Backlight module and display device

Abstract

The present invention discloses a backlight module and a display device. The backlight module includes a back plate, a diffuser, a reflector, a plurality of light-emitting components, and a plurality of support frames made of transparent materials. The diffuser is spaced apart from the back plate. The reflector is located between the back plate and the diffuser, and is provided with a plurality of first through holes and a plurality of second through holes. The light-emitting components are mounted on the back plate through the first through holes, and the light-emitting components press the reflector against the back plate. One end of the support frame is mounted on the back plate through the second through holes and presses the reflector against the back plate, and the other end of the support frame abuts the diffuser. In the present invention, the reflector is provided with a plurality of first through holes and a plurality of second through holes. The light-emitting components and the support frame respectively pass through the first through holes and the second through holes to mount the reflector on the back plate, thereby avoiding the phenomenon of the reflector being placed out of place, preventing the reflector from sagging and deforming, and preventing the light generated by the light-emitting components from causing shadows on the reflector. It is no longer necessary to mark the back plate for positioning. The back plate can be universally used, thereby reducing costs.

Description

Technical Field

[0001] The present invention relates to the technical field of display structures, and in particular to a backlight module and a display device. Background Art

[0002] Direct-type LED modules generally include a back panel, a reflector, a support frame, a light strip, a diffuser plate and an optical film, among which the back panel, reflector, light strip, diffuser plate and optical film are arranged in sequence from bottom to top, and the back panel is stamped with engraved lines. The support frame is made of transparent material, and the bottom of the support frame is installed according to the position of the engraved lines. When the support frame needs to be installed at a position without engraved lines, it can be installed and positioned by a tooling fixture. The top of the support frame is used to support the diffuser plate, and the reflector is fixed to the back panel with double-sided tape. The reflector and the support frame are staggered, and the light strips are suspended on the reflector plate at intervals.

[0003] However, this installation method has the following disadvantages:

[0004] 1. Since the reflective sheet is fixed to the back panel with double-sided tape, it is easy to stick it incorrectly when placing the reflective sheet, which can lead to improper placement of the reflective sheet, reducing production efficiency and increasing production costs;

[0005] 2. The edge of the reflector is glued to the back panel, which will cause the middle of the reflector to sag and deform. The light bar is suspended above the reflector. The deformation of the reflector will cause poor visual effects such as shadows.

[0006] 3. Some support frames perpendicular to the back panel have sharp tops. For example, CN208521107U discloses a diffuser panel bracket and backlight module. The sharp tops can easily damage the diffuser panel, and the internal buffer structure lacks sufficient support, which can easily cause the diffuser panel to collapse and result in poor visual effects.

[0007] 4. The back panel is positioned by stamping positioning lines to locate the pasting position of the support frame. After the back panel is stamped with positioning lines, the surface of the back panel will be deformed, resulting in poor appearance. At the same time, the back panel cannot be used universally when the product is derived, which increases the cost of re-mold and affects the progress of new product development. Summary of the Invention

[0008] The present invention provides a backlight module and a display device, aiming to solve the technical problems in the prior art that a reflective sheet is fixed to a back panel with double-sided tape, which makes it easy for the reflective sheet to be misplaced, the edge of the reflective sheet being adhered to the back panel may cause the middle of the reflective sheet to sag and deform, resulting in a shadow, and the back panel may be deformed due to the stamping of positioning lines, making it unusable.

[0009] The present invention provides a backlight module, comprising:

[0010] Back panel;

[0011] a diffuser plate, spaced apart from the back plate;

[0012] a reflector, located between the back plate and the diffuser, the reflector being penetrated by a plurality of first through holes and a plurality of second through holes arranged at intervals;

[0013] a plurality of light-emitting elements, each of which is mounted on the back plate through the first through-hole and presses the reflective sheet against the back plate;

[0014] A plurality of support frames are made of transparent material, one end of each support frame is mounted on the back plate through the second through hole and presses the reflective sheet on the back plate, and the other end of each support frame is in contact with the diffuser plate.

[0015] Furthermore, the support frame includes a tower base, a support plate and a slanted top arranged at an angle to the support plate. The tower base is connected to the back plate through the second through hole and pressed against the reflector. The support plate is inclined relative to the back plate. One end of the support plate is connected to the tower base and the other end is connected to the slanted top.

