CN113448008A - Composite light guide plate structure and backlight module - Google Patents
Composite light guide plate structure and backlight module Download PDFInfo
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- CN113448008A CN113448008A CN202110860683.8A CN202110860683A CN113448008A CN 113448008 A CN113448008 A CN 113448008A CN 202110860683 A CN202110860683 A CN 202110860683A CN 113448008 A CN113448008 A CN 113448008A
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- Prior art keywords
- light guide
- guide plate
- adhesive layer
- film
- layer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0051—Diffusing sheet or layer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
Abstract
The invention relates to the field of light guide plates. The invention discloses a composite light guide plate structure and a backlight module, wherein the composite light guide plate structure comprises a reflecting layer, a first adhesive layer, a light guide plate, a second adhesive layer and an optical film layer which are sequentially arranged from bottom to top, wherein a dot surface of the light guide plate is arranged downwards, a light emitting surface is arranged upwards, the first adhesive layer and the second adhesive layer are both of frame structures, the first adhesive layer is arranged between the edge of the upper surface of the reflecting layer and the edge of the dot surface of the light guide plate to fixedly bond the reflecting layer and the light guide plate together, and the second adhesive layer is arranged between the edge of the light emitting surface of the light guide plate and the edge of the lower surface of the optical film layer to fixedly bond the optical film layer and the light guide plate together. The invention realizes that the reflecting layer, the light guide plate and the optical film layer are fixed into an integrated structure without influencing the optical performance, reduces the process flow for a whole factory, improves the assembly efficiency, saves the labor cost and reduces the assembly reject ratio; and the protection effect on the light guide plate is better.
Description
Technical Field
The invention belongs to the field of light guide plates, and particularly relates to a composite light guide plate structure and a backlight module.
Background
With the increasing popularization of liquid crystal products, users are more and more critical to the products, higher and higher requirements are put on the quality of the products, and the users want the products to be light, thin, large in screen, and the cost (or the cost is reduced) and the products to be light, thin, large in screen, large in structure and performance cannot be reduced. The overall structure design among the present backlight unit has been difficult to deal with increasingly harsh user's demand, in prior art, backlight unit's equipment flow is in the complete machine factory, the backplate with the separation, the reflecting layer, the light guide plate, the membrane of adding lustre to, the diffusion barrier covers gluey frame formation backlight unit after stacking together in proper order again, it is all very inconvenient with the installation to adopt many diaphragms of this kind to add light guide plate framework to make and install, tedious process, cause dirty easily, the cost is higher, if can leave the factory at the light guide plate just with light guide plate and reflecting layer, the membrane of adding lustre to, fixed connection such as diffusion barrier forms a whole, then can solve above-mentioned problem well. However, if the reflecting layer, the light guide plate, the brightness enhancement film and the diffusion film are sequentially adhered and fixed by using the whole adhesive layer, the light guide plate has a light blocking phenomenon that light is concentrated on the light incident side due to the problem of the refractive index of the adhesive layer, and cannot meet the requirement, so that a composite light guide plate for fixing the reflecting layer, the light guide plate, the brightness enhancement film, the diffusion film and the like together is not available on the market at present.
Disclosure of Invention
The present invention is directed to a composite light guide plate structure and a backlight module for solving the above-mentioned problems.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a composite light guide plate structure, include the reflection stratum that from the bottom up set gradually, first glue film, the light guide plate, second glue film and optics rete, the dot face of light guide plate sets up downwards, the light-emitting face sets up upwards, first glue film and second glue film are frame type structure, first glue film sets up between the edge of reflection stratum upper surface and the dot face of light guide plate and with reflection stratum and light guide plate fixed bonding together, the second glue film sets up between the edge of the play plain noodles of light guide plate and the edge of optics rete lower surface and with optics rete and light guide plate fixed bonding together.
Furthermore, the thickness of the first adhesive layer is less than or equal to 0.05mm, and the thickness of the second adhesive layer is less than or equal to 0.05 mm.
Furthermore, the width of the frame edge of the first adhesive layer is less than or equal to 1.2mm, and the width of the frame edge of the second adhesive layer is less than or equal to 1.2 mm.
Further, the first adhesive layer and the second adhesive layer are double-sided adhesive, UV adhesive or hot melt adhesive.
Furthermore, the color of the first glue layer and the second glue layer is black.
Further, the optical film layer is a composite film layer.
Furthermore, all the film layers of the composite film layer are sequentially adhered and fixed through the frame-shaped adhesive layer.
