Rubber frame, backlight module, rubber frame mold and manufacturing method of rubber frame

Abstract

The invention provides a rubber frame, a backlight module, a rubber frame mold and a manufacturing method of the rubber frame. The rubber frame comprises a rubber frame body and at least one supporting strip. The rubber frame body surrounds the peripheral side of an optical film layer of the backlight module. The rubber frame main body comprises a plurality of frames which are respectively arranged along each edge of the optical film layer; the at least one support strip is embedded in at least one of the plurality of frames, and the extension direction of the support strip is the same as the extension direction of the corresponding frame; the material strength of the supporting strips is larger than that of the rubber frame body, so that the strength and deformation resistance of the rubber frame can be improved, the problem that the rubber frame is too large in deformation due to insufficient strength of the rubber frame is solved, the supporting force of the rubber frame on the backlight module can be improved, and the fragment risk of the backlight module is reduced.

Description

Technical Field

[0001] The present invention belongs to the field of display technology, and in particular relates to a rubber frame, a backlight module, a rubber frame mold and a method for manufacturing the rubber frame. Background Art

[0002] Mini-LED (Mini Light Emitting Diode) has been favored in recent years due to its small size, high brightness and other advantages, and is often used in display devices in recent years. The display device may include a backlight module and a liquid crystal display panel. The backlight module includes a light board with multiple light-emitting elements. The light-emitting elements may specifically be Mini-Led (sub-millimeter light-emitting diodes). In the related art, the backlight module includes two structures: a direct-down light board and an edge-entry light board. Summary of the invention

[0003] The present invention at least partially solves the problem that the existing Mini-Led device backlight module glue frame has poor resistance to deformation, and provides a glue frame, a backlight module, a glue frame mold and a method for manufacturing the glue frame.

[0004] An embodiment of the present invention provides a plastic frame of a backlight module, the plastic frame comprising:

[0005] A plastic frame body, surrounding the outer peripheral side of the optical film layer of the backlight module; the plastic frame body comprises a plurality of frames respectively arranged along the edges of the optical film layer;

[0006] At least one support bar is embedded in at least one of the plurality of frame strips, and the extension direction of the support bar is the same as the extension direction of the corresponding frame strip; the material strength of the support bar is greater than the material strength of the rubber frame body.

[0007] In some optional embodiments, the backlight module has a first side and a second side opposite to each other; a driving circuit board is disposed on the first side of the backlight module;

[0008] The support bar is embedded in a frame located at the first side of the backlight module.

[0009] In some optional embodiments, a mounting groove is provided in the frame connected to the support bar, and the shape of the inner wall of the mounting groove corresponds to the shape of the support bar, so as to accommodate the corresponding support bar;

[0010] A side of the mounting groove close to the back plate of the backlight module has an opening so that the supporting bar is exposed through the opening.

[0011] In some optional embodiments, the plurality of positioning holes are provided on a surface of the support bar on one side of the back plate facing the backlight module, and the plurality of positioning holes are exposed through at least one of the openings; and the plurality of positioning holes are evenly distributed along the extension direction of the support bar.

[0012] In some optional embodiments, the support bar is made of a conductive material; a portion of the surface of the support bar exposed through the opening is electrically connected to a designated circuit in the backlight module, so that the support bar serves as an auxiliary conductor.

[0013] In some optional embodiments, a mounting hole is provided in the support bar; a mounting protrusion is provided on the inner surface of the mounting groove, and the mounting protrusion corresponds to the position of the mounting through hole; the shape of the mounting protrusion is the same as the inner circumference shape of the mounting through hole, so as to cooperate and connect with the mounting through hole.

[0014] In some optional embodiments, the support bar is made of metal material; and the main body of the rubber frame is made of plastic material.

[0015] In some optional embodiments, the support bar is made of 304 stainless steel, 430 stainless steel or galvanized steel.

[0016] In some optional embodiments, each of the frame includes a frame main body and a plurality of convex portions; the plurality of convex portions are arranged on the surface of the corresponding frame main body;

[0017] The support strip is embedded in the corresponding frame body, and in a direction perpendicular to the extension of the support strip, the length of the cross section of the support strip is 1 / 3 to 2 / 3 of the length of the cross section of the corresponding frame body, and the width of the cross section of the support strip is 1 / 3 to 2 / 3 of the width of the cross section of the corresponding frame body.

[0018] As another technical solution, an embodiment of the present invention also provides a backlight module, which includes a back panel, a light panel, an optical film layer and a rubber frame as described above; wherein the light panel is stacked on one side surface of the back panel for emitting light; the optical film layer is stacked on one side surface of the light panel away from the back panel; and the rubber frame surrounds the outer peripheral side of the optical film layer.

