Display device and backlight module

Abstract

A display device and a backlight module are disclosed. The display device includes a backlight module and a display panel. The display panel is disposed on the backlight module. The backlight module includes a back plate, a lamp plate, a support column, a buffer member, and a diffusion plate. The lamp plate is disposed on an inner side surface of the back plate. The support column includes a base and a support structure. The support structure extends from the base. The back plate and the lamp plate are sandwiched between the base and the support structure. The buffer member is disposed on a top of the support structure. The diffusion plate is disposed on the lamp plate and the back plate at a distance. The diffusion plate abuts the buffer member. In an embodiment, the backlight module can include an elastic member sleeved on the support structure. Two ends of the elastic member abut the back plate and the base, respectively.

Description

Technical Field

[0001] This invention relates to a display device and a backlight module, and more particularly to a backlight module having a support column for fixing a backplate and a lamp plate, and a display device equipped with the backlight module. Background Technology

[0002] In the design of direct-lit backlight modules, the lamp panel is typically fixed to the back panel with screws or adhesive. A support post is placed between the diffuser plate and the lamp panel to support the diffuser plate and prevent deformation that could affect light output. However, gaps often exist between the support post and the diffuser plate due to manufacturing or assembly tolerances. When the backlight module is subjected to vibration or impact, the support post can collide with the diffuser plate, producing noise, which is particularly noticeable in automotive displays. Furthermore, the support post is also prone to detaching from the lamp panel due to vibration or impact. Summary of the Invention

[0003] The purpose of this invention is to provide a backlight module having a support column for fixing a backplate and a lamp plate, and a display device equipped with the backlight module, so as to solve the above-mentioned problems.

[0004] According to one embodiment, the present invention provides a display device comprising a backlight module and a display panel. The display panel is disposed on the backlight module. The backlight module includes a back plate, a lamp panel, a support column, a buffer member, and a diffuser plate. The back plate has a first through hole. The first through hole penetrates an inner side and an outer side of the back plate. The lamp panel is disposed on the inner side of the back plate. The lamp panel has a second through hole penetrating the lamp panel. The first through hole and the second through hole are aligned. The support column includes a base and a support structure. The support structure extends and protrudes from the base. The support structure passes through the first through hole and the second through hole, such that the back plate and the lamp panel are sandwiched between the base and the support structure. The buffer member is disposed on the top of the support structure. The diffuser plate is disposed on the lamp panel and the back plate at a certain distance. The diffuser plate abuts against the buffer member.

[0005] In one embodiment, the support structure includes two spring arms. The two spring arms are opposite to each other. A buffer is clamped between the two spring arms.

[0006] In one embodiment, each spring arm has a first limiting portion. The buffer member has a second limiting portion. The first limiting portion and the second limiting portion engage to limit the range of movement and deformation of the buffer member.

[0007] In one embodiment, each spring arm has an inclined surface. The inclined surface abuts against the lamp panel.

[0008] In one embodiment, the buffer has an arc-shaped head. The diffuser plate abuts against the arc-shaped head.

[0009] In one embodiment, the back plate has a first receiving groove. The base is received in the first receiving groove.

[0010] In one embodiment, the base has a positioning portion. A positioning groove is formed around the first receiving groove. The positioning portion engages with the positioning groove.

[0011] In one embodiment, the backlight module further includes an elastic member. The back plate has a second receiving groove. The second receiving groove is located between the first through hole and the first receiving groove. The elastic member is sleeved on the support structure and located in the second receiving groove. The two ends of the elastic member abut against the outer side of the back plate and the base, respectively.

[0012] According to one embodiment, the present invention provides a backlight module comprising a backplate, a lamp panel, a support column, and an elastic member. The backplate has a first through hole penetrating an inner side and an outer side of the backplate. The lamp panel is disposed on the inner side of the backplate. The lamp panel has a second through hole penetrating it. The first through hole and the second through hole are aligned. The support column includes a base and a support structure. The support structure extends and protrudes from the base. The support structure passes through the first and second through holes, such that the backplate and the lamp panel are clamped between the base and the support structure. The elastic member is sleeved on the support structure. Both ends of the elastic member abut against the outer side of the backplate and the base, respectively.