Further, compound rete includes first brightness enhancement film, third glue film, second brightness enhancement film, fourth glue film and diffusion barrier, and third glue film and fourth glue film are frame type structure, and the third glue film sets up between the edge of first brightness enhancement film upper surface and the edge of second brightness enhancement film lower surface and fixedly bonds first brightness enhancement film and second brightness enhancement film together, and the fourth glue film sets up between the edge of second brightness enhancement film upper surface and the edge of diffusion barrier lower surface and fixedly bonds second brightness enhancement film and diffusion barrier together.
Furthermore, the thickness of the third adhesive layer and the thickness of the fourth adhesive layer are both less than or equal to 0.05mm, and the width of the frame edge of the third adhesive layer and the width of the frame edge of the fourth adhesive layer are both less than or equal to 1.2 mm.
The invention also provides a backlight module which comprises the composite light guide plate structure.
The invention has the beneficial technical effects that:
the invention realizes that the reflecting layer, the light guide plate and the optical film layer are fixed into an integrated structure without influencing the optical performance, and the whole machine factory can directly install the light guide plate without assembling the reflecting layer, the light guide plate and the optical film layer again, thereby reducing the process flow for the whole machine factory, improving the assembly efficiency, saving the labor cost and reducing the assembly reject ratio; and because the upper and lower surfaces of the light guide plate are respectively protected by the optical film layer and the reflecting layer, the light guide plate does not need to be covered by a protective film for protection, and the scratching defects of the light guide plate are reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a block diagram of a first embodiment of the present invention;
FIG. 2 is a schematic diagram of another embodiment of the present invention;
FIG. 3 is a cross-sectional view of a first embodiment of the present invention;
FIG. 4 is an exploded view of a first embodiment of the present invention;
FIG. 5 is a diagram of a conventional composite film;
FIG. 6 is a structural view of a second embodiment of the present invention;
FIG. 7 is a cross-sectional view of a second embodiment of the present invention;
fig. 8 is an exploded view of a second embodiment of the present invention.
Detailed Description
To further illustrate the various embodiments, the invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
The invention will now be further described with reference to the accompanying drawings and detailed description.
Example one
As shown in fig. 1-4, a composite light guide plate structure includes a reflective layer 1, a first adhesive layer 2, a light guide plate 3, a second adhesive layer 4 and an optical film layer 5, which are sequentially disposed from bottom to top (using fig. 1 as a direction reference), wherein a dot surface of the light guide plate 3 is disposed downward, a light emitting surface is disposed upward, and a light incident surface of the light guide plate 3 is disposed at a side surface. In this embodiment, the light guide plate 3 has a rectangular structure, but is not limited thereto, and in some embodiments, the shape of the light guide plate 3 may be set according to actual needs.
The light guide plate 3 may be formed by various conventional light guide plate structures, such as a flat plate, a wedge plate, etc., by injection molding, cutting molding, etc., and may be made of acrylic sheet, PC (polycarbonate) sheet, etc.
The first adhesive layer 2 and the second adhesive layer 4 are both frame-shaped structures, and accordingly, in this embodiment, the first adhesive layer 2 and the second adhesive layer 4 are rectangular frame-shaped structures. The first adhesive layer 2 and the second adhesive layer 4 are preferably of a closed continuous frame structure, so that the sealing performance and the bonding force are improved, and the process is simple, but not limited to.
In this embodiment, the first adhesive layer 2 and the second adhesive layer 4 may be double-sided adhesive, UV adhesive, hot melt adhesive, or the like.
The first glue layer 2 is arranged between the edge of the upper surface of the reflection layer 1 and the edge of the mesh point surface of the light guide plate 3 to fixedly bond the reflection layer 1 and the light guide plate 3 together, and because the first glue layer 2 is of a frame structure, the middle parts of the reflection layer 1 and the light guide plate 3 are not provided with glue layers, the optical performance cannot be influenced due to the refractive index problem of the glue layers.
The second glue film 4 is arranged between the edge of the light-emitting surface of the light guide plate 3 and the edge of the lower surface of the optical film 5 to fixedly bond the optical film 5 and the light guide plate 3 together, and the second glue film 4 is of a frame structure, so that the glue films are not arranged in the middle parts of the optical film 5 and the light guide plate 3, and the optical performance cannot be influenced by the refractive index problem of the glue films.
