CN214067426U - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN214067426U CN214067426U CN202022601201.0U CN202022601201U CN214067426U CN 214067426 U CN214067426 U CN 214067426U CN 202022601201 U CN202022601201 U CN 202022601201U CN 214067426 U CN214067426 U CN 214067426U
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Abstract
The utility model provides a backlight unit, display device belongs to and shows technical field, and it can solve the stronger problem of impact force between light guide plate, optics rete and the backplate among current display device's backlight unit at least. The utility model discloses a backlight module, include: the back plate comprises a bottom plate and a side plate positioned on the periphery of the bottom plate, and the bottom plate and the side plate form an accommodating cavity; the light guide plate is positioned in the accommodating cavity; the optical film layer is positioned in the accommodating cavity and positioned on one side, away from the back plate, of the bottom plate of the light guide plate; the at least one limiting piece is located in the accommodating cavity and used for limiting the position of the light guide plate and the position of the optical film layer relative to the back plate, and the limiting piece comprises a buffering structure which is used for absorbing impact force between the limiting piece and the back plate or the light guide plate.
Description
Technical Field
The utility model belongs to the technical field of show, concretely relates to backlight module, display device.
Background
In recent years, with the continuous development of display technologies, the application range of display devices is also expanding, such as smart phones, smart bracelets, smart televisions, vehicle-mounted displays, and the like. With the heat of the automobile market, the requirements of matching large-screen central control and instrument panels are increasing day by day so as to meet the requirements of people on automobiles. Nowadays, vehicle-mounted touch display gradually moves to multiple forms such as large screen, high definition, narrow frame and the like, especially for electric vehicles.
The backlight module in the prior art at least comprises a back plate, a light guide plate and an optical film layer, wherein the light guide plate and the optical film layer are positioned in the back plate. In order to reduce the collision between the light guide plate, the optical film layer and the back plate, a rubber block or a double-sided tape is generally disposed between the light guide plate, the optical film layer and the back plate. However, the backlight module of the vehicle-mounted display device has large shaking and impact when in use, so that the impact force between the light guide plate, the optical film layer and the back plate cannot be weakened well by the existing rubber block or double-sided adhesive tape, and the light guide plate and the optical film layer are easily damaged.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the stronger problem of impact force between light guide plate, optics rete and the backplate among the backlight unit of present display device is solved to the at least part, provides a backlight unit that can weaken the impact force between light guide plate, optics rete and the backplate.
Solve the utility model discloses technical scheme that technical problem adopted is a backlight unit, include: the back plate comprises a bottom plate and a side plate positioned on the periphery of the bottom plate, and the bottom plate and the side plate form an accommodating cavity; the light guide plate is positioned in the accommodating cavity; the optical film layer is positioned in the accommodating cavity and positioned on one side, away from the back plate, of the bottom plate of the light guide plate; the at least one limiting piece is located in the accommodating cavity and used for limiting the position of the light guide plate and the position of the optical film layer relative to the back plate, and the limiting piece comprises a buffering structure which is used for absorbing impact force between the limiting piece and the back plate or the light guide plate.
It is further preferable that at least a part of the stopper is located between the side surface of the light guide plate and the side plate of the back plate; the buffer structure includes: the first part is arranged on the surface, facing the side plate of the back plate, of the limiting piece and is used for absorbing impact force between the limiting piece and the side plate; the second part is arranged on the surface of the side face, facing the light guide plate, of the limiting part and is used for absorbing impact force between the limiting part and the light guide plate.
It is further preferred that the first portion includes a plurality of first projections, with a space between any adjacent two of the first projections.
It is further preferable that the first protrusions are arranged in a row.
It is further preferable that the second portion includes a plurality of second protrusions, and a space is provided between any two adjacent second protrusions, and the second protrusions are located between the side surface of the light guide plate and the side plate of the rear plate.
It is further preferable that the size of the light guide plate is larger than the size of the second protrusion in a first direction, the first direction being parallel to a direction perpendicular to the light guide plate; the light guide plate comprises a body and a limiting structure, the limiting structure is connected with the side face of the body, and the limiting structure is located on the surface, away from the bottom plate of the back plate, of the second protrusion.
It is further preferable that the edge of the second protrusion facing the light guide plate has a rounded chamfer.
