BACKLIGHT MODULE AND DISPLAY DEVICE

Abstract

The present invention discloses a backlight module 20 and a display device 10, in which the backlight module 20 includes a splicing light panel 200, the splicing light panel 200 includes a plurality of light panels, and the plurality of light panels 210 are spliced ​​to form the splicing light panel, and a slot 250 is provided between two adjacent light panels 210, and the backlight module 20 further includes a supplementary light structure 220, the supplementary light structure 220 has a fixed end and a free end, the fixed end is fixedly connected to one of the two adjacent light panels 210, the supplementary light structure 210 covers the slot 250, and the free end is located in the other of the two adjacent light panels 210.

Description

[Technical field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS The present invention claims priority to a Chinese patent application filed on December 29, 2021, with application number CN202111635002.4 and title "Backlight module and display device", filed by the China Patent Office, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to the field of display technology, and in particular to a backlight module and a display device. [Background technology]

[0003] The description in this specification only provides background information related to the present invention, and does not necessarily constitute the prior art. Generally, large splicing screens are often used in outdoor environments, and in order to prevent the light panels from being deformed due to the influence of the environment, a safety gap is preset between adjacent light panels, and when the display device is operated, problems such as shading and dark lines occur according to the position of the safety gap.

[0004] Generally, problems such as shadows and dark lines mentioned above can be alleviated to some extent by installing a reflective sheet on the light panel on both sides of the slot, blocking the slot with the reflective sheet, and then connecting the reflective sheet to the light panel. However, there is a possibility that stress generated by deformation of the light panel will be transferred to the reflective sheet, damaging the reflective sheet or causing the light panel to become loose. Summary of the Invention [Problem to be solved by the invention]

[0005] The objective of the present invention is to provide a backlight module and a display device, in which when the splicing light panel in the backlight module is deformed and stress is generated, the stress is not applied to the light supplementary structure of the slot, so as to avoid damage to the light supplementary structure and to prevent the light supplementary structure from becoming loose relative to the splicing light panel. [Means for solving the problem]

[0006] The present invention discloses a backlight module, which includes a splicing light panel, the splicing light panel includes a plurality of light panels, and the plurality of light panels are spliced ​​to form the splicing light panel, and has a slot between two adjacent light panels, and the backlight module further includes a light supplementary structure, the light supplementary structure has a fixed end and a free end, the fixed end is fixedly connected to one light panel of the two adjacent light panels, the light supplementary structure covers the slot, and the free end is located on the other light panel of the two adjacent light panels.

[0007] The present invention further discloses a backlight module, comprising: a splicing light panel, the splicing light panel comprising a plurality of light panels, the plurality of light panels being spliced ​​together to form the splicing light panel, with a slot between adjacent light panels, the backlight module further comprising a light supplementary structure, the light supplementary structure covering the slot, the light supplementary structure having a plurality of through holes, the plurality of through holes being divided into a third through hole and a fourth through hole, each of the two adjacent light panels having a second protrusion, the third through hole being fixedly connected to the second protrusion on one of the two adjacent light panels, the fourth through hole being fixedly connected to the second protrusion on the other of the two adjacent light panels, and the material of the second protrusion is a plastic material.

[0008] The present invention further discloses a display device, which includes a display panel and a backlight module, the backlight module is installed corresponding to the display panel, and the backlight module provides backlight for the display panel, wherein the backlight module further includes a splicing light panel, the splicing light panel includes a plurality of light panels, and a plurality of light panel splicings form the splicing light panel, with a slot between adjacent light panels, the backlight module further includes a light supplementary structure, and the light supplementary structure covers the slot.