[0016] Furthermore, a plane is provided on a side of the inclined top close to the diffuser plate, and the inclined top abuts against the diffuser plate through the plane.

[0017] Furthermore, the tower base is "T"-shaped, and includes a base plate connected to the support plate and a pillar protruding from one side of the base plate. The pillar passes through the second through hole and is connected to the back plate, and the base plate is pressed against the reflector.

[0018] Furthermore, the support plate is a trapezoidal structure, and the width of the support plate gradually decreases from an end close to the tower base to an end close to the inclined top.

[0019] Furthermore, the light-emitting component includes a lampshade, lamp beads and a substrate installed on the back panel, the lamp beads are arranged on the substrate, the lampshade is arranged on the lamp beads, the lampshade is spaced apart from the substrate, and the lampshade is elastically abutted against the reflective sheet through the first through hole.

[0020] Furthermore, the reflective sheet includes a plurality of elastically spaced tongues, and a plurality of the tongues enclose the first through hole. The tongues have a bent state in which they are bent and abut against the outer wall of the lampshade, and a flattened state in which they are clamped between the lampshade and the substrate. During the installation of the reflective sheet, the tongues can gradually change from the bent state to the flattened state.

[0021] Furthermore, the reflector includes a base and an annular fold, the annular fold is tilted relative to the base, one end of the annular fold is connected to the edge of the base, and the other end is connected to the diffuser, and the first through hole and the second through hole are both provided on the base.

[0022] Furthermore, the backlight module further comprises an optical film and liquid crystal glass. The liquid crystal glass is arranged on a side of the diffusion plate away from the back plate, and the optical film is arranged between the liquid crystal glass and the diffusion plate.

[0023] The present invention also provides a display device, comprising the backlight module as described above.

[0024] Compared with the prior art, the beneficial effects of the present invention include at least:

[0025] In the present invention, a plurality of first through holes and a plurality of second through holes are formed through the reflective sheet. The light-emitting elements are mounted on the back panel through the first through holes, and the support frame is mounted on the back panel through the second through holes. The light-emitting elements and the support frame can fix the reflective sheet to the back panel, eliminating the original double-sided tape, avoiding the phenomenon of the reflective sheet being improperly placed, improving production efficiency, and reducing production costs.

[0026] The fixing method of the reflector has been changed. The reflector will not sag or deform. The light-emitting component is fixed to the back panel. The light-emitting component is no longer suspended in the air. The light generated by the light-emitting component will not cause shadows on the reflector, effectively avoiding product defects.

[0027] The support frame is provided with a flat surface on one side close to the diffuser plate. The support frame contacts the diffuser plate through the flat surface, which increases the contact area between the support frame and the diffuser plate and makes it less likely to damage the diffuser plate. In addition, the support plate in the support frame is inclined, which can provide sufficient elastic support force to prevent the diffuser plate from sagging.

[0028] The support frame can be positioned on the back panel as needed, and there is no need for back panel positioning lines. The back panel positioning lines are cancelled, avoiding deformation of the back panel surface caused by stamping lines and causing poor appearance. The back panel can be used universally when the product is derived, which reduces production costs and speeds up the progress of new product development. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A partial cross-sectional view of a backlight module provided by an embodiment of the present invention;

[0030] Figure 2 A schematic structural diagram of a reflector provided in an embodiment of the present invention;

[0031] Figure 3 A schematic structural diagram of a backlight module provided by an embodiment of the present invention after removing the optical film and liquid crystal glass;

[0032] Figure 4 for Figure 3 A partial enlarged schematic diagram of point A in the middle;

[0033] Figure 5 for Figure 4 sectional view of

[0034] Figure 6 A cross-sectional view of a support frame with double-sided tape provided in an embodiment of the present invention;

[0035] Figure 7 A schematic diagram of a portion of the structure when the support frame and the reflector are separated according to an embodiment of the present invention;

[0036] Figure 8 for Figure 3 A partial enlarged schematic diagram of point B in the middle;

[0037] Figure 9 for Figure 8 A cross-sectional view of the middle tab in a bent state;

[0038] Figure 10 for Figure 8 Cross-section view of the middle tab in its flattened position.

