CN216160947U - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN216160947U CN216160947U CN202121373905.5U CN202121373905U CN216160947U CN 216160947 U CN216160947 U CN 216160947U CN 202121373905 U CN202121373905 U CN 202121373905U CN 216160947 U CN216160947 U CN 216160947U
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Abstract
The embodiment of the application provides a backlight module and a display device. The backlight module includes: the back plate comprises a back plate main body and a retaining wall part arranged at the edge of the back plate main body; the middle rubber frame comprises a frame main body and a mounting and positioning part vertical to the frame main body, and the frame main body is sleeved on the wall blocking part; the light guide plate is arranged on one side, close to the installation positioning part, of the back plate main body, and comprises a light guide plate main body and a first limiting boss arranged on the light guide plate main body, wherein the first limiting boss protrudes out of the surface of one side, close to the installation positioning part, of the light guide plate main body, and the first limiting boss also protrudes out of the surface of one side, close to the frame main body, of the light guide plate main body; the first limiting boss is configured to limit the optical diaphragm; wherein, be provided with on retaining wall portion and be used for dodging the groove of dodging of first spacing boss, a partial structure of first spacing boss extends to dodging in the groove.
Description
Technical Field
The application relates to the technical field of display, in particular to a backlight module and a display device.
Background
This section provides background information related to the present disclosure only and is not necessarily prior art.
Liquid crystal display devices have many technical and performance advantages as display devices widely used at present, and thus are currently the mainstream display devices in the market. At present, liquid crystal display devices are gradually becoming thinner and narrower in frame. The size of the frame of the liquid crystal display device is mainly limited by the backboard module, and the structural design of the backboard module determines the degree of narrowing the frame of the liquid crystal display device.
In the correlation technique, in order to satisfy the location requirement to the optical film piece in the backplate module, set up the spacing boss that is used for carrying on spacingly to the optical film piece at the edge of light guide plate, spacing boss inevitably can produce the boss bright spot. When the frame is designed, the limiting boss is generally hidden in the invisible area, so that the boss bright point cannot be observed by a user, and a sufficient horizontal distance is required to be ensured between the limiting boss and the display area of the display device. In addition, in designing the frame, it is necessary to provide a receiving space for the back plate retaining wall portion (also referred to as a back plate folded edge) and a space for the optical film to expand at a high temperature. Due to the above-described limitations, it is difficult to further reduce the size of the frame of the liquid crystal display device.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a backlight unit and display device, satisfying can fix a position optical film, make optical film have sufficient expansion space under high temperature, make the boss bright spot not observed by the user etc. under the requirement, can realize the further reduction of frame size. The specific technical scheme is as follows:
an embodiment of a first aspect of the present application provides a backlight module, including:
the back plate comprises a back plate main body and a retaining wall part arranged at the edge of the back plate main body;
the middle rubber frame comprises a frame main body and an installation positioning part perpendicular to the frame main body, and the frame main body is sleeved on the retaining wall part;
the light guide plate is arranged on one side, close to the installation positioning part, of the back plate main body, and comprises a light guide plate main body and a first limiting boss arranged on the light guide plate main body, the first limiting boss protrudes out of the surface of one side, close to the installation positioning part, of the light guide plate main body, and the first limiting boss also protrudes out of the surface of one side, close to the frame main body, of the light guide plate main body;
the limiting membrane is arranged on one side, far away from the back plate main body, of the light guide plate main body, and the first limiting boss is configured to limit the optical membrane;
the retaining wall part is provided with an avoidance groove for avoiding the first limiting boss, and part of the structure of the first limiting boss extends into the avoidance groove.
In some embodiments of the present application, the number of the first limiting bosses is two, and two of the first limiting bosses are disposed at two opposite edges of the light guide plate body.
In some embodiments of the present application, the number of the first limiting bosses is three or four, and each of the first limiting bosses is disposed at a different edge of the light guide plate body.