[0019] As another technical solution, an embodiment of the present invention further provides a rubber frame mold, which is used to manufacture the rubber frame as described above by using an injection molding process; the rubber frame mold has a molding cavity corresponding to the shape of the rubber frame body, and the molding cavity is used to contain molten plastic material;

[0020] The rubber frame mold also has at least one bearing portion; the bearing portion is located inside the molding cavity and is arranged corresponding to at least one of the multiple frame strips; the bearing portion is used to bear the support strips.

[0021] In some optional embodiments, the bearing portion includes a bearing surface, and the bearing surface is formed on the bottom surface of the molding cavity.

[0022] In some optional embodiments, the plurality of positioning holes are opened on one side surface of the support bar, and the plurality of positioning holes are evenly distributed along the extension direction of the support bar;

[0023] The bearing part also includes a plurality of bearing columns arranged one by one corresponding to the plurality of positioning holes, and each of the plurality of bearing columns includes a connecting end and a bearing end; the connecting end of each of the bearing columns is fixedly connected to the bearing surface, and the bearing end of each of the bearing columns is used to cooperate and connect with the corresponding positioning hole.

[0024] As another technical solution, an embodiment of the present invention further provides a method for manufacturing a rubber frame, which is used to manufacture the rubber frame as described above; the method is characterized in that the method comprises the following steps:

[0025] Obtain the rubber frame mold as described above, and at least one support bar;

[0026] Placing the support bar on the bearing portion in the molding cavity of the rubber frame mold;

[0027] injecting molten plastic material into the molding cavity;

[0028] Curing the plastic material to form the plastic frame;

[0029] The rubber frame is separated from the rubber frame mold.

[0030] The present invention has the following beneficial effects:

[0031] The rubber frame provided in the embodiment of the present invention can improve the strength and deformation resistance of the rubber frame by embedding support bars with strength greater than the material strength of the rubber frame body inside the rubber frame body, thereby avoiding the problem of excessive deformation of the rubber frame due to insufficient strength of the rubber frame, and can also improve its supporting force for the backlight module, thereby reducing the risk of backlight module breakage.

[0032] The rubber frame mold and the method for manufacturing the rubber frame provided in the embodiments of the present invention first place the support bar on the bearing part at the specified position, and then form the rubber frame body by pouring molten plastic material to obtain a rubber frame structure with embedded support bars, thereby obtaining a rubber frame with high strength and deformation resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1It is a partial cross-sectional view of an existing edge-lit backlight module;

[0034] Figure 2 It is a partial cross-sectional view of an existing direct-type backlight module;

[0035] Figure 3 A schematic cross-sectional view of a plastic frame provided by an embodiment of the present invention;

[0036] Figure 4 A schematic diagram of viewing angles of existing display devices;

[0037] Figure 5 A schematic cross-sectional view of a frame provided by an embodiment of the present invention;

[0038] Figure 6 A front view of a frame with embedded support strips provided in an embodiment of the present invention;

[0039] Figure 7 A schematic cross-sectional view of a positioning hole of a support bar provided in an embodiment of the present invention;

[0040] Figure 8 Another schematic cross-sectional view of a support bar positioning hole provided in an embodiment of the present invention;

[0041] Fig. 9 A schematic cross-sectional view of a support bar installation through hole provided by an embodiment of the present invention;

[0042] Fig.10 Another cross-sectional schematic diagram of a plastic frame provided by an embodiment of the present invention;

[0043] Fig.11 A partial cross-sectional view of a backlight module provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0045] It should be understood that the specific embodiments and drawings described herein are only used to explain the present invention rather than to limit the present invention.

[0046] It can be understood that, in the absence of conflict, the various embodiments of the present invention and the various features therein can be combined with each other.

[0047] It can be understood that, for the convenience of description, the drawings of the present invention only show the parts related to the embodiments of the present invention, while the parts unrelated to the embodiments of the present invention are not shown in the drawings.

[0048] It can be understood that, in the absence of conflict, the functions and steps marked in the flowcharts and block diagrams of the embodiments of the present invention may occur in an order different from that marked in the drawings.

