CN105807495B - The manufacturing method of backlight module and backboard - Google Patents

Abstract

The invention discloses a manufacturing method of a backlight module and a backboard, belonging to the field of display device manufacturing. The backlight module includes: a back plate and a plastic frame; the back plate includes a bottom plate, and baffles formed on four sides of the bottom plate; a strip-shaped cover plate and at least one lug are formed on the side of the first baffle away from the bottom plate, The first baffle plate, the strip-shaped cover plate and the at least one lug are integrally structured; the plastic frame is a frame body with an opening formed on one side, and the plastic frame can be engaged on both sides of the strip-shaped cover plate through the opening. end, and after being engaged, the side where the opening of the plastic frame is located overlaps with the orthographic projection of the at least one lug on the side of the first baffle. Therefore, the plastic frame can form a back-shaped support surface together with the strip-shaped cover plate in the back plate. Because the support effect of the plastic frame is better, when the display panel is attached to the backlight module, the display panel The surrounding force can be evenly applied, thereby reducing the probability of damage to the display panel. The invention is used to provide a light source for a display panel.

Description

Backlight module and manufacturing method of backplane

technical field

The invention relates to the field of display device manufacturing, in particular to a backlight module and a backplane manufacturing method.

Background technique

The backlight module (English: Back Light; abbreviation: BL) is a light source component fixed behind the liquid crystal display (English: LiquidCrystal Display; abbreviation: LCD). Diffusion sheet or reflection sheet, etc.), back plate and plastic frame, wherein the back plate is used to carry the light source and light guide plate, and the plastic frame is used to fix the optical film on the light guide plate. Referring to FIG. 1 , a plurality of lugs 01 with through holes may be provided around the backplane 00 , and the backlight module and other components in the display device can be fixed through the lugs 01 .

In the related art, as shown in FIG. 2 , the backplane 00 generally includes a base plate 02 , a baffle plate 03 arranged around the base plate 02 and a cover plate 04 , wherein, referring to FIG. 1 , the cover plate 04 is located on the back plate for setting a light source. One side (that is, the side where the flexible circuit board 05 is set in FIG. 1 ). One side of the rectangular plastic frame 06 is provided with an opening, and the plastic frame 06 can be engaged with both ends of the cover plate 04 through the opening. In order to reduce the manufacturing cost of the back plate, when the back plate is molded, the cover plate can be a complete strip structure. Referring to Figure 2, when the back plate is used to set the light source on one side to form a lug, the cover plate 04 Cut the corresponding area on the top, and fold the cut area to form the lug 01. Since the lug 01 forms a gap on the cover plate 04, in order to ensure the flatness of the cover plate 04, referring to FIG. 3 (FIG. 3 is a cross-sectional view of FIG. 1 in the direction AA), the back plate 00 is sequentially provided with light sources 035 And the light guide plate 034, the rubber filling layer 032 is set on the light guide plate 034 corresponding to the gap formed by the lug 01, and the two sides of the rubber filling layer 032 are respectively provided with adhesive tapes 031 for fixing the rubber filling layer 032.

However, when the backlight module is bonded to the display panel, since the rubber filling layer on the cover plate has poor support ability, the display panel is subjected to uneven force and is easy to be damaged.

Contents of the invention

In order to solve the problem in the related art that the support ability of the backlight module is poor and the display panel is easy to be damaged, the present invention provides a manufacturing method of the backlight module and the backplane. Described technical scheme is as follows:

In one aspect, a backlight module is provided, and the backlight module includes: a backplane and a plastic frame;

The back plate includes a bottom plate, and baffles formed on four sides of the bottom plate;

The side of the first baffle away from the bottom plate is formed with a strip-shaped cover and at least one lug, the first baffle, the strip-shaped cover and the at least one lug are integrally structured, and the first The baffle is located on one side of the bottom plate for setting the light source;

The plastic frame is a frame body with an opening formed on one side, and the plastic frame can be engaged with both ends of the strip-shaped cover plate through the opening, and after the engagement, the side where the opening of the plastic frame is located and the Orthographic projections of at least one lug on the side of the first baffle overlap, and the side of the first baffle is perpendicular to the upper surface of the bottom plate.

