CN107203070B - Composite film, manufacturing method thereof, backlight source and display device - Google Patents
Composite film, manufacturing method thereof, backlight source and display device Download PDFInfo
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- CN107203070B CN107203070B CN201710589300.1A CN201710589300A CN107203070B CN 107203070 B CN107203070 B CN 107203070B CN 201710589300 A CN201710589300 A CN 201710589300A CN 107203070 B CN107203070 B CN 107203070B
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- 239000002131 composite material Substances 0.000 title claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 230000017525 heat dissipation Effects 0.000 claims abstract description 57
- 239000012528 membrane Substances 0.000 claims abstract description 21
- 239000010408 film Substances 0.000 claims description 74
- 239000000463 material Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 11
- 229920000642 polymer Polymers 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical group CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 9
- 238000001723 curing Methods 0.000 claims description 9
- 239000011159 matrix material Substances 0.000 claims description 9
- 239000003960 organic solvent Substances 0.000 claims description 9
- 239000012788 optical film Substances 0.000 claims description 8
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 7
- 239000004020 conductor Substances 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 239000004925 Acrylic resin Substances 0.000 claims description 3
- 229920000178 Acrylic resin Polymers 0.000 claims description 3
- 229910052810 boron oxide Inorganic materials 0.000 claims description 3
- 239000002041 carbon nanotube Substances 0.000 claims description 3
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 3
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims description 3
- 238000011415 microwave curing Methods 0.000 claims description 3
- 238000003892 spreading Methods 0.000 claims description 2
- 238000001029 thermal curing Methods 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims 2
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 206010040954 Skin wrinkling Diseases 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 3
- 239000004926 polymethyl methacrylate Substances 0.000 description 3
- 230000037303 wrinkles Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 238000003847 radiation curing Methods 0.000 description 2
- 238000007761 roller coating Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000010076 replication Effects 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/16—Drying; Softening; Cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/302—Conductive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/416—Reflective
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133628—Illuminating devices with cooling means
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a composite film, a manufacturing method thereof, a backlight source and display equipment. A composite membrane, comprising: a membrane body; and the heat dissipation layer is arranged on the surface of the film body and comprises a concave-convex structure. According to the composite film provided by the invention, the heat dissipation layer is arranged on the film body and comprises the concave-convex structure, heat on the film body is transferred outwards through the concave-convex structure, the concave-convex structure realizes that the heat is quickly dissipated along the thickness direction of the heat dissipation layer, the transmission distance of the heat on the heat dissipation layer is effectively shortened, and the purpose of improving the heat dissipation efficiency of the film body is realized.
Description
Technical Field
The present invention relates to, but not limited to, liquid crystal display technologies, and in particular, to a composite film, a method for manufacturing the composite film, a backlight, and a display device.
Background
Along with the requirement for the screen definition increases, more and more pixel points are required, so that a larger area is required for arranging the driving circuit, the extinction area is increased, the overall light transmittance of the module is reduced, and in order to ensure that the overall brightness of the module cannot be reduced, most researchers in the industry improve the brightness of the backlight source to solve the problem. The most radical and rapid mode for improving the brightness of the backlight source is to improve the brightness of the light source LED, however, the light-emitting part of the adjacent LED is mostly a high-molecular polymethyl methacrylate (PET) matrix film material with excellent light guide performance and poor heat conduction performance, as shown in FIG. 1, the heat emitted after the light source is lighted is continuously increased along with the accumulation of time, when the heat exceeds the glass transition temperature (Tg) point of the polymethyl methacrylate, the risk of wrinkling of the film material is rapidly increased, and the reflection film at the light source is often in an 8-shaped wrinkle shape. The conventional backlight design generally realizes heat dissipation by means of a lamp strip with a graphite sheet, a reflection film with a half-equipped graphite sheet on the back side, a reflection film with a full-equipped graphite sheet on the back side, and the like. However, the graphite sheet has a limitation in mass production because it is expensive and the edges are easily broken and fall off when cut.
Disclosure of Invention
In order to solve the technical problems, the invention discloses a composite film which is simple in manufacturing process, low in manufacturing cost and fast in heat dissipation of a film body, and can be better applied to mass production.
In order to achieve the object of the present invention, the present invention provides a composite film comprising: a membrane body; and the heat dissipation layer is arranged on the surface of the film body and comprises a concave-convex structure.
Optionally, the heat dissipation layer comprises a polymer matrix and a thermally conductive material.
Optionally, the heat conducting material is cross-linked in the concave-convex structure to form a heat conducting channel, and the heat conducting channel is inclined to the membrane body or perpendicular to the plane of the membrane body.
Optionally, the heat spreading layer further comprises ink.