Preferably, in this embodiment, the thickness of the first adhesive layer 2 is less than or equal to 0.05mm, and the thickness of the second adhesive layer 4 is less than or equal to 0.05mm, so as to ensure the adhesive property and not cause too large thickness, but not limited thereto, and in some embodiments, other thicknesses of the first adhesive layer 2 and the second adhesive layer 4 may also be used.
Preferably, in this embodiment, the width d1 of the frame edge of the first glue layer 2 is not less than 1.2mm, and the width d2 of the frame edge of the second glue layer 4 is not less than 1.2mm, which not only ensures the adhesive property, but also does not cause the width of the frame edge of the glue layer to be too large to exceed the range of the glue frame, thereby causing a black edge, but not limited thereto.
Preferably, in this embodiment, the color of the first adhesive layer 2 and the second adhesive layer 4 is black. The light will not penetrate the glue layer and reach the surface of the optical film layer 5 to cause the bad phenomena of bright edge, etc., and the black edge printing on the upper surface of the optical film layer 5 can be saved, the process is reduced, and the cost is reduced, but not limited thereto.
The reflective layer 1 may be any of various existing reflective layers, such as a reflective layer formed by plating a metal reflective film on a PET substrate, and the like, and reference may be made to the prior art, which is not described in detail.
The optical film layer 5 may be a single-layer film or a composite film layer, preferably, in order to improve the brightness and uniformity of emitted light, the optical film layer 5 may be a composite film layer, fig. 5 shows a conventional composite film layer with a better brightness enhancement effect, and the composite film layer includes a first brightness enhancement film 100, a second brightness enhancement film 200 and a diffusion film 300, the first brightness enhancement film 100 and the second brightness enhancement film 200 are respectively provided with a first micro-prism structure 101 and a second micro-prism structure 201, the peaks of the first micro-prism structure 101 and the second micro-prism structure 201 are arranged in a staggered manner, the first brightness enhancement film 100 is bonded and fixed with the second brightness enhancement film 200 through the high peak of the first micro-prism structure 101, the second brightness enhancement film 200 is bonded and fixed with the diffusion film 300 through the high peak of the second micro-prism structure 201, and the specific structure is shown in fig. 5, but is not limited thereto.
Example two
As shown in fig. 6 to 8, the difference between the present embodiment and the first embodiment is: the optical film layer 5 of the embodiment is a composite film layer, each film layer of the composite film layer is fixedly bonded through the adhesive layer of the frame shape, the adhesive layers are respectively arranged between the edges of the film layers, and the composite film layer is adopted to improve the brightening effect, is easy to realize and is low in cost.
Specifically, in this embodiment, the composite film layer 5 includes a first brightness enhancement film 51, a third adhesive layer 52, a second brightness enhancement film 53, a fourth adhesive layer 54 and a diffusion layer 55, where the third adhesive layer 52 and the fourth adhesive layer 54 are both rectangular frame structures, the second adhesive layer 4 is disposed between an edge of a light exit surface of the light guide plate 3 and an edge of a lower surface of the first brightness enhancement film 51 to fixedly bond the first brightness enhancement film 51 and the light guide plate 3 together, the third adhesive layer is disposed between an edge of an upper surface of the first brightness enhancement film 51 and an edge of a lower surface of the second brightness enhancement film 53 to fixedly bond the first brightness enhancement film 51 and the second brightness enhancement film 53 together, and the fourth adhesive layer 54 is disposed between an edge of an upper surface of the second brightness enhancement film 53 and an edge of a lower surface of the diffusion film 55 to fixedly bond the second brightness enhancement film 53 and the diffusion layer 55 together. Compared with the composite film layer shown in the figure 5, the composite film layer 5 has the advantages of better brightening effect, simpler structure, easy realization and low cost.
Preferably, in this embodiment, the thickness of the third adhesive layer 52 is less than or equal to 0.05mm, and the thickness of the fourth adhesive layer 54 is less than or equal to 0.05mm, so as to ensure the adhesion performance and not cause too large thickness, but not limited thereto, and in some embodiments, other thicknesses of the third adhesive layer 52 and the fourth adhesive layer 54 may be used.
Preferably, in the present embodiment, the width d3 of the frame edge of the third adhesive layer 52 is less than or equal to 1.2mm, and the width d4 of the frame edge of the fourth adhesive layer 54 is less than or equal to 1.2mm, which not only ensures the adhesive property, but also does not cause the width of the frame edge of the adhesive layer to be too large to exceed the range of the adhesive frame, thereby causing a black edge, but not limited thereto.