[0049] like Figure 1 As shown, the side-entry light panel includes a light strip (not shown in the figure), a light guide plate 01, a plurality of optical film layers 02 and a back plate 03. Among them, the light strip is arranged on the light incident side (side surface) of the light guide plate 01 and is used to emit light to the light guide plate 01, so as to use the light guide plate 01 to guide the side-incident light to be emitted from the light emitting surface (the surface facing the display panel) of the light guide plate 01. A plurality of optical film layers 02 are stacked on the light emitting surface of the light guide plate 01 to perform diffusion, uniform light and other treatments on the light emitted from the light emitting surface. The above-mentioned light guide plate 01 is stacked on the side surface of the back plate 03 close to the light emitting surface, and a plurality of optical film layers 02 are stacked in sequence on the side surface of the light guide plate 01 close to the light emitting surface. The light strip is fixed on the side surface of the light guide plate 01, that is, the back plate 03 is arranged on the side of the internal components of the backlight module away from the light emitting surface, so that the back plate 03 can be used to support the entire backlight module and encapsulate the back side. Specifically, Figure 1 As shown, there is a U-shaped bend 032 at the edge of the back panel 03, and the U-shaped bend 032 includes two parts, one perpendicular to the surface of the back panel body 031 and the other parallel to the surface of the back panel body 031. It can enclose a groove 0321 at the edge of the back panel 03 to accommodate the edge of the light strip and the light guide plate 01, so as to fix the light strip and avoid light leakage at the position of the light strip. Moreover, the U-shaped bend 032 can also be used as a reinforcing rib to strengthen the edge of the backlight module, thereby supporting the edge of the display device.

[0050] In contrast, Figure 2As shown, the existing direct-type backlight module usually includes a light board 001, multiple optical film layers 002 and a backboard 003. Among them, the light board 001 includes multiple light-emitting elements as the original light source; for example, the light board 001 has multiple light zones arranged in an array, each light zone includes at least one Mini-Led, and each light zone can be independently controlled, so that the pixels in the corresponding area of ​​the light zone can obtain accurate backlight brightness. The light board 001 and the multiple optical film layers 002 are stacked on the surface of the backboard 003 in sequence, and the edge of the backboard 003 has only a narrow bending structure 0032 perpendicular to the surface of the backboard body 0031. Furthermore, compared with the backboard with a U-shaped bending structure in the related art, the edge of the backboard 003 in the direct-type backlight module has lower strength. Therefore, it is also necessary to set a rubber frame 004 to support the edge of the backlight module, so as to protect the multiple optical film layers 002 and the light board and avoid light leakage. However, the rubber frame is usually made of organic plastic materials with good plasticity such as polypropylene, phenolic resin, polystyrene, etc., but these materials usually have low strength and poor bending resistance after molding; in addition, as narrow bezels and thin thickness gradually become the general technical requirements of display devices, the rubber frame is also usually designed to be a narrower and thinner structure; therefore, the strength of existing rubber frames is usually low, the bending resistance is poor, and it is easy to deform greatly when subjected to external force, so it is impossible to provide sufficient support for the edge of the backlight module, which leads to poor deformation resistance at the edge of the backlight module, and it is easy to deform too much when subjected to external force, resulting in light leakage, and may even cause damage to the light board.

[0051] Embodiment 1

[0052] like Figure 3 As shown, this embodiment provides a plastic frame of a backlight module, which includes a plastic frame body and at least one support bar 1. The plastic frame body surrounds the outer peripheral side of the optical film layer of the backlight module to provide support to the edge of the backlight module, and also has a light shielding effect. The plastic frame body includes a plurality of borders 2 respectively arranged along the edges of the optical film layer; specifically, a common backlight module is usually rectangular, and accordingly, the plastic frame body includes four borders 2.

[0053] The material strength of the support bar 1 is greater than the material strength of the rubber frame body, and at least one support bar 1 is embedded in at least one of the multiple frames 2, and the extension direction of the support bar 1 is the same as the extension direction of the corresponding frame 2, so as to support the corresponding frame 2 to improve the strength and deformation resistance of the rubber frame, thereby avoiding the problem of excessive deformation caused by insufficient strength of the rubber frame, and can improve its supporting force on the backlight module, thereby reducing the risk of fragmentation of the backlight module.

[0054] Specifically, the main material of the rubber frame is a plastic material that can be formed by an injection molding process. Specifically, the main material of the rubber frame is a thermoplastic plastic material such as polypropylene, phenolic resin, polystyrene, etc.

