Supporting assembly, light bar and backlight module

Abstract

The embodiment of the utility model discloses a supporting assembly, a light bar and a backlight module, and relates to but is not limited to the technical field of display. The support assembly includes a first support arm and at least one second support arm. The first supporting arm is arranged between the diffusion plate and the back plate and is bent along the first plane in the process that the diffusion plate and the back plate get close to each other. One end of the second supporting arm is arranged on the back plate, and the other end of the second supporting arm and the diffusion plate are arranged at intervals. In this way, the first supporting arm can be arranged to be of a thin and narrow structure, light shielding is reduced, shadows are relieved, and backlight uniformity is improved. The second supporting arm can support the diffusion plate above the bending point of the first supporting arm, plastic deformation caused by further bending of the first supporting arm is avoided, the overall strength of the supporting assembly is further improved, in the normal use process, the second supporting arm and the diffusion plate are arranged at an interval, shadows generated when the second supporting arm shields light can be relieved, and the service life of the supporting assembly is prolonged. And the shadow is further reduced.

Description

TECHNICAL FIELD

[0001] The embodiment of the present disclosure relates to, but is not limited to, the technical field of display, and more particularly, to a support assembly, a light bar and a backlight module. BACKGROUND

[0002] In the television (TV) industry, a backlight module is one of the key components of a liquid crystal display device, and a support assembly is an important structural component in the backlight module. With the increasingly high requirements of customers on the picture quality, higher requirements are put forward for the performance and design of the support assembly. CONTENT OF THE UTILITY MODEL

[0003] The embodiment of the present disclosure provides a support assembly arranged between a diffusion plate and a back plate to form a cavity between the diffusion plate and the back plate, the support assembly comprising:

[0004] a first support arm arranged between the diffusion plate and the back plate, the first support arm being elastically bendable; and

[0005] at least one second support arm arranged spaced apart from the first support arm, one end of the second support arm being arranged on the back plate, and the other end of the second support arm being arranged spaced apart from the diffusion plate.

[0006] In some embodiments of the support assembly, the first support arm is in a flat shape.

[0007] The second support arm is in a flat shape and coplanar with the first support arm.

[0008] In some embodiments of the support assembly, one of two sides of the second support arm opposite in a thickness direction of the second support arm is provided with a protruding portion.

[0009] In some embodiments of the support assembly, the protruding portion is arranged on a symmetry plane of the second support arm, the protruding portion being symmetrically arranged about the symmetry plane and extending along the symmetry plane, one end of the protruding portion being arranged on the back plate, and the other end of the protruding portion being arranged spaced apart from the diffusion plate.

[0010] In some embodiments of the support assembly, one end of the first support arm facing the diffusion plate has a first circular arc surface, the first circular arc surface being convex to the diffusion plate.

[0011] In some embodiments of the support assembly, one end of the second support arm facing the diffusion plate has a second circular arc surface, the second circular arc surface being convex to the diffusion plate.

[0012] In some embodiments of the support assembly, the number of the second support arms is two, and the second support arms are symmetrically arranged on two sides of the first support arm in a width direction of the first support arm.

[0013] In some embodiments of the support assembly, the support assembly further comprises a base, and the first support arm, the second support arm and the protrusion are disposed on the base and disposed on the back plate through the base.

[0014] In some embodiments of the support assembly, the height of the first support arm is 30.5mm to 32.5mm, wherein the height of the first support arm is a dimension of the first support arm in a direction perpendicular to the back plate;

[0015] The width of the first support arm is 4mm to 5mm;

[0016] The thickness of the first support arm is 0.6mm to 0.8mm.

[0017] In some embodiments of the support assembly, the height of the second support arm is greater than R1, wherein the height of the second support arm is a dimension of the second support arm in a direction perpendicular to the back plate, and R1 is a bending radius of the first support arm facing the bending side when the first support arm is broken in the bending state, and R1 is calculated by the following formula:

[0018] L1=2*3.14*R1, wherein L1 is a circumference of the first support arm facing the bending side when the first support arm is broken in the bending state;

[0019] △h=2*3.14*t1*h1 / L1, wherein △h is a difference value between the circumference of the first support arm facing the bending side when the first support arm is broken in the bending state and the height of the first support arm;

[0020] e=△h / h1, wherein e is an elongation at break of the first support arm.

[0021] In some embodiments of the support assembly, the width of the second support arm is 5mm to 8mm;

[0022] The thickness of the second support arm is 0.9mm to 1.1mm.

[0023] In some embodiments of the support assembly, the height of the protrusion is less than the height of the second support arm, and the difference between the height of the protrusion and the height of the second support arm is 3.9mm to 4.1mm, wherein the height of the second support arm is a dimension of the second support arm in a direction perpendicular to the back plate, and the height of the protrusion is a dimension of the protrusion in a direction perpendicular to the back plate.

[0024] In some embodiments of the support assembly, the width of the protrusion is 0.9mm to 1.1mm;

[0025] The thickness of the protrusion is 0.9mm to 1.1mm.

[0026] In some embodiments of the support assembly, the interval distance between the first support arm and the second support arm is 0.9mm to 1.1mm.