Optionally, the polymer matrix is acrylic resin, and the heat conducting material is lamellar graphene, carbon nanotubes or lamellar boron oxide.
The invention also provides a backlight source, which comprises a rubber frame, a light source, a light guide plate, an optical film layer and the composite film of any embodiment, wherein the light source is positioned on one side of the light guide plate, the optical film layer is positioned on the light emergent side of the light guide plate, the composite film is positioned on the side, opposite to the light emergent side, of the light guide plate, the film body of the composite film is a reflecting film, and the heat dissipation layer of the composite film is positioned on the side surface, far away from the light guide plate, of the reflecting film.
The invention also provides a display device which comprises the backlight source.
The invention also provides a manufacturing method of the composite film, which comprises the following steps: roller coating a solution for manufacturing a heat dissipation layer on the surface of the film body, wherein the solution for manufacturing the heat dissipation layer comprises an organic solvent, a polymer matrix and a heat conduction material; baking to volatilize the organic solvent in the solution and pre-crosslink the heat conduction material to form a heat conduction channel; horizontally orienting the heat conducting channel by a laminating device; the concave-convex structure is formed by carving and orienting the heat conduction channel through the mold, so that the orientation of the heat conduction channel is changed from a horizontal state to a vertical state or an inclined state; curing and molding to prepare the heat dissipation layer on the film body.
Optionally, the organic solvent is ethanol, butanone, or toluene.
Optionally, the curing molding is performed by ultraviolet curing, thermosetting, radiation curing or microwave curing, the cross section of the mold comprises a triangular or rectangular concave-convex structure, and the back surface of the film body is coated with a solution for manufacturing a heat dissipation layer in a roller manner.
Compared with the prior art, the heat dissipation layer of the composite membrane provided by the invention is arranged on the membrane body and comprises the concave-convex structure, heat on the membrane body is transferred outwards through the concave-convex structure, the concave-convex structure realizes that the heat is quickly dissipated along the thickness direction of the heat dissipation layer, the transmission distance of the heat on the heat dissipation layer is effectively shortened, and the purpose of improving the heat dissipation efficiency of the membrane body is realized.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a partial schematic view of a cross-sectional structure of a backlight according to the related art;
FIG. 2 is a partial schematic view of a cross-sectional structure of a backlight according to an embodiment of the invention;
FIG. 3 is a schematic structural view of the composite membrane of FIG. 2;
FIG. 4 is a schematic structural diagram of a composite membrane according to another embodiment of the present invention;
fig. 5 is a flow chart of a method for making a composite film according to an embodiment of the invention.
Reference numerals
The light guide plate comprises a 100 reflection film, a 300 glue frame, a 400 light source, a 500 light guide plate, a 600 optical film layer, a 1 film body, a 2 heat dissipation layer, a 21 concave-convex structure, a 22 heat conduction channel, a 3 glue frame, a 4 light source, a 5 light guide plate and a 6 optical film layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
A composite film, a method of making a composite film, a backlight, and a display device of some embodiments of the invention are described below with reference to the drawings.
As shown in fig. 3 and 4, the composite film according to the present invention includes: a membrane body 1; and a heat dissipation layer 2 disposed on the surface of the film body 1, the heat dissipation layer 2 including a concave-convex structure 21.
According to the composite film provided by the invention, the heat dissipation layer 2 is arranged on the film body 1, the heat dissipation layer 2 comprises the concave-convex structure 21, heat on the film body 1 is transferred outwards through the concave-convex structure 21, the concave-convex structure 21 realizes that the heat is quickly dissipated along the thickness direction of the heat dissipation layer 2, the transmission distance of the heat on the heat dissipation layer 2 is effectively shortened, and the purpose of improving the heat dissipation efficiency of the film body 1 is realized.
The heat dissipation layer 2 comprises a polymer base body and a heat conduction material, the polymer base body is connected with the film body 1, the heat conduction material is located in the polymer base body and forms a concave-convex structure 21 on the heat dissipation layer 2 through a prism microstructure copying process, so that the heat conduction material dissipates heat along the thickness direction of the heat dissipation layer 2 instead of along the length direction or the width direction of the heat dissipation layer 2, the heat dissipation path of the heat dissipation layer 2 is effectively shortened, and heat on the film body 1 is dissipated rapidly through the heat dissipation layer 2.
Specifically, the heat conducting material is crosslinked in the concave-convex structure 21 to form a heat conducting channel 22, the heat conducting channel 22 is inclined to the membrane body 1 or perpendicular to the plane of the membrane body 1, one end of the heat radiating channel, which is close to the membrane body 1, is in contact with the surface of the membrane body 1, the other end of the heat radiating channel is located on the surface of the concave-convex structure 21, and heat on the membrane body 1 is transferred along the heat radiating channel and is rapidly dissipated.
