CN101699142A - Stiffened light source module and backlight module - Google Patents

Abstract

The invention discloses a light source module, which comprises a light source strip and a strip-shaped stiffening plate. The light source strip comprises a strip-shaped flexible circuit board and a plurality of light sources. The plurality of light sources are arranged on the strip-shaped flexible circuit board and distributed along the extending direction of the strip-shaped flexible circuit board. The strip stiffening plate is overlapped and connected on one surface of the strip flexible circuit board, which is provided with the light source, and extends along the extension direction of the strip flexible circuit board, and the strip stiffening plate is distributed to wind around at least one side edge of each light source and expose a plurality of light sources. The rigidity of the strip stiffening plate is greater than that of the strip flexible circuit board. The light source module in the embodiment of the invention has better rigidity and better yield.

Description

Stiffened light source module and backlight module

technical field

The invention relates to a light source module, in particular to a light source module used for a liquid crystal display backlight module.

Background technique

Liquid Crystal Display (LCD) is widely used in various electronic products such as computers, televisions, and mobile phones. The backlight module is one of the important components of the liquid crystal display. The light source device used in the backlight module directly affects the efficiency and assembly cost of the backlight module. Among them, light emitting diodes (Light Emitting Diodes, LED) have become one of the light sources used in liquid crystal displays due to their small size and low energy consumption. In addition, compared with the direct-type backlight module, the edge-type backlight module has attracted attention because it can have a thinner thickness.

A common edge-lit backlight module structure includes a light source device, a light guide plate, and a supporting base. Wherein, the light source device is composed of a light emitting diode light source arranged on a strip-shaped flexible circuit board. The support seat has a top plate and a bottom plate extending in the same direction from the upper and lower ends of the side wall of the support seat respectively, so as to enclose a semi-open accommodating space. The light guide plate is interposed between the top plate and the bottom plate. The light incident end of the light guide plate and the light source device are accommodated in the accommodation space and correspond to the light source device. Since the distance between the top plate and the bottom plate is generally smaller than the height of the light source device, the light source device needs to be extended into the accommodating space from the side of the supporting base when installing the light source device. Moreover, since the light source device uses a strip-shaped flexible circuit board, the rigidity is weak, so that the light source device is not easy to extend into the accommodating space and be fixed on the side wall of the supporting base. There is room for improvement in the design of the above-mentioned light source device.

Contents of the invention

The main purpose of the present invention is to provide a light source module with better rigidity.

Another object of the present invention is to provide a backlight module that can be assembled more conveniently and has better yield.

The light source module of the present invention includes a light source bar and a bar-shaped stiffening plate. The light source bar includes a strip-shaped flexible circuit board and multiple light sources. Multiple light sources are arranged on the strip-shaped flexible circuit board and distributed along the extending direction of the strip-shaped flexible circuit board. The strip-shaped stiffening plate is overlappingly connected to the side of the strip-shaped flexible circuit board provided with the light source, and extends along the extension direction of the strip-shaped flexible circuit board. The strip-shaped stiffening plate is distributed around at least one side of each light source and Expose to multiple light sources. Wherein, the rigidity of the strip-shaped stiffening plate is greater than that of the strip-shaped flexible circuit board.

The light source includes a top-light LED, and the top-light LED includes a light-emitting surface, which is arranged on the surface of the light source parallel to the strip-shaped flexible circuit board. The strip stiffener includes an elongated body and a plurality of protruding teeth. The extension body extends along the extension direction of the strip-shaped flexible circuit board, and is arranged on the same side of the plurality of light sources. A plurality of protruding teeth respectively extend from the extension body along the short side of the strip-shaped flexible circuit board, wherein each protruding tooth protrudes between adjacent light sources.

In different implementations, the strip-shaped stiffening plate is formed in a zigzag distribution of continuous inflection, and encloses a plurality of surrounding areas with openings, and a plurality of light sources are respectively accommodated in the plurality of surrounding areas. Wherein, adjacent enclosing regions have opposite opening directions. A plurality of penetration holes are formed on the strip-shaped stiffening plate, and a plurality of light sources respectively pass through the plurality of penetration holes. The strip-shaped stiffening plate is a square frame to enclose the penetration hole, the frame surrounds multiple light sources and the multiple light sources pass through the penetration hole.