[0055] In some embodiments, the backlight module has a first side and a second side opposite to each other. Figure 4 As shown, since the liquid crystal panel arranged on the light-emitting side of the backlight module includes an array substrate and an opposing substrate arranged in a box, wherein the array substrate is usually slightly larger than the color film substrate, that is, the array substrate has an extra area relative to the color film substrate, and the area is configured to be connected to the driver circuit board (PCBA), and the area corresponds to the first side of the backlight module (i.e., the "DP side"). Since the first side of the backlight module only corresponds to the area with only the array substrate, the deformation resistance of this area is poor. Therefore, in order to ensure that the driver circuit board will not be damaged, it is necessary to provide a strong supporting force by the position of the frame 2 corresponding to the first side. Therefore, in this embodiment, the support bar 1 must be embedded in at least one frame 2 located at the first side of the backlight module to provide a strong supporting force, so that when the first side of the backlight module is subjected to external force, light leakage at the relatively weak first side of the backlight module is avoided, and damage to the driver circuit board can be avoided.

[0056] However, the support bar 1 is not limited to being embedded in the area corresponding to the first side of the frame 2, and the support bar 1 can also be embedded in multiple frames 2 other than the first side. In some preferred embodiments, the support bar 1 is embedded in all frames 2 to achieve overall reinforcement of the plastic frame, so that even if any edge of the backlight module is subjected to external force, light leakage is not likely to occur.

[0057] In some embodiments, Figure 5 As shown, a mounting groove 21 is provided in the frame 2 connected to the support bar 1, and the shape of the inner wall of the mounting groove 21 corresponds to the shape of the support bar 1, so as to accommodate the corresponding support bar 1, so as to embed the support bar 1 into the frame 2. Moreover, the side of the mounting groove 21 close to the back plate of the backlight module has at least one opening 211, so that the support bar 1 can be exposed through the opening 211; and since the opening 211 is arranged toward the inside of the backlight module, it will not affect the appearance of the frame 2, nor will it affect the overall size of the frame 2, and will not increase the space occupied by the frame 2, so there is no need to re-manufacture the mold for making the frame 2, but the existing mold can be directly used, and there is no need to adjust the size of other components in the backlight module, so that the existing materials can continue to be used for production.

[0058] In some specific embodiments, the number of the above-mentioned opening 211 is, for example, one, and the opening 211 is in the shape of a long strip; specifically, the long strip opening 211 can be the same shape as the surface of the support bar 1, so that the surface of the side of the support bar 1 facing the back plate is completely exposed, and the other five surfaces of the support bar 1 are covered. In other words, the depth of the mounting groove 21 can be the same as the thickness of the support bar 1 (the dimension in the direction perpendicular to the back plate surface), so that the surface of the side of the support bar 1 facing the back plate is flush with the surface of the frame 2.

[0059] Alternatively, in some other specific embodiments, the area of ​​the long strip opening 211 may be smaller than the area of ​​the surface of the support bar 1, so that one side surface of the support bar 1 is partially exposed. Specifically, the depth of the mounting groove 21 may be greater than the thickness of the support bar 1, and the edge of the side surface of the support bar 1 facing the back panel is also covered with plastic.

[0060] In some embodiments, Figure 6 As shown, the support bar 1 has a plurality of positioning holes 11. The plurality of positioning holes 11 are all formed on the surface of the support bar 1 facing the back plate and are evenly distributed along the extension direction of the support bar 1; Figure 7 As shown, the plurality of positioning holes 11 are, for example, through holes. The plurality of positioning holes 11 are exposed through at least one opening 211. The plurality of positioning holes 11 are used to cooperate and connect with the bearing parts in the injection mold during the injection molding process. Specifically, the plurality of bearing parts of the injection mold can be inserted into the plurality of positioning holes 11 to fix the support bar 1 at a specified position in the injection mold. Moreover, during the casting process, the bearing parts will isolate the inner circumference of the positioning holes 11 from the molten plastic material, and then, as shown in FIG. Figure 7 As shown, after molding and demoulding, the positioning hole 11 is not completely filled with the plastic material.

[0061] In some specific embodiments, such as Figure 6 As shown, when the number of the opening 211 is one, the plurality of positioning holes 11 are all exposed through one opening 211 .

[0062] In some other specific embodiments, such as Figure 8 As shown, when there are multiple openings 211, the multiple positioning holes 11 are arranged in one-to-one correspondence with the multiple openings 211 and can be exposed through the corresponding openings 211. Specifically, in this case, the bearing part in the mold is only connected to the multiple positioning holes 11 on the support bar 1, so during the injection molding process, the bearing part will only isolate the inner circumference of the positioning holes 11 from the molten plastic material, and the surface of the support bar 1 except the positioning holes 11 can contact with the molten plastic material, so that the openings 211 can be formed at the positions opposite to the positioning holes 11 after molding, so that the positioning holes 11 are exposed through the corresponding openings 211.

