CN212749474U - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN212749474U CN212749474U CN202021573820.7U CN202021573820U CN212749474U CN 212749474 U CN212749474 U CN 212749474U CN 202021573820 U CN202021573820 U CN 202021573820U CN 212749474 U CN212749474 U CN 212749474U
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Abstract
The utility model relates to a show technical field, disclose a backlight unit and display device. The backlight module comprises a back plate, a reflecting sheet, a light guide plate and an optical film group, wherein the reflecting sheet, the light guide plate and the optical film group are sequentially stacked on the back plate; the first connecting part is arranged close to the outer edge of the optical film group and fixedly connected with the light guide plate and the light source; at least part of the second connecting part is convexly arranged on one side of the first connecting part close to the optical film group and is pressed on the optical film group. The utility model discloses a set up the connecting piece and carry out synchronous fixed to light guide plate and light source through the income light side at side income formula backlight unit, receive the influence expend with heat and contract with cold back of temperature when the light guide plate, can not produce the displacement because of light guide plate and light source and form the clearance, also can improve the light decay problem that consequently produces like this for display device has high reliability.
Description
Technical Field
The utility model belongs to the technical field of the display technology and specifically relates to a backlight module and display device are related to.
Background
Currently, the full-screen technology is an industry development trend and is more and more favored by users, and therefore, the frame of the existing notebook computer, mobile phone, tablet computer and the like which increasingly need the electronic equipment becomes narrow, and therefore the display screen also needs to be narrowed. Among them, a Liquid Crystal Display (LCD) has many advantages such as thin body, power saving, no radiation, and is widely used, and generally includes a Liquid Crystal Display panel and a backlight module for providing backlight to the Liquid Crystal Display panel.
In the prior art, as shown in fig. 1 and 2, when a display module is assembled, a light guide plate 1 in a backlight module is fixed on a back plate 3 by a light guide plate fixing glue 2 on a non-light-incident side. However, in this fixing manner, when the Light guide plate 1 expands due to high temperature, the Light Emitting Diode (LED) lamp 4 is pushed to move into the lamp housing formed by the back plate 3, and when the temperature returns to normal temperature, the Light guide plate 1 contracts, and at this time, a gap is formed between the Light guide plate 1 and the LED lamp 4 on the Light incident side, which may cause Light attenuation, thereby affecting the brightness of the backlight module.
SUMMERY OF THE UTILITY MODEL
The utility model provides a backlight module and display device to improve because light guide plate and light source relative movement produce the light decay problem that leads to behind the clearance, guarantee backlight module's luminance, and then improve display device's display quality.
On one hand, the embodiment of the utility model provides a backlight module includes the backplate and stacked in proper order reflector plate, light guide plate, the optical film group on the backplate, at least one side of light guide plate still is equipped with the light source, the light-emitting direction of light source is towards the light guide plate, backlight module still includes the connecting piece, the connecting piece is located one side that the light source kept away from the backplate; the connecting piece comprises a first connecting part and a second connecting part connected with the first connecting part; the first connecting part is arranged close to the outer edge of the optical film group and fixedly connected with the light guide plate and the light source; at least part of the second connecting part is arranged on one side, close to the optical diaphragm group, of the first connecting part in a protruding mode and is in compression joint with the optical diaphragm group.
Preferably, the first connecting portion is a rectangular parallelepiped structure, and a surface of at least a part of the first connecting portion facing the light source is pressed against the light guide plate and a top surface of the light source; the second connecting portion is fixed on the surface of the first connecting portion, which is far away from the light source, extends along the direction towards the optical film group and is fixedly connected with the surface of the optical film group, which is far away from the light guide plate.
Preferably, the optical diaphragm group is provided with a concave part in the thickness direction thereof, and the concave part is arranged at the position where the optical diaphragm group and the second connecting part are overlapped; the connecting piece comprises a convex part which is fixed on one side of the second connecting part close to the optical film group; the convex portion is fitted with the concave portion.
Preferably, the concave part is in a step shape, and the convex part has a structure matched with the shape of the concave part.
Preferably, the concave part is a through hole, and one end of the convex part, which is far away from the second connecting part, passes through the through hole and is then fixedly connected with the light guide plate.
Preferably, the connecting piece is of an integrally formed structure and made of plastic, the surface of the connecting piece facing the light source direction is white, and the rest part of the connecting piece is black.
Preferably, the light source comprises a light emitting diode.
