CN209911719U - Backlight module, display module and display device - Google Patents
Backlight module, display module and display device Download PDFInfo
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- CN209911719U CN209911719U CN201920867683.9U CN201920867683U CN209911719U CN 209911719 U CN209911719 U CN 209911719U CN 201920867683 U CN201920867683 U CN 201920867683U CN 209911719 U CN209911719 U CN 209911719U
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Abstract
The utility model discloses a backlight module, display module and display device, wherein, this backlight module includes: the backlight device comprises a backlight carrier plate, a light source and a light source, wherein the backlight carrier plate is provided with a plurality of light sources; the optical regulation and control film is positioned on one side of the backlight carrier plate, where the light source is arranged, the optical regulation and control film comprises a body and a dimming part arranged in the peripheral extending direction of the body, and the cross section thickness of the dimming part is gradually reduced from the connection part of the dimming part and the body. The utility model discloses backlight unit realizes even leaded light, improves user's visual effect.
Description
Technical Field
The utility model relates to a display device technical field, in particular to backlight unit, application backlight unit's display module assembly and display device.
Background
In the structure of the direct type backlight module, the light source and the circuit structure are arranged at the bottom of the backlight source. After the light source emits light, the light is scattered by the bottom reflector plate and the surface diffusion plate, and then the light is uniformly guided out to the display area. However, the light is concentrated in the middle of the display area compared to the edge, resulting in higher brightness in the middle of the display area than in the corners, that is, the dark band is formed in the display area due to the different light reception at the edge and the middle of the display area.
The above is only for the purpose of assisting understanding of the technical solutions of the present invention, and does not represent an admission that the above is the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a backlight module, aim at how to solve straight following formula backlight module's inhomogeneous technical problem of luminance.
In order to achieve the above object, the present invention provides a backlight module applied to a display device. The backlight module includes:
the backlight device comprises a backlight carrier plate, a light source and a light source, wherein the backlight carrier plate is provided with a plurality of light sources; and
the backlight carrier plate comprises a light source, an optical regulation and control film, wherein the optical regulation and control film is positioned on one side of the backlight carrier plate, wherein the light source is arranged on the side of the backlight carrier plate, the optical regulation and control film comprises a body and a dimming part arranged in the peripheral extending direction of the body, and the cross section thickness of the dimming part is gradually reduced from the joint of the dimming part and the body.
In an embodiment of the present invention, a cambered surface is formed on a surface of the light modulation part facing the backlight carrier;
and/or an arc surface is formed on the surface of the light adjusting part back to the backlight carrier plate.
In an embodiment of the present invention, on the cross section of the optical control film, a central axis of the cross section of the light adjusting portion is defined as an extension line L, a connection point of the light adjusting portion and the body is P, an end point of the light adjusting portion is J, and an included angle formed between the extension line L and the intersecting line JP is defined as θ, and θ is greater than 0 ° and less than 90 °.
In an embodiment of the present invention, a vertical distance from an end of the light adjusting portion away from the body to the body is defined as W;
and defining the shortest vertical distance from the light source to the edge of the backlight carrier plate as D, wherein D is less than or equal to W.
In an embodiment of the present invention, the distance from the body to the backlight carrier is defined as H, and H is greater than or equal to 8mm and less than or equal to 15 mm.
In an embodiment of the present invention, the body and the light adjusting portion are integrally formed by thermal molding.
In an embodiment of the present invention, the optical control film includes at least two films, and a wedge-shaped edge is disposed on a periphery of each of the films;
at least two the diaphragm hot pressing form the body, at least two the wedge limit hot pressing of diaphragm week side forms light modulation portion.
In an embodiment of the present invention, the optical control film is made of acrylic material.
