CN214375710U - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN214375710U CN214375710U CN202023277708.1U CN202023277708U CN214375710U CN 214375710 U CN214375710 U CN 214375710U CN 202023277708 U CN202023277708 U CN 202023277708U CN 214375710 U CN214375710 U CN 214375710U
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Abstract
The utility model provides a backlight module and display device, backlight unit includes: a plurality of lamp panels which are spliced with each other; the light reflecting piece corresponds the setting of the splicing seam of two adjacent lamp plates. The light reflecting pieces are arranged at the splicing seams of the two adjacent lamp panels, so that the reflection effect of light at the splicing seams is improved, and the shadow problem at the splicing seams is improved.
Description
Technical Field
The utility model relates to a show technical field, especially relate to a backlight module and display device.
Background
At present, for a vehicle-mounted large-sized sub-millimeter light emitting diode (mini-LED) backlight module, a lamp panel of the sub-millimeter light emitting diode backlight module is usually a spliced lamp panel, that is, a plurality of lamp panels are spliced into a whole lamp panel to serve as a backlight source. Due to the limitation of the light path propagation path of the direct type backlight source, when the large-size sub-millimeter light emitting diode backlight module adopts the jointed board design, the treatment of the jointed seam generated by jointing two adjacent lamp panels is a difficult problem encountered at present, and due to the existence of the jointed seam, the light of the direct type backlight source at the jointed position is dark, and the direct type backlight source is represented as a dark shadow or a dark space in product optics, so that the visual effect is influenced.
Therefore, it is necessary to provide a technical solution to solve the problem of shadows or dark areas caused by the splicing seams when splicing the lamp panels.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a backlight module and display device to splice the shadow or the dark space problem that the seam caused when improving the lamp plate concatenation.
In order to realize the purpose, the technical scheme is as follows:
a backlight module, comprising:
a plurality of lamp panels which are spliced with each other; and
the light reflecting pieces correspond to two adjacent splicing seams of the lamp panels.
In the backlight module, one end of the light reflecting piece, which is far away from the lamp panel, is provided with a convex arc-shaped curved surface.
In the backlight module, the part of the light reflecting piece is positioned above the two adjacent lamp panels.
In the above backlight module, each of the lamp panels has a mounting surface, and each of the lamp panels includes:
the light-emitting elements are fixed on the mounting surface of each lamp panel;
the distance between one end of the light reflecting piece far away from the lamp panel and the mounting surface is smaller than or equal to 0.5 millimeter and larger than 0 millimeter.
In the above backlight module, the backlight module further includes:
the lamp panel is arranged on the back plate; and
the connecting piece sets up in adjacent two concatenation seam department between the lamp plate, and connect the reflector component with the backplate.
In the backlight module, the connecting piece, the reflecting piece and the back plate are enclosed to form a clamping groove, and two adjacent lamp panels are close to one end of the connecting piece and clamped in the clamping groove.
In the above backlight module, each of the lamp panels has a mounting surface, and each of the lamp panels includes:
the light-emitting elements are fixed on the mounting surface of each lamp panel; and the distance between one end of the reflector connected with the connecting piece and the mounting surface is 0.15-0.25 mm.
In the above backlight module, the backlight module further includes:
the inner rubber frame, the inner rubber frame set up in on the lamp plate, just the reflection of light piece with the inner rubber frame is connected.
In foretell backlight unit, the inner rubber frame has first step face and second step face, the second step face is located first step face is kept away from one side of lamp plate, backlight unit still includes:
the diffusion plate is arranged on the first step surface;
and the optical diaphragm is arranged on the second step surface.
A display device comprises the backlight module and a liquid crystal display panel, wherein the liquid crystal display panel is positioned on the light emergent side of the backlight module.
Has the advantages that: the utility model provides a backlight module and display device, backlight unit includes: a plurality of lamp panels which are spliced with each other; the light reflecting piece corresponds the setting of the splicing seam of two adjacent lamp plates. The light reflecting pieces are arranged at the splicing seams of the two adjacent lamp panels, so that the reflection effect of light at the splicing seams is improved, and the shadow problem at the splicing seams is improved.