[0063] It should be noted that the shapes of the multiple positioning holes 11 are not limited, and they can be rectangular, circular or polygonal shapes. Moreover, the number, diameter and distribution of the above-mentioned positioning holes 11 on the support bar 1 are designed according to the frame length, product requirements and manufacturing capabilities. Taking the support bar 1 embedded in the DP side frame of the backlight module in a 16.0-inch display device as an example, the number of positioning holes 11 in the support bar 1 is, for example, 4, of which two positioning holes 11 are respectively located 10 mm away from the two ends of the support bar 1, and the remaining two positioning holes 11 are evenly distributed between the positioning holes 11 at the two ends; in this way, when the positioning holes 11 cooperate with the bearing part, it can ensure that the support bar 1 is fixed at the preset position during the injection molding process without displacement, thereby ensuring the smooth progress of the injection molding process and reducing the defective rate.

[0064] Furthermore, in some embodiments, the material of the support bar 1 is a conductive material; the surface of the support bar 1 exposed by the above-mentioned opening 211 is electrically connected to the designated circuit in the backlight module, so that the support bar 1 can be reused as an auxiliary wire; in this way, the wiring space inside the backlight module can be expanded, thereby reducing the wiring difficulty to a certain extent. Specifically, the designated circuit connected to the support bar 1 can depend on the circuit structure inside the backlight module. For example, the support bar 1 can be electrically connected to the power line to serve as an auxiliary power line; or, the support bar 1 can also be electrically connected to the control signal line to serve as an auxiliary signal line. Moreover, since the above-mentioned opening 211 is arranged toward the inside of the backlight module, the support bar 1 will not be exposed to the external environment, so that when the support bar 1 is used as an auxiliary wire, the problem of leakage or interference of electrical signals can be avoided.

[0065] In some embodiments, the support bar 1 is made of metal. Specifically, the support bar 1 is made of 304 stainless steel, 430 stainless steel or galvanized steel, for example. These metal materials have high strength and high resilience, and low density, so that the strength of the rubber frame can be improved while achieving lightweight rubber frame. Moreover, the support bar 1 can also be subjected to heat treatment processes such as quenching to improve strength.

[0066] In some embodiments, Fig. 9 As shown, a mounting hole 12 is also provided in the support bar 1; a mounting protrusion 22 (the portion circled by a dotted frame in the figure) is provided on the inner surface of the mounting groove 21, and the mounting protrusion 22 corresponds to the position of the mounting through hole 12; moreover, the shape of the mounting protrusion 22 is the same as the inner circumference shape of the mounting through hole 12, so as to cooperate and connect with the mounting through hole 12, thereby being connected and fixed to the support bar 1.

[0067] Specifically, the number, diameter and distribution of the above-mentioned mounting through holes 12 on the support bar 1 are designed according to the frame length, product requirements and manufacturing capabilities. Taking the support bar 1 embedded in the DP side frame of the backlight module in a 16.0-inch display device as an example, the number of mounting through holes 12 in the support bar 1 is, for example, 3, one of which is located at the center of the support bar 1, and the other two are located 10 mm away from both ends of the support bar 1, and all the mounting through holes 12 have a diameter of 1 mm; the mounting through holes 12 arranged in this way can ensure the stable connection between the support bar 1 and the DP side frame of the backlight module of the 16.0-inch display device, thereby ensuring that sufficient support force is provided to the frame to avoid light leakage.

[0068] It should be noted that when the above-mentioned rubber frame body is made by injection molding, the above-mentioned mounting protrusion 22 can be directly formed in the above-mentioned mounting through hole 12 during the injection molding process; specifically, during the pouring process, part of the molten plastic material will be directly filled into the mounting through hole 12, and after molding, a mounting protrusion consistent with the shape of the mounting through hole 12 will be formed, and since the molten plastic material will undergo slight deformation due to changes in its own material stress during the curing process, the mounting protrusion directly formed in the mounting through hole 12 can be tightly combined with the inner surface of the mounting through hole 12, thereby making the connection between the support bar 1 and the frame more stable.

[0069] In some embodiments, Fig.10 As shown, each frame includes a frame body 23 and a plurality of convex portions; the plurality of convex portions are arranged on the surface of the corresponding frame body. The support bar 1 is embedded in the corresponding frame body 23. Specifically, the frame body 23 is generally in the shape of a long strip.