[0009] In contrast to the solution of installing a reflective sheet on the light panels on both sides of the slot, blocking the slot with the reflective sheet, and then connecting the reflective sheet with the light panel, the present invention provides light supplementation to the slot of the splicing light panel shown by installing a light supplementary structure at a position corresponding to the slot, and the light supplementary structure is fixedly connected only to one of the light panels on both sides of the slot, and is not connected to the other light panel. When the light panel is deformed, a relative movement may occur between the light supplementary structure and the other light panel, which avoids the stress of the light panel distortion being applied to the light supplementary structure and resulting in damage to the light supplementary structure. [Brief description of the drawings]

[0010] The drawings included in this specification are used to provide a further understanding of the embodiments of the present invention, which constitute a part of the specification, illustrate the embodiments of the present application, and are used to explain the principles of the present invention together with the written description. Obviously, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative labor. [Figure 1] 1 is an exploded schematic view of a display device according to an embodiment of the present invention; [Diagram 2] 1 is a cross-sectional view of a backlight module according to a first embodiment of the present invention. [Diagram 3]1 is a schematic diagram showing a first through hole and a second through hole in the light supplementary structure according to the first embodiment of the present invention being fitted into a first protrusion on a light panel; FIG. [Figure 4] FIG. 4 is an enlarged schematic view of region A in FIG. [Diagram 5] FIG. 1 is a schematic diagram of a splicing light panel according to a first embodiment of the present invention. [Figure 6] FIG. 6 is an enlarged schematic view of region A in FIG. 5. [Figure 7] FIG. 4 is a cross-sectional view of a backlight module according to a second embodiment of the present application. [Figure 8] FIG. 11 is a plan view showing the fitting of the light supplementary structure and the splicing light panel in the third embodiment of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] It should be understood that the terminology used herein and the specific structural and functional details disclosed are merely for the purpose of describing specific embodiments and are representative, however, the present invention can be specifically embodied in many permutations and should not be construed as being limited to only the embodiments described herein.

[0012] Unless otherwise specified and limited, the terms "attached", "connected" and "connected" should be understood in a broad sense, for example, may be fixedly connected, detachably connected, or integrally connected, may be mechanically connected, may be electrically connected, may be directly connected, may be indirectly connected through an intermediate medium, or may be in communication inside two elements. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific situation.

[0013] The present invention will now be described in detail with reference to the drawings and optional embodiments.

[0014] FIG. 1 is an exploded schematic diagram of a display device according to an embodiment of the present application. As shown in FIG. 1, a display device 10 is disclosed, which includes a display panel 600 and a backlight module 20, the backlight module 20 is installed corresponding to the display panel 600, and the backlight module 20 provides backlight for the display panel 600.

[0015] Specifically, the backlight module 20 includes a back panel 100 and a splicing light panel 200, the back panel 100 and the splicing light panel 200 are installed correspondingly, the display device 10 further includes an optical film sheet 300, a rubber frame 400 and a foam 500, the back panel 100, the splicing light panel 200, the optical film sheet 300, the foam 500 and the display panel 600 are installed in a stacked manner, and the rubber frame 400 is installed around the four edges of the splicing light panel 200, the optical film sheet 300, the foam 500 and the display panel 600. Here, the backlight module further includes a light-filling structure, which covers a slot between adjacent light panels and is fixedly connected to the light panels to fill the slot, and specific embodiments are described in the following three examples. EXAMPLES

[0016] As shown in FIG. 2, FIG. 2 is a cross-sectional view of a backlight module of a first embodiment of the present invention, which discloses a backlight module 20, the backlight module 20 including a splicing light panel 200, the splicing light panel 200 including a plurality of light panels 210, the plurality of light panels 210 being formed by splicing the splicing light panel 200, and having a slot 250 between two adjacent light panels 210, the backlight module 20 further including a light supplementary structure 220, the light supplementary structure 220 having a fixed end and a free end, the fixed end being fixedly connected to one of the two adjacent light panels 210, the light supplementary structure 220 covering the slot 250, and the free end being located in the other of the two adjacent light panels 210.

[0017] According to the position corresponding to the slot 250, the light supplementary structure 220 is installed to supplement the light in the slot 250 of the splicing light panel 200, and the light supplementary structure 220 is fixedly connected only to one of the light panels 210 on both sides of the slot 250, and is not connected to the other light panel 210, that is, the light supplementary structure 220 is directly delivered to the light output surface of the other light panel 210, and when the light panel 210 is deformed, a relative movement may occur between the light supplementary structure 220 and the other light panel 210, and the stress caused by the deformation of the light panel 210 is applied to the light supplementary structure 220, which avoids the damage or loosening of the light supplementary structure 220. The fixing manner between the light supplementary structure 220 and the light panel 210 may be tape or adhesive.

