Backlight module capable of reducing width of central frame of double screens and display device

Abstract

The utility model relates to a backlight module capable of reducing the width of a central frame of double screens and a display device. The frame structure defines an X axis, a Y axis and a Z axis which are perpendicular to one another, the frame structure comprises a partition piece, the partition piece is arranged on the back plate and provided with a bottom plate and a vertical plate, the vertical plate is fixed to the bottom plate in the Z-axis direction, the vertical plate is provided with two surfaces deviating from one another, and the two surfaces are each provided with a plurality of clamping and fixing structures; the clamping structures are arranged on the vertical plate in a protruding mode and arranged at intervals in the Y-axis direction, the two front frames are installed on the two sides of the vertical plate in the Z-axis direction respectively, each front frame is clamped on the adjacent vertical plate, the back plate and the two front frames jointly form two containing spaces, and the two containing spaces are located on the two sides of the vertical plate. The plurality of light guide plates are respectively arranged in the two accommodating spaces; and a plurality of light emitting elements disposed adjacent to the plurality of light guide plates.

Description

[0001] This application claims the priority of a Chinese patent application with the application number 202311283712.4, titled "Multi-screen Backlight Module with Separator and Display Device", filed on October 7, 2023, and a Chinese patent application with the application number 202410447438.8, titled "Backlight Module and Display Device Capable of Narrowing the Width of the Central Border of a Dual Screen", filed on April 15, 2024. The entire contents of these two applications are incorporated herein by reference in their entirety into this application. Technical Field

[0002] The present utility model relates to a backlight module and a display device, in particular to a backlight module and a display device capable of narrowing the width of the central border of a dual screen. Background Art

[0003] In the trend of automotive intelligence, in order to meet the design requirements of having different display functions on the same display plane, multiple backlight modules need to be combined in a splicing manner to achieve the function of displaying multiple images on the same plane.

[0004] In the current technology, multi-screen display images are usually fabricated by die-casting processes. The existing die-cast backplane structure has its forming limitations, restricting the size of the dual-screen interval, resulting in a large gap between adjacent backlight modules, causing obvious dark areas between the backlight modules and making the cross-module images visually discontinuous. Summary of the Utility Model

[0005] Therefore, the purpose of the present utility model is to provide a backlight module and a display device capable of narrowing the width of the central border of a dual screen, and this backlight module can improve visual continuity.

[0006] According to the purpose of the present utility model, there is provided a backlight module capable of narrowing the width of the central border of a dual screen, including a backplane; a frame structure that defines mutually perpendicular X-axis, Y-axis, and Z-axis. The frame structure includes a separator that is disposed on the backplane and has a bottom plate and a vertical plate. The vertical plate is fixed to the bottom plate along the Z-axis direction. The vertical plate has two surfaces facing away from each other, and both surfaces have a plurality of fastening structures. These fastening structures protrude from the vertical plate and are spaced along the Y-axis direction. Two front frames are respectively installed on both sides of the vertical plate along the Z-axis direction, and each front frame is fastened to the adjacent vertical plate. The backplane and the two front frames together form two accommodation spaces, and these two accommodation spaces are located on both sides of the vertical plate; a plurality of light guide plates are respectively disposed in the two accommodation spaces; and a plurality of light-emitting elements are disposed adjacent to the plurality of light guide plates.

[0007] In some embodiments, the fastening structures on the two surfaces are staggered along the Y-axis direction.

[0008] In some embodiments, each front frame includes two first sidewalls arranged in parallel along the X-axis direction, a second sidewall and a third sidewall arranged in parallel along the Y-axis direction. Each first sidewall is connected to the same side of the second sidewall and the third sidewall, and the second sidewall is clamped to the adjacent vertical plate.

[0009] In some embodiments, the back plate includes two outer walls arranged in parallel along the X-axis direction, and the two outer walls are arranged corresponding to each other. The first sidewalls of each front frame are arranged on the outer side surfaces of the outer walls of the back plate. The two outer walls respectively have openings. The two ends of the second sidewall of each front frame are respectively located in these openings, and a light-shielding member is provided to cover each opening.