Optionally, the length of the strip-shaped cover is shorter than the length of the first baffle, and the central axis in the length direction of the strip-shaped cover is collinear with the central axis in the length direction of the first baffle.

Optionally, two lugs are formed on the side of the first baffle away from the bottom plate, and the two lugs are respectively located at both ends of the strip-shaped cover plate and distributed symmetrically along the first central axis, The first central axis is the central axis in the longitudinal direction of the strip cover plate.

Optionally, there is a gap between the orthographic projection of each lug on the bottom plate and the orthographic projection of the strip cover plate on the bottom plate.

Optionally, the strip-shaped cover plate and the bottom plate are parallel to each other; each of the lugs is parallel to the bottom plate.

Optionally, at least one lug is provided on a side of the second baffle of the back plate away from the bottom plate, and the second baffle is disposed opposite to the first baffle.

Optionally, the lugs formed on the first baffle and the lugs provided on the second baffle are symmetrically distributed along a second central axis, and the second central axis is the width direction of the bottom plate. central axis.

Optionally, the width of the first side of the plastic frame is greater than the width of the second side of the plastic frame, the first side is close to the first baffle, and the second side is close to the first For the second baffle, the width directions of the first side and the second side are respectively perpendicular to the length direction of the strip-shaped cover.

Optionally, the backboard is made of metal material.

In a second aspect, a method for manufacturing a backplane is provided, the method comprising:

A molded backboard main body is obtained through a preset mold, and the backboard main body includes a bottom plate, baffles formed on four sides of the bottom plate, and a strip-shaped cover, wherein the first baffle is formed on a side far away from the bottom plate. The strip-shaped cover, the first baffle is formed on one side of the bottom plate for setting the light source;

At least one of the two ends of the strip-shaped cover is cut along the width direction of the strip-shaped cover, and the length of each cutting slit is equal to the width of the strip-shaped cover;

On the strip-shaped cover, the area between each of the cut slits and the end surface close to the strip-shaped cover is folded in a direction away from the bottom plate, so that the turning of the strip-shaped cover The area forms at least one lug, and the unfolded area forms a strip-shaped cover.

Optionally, after the area between each of the cut slits and the end face of the strip-shaped cover on the strip-shaped cover is folded away from the bottom plate, the Methods also include:

Cutting the end of the strip-shaped cover plate close to the at least one lug, so that there is a gap between the cut end surface of the strip-shaped cover plate and each of the lugs.

The beneficial effects brought by the technical solution provided by the embodiments of the present invention are:

The embodiment of the present invention provides a backlight module and a method for manufacturing the backplane. One side of the first baffle of the backlight module is formed with a strip-shaped cover plate and at least one lug. The plastic frame in the backlight module can snapped to both ends of the strip cover, and after snapping, the side where the opening of the plastic frame is located overlaps with the orthographic projection of the at least one lug on the side of the first baffle, so the plastic frame can be positioned on the back In the panel, together with the strip cover plate, a back-shaped support surface is formed. Since the support effect of the plastic frame is better, when the display panel is attached to the backlight module, the force around the display panel can be uniform, thereby reducing the the probability of damage to the display panel.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

FIG. 1 is a schematic structural view of a backlight module in the related art;

FIG. 2 is a schematic structural diagram of a backplane in the related art;

Fig. 3 is a cross-sectional view of Fig. 1 in the direction of AA;

FIG. 4 is a schematic top view of a backlight module provided by an embodiment of the present invention;

Fig. 5 is a schematic structural diagram of a backplane provided by an embodiment of the present invention;

Fig. 6 is a sectional view of Fig. 4 in the direction of BB;