[0013] In one embodiment, the backlight module further includes a buffer and a diffuser plate. The buffer is disposed on top of the support structure. The diffuser plate is disposed on the lamp panel and the back panel at a certain distance apart. The diffuser plate abuts against the buffer.

[0014] In summary, this invention uses the base of the support column and the support structure to clamp the back plate and the lamp panel, allowing the support column to simultaneously support the diffuser plate and fix the lamp panel. This eliminates the need for screws required for installing the lamp panel or support column, reducing manufacturing costs and assembly time. In one embodiment, a buffer can be fixed to the top of the support structure. When the backlight module is subjected to vibration or impact, the buffer provides collision cushioning between the support column and the diffuser plate, thereby preventing noise. In another embodiment, an elastic element can be sleeved on the support structure, with its two ends abutting against the back plate and the support column base, respectively. The elastic element provides elastic force to strengthen the clamping force of the support column on the back plate and the lamp panel, thereby preventing noise caused by the support column loosening and wobbling.

[0015] The advantages and spirit of the present invention can be further understood through the following detailed description of the invention and the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a perspective view of a display device according to an embodiment of the present invention.

[0017] Figure 2 This is a perspective view of a display device according to an embodiment of the present invention from another angle.

[0018] Figure 3 This is an exploded view of a display device according to an embodiment of the present invention.

[0019] Figure 4 This is a perspective view of the combination of a support column and a buffer member according to an embodiment of the present invention.

[0020] Figure 5 This is a partial cross-sectional view of a display device according to an embodiment of the present invention.

[0021] Figure 6 This is a partial cross-sectional view of a display device according to an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached drawings: 1, 1' - Display device; 10 - Backlight module; 12 - Display panel; 100 - Back plate; 102 - Lamp board; 104 - Support column; 106 - Buffer; 108 - Diffuser plate; 110 - Optical film; 112 - Reflective sheet; 114 - Elastic element; 1000 - First through hole; 1002 - First receiving groove; 1004 - Positioning groove; 1006 - Second receiving groove; 1020 - Circuit board; 1022 - Light-emitting unit; 1024 - Second through hole; 1040 - Base; 1042 - Support structure; 1044 - Elastic arm; 1046 - First limiting part; 1048 - Inclined surface; 1050 - Positioning part; 1060 - Arc head; 1062 - Second limiting part. Detailed Implementation

[0023] Please see Figures 1 to 5 , Figure 1 This is a perspective view of a display device 1 according to an embodiment of the present invention. Figure 2 This is a perspective view of a display device 1 according to an embodiment of the present invention from another viewpoint. Figure 3 This is an exploded view of a display device 1 according to an embodiment of the present invention. Figure 4 This is a perspective view of the combination of the support column 104 and the buffer member 106 according to an embodiment of the present invention. Figure 5 This is a partial cross-sectional view of a display device 1 according to an embodiment of the present invention.

[0024] like Figures 1 to 3 As shown, the display device 1 includes a backlight module 10 and a display panel 12. The display panel 12 is disposed on the backlight module 10. In practical applications, the display panel 12 may be a liquid crystal display panel, but is not limited thereto. The display device 1 provides light to the display panel 12 through the backlight module 10 to display an image.