Preferably, the back plate comprises a bottom plate and a side plate arranged on the bottom plate, and one end of the connecting piece far away from the optical diaphragm group is pressed on the side plate.
Preferably, the backplate includes bottom plate, curb plate and roof, the curb plate is located the bottom plate with between the roof, the bottom plate is located the light guide plate is kept away from one side of optical diaphragm group, the curb plate is located the outside of connecting piece, the roof is followed the tip of curb plate to the connecting piece direction extends and forms, the tip of roof with the connecting piece is kept away from the one end butt of optical diaphragm group.
Preferably, the backlight module further comprises a light shielding layer, the light shielding layer covers the surface of the connecting piece far away from one side of the light guide plate, and the light shielding layer extends to one side of the backboard far away from the connecting piece along the thickness direction of the backlight module from the outer edge of the connecting piece.
On the other hand, the embodiment of the utility model provides a still provides a display device, display device includes display panel and as above backlight unit, backlight unit does display panel provides the backlight.
The utility model discloses a display device who provides sets up the connecting piece and carries out synchronous fixed to light guide plate and light source in backlight unit's income light side for the relative position of light source and light guide plate is stable, receives the influence expend with heat and contract with cold back of temperature when the light guide plate, can not make to produce between light guide plate and the light source and be located the formation clearance, also can improve consequently like this and the light decay problem that produces, makes display device have high reliability.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
FIG. 1 is a schematic cross-sectional view of a non-incident side of a prior art display device;
FIG. 2 is a schematic cross-sectional view of a light incident side of a prior art display device;
fig. 3 is a schematic partial cross-sectional view of a display device according to an embodiment of the present invention;
fig. 4 is a schematic partial cross-sectional view of a display device according to a second embodiment of the present invention;
fig. 5 is a schematic perspective view of a stacked optical film set provided in an embodiment of the present invention;
fig. 6 is a schematic perspective view of a connecting member according to a second embodiment of the present invention;
fig. 7 is a schematic partial cross-sectional view of a display device according to a third embodiment of the present invention.
Detailed Description
In order to further explain the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, but not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example one
Fig. 3 is a schematic partial cross-sectional view of a display device according to an embodiment of the present invention.
Referring to fig. 3, a display device according to an embodiment of the present invention includes a display panel 200 and a backlight module 100 fixedly connected to the display panel 200, wherein the backlight module 100 provides a side-in type backlight source for the display panel 200.
The backlight module 100 includes a back plate 150, a reflective sheet 170, a light guide plate 120, a light source 130, and an optical film set 160. In the embodiment of the present invention, the backlight module 100 adopts a side-in type backlight source, i.e. at least one side of the periphery of the light guide plate 120 is provided with the light source 130, and the light emitting direction of the light source 130 faces the light guide plate 120. In this embodiment, the light source 130 is preferably but not limited to a light bar, generally, the light bar includes a circuit board and a light emitting element on the circuit board, the light emitting element may be a common Light Emitting Diode (LED) or a micro light emitting diode (such as a miniLED or a micro LED) with a smaller size, the number of the light emitting elements is not limited, the light emitting elements may be arranged according to actual needs, and the circuit board may be a PCB board or an FPC board.
Further, the backlight module 100 further includes a connector 110, the connector 110 is disposed adjacent to an outer edge of the optical film set 160, and the connector 110 is disposed at a side having the light source 130. Further, the connecting member 110 is disposed on a side of the light source 130 away from the back plate 150, and the connecting member 110 is fixedly connected to the light guide plate 120 and the light source 130, respectively, so that an excessive gap between the light guide plate 120 and the light source 130 is not generated by the fixed connection of the connecting member 110 in a direction perpendicular to the thickness of the backlight module 100. Specifically, as shown in fig. 3, a surface of the connection member 110 facing the light source 130 is at least partially pressed on the light emitting surface of the light guide plate 120 and the top surface (i.e., the surface away from the back plate 150) of the light source 130. Alternatively, the connecting member 110 may be fixedly connected to the light guide plate 120 and the light source 130 by adhesion. The connecting piece is preferably made of a material with certain hardness, so that the connecting piece is more stable and is not easy to deform; preferably, the surface of the connecting member 110 facing the light source 130 is white, the rest of the connecting member 110 is black, and the surface of the connecting member 110 close to the light source 130 is white, so that the connecting member 110 can play a role of "small white reflection" to reflect the light irradiated on the connecting member 110 into the light guide plate 120, thereby reducing the loss of light. The base material of the connecting member 110 is preferably black to provide a light shielding function, and the connecting member 110 may be made of, but not limited to, a plastic material, such as Polycarbonate (PC). In the first embodiment, the connecting member 110 is exemplarily in a rectangular parallelepiped structure, which is relatively simple and easy to assemble, but is not limited thereto.
