CN221946308U - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN221946308U CN221946308U CN202420181552.6U CN202420181552U CN221946308U CN 221946308 U CN221946308 U CN 221946308U CN 202420181552 U CN202420181552 U CN 202420181552U CN 221946308 U CN221946308 U CN 221946308U
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- 239000012788 optical film Substances 0.000 abstract description 37
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000009792 diffusion process Methods 0.000 description 52
- 239000012528 membrane Substances 0.000 description 16
- 239000010408 film Substances 0.000 description 14
- 239000000758 substrate Substances 0.000 description 14
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 4
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 210000000883 ear external Anatomy 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 235000009537 plain noodles Nutrition 0.000 description 1
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Abstract
本实用新型涉及显示技术领域，尤其涉及一种背光模组及显示装置。本实用新型提供的背光模组包括导光板、灯条、光学膜片组以及第一复合扩散片，其中，灯条位于导光板的一侧，并且灯条的出光方向朝向导光板，光学膜片组叠置于导光板的出光面上，第一复合扩散片贴附于光学膜片组上，并且第一复合扩散片位于光学膜片组靠近灯条的侧部。通过在光学膜片组靠近灯条的侧部贴附第一复合扩散片，从而可以均匀聚光点的光线，从而消除聚光点现象，提高显示质量，并且还能够满足背光模组轻薄化的设计。本实用新型还提供了一种显示装置，通过应用上述背光模组，消除了聚光点现象，提高了显示质量，并且满足了显示装置轻薄化的设计。
The utility model relates to the field of display technology, and in particular to a backlight module and a display device. The backlight module provided by the utility model includes a light guide plate, a light bar, an optical film group and a first composite diffuser, wherein the light bar is located on one side of the light guide plate, and the light emitting direction of the light bar is toward the light guide plate, the optical film group is stacked on the light emitting surface of the light guide plate, the first composite diffuser is attached to the optical film group, and the first composite diffuser is located on the side of the optical film group close to the light bar. By attaching the first composite diffuser to the side of the optical film group close to the light bar, the light of the focal point can be evenly distributed, thereby eliminating the focal point phenomenon, improving the display quality, and also meeting the light and thin design of the backlight module. The utility model also provides a display device, which eliminates the focal point phenomenon, improves the display quality, and meets the light and thin design of the display device by applying the above-mentioned backlight module.
Description
Technical Field
The present utility model relates to the field of display technologies, and in particular, to a backlight module and a display device.
Background
The display device comprises a display panel and a backlight module for providing a side-in backlight source for the display panel, so as to ensure that the display panel can normally display pictures. At present, the side-entry backlight technology is widely developed due to the characteristics of ultra-thin structure, realization of narrow frames and the like. In addition, the narrow frame causes the A value of the backlight module to be smaller and smaller, the A value is the length from the light emitting surface of the LED lamp in the backlight module to the display area (namely AA area) of the display device, as the light rays emitted by the LED lamps are emitted at a certain angle, the area where the light rays cannot shine can form a dark band among a plurality of LED lamps, and the light rays intersect to form light condensation, so that the phenomenon of alternating brightness and darkness is the light condensation point phenomenon, and the optical quality of the backlight module and the display effect of the display device are seriously affected. In addition, due to the light and thin design of the backlight module, the number of the optical film groups in the backlight module is small, so that the shielding performance on the light of the light incident side is poor, and the phenomenon of converging points is further aggravated.
Therefore, a backlight module and a display device are needed to solve the above problems.
Disclosure of utility model
The utility model aims to provide a backlight module and a display device, which can eliminate the phenomenon of a condensing point and improve the display quality on the basis of ensuring the light and thin design of the backlight module.
To achieve the purpose, the utility model adopts the following technical scheme:
A backlight module, comprising:
A light guide plate;
the light bar is positioned on one side of the light guide plate, and the light emergent direction of the light bar faces the light guide plate;
The optical film group is stacked on the light emitting surface of the light guide plate; and
The first composite diffusion sheet is attached to the optical film group and is positioned on the side portion, close to the light bar, of the optical film group.