[0025] The backlight module 10 includes a backplate 100, a lamp board 102, a support post 104, a buffer 106, a diffuser plate 108, and at least one optical film 110. In this embodiment, the backlight module 10 may be a direct-type backlight module, but is not limited thereto. For example, the lamp board 102 may be disposed on an inner side of the backplate 100 facing the display panel 12. The lamp board 102 may include a circuit board 1020 and a plurality of light-emitting units 1022, wherein the plurality of light-emitting units 1022 are disposed on the circuit board 1020. The light-emitting units 1022 may be mini light-emitting diodes (mini LEDs), but are not limited thereto. The diffuser plate 108 is disposed on the lamp board 102 and the backplate 100 at a certain distance, and at least one optical film 110 is disposed on the diffuser plate 108. At least one optical film 110 may include a brightness enhancement film (BEF), a prism sheet, a diffuser sheet, etc., depending on the actual application. In addition, a reflective sheet 112, a reflective element, or a reflective coating may be provided on the circuit board 1020 to reflect light toward the diffuser plate 108.

[0026] In one embodiment of the present invention, the back panel 100 has a first through hole 1000, and the lamp panel 102 has a second through hole 1024, wherein the first through hole 1000 penetrates the inner and outer surfaces of the back panel 100, and the second through hole 1024 penetrates the lamp panel 102 and is aligned with the first through hole 1000. Furthermore, the support column 104 includes a base 1040 and a support structure 1042, wherein the support structure 1042 extends and protrudes from the base 1040, and a portion of the structure has a certain degree of elastic deformation and repositioning. The support column 104 may be made of a heat-resistant material to meet the temperature variation requirements of the vehicle-mounted environment, and the surface of the support structure 1042 may have a light-reflective or reflective coating. When the support column 104 is installed, the support structure 1042 passes through the first through hole 1000 and the second through hole 1024 from the outer side of the back plate 100. Since the base 1040 of the support column 104 and the support structure 1042 are wider than the first through hole 1000 and the second through hole 1024, after the support column 104 is installed, the back plate 100 and the lamp panel 102 are clamped between the base 1040 and the support structure 1042 of the support column 104. Figure 5 As shown. Thus, the support column 104 can fix or limit the back plate 100 and the lamp plate 102. It should be noted that the number of support columns 104, the first through hole 1000, and the second through hole 1024 are mutually corresponding and can be determined according to actual application; therefore, the present invention is not limited to the embodiment shown in the figure.

[0027] In one embodiment of the present invention, the buffer 106 is fixed or mounted on the top of the support structure 1042. During the assembly of the backlight module 10, the diffuser plate 108 is disposed on the back plate 100 and abuts against the buffer 106. The buffer 106 may be made of a soft material and has compressible and restorable elasticity. In one embodiment of the present invention, the soft material used to make the buffer 106 may be silicone, rubber, or other soft materials, and may have light reflectivity, light diffusion, or light transmittance, for example, by incorporating light reflective or light diffusion particles, depending on the actual application. Figure 5 As shown, since the buffer 106 is fixed to the top of the support structure 1042, the diffuser plate 108 abuts against the buffer 106. When the display device 1 is shaken, vibrated or bumped, the buffer 106 can provide collision buffer between the support column 104 and the diffuser plate 108 to avoid abnormal noise or damage to the surface of the diffuser plate 108.

[0028] In one embodiment of the present invention, the top of the buffer 106 may have an arc-shaped head 1060. The diffuser 108 may abut against the arc-shaped head 1060. The arc-shaped head 1060 can reduce the contact area between the buffer 106 and the diffuser 108, avoiding excessive contact area from affecting optical performance. At the same time, when the support column 104 collides with the diffuser 108, the arc-shaped head 1060 can absorb the impact force as a buffer and be pressed down and deformed, and then elastically recover to an arc shape.

[0029] In one embodiment of the present invention, the support structure 1042 of the support column 104 may include two elastic arms 1044, wherein the two elastic arms 1044 are opposite to each other and have partial elasticity. Each elastic arm 1044 has a first limiting part 1046 and a slope 1048, and each side of the lower section of the buffer member 106 has a second limiting part 1062, the second limiting part 1062 being embedded or engaged with the first limiting part 1046.