[0027] The present disclosure also discloses a lamp strip comprising:

[0028] a body;

[0029] a plurality of light source assemblies arranged at intervals in the body; and

[0030] a plurality of support assemblies as described above, which are integrated with the body and arranged at intervals with the light source assemblies.

[0031] The present disclosure also discloses a backlight module comprising a film, a diffusion plate and a back plate arranged in sequence;

[0032] The diffusion plate and the back plate form a cavity therebetween;

[0033] The backlight module further comprises a reflective sheet and a plurality of lamp strips as described above, the plurality of lamp strips are accommodated in the cavity and arranged on the back plate, the plurality of lamp strips are electrically connected through a lamp strip line, and the reflective sheet is accommodated in the cavity and covers the lamp strips and the side of the lamp strip line away from the back plate;

[0034] The reflective sheet is provided with a first avoiding hole and a second avoiding hole for avoiding the light source assemblies and the support assemblies;

[0035] The light source assemblies are exposed to the reflective sheet through the first avoiding hole;

[0036] The support assemblies are exposed to the reflective sheet through the second avoiding hole.

[0037] The implementation of the present disclosure will have the following beneficial effects:

[0038] The support assembly of the above-mentioned scheme is applied to the light bar and the backlight module. In addition to having better support performance, the support assembly can separate the intensity and shadow functions, ensure that the shadow is further reduced, and enhance the bending resistance of the support assembly. Specifically, the support assembly includes a first support arm and at least one second support arm. The first support arm is arranged between the diffusion plate and the back plate, and the first support arm can be elastically bent. One end of the second support arm is arranged on the back plate, and the other end of the second support arm is arranged in a spaced manner with the diffusion plate. In this way, the first support arm can be arranged in a thinner and narrower structure, reducing the light blocking, reducing the shadow, and improving the backlight uniformity. The second support arm can support the diffusion plate above the bending point of the first support arm, avoiding the first support arm from further bending and causing plastic deformation, thereby improving the overall strength of the support assembly. In the normal use process, the second support arm is arranged in a spaced manner with the diffusion plate, which can reduce the shadow caused by the light blocking of the second support arm, and ensure that the shadow is further reduced. Thus, the strength of the support assembly is enhanced and the shadow is reduced. The first support arm and the second support arm are arranged in a spaced manner, so that the first support arm and the second support arm are separated in structure and do not interfere with each other in deformation and support.

[0039] Other features and advantages of the present disclosure will be set forth in the following description, and in part will become apparent from the description, or can be learned by practice of the present disclosure. The objects and other advantages of the present disclosure can be achieved and obtained by the structures specifically pointed out in the description and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0040] The accompanying drawings are intended to provide a further understanding of the technical solutions of the present disclosure and constitute a part of the specification, and are used together with the embodiments of the present disclosure to explain the technical solutions of the present disclosure, and do not constitute a limitation on the technical solutions of the present disclosure.

[0041] Figure 1 It is a front view of the support assembly in the backlight module in the embodiment of the present disclosure;

[0042] Figure 2 It is a side view of the support assembly in the backlight module in the embodiment of the present disclosure;

[0043] Figure 3 It is an axial view of the support assembly in the backlight module in the embodiment of the present disclosure;

[0044] Figure 4 It is a top view of the support assembly in the backlight module in the embodiment of the present disclosure;

[0045] Figure 5 It is a bottom view of the support assembly in the backlight module in the embodiment of the present disclosure;

[0046] Figure 6 It is Figure 1Schematic view of the first support arm in the support assembly being bent;

[0047] Figure 7 Schematic view of the first support arm in the support assembly being bent; Figure 6 Schematic view of the first support arm in the support assembly being bent;

[0048] Figure 8 Schematic view of the first support arm in the support assembly being bent; Figure 1 Schematic view of the first support arm in the support assembly being bent;

[0049] Figure 9 Schematic view of the first support arm in the support assembly being bent;

[0050] Figure 10 Schematic view of the first support arm in the support assembly being bent; Figure 9 Schematic view of the first support arm in the support assembly being bent;

[0051] Figure 11 Schematic view of the first support arm in the support assembly being bent; Figure 9 Schematic view of the first support arm in the support assembly being bent;

[0052] Figure 12 Schematic view of the first support arm in the support assembly being bent; Figure 9 Schematic view of the first support arm in the support assembly being bent;

[0053] Figure 13 Schematic view of the first support arm in the support assembly being bent; Figure 9 Schematic view of the first support arm in the support assembly being bent;

[0054] Figure 14 Schematic view of the first support arm in the support assembly being bent; Figure 9 Schematic view of the first support arm in the support assembly being bent;

[0055] Figure 15 Schematic view of the first support arm in the support assembly being bent; Figure 9 Schematic view of the first support arm in the support assembly being bent;

[0056] Figure 16 Schematic view of the first support arm in the support assembly being bent; Figure 9 Schematic view of the first support arm in the support assembly being bent;

[0057] Figure 17 Schematic view of the first support arm in the support assembly being bent;

[0058] Figure 18 Schematic view of the first support arm in the support assembly being bent;

[0059] Explanation of the reference signs:

