CN214751226U - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN214751226U CN214751226U CN202120528634.XU CN202120528634U CN214751226U CN 214751226 U CN214751226 U CN 214751226U CN 202120528634 U CN202120528634 U CN 202120528634U CN 214751226 U CN214751226 U CN 214751226U
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Abstract
The present disclosure provides a backlight module and a display device, the backlight module includes: the backlight module comprises a back plate, an optical film material, a light bar assembly and a reflector plate, wherein the light bar assembly is arranged on one side surface of the back plate facing the optical film material and comprises a plurality of light bars and at least one light bar conversion plate connected with the light bars, each light bar is provided with a plurality of light beads, and the light bar conversion plate is provided with a plurality of terminals; the reflective sheet includes: the first reflector plate is attached to one side surface of the back plate facing the optical film material and at least covers the light bar, a lamp bead avoiding opening and a terminal avoiding opening are formed in the first reflector plate, the lamp bead penetrates through the lamp bead avoiding hole, and the terminal avoiding opening is opposite to the terminal; the second reflector plate is fixed on one side, far away from the back plate, of the light bar conversion plate, and the second reflector plate is overlapped with the orthographic projection of the light bar conversion plate on the back plate so as to shield the terminal to avoid the opening. The backlight module and the display device can solve the problem of image shadows caused by the lamp strip adapter plate terminal in the backlight module.
Description
Technical Field
The utility model relates to a show technical field, especially relate to a backlight module and display device.
Background
The development trend of the display product field such as television and the like at present is light weight, thin, intelligent, high-definition, customized and large-size. With the improvement of living standard, the demand of consumers for large-sized display products is more and more vigorous, and the requirements on the appearance and the picture display quality of the display products are higher and higher.
In the related art, in the backlight module of the direct type multi-partition local light control liquid crystal display product, a back plate and an optical film material are arranged oppositely, a plurality of light bars are assembled on one side of the back plate facing the optical film material, reflecting sheets are attached to the light bars and are positioned in gaps between the adjacent light bars and gaps between lamp beads on the light bars and used for reflecting light rays. For large-size display products, the lamp strips are spliced through the lamp strip adapter plate, the lamp strip adapter plate terminal is large, and the reflector plate is provided with a position avoiding hole in the corresponding area of the lamp strip adapter plate terminal, so that the image can generate shadows.
SUMMERY OF THE UTILITY MODEL
The embodiment of the disclosure provides a backlight module and a display device, which solve the problem of image shadows caused by a lamp strip adapter plate terminal in a large-size direct type multi-partition local light control backlight module.
The technical scheme provided by the embodiment of the disclosure is as follows:
the embodiment of the present disclosure provides a backlight module, including: the backlight module comprises a back plate, an optical film material, a light bar assembly and a reflector plate, wherein the back plate and the optical film material are oppositely arranged, the light bar assembly is arranged on one side surface of the back plate facing the optical film material, the light bar assembly comprises a plurality of light bars and at least one light bar conversion plate connected with the light bars, a plurality of lamp beads arranged at intervals are arranged on each light bar, and a plurality of terminals are arranged on the light bar conversion plate; the reflective sheet includes:
the first reflector plate is attached to one side surface of the back plate facing the optical film material and at least covers the light bar, a light bead avoiding opening and a terminal avoiding opening are formed in the first reflector plate, the light bead penetrates through the light bead avoiding hole, and the terminal avoiding opening is opposite to the terminal;
the second reflector plate is fixed on one side, far away from the back plate, of the light bar conversion plate, and the orthographic projection of the second reflector plate on the back plate is overlapped with the orthographic projection of the light bar conversion plate on the back plate so as to shield the terminal avoiding opening.
Illustratively, the first reflector plate is formed by splicing at least two sub-reflector plates, and at least one of the at least two sub-reflector plates is provided with the terminal avoiding opening.
Illustratively, the overlapped part of each second reflection sheet and the first reflection sheet is a splicing area of the second reflection sheet and the first reflection sheet, and the width of the splicing area is 5-20 mm.
For example, the number of the second reflective sheets is the same as the number of the light bar conversion plates, and one second reflective sheet correspondingly shields one light bar conversion plate.