[0030] In one embodiment of the present invention, when assembling the backlight module 10, the lamp board 102 is first disposed on the inner side of the back plate 100, and the first through hole 1000 is aligned with the second through hole 1024. Next, the two spring arms 1044 of the support column 104 are inserted into the first through hole 1000 and the second through hole 1024 from the outer side of the back plate 100. At this time, the two spring arms 1044 will be compressed by the first through hole 1000 and the second through hole 1024 and deform inward elastically. When the inclined surface 1048 of the two spring arms 1044 passes through the second through hole 1024, the two spring arms 1044 will spring back outward and return to their original position. In this way, the inclined surface 1048 of the two spring arms 1044 will abut against the lamp plate 102 on the inner side of the back plate 100, and the base 1040 will abut against the outer side of the back plate 100, so that the back plate 100 and the lamp plate 102 are clamped between the base 1040 and the support structure 1042 of the support column 104. Figure 5As shown. Next, the lower section of the buffer 106 is inserted into the space between the two spring arms 1044. At this time, the two spring arms 1044 can elastically deform outward to accommodate the lower section of the buffer 106. When the second limiting part 1062 of the lower section of the buffer 106 passes the first limiting part 1046, the first limiting part 1046 can engage with the second limiting part 1062 to restrict the movement of the buffer 106, and the two spring arms 1044 can spring back inward to reset. In this way, the buffer 106 can be securely clamped between the two spring arms 1044, and the arc-shaped head 1060 abuts against the top of the two spring arms 1044. In one embodiment of the present invention, the second limiting part 1062 of the buffer 106 is a snap-fit ​​structure, and the first limiting part 1046 of the two spring arms 1044 is a slot. The two can be fixed by a tight fit. However, the present invention is not limited to this. For example, the second limiting part 1062 can be a slot, the first limiting part 1046 can be a hook, and the two can also be other fitting or connecting fixing structures.

[0031] like Figure 2 and Figure 5 As shown, in one embodiment of the present invention, the first through hole 1000 of the back plate 100 can be connected to a first receiving groove 1002. The first receiving groove 1002 is located on the outer side of the back plate 100. The base 1040 of the support column 104 can be received or fitted into the first receiving groove 1002 and abut against the outer side of the back plate 100 inside the first receiving groove 1002 to prevent the base 1040 from protruding too much from the back plate 100. In one embodiment of the present invention, the base 1040 may have a positioning part 1050, and a positioning groove 1004 may be formed around the first receiving groove 1002. When the base 1040 is received in the first receiving groove 1002 and abuts against the outer side of the back plate 100 inside the first receiving groove 1002, the positioning part 1050 will engage with the positioning groove 1004 to restrict the movement and rotation of the support column 104, and the bottom surface of the base 1040 is coplanar with the outer surface of the back plate 100. It should be noted that the number of positioning parts 1050 and positioning grooves 1004 are mutually corresponding and can be determined according to the actual application. Therefore, the present invention is not limited to the embodiments shown in the figures. For example, the positioning part 1050 may be formed in the first receiving groove 1002, while the base 1040 has a positioning groove 1004, and the two can still be engaged.

[0032] Please see Figure 6 , Figure 6 This is a partial cross-sectional view of a display device 1' according to an embodiment of the present invention.

[0033] The main difference between display device 1' and the aforementioned display device 1 is that the backlight module 10 of display device 1' further includes an elastic member 114, and the elastic member 114 abuts against the outer side of the back plate 100 instead of the base 1040, such as... Figure 6As shown. In one embodiment of the present invention, the back plate 100 further has a second receiving groove 1006, wherein the second receiving groove 1006 is located between the first through hole 1000 and the first receiving groove 1002. The elastic member 114 is sleeved on the support structure 1042 of the support column 104 and located in the second receiving groove 1006, such that the two ends of the elastic member 114 abut against the outer side of the back plate 100 and the base 1040 of the support column 104 respectively in the second receiving groove 1006. The elastic member 114 can provide elastic force to strengthen the clamping force of the support column 104 on the back plate 100 and the lamp plate 102, thereby preventing the support column 104 from producing abnormal noise due to loosening and shaking. In one embodiment of the present invention, the elastic element 114 may be a compression spring, but is not limited thereto. In addition, the second receiving groove 1006 may have a different shape from the first receiving groove 1002, or the first receiving groove 1002 on the back plate 100 may extend inward to simultaneously accommodate the base 1040 of the support column 104 and the elastic element 114.