Alternatively, the first composite diffusion sheet is coated with a light-shielding coating.
As an alternative, the light bar includes a circuit substrate and a plurality of LED lamps, the plurality of LED lamps are arranged on the circuit substrate at intervals along the length direction of the circuit substrate, and the light emitting direction of the LED lamps faces the light guide plate;
the first composite diffusion sheet is in an elongated shape, and extends along the length direction of the circuit substrate.
As an alternative, the light bar includes a circuit substrate and a plurality of LED lamps, the plurality of LED lamps are arranged on the circuit substrate at intervals along the length direction of the circuit substrate, and the light emitting direction of the LED lamps faces the light guide plate;
The backlight module comprises a plurality of first composite diffusion sheets which are arranged at intervals along the length direction of the circuit substrate, and each LED lamp is opposite to one first composite diffusion sheet along the light emitting direction.
As an alternative, the backlight module further includes a second composite diffusion sheet, an ear is disposed on an outer side wall of the optical film set in an outward extending manner, and the second composite diffusion sheet is attached to the ear.
Alternatively, the second composite diffusion sheet is coated with a light-shielding coating.
As an alternative, the optical film group at least includes a first optical film and a second optical film that are stacked in sequence, where the first optical film is stacked on the light emitting surface of the light guide plate, and the second optical film is attached with the first composite diffusion sheet.
As an alternative, the backlight module further includes:
the back plate, the light guide plate and the lamp strip are both positioned in the lampshade formed by the back plate.
A display device comprising a display panel and a backlight module as described above, the backlight module being configured to provide a side-entry backlight for the display panel.
Alternatively, the first composite diffusion sheet is sandwiched between the display panel and the optical film group.
The utility model has the beneficial effects that: the utility model provides a backlight module which comprises a light guide plate, a light bar, an optical film group and a first composite diffusion sheet, wherein the light bar is positioned on one side of the light guide plate, the light emitting direction of the light bar faces to the light guide plate, the optical film group is superposed on the light emitting surface of the light guide plate, the first composite diffusion sheet is attached to the optical film group, and the first composite diffusion sheet is positioned on the side part of the optical film group, which is close to the light bar. The first composite diffusion sheet is attached to the side part of the optical film group, close to the light bar, and the light of the light collecting point on the light entering side can be uniformly transmitted through the first composite diffusion sheet, so that the light collecting point phenomenon is eliminated, the optical quality of the backlight module is improved, the light shielding of the light entering side is realized without increasing the number of the formed films of the optical film group, and the light and thin design of the backlight module is satisfied.
The utility model also provides a display device, which eliminates the phenomenon of a converging point by applying the backlight module, improves the display quality of the display device and meets the design of light and thin design of the display device.
Drawings
Fig. 1 is a partial structural sectional view of a display device according to a first embodiment of the present utility model;
FIG. 2 is a front view of a first composite diffusion sheet attached to a composite membrane according to an embodiment of the present utility model;
FIG. 3 is a side view of a first composite diffusion sheet attached to a composite membrane according to an embodiment of the present utility model;
FIG. 4 is a front view of a second composite diffusion sheet attached to a composite membrane according to an embodiment of the present utility model;
Fig. 5 is a front view of a first composite diffusion sheet according to a second embodiment of the present utility model attached to a composite membrane.
In the figure:
100. A backlight module; 200. a display panel; 1. a light guide plate; 2. a light bar; 21. a circuit substrate; 22. an LED lamp; 3. an optical film set; 31. a lower diffusion membrane; 32. a prismatic film; 33. a composite membrane; 4. a first composite diffusion sheet; 5. a second composite diffusion sheet; 6. a back plate; 7. a reflection sheet; 8. a light shielding layer; 9. and a light reflecting layer.
Detailed Description
In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the utility model more clear, the technical scheme of the utility model is further described below by a specific embodiment in combination with the attached drawings.