Illustratively, the second reflector plate comprises a second reflective surface facing away from the back plate, and the second reflective surface is provided with a first dot structure.
Illustratively, the first dot structure comprises a black screen printing dot; the mesh point diameter of the first mesh point structure is 1.3 +/-1 mm.
Illustratively, the second reflective sheet is fixed on the light bar conversion plate and/or the first reflective sheet by double-faced adhesive.
Illustratively, the back panel includes a bottom panel and a plurality of side panels surrounding the bottom panel; the first reflector plate comprises a middle area attached to the area corresponding to the bottom plate and a peripheral area attached to the area corresponding to the side plates, wherein the peripheral area is provided with a second lattice point structure.
Illustratively, the dot diameter of the second dot structure gradually increases from the side of the peripheral region close to the intermediate region to the side of the peripheral region far from the intermediate region.
The embodiment of the present disclosure further provides a display device, which includes the backlight module as described above.
The beneficial effects brought by the embodiment of the disclosure are as follows:
the backlight module and the display device provided by the embodiment of the disclosure, the reflector plate in the backlight module comprises a first reflector plate and at least one second reflector plate, wherein the second reflector plate covers one side of the first reflector plate far away from the back plate to cover the light bar conversion plate and is used for shielding the light bar conversion plate terminal on the first reflector plate to avoid the opening, so that the display picture can be more uniform, and the shadow phenomenon caused by the light bar conversion plate is improved.
Drawings
Fig. 1 is a schematic view illustrating an assembly structure of a reflective sheet in a backlight module according to an exemplary embodiment of the disclosure;
fig. 2 is a schematic structural view illustrating a back plate and a light bar in a backlight module according to an exemplary embodiment of the disclosure;
fig. 3 is a schematic structural diagram illustrating a backlight module according to an exemplary embodiment of the present disclosure after a back plate and a reflector are assembled;
FIG. 4 shows a cross-sectional view taken along line E-E of FIG. 3;
fig. 5 is a schematic structural view illustrating a light bar conversion plate in a backlight module according to an exemplary embodiment of the disclosure;
fig. 6 is a schematic structural view illustrating a light bar conversion plate and a second reflector in a backlight module according to an exemplary embodiment of the disclosure after assembly;
fig. 7 is a schematic structural diagram of a first sub-reflector in a backlight module provided in an exemplary embodiment of the disclosure;
fig. 8 is a schematic structural diagram of a second sub-reflector in a backlight module provided in an exemplary embodiment of the disclosure;
fig. 9 is a schematic structural diagram of a second reflective sheet in a backlight module provided in an exemplary embodiment of the disclosure;
fig. 10 is a structural sectional view along direction F-F in fig. 3 of a backlight module provided in an exemplary embodiment of the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
Before the detailed description of the backlight module and the display device provided by the embodiments of the present disclosure, the following description is necessary for the related art:
in the related art, in the backlight module of the direct type multi-partition local light control liquid crystal display product, a back plate and an optical film material are arranged oppositely, a plurality of light bars are assembled on one side of the back plate facing the optical film material, reflecting sheets are attached to the light bars and are positioned in gaps between the adjacent light bars and gaps between lamp beads on the light bars and used for reflecting light rays. For the large-size display product, the lamp strip is not long enough, and the lamp strip adapter plate needs to be spliced, the terminals of the lamp strip adapter plate are distributed on two opposite sides of the lamp strip adapter plate, the terminals are large, and the reflecting sheet needs to be provided with holes in the corresponding areas of the terminals of the lamp strip adapter plate in a position avoiding mode, so that the lamp strip adapter plate can generate image shadows in the corresponding areas of the lamp strip adapter plate.
The backlight module and the display device provided by the embodiment of the disclosure can solve the problem of image shadows caused by the lamp strip adapter plate terminals in a large-size direct type multi-partition local light control backlight module.