It is further preferred that at least a part of the optical film layer is disposed on a side of the second protrusion away from the bottom plate of the back plate; the stopper further includes: and a space is formed between any two adjacent third bulges, the third bulges are arranged on the surfaces of the side surfaces, facing the optical film layer, of the limiting parts, and the size of each third bulge is smaller than that of each second bulge in a second direction parallel to the direction, facing the optical film layer, of each third bulge.
Further preferably, the back plate includes: a first positioning structure; the stopper further includes: and the second positioning structure is matched with the first positioning structure of the back plate and is used for fixing the limiting part on the back plate.
Further preferably, the number of the limiting members is two, and the two limiting members are respectively located at two ends of the same edge of the light guide plate.
Solve the utility model discloses technical scheme that technical problem adopted is a display device, including foretell backlight unit, display device is vehicle-mounted display device.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic top view of a partial structure of a backlight module according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional structure diagram of a partial structure of a backlight module according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a partial structure of a backlight module according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a limiting member of a backlight module according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a limiting member of a backlight module according to an embodiment of the present invention.
Wherein the reference numerals are: 1. a back plate; 11. a base plate; 12. a side plate; 13. a first positioning structure; 2. a light guide plate; 21. a limiting structure; 3. an optical film layer; 4. a limiting member; 41. a first protrusion; 42. a second protrusion; 43. a third protrusion; 44. a second positioning structure; 45. an extension structure.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by like reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale. Moreover, certain well-known elements may not be shown in the figures.
Numerous specific details of the invention, such as structure, materials, dimensions, processing techniques and techniques of components, are set forth in the following description in order to provide a more thorough understanding of the invention. However, as will be understood by those skilled in the art, the present invention may be practiced without these specific details.
Example 1:
as shown in fig. 1 to 5, the present embodiment provides a backlight module, including:
the back plate 1 comprises a bottom plate 11 and a side plate 12 positioned on the periphery of the bottom plate 11, wherein the bottom plate 11 and the side plate 12 form an accommodating cavity;
the light guide plate 2 is positioned in the accommodating cavity;
the optical film layer 3 is positioned in the accommodating cavity and positioned on one side, away from the back plate 1, of the bottom plate 11 of the light guide plate 2;
and the limiting piece 4 is positioned in the accommodating cavity and used for limiting the positions of the light guide plate 2 and the optical film layer 3 relative to the back plate 1, and the limiting piece 4 comprises a buffer structure which is used for absorbing impact force between the limiting piece 4 and the back plate 1 or the light guide plate 2.
The bottom plate 11 and the side plate 12 of the back plate 1 enclose a box shape with one open side, for example, if the bottom plate 11 is rectangular, the shape of the accommodating cavity formed by the box shape is a rectangular parallelepiped.
In the backlight module, a plurality of optical films 3, a plurality of light guide plates 2, and a plurality of bottom plates 11 of a back plate 1 are sequentially stacked from top to bottom.
The backlight module of this embodiment has locating part 4, and locating part 4 is including being used for absorbing the impact force buffer structure between locating part 4 and backplate 1 or light guide plate 2 to make the impact force between reducing light guide plate 2 and the backplate 1, not only can avoid causing the damage of light guide plate 2 because backplate 1 to the impact force of light guide plate 2, but also the abnormal sound that the backlight module that can significantly reduce produced when rocking, and then improve the user and use the display device who has this backlight module's experience and feel.
It should be noted that the backlight module of the present embodiment is more suitable for a vehicle-mounted display device, such as a display device of an electric vehicle.
Preferably, at least part of the limiting member 4 is located between the side surface of the light guide plate 2 and the side plate 12 of the back plate 1; the buffer structure includes: the first part is arranged on the surface, facing the side plate 12 of the back plate 1, of the limiting piece 4 and is used for absorbing impact force between the limiting piece 4 and the side plate 12; the second portion is disposed on a surface of the side surface of the limiting member 4 facing the light guide plate 2, and is configured to absorb an impact force between the limiting member 4 and the light guide plate 2.
Specifically, the first portion includes a plurality of first protrusions 41, and any two adjacent first protrusions 41 have a space therebetween.
As shown in fig. 1 to 4, the first portion of the buffering structure can be regarded as a hollow shape of the limiting member 4 facing the side plate 12 of the back plate 1, that is, an interval between any two adjacent first protrusions 41 corresponds to a blind hole formed in the limiting member 4.