The strip-shaped stiffening plate is bonded to the strip-shaped flexible circuit board through an adhesive layer. At least one side of the light source corresponds to the strip-shaped stiffening plate, and a slot is formed at the bottom of the side, and the strip-shaped stiffening plate extends into the slot. The top of the side is inclined inwardly to form a guiding slope.

The strip stiffener can be formed on the side of the frame of the backlight module. The backlight module further includes a light guide plate and a supporting seat. The light guide plate is arranged in the frame, the light guide plate has a light incident end extending along the strip-shaped flexible circuit board, and the light source emits light toward the light incident end. The supporting seat includes the side wall of the supporting seat, a top plate and a bottom plate. The top plate and the bottom plate respectively extend in the same direction from the upper and lower ends of the side wall of the supporting seat to enclose a semi-open accommodation space. Wherein, the light source strip and the strip-shaped stiffening plate are accommodated in the accommodation space, and the light guide plate is sandwiched between the ends of the top plate and the bottom plate to correspond to the light source.

The light source consists of top-lit light-emitting diodes. The top-lit light-emitting diode includes a light-emitting surface, which is parallel to the surface of the strip-shaped flexible circuit board on which the light source is arranged and faces the light-incident end of the light guide plate.

The beneficial effects of the embodiments of the present invention are: the light source module of the present invention has better rigidity; and the backlight module provided by the present invention can be assembled more conveniently and has better yield.

Description of drawings

Fig. 1 is an exploded schematic diagram of an embodiment of a light source module of the present invention;

Fig. 2 is a schematic diagram of an embodiment of the present invention;

Figure 3 is a schematic diagram of different embodiments of the present invention;

Fig. 4 and Fig. 5 are the schematic diagrams of strip stiffening plates of different embodiments;

Figure 6 is a schematic side view of an embodiment of the present invention;

Fig. 7 is a schematic side view of an embodiment with a guiding slope at the top of the side of the light source of the present invention;

Figure 8 is a schematic diagram of a preferred embodiment of the present invention; and

Fig. 9 is a schematic side view of a preferred embodiment of the present invention.

Figure number:

100 light source strips 130 light sources

110 strips of flexible circuit boards 131 light-emitting surfaces

132 card slots 621 incident light end

134 side 640 support seat

300 strip stiffened plates 641 top plate

310 penetration hole 642 bottom plate

320 extended body 660 accommodation space

More than 340 protruding teeth 700 borders

360 surrounding area 800 light source module

400 adhesive layer 900 backlight module

620 light guide plate

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

FIG. 1 is an exploded view of a light source module 800 of the present invention. The light source module 800 of the present invention includes a light source bar 100 and a bar-shaped stiffening plate 300 . The light source bar 100 includes a strip-shaped flexible circuit board 110 and a plurality of light sources 130 . A plurality of light sources 130 are disposed on the strip-shaped flexible circuit board 110 and distributed along the extending direction of the strip-shaped flexible circuit board 110 . Specifically, in this embodiment, the strip-shaped flexible circuit board 110 extends laterally, and a plurality of light sources 130 are disposed on one side of the strip-shaped flexible circuit board 110 along the transverse direction in such a manner that adjacent light sources 130 have the same interval. However, in different embodiments, the intervals between adjacent light sources 130 are not limited to be equal.

The strip-shaped stiffening plate 300 is overlapped and connected to the side of the strip-shaped flexible circuit board 110 provided with the light source 130, and extends along the extension direction of the strip-shaped flexible circuit board 110, and the distribution of the strip-shaped stiffening plate 300 goes around each light source At least one side of the light source 130 exposes a plurality of light sources 130 . That is, the strip-shaped stiffening plate 300 can wrap around the light source 300 , or selectively wrap around more than one side of the light source 130 . Wherein, the rigidity of the strip-shaped stiffener 300 is greater than that of the strip-shaped flexible circuit board 100 . The material of the strip stiffener 300 is preferably a polymer material to have certain rigidity and flexibility. In different embodiments, the material of the strip-shaped stiffening plate 300 can also be a highly reflective material, and by reflecting the light from the light source 130 , the utilization rate of the light can be improved. The strip-shaped flexible circuit board 110 can be connected with the rigid strip-shaped stiffening plate 300 to increase the rigidity. Specifically, when an external force needs to be applied to the strip-shaped flexible circuit board 110 when assembling the backlight module, since the strip-shaped stiffening plate 300 is a single continuous object, the external force can be transmitted through the strip-shaped stiffening plate 300, which is convenient for making the strip-shaped flexible circuit board 110 The circuit board 110 protrudes into the accommodating space and is fixed on the side wall of the supporting seat.

