CN115097668B - Backlight source diaphragm group preparation method, backlight module and display structure - Google Patents
Backlight source diaphragm group preparation method, backlight module and display structure Download PDFInfo
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- CN115097668B CN115097668B CN202210877186.3A CN202210877186A CN115097668B CN 115097668 B CN115097668 B CN 115097668B CN 202210877186 A CN202210877186 A CN 202210877186A CN 115097668 B CN115097668 B CN 115097668B
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- 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
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- 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
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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- 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
- G02F1/133602—Direct backlight
- G02F1/133608—Direct backlight including particular frames or supporting means
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- Mathematical Physics (AREA)
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- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The application relates to a preparation method of a backlight source diaphragm group, a backlight module and a display structure, which comprises the following steps: determining the gap between the liquid crystal adhesive tape and the diffusion sheet; determining the thickness of the brightness enhancement film; when the thickness is smaller than or equal to the gap, bending the convex free part of the brightness enhancement film to contact the liquid crystal adhesive tape in the gap; when the thickness is larger than the gap and the gap is larger than or equal to the thickness of the connecting piece, the brightness enhancement film is contacted with the liquid crystal adhesive tape in the gap through the connecting piece; when the thickness is larger than the gap and the gap is smaller than the thickness of the connecting piece, the brightness enhancement film is contacted with the liquid crystal adhesive tape through the connecting piece. The brightness enhancement film is fixed, so that the risk of deflection of the brightness enhancement film is reduced, the problem of blue edge display caused by deflection of the film is solved, and the increase of the manufacturing cost of products is avoided; the connecting piece is assembled in the product, so that the overall length and width of the product are not influenced; and the fixing mode does not lead to complete fixing of the membrane, thereby eliminating the risk of membrane wrinkling caused by loop measurement.
Description
Technical Field
The present application relates to the field of backlight display technologies, and in particular, to a method for manufacturing a backlight film set, a backlight module, and a display structure.
Background
The blue shift of Backlight (BLU) products during drop test is detected as a result of the shift of the brightness enhancement film (Brightness Enhancement Film, BEF) film. This was found in the study to be due to the fact that two lug slots are provided on both sides (chip & FH side) of the backlight product to limit the membrane, but only the liquid crystal adhesive tape (Cell tape) used in the lug position of the first side (chip side) in the product structure can directly contact the membrane. The adhesive tape at the lug position of the second side (FH side) is not in direct contact with the film, so that the film of the brightness enhancement film is in a Free state in the cavity, and the brightness enhancement film is deflected due to falling impact, so that the bad phenomenon of blue edge deflection occurs. As shown in fig. 1 and 2, the backlight product includes a backlight film set 100, wherein a first lug position 101 on a first side of the backlight film set can be directly contacted with the film, and a liquid crystal adhesive tape 110, a diffusion sheet 120, a brightness enhancement film 130 and a composite film layer 140 are sequentially stacked; referring to fig. 3, the liquid crystal adhesive tape 110 at the second lug position 102 on the second side is not in direct contact with the film of the brightness enhancement film 130, and a gap 150 exists between the liquid crystal adhesive tape 110 and the diffusion sheet 120, so that the film of the brightness enhancement film is in a free state in the cavity, and the reason of the gap is limited by the production equipment and the manufacturing process for protecting the product yield, which is difficult to eliminate.
In addition, if the membrane is completely tightly fixed, the subsequent loop test process is affected, and the membrane may be wrinkled.
Disclosure of Invention
Accordingly, it is necessary to provide a method for manufacturing a backlight film set, a backlight module and a display structure.
A preparation method of a backlight film group comprises the following steps:
determining the gap between the liquid crystal adhesive tape and the diffusion sheet;
determining the thickness of the brightness enhancement film;
when the thickness is smaller than or equal to the gap, bending the convex free part of the brightness enhancement film so as to contact the liquid crystal adhesive tape in the gap;
when the thickness is larger than the gap and the gap is larger than or equal to the thickness of the connecting piece, the brightness enhancement film is contacted with the liquid crystal adhesive tape in the gap through the connecting piece;
and when the thickness is larger than the gap and the gap is smaller than the thickness of the connecting piece, the brightness enhancement film is contacted with the liquid crystal adhesive tape through the connecting piece.