The utility model discloses still provide a display module assembly. The display module assembly includes liquid crystal glazing and backlight unit, backlight unit includes:
the backlight carrier plate is provided with a plurality of light sources which are arranged in an array; and
the backlight module comprises a backlight carrier plate, an optical regulation and control film and a light source, wherein the backlight carrier plate is arranged on one side of the backlight carrier plate facing to the plurality of light sources, the optical regulation and control film is arranged at intervals with the plurality of light sources, the optical regulation and control film comprises a body and a light adjusting part arranged in the peripheral extending direction of the body, and the cross section thickness of the light adjusting part is gradually reduced from the joint of the light adjusting part and the body;
the liquid crystal glass is arranged on one side of the optical regulation and control film, which faces away from the backlight carrier plate.
The utility model discloses still provide a display device. The display module assembly includes liquid crystal glazing and backlight unit, backlight unit includes:
the backlight device comprises a backlight carrier plate, a light source and a light source, wherein the backlight carrier plate is provided with a plurality of light sources; and
the optical regulation and control film is positioned on one side of the backlight carrier plate, where the light source is arranged, the optical regulation and control film comprises a body and a dimming part arranged in the peripheral extending direction of the body, and the cross section thickness of the dimming part is gradually reduced from the connection part of the dimming part and the body;
the liquid crystal glass is arranged on one side, back to the backlight carrier plate, of the optical regulation and control film;
or, display module assembly includes backlight unit, backlight unit includes:
the backlight device comprises a backlight carrier plate, a light source and a light source, wherein the backlight carrier plate is provided with a plurality of light sources; and
the backlight carrier plate comprises a light source, an optical regulation and control film, wherein the optical regulation and control film is positioned on one side of the backlight carrier plate, wherein the light source is arranged on the side of the backlight carrier plate, the optical regulation and control film comprises a body and a dimming part arranged in the peripheral extending direction of the body, and the cross section thickness of the dimming part is gradually reduced from the joint of the dimming part and the body.
The technical scheme of the utility model is that the optical regulation and control film is arranged at a distance from the bottom wall of the backlight support plate, and the structure of the light source is arranged on the backlight support plate, namely, the light source is arranged between the optical regulation and control film and the bottom wall, the light source emits light, and the refraction and scattering of the light are realized through the optical regulation and control film, so that the light is led out to the liquid crystal panel; on the other hand, the optical control film comprises a body and a light adjusting part arranged on the peripheral extending direction of the body, namely, the light adjusting part is arranged on the peripheral extending direction of the body, the thickness of the light adjusting part is gradually reduced from the optical control film, understandably, the thickness of one end, close to the body, of the light adjusting part is larger than the thickness of one end, far away from the body, of the light adjusting part, so that when a light source positioned on the backlight carrier plate emits light, the light irradiates on the light adjusting part, the thickness of one side, far away from the body, of the light adjusting part is lower, the reflection effect on the light is lower, more light is enabled to be transmitted through one side, far away from the body, of the light adjusting part, the light emitting rate on the peripheral side of.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a backlight module according to an embodiment of the present invention;
FIG. 2 is a schematic view of an assembly structure of the backlight module shown in FIG. 1;
FIG. 3 is a schematic structural diagram of the optical modulation film of FIG. 2;
fig. 4 is a partially enlarged view of a portion a in fig. 3.
The reference numbers illustrate:
the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a backlight module.
In an embodiment of the present invention, as shown in fig. 1 and shown in fig. 2, fig. 3 and fig. 4, the backlight module includes: a backlight carrier plate 1 and an optical regulating film 2.
The backlight device comprises a backlight carrier plate 1, wherein the backlight carrier plate 1 is provided with a plurality of light sources 11; in an embodiment of the present invention, the light source 11 is a light emitter for illuminating a certain area, and it is understood that the light source 11 can be a bar-shaped light source 11, a point scattering type light source 11 and/or a ring-shaped light source 11; on the other hand, the light source 11 may also be a light emitting diode, an energy saving lamp, a fluorescent lamp, a halogen lamp and/or an incandescent lamp, and is not limited specifically herein on the premise that the light emission can be realized. Optionally, a plurality of light sources 11 are arranged in an array on the backlight carrier 1.