[0018] 3 and 4, in the present invention, a plurality of through holes are provided in the light supplementary structure 220, and the through holes are divided into a first through hole 221 and a second through hole 222, a first protrusion 211 is provided on the light panel 210, the first through hole 221 and the first protrusion 211 are fixedly connected, the second through hole 222 is fitted and connected to the first protrusion 211 on the adjacent light panel 210, and a gap is provided between the second through hole 222 and the first protrusion 211. Here, the first through hole 221 corresponds to the fixed end of the light supplementary structure 220, and the second through hole 222 corresponds to the free end of the light supplementary structure 220.

[0019] The light supplementary structure 220 has a first through hole 221, and the first through hole 221 is fixedly connected to a first protrusion 211 on one light panel 210. The light supplementary structure 220 further has a second through hole 222, and the second through hole 222 is fitted into the first protrusion 211 on the adjacent light panel 210, and a gap is provided therebetween. The gap is a safety distance, and the safety distance is a distance that changes when the light panel 210 is deformed during thermal expansion and cold contraction. Even if the light panel 210 is deformed, the first protrusion 21 on the adjacent light panel 210 can be prevented from being damaged. It can be understood that the contact of the first protrusion 211 with the hole wall of the second through-hole 222 will not cause damage to the light supplementary structure 220, and a safety distance is left in advance between the light supplementary structure 220 and the light panel 210. In addition, this corresponds to a method in which the first protrusion 211 and the first through-hole 221 are fixedly connected. Compared with the adhesive solution, there is no need to worry about adhesive overflow affecting the light panel 210. Furthermore, there is no need to connect the light supplementary structure 220 after positioning it, and it is easy to remove later, and also has an auxiliary fixing effect on the light panel.

[0020] Furthermore, the first protrusion 211 protrudes from the light supplementary structure 220 through the through hole, and the optical film sheet 300 is above the light panel 210. Therefore, when assembling the display device 10, a support pillar 213 is installed between the light panel 210 and the optical film sheet 300. When the light supplementary structure 220 is small, the first protrusion 211 is installed separately on the light panel 210 to be combined with and fixed to the light supplementary structure 220. When the light supplementary structure 220 is large, the support pillar 213 on the light panel 210 is directly used to fixedly connect the first protrusion 211 to the light supplementary structure 220.

[0021] In addition, the support pillar 213 and the light panel 210 are integrally molded, so that the connection between the light supplementary structure 220 and the light panel 210 is more solid, and by installing a plurality of the first protrusions 211, the optical film sheet 300 is directly supported, and there is no need to install an additional support portion 213 on the light panel 210.

[0022] That is, the first protrusions 211 on each light panel are provided in multiple numbers and uniformly arranged, and the multiple first protrusions 211 are provided in one-to-one correspondence with the multiple through holes. By fixedly connecting the multiple uniformly arranged first protrusions 211 and the multiple through holes, the stability of the connection is improved, and the multiple first protrusions 211 can support the optical film sheet 300 instead of the supporting portion 213 on the original light panel. Here, the first protrusions 211 may be rectangular or circular, and the through holes are provided in accordance with the first protrusions.

[0023] In addition, the height of the light supplementary structure 220 may be the same as the height of the first protrusion 211. In addition, one end of the light supplementary structure 220 away from the slot 250 is located on the same plane as one end of the first protrusion 211 away from the light panel 210, one side of the light supplementary structure 220 away from the slot 250 abuts against the optical film sheet 300, the light supplementary structure 220 is used to supplementarily support the optical film sheet 300, the first protrusion 211 is used to convert the surface support to match the light supplementary structure 220, the contact area between the first protrusion 211 and the optical film sheet 300 is shared, and the dark spot formed by the first protrusion 211 abutting and pressing against the optical film sheet 300 at the position corresponding to the first protrusion 211 of the display device 10 is avoided.