[0060] 10. Diaphragm; 11. Connecting protrusion; 20. Diffuser plate; 21. Limiting part; 30. Back plate; 31. Bottom; 311. LED strip positioning structure; 312. Circumferential wall; 32. First inclined part; 40. LED strip; 41. Body; 411. Connector; 42. Light source assembly; 421. LED chip; 422. Lens; 43. Support assembly; 431. First support arm; 4311. First arc surface; 432. Second support arm; 4321. Second arc surface; 433. Protrusion; 434. Base; 4341. Connecting part; 50. Reflector; 51. Bottom surface; 52. Second inclined part; 53. Second positioning part; 60. LED strip line; 100. Cavity; 200. Installation space; 300. First clearance hole; 400. Second clearance hole; 500. Matting hole. Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in this disclosure can be arbitrarily combined with each other.

[0062] Currently, the support components mainly affect two aspects of the backlight module: first, the support strength: the thicker and wider the support body of the support component, the more rigid it is, the better the support is, and the less likely it is to bend; second, the shadows on the screen: the thinner and narrower the support body of the support component, the more transparent it is, and the less the support body blocks light, the better the shadows.

[0063] In summary, there is a contradictory relationship between intensity and shadow. As clients demand higher image quality, their tolerance for shadows created by support components decreases, leading to thinner and narrower support components to reduce light obstruction by the material itself (polycarbonate (PC): 90% transmittance). However, this manufacturing and usage process introduces the problem of support components being prone to bending, especially when the support components are relatively tall, where the bending issue becomes more pronounced.

[0064] This disclosure provides a backlight module, which can be a direct-lit backlight module. For example... Figures 9 to 17 As shown, the backlight module provided in the embodiments of this disclosure will now be described. The backlight module includes a diaphragm 10, a diffuser plate 20, and a back plate 30 arranged sequentially. A cavity 100 is formed between the diffuser plate 20 and the back plate 30.

[0065] In the embodiments of the present disclosure, the back plate 30 can be punched from a hot-dip galvanized steel sheet (SGCC) or an electro-galvanized steel sheet (SECC). The back plate 30 includes a bottom 31 and four first inclined portions 32 arranged around the periphery of the bottom 31. The four first inclined portions 32 are each inclined from the bottom 31 to one side of the diffusion plate 20, so that the back plate 30 as a whole can have a pelvic cavity structure. The bottom 31 is provided with a lamp strip positioning structure 311 and a circumferential wall 312. The lamp strip positioning structure 311 can be a protrusion or have a groove structure, so as to be fixedly connected with the lamp strip 40. The number of the lamp strip positioning structure 311 can be multiple, so as to improve the connection stability between the back plate 30 and the lamp strip 40. The circumferential wall 312 can form an installation space 200 together with the bottom 31. The installation space 200 has a space for installing structures such as a power board and a main board.

[0066] The backlight module further includes a reflective sheet 50 and a plurality of lamp strips 40. The plurality of lamp strips 40 are accommodated in the cavity 100 and arranged on the back plate 30. The plurality of lamp strips 40 are electrically connected through a lamp strip wire 60. The lamp strip 40 includes a body 41, a plurality of light source assemblies 42, and a plurality of support assemblies 43. The body 41 can be a printed circuit board (PCB). For example, the body 41 can be a copper-clad aluminum substrate printed circuit board. The body 41 is provided with a first positioning portion matched with the lamp strip positioning structure 311. The first positioning portion can have a first positioning hole matched with the protrusion or a positioning protrusion matched with the groove structure. The first positioning portion is installed on the lamp strip positioning structure 311 and integrated through room-temperature curing silicone. The light source assembly 42 can provide backlight. The light source assembly 42 includes an LED chip 421 and a lens 422. The LED chip 421 is soldered on the body 41. The lens 422 is coaxially arranged with the LED chip 421 and fixed on the body 41 through UV (ultraviolet) glue. The body 41 is further provided with a connector 411, so as to be electrically connected with the lamp strip wire 60. The lamp strip wire 60 can be electrically connected with the power board after being connected in series with the plurality of lamp strips 40, so as to supply power to the lamp strips 40. The lamp strip wire 60 can be an electronic wire harness with a circular cross section, including a positive wire and a negative wire.

[0067] The material of the support assembly 43 can be polycarbonate (PC) and the transmittance thereof is about 90%. The support assembly 43 is supported between the diffusion plate 20 and the back plate 30, so that the structure of the cavity 100 is stable, an air cavity with a fixed depth is formed, and the light can be mixed uniformly. The height of the support assembly 43 is greater than or equal to the depth of the cavity 100. Alternatively, the height of the support assembly 43 is less than or equal to the depth of the cavity 100.

[0068] A plurality of light source assemblies 42 are arranged at intervals on the body 41 to improve the uniformity of the backlight. The support assembly 43 is integrated with the body 41, which greatly reduces the manufacturing cost. The support assembly 43 and the body 41 can be assembled by a surface mount technology (SMT) and bonded by a UV adhesive, which integrates the materials and eliminates the process of processing the support assembly 43, thereby greatly improving the production capacity (UPH) of the production line. The support assembly 43 and the light source assembly 42 are arranged at intervals to reduce the blocking of light.