According to the preparation method of the backlight source diaphragm group, the brightness enhancement film is fixed on the premise of not changing the traditional production equipment and manufacturing process, so that the risk of deflection of the brightness enhancement film is reduced, the problem of blue edge display caused by deflection of the diaphragm is solved, and meanwhile, the manufacturing cost of a product is prevented from being increased; the connecting piece is assembled in the product, so that the overall length and width of the product are not influenced; in addition, the fixing mode does not enable the backlight source diaphragm group to be completely fixed, so that the risk of diaphragm wrinkling caused by ring measurement is eliminated.
In one embodiment, the protruding free portion of the brightness enhancement film is bent to form a U-shape.
In one embodiment, when the thickness is greater than the gap and the gap is greater than the thickness of the connecting piece, the protruding free portion of the brightness enhancement film is bent, and the brightness enhancement film is contacted with the liquid crystal adhesive tape in the gap through the connecting piece.
In one embodiment, when the thickness is greater than the gap and the gap is greater than the thickness of the connecting piece, the protruding free portion of the brightness enhancement film is bent, and the brightness enhancement film is contacted with the liquid crystal adhesive tape in the gap through the connecting piece at the bent position.
In one embodiment, when the thickness is greater than the gap and the gap is less than the thickness of the connection member, the protruding free portion of the brightness enhancement film is bent, and the brightness enhancement film is contacted with the liquid crystal adhesive tape through the connection member.
In one embodiment, when the thickness is greater than the gap and the gap is less than the thickness of the connecting piece, the protruding free portion of the brightness enhancement film is bent, and the brightness enhancement film is contacted with the liquid crystal adhesive tape at the bent position through the connecting piece.
In one embodiment, the connector is located within the back plate; and/or the number of the groups of groups,
bending the back plate; and/or the number of the groups of groups,
the connecting piece is pre-connected to the protruding free portion.
In one embodiment, the convex free part is bent to be abutted against the inner side of the backboard; alternatively, the brightness enhancing film contacts the inner side of the back plate through the connection member.
In one embodiment, a backlight module includes a backlight film set;
the backlight film group has the following structure:
when the thickness of the brightness enhancement film is smaller than or equal to the gap between the liquid crystal adhesive tape and the diffusion sheet, bending the convex free part of the brightness enhancement film so as to contact the liquid crystal adhesive tape in the gap;
when the thickness is larger than the gap and the gap is larger than or equal to the thickness of the connecting piece, the brightness enhancement film is contacted with the liquid crystal adhesive tape in the gap through the connecting piece;
and when the thickness is larger than the gap and the gap is smaller than the thickness of the connecting piece, the brightness enhancement film is contacted with the liquid crystal adhesive tape through the connecting piece.
In one embodiment, a display structure includes a backlight module;
the backlight module is provided with a backlight source diaphragm group with the following structure:
when the thickness of the brightness enhancement film is smaller than or equal to the gap between the liquid crystal adhesive tape and the diffusion sheet, bending the convex free part of the brightness enhancement film so as to contact the liquid crystal adhesive tape in the gap;
when the thickness is larger than the gap and the gap is larger than or equal to the thickness of the connecting piece, the brightness enhancement film is contacted with the liquid crystal adhesive tape in the gap through the connecting piece;
and when the thickness is larger than the gap and the gap is smaller than the thickness of the connecting piece, the brightness enhancement film is contacted with the liquid crystal adhesive tape through the connecting piece.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments or the conventional techniques of the present application, the drawings required for the descriptions of the embodiments or the conventional techniques will be briefly described below, and it is apparent that the drawings in the following descriptions are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
FIG. 1 is a schematic diagram of a conventional backlight product.