In some embodiments of the present application, a dimension of the first limiting projection in a first direction is greater than or equal to 1.5mm, and the first direction is perpendicular to a surface of the light guide plate body near one side of the frame body.
In some embodiments of the present application, a distance between a surface of the first limit boss close to the frame body side and a surface of the light guide plate body close to the frame body side is 0.8mm to 1.0 mm.
In some embodiments of the present application, a distance between an edge of the optical film and the blocking wall portion is greater than or equal to 0.002L, L being a dimension of the optical film in a first direction perpendicular to a surface of the light guide plate body near a side of the frame body.
In some embodiments of the present application, a second limiting boss is disposed on one side of the mounting and positioning portion close to the optical film, the first limiting boss is located between the second limiting boss and the frame main body, and the second limiting boss is opposite to the optical film.
An embodiment of a second aspect of the present application provides a display device, including the backlight module in any of the above embodiments.
In some embodiments of the present application, the display device further includes a liquid crystal display panel, the liquid crystal display surface is disposed on one side of the installation positioning portion, which is away from the light guide plate, the frame main body is connected to the liquid crystal display panel through a first adhesive tape, and the installation positioning portion is connected to the liquid crystal display panel through a second adhesive tape.
In some embodiments of the present application, the liquid crystal display panel includes an effective display area and a peripheral area located outside the effective display area, and a minimum distance between a projection of the first limiting projection on the liquid crystal display panel and the effective display area is greater than 0.8 mm.
According to backlight module and display device that this application embodiment provided, backlight module is provided with first spacing boss in the light guide plate main part, and first spacing boss protrusion is on the surface of the installation location portion one side of the well gluey frame 200 that is close to of light guide plate main part, and first spacing boss can carry on spacingly to the optics diaphragm that sets up the one side that deviates from the backplate main part in light guide plate main part 310 to satisfy the location requirement to the optics diaphragm. When designing the size of the frame of the liquid crystal display device, the following factors are considered: first, in order to prevent the first limit boss bright spot from being observed by the user, the distance between the first limit boss and the effective display area of the liquid crystal display panel needs to be greater than or equal to a certain value. Secondly, in order to ensure the structural strength of the first limiting projection, the dimension of the first limiting projection in the first direction (the first direction is defined as the direction perpendicular to the surface of the light guide plate main body close to the frame main body) cannot be smaller than a certain value. And a certain space needs to be reserved between the edge of the limiting boss and the optical membrane and the retaining wall part of the back plate so as to adapt to the situation that the optical membrane expands at high temperature. The backlight module of this application embodiment is provided with on the barricade portion of backplate and dodges the groove, and the inslot is dodged to partial structure extension of first spacing boss, compares with backplate 1 module among the correlation technique, under the unchangeable condition of size on the first direction of first spacing boss, has moved a bit distance outward to the edge of backplate module in other words with first spacing boss, makes first spacing boss occupy the space that partly originally occupied by barricade portion. Therefore, when the frame is designed, the influence of the thickness of the retaining wall part (namely the thickness of the back plate) can be ignored, so that the frame can be made narrower under the condition of meeting the three factors.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings used in the description of the embodiments of the present application or the related art are briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the present application, and that for a person skilled in the art, other drawings can be derived from these drawings without inventive effort 0.
Fig. 1 is a schematic structural view of a backlight module according to an embodiment of the present application (on a cross section where a first limiting boss is located);
fig. 2 is a schematic structural diagram of a backlight module according to an embodiment of the present application (on a cross section not including the first limiting projection).