[0069] The reflective sheet 50 is accommodated in the cavity 100 and covers the side of the light bar 40 and the light bar line 60 away from the back plate 30. The reflective sheet 50 can be made of polyethylene terephthalate (PET) foam and can be white with a reflectivity of about 96%. The reflective sheet 50 includes a bottom surface 51 matched with the bottom 31 and four second inclined portions 52 arranged around the bottom surface 51. The four second inclined portions 52 are inclined from the bottom surface 51 to the side of the diffusion plate 20 and correspond to the four first inclined portions 32 one by one. The reflective sheet 50 is entirely laid on the back plate 30 and plays a reflecting role to improve the utilization rate of the light emitted by the LED chip 421.

[0070] The reflective sheet 50 is provided with first and second avoiding holes 300 and 400 for avoiding the light source assembly 42 and the support assembly 43.

[0071] The light source assembly 42 is exposed to the reflective sheet 50 through the first avoiding hole 300. The reflective sheet 50 is arranged at intervals with the light source assembly 42, and the interval can be about 1-2 mm. The support assembly 43 is exposed to the reflective sheet 50 through the second avoiding hole 400. The reflective sheet 50 is arranged at intervals with the support assembly 43, and the interval can be about 1-2 mm.

[0072] As shown in Figure 15 The reflective sheet 50 is also provided with a second positioning portion 53, which can have a second positioning hole matched with a protrusion or a positioning protrusion matched with a groove structure to be positioned and connected with the back plate 30. Double-sided adhesive is also bonded between the reflective sheet 50 and the back plate 30.

[0073] The second inclined portion 52 is provided with a light extinction hole 500, which can eliminate excessive light and reduce the local reflectivity, thereby reducing the bright bands on the four edges of the backlight module. The light extinction hole 500 can have a regular shape such as a triangle, a rectangle, a trapezoid, a circle or an ellipse, or an irregular shape.

[0074] The diffusion plate 20 is connected with the four first inclined portions 32 and forms the cavity 100 together with the back plate 30. The diffusion plate 20 can uniformly diffuse light and support the soft diaphragm 10. The thickness of the diffusion plate 20 can be about 1.2 mm, wherein the thickness of the diffusion plate 20 refers to the dimension of the diffusion plate 20 in the direction perpendicular to the back plate 30. The diffusion plate 20 can be a polystyrene (PS) plate and can be white in color. As shown in Figure 10 The diffusion plate 20 is connected with the four first inclined portions 32 and forms the cavity 100 together with the back plate 30. The diffusion plate 20 can uniformly diffuse light and support the soft diaphragm 10. The thickness of the diffusion plate 20 can be about 1.2 mm, wherein the thickness of the diffusion plate 20 refers to the dimension of the diffusion plate 20 in the direction perpendicular to the back plate 30. The diffusion plate 20 can be a polystyrene (PS) plate and can be white in color. As shown in

[0075] The diaphragm 10 can again uniformly diffuse light and improve brightness. The diaphragm 10 is arranged on the side of the diffusion plate 20 away from the back plate 30 and can be bonded to the diffusion plate 20 by double-sided tape. The double-sided tape is arranged on the periphery of the diaphragm 10 to avoid blocking light. The width of the double-sided tape can be about 3 mm. The width of the double-sided tape refers to the minimum dimension of the double-sided tape in the direction parallel to the back plate 30. The thickness of the diaphragm 10 can be about 0.31 mm, wherein the thickness of the diaphragm 10 refers to the dimension of the diaphragm 10 in the direction perpendicular to the back plate 30. As shown in Figure 9 The diaphragm 10 can again uniformly diffuse light and improve brightness. The diaphragm 10 is arranged on the side of the diffusion plate 20 away from the back plate 30 and can be bonded to the diffusion plate 20 by double-sided tape. The double-sided tape is arranged on the periphery of the diaphragm 10 to avoid blocking light. The width of the double-sided tape can be about 3 mm. The width of the double-sided tape refers to the minimum dimension of the double-sided tape in the direction parallel to the back plate 30. The thickness of the diaphragm 10 can be about 0.31 mm, wherein the thickness of the diaphragm 10 refers to the dimension of the diaphragm 10 in the direction perpendicular to the back plate 30. As shown in

[0076] Please refer to Figures 1 to 4 and Figure 8 The support assembly 43 includes a first support arm 431 and at least one second support arm 432. The first support arm 431 is arranged between the diffusion plate 20 and the back plate 30 and can be elastically bent. For example, the first support arm 431 can be bent along the first plane during the approach of the diffusion plate 20 and the back plate 30 to each other. The at least one second support arm 432 is arranged in a spaced manner with the first support arm 431, one end of the second support arm 432 is arranged on the back plate 30, and the other end of the second support arm 432 is arranged in a spaced manner with the diffusion plate 20.