Fig. 2 is a schematic view of the first side structure of fig. 1.
Fig. 3 is a schematic view of a second side structure of fig. 1.
Fig. 4 is a schematic diagram of an edge structure of a backlight product according to the prior art.
Fig. 5 is a flow chart of an embodiment of a method for manufacturing a backlight film set according to the present application.
Fig. 6 is a schematic diagram of an embodiment of a backlight film set according to the present application.
Fig. 7 is a schematic diagram of another embodiment of a backlight film set according to the present application.
FIG. 8 is a schematic view of a portion of the three-dimensional structure of the embodiment shown in FIG. 7.
FIG. 9 is a schematic flow chart of the preparation method of the embodiment shown in FIG. 7.
Fig. 10 is a schematic diagram of another embodiment of a backlight film set according to the present application.
FIG. 11 is a schematic view of a portion of the three-dimensional structure of the embodiment of FIG. 10.
FIG. 12 is a schematic flow chart of the preparation method of the embodiment shown in FIG. 11.
Fig. 13 is a schematic view of another embodiment of a backlight film set according to the present application.
FIG. 14 is a schematic view of a portion of the three-dimensional structure of the embodiment of FIG. 13.
Fig. 15 is a schematic view of another embodiment of a backlight film set according to the present application.
Fig. 16 is a schematic view of another embodiment of a backlight film set according to the present application.
Reference numerals:
backlight film set 100, article 200, liquid crystal adhesive tape 110, diffusion sheet 120, brightness enhancement film 130, composite film layer 140, gap 150, back plate 160, connector 170, first lug position 101, second lug position 102;
a first width W1, a second width W2, a third width W3, a fourth width W4, a fifth width W5, and a sixth width W6.
Detailed Description
In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and the like are used in the description of the present application for the purpose of illustration only and do not represent the only embodiment.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" on a second feature may be that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through intermedial media. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely under the second feature, or simply indicating that the first feature is less level than the second feature.
Unless defined otherwise, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used in the description of the present application includes any and all combinations of one or more of the associated listed items.
For backlight products, it was found during analysis of conventional products that, as shown in fig. 4, the second width W2 between the back plate 160 or its support and the brightness enhancement film 130 is about 0.3 mm, and the thickness of the back plate 160 or its support, i.e., the first width W1, is about 2.5 mm; the thickness of the conventionally employed brightness enhancing film is about 0.09 millimeters, satisfying the second width W2. And as previously described, at the location of the lugs on the second side of the backlight film set, the film of the brightness enhancement film 130 is not in direct contact with the liquid crystal adhesive tape 110, but the film of the brightness enhancement film 130 has a convex portion at the location of the lugs. Therefore, the convex free part of the membrane of the brightness enhancement film, namely the lug position commonly called ear bending, is realized, the application is based on the fact that the lug of the membrane of the brightness enhancement film is lengthened and bent at the second side of the membrane and the binding adhesive tape is connected to the upper surface of the diffusion sheet or the side wall of the back plate, the bent brightness enhancement film can be adhered to the liquid crystal adhesive tape or the side wall of the back plate, and the membrane of the brightness enhancement film is fixed at the second side, so that the risk of deflection of the brightness enhancement film is reduced, and the details are as follows.