[0024] 5 and 6, the splicing light panel 200 is always spliced ​​by many light panels 210, so that the boundary position of the slot 250 appears, the light-supplying structure 220 includes a first light-supplying structure 226 and a second light-supplying structure 227 with the same thickness, the first light-supplying structure 226 covers a plurality of the slots 250 connected in sequence on the same horizontal line, the second light-supplying structure 227 covers a plurality of the slots 250 connected in sequence on the same vertical line, the first light-supplying structure 226 and the second light-supplying structure 227 are installed overlapping each other, and the sum of the thicknesses of the overlapping parts of the first light-supplying structure 226 and the second light-supplying structure 227 is equal to the thickness of the first light-supplying structure 226 or the second light-supplying structure 227. That is, the first light-supplying structure 226 and the second light-supplying structure 227 are snap-fitted.

[0025] Compared with adopting a single light-filling structure 220 in each slot 250, this solution adopts an overall light-filling structure 220, which makes the light-filling structures 220 in the entire light panel 210 less likely to fall off, and the light-filling structures 220 are connected at their intersections in an engagement manner to ensure compatibility with the display device 10, and the overlapping positions of the first light-filling structure 226 and the second light-filling structure 227 are not darkened.

[0026] The light supplementary structure 220 may be a structure having a light source itself, or may be a reflective sheet 40. The backlight module 20 of the present invention further includes a diffusion sheet 230, one end of which is fixedly connected to the light panel 210 and the other end of which can be moved between another light panel 210 in the adjacent light panel 210, the light supplementary structure 220 covers at least one row of light emitting diodes close to the slot 250 in at least one of the light panels 210, and the number of light emitting diodes covered at the end to which the diffusion sheet 230 is fixed is smaller than the number of light emitting diodes covered at the end to which the diffusion sheet 230 is not fixed.

[0027] By using the diffusion sheet 230, the light on the light panel 210 can be uniformly irradiated to the slot 250, eliminating the need for an additional lamp source. Furthermore, compared to the solution of using a reflective sheet to supplement light for the slot 250, using the diffusion sheet 230 to supplement light provides more flexible light and the cost of the diffusion sheet 230 is also lower.

[0028] Furthermore, one end where the diffusion sheet 230 and the light panel 210 are fixed is fixed by a first protrusion 211, and the first protrusion 211 blocks some of the light, so that the number of light emitting diodes covered at the end where the diffusion sheet 230 is fixed is smaller than the number of light emitting diodes covered at the end where the diffusion sheet 230 is not fixed, thereby transmitting more light to the diffusion sheet 230 and providing supplementary light to the slot position 250, thereby improving the supplementary light effect.

[0029] In addition, the diffusion sheet 230 has a diffusion cavity 231 corresponding to the position of the light emitting diode, and the diameter of the diffusion cavity 231 is larger than the diameter of the light emitting diode, i.e., a safety distance is provided between the cavity wall of the diffusion cavity 231 and the light emitting diode, and the safety distance is a predetermined distance to prevent the diffusion sheet 230 from colliding with the light emitting diode when the light panel 210 is deformed due to thermal expansion and cold contraction.

[0030] A reflective structure 232 is installed on one side of the cavity wall of the diffusion cavity 231 away from the slot 250, and the reflective structure 232 reflects the light emitted by the light emitting diode in the diffusion cavity 231 toward the slot 250, thereby further improving the light utilization rate.

[0031] In addition, a reflective sheet 240 is further installed on the diffusion sheet 230, the reflective sheet 240 blocks the slot 250, and the reflective surface of the reflective sheet 240 is attached to the side of the diffusion sheet 230 close to the slot 250, so that the diffusion sheet 230 re-reflects the light corresponding to the slot 250, thereby further improving the light utilization rate.

[0032] Furthermore, the diffusion sheet 230 simultaneously covers the light panel 210 on both sides of the slot 250, and only covers one row of light emitting diodes close to the slot 250 of the light panel 210, and a first protrusion 211 on the light panel 210 is located on the side of the light emitting diodes covered by the diffusion sheet 230 away from the slot 250, to prevent the first protrusion 211 from blocking the light emitted from the light emitting diodes. EXAMPLES

[0033] FIG. 7 is a cross-sectional view of a backlight module according to a second embodiment of the present invention. As shown in FIG. 7, unlike the first embodiment, the light-supplying structure 220 is fixedly connected to the two adjacent light panels 210 at the same time.