[0077] In summary, the implementation of the embodiments of the present disclosure will have the following beneficial effects:

[0078] The support assembly 43 of the above scheme is applied to the light bar 40 and the backlight module, in addition to having better support performance, it can also realize the separation of intensity and shadow function, ensure that the shadow is further reduced, and enhance the bending resistance of the support assembly 43. Specifically, the support assembly 43 includes a first support arm 431 and at least one second support arm 432. The first support arm 431 is arranged between the diffusion plate 20 and the back plate 30, and the first support arm 431 can be elastically bent. One end of the second support arm 432 is arranged on the back plate 30, and the other end of the second support arm 432 is arranged in a spaced manner with the diffusion plate 20. In this way, the first support arm 431 can be arranged in a thinner and narrower structure, reducing the blocking of light, reducing the shadow, and improving the uniformity of backlight. The second support arm 432 can be supported on the diffusion plate 20 above the bending point of the first support arm 431, avoiding further bending of the first support arm 431 to cause plastic deformation, thereby improving the overall strength of the support assembly 43. In the normal use process, the second support arm 432 is arranged in a spaced manner with the diffusion plate 20, which can reduce the shadow caused by the blocking of light by the second support arm 432, and ensure that the shadow is further reduced. Thus, the strength of the support assembly 43 is enhanced and the shadow is reduced. The first support arm 431 and the second support arm 432 are arranged in a spaced manner, so that the first support arm 431 and the second support arm 432 are separated in structure and do not interfere with each other's deformation and support.

[0079] In an exemplary embodiment, please combine Figures 1 to 3 , Figure 6 and Figure 8 , the first support arm 431 is flat, so that the first support arm 431 is more easily bent in a certain direction (for example, along the first plane), ensuring the accuracy of the bending direction of the first support arm 431. The second support arm 432 is flat and coplanar with the first support arm 431. In this way, it can be ensured that the first support arm 431 and the second support arm 432 have the same force direction on the diffusion plate 20, avoiding tearing the diffusion plate 20. Moreover, the first support arm 431 and the second support arm 432 are both flat, which can ensure the structural strength while the narrower side of the first support arm 431 and the second support arm 432 can face the light source assembly 42, thereby reducing the blocking of light by the support assembly 43 and further reducing the shadow. The first support arm 431 can provide a first level of support to the diffusion plate 20, and the thinner and narrower first support arm 431 can reduce the blocking of light, reduce the shadow, and improve the uniformity of backlight.

[0080] In an exemplary embodiment, please combine Figures 2 to 4The second supporting arm 432 is provided with a protruding part 433 on one side of the second supporting arm 432 along the thickness direction of the second supporting arm 432. The size of the second supporting arm 432 along the thickness direction is increased by the protruding part 433, and the structural strength of the second supporting arm 432 is improved, so that the second supporting arm 432 is not easily bent when subjected to a larger impact. The second supporting arm 432 can play a secondary supporting role on the diffusion plate 20. The second supporting arm 432 can be thicker and wider and provided with the protruding part 433, so that the second supporting arm 432 cannot be deformed even when subjected to a larger impact, and is the end point of the deformation of the diffusion plate 20. For example, when assembling the power supply plate, the rear shell and the like on the production line, the screws are locked with force, at which time the backlight module is subjected to a pressing force, the back plate 30 is deformed inwardly, the cavity 100 is compressed, and the supporting assembly 43 is deformed. When the first supporting arm 431 is pressed by the diffusion plate 20 and the diffusion plate 20 presses the second supporting arm 432, the diffusion plate 20 cannot continue to approach the back plate 30 because of the great structural strength of the second supporting arm 432, and the cavity 100 stops being compressed. When the pressing force disappears, the first supporting arm 431 restores to the original state due to its elasticity.

[0081] The protruding part 433 is arranged on one side of the second supporting arm 432, which can reduce the structural complexity of the second supporting arm 432 and the protruding part 433 as a whole, and avoid generating a larger shadow.

[0082] In the exemplary embodiments, please refer to Figure 2 and Figure 4 The protruding part 433 is arranged on the symmetry plane of the second supporting arm 432, the protruding part 433 is symmetrically arranged about the symmetry plane and extends along the symmetry plane, one end of the protruding part 433 is arranged on the back plate 30, and the other end of the protruding part 433 is arranged in a spaced manner from the diffusion plate 20. In this way, the strength of the second supporting arm 432 is improved more uniformly, and the one end of the protruding part 433 is connected to the back plate 30, which can further improve the structural strength of the second supporting arm 432.

[0083] In the exemplary embodiments, please refer to Figure 1 , Figure 3 and Figure 12 The first supporting arm 431 has a first circular arc surface 4311 at the end facing the diffusion plate 20, and the first circular arc surface 4311 protrudes towards the diffusion plate 20. The first circular arc surface 4311 can form a smooth vertex, which facilitates the sliding of the first circular arc surface 4311 relative to the diffusion plate 20, and makes the bending deformation of the first supporting arm 431 more smooth.

[0084] In the exemplary embodiments, please refer to Figure 1 , Figure 3 and Figure 12The second support arm 432 has a second arc surface 4321 at one end facing the diffusion plate 20, and the second arc surface 4321 protrudes towards the diffusion plate 20. The second arc surface 4321 can form a smooth vertex, and when the diffusion plate 20 is subjected to a tangential force, the second arc surface 4321 can slide relative to the diffusion plate 20, avoiding stress concentration and causing the diffusion plate 20 to break.