In one embodiment of the application, a method for manufacturing a backlight film set, a backlight module and a display structure comprise part or all of the technical features of the following embodiments; for example, the preparation method of the backlight film group comprises the following partial steps or all the steps. In one embodiment, a method for preparing a backlight film set includes the steps of: determining the gap between the liquid crystal adhesive tape and the diffusion sheet; determining the thickness of the brightness enhancement film; when the thickness is smaller than or equal to the gap, bending the convex free part of the brightness enhancement film so as to contact the liquid crystal adhesive tape in the gap; when the thickness is larger than the gap and the gap is larger than or equal to the thickness of the connecting piece, the brightness enhancement film is contacted with the liquid crystal adhesive tape in the gap through the connecting piece; and when the thickness is larger than the gap and the gap is smaller than the thickness of the connecting piece, the brightness enhancement film is contacted with the liquid crystal adhesive tape through the connecting piece. According to the preparation method of the backlight source diaphragm group, the brightness enhancement film is fixed on the premise of not changing the traditional production equipment and manufacturing process, so that the risk of deflection of the brightness enhancement film is reduced, the problem of blue edge display caused by deflection of the diaphragm is solved, and meanwhile, the manufacturing cost of a product is prevented from being increased; the connecting piece is assembled in the product, so that the overall length and width of the product are not influenced; in addition, the fixing mode does not enable the backlight source diaphragm group to be completely fixed, so that the risk of diaphragm wrinkling caused by ring measurement is eliminated.
In one embodiment, a method for preparing a backlight film set is shown in fig. 5, and includes the following steps: s100, determining a gap between the liquid crystal adhesive tape and the diffusion sheet; s200, determining the thickness of the brightness enhancement film; s300, judging whether the thickness is smaller than or equal to the gap, if yes, executing S400, otherwise executing S500; s400, bending the protruding free part of the brightness enhancement film to contact the liquid crystal adhesive tape in the gap; no further steps are performed. S500, judging whether the gap is larger than or equal to the thickness of the connecting piece, if so, executing S600, otherwise, executing S700; s600, enabling the brightness enhancement film to contact the liquid crystal adhesive tape in the gap through the connecting piece; no further steps are performed. And S700, enabling the brightness enhancement film to contact the liquid crystal adhesive tape through the connecting piece. The rest of the embodiments are analogized and will not be described in detail.
Different backlight products and the same backlight products manufactured by different manufacturing processes have slightly different details, so that the gap between the liquid crystal adhesive tape and the diffusion sheet needs to be determined in advance; the gap determines the subsequent steps of the method for manufacturing the backlight film set. In consideration of the compressibility of the thickness of the liquid crystal adhesive tape, further, after determining the gap between the liquid crystal adhesive tape and the diffusion sheet, an available gap is determined according to the gap, that is, the available gap is determined according to the gap between the liquid crystal adhesive tape and the diffusion sheet, and the available gap is taken as the actual gap, that is, the available gap is taken as the gap in other embodiments. The available gap is determined according to the gap and the deformation range of the liquid crystal adhesive tape, namely, the available gap can be larger than the gap between the liquid crystal adhesive tape and the diffusion sheet, and only the structural stability of a backlight source product is not affected after the liquid crystal adhesive tape is deformed.
The brightness enhancement film has certain flexibility and can be bent in practical application, so that the thickness of the brightness enhancement film needs to be determined first; this thickness determines whether the brightness enhancing film can be received in the gap after bending. In consideration of the warping force of the brightness enhancement film in the bending state, after determining the thickness of the brightness enhancement film, the thickness of the brightness enhancement film is further determined according to the thickness, that is, the thickness is taken as the initial thickness or the thickness of the body, and the thickness added by the additional warping of the brightness enhancement film towards the liquid crystal adhesive tape in the bending state is taken as the thickness of the brightness enhancement film in the bending state, and in other embodiments, the thickness of the brightness enhancement film is taken as the thickness of the brightness enhancement film in the bending state to replace the initial thickness or the thickness of the body. In actual measurement, according to different bending effects, the occupied thickness is often slightly 1% to 7% greater than the body thickness of the brightness enhancement film. That is, the space occupying thickness may be greater than the thickness of the brightness enhancement film, so as to ensure that the brightness enhancement film is inserted into the gap to contact the liquid crystal adhesive tape in a bent state, without affecting the structural stability of the backlight source product.