As shown in fig. 1 to 10, a backlight module provided by the embodiment of the present disclosure includes: the backlight module comprises a back plate 100, an optical film material 200, a light bar assembly 300 and a reflector plate 400, wherein the back plate 100 and the optical film material 200 are arranged oppositely, the light bar assembly 300 is arranged on one side surface of the back plate 100 facing the optical film material 200, the light bar assembly 300 comprises a plurality of light bars 310 and at least one light bar conversion plate 320 connected with the light bars 310, a plurality of light beads 311 arranged at intervals are arranged on each light bar 310, and a plurality of terminals 321 are arranged on the light bar conversion plate 320; the reflective sheet 400 includes: the first reflector 410 is attached to one side surface of the back plate 100 facing the optical film material 200 and at least covers the light bar 310, the first reflector 410 is provided with a light bead avoiding opening 411 and a terminal avoiding opening 412, the light bead 311 penetrates through the light bead avoiding opening 411, the terminal avoiding opening 412 is opposite to the terminal 321, and the terminal 321 is located in the terminal avoiding opening 412; the second reflective sheet 420 is fixed on a side of the light bar conversion plate 320 far from the back panel 100, and an orthographic projection of the second reflective sheet 420 on the back panel 100 coincides with an orthographic projection of the light bar conversion plate 320 on the back panel 100, so as to shield the terminal escape opening 412.
In the above scheme, the reflective sheet 400 in the backlight module includes a first reflective sheet 410 and at least one second reflective sheet 420, wherein the second reflective sheet 420 covers a side of the first reflective sheet 410 away from the back plate 100 to cover the light bar conversion plate 320, and is used for shielding the terminal avoiding opening 412 of the light bar conversion plate 320 on the first reflective sheet 410, so that a display image can be more uniform, and a shadow phenomenon caused by the light bar conversion plate 320 can be improved.
It should be noted that, in some exemplary embodiments, the bead avoiding opening 411 may be one of a square hole or a round hole. For example, the light bar 310 is a refractive lens, and the bead avoiding opening 411 may be a circular hole; the light bar 310 is a reflective lens, and the lamp bead avoiding opening 411 may be a square hole. The first reflective sheet 410 is positioned by the size limitation of the bead 311 and the bead avoiding opening 411.
In addition, in the related art, since the LED lamps on the light bar 310 generate heat obviously, the reflector 400 above the back plate 100 expands to generate stress at high temperature, so as to cause warpage, and the problem of uneven brightness distribution of the display screen due to the change of the reflection intensity of light at the warped position of the reflector 400 affects the viewing experience of consumers, and may cause customer complaints in the market seriously, resulting in huge losses of companies; in addition, the lamp beads 311 on the lamp strip 310 need to penetrate through the lamp beads of the reflector plate 400 to avoid the opening 411 to emit light, the size is large, the number of the lamp beads 311 is large, the assembly of the reflector plate 400 is required to be very accurate, the deviation can cause the interference between the reflector plate 400 and the lamp beads 311 or the edge of the back plate 100, the reflector plate 400 of the backlight module in the related art is integrally cut, the large-size reflector plate 400 is often reworked abnormally due to the fact that the assembly is not in place during assembly of a production line, the production efficiency is influenced, and the manufacturing cost is increased.
In order to solve the above problem, in some exemplary embodiments, as shown in fig. 1 to 3, the first reflective sheet 410 is formed by splicing at least two sub-reflective sheets, and at least one of the sub-reflective sheets of the at least two sub-reflective sheets is provided with the terminal avoiding opening 412.
By adopting the above scheme, the first reflection sheet 410 can be formed by splicing at least two sub-reflection sheets, for example, as shown in fig. 1 to 3, the first reflection sheet 410 is formed by splicing a first sub-reflection sheet 410a and a second sub-reflection sheet 410b, which are respectively fixed on the left side and the right side of the back plate 100 and combined into an integral reflection sheet, so that the stress generated by the high-temperature expansion of the first reflection sheet 410 can be eliminated, and the phenomenon of uneven picture generated by the expansion and warping of the reflection sheet 400 can be prevented, in addition, the first reflection sheet 410 is formed by splicing at least two sub-reflection sheets, thereby being convenient for assembly, improving the production efficiency and reducing the abnormal rework cost.