The setting of first portion makes the rigidity of locating part 4 towards the part of backplate 1's curb plate 12 weaken, and toughness strengthens to make when light guide plate 2 is towards the side striking of backplate 1, the first portion can play the cushioning effect, thereby absorbs the impact force between the side of light guide plate 2 and backplate 1, not only guarantees light guide plate 2's performance, can also reduce backlight unit's abnormal sound.
Preferably, the plurality of first protrusions 41 are arranged in a row.
One of the situations is: the first protrusions 41 may be arranged along the corresponding edges of the light guide plate 2 as shown in fig. 4.
The other situation is as follows: the first protrusions 41 may be arranged in a direction perpendicular to the light guide plate 2 as shown in fig. 5.
The arrangement of the two first protrusions 41 is simple, so that the manufacturing method of the limiting member 4 is simple, and the manufacturing cost is reduced.
It should be noted that the arrangement of the first protrusions 41 may be other suitable arrangements, and is not limited to the above-mentioned example.
Specifically, the second portion includes a plurality of second protrusions 42, a space is provided between any two adjacent second protrusions 42, and the second protrusions 42 are located between the side surface of the light guide plate 2 and the side plate 12 of the rear plate 1.
As shown in fig. 4, the second portion of the buffer structure can be regarded as a hollow shape of the side surface of the limiting member 4 facing the light guide plate 2, that is, the interval between any two adjacent second protrusions 42 is equivalent to a blind hole formed in the limiting member 4.
The setting of second part makes the rigidity of the part of locating part 4 orientation light guide plate 2's side weaken, and toughness reinforcing to when making light guide plate 2 towards the side striking of backplate 1, the cushioning effect can be played to the first portion, thereby further absorbs the impact force between the side of light guide plate 2 and backplate 1, not only guarantees light guide plate 2's performance, can also reduce backlight unit's abnormal sound.
Preferably, the size of the light guide plate 2 is larger than the size of the second protrusions 42 in a first direction (as indicated by arrow x in fig. 2), which is parallel to a direction perpendicular to the light guide plate 2; the light guide plate 2 comprises a body and a limiting structure 21, the limiting structure 21 is connected with the side surface of the body, and the limiting structure 21 is located on the surface of the second protrusion 42 away from the bottom plate 11 of the back plate 1.
Wherein, that is, the thickness of the light guide plate 2 is greater than the thickness of the second protrusion 42, so that the second protrusion 42 can be located between the side surface of the light guide plate 2 and the side plate 12 of the rear panel 1. The position-limiting structure 21 is located at a position close to the upper surface of the light guide plate 2 and is clamped on the upper surface of the second protrusion 42, so that the second protrusion 42 can limit the position of the light guide plate 2 relative to the back plate 1 in a direction (first direction) perpendicular to the light guide plate 2. Further, the second protrusions 42 can define the position of the light guide plate 2 with respect to the rear plate 1 in a direction parallel to the light guide plate 2.
It should be noted that the thickness of the light guide plate 2 may also be the same as the thickness of the second protrusion 42, at this time, the light guide plate 2 does not have the position-limiting structure 21, and the light guide plate 2 exactly corresponds to the second protrusion 42, so that the second protrusion 42 can be limited to the position of the light guide plate 2 relative to the back plate 1 in the direction parallel to the light guide plate 2.
Preferably, the edge of the second protrusion 42 facing the light guide plate 2 has a rounded chamfer.
In other words, the edge of the second protrusion 42 facing the light guide plate 2 is arc-shaped, so that damage, such as scratch, to the light guide plate 2 caused by the limiting member 4 when the light guide plate 2 is installed can be avoided, and the installation difficulty of the backlight module is reduced. Specifically, the radius of the round chamfer is 0.3 to 0.8mm, preferably 0.5 mm.
Preferably, at least part of the optical film layer 3 is disposed on the side of the second protrusion 42 away from the bottom plate 11 of the back plate 1; the limiting member 4 further includes: the third protrusions 43, any two adjacent third protrusions 43 have a gap therebetween, the third protrusions 43 are disposed on the surface of the side surface of the limiting member 4 facing the optical film layer 3, and the size of the third protrusions 43 is smaller than that of the second protrusions 42 in a second direction (as shown by an arrow y in fig. 2), which is parallel to the direction in which the third protrusions 43 point to the optical film layer 3.
