CN207907021U - A kind of backlight module - Google Patents

Abstract

The utility model discloses a kind of backlight modules, it includes PCB and light guide plate, the PCB is set to the side of the light guide plate, the side both ends are equipped with elongated portion, the lower surface of the elongated portion is equipped with support slot, at least one first convex block is additionally provided on the side, first convex block is equipped with buckle, and the PCB is equipped with avoiding hollow groove corresponding with first convex block.When installation, PCB is first inserted into the support slot of light guide plate, then make PCB slightly stress bendings to be connected on the first convex block by buckle again, to make PCB effectively be fixed, its is simple in structure, without using materials such as double-sided adhesive or glue, the hidden danger that prevents glue from entering the hidden danger of vision area and double-sided adhesive or glue is prevented to fail under special circumstances, the first convex block also can prevent the LED light on PCB to be pressed onto light guide plate simultaneously, prevent LED light from failing.

Description

A kind of backlight module

Technical field

The utility model is related to a kind of display technology fields, more specifically to a kind of backlight module.

Background technology

In traditional backlight module, the fixed form of light guide plate and PCB are fixed generally by double-sided adhesive or glue. But can increase assembling procedure using double-sided adhesive fixation PCB and material can be increased, and if using glue to fix, drip adhesive process Complexity, and there are the hidden danger that glue enters vision area；In addition as under the specific conditions such as high temperature there is failure in double-sided adhesive or glue Hidden danger.

Utility model content

The technical problem to be solved by the utility model is to provide a kind of backlight module, when installation, first PCB insertions are led Then the support slot of tabula rasa makes PCB slightly stress bendings to be connected on the first convex block by buckle, to make PCB obtain again It is fixed to effective, it is simple in structure, without using materials such as double-sided adhesive or glue, prevents glue from entering the hidden danger of vision area and prevent The hidden danger that double-sided adhesive or glue fail under special circumstances, while the first convex block also can prevent the LED light on PCB to be pressed onto leaded light Plate prevents LED light from failing.

Technical problem to be solved in the utility model is achieved by the following technical programs：

In order to solve the above technical problems, the utility model provides a kind of backlight module comprising PCB and light guide plate, institute The side that PCB is set to the light guide plate is stated, the side both ends are equipped with elongated portion, and the lower surface of the elongated portion is equipped with support Slot is additionally provided at least one first convex block on the side, and first convex block is equipped with buckle, and the PCB is equipped with and institute State the corresponding avoiding hollow groove of the first convex block.

Further, the width of the support slot is the 105%-115% of the PCB thickness.

Further, at least one second convex block is additionally provided on the side.

Further, the backlight module further includes the anti-dazzling screen outside the PCB and the light guide plate, the PCB Pass through the anti-dazzling screen bound edge with the light guide plate.

Further, the both ends PCB are equipped with notch corresponding with the support slot.

The utility model has the advantages that：When installation, PCB is first inserted into the support slot of light guide plate, is then made again PCB slightly stress bendings are simple in structure to make PCB effectively be fixed to be connected on the first convex block by buckle, Without using materials such as double-sided adhesive or glue, prevents glue from entering the hidden danger of vision area and prevent double-sided adhesive or glue in special feelings The hidden danger to fail under condition, while the first convex block also can prevent the LED light on PCB to be pressed onto light guide plate, prevent LED light from failing.

The width of support slot is the 105%-115% of PCB thickness, and such width can make PCB be easy to be inserted into support slot, and can To prevent PCB radial motions, PCB can be made to be completely fixed.

Description of the drawings

Fig. 1 is a kind of back light module unit structure schematic diagram provided by the utility model.

Fig. 2 is a kind of backlight module improved structure schematic diagram provided by the utility model.

Fig. 3 is the improved structure schematic diagram of PCB.

Specific implementation mode

The utility model is described in detail with reference to embodiment, embodiment is only the preferred reality of the utility model Mode is applied, is not the restriction to the utility model.

Referring to Fig. 1, being a kind of backlight module provided by the utility model comprising PCB1 and light guide plate 2, the PCB1 Set on the side of the light guide plate 2 21,21 both ends of the side are equipped with elongated portion 22, and the lower surface of the elongated portion 22, which is equipped with, holds Bracket 23, the support slot 23 can be used for support PCB1, can be lower surfaces and opposite with elongated portion described in another 22 The groove that notch 12 is opened up on surface can also be that four sides are equipped with opening L-type elongated portion 22 and form the support slot 23, this Embodiment is preferably for the former, can preferably limit the radial motion of PCB1, prevent PCB1 from falling off；It is also set on the side 21 There are at least one first convex block 24, first convex block 24 to be equipped with buckle 25, the PCB1 is equipped with and first convex block 24 corresponding avoiding hollow grooves 11.When installation, PCB1 is first inserted into the support slot 23 of light guide plate 2, then makes PCB1 slightly stress again Bending is simple in structure to make PCB1 effectively be fixed to be connected on the first convex block 24 by buckling 25, without making With materials such as double-sided adhesive or glue, prevents glue from entering the hidden danger of vision area and double-sided adhesive or glue is prevented to lose under special circumstances The hidden danger of effect, while the first convex block 24 also can prevent the LED light on PCB1 to be pressed onto light guide plate 2, prevent LED light from failing.