[0085] In the exemplary embodiments, please refer to Figure 1 , Figure 3 , Figure 4 and Figure 12 , the number of the second support arm 432 is two, and the second support arm 432 is symmetrically arranged on both sides of the first support arm 431 along the width direction of the first support arm 431. In this way, the force acting on the diffusion plate 20 can be balanced when the diffusion plate 20 is pressed to contact the second support arm 432, avoiding deflection of the diffusion plate 20 and causing tearing between the diffusion plate 20 and the back plate 30.

[0086] In the exemplary embodiments, please refer to Figures 1 to 6 , Figure 8 and Figure 12 , the support assembly 43 further comprises a base 434, and the first support arm 431, the second support arm 432 and the protruding part 433 are arranged on the base 434 and arranged on the back plate 30 through the base 434. In this way, the first support arm 431 and the second support arm 432 can be connected as a whole through the arrangement of the base 434, and the connection area between the second support arm 432 and the base 434 can be increased through the protruding part 433 to improve the connection stability. The arrangement of the base 434 also facilitates the installation of the first support arm 431, the second support arm 432 and the protruding part 433 on the back plate 30, reduces the number of parts, and improves the assembly efficiency. In the embodiments of the present disclosure, the base 434 is connected with the body 41 as a whole, so that the support assembly 43 can be integrated with the light bar 40 as a whole, further improving the assembly efficiency. The base 434 is provided with a connecting part 4341, which facilitates the connection of the base 434 and the body 41. One of the connecting part 4341 and the body 41 is a protruding structure, and the other has a groove structure matched with the protruding structure. The protruding structure can be installed in the groove structure to connect the base 434 and the body 41. The number of the connecting part 4341 is four, which is uniformly distributed on the base 434. The base 434 and the body 41 can also be further improved in connection stability by bonding or ultrasonic welding. In addition, in some embodiments, the base 434 and the body 41 can also be integrally formed.

[0087] Figure 17For the distribution diagram of the light source assembly 42 and the support assembly 43, the light emitted by the light source assembly 42 irradiates the support assembly 43 from various angles (straight lines with arrows). h1 is the height of the first support arm 431, and h2 is the height of the second support arm 432. The light irradiates below the second support arm 432, forming a shadow area shadow2, and irradiates the part of the first support arm 431 above the second support arm 432, forming a shadow area shadow1. For a general support assembly 43, the shadow becomes lighter from the center to the two sides, and the shadow of the central area (shadow1) is the most serious.

[0088] In the embodiment of the present disclosure, the first support arm 431 is arranged for the central area (shadow1) with serious shadow. The first support arm 431 is relatively thin (the light is easy to pass through), and the thickness is about 0.6mm to 0.8mm; and the first support arm 431 is relatively narrow (reducing the area of light blocking), and the width is about 4mm to 5mm. Therefore, the shadow in the central area (shadow1) is greatly improved.

[0089] The second support arm 432 (which also causes a lot of shadows) that plays a role in strength support is adjusted in height so that the shadow is projected to shadow2. Since shadow2 is directly above the light source assembly 42, it will get close-range light compensation from the light source assembly 42, and the shadow in shadow2 will also be greatly improved. In the embodiment of the present disclosure, the human eye observes the backlight module from the side of the film 10, and the position of the support assembly 43 is arranged without obvious shadow, as shown in Figure 18 .

[0090] The support assembly 43 is integrated with the light bar 40 as a whole, which causes the support assembly 43 to be closer to the light source assembly 42 and aggravate the shadow. However, through the design of the support assembly 43 in the embodiment of the present disclosure, the shadow can be weakened, and the problem of shadow aggravation can be effectively solved.

[0091] In the exemplary embodiment, please refer to Figure 1 and Figure 2 , the height h1 of the first support arm 431 can be about 30.5mm to 32.5mm. The height h1 of the first support arm 431 can be about 31.5mm. Among them, the height h1 of the first support arm 431 can be the dimension of the first support arm 431 perpendicular to the direction of the back plate 30.

[0092] The width w1 of the first support arm 431 can be about 4mm to 5mm. For example, the width w1 of the first support arm 431 can be about 4.5mm. Among them, the width w1 of the first support arm 431 can be the dimension of the first support arm 431 perpendicular to the first plane;

[0093] The thickness t1 of the first support arm 431 can be about 0.6 mm to 0.8 mm. For example, the thickness t1 of the first support arm 431 can be about 0.7 mm. The thickness t1 of the first support arm 431 can be a dimension of the first support arm 431 in a direction parallel to the first plane.

[0094] In the exemplary embodiments, please refer to the drawings Figure 1 、 Figures 6 to 8 The height h2 of the second support arm 432 is greater than R1, where the height h2 of the second support arm 432 is a dimension of the second support arm 432 in a direction perpendicular to the back plate 30, and R1 is a bending radius of the first support arm 431 facing the bending side when the first support arm 431 is broken in the bent state. R1 is calculated by the following formula:

[0095] L1 = 2 * 3.14 * R1, where L1 is a circumference of the first support arm 431 facing the bending side in the bent state.