[0034] In summary, this invention uses the base of the support column and the support structure to clamp the back plate and the lamp panel, allowing the support column to simultaneously support the diffuser plate and fix the lamp panel. This eliminates the need for screws required for installing the lamp panel or support column, reducing manufacturing costs and assembly time. In one embodiment, a buffer can be fixed to the top of the support structure. When the backlight module is subjected to vibration or impact, the buffer provides collision cushioning between the support column and the diffuser plate, thereby preventing noise. In another embodiment, an elastic element can be sleeved on the support structure, with its two ends abutting against the back plate and the support column base, respectively. The elastic element provides elastic force to strengthen the clamping force of the support column on the back plate and the lamp panel, thereby preventing noise caused by the support column loosening and wobbling.

[0035] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made in accordance with the claims of the present invention should be included within the scope of the present invention.

Claims

1. A display device, characterized in that, Include: A display panel; and A backlight module, the display panel being disposed on the backlight module, the backlight module comprising: A back plate having a first through hole that penetrates an inner side and an outer side of the back plate; A light panel is disposed on the inner side of the back panel. The light panel has a second through hole penetrating the light panel, and the first through hole is aligned with the second through hole. A support column includes a base and a support structure. The support structure extends and protrudes from the base and passes through the first through hole and the second through hole, so that the back plate and the lamp plate are clamped between the base and the support structure. A buffer element is disposed at the top of the support structure; and A diffuser plate is disposed at a certain distance between the lamp plate and the back plate, and the diffuser plate abuts against the buffer.

2. The display device as claimed in claim 1, characterized in that, The support structure includes two spring arms facing each other, and the buffer is clamped between the two spring arms.

3. The display device as claimed in claim 2, characterized in that, Each of the spring arms has a first limiting part, and the buffer has a second limiting part. The first limiting part and the second limiting part engage to limit the range of movement and deformation of the buffer.

4. The display device as claimed in claim 2, characterized in that, Each of the spring arms has a ramp that abuts against the light panel.

5. The display device as claimed in claim 1, characterized in that, The buffer has an arc-shaped head, and the diffuser plate abuts against the arc-shaped head.

6. The display device as claimed in claim 1, characterized in that, The back panel has a first receiving groove in which the base is received.

7. The display device as claimed in claim 6, characterized in that, The base has a positioning part, and a positioning groove is formed around the first receiving groove, and the positioning part engages with the positioning groove.

8. The display device as claimed in claim 6, characterized in that, The backlight module further includes an elastic member. The back plate has a second receiving groove, which is located between the first through hole and the first receiving groove. The elastic member is sleeved on the support structure and located in the second receiving groove. The two ends of the elastic member abut against the outer side of the back plate and the base, respectively.

9. A backlight module, characterized in that, Include: A back plate having a first through hole that penetrates an inner side and an outer side of the back plate; A light panel is disposed on the inner side of the back panel. The light panel has a second through hole penetrating the light panel, and the first through hole is aligned with the second through hole. A support column includes a base and a support structure, the support structure extending and protruding from the base, the support structure passing through a first through hole and a second through hole, such that the back plate and the lamp panel are clamped between the base and the support structure; and An elastic element is fitted onto the support structure, with its two ends abutting against the outer side of the back plate and the base, respectively.

10. The backlight module as described in claim 9, characterized in that, Also includes: A buffer element is disposed at the top of the support structure; and A diffuser plate is disposed at a certain distance between the lamp plate and the back plate, and the diffuser plate abuts against the buffer.

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