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As shown in fig. 1 and fig. 2, an embodiment of the first aspect of the present application provides a backlight module 10. The backlight module 10 includes a back plate 100, a middle frame 200, a light guide plate 300, and an optical film 400. Specifically, the back plate 100 includes a back plate main body 110 and a retaining wall portion 120 disposed at an edge of the back plate main body 110. The middle rubber frame 200 includes a frame main body 210 and an installation positioning portion 220 perpendicular to the frame main body 210, the frame main body 210 is sleeved on the wall blocking portion 120, the installation positioning portion 220 and the frame main body 210 are in an integrated structure and extend in a direction close to the center of the backlight module 10, and when the backlight module 10 and the liquid crystal display panel 20 are assembled, the installation positioning portion 220 is used for being bonded with the liquid crystal display panel 20. The light guide plate 300 is disposed on one side of the back plate main body 110 close to the installation positioning portion 220, the light guide plate 300 includes a light guide plate main body 310 and a first limiting boss 320 disposed on the light guide plate main body 310, the first limiting boss 320 protrudes out of the surface of the light guide plate main body 310 close to the installation positioning portion 220, the first limiting boss 320 further protrudes out of the surface of the light guide plate main body 310 close to one side of the frame main body 210, the limiting membrane is disposed on one side of the light guide plate main body 310 away from the back plate main body 110, and the first limiting boss 320 is configured to limit the optical membrane 400. The baffle wall part 120 is provided with an avoiding groove 121 for avoiding the first limiting boss 320, and a part of the structure of the first limiting boss 320 extends into the avoiding groove 121.
According to the backlight module 10 of the embodiment of the application, the first limiting boss 320 is disposed on the light guide plate main body 310, the first limiting boss 320 protrudes out of the surface of the light guide plate main body 310 close to the side of the installation positioning portion 220 of the middle rubber frame 200, and the first limiting boss 320 can limit the optical film 400 disposed on the side of the light guide plate main body 310 departing from the back plate main body 110, so as to meet the positioning requirement of the optical film 400.
When designing the size of the frame of the liquid crystal display device, the following factors are considered: first, in order to prevent the bright point of the first position-limiting protrusion 320 from being observed by the user, the distance between the first position-limiting protrusion 320 and the effective display area of the liquid crystal display panel 20 needs to be greater than or equal to a certain value. Second, in order to ensure the structural strength of the first position-limiting protrusion 320, the dimension of the first position-limiting protrusion 320 in the first direction (the first direction is defined as a direction perpendicular to the surface of the light guide plate body 310 close to the frame body 210) cannot be smaller than a certain value. Thirdly, a certain space needs to be reserved between the edge of the limiting boss and the optical film 400 and the retaining wall part 120 of the back plate 100 to adapt to the situation that the optical film 400 expands at high temperature.
In the backlight module 10 of the embodiment of the application, the avoiding groove 121 is disposed on the retaining wall 120 of the back plate 100, and a part of the structure of the first limiting protrusion 320 extends into the avoiding groove 121, compared with the back plate 100 module in the related art, under the condition that the size of the first limiting protrusion 320 in the first direction is not changed, the first limiting protrusion 320 is moved outward a little distance toward the edge of the back plate 100 module, so that the first limiting protrusion 320 occupies a part of the space occupied by the retaining wall 120 originally. Therefore, when designing the frame, the influence of the thickness of the blocking wall part 120 (i.e., the thickness of the backboard 100) can be ignored, and the frame can be made narrower while satisfying the above three factors.
In some embodiments of the present application, the number of the first stopper bosses 320 is two, and two first stopper bosses 320 are disposed at opposite edges of the light guide plate body 310. In this way, the two first limiting bosses 320 can limit the movement of the optical film 400 in a certain direction (for example, the movement in the left-right direction), so as to meet the positioning requirement of the optical film 400.
In other embodiments of the present application, the number of the first limiting bosses 320 is three or four, and each of the first limiting bosses 320 is disposed at a different edge of the light guide plate body 310. In this way, movement of the optical film 400 in two directions of movement (e.g., left-right direction movement, and up and/or down movement) may be limited, thereby better positioning the optical film 400.