[0039] In the picture:

[0040] 10. Back panel; 20. Diffuser plate; 30. Reflector; 31. First through hole; 32. Second through hole; 33. Tab; 34. Base plate; 35. Annular folding piece; 351. First sheet; 352. Second sheet; 40. Optical film; 50. Liquid crystal glass; 60. Light-emitting part; 61. Lampshade; 62. Lamp beads; 63. Base plate; 70. Support frame; 71. Tower base; 711. Bottom plate; 712. Pillar; 72. Support plate; 73. Slanted top; 731. Plane; 80. Double-sided tape. DETAILED DESCRIPTION

[0041] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0042] See also Figures 1 to 2 The embodiment of the present invention discloses a backlight module, including a back plate 10, a diffuser 20, a reflective sheet 30, an optical film 40, a liquid crystal glass 50, a plurality of light-emitting components 60, and a plurality of support frames 70. The diffuser 20 is spaced apart from the back plate 10, the reflective sheet 30 is located between the back plate 10 and the diffuser 20, the liquid crystal glass 50 is located on the side of the diffuser 20 away from the back plate 10, and the optical film 40 is located between the liquid crystal glass 50 and the diffuser 20. Figure 1 As shown in FIG, the liquid crystal glass 50, the optical film 40, the diffuser 20, the reflector 30 and the back plate 10 are arranged in sequence from top to bottom.

[0043] In this embodiment, the reflective sheet 30 is penetrated by a plurality of first through holes 31 and a plurality of second through holes 32 arranged at intervals. The light-emitting component 60 and the support frame 70 are both located between the back plate 10 and the diffuser 20. The light-emitting component 60 is installed on the back plate 10 through the first through hole 31, and the light-emitting component 60 presses the reflective sheet 30 on the back plate 10; the support frame 70 is made of a transparent material, and one end of the support frame 70 is installed on the back plate 10 through the second through hole 32, and the support frame 70 presses the reflective sheet 30 on the back plate 10. The plurality of light-emitting components 60 and the plurality of support frames 70 can fix the reflective sheet 30 on the back plate 10, avoiding the phenomenon that the reflective sheet 30 is not placed in place, improving production efficiency, and reducing production costs. The other end of the support frame 70 is in contact with the diffuser 20 to support the diffuser 20.

[0044] In this embodiment, the reflective sheet 30 is mainly fixed to the back panel 10 by a number of light-emitting components 60, and the support frame 70 serves to assist in fixing the reflective sheet 30 to the back panel 10. The light-emitting components 60 are used to emit light, part of which will propagate upward, and the other part of which will propagate downward. The light-emitting components 60 will deflect the downward light and propagate it upward to form a dot matrix light. The optical film 40 will correct the propagation direction of the light and convert the dot matrix light into a plane array light. Finally, the light enters the liquid crystal glass 50, and the liquid crystal glass 50 is energized to produce a picture. The support frame 70 serves to support the diffuser 20, and the back panel 10 is used to protect the reflective sheet 30 from being hit by foreign objects.

[0045] Please see further Figure 1 、 Figures 3 to 7 The support frame 70 is a tower-shaped structure. The support frame 70 includes a tower base 71, a support plate 72 and an inclined top 73 arranged at an angle to the support plate 72. The tower base 71 is connected to the back plate 10 through the second through hole 32. The tower base 71 presses the reflective sheet 30 on the back plate 10. The tower base 71 in the support frame 70 is adhered to the back plate 10 by a double-sided tape 80. One end of the support plate 72 is connected to the tower base 71 and the other end is connected to the inclined top 73. The support plate 72 is inclined relative to the back plate 10, making the support frame 70 more flexible and providing sufficient elastic supporting force to support the diffuser 20, the optical film 40 and the liquid crystal glass 50, thereby preventing the diffuser 20 from sagging and playing a buffering role to improve product quality.

[0046] In some embodiments, the support plate 72 is a trapezoidal structure, and the width of the support plate 72 gradually decreases from the end close to the tower base 71 to the end close to the inclined top 73, further improving the elastic supporting force of the support frame 70. The inclined top 73 is provided with a plane 731 on the side close to the diffuser plate 20, and the inclined top 73 is in contact with the diffuser plate 20 through the plane 731, thereby increasing the contact area between the support frame 70 and the diffuser plate 20, and is not easy to damage the diffuser plate 20.