[0070] Moreover, if Fig.10 As shown, in the direction perpendicular to the extension of the support bar 1, the length 1 of the cross section of the support bar 1 is 1 / 3 to 2 / 3 of the length L of the cross section of the corresponding frame main body, and the width h of the cross section of the support bar 1 is 1 / 3 to 2 / 3 of the width H of the cross section of the corresponding frame main body; within this size range, the support bar 1 can provide sufficient supporting force to ensure that the backlight module does not leak light and reduce the risk of breakage.

[0071] Moreover, the length of the support bar 1 should be determined according to the requirement for improving the frame strength, and the position of the support bar 1 in the frame should at least cover the area where the driver circuit board is located to reduce the risk of damage to the driver circuit board due to external force.

[0072] As another technical solution, this embodiment also provides a backlight module, specifically a Mini-Led backlight module. Fig.11As shown, the backlight module includes a back plate 3, an optical film layer 4, a light board 5 and a rubber frame as described above. The light board 5 is attached to one side surface of the back plate 3 through a rubber layer for emitting light to serve as a light source. The optical film layer 4 is stacked on the side surface of the light board 5 away from the back plate 3 for processing the light emitted by the light board 5. Specifically, the optical film layer 4 includes, for example, a light-transmitting film layer such as a uniform light film, a QD film and a BLT film. The rubber frame surrounds the outer peripheral side of the optical film layer 4 to protect the optical film layer and block light.

[0073] In some specific embodiments, such as Fig.10 and Fig.11 As shown, the plurality of convex portions on the frame at least include: a first convex portion 24, a second convex portion 25 and a third convex portion 26. The first convex portion 24 protrudes from the bottom surface of the frame body portion 23 and is located at the edge of one side of the frame body portion 23 away from the optical film layer 4, so that when the frame 2 is stacked on the back plate 3 of the backlight module, the side surface of the first convex portion 24, the bottom surface of the frame body portion 23 and the upper surface of the back plate 3 can form a receiving groove to accommodate the edge of the light board 5 stacked on the back plate 3. The second convex portion 25 protrudes from the top surface of the frame body portion 23 and is located at the edge of one side of the frame body portion 23 away from the optical film layer 4, so that when the edge of the diffuser 6 is overlapped on the top surface of the frame body portion 23, the upper surface of the diffuser 6 can be flush with the upper surface of the second convex portion 25, so that the liquid crystal panel can be evenly stacked on the diffuser 6 and the upper surface of the second convex portion 25, and the liquid crystal panel can have uniform support force everywhere. Moreover, the third protrusion 26 protrudes from the upper surface of the second protrusion 25 and the side surface away from the optical film layer 4, so that when the edge of the liquid crystal panel overlaps the upper surface of the second protrusion, the upper surface of the liquid crystal panel can be flush with the upper surface of the third protrusion to make the display surface flat.

[0074] like Fig.11 As shown, the back plate 3 has a bending structure 31 at the edge, and the bending structure 31 is arranged on the side of the frame body 23 away from the optical film layer 4 to block light leakage together with the frame 2, and can improve the strength of the backlight module edge. In some specific embodiments, the second protrusion 25 also protrudes from the side surface of the frame body 23 away from the optical film layer 4, and the lower surface of the third protrusion 26 also extends downward, so that the side surface of the frame body 23 away from the optical film layer 4, the lower surface of the second protrusion 25 and the side surface of the lower end of the third protrusion 26 close to the optical film layer 4 can enclose a receiving groove, so that the bending structure 31 of the back plate 3 can be inserted into the receiving groove, so that the frame 2 and the back plate 3 are buckled.

[0075] Specifically, the backlight module provided in this embodiment can be applied to products such as notebook display screens (NB), display panels (MNT), and mobile phone display screens.

[0076] As described above, the rubber frame provided in this embodiment can improve the strength and deformation resistance of the rubber frame by embedding a support bar whose strength is greater than the material strength of the rubber frame body inside the rubber frame body, thereby avoiding the problem of excessive deformation caused by insufficient strength of the rubber frame, and can improve its support force for the backlight module, thereby reducing the risk of fragmentation of the backlight module. Moreover, the support bar made of conductive material can also be electrically connected to a designated circuit inside the backlight module to add an auxiliary wire to the backlight module, thereby making the internal wiring layout of the backlight module more compact.

[0077] Embodiment 2

[0078] In order to manufacture the rubber frame described in the first embodiment, this embodiment provides a rubber frame mold, which is used to manufacture the above-mentioned rubber frame by injection molding. Specifically, the rubber frame mold has a molding cavity corresponding to the shape of the rubber frame body, and the molding cavity is used to contain molten plastic material.