In some exemplary embodiments, the overlapped portion of each of the second reflective sheets 420 and the first reflective sheet 410 is a splicing area of the second reflective sheet 420 and the first reflective sheet 410, and the width of the splicing area is 5-20 mm, so that stress generated by high-temperature expansion of the first reflective sheet and the second reflective sheet can be effectively released. The width of the splicing region refers to a width of the splicing region in a direction perpendicular to a length extending direction of each light bar conversion plate, and the width may be a width of the second reflection sheet.
In addition, in some exemplary embodiments, the first reflective sheet 410 is adhered to the rear panel 100 by a spray process or a double-sided tape.
It should be noted that the number of the light bar conversion plates 320 may be one or more, the number of the second reflective sheets 420 is the same as the number of the light bar conversion plates 320, and one or more second reflective sheets 420 correspondingly shield one light bar conversion plate 320. Fig. 5 is a schematic structural diagram of a light bar conversion plate.
In addition, as shown in fig. 4, since at least a portion of the terminal 321 on the light bar conversion plate 320 extends out of the terminal avoiding opening 412, the second reflective sheet 420 is fixed on a side of the light bar conversion plate 320 away from the back plate 100, that is, the second reflective sheet 420 is overlapped on the first reflective sheet 410, so that if a second reflective surface of the second reflective sheet 420 facing away from the back plate 100 is a smooth surface, light in an area where the second reflective sheet 420 is located may be too strong, which may cause bright lines. Therefore, in some exemplary embodiments, as shown in fig. 8, a first dot structure 423 is disposed on a second reflective surface of the second reflective sheet 420 facing away from the back plate 100, and the first dot structure 423 is used for reducing the reflective strength of the second reflective surface.
As an exemplary embodiment, the first dot structure 423 may be a black screen printing dot, and of course, other dot structures capable of reducing the reflective strength may also be used. And the dot diameter size of the first dot structure 423 is not limited, as an exemplary embodiment, the dot diameter of the first dot structure 423 is 1.3 ± 1 mm.
In addition, in some exemplary embodiments, as shown in fig. 4, 9 and 10, the second reflective sheet 420 is adhesively fixed to the light bar conversion plate 320 by a double-sided adhesive tape 422, wherein the double-sided adhesive tape 422 may be an area adhered between two opposite side terminals 321 of the light bar conversion plate 320.
In other exemplary embodiments, the second reflective sheet 420 may be fixed on the first reflective sheet 410 by double-sided adhesive tape according to practical application scenarios.
Further, in some exemplary embodiments, the back plate 100 includes a bottom plate and a plurality of side plates surrounding the bottom plate; as shown in fig. 7 to 8, the first reflector 410 includes a middle area a attached to the area corresponding to the bottom plate and a peripheral area B attached to the areas corresponding to the side plates, wherein the peripheral area B is provided with a second dot structure 413, and the second dot structure 413 is used for improving the uniformity of light intensity distribution of the backlight module, wherein the dot diameter at a position with high light intensity is large, the light absorption is high, the dot diameter at a position with low light intensity is small, and the light absorption is low, so that the light intensity distribution of the light emitting surface is uniform.
In an exemplary embodiment, as shown in fig. 7 and 8, the side plate and the bottom plate of the back plate 100 are disposed obliquely, and accordingly, the peripheral region B of the first reflective sheet 410 is oblique to the middle region a, and the dot diameter of the second dot structure 413 gradually increases from a side of the peripheral region B close to the middle region a to a side of the peripheral region B far from the middle region a.
As shown in fig. 10, in some exemplary embodiments, the backlight module further includes a support column 500, a diffusion plate 600, an optical film 200, and the like.
The embodiment of the disclosure further provides a display device, which comprises the backlight module and the display panel provided by the embodiment of the disclosure.
The following points need to be explained:
(1) the drawings of the embodiments of the disclosure only relate to the structures related to the embodiments of the disclosure, and other structures can refer to the common design.
(2) For purposes of clarity, the thickness of layers or regions in the figures used to describe embodiments of the present disclosure are exaggerated or reduced, i.e., the figures are not drawn on a true scale. It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, it can be "directly on" or "under" the other element or intervening elements may be present.