[0096] L2 = 2 * 3.14 * (R1 + t1), where L2 is a circumference of the first support arm 431 away from the bending side in the bent state, and t1 is the thickness of the first support arm 431.

[0097] r = h1 / L1, where r is an arc of the first support arm 431 in the bent state, and h1 is the height of the first support arm 431.

[0098] △h = 2 * 3.14 * t1 * h1 / L1, where △h is a difference between the circumference facing the bending side and the height of the first support arm 431 when the first support arm 431 is broken in the bent state.

[0099] e = △h / h1, where e is an elongation at break of the first support arm 431. The elongation at break is a characteristic of the material itself, and its value is fixed after the material is determined.

[0100] When the first support arm 431 is bent, a circular arc structure is formed. The bending radius R1 of the circular arc structure facing the bending side is less than the bending radius R2 of the circular arc structure away from the bending side. Correspondingly, the circumference L2 of the first support arm 431 away from the bending side in the bent state is also increased compared to the height h1 of the first support arm 431. When the increase (L2 - h1) is greater than the limit that can be tolerated by the elongation at break of the material itself, irreversible deformation, i.e. internal rupture, occurs, resulting in the inability to restore the original state.

[0101] According to the above formula, if the elongation at break and the structural dimensions of the first support arm 431 are known, R1 can be calculated. That is, when the first support arm 431 is bent to R1, irreversible rupture will occur.

[0102] In the embodiments of the present disclosure, e = 0.047, h1 = 32 mm, and t1 = 0.7 mm.

[0103] Then, Δh = e * h1 = 0.047 * 32 = 1.504 mm.

[0104] L1 = 2 * 3.14 * t1 * h1 / Δh = 2 * 3.14 * 0.7 * 32 / 1.504 = 93.53 mm.

[0105] R1 = L1 / 2 / 3.14 = 14.3 mm.

[0106] That is, when the first support arm 431 is bent to R1 = 14.3 mm, irreversible fracture will occur. For example, the height h2 of the second support arm 432 can be about 17 mm. In this way, when the height h2 of the second support arm 432 is greater than R1, the first support arm 431 can be prevented from being fractured, the irreversible deformation of the first support arm 431 can be ensured, and the sufficient resilience of the first support arm 431 can be maintained.

[0107] In the exemplary embodiments, please refer to Figure 1 and Figure 4 The width w2 of the second support arm 432 can be about 5 mm to 8 mm, for example, the width w2 of the second support arm 432 can be about 6.5 mm. The width of the second support arm 432 can be the dimension of the second support arm 432 perpendicular to the first plane direction.

[0108] The thickness of the second support arm 432 can be about 0.9 mm to 1.1 mm. For example, the thickness of the second support arm 432 can be about 1 mm. The thickness of the second support arm 432 can be the dimension of the second support arm 432 parallel to the first plane direction.

[0109] In the exemplary embodiments, please refer to Figure 2 and Figure 4 The height h3 of the protruding portion 433 is less than the height h2 of the second support arm 432. The increase of the protruding portion 433 can increase the dimension of the second support arm 432 in the thickness direction, and the shadow formed after the light passes through the second support arm 432 can be increased. Therefore, the height h3 of the protruding portion 433 is less than the height h2 of the second support arm 432, which can ensure the strength of the second support arm 432 and weaken the shadow formed after the light passes through the protruding portion 433.

[0110] The difference between the height h3 of the protrusion 433 and the height h2 of the second support arm 432 can be about 3.9mm to 4.1mm. For example, the difference between the height h3 of the protrusion 433 and the height h2 of the second support arm 432 can be about 4mm. Wherein the height h2 of the second support arm 432 can be the dimension of the second support arm 432 in the direction perpendicular to the back plate 30, and the height h3 of the protrusion 433 can be the dimension of the protrusion 433 in the direction perpendicular to the back plate 30.

[0111] In the exemplary embodiment, as shown in FIG. 4, the width w3 of the protrusion 433 can be about 0.9mm to 1.1mm. The width w3 of the protrusion 433 can be about 1mm or so. Wherein the width w3 of the protrusion 433 can be the dimension of the protrusion 433 in the direction perpendicular to the first plane. Figure 4

[0112] The thickness t3 of the protrusion 433 can be about 0.9mm to 1.1mm. The thickness t3 of the protrusion 433 can be about 1mm or so. Wherein the thickness t3 of the protrusion 433 can be the dimension of the protrusion 433 in the direction parallel to the first plane.