Preferably, in this embodiment, the third adhesive layer 52 and the fourth adhesive layer 54 are black. The light will not penetrate the glue layer and reach the surface of the optical film layer 5 to cause the bad phenomena of bright edge, etc., and the black edge printing on the upper surface of the optical film layer 5 can be saved, the process is reduced, and the cost is reduced, but not limited thereto.
Of course, in some embodiments, the number of film layers of the composite film layer may also be less than 3 or more than 3.
The invention also provides a backlight module which comprises the composite light guide plate structure.
The invention realizes that the reflecting layer 1, the light guide plate 3 and the optical film layer 5 are fixed into an integrated structure without influencing the optical performance, and the whole factory can directly install the light guide plate without assembling the reflecting layer, the light guide plate and the optical film layer again, thereby reducing the process flow for the whole factory, improving the assembly efficiency, saving the labor cost and reducing the assembly reject ratio; and because the upper and lower surfaces of the light guide plate have optical film layer and reflecting layer separately, do not need to cover the protective film to protect again, reduce the scratching badly of the light guide plate.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a composite light guide plate structure which characterized in that: including the reflection stratum that from the bottom up set gradually, first glue film, the light guide plate, second glue film and optics rete, the dot face of light guide plate sets up downwards, the light-emitting face sets up upwards, first glue film and second glue film are frame type structure, first glue film sets up between the edge of reflection stratum upper surface and the dot face of light guide plate and with reflection stratum and light guide plate fixed bonding together, the second glue film sets up between the edge of the play plain noodles of light guide plate and the edge of optics rete lower surface and with optics rete and light guide plate fixed bonding together.
2. The composite light guide plate structure of claim 1, wherein: the thickness of the first adhesive layer is less than or equal to 0.05mm, and the thickness of the second adhesive layer is less than or equal to 0.05 mm.
3. The composite light guide plate structure of claim 1, wherein: the width of the frame edge of the first adhesive layer is less than or equal to 1.2mm, and the width of the frame edge of the second adhesive layer is less than or equal to 1.2 mm.
4. The composite light guide plate structure of claim 1, wherein: the first adhesive layer and the second adhesive layer are double-sided adhesive, UV adhesive or hot melt adhesive.
5. The composite light guide plate structure of claim 1, wherein: the color of the first glue layer and the second glue layer is black.
6. The composite light guide plate structure of claim 1, wherein: the optical film layer is a composite film layer.
7. The composite light guide plate structure of claim 6, wherein: and all the film layers of the composite film layer are sequentially bonded and fixed through the frame-shaped adhesive layer.
8. The composite light guide plate structure of claim 7, wherein: the composite film layer comprises a first brightness enhancement film, a third adhesive layer, a second brightness enhancement film, a fourth adhesive layer and a diffusion film, wherein the third adhesive layer and the fourth adhesive layer are of frame structures, the third adhesive layer is arranged between the edge of the upper surface of the first brightness enhancement film and the edge of the lower surface of the second brightness enhancement film and fixedly bonds the first brightness enhancement film and the second brightness enhancement film together, and the fourth adhesive layer is arranged between the edge of the upper surface of the second brightness enhancement film and the edge of the lower surface of the diffusion film and fixedly bonds the second brightness enhancement film and the diffusion film together.
9. The composite light guide plate structure of claim 8, wherein: the thickness of the third adhesive layer and the thickness of the fourth adhesive layer are both less than or equal to 0.05mm, and the width of the frame edge of the third adhesive layer and the width of the frame edge of the fourth adhesive layer are both less than or equal to 1.2 mm.
10. A backlight module is characterized in that: comprising the composite light guide plate structure of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110860683.8A CN113448008A (en) | 2021-07-29 | 2021-07-29 | Composite light guide plate structure and backlight module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110860683.8A CN113448008A (en) | 2021-07-29 | 2021-07-29 | Composite light guide plate structure and backlight module |
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| Publication Number | Publication Date |
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| CN113448008A true CN113448008A (en) | 2021-09-28 |
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| CN202110860683.8A Pending CN113448008A (en) | 2021-07-29 | 2021-07-29 | Composite light guide plate structure and backlight module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024061891A1 (en) * | 2022-09-20 | 2024-03-28 | Behr-Hella Thermocontrol Gmbh | Display device with an ir camera for a vehicle |
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2021
- 2021-07-29 CN CN202110860683.8A patent/CN113448008A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024061891A1 (en) * | 2022-09-20 | 2024-03-28 | Behr-Hella Thermocontrol Gmbh | Display device with an ir camera for a vehicle |
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