In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
Example 1
Fig. 1 is a partial structural cross-sectional view of a display device according to an embodiment of the present utility model, as shown in fig. 1, the present embodiment provides a display device, which includes a display panel 200 and a backlight module 100, where the backlight module 100 can provide a side-in backlight for the display panel 200, so as to ensure normal display of the display device.
Specifically, as shown in fig. 1, the backlight module 100 includes a back plate 6, a light guide plate 1, a light bar 2, and an optical film set 3, and in this embodiment, the back plate 6 includes, for example, a bottom plate, a first side plate vertically connected to the bottom plate, and a second side plate vertically connected to the first side plate, i.e. the second side plate is parallel to the bottom plate and extends along a direction close to the light guide plate 1. The second side plate of the back plate 6 is also used for carrying the display panel 200. The bottom plate, the first side plate and the second side plate of the back plate 6 are enclosed to form a lampshade. Wherein, light guide plate 1 and lamp strip 2 all are located the lamp shade that backplate 6 formed, and lamp strip 2 is located one side of light guide plate 1 to the light-emitting direction of lamp strip 2 is towards light guide plate 1, and lamp strip 2 is used for providing the light source for display device, and light guide plate 1 is used for turning into the area light source with the line light source that lamp strip 2 sent, and optical film piece group 3 stacks on the play plain noodles of light guide plate 1, and optical film piece group 3 can diffuse and carry out the homogeneous treatment with the area light source that light guide plate 1 sent, thereby guarantees that display panel 200 shows more clearly.
In this embodiment, the optical film set 3 includes at least a first optical film and a second optical film, where the first optical film is stacked on the light emitting surface of the light guide plate 1, and specifically, the first optical film is, for example, a lower diffusion film 31, and the second optical film is, for example, a composite film 33, and in this embodiment, the optical film set 3 further includes a prism film 32 disposed between the lower diffusion film 31 and the composite film 33. The lower diffusion film 31 is used for homogenizing the surface light source emitted from the light guide plate 1, the prism film 32 is used for concentrating the dispersed light within a certain angle range and emitting the dispersed light, the brightness within the angle range is improved, and the composite film 33 can play a role in protecting the backlight module 100. The above is merely illustrative, and in other embodiments, the optical film set 3 may also include other optical films, without limitation.
In this embodiment, the light bar 2 includes a circuit substrate 21 and a plurality of LED lamps 22, where the plurality of LED lamps 22 are disposed on the circuit substrate 21 at intervals along the length direction of the circuit substrate 21, and the light emitting direction of the LED lamps 22 is toward the light guide plate 1, thereby ensuring the display effect of the display device. Specifically, the LED lamp 22 may be a general LED or a micro LED having a smaller size, and the circuit board 21 may be a PCB or FPC board.
Optionally, as shown in fig. 1, the backlight module 100 further includes a light shielding layer 8, where the light shielding layer 8 is attached to the outer portion of the second side plate of the back plate 6, and the light shielding layer 8 is used for preventing light emitted by the LED lamp 22 from leaking out of a lampshade formed by the back plate 6, so as to play a certain light shielding role, thereby ensuring brightness of the backlight module 100.
Optionally, as shown in fig. 1, the backlight module 100 further includes a reflective layer 9, where the reflective layer 9 is disposed inside the second side plate of the back plate 6, and the reflective layer 9 is located above the light guide plate 1 and the light bar 2, and since the surface of the reflective layer 9 facing the direction of the light bar 2 is white, the light irradiated onto the reflective layer 9 is reflected onto the light guide plate 1, so that the loss of light is reduced, and the brightness of the backlight module 100 is ensured.
Optionally, as shown in fig. 1, the backlight module 100 further includes a reflective sheet 7, where the reflective sheet 7 is sandwiched between the light guide plate 1 and the bottom plate of the back plate 6, and the reflective sheet 7 is located below the light guide plate 1, and the reflective sheet 7 can reflect light below the light guide plate 1, so as to increase the light utilization rate.