Drawings
Fig. 1 is a schematic view of a display device according to a first embodiment of the present invention;
FIG. 2 is a schematic plan view of the reflector of FIG. 1 attached to a backing plate;
FIG. 3 is a partially enlarged schematic view of the display device shown in FIG. 1;
fig. 4 is a schematic view of a display device according to a second embodiment of the present invention;
fig. 5 is a schematic plan view of the light reflecting member shown in fig. 4 connected to the inner frame.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
First embodiment
Referring to fig. 1 to 3, fig. 1 is a schematic cross-sectional view of a display device according to a first embodiment of the present invention, fig. 2 is a schematic plan view of the light reflector shown in fig. 1 connected to a back plate, and fig. 3 is a partially enlarged schematic view of the display device shown in fig. 1. The display device 300 includes a backlight module 10 and a liquid crystal display panel 20. The display device 300 can be applied to a vehicle display, a television set, or the like. The liquid crystal display panel 20 is located on the light emitting side of the backlight module 10, the backlight module 10 is used for providing a backlight source for the liquid crystal display panel 20, and the liquid crystal display panel 20 receives the backlight and controls the transmittance of the backlight, so as to display pictures with different gray scales.
In this embodiment, the liquid crystal display panel 20 includes an array substrate, a color filter substrate, and a liquid crystal layer located between the array substrate and the color filter substrate.
In this embodiment, the backlight module 10 includes a back plate 101, a plurality of lamp panels 103, an inner frame 105, a diffusion plate 107, an optical film 109, an outer frame 111, and a reflector 113.
In the embodiment, the back plate 101 includes a bottom plate 1011 and four side plates 1012 surrounding the bottom plate 1011, and the bottom plate 1011 and the four side plates 1012 form a receiving cavity 101 a. The back plate 101 is made of aluminum alloy or plastic.
In this embodiment, the lamp panels 103 are spliced together to provide a large-sized surface light source. The plurality of lamp panels 103 are disposed in the accommodating cavity 101a of the back panel 101 and located on the bottom plate 1011. Each lamp panel 103 includes a Printed Circuit Board (PCB) 1031 and a plurality of light emitting elements 1032 arranged in an array on the PCB 1031. The printed circuit board 1031 has a mounting surface 1031a, and each light emitting element 1032 is fixed to the mounting surface 1031a of the printed circuit board 1031. The light emitting element 1032 and the printed circuit board 1031 may be connected by solder paste or by conductive paste. A reflection layer (not shown) is disposed on the mounting surface 1031a of the printed circuit board 1031 to reflect light and improve the utilization rate of light. Light emitting element 1032 is a sub-millimeter light emitting diode. It is understood that the light emitting element 1032 can also be a Micro light emitting diode (Micro-LED) or other light emitting element.
In this embodiment, the light-reflecting member 113 is disposed corresponding to the splicing seams 103a of two adjacent lamp panels 103, and the light at the splicing seams 103a is reflected by the light-reflecting member 113, so as to improve the brightness at the splicing seams 103a and improve the shadow or dark space problem at the splicing seams 103 a. The light reflecting member 113 may be made of transparent plastic to prevent light from being blocked.
One end of the light reflecting piece 113, which is far away from the lamp panel 103, is provided with a convex arc-shaped curved surface 113a, on one hand, the end, which is far away from the lamp panel 103, of the light reflecting piece 113 is a cube, and the convex arc-shaped curved surface can have a better light reflecting effect on light at the spliced seam 103 a; on the other hand, the end of the light reflector 113 far away from the lamp panel 103 is a cube, the light emitting element 1032 emits light within a specific angle range, and the arc-shaped curved surface with the protrusion can avoid shielding the light emitted from the light emitting element 1032 to the splicing seam 103 a. Specifically, in the present embodiment, one end of the light reflecting member 113 away from the lamp panel 103 has a convex arc-shaped curved surface. In other embodiments, the end of the reflector 113 away from the lamp panel 103 may also have a convex elliptic arc curve.
In this embodiment, a part of the light reflector 113 is located above two adjacent lamp panels 103, that is, the width D1 of the light reflector 113 is greater than the width of the splicing seams 103a of two adjacent lamp panels 103, so that the light reflector 113 completely covers the splicing seams 103 a. Specifically, as shown in fig. 3, the width D1 of the reflector 113 is 0.4 mm to 0.6 mm, for example, the width D1 of the reflector 113 may be 0.5 mm.