[0010] In some embodiments, the second sidewall of each front frame has a plurality of fixing holes, which are respectively clamped to a plurality of clamping structures of the vertical plate.

[0011] In some embodiments, the first sidewall of each front frame has a plurality of outer clamping holes, and a plurality of outer clamping buckle structures are provided on the outer side surfaces of the two outer walls of the back plate. The plurality of outer clamping holes are respectively clamped to the plurality of outer clamping buckle structures.

[0012] In some embodiments, the material of the back plate and the partition member of the frame structure is metal, and these clamping structures are formed by stamping.

[0013] In some embodiments, the frame structure further has a flat plate provided on the back plate, and the vertical plate is located between the bottom plate and the flat plate.

[0014] Another object of the present invention is to provide a display device, including the backlight module capable of reducing the width of the central border of the dual screens as described above, and two display panels, which are provided above the frame structure.

[0015] In some embodiments, it further includes a glass cover plate, which is provided above these display panels. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the above and other objects, features, advantages and embodiments of the present invention more understandable, the drawings are described as follows.

[0017] Figure 1 It is a schematic diagram of the backlight module capable of reducing the width of the central border of the dual screens of the present invention.

[0018] Figure 2 It is an exploded view of the components of the first embodiment of the backlight module capable of reducing the width of the central border of the dual screens of the present invention.

[0019] Figure 3 It is a partially enlarged view of the frame structure of the first embodiment of the backlight module capable of reducing the width of the central border of the dual screens of the present invention.

[0020] Figure 4 yes Figure 1 A partial enlarged view of the part marked with A.

[0021] Figure 5A It is an exploded view of components of the second embodiment of the backlight module of the utility model which can reduce the width of the central frame of the dual screens.

[0022] Figure 5B yes Figure 5A The second embodiment is shown in a cross-sectional view after being assembled.

[0023] Figure 6 It is an exploded view of components of the display device of the present utility model. DETAILED DESCRIPTION

[0024] The directions "front", "back", "up", "down", "left", "right" and so on involved in this article are only for the convenience of understanding the present invention. The present invention is not limited to these directions, but can be adjusted according to actual conditions. The present invention is described with the Z-axis direction as the up-down direction, the X-axis direction as the left-right direction, and the Y-axis direction as the front-back direction.

[0025] In order to clearly illustrate the specific implementation, structure and effects achieved by the present invention, embodiments are provided below and described in conjunction with the accompanying drawings.

[0026] See also Figures 1 to 3 , depicts a backlight module 100 capable of reducing the width of the central border of a dual screen, the backlight module 100 having a back plate 21, a frame structure 20, two light guide plates 26 and a plurality of light emitting elements 28. The backlight module 100 can be a direct-lit backlight module or an edge-lit backlight module.

[0027] The frame structure 20 defines an X-axis, a Y-axis, and a Z-axis that are perpendicular to each other. The frame structure 20 includes a partition 23 disposed on the back plate 21. The partition 23 has a bottom plate 231 and a vertical plate 232. The bottom plate 231 is disposed above the back plate 21. The vertical plate 232 is fixed to the middle position of the bottom plate 231 along the Z-axis direction. The vertical plate 232 has two surfaces that are away from each other along the X-direction (i.e., the left surface and the right surface of the vertical plate). Both surfaces are provided with a plurality of fixing structures 232a. These fixing structures 232a are protruded from the vertical plate 232 and are spaced apart along the Y-axis direction. These fixing structures 232a are staggered along the Y-axis direction to prevent the fixing structures 232a located on the same side from being too dense and affecting the structural strength of the vertical plate 232.