In the prior art, the narrow frame of the display device causes the value a of the backlight module to be smaller and smaller, the value a is the length from the light emitting surface of the LED lamp in the backlight module to the display area (i.e., the AA area) of the display device, and as the light emitted by the LED lamp is emitted at a certain angle, the area where the light cannot reach can form a dark band between a plurality of LED lamps, and the light is condensed at the place where the light crosses, so that the phenomenon of alternating brightness and darkness is the phenomenon of condensed spots, which seriously affects the optical quality of the backlight module and the display effect of the display device. In addition, due to the light and thin design of the backlight module, the number of the optical film groups in the backlight module is small, so that the shielding performance on the light of the light incident side is poor, and the phenomenon of converging points is further aggravated.
Fig. 2 is a front view of a first composite diffusion sheet 4 attached to a composite membrane 33 according to a first embodiment of the present utility model; fig. 3 is a side view of a first composite diffusion sheet 4 attached to a composite membrane 33 according to an embodiment of the present utility model. In order to solve the above-mentioned problems, as shown in fig. 1 to 3, the backlight module 100 provided in this embodiment further includes a first composite diffusion sheet 4, the first composite diffusion sheet 4 is attached to the composite membrane 33, and the first composite diffusion sheet 4 is located at a side portion of the composite membrane 33 close to the LED lamp 22. By attaching the first composite diffusion sheet 4 to the side of the composite film 33 close to the LED lamp 22, the light of the light collecting point on the light incident side can be uniformly transmitted through the first composite diffusion sheet 4, so that the light collecting point phenomenon is eliminated, the optical quality of the backlight module 100 is improved, the shielding of the light on the light incident side is realized without increasing the number of the film constituting the optical film group 3, and the light and thin design of the backlight module 100 is satisfied.
The display device provided in this embodiment eliminates the phenomenon of converging point by applying the backlight module 100, improves the display quality of the display device, and also satisfies the design of light and thin display device.
In this embodiment, the first composite diffusion sheet 4 is coated with a light-shielding coating, for example, black paint. Thereby, the light of the condensing point on the light-in side can be absorbed, and the condensing point phenomenon is further improved. In this embodiment, the haze of the first composite diffusion sheet 4 may be adjusted according to the requirement.
As shown in fig. 1, in this embodiment, the first composite diffusion sheet 4 is sandwiched between the display panel 200 and the light composite membrane 33, so that the first composite diffusion sheet 4 plays a supporting role on the display panel 200, thereby improving the compression resistance of the whole display device and avoiding the mechanical fragmentation problem. It should be noted that, the thickness of the first composite diffusion sheet 4 is set according to the gap between the display panel 200 and the light composite film 33, so as to ensure the supporting effect of the first composite diffusion sheet 4 on the display panel 200.
In this embodiment, as shown in fig. 2, the backlight module 100 includes a plurality of first composite diffusion sheets 4 arranged at intervals along the length direction of the circuit substrate 21, and each LED lamp 22 is opposite to one first composite diffusion sheet 4 along the light emitting direction thereof, so that each light collecting portion of each first composite diffusion sheet 4 performs light-homogenizing treatment, thereby eliminating the light collecting point phenomenon, and the first composite diffusion sheets 4 do not need to be integrally laid on the light incident side of the light composite film 33, thereby reducing the cost.
Fig. 4 is a front view of a second composite diffusion sheet 5 attached to a composite membrane 33 according to an embodiment of the present utility model. Optionally, as shown in fig. 4, the backlight module 100 provided in this embodiment further includes a second composite diffusion sheet 5, an ear is disposed on an outer side wall of the composite membrane 33 in an outward extending manner, and the second composite diffusion sheet 5 is attached to the ear. By attaching the second composite diffusion sheet 5 to the outer ear of the composite membrane 33, the leaked light around the composite membrane 33 can be uniformly treated, and the problem of light leakage can be improved.
In this embodiment, the second composite diffusion sheet 5 is coated with a light-shielding coating, for example, black paint. By coating the light shielding coating on the second composite diffusion sheet 5, absorption of external leakage light is realized, and the problem of light leakage is further improved.