[0047] The tower base 71 is "T"-shaped. The tower base 71 includes a bottom plate 711 connected to the support plate 72 and a pillar 712 protruding from one side of the bottom plate 711. The second through hole 32 is a rectangular structure. The pillar 712 is connected to the back plate 10 after passing through the second through hole 32. The bottom plate 711 is pressed against the reflective sheet 30. The support frame 70 is positioned by the second through hole 32, and the back plate 10 line is eliminated, which reduces the mold cost of the back plate 10 and improves the versatility of the back plate 10. At the same time, it can limit the upper and lower position movement of the reflective sheet 30 to prevent the reflective sheet 30 from arching or collapsing, prevent the occurrence of poor visual effects of the backlight module product, and improve the quality of the backlight module product.

[0048] Please see further Figure 1 、 Figure 2 ,as well as Figures 8 to 10 In this embodiment, the light-emitting component 60 includes a lampshade 61, a lamp bead 62 and a substrate 63 installed on the back plate 10. The lamp bead 62 is arranged on the substrate 63. The lampshade 61 is arranged on the end of the lamp bead 62 away from the substrate 63. The lampshade 61 and the substrate 63 are spaced apart. The lampshade 61 elastically abuts against the reflective sheet 30 through the first through hole 31 to position and limit the reflective sheet 30.

[0049] The reflector 30 includes a plurality of elastically spaced tongues 33, each of which is symmetrical to each other. The plurality of tongues 33 enclose the first through hole 31 as described above. Figure 9 As shown, the latch 33 is in a bent state in contact with the outer wall of the lampshade 61. Figure 10 As shown, the latch tongue 33 also has a flattened state when clamped between the lampshade 61 and the base plate 63 . During the installation of the reflector 30 , the latch tongue 33 can gradually change from a bent state to a flattened state to fix the reflector 30 .

[0050] Specifically, before installing the reflective sheet 30, the light-emitting component 60 is first installed on the back panel 10, and then a number of first through holes 31 are opened on the reflective sheet 30 according to the position of the light-emitting component 60, and a number of tongues 33 are cut out at the edge of the first through holes 31. Then, the reflective sheet 30 is sleeved on each light-emitting component 60 through the first through holes 31. At this time, each tongue 33 can elastically abut against the outer wall of the lampshade 61, and the tongue 33 is in a bent state. Then, each tongue 33 is pressed between the lampshade 61 and the substrate 63 in a targeted manner, and the tongue 33 is in a flattened state. This embodiment eliminates the double-sided tape 80 originally used to fix the reflective sheet 30, thereby avoiding problems such as difficult placement, offset, and multiple manual corrections when the reflective sheet 30 is pasted with the double-sided tape 80, thereby improving the installation efficiency of the reflective sheet 30 and reducing production costs.

[0051] The reflector 30 includes a base 34 and an annular folding piece 35. The annular folding piece 35 is arranged at an angle relative to the base 34. One end of the annular folding piece 35, i.e., the bottom, is connected to the edge of the base 34, and the other end, i.e., the top, is connected to the diffuser 20. The first through hole 31 and the second through hole 32 are both provided on the base 34. The base 34, the annular folding piece 35, the back plate 10 and the diffuser 20 form a closed chamber to prevent the light emitted by the light-emitting element 60 from leaking.

[0052] The annular folding piece 35 includes two oppositely arranged first sheets 351 and two oppositely arranged second sheets 352. The first sheets 351 and the second sheets 352 are both inclined with respect to the substrate 34. The two side ends of the first sheet 351 are respectively connected to the two second sheets 352. The tops of the first sheet 351 and the second sheet 352 are both connected to the diffuser 20, and the bottoms of the first sheet 351 and the second sheet 352 are both connected to the edge of the substrate 34.

[0053] An embodiment of the present invention further discloses a display device, comprising the backlight module as described above.

[0054] Installation principle of backlight module:

[0055] First, each light-emitting component 60 is installed on the back panel 10, and then a plurality of first through holes 31 are opened on the reflective sheet 30 according to the position of the light-emitting component 60, and a plurality of square second through holes 32 are opened as needed. The first through holes 31 are formed by a plurality of latches 33, and then the reflective sheet 30 is sleeved on each light-emitting component 60 through the first through holes 31. At this time, each latch 33 elastically abuts against the outer wall of the lampshade 61, and the latch 33 is in a bent state. Then, each latch 33 is pressed between the corresponding lampshade 61 and the substrate 63 in a targeted manner, and the latch 33 is flattened. Then, the support frame 70 is installed on the back panel 10 through the second through holes 32. The support frame 70 presses the reflective sheet 30 on the back panel 10 to complete the fixation of the reflective sheet 30. Finally, the diffuser 20, the optical film 40 and the liquid crystal glass 50 are installed on the reflective sheet 30 in turn.