In this embodiment, the distance H1 between the end of the light reflector 113 far away from the lamp panel 103 and the mounting surface 1031a is less than or equal to 0.5 mm and greater than 0 mm, so as to avoid that the light emitted by the light emitting element 1032 is shielded due to too high height of the light reflector 113, and the light emitted by the light emitting element 1032 cannot reach the splicing seam 103 a. For example, the spacing H1 may be 0.4 millimeters, 0.3 millimeters, or 0.2 millimeters.
In this embodiment, the backlight module 10 further includes a connector 115, the connector 115 is disposed at the splicing seam 103a between two adjacent lamp panels 103, the connector 115 connects the light reflector 113 and the back panel 101, and the light reflector 113 is connected with the back panel 101 to stabilize the light reflector 113, thereby preventing the light reflector 113 from moving. The connector 115 is in the shape of a cube and the connector 115 may be comprised of plastic. The connecting member 115 and the light reflecting member 113 may be integrally molded. The width D2 of the connecting member 115 is greater than 0 and less than or equal to 0.3 mm, which is more favorable for reducing the distance between the adjacent light emitting elements 1032 respectively located on the two adjacent lamp panels 103. For example, the width of the connection member 115 is 0.1 mm.
In this embodiment, the connecting member 115, the light-reflecting member 113 and the back panel 101 enclose a slot 101a, and one ends of two adjacent lamp panels 103 close to the connecting member 115 are clamped in the slot 101a to prevent the lamp panels 103 from generating obvious displacement. The width D3 of the slot 101a is greater than or equal to 0.2 mm and less than the width of the reflector 113, so that the reflector 113 can shield the edge of the lamp panel 103 close to the splicing seam when the lamp panel 103 is clamped in the slot 101 a.
Further, the distance H2 between the end of the light reflecting member 113 connected to the connecting member 115 and the mounting surface 1031a is 0.15 mm to 0.25 mm, so as to reserve a space for facilitating the clamping of the lamp panel 103 to the clamping groove 101 a. For example, the distance H2 between the end of the light reflecting member 113 connected to the connecting member 115 and the mounting surface 1031a is 0.2 mm.
In this embodiment, the inner frame 105 is located in the accommodating cavity 101a and is disposed on the peripheral edges of the lamp panels 103. The inner rubber frame 105 is provided with a first step surface 1051, a second step surface 1052, a connecting surface 1053 and an inclined surface 1054, the second step surface 1052 is positioned on one side of the first step surface 1051 far away from the lamp panels 103, the connecting surface 1053 is connected between the first step surface 1051 and the second step surface 1052, the connecting surface 1053 is parallel to the side plate 1012 of the back plate 101, the first step surface 1051 and the second step surface 1052 are parallel to the bottom plate 1011 of the back plate 101, the inclined surface 1054 is connected with the first step surface 1051, and an included angle between the inclined surface 1054 and the first step surface 1051 is an obtuse angle. The angled surface 1054 reflects light energy. The inner rubber frame 105 is made of plastic.
In the present embodiment, the diffusion plate 107 is disposed on the first step surface 1051, and the optical film 109 is disposed on the second step surface 1052. The diffusion plate 107 is used to diffuse light emitted from the plurality of light emitting elements 1032. The optical film 109 includes, but is not limited to, a brightness enhancement film.
In this embodiment, the outer frame 111 is disposed on the back plate 101, and the outer frame 111 is fixed on the side plate 1012 of the back plate 101. The outer frame 111 has a step surface, and the liquid crystal display panel 20 is fixed to the outer frame 111 by a double-sided tape. The outer frame 111 may be made of plastic or metal.
The utility model discloses display device sets up the reflector through the concatenation seam department at two adjacent lamp plates to improve the utilization ratio of light in concatenation seam department, and then improve the luminance of concatenation seam department.
Second embodiment
As shown in fig. 4 and 5, fig. 4 is a schematic view of a display device according to a second embodiment of the present invention, and fig. 5 is a schematic plan view of the light-reflecting member shown in fig. 4 connected to the inner frame. The display device shown in fig. 4 is basically similar to the display device shown in fig. 1, the light reflecting pieces 113 are correspondingly arranged at the splicing seams 103a of two adjacent lamp panels 103, and the light reflecting pieces 113 are located on the edges of the two adjacent lamp panels 103 close to the splicing seams 103a, the difference is that the light reflecting pieces 113 are connected with the inner rubber frame 105, and the light reflecting pieces 113 cover the splicing seams 103a between the adjacent lamp panels 103 as the beams of the inner rubber frame 105.