Fig. 7 is a schematic structural diagram of another backplane provided by an embodiment of the present invention;

Fig. 8 is a flowchart of a manufacturing method of a backplane provided by an embodiment of the present invention;

Fig. 9 is a schematic structural diagram of a backplane main body provided by an embodiment of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

FIG. 4 is a schematic structural diagram of a backlight module provided by an embodiment of the present invention. As shown in FIG. 4 , the backlight module may include: a backplane 10 and a plastic frame 11;

Referring to FIG. 5 , the backboard 10 may include a bottom plate 101, and baffles 102 formed on four sides of the bottom plate 101, a strip-shaped cover 103 and at least one lug 104 are formed on the side of the first baffle 102a away from the bottom plate 101, The first baffle 102a, the bar-shaped cover 103 and the at least one lug 104 are integrally formed. The first baffle 102a is located on one side of the bottom plate 101 for setting a light source (not shown in FIG. 5 ).

Referring to Fig. 4, the plastic frame 11 is a frame body with an opening formed on one side, the plastic frame 11 can be engaged with the two ends of the strip cover plate 103 through the opening, and after being engaged, the side where the opening of the plastic frame 11 is located It overlaps with the orthographic projection of the at least one lug 104 on the side of the first baffle 102a, wherein the side of the first baffle 102a is perpendicular to the upper surface of the bottom plate. It can also be seen from the top view of the backlight module shown in FIG. 4 that the side of the lug 104 close to the first baffle 102 a is in line with the outer edge of the plastic frame 11 after being engaged.

To sum up, the embodiment of the present invention provides a backlight module, one side of the first bezel of the backlight module is formed with a strip-shaped cover and at least one lug, and the plastic frame in the backlight module can be snapped Fitted on both ends of the strip-shaped cover plate, and after being engaged, the side where the opening of the plastic frame is located overlaps with the orthographic projection of the at least one lug on the side of the first baffle plate, so the plastic frame can be placed in the back plate , together with the strip-shaped cover form a back-shaped support surface. Since the plastic frame has a better support effect, when the display panel is attached to the backlight module, the display panel can be evenly stressed around the display panel, thereby reducing the display. Probability of panel damage.

It should be noted that, in practical applications, referring to FIG. 6 (FIG. 6 is a cross-sectional view of FIG. 4 in the direction of BB), the backplane may be provided with a light source 035 and a light guide plate 034, and the light guide plate 034 may be attached with Adhesive tape 031, after the plastic frame 11 is snapped on the two ends of the strip cover plate (not shown in Fig. 6) through the opening, it can be fixed in the backboard by this adhesive tape 031, as shown in Fig. 6, because the at least one The thickness of the lug 104 is smaller than the thickness of the plastic frame 11, so the orthographic projection of the first lug 104 on the side of the first baffle 102a can be located at the side of the opening of the plastic frame 11 on the side of the first baffle 102. Inside. The upper surface of the snapped and fixed plastic frame 11 and the upper surface of the lug 104 are located on the same plane, and the upper surface of the plastic frame 11 and the upper surface of the strip cover are also located on the same plane, so as to ensure that the plastic frame 11 and the flatness of the back-shaped support surface formed by the strip cover plate.

Optionally, referring to Fig. 4 and Fig. 5, the length of the strip-shaped cover 103 is shorter than the length of the first baffle 102a, and the central axis of the strip-shaped cover 103 in the longitudinal direction is in line with the length of the first baffle 102a. The central axes are collinear, and the central axis is shown as the straight line m in Fig. 4 and Fig. 5, that is, the bar-shaped cover plate 103 is formed centrally on the side of the first baffle plate 102a away from the bottom plate 101, so that the entire back plate can be guaranteed Symmetry of the structure.

