 is about 0.4mm, so that the frame of the display device cannot be narrowed further. Disclosure of Invention The invention aims to provide a light source module positioning structure of a backlight module, which does not need rubberizing, and achieves the effects of simplifying assembly or reworking procedures and shortening working hours by means of structure positioning and limiting. In order to achieve the above objective, the invention provides a light source module positioning structure of a backlight module, comprising a back plate, a light source module and a light source module, wherein the back plate comprises a bottom plate and at least one side wall extending from the periphery of the bottom plate, the side wall is perpendicular to the bottom plate, a containing space is formed between the side wall and the bottom plate, the side wall is provided with at least one guide part, the guide part extends downwards towards the containing space in a tilting way, the front end of the guide part is provided with a positioning convex part, the light source module comprises a flexible circuit board and a plurality of light sources sequentially arranged on the flexible circuit board, the positioning side edge of the flexible circuit board is provided with at least one positioning notch, the positioning notch corresponds to the positioning convex part, and the positioning convex part is clamped with the positioning notch. Preferably, the positioning protrusion extends from the front end of the guide portion in a straight direction, or the positioning protrusion extends from the front end of the guide portion in a downward direction perpendicular to the bottom plate. Preferably, the front end surface of the guide portion abuts against the flexible circuit board. Preferably, the flexible circ