The strip stiffeners 300 can be distributed in various ways and pass around at least one side of each light source 130 and expose a plurality of light sources 130 . For example, in the embodiment shown in FIG. 1 , a plurality of penetration holes 310 are formed on the strip-shaped stiffening plate 300 , and a plurality of light sources 130 respectively pass through the plurality of penetration holes 310 . In a preferred embodiment, the light source 130 includes a top-lit LED, and the top-lit LED includes a light-emitting surface 131 . The light-emitting surface 131 is disposed on the surface of the light source 130 parallel to the strip-shaped flexible circuit board 110 . In other words, as shown in FIG. 2 , after the light source strip 100 is assembled with the strip-shaped stiffening plate 300 , the light source 130 passes through the penetration hole 310 , and the light-emitting surface 131 is exposed on the strip-shaped stiffening plate 300 and is parallel to the strip-shaped flexible circuit board 110 . In this way, while the rigidity of the strip-shaped flexible circuit board 110 can be increased by the strip-shaped stiffening plate 300 , light from the light source 130 can be smoothly emitted.

In different embodiments as shown in FIG. 3 , the strip stiffener 300 includes an elongated body 320 and a plurality of protruding teeth 340 . The extension body 320 extends along the extension direction of the strip-shaped flexible circuit board 110 and is disposed on the same side of the plurality of light sources 130 . A plurality of protruding teeth 340 respectively extend from the extension body 320 along the short side of the strip-shaped flexible circuit board 110 , wherein each protruding tooth 340 protrudes between adjacent light sources 130 . Specifically, each light source 130 has strip-shaped stiffening plates 300 distributed on three sides. The strip-shaped stiffener 300 can be regarded as the skeleton of the strip-shaped flexible circuit board 110 , so as to enhance the rigidity of the strip-shaped flexible circuit board 110 . Wherein, when an external force is applied to the strip-shaped flexible circuit board 110 , the external force can be transmitted by the extension body 320 .

In different embodiments as shown in Fig. 4, the strip-shaped stiffening plate 300 is formed into a zigzag distribution of continuous inflection, and surrounds a plurality of surrounding areas 360 with openings, and a plurality of light sources (see Fig. 3) are respectively accommodated in multiple In a surrounding area 360. Wherein, adjacent enclosing regions 360 have opposite opening directions. In other words, the strip-shaped stiffening plate 300 is distributed in a reciprocating bending manner. The light source 130 is disposed in the concave curved region of the reciprocating curved structure. Similarly, the strip-shaped stiffener 300 can be regarded as the skeleton of the strip-shaped flexible circuit board 110 , so as to enhance the rigidity of the strip-shaped flexible circuit board 110 .

In different embodiments as shown in Fig. 5 , a square frame is formed on the strip-shaped stiffening plate 300 to enclose a penetration hole 310, the frame surrounds a plurality of light sources (not shown in the figure), and the plurality of light sources pass through the penetration hole . In other words, multiple light sources are jointly accommodated in the box. When an external force is applied to the strip-shaped flexible circuit board 110 , the external force can be transmitted by the square-shaped strip-shaped stiffening plate 300 .