Optionally, as shown in FIG. 4 and FIG. 5 , in the embodiment of the present invention, two lugs 104 may be formed on the side of the first baffle plate 102a away from the bottom plate, and the two lugs 104 are respectively located on the side of the bar. The two ends of the strip-shaped cover plate 103 are symmetrically distributed along the first central axis m, the first central axis m is the central axis in the length direction of the strip-shaped cover plate 103, and the two lugs 104 are symmetrically distributed to ensure that the backlight module Stability of groups when connected with other components.

Optionally, in this embodiment of the present invention, there is a gap between the orthographic projection of each lug 104 on the bottom plate 101 and the orthographic projection of the strip cover plate 103 on the bottom plate 101. For example, refer to FIG. 7 , each lug There is a preset distance d between the side of 104 close to the strip cover 103 and the end face of the strip cover 103, and the preset distance d is greater than zero. end, the length of the opening area of the plastic frame 11 is relatively short, and the length of the two sections of the frame on the side where the opening of the plastic frame 11 is located (that is, the side close to the first baffle 102a) is longer, thereby ensuring that the lug 104 The support stability of the corresponding area. Wherein, the length direction of the opening area of the plastic frame 11 is parallel to the length direction of the strip cover plate 103 .

Optionally, referring to FIG. 5 , the strip cover plate 103 and the bottom plate 101 are parallel to each other; each lug 104 is parallel to the bottom plate 101 . In the embodiment of the present invention, both the strip-shaped cover plate 103 and the bottom plate 101 can be a regular cubic structure, and the strip-shaped cover plate 103 and the bottom plate 101 are parallel to each other. The sides of the base plate 101 close to the strip cover plate 103 are parallel to each other; in addition, each lug 104 can be a cube provided with at least one through hole, and the mutual parallelism between the lug 104 and the base plate 101 means that the lug 104 is close to the base plate 101 One side of the bottom plate 101 is parallel to the side close to the lug 104 .

Further, referring to FIG. 7, at least one lug 105 may also be provided on the side of the second baffle 102b of the back plate 10 away from the bottom plate. The second baffle 102b is set opposite to the first baffle 102a and formed The lugs 104 on the first baffle 102a and the lugs 105 on the second baffle 102b are distributed symmetrically along the second central axis n, which is the central axis in the width direction of the bottom plate. The lugs 104 and the lugs 105 are symmetrically distributed along the second central axis n, which can ensure the stability of the backlight module when it is connected with other components.

Optionally, referring to FIG. 7, two second lugs 106 may also be provided between the two lugs 104 on the first baffle 102a, and the two second lugs 106 may be used to connect the printed circuit board (English: Printed Circuit Board; Abbreviation: PCB). It should be noted that, in practical applications, the lug 105 disposed on the second baffle 102 b and the second lug 106 disposed on the first baffle 102 a and the back plate 10 may also be integrally formed.

Optionally, in practical applications, as shown in FIG. 7, the width w1 of the first side of the plastic frame 11 may be greater than the width w2 of the second side of the rubber frame 11, and the first side is close to the first baffle 102a, the second side is close to the second baffle 102b, and the width directions of the first side and the second side are perpendicular to the length direction of the strip cover 103 respectively.

In the embodiment of the present invention, the back plate 10 may be made of a metal material, for example, an alloy material. The metal material has high strength and hardness and can ensure the stability of the lug.

It should be noted that when the backlight module is assembled, adhesive tape can be pasted on the side of the plastic frame 11 so as to fix the optical film in the plastic frame 11, and it can also be pasted on the strip cover plate 103. An adhesive tape is attached so that the backlight module can be attached to the display panel.

To sum up, the embodiment of the present invention provides a backlight module, one side of the first bezel of the backlight module is formed with a strip-shaped cover and at least one lug, and the plastic frame in the backlight module can be snapped Fitted on both ends of the strip cover, and after snapping, the side where the opening of the plastic frame is located overlaps with the orthographic projection of the at least one lug on the side of the first baffle, so the plastic frame can be placed on the back plate Inside, together with the strip-shaped cover plate, a back-shaped support surface is formed. Due to the better support effect of the plastic frame, when the display panel is attached to the backlight module, the force around the display panel can be uniform, thereby reducing the Displays the probability of panel damage.