Example two
The display device provided in this embodiment is substantially the same as the first embodiment, and the display device provided in this embodiment is different from the first embodiment in that: fig. 5 is a front view of the first composite diffusion sheet 4 according to the second embodiment of the present utility model attached to the composite membrane 33. As shown in fig. 5, in the present embodiment, the first composite diffusion sheet 4 is elongated, and the first composite diffusion sheet 4 extends along the length direction of the circuit substrate 21, so that the effect of the first composite diffusion sheet 4 on the treatment of the light of the converging point on the light incident side is further ensured, and the effect of eliminating the converging point phenomenon is further ensured.
The above examples of the present utility model are only illustrative of the present utility model and are not intended to limit the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.
Claims (10)
1. A backlight module, comprising:
a light guide plate (1);
the light bar (2) is positioned on one side of the light guide plate (1), and the light emitting direction of the light bar (2) faces the light guide plate (1);
an optical film group (3), wherein the optical film group (3) is overlapped on the light-emitting surface of the light guide plate (1); and
The first composite diffusion sheet (4) is attached to the optical film group (3), and the first composite diffusion sheet (4) is positioned on the side portion, close to the light bar (2), of the optical film group (3).
2. A backlight module according to claim 1, wherein the first composite diffusion sheet (4) is coated with a light-shielding coating.
3. A backlight module according to claim 1 or 2, wherein the light bar (2) comprises a circuit substrate (21) and a plurality of LED lamps (22), the plurality of LED lamps (22) are arranged on the circuit substrate (21) at intervals along the length direction of the circuit substrate (21), and the light emitting direction of the LED lamps (22) is toward the light guide plate (1);
the first composite diffusion sheet (4) is elongated, and the first composite diffusion sheet (4) extends in the longitudinal direction of the circuit board (21).
4. A backlight module according to claim 1 or 2, wherein the light bar (2) comprises a circuit substrate (21) and a plurality of LED lamps (22), the plurality of LED lamps (22) are arranged on the circuit substrate (21) at intervals along the length direction of the circuit substrate (21), and the light emitting direction of the LED lamps (22) is toward the light guide plate (1);
The backlight module comprises a plurality of first composite diffusion sheets (4) which are arranged at intervals along the length direction of the circuit substrate (21), and each LED lamp (22) is opposite to one first composite diffusion sheet (4) along the light emitting direction.
5. A backlight module according to claim 1, further comprising a second composite diffusion sheet (5), wherein the outer side wall of the optical film group (3) is provided with an ear in an outward extending manner, and the second composite diffusion sheet (5) is attached to the ear.
6. A backlight module according to claim 5, wherein the second composite diffusion sheet (5) is coated with a light-shielding coating.
7. A backlight module according to claim 1, wherein the optical film group (3) comprises at least a first optical film and a second optical film which are stacked in sequence, the first optical film is stacked on the light emitting surface of the light guide plate (1), and the first composite diffusion sheet (4) is attached to the second optical film.
8. A backlight module according to claim 1, further comprising:
The back plate (6), the light guide plate (1) and the lamp strip (2) are both positioned in the lampshade formed by the back plate (6).
9. A display device comprising a display panel (200) and a backlight module according to any of claims 1-8, the backlight module being configured to provide a side-in backlight for the display panel (200).
10. The display device according to claim 9, wherein the first composite diffusion sheet (4) is sandwiched between the display panel (200) and the optical film group (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420181552.6U CN221946308U (en) | 2024-01-25 | 2024-01-25 | Backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420181552.6U CN221946308U (en) | 2024-01-25 | 2024-01-25 | Backlight module and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221946308U true CN221946308U (en) | 2024-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420181552.6U Active CN221946308U (en) | 2024-01-25 | 2024-01-25 | Backlight module and display device |
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| Country | Link |
|---|---|
| CN (1) | CN221946308U (en) |
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2024
- 2024-01-25 CN CN202420181552.6U patent/CN221946308U/en active Active
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