Wherein, as shown in fig. 4, when the third projection 43 and the second projection 42 correspond one to one, the third projection 43 and the second projection 42 form a step-like structure.
The third protrusions 43 are located between the side of the optical film layer 3 and the side plate 12 of the back plate 1, so that the second protrusions 42 can define the position of the optical film layer 3 with respect to the back plate 1 in a direction parallel to the optical film layer 3. And since the size of the third protrusions 43 in the second direction is smaller than that of the second protrusions 42, the portions of the optical film layer 3 corresponding to the second protrusions 42 are located on the upper surfaces of the second protrusions 42, so that the second protrusions 42 can define the position of the optical film layer 3 relative to the back plate 1 in the direction perpendicular to the optical film layer 3 (the first direction).
Preferably, the back sheet 1 includes: a first positioning structure 13; the limiting member 4 further includes: the second positioning structure 44 is adapted to the first positioning structure 13 of the back plate 1, and is used for fixing the limiting member 4 on the back plate 1.
Wherein the positioning structure is divided into a first positioning structure 13 and a second positioning structure 44. Specifically, as shown in fig. 2, the second positioning structure 22 is located on the surface of the bottom plate 11 of the back plate 1 near the limiting member 4, and may be a protrusion structure, and correspondingly, the first positioning structure 13 of the back plate 1 is a positioning groove located on the bottom plate 11 and capable of adapting to the protrusion structure, so that when the protrusion structure is engaged with the positioning groove, the limiting member 4 is fixed on the back plate 1.
In addition, as shown in fig. 3, the second positioning structure 44 is a groove disposed on the surface of the bottom plate 11 of the position-limiting member 4 close to the back plate 1, and the first positioning structure 13 is a positioning protrusion disposed on the side plate 12 of the back plate 1, and the positioning protrusion is matched with the groove, so that the position-limiting member 4 is fixed on the back plate 1 when the positioning protrusion is engaged with the groove.
The first positioning structure 13 of the back plate 1 and the second positioning structure 44 of the stopper 4 are not limited to the above-described configurations, and may be other suitable configurations.
Preferably, the number of the limiting members 4 is two, and the two limiting members are respectively located at two ends of the same edge of the light guide plate 2.
Specifically, as shown in fig. 1 to 4, each of the position-limiting members 4 further includes an extending structure 45, where the extending structure 45 is located at an adjacent side of the light guide plate 2 where the extending structure 45 is located, that is, if the light guide plate 2 is rectangular, the extending structure 45 is equivalent to being perpendicular to the side corresponding to the second protrusion 42, and the extending structure 45 may be located between the light guide plate 2, the optical film layer 3, and the adjacent side plate 12 of the back plate 1, and is used to limit the position of the light guide plate 2 and the optical film layer 3 relative to the back plate 1.
Thus, when the two position-limiting members 4 are respectively located at two ends of the same edge of the light guide plate 2, the position-limiting members 4 correspond to the three edges of the light guide plate 2, and the collision between the optical film layer 3, the light guide plate 2, and the side wall of the back plate 1 can be further avoided.
In addition, the limiting member 4 as shown in fig. 5 can be used in a backlight module of a special-shaped display panel because the limiting member 4 limits the angle of the light guide plate 2 to be a non-right angle.
Preferably, the stopper 4 is formed of a material having elasticity, such as rubber, silicone, or the like.
In addition, in the process of assembling or disassembling, the plurality of first protrusions 41, the second protrusions 42, and the third protrusions 43 of the limiting member 4 in this embodiment compress the elastic limiting member 4 after being extruded, so that the light guide plate 2 and the back plate 1 can be conveniently disassembled and assembled, thereby achieving a certain effect of optimizing production.
Simultaneously, because locating part 4's elasticity is better, consequently when backplate 1 or optical module receive external annular and take place slight deformation, if, thermal expansion, defects such as warpage, bulging can not appear in backplate 1 or optical module can be guaranteed to locating part 4.
Example 2:
the present embodiment provides a display device, including the backlight module in embodiment 1, where the display device is an on-vehicle display device.