In one embodiment, the connector is pre-attached to the male free portion; further, the connecting member is pre-pressed, adhered or welded to the protruding free portion. Further, the connecting piece with the diffusion piece interval sets up, perhaps, the connecting piece with diffusion piece contact just the connecting piece with the diffusion piece is movably set up, so as to avoid fixing the diffusion piece leads to wholly fixing the back light source diaphragm group, thereby avoided owing to the back light source diaphragm group is fixed and is led to the ring to survey back diaphragm fold. In one embodiment, the connector is an auxiliary adhesive tape adhered to the protruding free portion of the brightness enhancing film. Further, the auxiliary adhesive tape and the diffusion sheet are movably arranged, that is, the auxiliary adhesive tape does not adhere to the diffusion sheet so as not to fix the diffusion sheet. The design is favorable for protecting the post-detection membrane, and avoids the phenomenon that the post-detection membrane is wrinkled due to the fact that the backlight source membrane group is driven by the diffusion sheet auxiliary adhesive tape to displace, so that poor products are caused.
In one embodiment, as shown in fig. 6, the thickness of the brightness enhancement film 130 is a third width W3, the gap between the liquid crystal adhesive tape 110 and the diffusion sheet 120 is a fourth width W4, and the object 200 acceptable for insertion into the gap is a fifth width W5; the space available for bending the brightness enhancing film 130 has a sixth width W6. Typically, as described above, the third width W3 is about 0.09 mm, and the sixth width W6 is smaller than the second width W2, so that bending is possible. The sixth width W6 defines a fifth width W5, and the fifth width W5 in turn defines specific steps of the method for manufacturing a backlight film set, thereby defining a selection of articles 200, as described in further detail below.
In one embodiment, when the thickness is equal to or less than the gap, bending the protruding free portion of the brightness enhancement film to contact the liquid crystal adhesive tape in the gap; in one embodiment, the protruding free portion of the brightness enhancement film is bent to form a U-shape. Further, the protruding free portion of the brightness enhancement film is extended, that is, the protruding portion of the brightness enhancement film at the lug position is additionally extended when the brightness enhancement film is prepared. It will be appreciated that for a backlight film set, the brightness enhancing film or film referred to as a brightness enhancing film must have a tab position, but only the tab position of the first side is in direct contact with the liquid crystal adhesive tape, whereas in conventional designs the second side is free and thus can be a protruding free portion, embodiments may utilize the tab position of the film of the brightness enhancing film directly or extend it, i.e. reserve more length as the protruding free portion for bending when cutting. Further, the convex free portion of the brightness enhancement film is thinned, for example, by 20% to 40%; this embodiment is difficult to implement, requires additional process steps, and increases costs; the protruding free portion is ground and thinned, for example, by a physical thinning method. For the embodiment of the protruding free portion thinning arrangement, the thickness, that is, the thickness of the brightness enhancement film is the thickness of the protruding free portion, or the thickness is the sum of the thickness of the protruding free portion and the thickness of the brightness enhancement film increased by the additional warpage of the brightness enhancement film toward the liquid crystal adhesive tape in the bent state. The design is favorable for reducing the thickness of the protruding free part of the brightness enhancement film, so that the thickness of the protruding free part can be inserted into the gap to contact with the liquid crystal adhesive tape, the second side of the product structure is firmly fixed, the diaphragm of the brightness enhancement film is prevented from being in a free state in the cavity, the problem of deflection of the brightness enhancement film caused by falling impact is solved, and the defect of deflection of the blue edge caused by deflection of the brightness enhancement film is avoided.
In one embodiment, as shown in fig. 7 and 8, when the fourth width W4 is large enough, the third width W3 and the space occupying thickness of the brightness enhancement film 130 can be fully accommodated, the lug position of the brightness enhancement film 130, that is, the ear length is lengthened, and the lug position of the film sheet of the brightness enhancement film is bent over the diffusion sheet 120 and then is adhered to the liquid crystal adhesive tape 110, and the lug position of the second side of the film sheet of the brightness enhancement film is bent and contacted with the liquid crystal adhesive tape to fix the brightness enhancement film on the second side. Referring to fig. 9, stacking of the composite membrane layer 140 is completed first. The incoming material of the brightness enhancement film then limits the extension of the lug locations and has bending locations where it may be further pre-treated, such as bending to form folds, or pre-bending. So that the convex free part of the brightness enhancement film can be bent conveniently, and a tool can be used for pressing and flattening by hands if necessary. The brightness enhancing film 130 is then laminated. And then the lamination of the diffusion sheet 120 is continued. The convex free portion of the brightness enhancing film 130 is then bent. Finally, a liquid crystal adhesive tape 110 is attached. In this embodiment, the object 200 is the brightness enhancement film 130 after being folded.