[0079] The plastic frame mold also has at least one bearing portion. The bearing portion is located inside the molding cavity and is arranged corresponding to at least one of the multiple frames 2; the bearing portion is used to bear the support bar 1 to fix the support bar 1 at a designated position in the molding cavity. In this way, after the injection molding process is completed, the support bar 1 can be embedded at a designated position inside the main shape of the plastic frame.

[0080] Moreover, when the support bar 1 is provided with a mounting through hole 12, after the injection molding process is completed, the plastic material can be filled into the mounting through hole 12 and form the mounting protrusion 22 mentioned above, so that the support bar 1 is tightly connected to the plastic frame.

[0081] In some embodiments, the bearing portion includes a bearing surface, which is formed on the bottom surface of the molding cavity. The bearing surface can be used to abut against the surface of the support bar 1 to support the support bar 1. Since the bearing surface is always connected to the surface of the support bar 1 during the casting process, the supported portion of the support bar 1 will not be covered with plastic material after the plastic material is molded. In other words, the opening 211 described above will be formed at the position where the support bar 1 is supported.

[0082] Specifically, the shape of the bearing surface can be consistent with the shape of the side surface of the support bar 1 facing the back panel, so that the shape of the opening 211 formed after molding is consistent with the shape of the side surface of the support bar 1 facing the back panel. Alternatively, the shape of the bearing surface can also be consistent with the shape of the surface of the corresponding frame 2 facing the back panel, so that the shape of the opening 211 formed after molding is consistent with the shape of the side surface of the support bar 1 facing the back panel, and the side surface of the support bar 1 facing the back panel can be flush with the surface of the frame 2. Alternatively, the area of ​​the bearing surface can be smaller than the area of ​​the side surface of the support bar 1 facing the back panel, so that the area of ​​the opening 211 formed after molding is smaller than the area of ​​the side surface of the support bar 1 facing the back panel, so that the edge of the side surface of the support bar 1 facing the back panel is also covered with plastic.

[0083] Furthermore, in some embodiments, the bearing part further includes a plurality of bearing columns, and the plurality of bearing columns are arranged one by one corresponding to the plurality of positioning holes 11 in the support bar 1. The plurality of bearing columns each include a connecting end and a bearing end; the connecting end of each bearing column is fixedly connected to the bearing surface, and the bearing end of each bearing column is used to cooperate with and connect to the corresponding positioning hole 11, so as to stably fix the support bar 1 at a designated position.

[0084] Specifically, the height of the bearing column can be consistent with or less than the depth of the positioning hole 11, so that when the support bar 1 is placed on the bearing portion, the bearing surface is against the side surface of the support bar 1, and the bearing column is connected with the positioning hole 11, so that during the casting process, the side surface of the support bar 1 and the inner peripheral surface of the positioning hole 11 are isolated from the molten plastic material, and then after molding and demolding, the surface of the support bar 1 and the multiple positioning holes 11 can be exposed through an opening 211. Alternatively, the height of the bearing column can be much greater than the depth of the positioning hole 11, and after the bearing end of the bearing column is connected with the positioning hole 11, the surface of the support bar 1 will not contact the bearing surface, so as to achieve multi-point support of the support bar 1, and, similar to the previous embodiment, the multiple supported positions of the support bar 1 will not be covered with plastic material, so that the multiple openings 211 formed at the positions opposite to the positioning holes 11 on the surface of the frame 2 described above can be formed, so that the positioning holes 11 are exposed through the corresponding openings 211.

[0085] As another technical solution, this embodiment also provides a method for manufacturing a rubber frame, which is used to manufacture the rubber frame described in Embodiment 1. The manufacturing method comprises the following steps:

[0086] Step S1: obtaining the above-mentioned plastic frame mold and at least one supporting bar;

[0087] Step S2: placing the support bar on the bearing portion in the molding cavity of the rubber frame mold;

[0088] Step S3: injecting molten plastic material into the molding cavity;

[0089] Step S4: curing the plastic material to form a plastic frame;

[0090] Step S5: Separate the rubber frame from the rubber frame mold to complete the rubber frame manufacturing.

[0091] In some embodiments, before the above step S1, a step of making a support bar is also included. Specifically, the step of making a support bar includes: forming a support bar body by a casting process or a cutting process, and then slotting and / or punching the support bar body.

[0092] As described above, the rubber frame mold and the method for manufacturing the rubber frame provided in this embodiment are to first place the support bar on the bearing part at the specified position, and then form the rubber frame body by pouring molten plastic material to obtain a rubber frame structure with embedded support bar, thereby obtaining a rubber frame with high strength and deformation resistance.