Fig. 8 is a flow chart of a method for manufacturing a backplane provided by an embodiment of the present invention. As shown in Fig. 8, the method may include:

Step 801: Obtain a once-formed backplane main body through a preset mold. The backplane main body includes a bottom plate, baffles formed on four sides of the bottom plate, and a strip-shaped cover, wherein the side of the first baffle far away from the bottom plate is formed with the As for the strip-shaped cover, the first baffle is formed on one side of the bottom plate for setting the light source.

Step 802 , cutting at least one of the two ends of the strip-shaped cover along the width direction of the strip-shaped cover, and the length of each cutting slit is equal to the width of the strip-shaped cover.

Step 803, on the strip-shaped cover, the area between each cut slit and the end surface of the strip-shaped cover is turned in a direction away from the bottom plate, so that the flipped area on the strip-shaped cover is formed At least one lug, the unfolded area forms a strip cover.

To sum up, the embodiment of the present invention provides a method for manufacturing a backplane. The main body of the backplane is molded at one time, and the lugs are formed after cutting the strip-shaped cover, thereby reducing the manufacturing cost of the backplane. , and when the plastic frame is arranged in the main body of the backplane, the plastic frame can form a back-shaped support surface together with the strip cover, so that when the display panel is attached to the backlight module, the display panel can be evenly force, thereby reducing the probability of damage to the display panel.

In the above step 801, the main body of the backboard can be made of a metal plate through the preset mold at one time. The main body of the backboard can be shown in FIG. Strip cover 13.

In the above step 802, at least one of the two ends of the strip-shaped cover 13 can be cut along the width direction of the strip-shaped cover 13, and the length of each cutting slit is equal to the width of the strip-shaped cover 13 . For example, referring to FIG. 9 , the two ends of the strip cover 13 can be cut along the cutting line w and the cutting line z respectively, assuming that the vertical distance between the cutting line w and the left end surface of the strip cover 13 is The first distance d1, the vertical distance between the cutting line z and the right end surface of the strip cover plate 13 is the second distance d2, then the first distance d1 and the second distance d2 can be equal to ensure that the strip The lengths of the two lugs formed by the shaped cover 13 are equal, wherein the length direction of each lug is parallel to the length direction of the bar-shaped cover.

In the above step 803, after the area between each cut slit on the strip-shaped cover 13 and the end surface close to the strip-shaped cover 13 is folded away from the bottom plate 101, the structure of the back plate can be As shown in FIG. 5 , the overturned area on the strip-shaped cover 13 in FIG. 9 forms at least one lug 104 shown in FIG. 5 , and the unturned area on the strip-shaped cover 13 in FIG. The strip cover 103 shown in. Wherein, the through hole in each lug 104 can be formed through the preset mold at one time, or can be processed after the back plate is demoulded, which is not limited in the embodiment of the present invention.

Further, after the above step 803, with reference to FIG. 5 , the end of the strip cover 103 close to the at least one lug 104 can also be cut, so that the end surface of the cut strip cover and each lug There is a gap between them. For example, the strip cover plate 103 can be cut along the cutting lines j and k respectively, wherein the cutting lines j and k are both fold lines. Referring to FIG. 7, the end surface of the strip cover plate 103 after cutting There is a clearance d from the lug.