[0034] Specifically, the backlight module 20 includes a splicing light panel 200, which includes a plurality of light panels 210, and the plurality of light panels 210 are spliced ​​together to form the splicing light panel 200, and there is a slot 250 between adjacent light panels 210. The backlight module 20 further includes a light supplementary structure 220, which covers the slot 250, and the light supplementary structure 220 is provided with a plurality of through holes, which include a third through hole 223 and a fourth through hole 224. The backlight module 20 is disclosed in which the second protrusion 212 is formed on one of the two adjacent light panels 210, the third protrusion 223 is fixedly connected to the second protrusion 212 on one of the two adjacent light panels 210, and the fourth protrusion 224 is fixedly connected to the second protrusion 212 on the other of the two adjacent light panels 210, and the material of the second protrusion 212 is a plastic material.

[0035] Here, the third through hole 223 is tightly fitted between the second protrusion 212 on one of the two adjacent light panels 210, and the fourth through hole 224 is tightly fitted between the second protrusion 212 on the other of the two adjacent light panels 210.

[0036] Compared with the first embodiment, this solution fixes both the light supplementary structure 220 and the two light panels 210 adjacent to the slot 250, thereby ensuring the stability of the light supplementary structure 220.

[0037] Next, the second protrusion 212 is made of a plastic material. Since the plastic material has elasticity, the second protrusion 212 converts the stress generated by the deformation of the light panel 210 into elasticity, and stores it in the second protrusion 212 and does not transmit it to the light supplementary structure 220, thereby avoiding damage to the light supplementary structure 220.

[0038] Here, the second protrusion 212 has a cylindrical shape, the third through hole 223 and the fourth through hole 224 are circular through holes, and the outer diameter of the second protrusion 212 is equal to the inner diameter of the third through hole 223 and the fourth through hole 224. The cylindrical through hole fits with the cylindrical protrusion, and when it receives the stress of the light panel 210, the stress is more uniform and it is difficult to break.

[0039] The height of the light supplementary structure 220 is the same as the height of the second protrusion 212. In addition, the surface of the light supplementary structure 220 away from the slot 250 and the end of the second protrusion 212 away from the light panel 210 are located on the same plane, that is, the side of the light supplementary structure 220 away from the slot 250 abuts against the optical film sheet 300, and the light supplementary structure 220 is used to supplementarily support the optical film sheet 300 and support and replace the second protrusion 212, and the second protrusion 212 is used to support the light supplementary structure 220 in accordance with the surface thereof, thereby avoiding the dark spot formed by extrusion at the position corresponding to the second protrusion 212 of the display device 10. EXAMPLES

[0040] FIG. 8 is a plan view of the fitting of the light supplementary structure and the splicing light panel in the third embodiment of the present invention. As shown in FIG. 8, unlike the first embodiment, a notch 225 is installed at a position corresponding to the first protrusion 211 of another light panel 210 adjacent to the light supplementary structure 220 and the slot 250, the notch 225 semi-surrounds the corresponding first protrusion 211, and the notch 225 faces a position away from the slot 250.

[0041] One end of the light supplementary structure 220 is fixedly connected to the light panel, and the other end is fitted between the other light panel 210 adjacent to the slot 250 by the first protrusion 211 and the notch 225, which makes it easy to install and allows the light supplementary structure 220 to avoid the first protrusion 211 on the other light panel adjacent to the slot, preventing collision and preventing the light supplementary structure 220 from being damaged.

[0042] The above is a further detailed description of the present invention with reference to specific preferred embodiments, and the specific implementation of the present invention cannot be deemed to be limited to these descriptions alone. Those skilled in the art to which the present invention pertains may make some simple deductions or substitutions without departing from the concept of the present invention, and all of them should be considered to fall within the protection scope of the present invention.