[0113] In the exemplary embodiment, as shown in FIG. 4, the interval distance g between the first support arm 431 and the second support arm 432 can be about 0.9mm to 1.1mm. For example, the interval distance g between the first support arm 431 and the second support arm 432 can be about 1mm or so. In this way, it is convenient for mold production. If the interval distance g is too small, the mold is not easy to make. If the interval distance g is too large, it will increase the overall width of the support assembly 43 and increase the shadow area. Figure 1 In the description in the present disclosure, it should be noted that the terms "upper", "lower", "one side", "the other side", "one end", "the other end", "edge", "opposite", "four corners", "perimeter", "mouth" structure" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the structure referred to has a particular orientation, is constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0114]

[0115] ​​In the description of the embodiments of the present disclosure, unless specifically defined and limited otherwise, the terms "connection", "direct connection", "indirect connection", "fixed connection", "installation", "assembly" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; the terms "installation", "connection", "fixed connection" can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0116] Although the embodiments disclosed in the present disclosure are as above, the content described is only the embodiments adopted for the convenience of understanding the present disclosure, and is not intended to limit the present disclosure. Any person skilled in the art of the present disclosure can make any modification and change in the form and details without departing from the spirit and scope of the present disclosure, but the patent protection scope of the present disclosure shall be subject to the appended claims.

Claims

1. A support assembly disposed between a diffuser plate and a back plate to form a cavity therebetween, characterized in that, The support assembly comprises: a first support arm arranged between the diffusion plate and the back plate, the first support arm being elastically bendable; and at least one second support arm arranged in a spaced manner with the first support arm, one end of the second support arm being arranged at the back plate, and the other end of the second support arm being arranged in a spaced manner with the diffusion plate.

2. The support assembly of claim 1, wherein, The first support arm is in a flat shape. The second support arm is in a flat shape and is coplanar with the first support arm.

3. The support assembly of claim 2, wherein, One of the two sides of the second support arm in the thickness direction of the second support arm is provided with a protruding portion.

4. The support assembly of claim 3, wherein, The protruding portion is arranged at a symmetry plane of the second support arm, the protruding portion is symmetrically arranged about the symmetry plane and extends along the symmetry plane, one end of the protruding portion is arranged at the back plate, and the other end of the protruding portion is arranged in a spaced manner with the diffusion plate.

5. The support assembly of claim 4, wherein, One end of the first support arm facing the diffusion plate has a first circular arc surface, and the first circular arc surface protrudes towards the diffusion plate.

6. The support assembly of claim 5, wherein, One end of the second support arm facing the diffusion plate has a second circular arc surface, and the second circular arc surface protrudes towards the diffusion plate.

7. The support assembly of claim 6, wherein, The number of the second support arms is two, and the second support arms are symmetrically arranged on both sides of the first support arm in the width direction of the first support arm.

8. A support assembly according to any one of claims 3 to 7, wherein, The support assembly further comprises a base, and the first support arm, the second support arm and the protruding portion are arranged on the base and arranged on the back plate through the base.

9. The support assembly of claim 2, wherein, The height of the first support arm is 30.5mm to 32.5mm, wherein the height of the first support arm is the dimension of the first support arm in the direction perpendicular to the back plate; The width of the first support arm is 4mm to 5mm; The thickness of the first support arm is 0.6mm to 0.8mm.

10. The support assembly of claim 9, wherein, The height of the second support arm is greater than R1, wherein the height of the second support arm is the dimension of the second support arm in the direction perpendicular to the back plate, R1 is the bending radius of the first support arm facing the bending side when the first support arm is broken in the bending state, and R1 is calculated by the following formula: L1=2*3.14*R1, wherein L1 is the circumference of the first support arm facing the bending side in the bending state; △h=2*3.14*t1*h1 / L1, wherein △h is the difference between the circumference of the first support arm facing the bending side when the first support arm is broken in the bending state and the height of the first support arm; e=△h / h1, wherein e is the elongation at break of the first support arm.

11. The support assembly of claim 10, wherein, The width of the second support arm is 5mm to 8mm; The thickness of the second support arm is 0.9mm to 1.1mm.

12. The support assembly of claim 4, wherein, The height of the protruding portion is less than the height of the second support arm, and the difference between the height of the protruding portion and the height of the second support arm is 3.9mm to 4.1mm, wherein the height of the second support arm is the dimension of the second support arm in the direction perpendicular to the back plate, and the height of the protruding portion is the dimension of the protruding portion in the direction perpendicular to the back plate.

13. The support assembly of claim 12, wherein, The width of the protruding portion is 0.9mm to 1.1mm; The thickness of the protruding portion is 0.9mm to 1.1mm.

14. The support assembly of claim 1, wherein, The spacing distance between the first support arm and the second support arm is 0.9mm to 1.1mm.

15. A light bar, characterized by The body comprises: a body; a plurality of light source assemblies, which are spaced apart from the body; and a plurality of support assemblies as claimed in any one of claims 1 to 14, which are integrated with the body and spaced apart from the light source assemblies.

16. A backlight module, characterized in that, comprise a film, a diffusion plate and a back plate arranged in sequence; a cavity is formed between the diffusion plate and the back plate; the backlight module further comprises a reflective sheet and a plurality of the light bars as claimed in claim 15, the plurality of light bars are accommodated in the cavity and arranged on the back plate, the plurality of light bars are electrically connected through a light bar line, the reflective sheet is accommodated in the cavity and covers one side of the light bars and the light bar line away from the back plate; the reflective sheet is provided with a first avoiding hole and a second avoiding hole for avoiding the light source assemblies and the support assemblies; the light source assemblies are exposed to the reflective sheet through the first avoiding hole; the support assemblies are exposed to the reflective sheet through the second avoiding hole.

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