[0028] Two front frames 25 are respectively installed on the left and right sides of the vertical plate 232 along the Z-axis direction. In the backlight module 100 disclosed in this embodiment, the vertical plate 232 has two surfaces facing away from each other, and both surfaces have a plurality of fastening structures 232a. These fastening structures 232a protrude from the vertical plate 232 and are arranged at intervals along the Y-axis direction. That is to say, these fastening structures 232a are of double-sided tenon design and can be respectively fastened to the two front frames 25 to complete the assembly and positioning of the two front frames 25. At the same time, the vertical plate 232 is located between the two light guide plates 26, which can effectively block light leakage and solve the problem that the corresponding side edges between the light guide plates 26 are prone to light leakage.

[0029] Each front frame 25 includes two first side walls 251 arranged in parallel along the X-axis direction, and a second side wall 252 and a third side wall 253 arranged in parallel along the Y-axis direction. Each first side wall 251 is connected to the same side of the second side wall 252 and the third side wall 253. The second side wall 252 has a plurality of fixing holes 252a. The fastening structures 232a on the left and right sides of the vertical plate 232 are engaged with the corresponding fixing holes 252a on the second side wall 252 of the adjacent vertical plate 232, so that the back plate 21 and the two front frames 25 form accommodation spaces on the left and right sides of the vertical plate 232 respectively. The two light guide plates 26 are respectively arranged in the two accommodation spaces along the XY plane, and a plurality of light-emitting elements 28 are arranged adjacent to the light guide plates 26. In the embodiment of the present invention, the light-emitting elements 28 are arranged on the front and rear sides of the light guide plate 26, and the light-emitting elements 28 and the light guide plate 26 are used to refract the light source by the backlight module 100. Since the fastening structures 232a of the vertical plate 232 are staggered with each other, in the state of only lighting the light-emitting elements 28 on one side, the light leakage can be effectively blocked by the front frame 25 and the vertical plate 232 at the same time, and the problem that the corresponding side edges between the light guide plates 26 are prone to light leakage can be solved. Therefore, the light will not leak to the other screen to affect recognition and cause accidental touch, and the contrast at the central docking part of the double screen is improved accordingly. In the embodiment of the present invention, the number of the light guide plates 26 is equal to the number of the accommodation spaces, but the present invention is not limited thereto.

[0030] Please refer to Figure 4, the back plate 21 includes two outer side walls 211 arranged in parallel along the X-axis direction, and the two outer side walls 211 are arranged corresponding to each other. The first side wall 251 of each front frame 25 is correspondingly arranged on the outer side surface of the outer side wall 211 of the back plate 21, and each outer side wall 211 has an opening 29. Since there is still an easy light leakage problem at the corners when each front frame 25 is combined with the partition member 23 and the back plate 21, therefore, in this embodiment, both ends of the second side wall 252 of the front frame 25 are located within these openings 29, and then a light-shielding member 31 is used to cover each opening 29, thereby avoiding light leakage from each opening 29. The light-shielding member 31 can be a black rubber strip or a black adhesive tape, and its shape is designed as a U shape, which can block light leakage from three sides, but the present invention is not limited thereto.

[0031] Furthermore, each first side wall 251 of the front frame 25 has a plurality of outer engaging holes 251a, and a plurality of outer snap structures 211a are provided on the outer side surfaces of the two outer side walls 211 of the back plate 21. These outer snap structures 211a are engaged with these outer engaging holes 251a, making the combination of the front frame 25 and the back plate 21 more stable and not easily deformed.

[0032] In an embodiment of the present invention, the materials of the back plate 21 and the partition member 23 of the frame structure 20 are metals. The back plate 21 and the partition member 23 of the frame structure 20 can be formed by stamping ultra-thin sheet metal, thereby reducing the overall weight and volume of the backlight module 100 and reducing the manufacturing cost. Taking this embodiment as an example, the thickness of the back plate 21 is greater than the thickness of the partition member 23, and then the back plate 21 and the partition member 23 are combined together by riveting. Since the thickness of the partition member 23 is relatively thin, a more complex structure (that is, these clamping structures 232a on the vertical plate 232) can be formed on the partition member 23, thereby reducing the forming difficulty. At the same time, the width design of the vertical plate 232 of the partition member 23 can also be adjusted according to the optical architectures on the left and right sides. In addition, due to the ultra-thin characteristic of the partition member 23, the distance between the two sides of the vertical plate 232 of the partition member 23 can be reduced. When installing the display panel 40, the dark areas on both sides of the display panel 40 can be reduced, improving the problem of visual continuity and maintaining a better optical taste.