Claims

1. a splicing light panel, the splicing light panel including a plurality of light panels, the plurality of light panels being spliced ​​together to form the splicing light panel, the splicing light panel having a slot between two adjacent light panels; Further comprising a light supplementary structure, the light supplementary structure has a fixed end and a free end, the fixed end is fixedly connected to one of the two adjacent light panels, the light supplementary structure covers the slot, and the free end is located on the other of the two adjacent light panels; A backlight module comprising:

2. The fixed end is fixedly connected to one of the light panels on two sides of the slot, and the free end is suspended on the light output surface of the other light panel; 2. The backlight module according to claim 1 .

3. A plurality of through holes are provided in the light supplementary structure, the through holes are divided into a first through hole and a second through hole, a first protrusion is provided on the light panel, and the first through hole is fixedly connected to a first protrusion on one of the two adjacent light panels; The second through hole is fitted and connected to a first protrusion on another of the two adjacent light panels, and a gap is provided between the second through hole and the first protrusion.

2. The backlight module according to claim 1 .

4. The first protrusion penetrates the through hole, and the first protrusion protrudes from the light supplementing structure.

4. The backlight module according to claim 3.

5. The backlight module further includes an optical film sheet, the optical film sheet is disposed on one side of the light output surface of the splicing light panel, and the first protrusions support the optical film sheet.

5. The backlight module according to claim 4.

6. Each of the light panels has a plurality of first protrusions, which are uniformly arranged, and the plurality of first protrusions are arranged in one-to-one correspondence with the plurality of through holes; 4. The backlight module according to claim 3.

7. The height of the light supplementary structure is the same as the height of the first protrusion; 4. The backlight module according to claim 3.

8. The light-compensating structure includes a first light-compensating structure and a second light-compensating structure having the same thickness, and the first light-compensating structure covers a plurality of the slots connected in sequence on the same horizontal line; The second light-compensating structure covers a plurality of the slots that are sequentially connected on the same straight line, The first light supplementary structure and the second light supplementary structure are disposed overlapping each other, and a sum of the thicknesses of the overlapping portions of the first light supplementary structure and the second light supplementary structure is equal to a thickness of the first light supplementary structure or the second light supplementary structure; 2. The backlight module according to claim 1 .

9. A snap fit is formed between the first light supplementary structure and the second light supplementary structure.

9. The backlight module according to claim 8.

10. The light-compensating structure is a reflective sheet; 2. The backlight module according to claim 1 .

11. A splicing light panel is provided, the splicing light panel being configured by splicing a plurality of light panels, and having a slot between adjacent light panels; The optical fiber further includes a light-supplying structure, the light-supplying structure covering the slot; The light supplementary structure has a plurality of through holes, the plurality of through holes are divided into a third through hole and a fourth through hole, and two adjacent light panels are both provided with a second protrusion; The third through hole is fixedly connected to a second protrusion on one of the two adjacent light panels; The fourth through hole is fixedly connected to a second protrusion on another of the two adjacent light panels, and the material of the second protrusion is a plastic material. A backlight module comprising:

12. The second protrusion has a cylindrical shape, the third through hole and the fourth through hole are circular through holes, and an outer diameter of the second protrusion is equal to an inner diameter of the third through hole and the fourth through hole. The backlight module according to claim 11 .

13. The display device includes a display panel and a backlight module, the backlight module is disposed corresponding to the display panel, and the backlight module provides backlight for the display panel; Wherein, the backlight module further includes a splicing light panel, the splicing light panel includes a plurality of light panels, the plurality of light panels are formed by splicing the splicing light panel, and have a slot between adjacent light panels; the backlight module further includes a light supplementary structure, the light supplementary structure covers the slot; The light supplementary structure has a fixed end and a free end, the fixed end is fixedly connected to one of the two adjacent light panels, and the free end is located on the other of the two adjacent light panels; A display device comprising:

14. The light supplementary structure has a plurality of through holes, the plurality of through holes are divided into a third through hole and a fourth through hole, and two adjacent light panels are both provided with a second protrusion; The third through hole is fixedly connected to a second protrusion on one of the two adjacent light panels; The fourth through hole is fixedly connected to a second protrusion on another of the two adjacent light panels, and the material of the second protrusion is a plastic material; wherein the second protrusion converts stress generated by the deformation of the light panel into elasticity, so that the stress is stored in the second protrusion and is not transmitted to the light supplementary structure; 14. The display device according to claim 13.

Images