The embodiment of the utility model provides a display device is connected with interior gluey frame through reflector, so that reflector reflects the light of splice seam department, improves the luminance of splice seam department, and then when improving the dark line or the dark space problem of splice seam department, avoids the reflector to take place the displacement. In addition, the reflector is arranged on the edges of the two adjacent lamp panels close to the splicing seam, so that the lamp panels can be prevented from moving.
The above description of the embodiments is only used to help understand the technical solution and the core idea of the present invention; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present invention in its various embodiments.
Claims (9)
1. A backlight module is characterized in that the backlight module comprises:
a plurality of lamp panels which are spliced with each other; and
the light reflecting piece corresponds adjacent two the concatenation seam setting of lamp plate, the light reflecting piece is kept away from the one end of lamp plate has bellied arc curved surface, the light reflecting piece is transparent.
2. The backlight module according to claim 1, wherein a portion of the light reflector is located above two adjacent lamp panels.
3. The backlight module according to claim 1, wherein each of the lamp panels has a mounting surface, each of the lamp panels comprising:
the light-emitting elements are fixed on the mounting surface of each lamp panel;
the distance between one end of the light reflecting piece far away from the lamp panel and the mounting surface is smaller than or equal to 0.5 millimeter and larger than 0 millimeter.
4. A backlight module according to claim 1, further comprising:
the lamp panel is arranged on the back plate; and
the connecting piece sets up in adjacent two concatenation seam department between the lamp plate, and connect the reflector component with the backplate.
5. The backlight module according to claim 4, wherein the connecting member, the light reflecting member and the back plate are enclosed to form a slot, and one ends of two adjacent lamp panels close to the connecting member are clamped in the slot.
6. The backlight module according to claim 4, wherein each of the lamp panels has a mounting surface, each of the lamp panels comprising:
the light-emitting elements are fixed on the mounting surface of each lamp panel; and the distance between one end of the reflector connected with the connecting piece and the mounting surface is 0.15-0.25 mm.
7. A backlight module according to claim 1, further comprising:
the inner rubber frame, the inner rubber frame set up in on the lamp plate, just the reflection of light piece with the inner rubber frame is connected.
8. The backlight module according to claim 7, wherein the inner rubber frame has a first step surface and a second step surface, the second step surface is located on one side of the lamp panel away from the first step surface, and the backlight module further comprises:
the diffusion plate is arranged on the first step surface;
and the optical diaphragm is arranged on the second step surface.
9. A display device, comprising the backlight module according to any one of claims 1 to 8 and a liquid crystal display panel, wherein the liquid crystal display panel is located at the light-emitting side of the backlight module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023277708.1U CN214375710U (en) | 2020-12-30 | 2020-12-30 | Backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023277708.1U CN214375710U (en) | 2020-12-30 | 2020-12-30 | Backlight module and display device |
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| Publication Number | Publication Date |
|---|---|
| CN214375710U true CN214375710U (en) | 2021-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023277708.1U Active CN214375710U (en) | 2020-12-30 | 2020-12-30 | Backlight module and display device |
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| CN (1) | CN214375710U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114488621A (en) * | 2022-03-11 | 2022-05-13 | 惠州华星光电显示有限公司 | Spliced light-emitting panel, backlight module and spliced display panel |
| WO2023173479A1 (en) * | 2022-03-16 | 2023-09-21 | 广州华星光电半导体显示技术有限公司 | Backlight module and display device |
-
2020
- 2020-12-30 CN CN202023277708.1U patent/CN214375710U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114488621A (en) * | 2022-03-11 | 2022-05-13 | 惠州华星光电显示有限公司 | Spliced light-emitting panel, backlight module and spliced display panel |
| WO2023173479A1 (en) * | 2022-03-16 | 2023-09-21 | 广州华星光电半导体显示技术有限公司 | Backlight module and display device |
| US11841524B2 (en) | 2022-03-16 | 2023-12-12 | Guangzhou China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Backlight module and display device |
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