Further, the back plate 150 includes a bottom plate 151 and a side plate 152 provided on the bottom plate 151. The bottom plate 151 and the side plate 152 together form a receiving cavity for receiving the reflective sheet 170, the light guide plate 120, the light source 130 and the optical film set 160. In order to make the structure more stable, one end of the connecting member 110 away from the optical film set 160 is pressed against the side plate 152, and as shown in fig. 3, the surface of the connecting member 110 facing the light source 130 is connected with one end of the side plate 152 away from the bottom plate 151 on the side away from the optical film set 160. Further, in order to achieve the stability of the module and the narrow bezel effect, the side of the connecting member 110 away from the optical film group 160 is flush with the outer edge of the side plate 152, but is not limited thereto.
The embodiment of the utility model provides a backplate need not to design such as prior art "lamp shade" structure, can make light guide plate and light source position stable in, can also make display device's frame narrow down. Because the light guide plate in the prior art is not fixed on the light incident side, in order to prevent the light guide plate from tilting on the light incident side, one end of the light guide plate on the light incident side needs to be inserted into the lampshade of the back plate, and the lampshade presses the light guide plate to play a role of preventing the light guide plate from tilting. And in this embodiment one, adopted the connecting piece to fix the light guide plate in the income light side of light guide plate, the width of connecting piece need not to be so wide like the lamp shade, also can improve the perk problem of light guide plate, consequently the utility model provides a narrower that display device's frame can be done, and then make display device's screen occupy the grow.
Further, as shown in fig. 3, the optical film set 160 may be a sandwich structure including an upper diffusion sheet, a prism sheet and a lower diffusion sheet (not specifically labeled) stacked in sequence from top to bottom, the lower diffusion sheet is close to the light guide plate 120 and is used for homogenizing the light emitted from the light source 130, the upper diffusion sheet is far from the light guide plate 120 and plays a role in protecting the backlight module 100, and the prism sheet is located between the upper and lower diffusion sheets and is used for concentrating the dispersed light in an angle atmosphere to emit the light, so as to improve the brightness in the angle range.
Further, the backlight module 100 further includes a light shielding layer 140, the light shielding layer 140 covers a surface of the connecting member 110 on a side away from the light guide plate 120, the light shielding layer 140 extends from an outer edge of the connecting member 110 to a side of the back plate 150 away from the connecting member 110 along a thickness direction of the backlight module 100, and the light shielding layer 140 plays a role of shielding light to prevent light leakage. The light-shielding layer 140 may be a light-shielding tape. When the display panel 200 is assembled with the backlight module 100, the display panel 200 can be fixed by disposing a double-sided tape between the light-shielding layer 140 and the display panel 200.
In the display device provided by the first embodiment, the connecting member 110 is disposed on the light incident side of the backlight module 100, so as to fix the light guide plate 120 and the light source 130 synchronously, and thus even when the light guide plate 120 is affected by temperature, expansion caused by heat and contraction caused by cold, the light guide plate 120 and the light source 130 are not displaced to form a gap, so that the problem of light attenuation caused by the displacement is also solved, and at least, the brightness can be improved by 5% -10%, so that the module has high reliability.
Furthermore, the embodiment of the utility model provides a narrower can be done to display device's frame, can realize the design of full face screen, is applicable to high account for the screen than the product such as cell-phone, panel computer, and has high reliability, and optics promotes.
Example two
Fig. 4 is a schematic partial cross-sectional view of a display device according to a second embodiment of the present invention; fig. 5 is a schematic perspective view of a stacked optical film set provided in an embodiment of the present invention; fig. 6 is a schematic perspective view of a connecting member according to a second embodiment of the present invention.
In the second embodiment, the display device includes a display panel 200 and a backlight module. Firstly, the connecting member 110 ' disposed in the backlight module includes a first connecting portion 111 ', the first connecting portion 111 ' is disposed adjacent to an outer edge of the optical film set 160 ', and the first connecting portion 111 ' is fixedly connected to the light guide plate 120 and the light source 130; the first connection portion 111' has a first surface facing the light source 130 and a second surface facing away from the light source 130; the first surface of the first connection portion 111' is at least partially area-pressed on the top surfaces of the light guide plate 120 and the light source 130. The first connecting portion 111' in the second embodiment is similar in structure and function to the connecting member 110 in the first embodiment.