The backlight carrier plate 1 comprises an optical regulation and control film 2, the optical regulation and control film 2 is positioned on one side of the backlight carrier plate 1, which is provided with a light source 11, the optical regulation and control film 2 comprises a body 22 and a dimming part 21 arranged in the peripheral extending direction of the body 22, and the cross section thickness of the dimming part 21 is gradually decreased from the connection part of the dimming part 21 and the body 22. In an embodiment of the present invention, the optical control film 2 may be connected to the backlight carrier 1, that is, a mounting plate structure (not shown) may be disposed around the backlight carrier 1, the mounting plate structure is provided with a sliding groove and/or a positioning pin structure, and the optical control film 2 may be connected to the backlight carrier 1 through the sliding groove and/or the positioning pin; on the other hand, a slot structure (not shown) and/or a rib structure (not shown) may be disposed on the optical modulation film 2 to connect with the backlight carrier 1 through the slot structure and/or the rib structure matching with the sliding slot and/or the positioning pin structure. In an embodiment of the present invention, the optical control film 2 is disposed at an interval from the plurality of light sources 11.
In the embodiment, in order to realize that the backlight carrier 1 can uniformly emit light, the backlight carrier 1 is provided with a plurality of rows of light sources 11 arranged linearly, and two adjacent light sources 11 are spaced at a constant distance, and a plurality of light sources 11 are spaced at a predetermined distance to form a specific array. Optionally, the interval between two adjacent light sources 11 is greater than and/or equal to 1mm, and is not particularly limited herein on the premise that sufficient illumination can be achieved.
In this embodiment, in order to control the light emitting or turning off of the light source 11 on the backlight carrier 1, the backlight module may include a flexible printed circuit board, the flexible printed circuit board is disposed on the backlight carrier 1, and the light source 11 is electrically connected to the flexible printed circuit board. Optionally, in order to enhance the light scattering of the light source 11, a scattering film member may be disposed at the light source 11, for example: the scattering membrane piece is plastic or silica gel goods, is provided with the line through the surface at the scattering membrane piece, and the line can be annular line and or bar line.
In the embodiment, by adopting a structure that the optical regulation and control film 2 is arranged at a distance from the bottom wall of the backlight carrier plate 1, and the light source 11 is arranged on the backlight carrier plate 1, that is, the light source 11 is arranged between the optical regulation and control film 2 and the bottom wall, the light source 11 emits light, and the refraction and scattering of the light are realized through the optical regulation and control film 2, so as to realize the purpose of guiding the light to the liquid crystal panel; on the other hand, the optical control film 2 includes a body 22 and a light modulation part 21 disposed on the peripheral extending direction of the body 22, that is, by adopting the light modulation part 21 on the peripheral extending direction of the body 22 and gradually decreasing the thickness of the light modulation part 21 from the optical control film 2, it can be understood that the thickness of the end of the light modulation part 21 adjacent to the body 22 is larger than the thickness of the end of the light modulation part 21 away from the body 22, so that when the light source 11 on the backlight carrier plate 1 emits light, the light irradiates on the light modulation part 21, the thickness of the side of the light modulation part 21 away from the body 22 is lower, the reflection effect on the light is lower, and more light is transmitted through the side of the light modulation part 21 away from the body 22, so as to improve the light emitting rate on the peripheral side of the backlight module, achieve uniform light guiding, and.
The utility model discloses an in the embodiment, optics regulation and control membrane 2 is the ya keli material, that is to say, body 22 and light modulation part 21 also make for the ya keli material, realizes the integrative thermoplastic molding of body 22 and light modulation part 21 through hot melt yakeli material. Alternatively, the body 22 and the light adjusting unit 21 may be made of acrylic material, and the body 22 and the light adjusting unit 21 may be integrally formed by thermal compression bonding.