In some embodiments of the present application, a dimension of the first limiting projection 320 in a first direction is greater than or equal to 1.5mm, and the first direction is perpendicular to a surface of the light guide plate body 310 on a side close to the frame body 210. In this embodiment, the size of the first limiting boss 320 in the first direction is greater than or equal to 1.5mm, so that the first limiting boss 320 can be ensured to bear the impact force given by the optical film 400 in the case of encountering vibration or external force impact. Specifically, for a liquid crystal display device below 10 inches, the size of the first limiting boss 320 in the first direction is greater than or equal to 1.5 mm; for a 10-13 inch liquid crystal display device, the size of the first limiting boss 320 in the first direction is larger than or equal to 1.8 mm; for a 15 inch or more liquid crystal display device, the size of the first limit boss 320 in the first direction is greater than or equal to 2.3 mm.
In some embodiments of the present disclosure, a distance between a surface of the first position-limiting protrusion 320 near the frame main body 210 and a surface of the light guide plate main body 310 near the frame main body 210 is 0.8mm to 1.0 mm. That is, the first limit boss 320 extends 0.8mm to 1.0mm with respect to the light guide plate body 310. If the distance between the first position-limiting protrusion 320 and the light guide plate main body 310 is too large, the length of the connecting portion between the first position-limiting protrusion 320 and the light guide plate main body 310 is too small, so that the connecting strength between the first position-limiting protrusion 320 and the light guide plate main body 310 is too low to withstand the impact force given by the optical film 400. On the contrary, if the distance between the first position-limiting protrusion 320 and the extension of the light guide plate body 310 is too small, the first position-limiting protrusion 320 may not extend into the avoiding groove 121 of the blocking wall part 120, and the reduction of the frame size may not be significant.
In some embodiments of the present application, a distance between an edge of the optical film 400 and the retaining wall 120 is greater than or equal to 0.002L, where L is a dimension of the optical film 400 in a first direction, and the first direction is perpendicular to a surface of the light guide plate main body 310 on a side close to the frame main body 210. Both the optical film 400 and the light guide plate 300 may be expanded in a high temperature environment, and generally, the expansion coefficient of the optical film 400 is greater than that of the light guide plate 300, and thus, the optical film 400 may be designed with the expansion thereof as a reference to reserve a space for the optical film 400 and the light guide plate 300 to expand. Specifically, the expansion coefficient of the optical film 400 is generally 0.4%, and thus, the distance between the edge of the optical film 400 and the dam portion 120 may be designed as: and L is an expansion coefficient/2, i.e., 0.002L (L is a dimension of the optical film 400 in the first direction). Thereby, the requirement of expansion of the optical film 400 and the light guide plate 300 at high temperature can be satisfied.
In some embodiments of the present application, a second limiting protrusion 221 is disposed on a side of the mounting and positioning portion 220 close to the optical film 400, the first limiting protrusion 320 is located between the second limiting protrusion 221 and the frame main body 210, and the second limiting protrusion 221 is opposite to the optical film 400. The second limiting protrusion limits the optical film 400 in a direction perpendicular to the light guide plate body 310, and under the condition of external force impact, the optical film 400 can be prevented from being displaced greatly in the direction perpendicular to the light guide plate body 310 and being separated from the first limiting protrusion 320.
The following is a specific example to further illustrate the beneficial effects of the embodiments of the present application:
as shown in fig. 1, the frame size Q in this example is limited to several sizes f, a, c, and e in the drawing, that is, the frame size Q is f + a + c + e.
Specifically, the dimension f represents the sum of the thickness of the frame, the thickness of the fixing tape (hereinafter, the first tape 30), and the clearance between the retaining wall 120 and the frame body 210, wherein the thickness of the frame is usually 0.7-1.0 mm, the thickness of the fixing tape is usually 0.06mm, and the clearance between the retaining wall 120 and the frame body 210 is usually set to 0.1 mm. Thus, the minimum value of f is 0.86 mm.