The main differences between the second embodiment and the first embodiment are as follows: the connecting member 110 'in the second embodiment further includes a second connecting portion 112' connected to the first connecting portion 111 ', at least a portion of the second connecting portion 112' is protruded from a side of the first connecting portion 111 'close to the optical film set 160', and at least a portion of the second connecting portion 112 'is pressed against a surface of the optical film set 160' away from the light guide plate 120, which is better in fixing effect. Thus, it can also be understood that: in order to achieve a better fixing effect, the connecting piece 110' of the second embodiment is obtained by further improving the structure of the connecting piece 110 of the first embodiment.
Specifically, as shown in fig. 4, the second connecting portion 112 ' is located on a side of the first connecting portion 111 ' away from the light source 130, and a side of the second connecting portion 112 ' away from the first connecting portion 111 ' extends to above the optical film set 160 ' along a direction toward the optical film set 160 ' and is fixedly connected to a surface of the optical film set 160 ' away from the light guide plate 120. The second connecting portion 112 'and the first connecting portion 111' may be fixedly connected by means of adhesion, or may be integrally formed, but is not limited thereto; the second connecting portion 112 'and the optical film set 160' can also be fixed by, but not limited to, adhering.
Further, the optical film set 160 ' is further provided with a concave portion 164 ' in the thickness direction thereof, and the concave portion 164 ' is provided at a position where the optical film set 160 ' overlaps the second connection portion 112 '; accordingly, the connecting member 110 ' includes a convex portion 113 ', and the convex portion 113 ' is fixed to a side of the second connecting portion 112 ' close to the optical film group 160 '; the convex portions 113 'and the concave portions 164' are fitted and connected, and the number of the convex portions 113 'and the concave portions 164' is not limited and may be determined as required.
In the second embodiment, as shown in fig. 5 and 6, the concave portion 164 ' is stepped, and the convex portion 113 ' has a structure adapted to the shape of the concave portion 164 ', but is not limited thereto. Specifically, as shown in fig. 5, an upper diffusion sheet 161 ', a prism sheet 162 ', and a lower diffusion sheet 163 ' are sequentially stacked in an optical film group 160 ' from top to bottom, and the sizes of openings of the three films at the positions where the recesses 164 ' are formed are gradually decreased from layer to form a "step" shape; as shown in fig. 6, in order to match the structure of the concave portion 164 ', the convex portion 113 ' on the connecting member 110 ' also has an "inverted step" shape, so that the convex portion 113 ' and the concave portion 164 ' can be connected in a fitting manner. This serves to limit the position of the optical diaphragm assembly 160' on the one hand and also to provide a better fixation on the other hand. In other embodiments, the concave portion 164 'may also be a through hole, the shape of the convex portion 113' is matched with the through hole, and one end of the convex portion 113 'far away from the second connection portion 112' passes through the through hole and is fixedly connected to the light guide plate 120. The same parts as those in the first embodiment will not be described again.
In the second embodiment, the connecting member 110 'having the first connecting portion 111' and the second connecting portion 112 'is provided, so that the positional relationship among the light guide plate 120, the optical film set 160' and the light source 130 is more stable when the backlight module is assembled.
EXAMPLE III
Fig. 7 is a schematic partial cross-sectional view of a display device according to a third embodiment of the present invention.
The display device provided in the third embodiment is mainly different from the display device provided in the second embodiment in that: the back plate 150 includes a bottom plate 151 and a side plate 152, and the back plate 150 further includes a top plate 153, the side plate 152 is located between the bottom plate 151 and the top plate 153, the bottom plate 151 is located on one side of the light guide plate 120 away from the optical film set 160 ', the side plate 152 is located on the outer side of the connecting member 110 ', the top plate 153 extends along the end of the side plate 152 to the direction of the connecting member 110 ', and the end of the top plate 153 is abutted to one end of the connecting member 110 ' away from the optical film set 160 '.