[0033] Please refer to Figure 5A and 5B, showing a second embodiment of the backlight module 100 capable of reducing the width of the central border of the double screen of the present utility model. In the second embodiment, the vertical plate 232 of the separator 23 can be fixed to the right end of the bottom plate 231 along the Z-axis direction, and the flat plate 24 is arranged on the right side of the vertical plate 232, thus forming a state where the vertical plate 232 is between the bottom plate 231 and the flat plate 24. In the second embodiment, the separator 23 is L-shaped, and by arranging the flat plate 24, the flat plate 24 and the bottom plate 231 of the separator 23 are at the same height, so that the light guide plate 26 located in the accommodation space can be arranged at the same height position for light refraction. Or, by adjusting the thickness of the backlight module 100 on the left and right sides, different thickness light guide plates 26 can be matched, so that different optical characteristics or different images can be displayed on the left and right sides of the backlight module 100.

[0034] Further explanation, in the first embodiment and the second embodiment of the present utility model, the backlight module 100 capable of reducing the width of the central border of the double screen further includes a plurality of optical films 27 respectively arranged above the two light guide plates 26 in the accommodation space. Due to the blocking of the front frame 25 and the vertical plate 232, the light output from the light-emitting surface of the optical film 27 can be prevented from affecting the adjacent light-emitting surface. The optical film 27 can include a diffusion film or a prism film, but the present utility model is not limited thereto.

[0035] Please refer to Figure 6 , showing a display device 200, having two display panels 40 arranged above the frame structure 20, and a glass cover plate 50 arranged above these display panels 40, wherein the two display panels 40 are arranged corresponding to the positions of the two accommodation spaces formed by the back plate 21 and the two front frames 25 on the left and right sides of the vertical plate 232. By using the separator 23 made of ultra-thin sheet metal, the dark area between the two display panels 40 can be reduced, the problem of visual discontinuity between the two display images can be improved, and better optical taste can be maintained.

[0036] The backlight module 100 and the display device 200 of the present utility model have a separator 23 made of ultra-thin sheet metal. The separator 23 is arranged between two adjacent light guide plates 26 on the back plate 21, which can not only effectively block light to avoid the side light of the two light guide plates 26 interfering with each other and affecting the light output effect, but also achieve the effect of an extremely narrow border, reduce the dark area between the two display panels 40, improve the problem of visual discontinuity between the two display images, and enhance the overall display effect.

[0037] The backlight module 100 and the display device 200 of the present utility model can be applied to products with multi-screen displays. For example, in large-sized vehicle-mounted displays, if the display screens of the center console and the instrument panel are integrated into the same display device, the frame widths at the intervals between the two screens and at the docking position in the middle of the two screens are made smaller and smaller. In response to this trend, the present utility model can use the partition 23 of the present utility model to separate the light below the display screens of the center console and the instrument panel, so as to minimize the black edges (i.e., dark areas) between the two modules, achieve the maximum screen-to-body ratio, and at the same time ensure that each module can operate independently without mutual influence. Furthermore, the backlight module 100 disclosed in the present utility model is applicable to both edge-lit models and direct-lit models. Subsequent applications not only correspond to dual screens, but can also be used for the narrow bezel design of multi-screen models. In addition, the partition 23 of the back plate 21 and the frame structure 20 can also be formed by stamping, which can reduce the product weight, volume and unit price.

[0038] Although the present utility model is disclosed above in various embodiments, it is not intended to limit the present utility model. Any person with ordinary knowledge in the technical field to which the present utility model pertains should be able to make some modifications and refinements without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model should be defined by the scope defined in the appended claims.