The strip-shaped stiffener 300 is adhered to the strip-shaped flexible circuit board 110 through the adhesive layer 400 . Wherein, when the light source bar 100 and the strip-shaped stiffening plate 300 are not yet assembled, the adhesive layer 400 can be separately or selectively coated on the opposite surfaces of the strip-shaped stiffening plate 300 and the strip-shaped flexible circuit board 110 . As shown in the side view of the embodiment shown in FIG. 6 , at least one side 134 of the light source 130 corresponds to the strip-shaped stiffening plate 300 , and the bottom end of the side 134 is formed with a slot 132 , and the strip-shaped stiffening plate 300 extends into the slot 132 . In a preferred embodiment, the top of the side 134 can further incline to form a guiding slope as shown in FIG. 7 . In other words, when the light source bar 100 and the strip-shaped stiffening plate 300 are assembled, the strip-shaped stiffening plate 300 can be guided to the root of the light source 130 through the guide slope at the top of the side 134 , and then extended into the slot 132 . Thereby, it is convenient to assemble the light source bar 100 and the strip-shaped stiffening plate 300 and strengthen the mutual fixing of the two.

In the preferred embodiment shown in FIG. 8 , the strip stiffener 300 can be formed on the side of the frame 700 of the backlight module 900 . Specifically, in this preferred embodiment, a plurality of penetration holes 310 are formed on the side of the frame 700 of the backlight module 900 , and the plurality of light sources 130 respectively pass through the plurality of penetration holes 310 . In different embodiments, the sides of the frame 700 of the backlight module 900 can form a plurality of protruding teeth (see FIG. 3 ), a zigzag distribution of continuous inversions (see FIG. 4 ) or The box penetrates the holes (see Figure 5).

As shown in the side view of the preferred embodiment in FIG. 9 , the backlight module 900 further includes a light guide plate 620 and a supporting base 640 . The light guide plate 620 is disposed inside the frame 700 (see FIG. 8 ), and the light guide plate 620 has a light incident end 621 extending along the strip-shaped flexible circuit board 110 . The light emitting surface 131 of the light source 130 emits light toward the light incident end 621 . The support seat 640 includes a support seat side wall 643 , a top plate 641 and a bottom plate 642 . The top plate 641 and the bottom plate 642 respectively extend in the same direction from the upper and lower ends of the side wall 643 of the supporting seat to enclose a semi-open accommodation space 660 . Wherein, the light source strip 100 and the strip-shaped stiffening plate 300 can be accommodated in the accommodating space 660 , and the light guide plate 620 is interposed between the ends of the top plate 641 and the bottom plate 642 to correspond to the light source 130 .

Although the foregoing description and drawings have disclosed preferred embodiments of the present invention, it must be understood that various additions, modifications and substitutions may be made to the preferred embodiments of the present invention without departing from the invention as defined in the claims The spirit and scope of the principles. Any person skilled in the art will appreciate that the present invention can be employed with many modifications in form, structure, arrangement, proportion, material, element and assembly. Therefore, the embodiments disclosed herein should be regarded as illustrating the present invention rather than limiting the present invention. The scope of the invention should be defined by the claims, which cover their legal equivalents, and not limited by the foregoing description.

Claims (21)