In the third embodiment, the back plate 150 has a structure having a bottom plate 151, side plates 152 and a top plate 153, and although the shape of the back plate 150 is similar to that of the "lampshade" in the prior art, in the third embodiment, the top plate 153 does not need to be used to press the light guide plate 120, and therefore the top plate 153 does not need to be as wide as the prior art, so that the frame problem of the display device in the third embodiment can be improved. Although the display devices of the first and second embodiments are superior to the display device of the third embodiment in the effect of the narrow bezel, the structure of the third embodiment enables the edge of the display panel to be pressed on the top plate when the display panel is assembled with the backlight module, so that the assembled display device is firmer because the bearing capacity of the top plate is superior to that of the connecting member. It is understood that, in other embodiments, the connecting member may also be the structure described in the first embodiment, and the same parts as those in the first embodiment and the second embodiment are not described again.
The foregoing is a complete disclosure of the present invention, and in this specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including other elements not expressly listed, in addition to those elements listed.
In the present specification, the terms of front, rear, upper, lower and the like are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only used for the sake of clarity and convenience in technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A backlight module comprises a back plate, a reflecting sheet, a light guide plate and an optical diaphragm group, wherein the reflecting sheet, the light guide plate and the optical diaphragm group are sequentially stacked on the back plate;
the connecting piece comprises a first connecting part and a second connecting part connected with the first connecting part; the first connecting part is arranged close to the outer edge of the optical film group and fixedly connected with the light guide plate and the light source; at least part of the second connecting part is arranged on one side, close to the optical diaphragm group, of the first connecting part in a protruding mode and is in compression joint with the optical diaphragm group.
2. A backlight module according to claim 1, wherein the first connecting portion is a rectangular parallelepiped structure, and a surface of at least a part of the first connecting portion facing the light source is pressed against the top surfaces of the light guide plate and the light source; the second connecting portion is fixed on the surface of the first connecting portion, which is far away from the light source, extends along the direction towards the optical film group and is fixedly connected with the surface of the optical film group, which is far away from the light guide plate.
3. The backlight module according to claim 2, wherein the optical film group is provided with a recess in a thickness direction thereof, and the recess is provided at a position where the optical film group overlaps the second connecting portion; the connecting piece comprises a convex part which is fixed on one side of the second connecting part close to the optical film group; the convex portion is fitted with the concave portion.
4. The backlight module as claimed in claim 3, wherein the recess is stepped, and the protrusion has a shape matching the recess.
5. The backlight module according to claim 3, wherein the concave portion is a through hole, and one end of the convex portion away from the second connecting portion passes through the through hole and is then fixedly connected to the light guide plate.
6. The backlight module as claimed in claim 1, wherein the connecting member is of an integrally formed structure and made of plastic material, a surface of the connecting member facing the light source is white, and the rest of the connecting member is black.
7. The backlight module according to claim 1, wherein the back plate comprises a bottom plate and a side plate disposed on the bottom plate, and an end of the connecting member away from the optical film group is pressed against the side plate.
8. The backlight module according to claim 1, wherein the back plate comprises a bottom plate, a side plate and a top plate, the side plate is located between the bottom plate and the top plate, the bottom plate is located on a side of the light guide plate away from the optical film group, the side plate is located on an outer side of the connector, the top plate extends along an end of the side plate towards the connector, and an end of the top plate abuts against an end of the connector away from the optical film group.
9. The backlight module according to any one of claims 1 to 8, further comprising a light shielding layer covering a surface of the connector on a side away from the light guide plate, wherein the light shielding layer extends from an outer edge of the connector to a side of the back plate away from the connector along a thickness direction of the backlight module.
10. A display device, comprising a display panel and the backlight module of any one of claims 1 to 9 fixedly connected to the display panel, wherein the backlight module provides a lateral backlight source for the display panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202021573820.7U CN212749474U (en) | 2020-08-03 | 2020-08-03 | Backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021573820.7U CN212749474U (en) | 2020-08-03 | 2020-08-03 | Backlight module and display device |
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| CN212749474U true CN212749474U (en) | 2021-03-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114077097A (en) * | 2021-11-17 | 2022-02-22 | 合肥京东方显示光源有限公司 | Backlight module and display device |
| WO2023115478A1 (en) * | 2021-12-21 | 2023-06-29 | 武汉华星光电技术有限公司 | Display device and manufacturing method therefor |
-
2020
- 2020-08-03 CN CN202021573820.7U patent/CN212749474U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114077097A (en) * | 2021-11-17 | 2022-02-22 | 合肥京东方显示光源有限公司 | Backlight module and display device |
| WO2023115478A1 (en) * | 2021-12-21 | 2023-06-29 | 武汉华星光电技术有限公司 | Display device and manufacturing method therefor |
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