In an embodiment of the present invention, in order to enhance the stability of the light source 11 set in the backlight carrier 1, a plurality of holding grooves arranged in an array may be disposed on the backlight carrier 1, and the light source 11 is held in the holding grooves.
In an embodiment of the present invention, the cross section of the light adjusting portion 21 may be a prismatic structure, a rectangular structure, a trapezoidal structure, or an arc structure, and even the cross section of the light adjusting portion 21 may be an irregular shape, and no specific limitation is made again on the premise of scattering or refraction of light.
Optionally, the surface of the light adjusting part 21 facing the backlight carrier 1 is formed with a cambered surface. In the present embodiment, by adopting the structure that the surface of the light modulation part 21 facing the backlight carrier plate 1 is formed with the arc surface, it can be understood that the light modulation part 21 forms the light-gathering arc surface facing the backlight carrier plate 1, that is, the light-gathering arc surface is used to increase the surface area formed by the light modulation part 21 facing the backlight carrier plate 1, and the light introduction is enhanced by increasing the surface area. Thus, when the light source 11 emits light, the light is guided to the light adjusting portion 21 through the light-gathering arc surface, and the light adjusting portion 21 guides the light out, so as to enhance the light-emitting rate of the peripheral side of the backlight module.
Optionally, a surface of the light modulation part 21 facing away from the backlight carrier 1 is formed with a cambered surface. In this embodiment, a structure that an arc surface is formed on the surface of the light modulation part 21 facing away from the backlight carrier 1 is adopted, that is, the surface of the light modulation part 21 facing away from the backlight carrier 1 is protruded to form a scattering arc surface, and after the light passes through the light modulation part 21, the light is scattered by the scattering arc surface by combining the scattering effect of the scattering arc surface, so as to enhance the scattering effect of the optical modulation film 2 and avoid forming local bright spots.
Alternatively, as shown in fig. 3 and 4, on the cross section of the optical modulation film 2, a central axis of the cross section of the light modulation part 21 is defined as an extension line L, a connection point of the light modulation part 21 and the body 22 is P, an end point of the light modulation part 21 is J, and an included angle formed between the extension line L and the intersection line JP is defined as θ, and 0 ° < θ < 90 °.
In an embodiment of the present invention, on the cross section of the optical control film 2, the central axis of the cross section of the light modulation part 21 is defined as the extension line L, the connection point of the light modulation part 21 and the body 22 is P, the end point of the light modulation part 21 is J, the included angle formed between the extension line L and the intersection line JP is defined as θ, θ is greater than 0 ° < 90, that is, the plane set at a certain angle with the body 22 is formed on the side of the light modulation part 21 opposite to the backlight carrier plate 1, when the light emitted from the light source 11 passes through the body 22 and the light modulation part 21, the light is guided to the plane where the intersection line JP is located through the refraction of the light modulation part 21, and then the light is guided to the outside; on the other hand, when the light modulation part 21 is formed with a plane which is arranged at a certain angle with the body 22 on the side facing the backlight carrier plate 1, due to the plane with a certain gradient, the side of the light modulation part 21 away from the body 22 is thinner than the side of the light modulation part 21 adjacent to the body 22, so that the refraction and reflection of the side of the light modulation part 21 away from the body 22 to light rays are reduced, the light passing is facilitated, the light transmittance of the side of the light modulation part 21 away from the body 22 is improved, and further the uniform light transmittance of the optical regulation film 2 is realized.
In an embodiment of the present invention, the light modulation part 21 is formed with a cambered surface facing away from the surface of the backlight carrier 1, that is, the light modulation part 21 is formed with a convex portion, so as to realize the light converging effect of the light modulation part 21, so as to enhance the light emitting efficiency of guiding light to the light modulation part 21.
It is understood that the angle formed between the extension line L and the intersection line JP is defined as θ, which is 30 °. When θ is 30 °, the light passes through the light adjusting portion 21, and the light is guided to the light emitting side of the light adjusting portion 21 by the refraction of the light adjusting portion 21, and it is understood that the light transmission intensity of the light adjusting portion 21 is gradually increased in the direction of decreasing the thickness of the light adjusting portion 21.