Further, the width of the support slot 23 is the 105%-115% of the PCB1 thickness, and such width can make PCB1 is easy to be inserted into support slot 23, and can prevent PCB1 radial motions, PCB1 can be made to be completely fixed.

Further, at least one second convex block 26 is additionally provided on the side 21, second convex block 26 and the first convex block 24 keep concordant, prevent the LED light on PCB1 to be pressed onto light guide plate 2, prevent LED light from failing.

Further, the both ends PCB1 are equipped with notch 12 corresponding with the support slot 23, and PCB1 can be lacked by this Mouth 12 is fixed on support slot 23, prevents from shifting.

Referring to Fig. 2, further, the backlight module further includes the screening outside the PCB1 and the light guide plate 2 Mating plate 3, the PCB1 and the light guide plate 2 can be selected the only sticking anti-dazzling screen 3 of one side and wrapped by 3 bound edge of the anti-dazzling screen Side, can dust-proof leak-proof light, light guide plate 2 and PCB1 can also be further fixed.

Referring to Fig. 3, further, which includes substrate layer 13, the upper surface of substrate layer 13 is provided with circuit layer 14, The lower surface of substrate layer 13 is provided with metallic radiating layer 15, and set-up mode can be circuit layer 14, the difference of metallic radiating layer 15 By sticking double faced adhesive tape on substrate layer 13.Due to the thinner thickness of substrate layer 13, the heat on PCB1 can pass through substrate layer 13 are diffused into metallic radiating layer 15, which can effectively increase the heat dissipation area of PCB1, play Homogeneouslly-radiating Effect, to improve the radiating efficiency of PCB1.Wherein substrate layer 13 can be polyimides, polyester, polysulfones or polytetrafluoroethyl-ne Any one in alkene, double faced adhesive tape are any one in acrylic acid glue-line or epoxy glue layer, which can Think copper foil layer.

Further, PCB1 further includes at least one through the logical of substrate layer 13, circuit layer 14 and metallic radiating layer 15 Hole 16, the inner wall of the through-hole 16 are provided with the heat-conducting layer contacted with circuit layer 14, metallic radiating layer 15, using good at through-hole 16 Heat conductivility, the circuit layer 14 and metallic radiating layer 15 of 13 both sides of substrate layer can be electrically connected, play good heat conduction work( Can, and heat-conducting layer can provide heat conduction function, to reach good heat dissipation effect.Wherein, which can be copper glue conductive oil Layer of ink.

Further, it is provided with the heat carrier being connect with external conductive structure in through-hole 16, the heat carrier is from circuit layer 14 side is connected with external conductive structure, is also in contact with the heat-conducting layer in through-hole 16, so that circuit layer 14, metal dissipate Thermosphere 15 can be connected by through-hole 16 with external conductive structure, so that the heat in PCB1 passes through in the through-hole 16 Heat carrier diffuses to external conductive structure, to further increase the radiating efficiency of PCB1.Preferably, in order to allow through-hole 16 with External conductive structure is connected, which is set to the marginal position of PCB1.

Further, the metallic radiating layer 15 be uniform radiating structure, structure can be reticular structure, strip structure, Any one in wavelike structure or honeycomb structure can preferably improve heat dissipation effect by the uniform radiating structure.

Above example only expresses the embodiment of the utility model, the description thereof is more specific and detailed, but can not Therefore it is interpreted as the limitation to the utility model patent range, as long as the form using equivalent substitution or equivalent transformation is obtained Technical solution, shall fall within the scope of the present invention.

Claims (5)

1. a kind of backlight module, which is characterized in that it includes PCB and light guide plate, and the PCB is set to the side of the light guide plate, The side both ends are equipped with elongated portion, and the lower surface of the elongated portion is equipped with support slot, is additionally provided on the side at least one First convex block, first convex block are equipped with buckle, and the PCB is equipped with avoiding hollow groove corresponding with first convex block.

2. backlight module according to claim 1, which is characterized in that the width of the support slot is the PCB thickness 105%-115%。

3. backlight module according to claim 1, which is characterized in that it is convex to be additionally provided at least one second on the side Block.

4. backlight module according to claim 1, which is characterized in that further include outside the PCB and the light guide plate Anti-dazzling screen, the PCB and the light guide plate pass through the anti-dazzling screen bound edge.

5. backlight module according to claim 1, which is characterized in that the both ends PCB are equipped with opposite with the support slot The notch answered.