To sum up, the embodiment of the present invention provides a method for manufacturing a backplane. A molded backplane main body is obtained through a preset mold. At least one of the two ends of the strip-shaped cover in the backplane main body can be The strip cover is cut in the width direction, and then the area between each cutting slit and the end face of the strip cover is folded in a direction away from the bottom plate, so that the overturn on the strip cover The area forms at least one lug, and the unfolded area forms a strip-shaped cover. Since the main body of the backboard is molded at one time, and the lugs are formed after cutting the strip-shaped cover, the manufacturing cost of the backboard is reduced, and when the plastic frame is arranged in the main body of the backboard, the plastic frame can be connected with the The strip-shaped cover plates together form a back-shaped support surface, which can make the display panel be evenly stressed around the display panel when the display panel is attached to the backlight module, thereby reducing the probability of damage to the display panel.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (11)

1. a kind of backlight module, which is characterized in that the backlight module includes: backboard and glue frame；

The backboard includes bottom plate, and is formed in the baffle on four side of bottom plate；

First baffle is formed with bar shaped cover board and at least one lug far from the bottom plate on one side, the first baffle, described Bar shaped cover board and at least one described lug are structure as a whole, and the first baffle is located at the bottom plate for being arranged the one of light source Side；

The glue frame is the framework that one side is formed with opening, and the glue frame can be fastened on the bar shaped cover board by the opening Both ends, and after engaging, the positive throwing of side where glue frame opening and at least one described lug in the first baffle side Shadow overlapping, the upper surface of the side of the first baffle perpendicular to the bottom plate.

2. backlight module according to claim 1, which is characterized in that

The length of the bar shaped cover board be less than the first baffle length, and the central axes of the bar shaped cover board length direction with The central axes of the first baffle length direction are conllinear.

3. backlight module according to claim 2, which is characterized in that

There are two lug, described two lugs to be located at the bar shaped for formation on one side of the first baffle far from the bottom plate The both ends of cover board, and it is symmetrical along the first central axes, first central axes are the axis of the bar shaped cover board length direction Line.

4. backlight module according to claim 1, which is characterized in that

In the orthographic projection of the bottom plate, there are gaps with the bar shaped cover board in the orthographic projection of the bottom plate for each lug.

5. backlight module according to claim 1, which is characterized in that

The bar shaped cover board is parallel to each other with the bottom plate；Each lug is parallel to each other with the bottom plate.

6. backlight module according to claim 1, which is characterized in that

The second baffle of the backboard is provided at least one lug far from the bottom plate on one side, the second baffle with it is described First baffle is oppositely arranged.

7. backlight module according to claim 6, which is characterized in that

The lug being formed on the first baffle symmetrically divides with the lug being arranged on the second baffle along the second central axes Cloth, second central axes are the central axes in the baseplate width direction.

8. backlight module according to claim 6, which is characterized in that

The width of the glue frame first side is greater than the width of the glue frame second side, and the first side is close to described first Baffle, the second side close to the second baffle, the width direction of the first side and the second side respectively with The length direction of the bar shaped cover board is vertical.

9. backlight module according to any one of claims 1 to 8, which is characterized in that

The backboard is made of metal material.

10. a kind of manufacturing method of backboard, which is characterized in that the described method includes:

One-time formed back plate main body is obtained by preset die, the back plate main body includes bottom plate, is formed in the bottom plate four The baffle and bar shaped lid on side, wherein first baffle is stated bar shaped lid far from the formation on one side of the bottom plate, and described first Baffle is formed in the bottom plate for one side of light source to be arranged；

To at least one end in bar shaped lid both ends, the width direction along the bar shaped lid is cut, each cutting The length of seam is equal with the width of the bar shaped lid；

By on the bar shaped lid, each cutting is stitched and the region between bar shaped lid end face, to far from institute The direction for stating bottom plate is turned down, so that the overturning region on the bar shaped lid forms at least one lug, does not turn down region Form bar shaped cover board.

It is each described to cut 11. according to the method described in claim 10, it is characterized in that, described by the bar shaped lid Slot and the region between bar shaped lid end face, after being turned down to the direction far from the bottom plate, the side Method further include:

The bar shaped cover board is cut close to one end of at least one lug, so that the end of the bar shaped cover board after cutting There are gaps between face and each lug.