In addition, heat dissipation layer 2 still includes printing ink, and printing ink can shelter from light, blocks that light passes heat dissipation layer 2, can promote display device's display performance when the complex film is applied to display device.
Specifically, the polymer matrix is made of acrylic resin, and the heat conductive material is made of graphene sheets, carbon nanotubes or boron oxide sheets, which all can achieve the purpose of the present application.
Specifically, as shown in fig. 3, the concave-convex structure is a saw-tooth structure with a triangular cross section; or as shown in fig. 4, the concave-convex structure is a great wall structure with a rectangular cross section.
As shown in fig. 2, the backlight provided by the present invention includes a rubber frame 3, a light source 4, a light guide plate 5, an optical film layer 6 and the composite film described in any of the above embodiments, where the light source 4 is located on one side of the light guide plate 5, the optical film layer 6 is located on a light exit side of the light guide plate 5, the composite film is located on a side of the light guide plate 5 opposite to the light exit side, the film body 1 of the composite film is a reflective film, and the heat dissipation layer 2 of the composite film is located on a side surface of the reflective film, which is far from the light guide plate 5.
According to the backlight source provided by the invention, the heat generated by the light source 4 is transferred to the reflecting film, then transferred to the heat dissipation layer 2 from the reflecting film and quickly dissipated along the thickness direction of the heat dissipation layer 2, so that the heat of the backlight source is quickly dissipated, and the problems of wrinkle deformation and the like at the light source 4 are avoided.
The temperature at the light source 4 can be reduced from 55 degrees to about 38 degrees relative to the prior art, and the area 410mm from the light source can be reduced from 50 degrees to about 38 degrees relative to the prior art. And the concave-convex structure 21 on the heat dissipation layer 2 can increase the structural strength of the reflective film and avoid the reflective film from generating 8-shaped wrinkle deformation. And the cutting of the heat dissipation layer 2 is not needed, and the process is simpler.
The display device (not shown in the figure) provided by the invention comprises the backlight source described in the above embodiment.
The display device provided by the present invention has all the advantages of the backlight source provided by the above embodiments, and therefore, the description thereof is omitted, and all of the advantages of the display device provided by the present invention should fall within the protection scope of the present application.
As shown in fig. 5, the method for manufacturing a composite film according to the present invention includes:
step 102: roller coating a solution for manufacturing a heat dissipation layer on the surface of the film body, wherein the solution for manufacturing the heat dissipation layer comprises an organic solvent, a polymer matrix and a heat conduction material;
step 104: baking by using an oven to volatilize the organic solvent in the solution and pre-crosslink the heat conduction material to form a heat conduction channel;
step 106: horizontally orienting the heat conducting channel by a laminating device;
step 108: the concave-convex structure is formed by carving and orienting the heat conduction channel through the mold, so that the orientation of the heat conduction channel is changed from a horizontal state to a vertical state or an inclined state;
step 110: curing and molding to prepare the heat dissipation layer on the film body.
The manufacturing method of the composite film provided by the invention has the advantages that the process is simple, the mass production is convenient, the manufactured heat dissipation layer does not need subsequent cutting and other processes, and the practicability is obvious.
The heat conduction channel is carved and oriented by the mould to form a concave-convex structure, namely: by adopting the prism microstructure replication process, the heat conduction channel is changed from a horizontal state to an inclined state or a vertical state, the propagation path of the heat conduction channel is shortened, and the heat can be transferred and dissipated quickly.
The organic solvent is ethanol, butanone or toluene, the curing molding is ultraviolet curing, thermocuring, radiation curing or microwave curing, the cross section of the mold comprises a triangular sawtooth structure (see fig. 3) or a rectangular great wall structure (see fig. 4) and the like, the back surface of the film body is coated with a solution for manufacturing a heat dissipation layer in a roller mode, and the film body is a reflection film.
In summary, in the composite film provided by the invention, the heat dissipation layer is disposed on the film body, and the heat dissipation layer includes the concave-convex structure, the heat on the film body is transferred outwards through the concave-convex structure, the concave-convex structure realizes that the heat is quickly dissipated along the thickness direction of the heat dissipation layer, the transmission distance of the heat on the heat dissipation layer is effectively shortened, and the purpose of improving the heat dissipation efficiency of the film body is achieved.