In an embodiment of the present invention, θ may also be 45 °. When θ is 45 °, the light source 11 in the longitudinal direction of the light adjusting portion 21 emits light rays in combination with the internal angle of the light adjusting portion 21 and the law of refraction, when the light rays can vertically irradiate the light adjusting portion 21, the light adjusting portion 21 refracts the light rays, an incident surface is designed as a first refraction surface, an intersecting line JP is designed as a second refraction surface, the light rays are refracted and scattered in the light adjusting portion 21 through the first refraction surface, the light incident surface is deflected by a certain angle in combination with the law of refraction, one side of the light adjusting portion 21 is thinner, the thinner side facilitates the light rays to be transmitted out, so that most of the light rays are guided to the outside of the light adjusting portion 21 through the intersecting line JP as the refraction surface, the refraction and scattering of the light rays are realized, and the uniform light guiding of the optical control film 2 is realized.
In an embodiment of the present invention, θ may also be 60 °.
Optionally, a vertical distance from one end of the light adjusting portion 21 away from the main body 22 to the main body 22 is defined as W; the shortest vertical distance from the light source 11 to the edge of the backlight carrier 1 is defined as D, and D is less than or equal to W. It is understood that the light source 11 may be disposed corresponding to the light-adjusting portion 21 to increase the probability of the light entering the light-adjusting portion 21, and on the other hand, the incident angle of the light entering the light-adjusting portion 21 is reduced, so that the light is easier to be guided out.
Optionally, as shown in fig. 2, the distance from the main body 22 to the backlight carrier 1 is defined as H, and H is greater than or equal to 8mm and less than or equal to 15 mm. In this embodiment, the distance from the main body 22 to the backlight carrier 1 is 8mm to 15mm, so as to increase the distance between the backlight carrier 1 and the light source 11, enhance the scattering range of the light emitted by the light source 11, and avoid the accident that the light is converged to a point to form a bright spot.
Alternatively, the body 22 and the dimming portion 21 are integrally formed by thermal molding. By adopting the structure that the body 22 and the dimming part 21 are integrally formed in a thermoplastic manner, the step of installing the body 22 and the dimming part 21 is avoided, and the production efficiency of the optical regulation film 2 is improved; on the other hand, because body 22 and the portion 21 of adjusting luminance are the structure of integrative hot plastic forming, avoid body 22 and the junction of the portion 21 of adjusting luminance to form the gap, lead to light to refract and scatter repeatedly in the gap, avoid the energy loss of light, also can reduce the heat absorption rate of optics regulation and control membrane 2, improve backlight unit's stability.
Optionally, the optical modulation film 2 comprises at least two membrane sheets 24, each membrane sheet 24 being provided with a wedge-shaped edge 23 at its periphery. At least two pieces of membrane 24 are formed into the body 22 by hot pressing, and the wedge-shaped edge 23 on the peripheral side of at least two pieces of membrane 24 is formed into the light adjusting part 21 by hot pressing.
Since both sides of the light adjusting portion 21 may be a specific structure provided with a curved surface, it is difficult to form the light adjusting portion 21 provided with the curved surface at both sides by one-time thermoplastic molding. In this embodiment, the at least two membranes 24 and the wedge-shaped edge 23 structure extending from the periphery of the membranes 24 are formed by first thermoplastic molding, and then the at least two membranes 24 are hot-pressed to form the body 22 through the second hot pressing, and the wedge-shaped edge 23 on the peripheral side of the at least two membranes 24 is hot-pressed to form the light modulation part 21, so that the difficulty of processing the optical modulation film 2 is reduced, and the yield of the optical modulation film 2 is improved.
In an embodiment of the present invention, a hot melt adhesive may also be added between two adjacent membranes 24 and/or wedge edges 23 during the secondary hot pressing to enhance the bonding strength.