[0056] In summary, in the present invention, the reflective sheet 30 is provided with a plurality of first through holes 31 and a plurality of second through holes 32. The light-emitting elements 60 are mounted on the back plate 10 through the first through holes 31, and the support frame 70 is mounted on the back plate 10 through the second through holes 32. The original double-sided tape 80 is eliminated. The light-emitting elements 60 and the support frames 70 can fix the reflective sheet 30 on the back plate 10, thereby avoiding the phenomenon of the reflective sheet 30 being misplaced. The reflective sheet 30 will not sag or deform, thereby improving production efficiency and reducing production costs.

[0057] The support frame 70 is made of transparent material, and the support plate 72 is at a certain angle to the tower base 71, making the support frame 70 elastic and providing cushioning performance. At the same time, the support frame 70 is provided with a slanted roof 73 structure to further support the diffuser plate 20, optical film 40 and liquid crystal glass 50, thereby preventing relative movement of the components during production, mechanical testing, storage and transportation, which may cause damage or collapse of the diffuser plate 20 and other adverse effects on the product visual quality.

[0058] The support frame 70 can be positioned on the back panel 10 as needed, and there is no need for positioning lines on the back panel 10. The positioning lines on the back panel 10 are cancelled, and the deformation of the surface of the back panel 10 caused by stamping lines is avoided, which causes poor appearance. The back panel 10 can be used universally when the product is derived, which reduces production costs and speeds up the progress of new product development.

[0059] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A backlight module, characterized in that: include: Back panel; a diffuser plate, spaced apart from the back plate; a reflector, located between the back plate and the diffuser, the reflector being penetrated by a plurality of first through holes and a plurality of second through holes arranged at intervals; a plurality of light-emitting elements, each of which is mounted on the back plate through the first through-hole and presses the reflective sheet against the back plate; a plurality of support frames made of transparent material, one end of each support frame being mounted on the back plate through the second through hole and pressing the reflective sheet against the back plate, and the other end of each support frame being in contact with the diffuser plate; The support frame includes a tower base, a support plate, and an inclined top arranged at an angle to the support plate, wherein the tower base is connected to the back plate through the second through hole and presses against the reflector, and the support plate is inclined relative to the back plate, with one end of the support plate connected to the tower base and the other end connected to the inclined top; The tower base is "T"-shaped and includes a base plate connected to the support plate and a pillar protruding from one side of the base plate. The pillar passes through the second through hole and is connected to the back plate through the double-sided tape. The base plate is pressed against the reflector.

2. The backlight module according to claim 1, wherein: A plane is provided on one side of the inclined top close to the diffuser plate, and the inclined top abuts against the diffuser plate through the plane.

3. The backlight module according to claim 1, wherein: The support plate is a trapezoidal structure, and the width of the support plate gradually decreases from an end close to the tower base to an end close to the inclined top.

4. The backlight module according to claim 1, wherein: The light-emitting component includes a lampshade, lamp beads and a substrate installed on the back plate. The lamp beads are arranged on the substrate, and the lampshade is arranged on the lamp beads. The lampshade is spaced apart from the substrate, and the lampshade is elastically abutted against the reflective sheet through the first through hole.

5. The backlight module according to claim 4, wherein: The reflector sheet includes a plurality of elastically spaced latches, and the plurality of latches enclose the first through hole. The latches have a bent state in which they are bent and abut against the outer wall of the lampshade, and a flattened state in which they are clamped between the lampshade and the substrate. During the installation of the reflector sheet, the latches can gradually change from the bent state to the flattened state.

6. The backlight module according to claim 1, wherein: The reflector includes a base and an annular folding piece, the annular folding piece is tilted relative to the base, one end of the annular folding piece is connected to the edge of the base, and the other end is connected to the diffuser plate, and the first through hole and the second through hole are both provided on the base.

7. The backlight module according to claim 1, wherein: The backlight module further comprises an optical film and liquid crystal glass. The liquid crystal glass is arranged on a side of the diffusion plate away from the back plate, and the optical film is arranged between the liquid crystal glass and the diffusion plate.

8. A display device, characterized in that: The backlight module comprises the backlight module according to any one of claims 1 to 7.

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