1. A light source module for use by a backlight module, characterized in that the light source module comprises: A light source bar, comprising: a strip of flexible circuit board; and A plurality of light sources are arranged on the strip-shaped flexible circuit board and distributed along the extending direction of the strip-shaped flexible circuit board; and A strip-shaped stiffening plate is overlappingly connected to the side of the strip-shaped flexible circuit board provided with the light source, and extends along the extension direction of the strip-shaped flexible circuit board, and the strip-shaped stiffening plate is distributed around exposing the plurality of light sources through at least one side of each of the light sources; Wherein, the rigidity of the strip-shaped stiffening plate is greater than the rigidity of the strip-shaped flexible circuit board. 2. The light source module according to claim 1, wherein the light source comprises a top light emitting diode, the top light light emitting diode comprises a light emitting surface, the light emitting surface is parallel to the strip soft A circuit board is provided on the surface of the light source. 3. The light source module according to claim 1, wherein the strip-shaped stiffening plate comprises: an extension body, extending along the extension direction of the strip-shaped flexible circuit board, and arranged on the same side of the plurality of light sources, and A plurality of protruding teeth respectively extend from the extension body along the short side of the strip-shaped flexible circuit board, wherein each protruding tooth protrudes between adjacent light sources. 4. The light source module according to claim 1, wherein the strip-shaped stiffening plate is formed in a zigzag distribution of continuous inflection, and encloses a plurality of surrounding areas with openings, and the plurality of light sources respectively accommodate In the plurality of surrounding areas; wherein adjacent surrounding areas have opposite opening directions. 5. The light source module according to claim 1, wherein a plurality of penetration holes are formed on the strip-shaped stiffening plate, and the plurality of light sources pass through the plurality of penetration holes respectively. 6. The light source module according to claim 1, wherein the strip-shaped stiffening plate is a frame to enclose a penetration hole, the frame surrounds the plurality of light sources and each of the plurality of light sources through the through hole. 7. The light source module according to claim 1, wherein the strip-shaped stiffening plate is bonded to the strip-shaped flexible circuit board through an adhesive layer. 8. The light source module according to claim 1, wherein at least one side of the light source corresponds to the strip-shaped stiffening plate, a slot is formed at the bottom end of the side, and the strip-shaped stiffening plate The board extends into the slot. 9 . The light source module according to claim 8 , wherein a top end of the side is inclined inwardly to form a guiding slope. 10. The light source module according to claim 1, wherein the material of the strip-shaped stiffening plate includes a high reflection material. 11. A backlight module, characterized in that, the backlight module comprises: A light source bar, comprising: a strip of flexible circuit board; and A plurality of light sources are arranged on the strip-shaped flexible circuit board and distributed along the extending direction of the strip-shaped flexible circuit board; and A frame, wherein one side of the frame is formed as a strip-shaped stiffening plate, and the strip-shaped stiffening plate is overlapped and connected to the side of the strip-shaped flexible circuit board provided with the light source, and along the strip-shaped The extending direction of the flexible circuit board extends, and the strip-shaped stiffeners are distributed and wound around at least one side of each light source and expose the plurality of light sources; Wherein, the rigidity of the strip-shaped stiffening plate is greater than the rigidity of the strip-shaped flexible circuit board. 12. The backlight module according to claim 11, wherein the backlight module further comprises: A light guide plate is arranged in the frame, the light guide plate has a light incident end extending along the strip-shaped flexible circuit board, and the light source emits light toward the light incident end; and A support seat, including a support seat side wall, a top plate and a bottom plate; the top plate and the bottom plate respectively extend in the same direction from the upper and lower ends of the support seat side wall to enclose a semi-open accommodating space wherein the light source strip and the strip-shaped stiffening plate are accommodated in the accommodating space, and the light guide plate is sandwiched between the ends of the top plate and the bottom plate to correspond to the light source. 13. The backlight module according to claim 12, wherein the light source comprises a top-light LED, and the top-light LED comprises a light-emitting surface, and the light-emitting surface is parallel to the strip-shaped soft The permanent circuit board is disposed on the surface of the light source and faces the light incident end of the light guide plate. 14. The backlight module according to claim 11, wherein the strip stiffener comprises: an extension body, extending along the extension direction of the strip-shaped flexible circuit board, and arranged on the same side of the plurality of light sources, and A plurality of protruding teeth respectively extend from the extension body along the short side of the strip-shaped flexible circuit board, wherein each protruding tooth protrudes between adjacent light sources. 15. The backlight module according to claim 11, wherein the strip-shaped stiffening plate is formed in a zigzag distribution of continuous inflection, and encloses a plurality of surrounding areas with openings, and the plurality of light sources respectively accommodate In the plurality of surrounding areas; wherein adjacent surrounding areas have opposite opening directions. 16. The backlight module according to claim 11, wherein a plurality of penetration holes are formed on the strip-shaped stiffening plate, and the plurality of light sources respectively pass through the plurality of penetration holes. 17. The backlight module according to claim 11, wherein the strip-shaped stiffening plate is a frame to enclose a penetration hole, the frame surrounds the plurality of light sources and each of the plurality of light sources through the through hole. 18. The backlight module according to claim 11, wherein the strip-shaped stiffening plate is adhered to the strip-shaped flexible circuit board through an adhesive layer. 19. The backlight module according to claim 11, wherein the material of the strip-shaped stiffening plate comprises a high reflection material. 20. The backlight module according to claim 11, wherein at least one side of the light source corresponds to the strip-shaped stiffening plate, a slot is formed at the bottom of the side, and the strip-shaped stiffening plate The board extends into the slot. 21. The backlight module according to claim 20, wherein the top of the side is inclined inwardly to form a guiding slope.

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