The utility model discloses still provide a display module assembly, this display module assembly include liquid crystal glazing and backlight unit, and this backlight unit's concrete structure refers to above-mentioned embodiment, because this display module assembly has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here. The liquid crystal glass is arranged on one side, back to the backlight carrier plate 1, of the optical regulation and control film 2.
The utility model also provides a display device, which comprises the display module, wherein the display module comprises the backlight module; or, the display device comprises the backlight module. The specific structure of the backlight module refers to the above embodiments, and since the display module adopts all the technical solutions of all the above embodiments, all the beneficial effects brought by the technical solutions of the above embodiments are at least achieved, and are not repeated herein.
It will be appreciated that the display means may be a device comprising a micro control unit, a wireless transceiver antenna and/or a wired data transmission interface. In an embodiment of the present invention, the display device may be a 30-to 36-inch lcd or other display devices.
The above is only the optional embodiment of the present invention, and not therefore the scope of the present invention is limited, all under the inventive concept, the equivalent structure transformation made by the contents of the specification and the drawings is utilized, or the direct/indirect application is included in other related technical fields in the patent protection scope of the present invention.
Claims (10)
1. A backlight module is characterized in that the backlight module comprises:
the backlight device comprises a backlight carrier plate, a light source and a light source, wherein the backlight carrier plate is provided with a plurality of light sources; and
the backlight carrier plate comprises a light source, an optical regulation and control film, wherein the optical regulation and control film is positioned on one side of the backlight carrier plate, wherein the light source is arranged on the side of the backlight carrier plate, the optical regulation and control film comprises a body and a dimming part arranged in the peripheral extending direction of the body, and the cross section thickness of the dimming part is gradually reduced from the joint of the dimming part and the body.
2. The backlight module according to claim 1, wherein a surface of the light adjusting part facing the backlight carrier is formed with a curved surface;
and/or an arc surface is formed on the surface of the light adjusting part back to the backlight carrier plate.
3. The backlight module according to claim 1, wherein in a cross section of the optical modulation film, a central axis defining a cross section of the light modulation part is taken as an extension line L, a connection point of the light modulation part and the body is P, an end point of the light modulation part is J, and an included angle formed between the extension line L and an intersection line JP is defined as θ, 0 ° < θ < 90 °.
4. The backlight module according to claim 3, wherein a vertical distance from an end of the light modulation part away from the main body to the main body is defined as W;
and defining the shortest vertical distance from the light source to the edge of the backlight carrier plate as D, wherein D is less than or equal to W.
5. The backlight module as claimed in claim 4, wherein the distance between the body and the backlight carrier is defined as H, H is greater than or equal to 8mm and less than or equal to 15 mm.
6. The backlight module according to claim 4, wherein the main body and the light adjusting part are integrally formed by thermal molding.
7. The backlight module of claim 1, wherein the optical modulation film comprises at least two films, each film having a tapered edge at a periphery thereof;
at least two the diaphragm hot pressing form the body, at least two the wedge limit hot pressing of diaphragm week side forms light modulation portion.
8. The backlight module according to any one of claims 1 to 7, wherein the optical control film is an acrylic material.
9. A display module, comprising a liquid crystal glass and the backlight module of any one of claims 1 to 8, wherein the liquid crystal glass is disposed on a side of the optical modulation film facing away from the backlight carrier.
10. A display device, comprising the display module of claim 9;
alternatively, the display device comprises a backlight module according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920867683.9U CN209911719U (en) | 2019-06-10 | 2019-06-10 | Backlight module, display module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920867683.9U CN209911719U (en) | 2019-06-10 | 2019-06-10 | Backlight module, display module and display device |
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| Publication Number | Publication Date |
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| CN209911719U true CN209911719U (en) | 2020-01-07 |
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| CN201920867683.9U Active CN209911719U (en) | 2019-06-10 | 2019-06-10 | Backlight module, display module and display device |
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