In the description of the present invention, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. The backlight source is characterized by comprising a rubber frame, a light source, a light guide plate, an optical film layer and a composite film, wherein the light source is positioned on one side of the light guide plate, the optical film layer is positioned on the light emergent side of the light guide plate, and the composite film is positioned on the side, opposite to the light emergent side, of the light guide plate;
the composite membrane includes:
a membrane body; and
the heat dissipation layer is arranged on the surface of the film body and comprises a concave-convex structure;
the film body of the composite film is a reflecting film, and the heat dissipation layer of the composite film is positioned on the side surface of one side of the reflecting film, which is far away from the light guide plate;
the heat dissipation layer comprises a polymer matrix and a heat conduction material;
the heat conduction material is crosslinked in the concave-convex structure to form a heat conduction channel, and the heat conduction channel is inclined to the membrane body or vertical to the plane of the membrane body.
2. The backlight of claim 1, wherein the heat spreading layer further comprises ink.
3. The backlight of claim 1, wherein the polymer matrix is an acrylic resin and the thermally conductive material is lamellar graphene, carbon nanotubes, or lamellar boron oxide.
4. A display device comprising a backlight as claimed in any one of claims 1 to 3.
5. A method of making a composite film, comprising:
the method comprises the following steps of (1) rolling a solution for manufacturing a heat dissipation layer on the surface of a film body in a rolling mode, wherein the solution for manufacturing the heat dissipation layer comprises an organic solvent, a polymer matrix and a heat conduction material, and the film body is a reflection film;
baking to volatilize the organic solvent in the solution and pre-crosslink the heat conduction material to form a heat conduction channel;
horizontally orienting the heat conducting channel by a laminating device;
the concave-convex structure is formed by carving and orienting the heat conduction channel through the mold, so that the orientation of the heat conduction channel is changed from a horizontal state to a vertical state or an inclined state;
curing and molding to prepare the heat dissipation layer on the film body.
6. The method of claim 5, wherein the organic solvent is ethanol, methyl ethyl ketone, or toluene.
7. The method for manufacturing the composite film according to claim 6, wherein the curing molding is performed by ultraviolet light curing, thermal curing or microwave curing, the cross section of the mold includes a triangular or rectangular concave-convex structure, and the back surface of the film body is coated with a solution for manufacturing a heat dissipation layer by roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710589300.1A CN107203070B (en) | 2017-07-19 | 2017-07-19 | Composite film, manufacturing method thereof, backlight source and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710589300.1A CN107203070B (en) | 2017-07-19 | 2017-07-19 | Composite film, manufacturing method thereof, backlight source and display device |
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| CN107203070A CN107203070A (en) | 2017-09-26 |
| CN107203070B true CN107203070B (en) | 2021-03-02 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109975900B (en) * | 2017-12-27 | 2021-07-06 | 宁波长阳科技股份有限公司 | Reflecting film with heat-conducting coating and preparation method and application thereof |
| CN109375420A (en) * | 2018-11-30 | 2019-02-22 | 武汉华星光电技术有限公司 | Backlight module |
| CN110164323A (en) * | 2019-05-23 | 2019-08-23 | 武汉华星光电半导体显示技术有限公司 | A kind of display screen and electronic device |
| CN111589675B (en) * | 2020-05-18 | 2022-02-08 | 横店集团东磁股份有限公司 | High-thermal-conductivity electromagnetic wave absorption composite sheet and preparation method thereof |
| CN114994967A (en) * | 2022-05-27 | 2022-09-02 | 武汉天马微电子有限公司 | Display module and display device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050074886A (en) * | 2004-01-14 | 2005-07-19 | 가부시키가이샤 야마모토 플라스틱고교 | Backlight unit for liquid crystal display device |
| CN1641436A (en) * | 2004-01-05 | 2005-07-20 | 鸿富锦精密工业（深圳）有限公司 | Straight-down backlight module |
| CN102235643A (en) * | 2010-04-22 | 2011-11-09 | 富士迈半导体精密工业（上海）有限公司 | Backlight module |
| CN205665500U (en) * | 2016-06-08 | 2016-10-26 | 信利半导体有限公司 | Backlight and liquid crystal display module |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101989583B (en) * | 2009-08-05 | 2013-04-24 | 清华大学 | Radiating structure and radiating system employing same |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1641436A (en) * | 2004-01-05 | 2005-07-20 | 鸿富锦精密工业（深圳）有限公司 | Straight-down backlight module |
| KR20050074886A (en) * | 2004-01-14 | 2005-07-19 | 가부시키가이샤 야마모토 플라스틱고교 | Backlight unit for liquid crystal display device |
| CN102235643A (en) * | 2010-04-22 | 2011-11-09 | 富士迈半导体精密工业（上海）有限公司 | Backlight module |
| CN205665500U (en) * | 2016-06-08 | 2016-10-26 | 信利半导体有限公司 | Backlight and liquid crystal display module |
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| CN107203070A (en) | 2017-09-26 |
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