The dimension a represents the dimension of the space reserved for the optical film 400 and the light guide plate 300 to expand in the first direction, and is generally equal to or greater than 0.002L, where L is the dimension of the optical film 400 in the first direction. In the cross section where the first limit projection 320 is located, due to the existence of the avoiding groove 121, a in the cross section is equal to the distance between the first limit projection 320 and the frame body 210, but when the frame is designed, a ' value in other cross sections is taken as a design reference (as shown in fig. 2), wherein the a ' value is the distance between the edge of the optical fiber membrane and the retaining wall portion 120 of the back plate 100, specifically, a ' ═ L ═ expansion coefficient/2 ═ 0.002L.
The dimension c represents the dimension of the first stopper boss 320 in the first direction, and for a liquid crystal display device of 10 inches or less, the dimension of the first stopper boss 320 in the first direction is 1.5mm or more; for a 10-13 inch liquid crystal display device, the size of the first limiting boss 320 in the first direction is larger than or equal to 1.8 mm; for a 15 inch or more liquid crystal display device, the size of the first limit boss 320 in the first direction is greater than or equal to 2.3 mm.
The dimension e represents the minimum distance between the projection of the first position-limiting projection 320 on the liquid crystal display panel 20 and the effective display area of the liquid crystal display panel 20. To ensure that the highlight of the boss is not visible to the user, e is typically set to be greater than 0.8 mm.
In summary, taking a 12.3 inch display device as an example, the thickness of the back plate 100 is 0.8mm, the length of the optical film 400 is 300mm, and the size of the first limiting protrusion 320 in the first direction is 1.8mm, so that the limiting frame width is 0.86+0.002L +1.8+0.8, which is 0.86+0.6+1.8+0.8, which is 4.06 mm. This is more than 15% smaller than the bezel size of the conventional 12.3 inch display device.
An embodiment of the second aspect of the present application provides a display device, which includes the backlight module 10 in any of the above embodiments.
According to the display device of the embodiment of the application, the backlight module 10 is provided with the first limiting boss 320 on the light guide plate main body 310, the first limiting boss 320 protrudes out of the surface of the light guide plate main body 310 close to the side of the installation positioning portion 220 of the middle rubber frame 200, and the first limiting boss 320 can limit the optical film 400 arranged on the side of the light guide plate main body 310 departing from the back plate main body 110, so that the positioning requirement of the optical film 400 is met. In the backlight module 10 of the embodiment of the application, the avoiding groove 121 is disposed on the retaining wall 120 of the back plate 100, and a part of the structure of the first limiting protrusion 320 extends into the avoiding groove 121, compared with the back plate 100 module in the related art, under the condition that the size of the first limiting protrusion 320 in the first direction is not changed, the first limiting protrusion 320 is moved outward a little distance toward the edge of the back plate 100 module, so that the first limiting protrusion 320 occupies a part of the space occupied by the retaining wall 120 originally. Therefore, when the frame is designed, the influence of the thickness of the baffle wall part 120 (namely, the thickness of the back plate 100) can be ignored, so that the frame can be made narrower under the conditions that the bright spot of the first limiting boss 320 can not be observed by a user, the structural strength of the first limiting boss 320 is ensured, and the optical film 400 is adapted to various limiting factors such as expansion at high temperature.
In some embodiments of the present application, the display device further includes a liquid crystal display panel 20, the liquid crystal display surface is disposed on a side of the installation positioning portion 220 away from the light guide plate 300, the frame main body 210 of the middle rubber frame 200 is connected to the liquid crystal display panel 20 through the first adhesive tape 30, and the installation positioning portion 220 is connected to the liquid crystal display panel 20 through the second adhesive tape 40. The first adhesive tape 30 may be a fixing tape having a thickness of 0.006mm, which is a common type. The second tape 40 may be a foam tape, which not only serves to bond the backplane 100 module with the liquid crystal display panel 20, but also has a buffering effect, so as to improve the impact resistance of the display device.