Specifically, the display device can be any product or component with a display function, such as a liquid crystal display panel, electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In accordance with the embodiments of the present invention as set forth above, these embodiments are not exhaustive and do not limit the invention to the precise embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical application, to thereby enable others skilled in the art to best utilize the invention and its various embodiments with various modifications as are suited to the particular use contemplated. The present invention is limited only by the claims and their full scope and equivalents.
Claims (11)
1. A backlight module, comprising:
the back plate comprises a bottom plate and a side plate positioned on the periphery of the bottom plate, and the bottom plate and the side plate form an accommodating cavity;
the light guide plate is positioned in the accommodating cavity;
the optical film layer is positioned in the accommodating cavity and positioned on one side, away from the back plate, of the bottom plate of the light guide plate;
the at least one limiting piece is located in the accommodating cavity and used for limiting the position of the light guide plate and the position of the optical film layer relative to the back plate, and the limiting piece comprises a buffering structure which is used for absorbing impact force between the limiting piece and the back plate or the light guide plate.
2. The backlight module according to claim 1, wherein at least a portion of the stopper is located between a side surface of the light guide plate and a side plate of the back plate;
the buffer structure includes:
the first part is arranged on the surface, facing the side plate of the back plate, of the limiting piece and is used for absorbing impact force between the limiting piece and the side plate;
the second part is arranged on the surface of the side face, facing the light guide plate, of the limiting part and is used for absorbing impact force between the limiting part and the light guide plate.
3. A backlight module according to claim 2, wherein the first portion comprises a plurality of first protrusions, and a space is provided between any two adjacent first protrusions.
4. The backlight module as claimed in claim 3, wherein the first protrusions are arranged in rows.
5. The backlight module according to claim 2, wherein the second portion comprises a plurality of second protrusions, and a space is provided between any two adjacent second protrusions, and the second protrusions are located between the side surface of the light guide plate and the side plate of the back plate.
6. The backlight module according to claim 5, wherein the light guide plate has a size larger than that of the second protrusion in a first direction, the first direction being parallel to a direction perpendicular to the light guide plate;
the light guide plate comprises a body and a limiting structure, the limiting structure is connected with the side face of the body, and the limiting structure is located on the surface, away from the bottom plate of the back plate, of the second protrusion.
7. A backlight module according to claim 5, wherein the edge of the second protrusion facing the light guide plate has a rounded chamfer.
8. The backlight module according to claim 5, wherein at least a portion of the optical film layer is disposed on a side of the second protrusion away from the bottom plate of the back plate;
the stopper further includes: and a space is formed between any two adjacent third bulges, the third bulges are arranged on the surfaces of the side surfaces, facing the optical film layer, of the limiting parts, and the size of each third bulge is smaller than that of each second bulge in a second direction parallel to the direction, facing the optical film layer, of each third bulge.
9. The backlight module according to claim 1, wherein the back plate comprises: a first positioning structure;
the stopper further includes: and the second positioning structure is matched with the first positioning structure of the back plate and is used for fixing the limiting part on the back plate.
10. The backlight module according to claim 1, wherein the two position-limiting members are respectively disposed at two ends of the same edge of the light guide plate.
11. A display device, comprising the backlight module of any one of claims 1 to 10, wherein the display device is a vehicle-mounted display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022601201.0U CN214067426U (en) | 2020-11-11 | 2020-11-11 | Backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022601201.0U CN214067426U (en) | 2020-11-11 | 2020-11-11 | Backlight module and display device |
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| CN214067426U true CN214067426U (en) | 2021-08-27 |
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| CN202022601201.0U Active CN214067426U (en) | 2020-11-11 | 2020-11-11 | Backlight module and display device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114935852A (en) * | 2022-05-31 | 2022-08-23 | 惠科股份有限公司 | Backlight module and display device |
| CN115291316A (en) * | 2022-08-26 | 2022-11-04 | 京东方科技集团股份有限公司 | Backlight module and display device |
-
2020
- 2020-11-11 CN CN202022601201.0U patent/CN214067426U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114935852A (en) * | 2022-05-31 | 2022-08-23 | 惠科股份有限公司 | Backlight module and display device |
| CN115291316A (en) * | 2022-08-26 | 2022-11-04 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN115291316B (en) * | 2022-08-26 | 2024-02-20 | 京东方科技集团股份有限公司 | Backlight module and display device |
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