(3) Without conflict, embodiments of the present disclosure and features of the embodiments may be combined with each other to arrive at new embodiments.
The above is only a specific embodiment of the present disclosure, but the scope of the present disclosure is not limited thereto, and the scope of the present disclosure should be determined by the scope of the claims.
Claims (10)
1. A backlight module includes: the backlight module comprises a back plate, an optical film material, a light bar assembly and a reflector plate, wherein the back plate and the optical film material are oppositely arranged, the light bar assembly is arranged on one side surface of the back plate facing the optical film material, the light bar assembly comprises a plurality of light bars and at least one light bar conversion plate connected with the light bars, a plurality of lamp beads arranged at intervals are arranged on each light bar, and a plurality of terminals are arranged on the light bar conversion plate; characterized in that, the reflector plate includes:
the first reflector plate is attached to one side surface of the back plate facing the optical film material and at least covers the light bar, a light bead avoiding opening and a terminal avoiding opening are formed in the first reflector plate, the light bead penetrates through the light bead avoiding hole, and the terminal avoiding opening is opposite to the terminal;
the second reflector plate is fixed on one side, far away from the back plate, of the light bar conversion plate, and the orthographic projection of the second reflector plate on the back plate is overlapped with the orthographic projection of the light bar conversion plate on the back plate so as to shield the terminal avoiding opening.
2. The backlight module as claimed in claim 1, wherein the first reflective sheet is formed by splicing at least two sub-reflective sheets, and at least one of the sub-reflective sheets of the at least two sub-reflective sheets is provided with the terminal avoiding opening.
3. The backlight module according to claim 2, wherein the overlapping portion of each of the second reflective sheets and the first reflective sheet is a splicing region of the second reflective sheet and the first reflective sheet, and the width of the splicing region is 5-20 mm.
4. The backlight module as claimed in claim 1, wherein the number of the second reflective sheets is the same as the number of the light bar conversion plates, and one second reflective sheet correspondingly shields one light bar conversion plate.
5. The backlight module as claimed in claim 1, wherein the second reflector comprises a second reflective surface facing away from the back plate, and the second reflective surface is provided with a first dot structure.
6. The backlight module as claimed in claim 5, wherein the first dot structure comprises black screen printing dots; the mesh point diameter of the first mesh point structure is 1.3 +/-1 mm.
7. The backlight module as claimed in claim 1, wherein the second reflective sheet is fixed on the light bar conversion plate and/or the first reflective sheet by double-faced adhesive.
8. The backlight module according to claim 1, wherein the back plate comprises a bottom plate and a plurality of side plates surrounding the bottom plate; the first reflector plate comprises a middle area attached to the area corresponding to the bottom plate and a peripheral area attached to the area corresponding to the side plates, wherein the peripheral area is provided with a second lattice point structure.
9. A backlight module according to claim 8, wherein the dot diameter of the second dot structure is gradually larger from a side of the peripheral region close to the middle region to a side of the peripheral region far from the middle region.
10. A display device comprising the backlight module according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120528634.XU CN214751226U (en) | 2021-03-12 | 2021-03-12 | Backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120528634.XU CN214751226U (en) | 2021-03-12 | 2021-03-12 | Backlight module and display device |
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| Publication Number | Publication Date |
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| CN214751226U true CN214751226U (en) | 2021-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120528634.XU Active CN214751226U (en) | 2021-03-12 | 2021-03-12 | Backlight module and display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115268126A (en) * | 2022-07-29 | 2022-11-01 | 京东方晶芯科技有限公司 | Reflective film, reflective sheet attaching apparatus and method, light-emitting substrate, and display device |
-
2021
- 2021-03-12 CN CN202120528634.XU patent/CN214751226U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115268126A (en) * | 2022-07-29 | 2022-11-01 | 京东方晶芯科技有限公司 | Reflective film, reflective sheet attaching apparatus and method, light-emitting substrate, and display device |
| CN115268126B (en) * | 2022-07-29 | 2024-01-30 | 京东方晶芯科技有限公司 | Reflective film, reflective sheet attaching apparatus and method, light-emitting substrate, and display device |
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