[0039]

List of Reference Numerals

[0040] 100: Backlight module

[0041] 200: Display device

[0042] 20: Frame structure

[0043] 21: Back plate

[0044] 211: Outer wall

[0045] 211a: Outer snap structure

[0046] 23: Partition

[0047] 231: Bottom plate

[0048] 232: Vertical plate

[0049] 232a: Fixing structure

[0050] 24: Flat plate

[0051] 25: Front frame

[0052] 251: First side wall

[0053] 251a: Outer engaging hole

[0054] 252: Second side wall

[0055] 252a: Fixed hole

[0056] 253: Third side wall

[0057] 26: Light plate

[0058] 27: Optical film

[0059] 28: Light-emitting element

[0060] 29: Opening

[0061] 31: Light-shielding member

[0062] 40: Display panel

[0063] 50: Glass cover plate.

Claims

1. A backlight module capable of reducing the width of the central border of a dual screen, characterized in that: Include: Back panel; The frame structure defines mutually perpendicular X-axis, Y-axis and Z-axis and includes: A separator, which is disposed on the back plate and has a bottom plate and a vertical plate, the vertical plate is fixed to the bottom plate along the Z-axis direction, the vertical plate has two surfaces away from each other, the two surfaces both have a plurality of fixing structures, the plurality of fixing structures are protruded from the vertical plate and are spaced apart along the Y-axis direction; as well as Two front frames, which are respectively installed on both sides of the vertical plate along the Z-axis direction, each of the front frames is clamped on the vertical plate adjacent to it, and the back plate and the two front frames together form two accommodating spaces, and the two accommodating spaces are located on both sides of the vertical plate; A plurality of light guide plates, which are respectively disposed in the two accommodating spaces; as well as A plurality of light emitting elements are disposed adjacent to the plurality of light guide plates.

2. The backlight module capable of reducing the width of the central border of the dual screens according to claim 1, characterized in that: The multiple fastening structures located on the two surfaces are staggered along the Y-axis direction.

3. The backlight module capable of reducing the width of the central border of the dual screens according to claim 1, characterized in that: Each of the front frames includes two first side walls arranged in parallel along the X-axis direction and a second side wall and a third side wall arranged in parallel along the Y-axis direction. Each first side wall is connected to the same side of the second side wall and the third side wall, and the second side wall is clamped to the adjacent vertical plate.

4. The backlight module capable of reducing the width of the central border of the dual screens according to claim 3, characterized in that: The back plate includes two outer walls arranged in parallel along the X-axis direction, and the two outer walls are arranged corresponding to each other, the first side wall of each front frame is arranged on the outer side surface of each outer wall of the back plate, the two outer walls respectively have openings, the two ends of the second side wall of each front frame are respectively located in these openings, and a shading member is provided to cover each opening.

5. The backlight module capable of reducing the width of the central border of the dual screens according to claim 3, characterized in that: The second side wall of each of the front frames has a plurality of fixing holes, which are respectively engaged with the plurality of fixing structures of the vertical plate.

6. The backlight module capable of reducing the width of the central border of the dual screens according to claim 4, characterized in that: The first side wall of each of the front frames has a plurality of outer snap-in holes, and the outer surfaces of the two outer side walls of the back plate have a plurality of outer snap-in structures, and the plurality of outer snap-in holes are respectively snap-in engaged with the plurality of outer snap-in structures.

7. The backlight module capable of reducing the width of the central border of dual screens according to claim 1, characterized in that: The back plate and the partition of the frame structure are made of metal, and the plurality of fastening structures are formed by stamping.

8. The backlight module capable of reducing the width of the central border of dual screens according to claim 1, characterized in that: The frame structure also has a flat plate arranged on the back plate, and the vertical plate is between the bottom plate and the flat plate.

9. A display device, characterized in that: Include: A backlight module capable of reducing the width of the central border of a dual screen according to any one of claims 1 to 8; and Two display panels are arranged above the frame structure.

10. The display device according to claim 9, characterized in that: The device also includes a glass cover plate, which is disposed above the two display panels.

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