[0093] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A plastic frame of a backlight module, characterized in that: The plastic frame comprises: A plastic frame body, surrounding the outer peripheral side of the optical film layer of the backlight module; the plastic frame body comprises a plurality of frames respectively arranged along the edges of the optical film layer; At least one support bar is embedded in at least one of the plurality of frame strips, and the extension direction of the support bar is the same as the extension direction of the corresponding frame strip; the material strength of the support bar is greater than the material strength of the rubber frame body.

2. The plastic frame according to claim 1, characterized in that: The backlight module has a first side and a second side opposite to each other; a driving circuit board is arranged on the first side of the backlight module; The support bar is embedded in a frame located at the first side of the backlight module.

3. The plastic frame according to claim 1, characterized in that: The frame connected to the support bar is provided with a mounting groove, the inner wall shape of the mounting groove corresponds to the shape of the support bar, and is used to accommodate the corresponding support bar; A side of the mounting groove close to the back plate of the backlight module has at least one opening, so that the supporting bar is exposed through the opening.

4. The plastic frame according to claim 3, characterized in that: A plurality of positioning holes are formed on a surface of a side of the back plate of the support bar facing the backlight module, and the plurality of positioning holes are exposed through at least one of the openings; The plurality of positioning holes are evenly distributed along the extension direction of the support bar.

5. The plastic frame according to claim 3 or 4, characterized in that: The support bar is made of a conductive material; a portion of the surface of the support bar exposed through the opening is electrically connected to a designated circuit in the backlight module, so that the support bar serves as an auxiliary wire.

6. The plastic frame according to claim 3, characterized in that: A mounting through hole is provided in the support bar; a mounting protrusion is provided on the inner surface of the mounting groove, and the mounting protrusion corresponds to the position of the mounting through hole; the shape of the mounting protrusion is the same as the inner circumference shape of the mounting through hole, so as to cooperate and connect with the mounting through hole.

7. The plastic frame according to claim 1, characterized in that: The support bar is made of metal.

8. The plastic frame according to claim 7, characterized in that: The support bar is made of 304 stainless steel, 430 stainless steel or galvanized steel.

9. The plastic frame according to claim 1, characterized in that: Each of the frame comprises a frame main body and a plurality of convex parts; the plurality of convex parts are arranged on the surface of the corresponding frame main body; The support strip is embedded in the corresponding frame body, and in a direction perpendicular to the extension of the support strip, the length of the cross section of the support strip is 1 / 3 to 2 / 3 of the length of the cross section of the corresponding frame body, and the width of the cross section of the support strip is 1 / 3 to 2 / 3 of the width of the cross section of the corresponding frame body.

10. A backlight module, characterized in that: It comprises a back panel, a light panel, an optical film layer and a rubber frame as described in any one of claims 1 to 9; wherein the light panel is stacked on one side surface of the back panel for emitting light; the optical film layer is stacked on one side surface of the light panel away from the back panel; and the rubber frame surrounds the outer peripheral side of the optical film layer.

11. A plastic frame mold, characterized in that: Used to manufacture the rubber frame according to any one of claims 1 to 9 by injection molding process; the rubber frame mold has a molding cavity corresponding to the shape of the rubber frame body inside, and the molding cavity is used to contain molten plastic material; The rubber frame mold also has at least one bearing portion; the bearing portion is located at the bottom of the molding cavity and is arranged corresponding to at least one of the multiple frame strips; the bearing portion is used to bear the support strip.

12. The plastic frame mold according to claim 11, characterized in that: The bearing portion includes a bearing surface, and the bearing surface is formed on the bottom surface of the molding cavity.

13. The plastic frame mold according to claim 12, characterized in that: A plurality of positioning holes are provided on one side surface of the support bar, and the plurality of positioning holes are evenly distributed along the extension direction of the support bar; The bearing part also includes a plurality of bearing columns arranged one by one corresponding to the plurality of positioning holes, and each of the plurality of bearing columns includes a connecting end and a bearing end; the connecting end of each of the bearing columns is fixedly connected to the bearing surface, and the bearing end of each of the bearing columns is used to cooperate and connect with the corresponding positioning hole.

14. A method for manufacturing a rubber frame, used for manufacturing the rubber frame according to any one of claims 1 to 9; characterized in that: The following steps are involved: Obtain a rubber frame mold as described in any one of claims 11 to 13, and at least one support bar; Placing the support bar on the bearing portion in the molding cavity of the rubber frame mold; injecting molten plastic material into the molding cavity; Curing the plastic material to form the plastic frame; The rubber frame is separated from the rubber frame mold.

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