In some embodiments of the present disclosure, the lcd panel 20 includes an effective display area and a peripheral area outside the effective display area, and a minimum distance between a projection of the first limiting projection 320 on the lcd panel 20 and the effective display area is greater than 0.8 mm. Therefore, the boss bright spots can not be observed by users, and the appearance of the users can not be influenced by the boss bright spots.
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.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.
The above description is only for the preferred embodiment of the present application, and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application are included in the protection scope of the present application.
Claims (10)
1. A backlight module, comprising:
the back plate comprises a back plate main body and a retaining wall part arranged at the edge of the back plate main body;
the middle rubber frame comprises a frame main body and an installation positioning part perpendicular to the frame main body, and the frame main body is sleeved on the retaining wall part;
the light guide plate is arranged on one side, close to the installation positioning part, of the back plate main body, and comprises a light guide plate main body and a first limiting boss arranged on the light guide plate main body, the first limiting boss protrudes out of the surface of one side, close to the installation positioning part, of the light guide plate main body, and the first limiting boss also protrudes out of the surface of one side, close to the frame main body, of the light guide plate main body;
the limiting membrane is arranged on one side, far away from the back plate main body, of the light guide plate main body, and the first limiting boss is configured to limit the optical membrane;
the retaining wall part is provided with an avoidance groove for avoiding the first limiting boss, and part of the structure of the first limiting boss extends into the avoidance groove.
2. The backlight module according to claim 1, wherein the number of the first position-limiting bosses is two, and two of the first position-limiting bosses are disposed at two opposite edges of the light guide plate body.
3. The backlight module according to claim 1, wherein the number of the first position-limiting bosses is three or four, and each of the first position-limiting bosses is disposed at a different edge of the light guide plate body.
4. The backlight module as claimed in claim 1, wherein the first position-limiting protrusion has a dimension of 1.5mm or more in a first direction perpendicular to a surface of the light guide plate body near the frame body.
5. The backlight module as claimed in claim 4, wherein a distance between a surface of the first position-limiting protrusion adjacent to the frame body and a surface of the light guide plate body adjacent to the frame body is 0.8mm to 1.0 mm.
6. The backlight module according to claim 1, wherein a distance between an edge of the optical film and the barrier wall portion is 0.002L or more, where L is a dimension of the optical film in a first direction perpendicular to a surface of the light guide plate body on a side close to the frame body.
7. The backlight module as claimed in claim 1, wherein a second limiting protrusion is disposed on a side of the mounting and positioning portion close to the optical film, the first limiting protrusion is disposed between the second limiting protrusion and the frame body, and the second limiting protrusion is opposite to the optical film.
8. A display device, comprising the backlight module according to any one of claims 1 to 7.
9. The display device according to claim 8, further comprising a liquid crystal display panel, wherein the liquid crystal display surface is disposed on a side of the mounting and positioning portion away from the light guide plate, the frame main body is connected to the liquid crystal display panel by a first adhesive tape, and the mounting and positioning portion is connected to the liquid crystal display panel by a second adhesive tape.
10. The display device according to claim 9, wherein the liquid crystal display panel comprises an effective display area and a peripheral area outside the effective display area, and a projection of the first limiting projection on the liquid crystal display panel to the effective display area has a minimum distance greater than 0.8 mm.
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| CN202121373905.5U CN216160947U (en) | 2021-06-21 | 2021-06-21 | Backlight module and display device |
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| CN202121373905.5U CN216160947U (en) | 2021-06-21 | 2021-06-21 | Backlight module and display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023226006A1 (en) * | 2022-05-27 | 2023-11-30 | 京东方科技集团股份有限公司 | Backlight module, display module and display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023226006A1 (en) * | 2022-05-27 | 2023-11-30 | 京东方科技集团股份有限公司 | Backlight module, display module and display device |
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