In one embodiment, the brightness enhancing film is folded within the back panel, i.e., the brightness enhancing film is folded within the back panel. In one embodiment, the protruding free portion is folded against the inner side of the back plate. In one embodiment, the connector is located within the back plate and is bent within the back plate. The rest of the embodiments are analogized and will not be described in detail. By the design, the brightness enhancement film at the second side is effectively fixed on the premise of not affecting the overall length and width of the product, namely, the additional position limitation on the brightness enhancement film is realized at the second side of the product structure, and the film of the brightness enhancement film is prevented from being in a free state in the cavity, so that the risk of deflection of the brightness enhancement film is reduced, and the problem of blue edge display caused by deflection of the film is solved.
In one embodiment, when the thickness is greater than the gap and the gap is greater than or equal to the thickness of the connecting piece, the brightness enhancement film is contacted with the liquid crystal adhesive tape in the gap through the connecting piece; in one embodiment, when the thickness is greater than the gap and the gap is greater than the thickness of the connecting piece, the protruding free portion of the brightness enhancement film is bent, and the brightness enhancement film is contacted with the liquid crystal adhesive tape in the gap through the connecting piece. Further, the convex free portion of the brightness enhancement film is bent to form an L-shape. In one embodiment, when the thickness is greater than the gap and the gap is greater than the thickness of the connecting piece, the protruding free portion of the brightness enhancement film is bent, and the brightness enhancement film is contacted with the liquid crystal adhesive tape in the gap through the connecting piece at the bent position. In such a design, the connecting piece is placed in the gap to contact the liquid crystal adhesive tape, so that the adhesive fixing effect is realized.
In one embodiment, as shown in fig. 10 and 11, when the fourth width W4 is smaller, for example, the third width W3 is greater than the fourth width W4, the connecting piece 170 may be adopted and bent and then adhered to the liquid crystal adhesive tape 110, so as to fix the brightness enhancement film 130 on the second side; the connector 170 is typically selected to have a fifth width W5 of 0.04 mm. In order to increase the contact area between the connecting member 170 and the brightness enhancement film 130, the protruding free portion of the brightness enhancement film 130 is bent to form an L shape in the present embodiment; that is, the film sheet of the brightness enhancement film 130 is indirectly bound by the connector 170, and the second side lug of the film sheet of the brightness enhancement film 130 is bent and contacted with the liquid crystal adhesive tape 110, so that the brightness enhancement film 130 is fixed on the second side. Referring to fig. 12, stacking of the composite membrane layer 140 is completed first. The incoming material of the brightness enhancement film then limits the extension of the tab locations and has a bending location and bonding tape as the connector 170, which may be further pre-treated at the bending location, such as bending to form a crease, or pre-bending. The brightness enhancing film 130 is then laminated. And then the lamination of the diffusion sheet 120 is continued. The convex free portion of the brightness enhancing film 130 is then bent, and the connection member 170 is bent. Finally, the liquid crystal adhesive tape 110 is attached, so that the liquid crystal adhesive tape 110 is contacted with the connecting piece 170 for adhesion. In the present embodiment, the object 200 is the connecting member 170 after bending.
In one embodiment, when the thickness is greater than the gap and the gap is less than the thickness of the connection member, the brightness enhancing film is contacted with the liquid crystal adhesive tape through the connection member. In one embodiment, when the thickness is greater than the gap and the gap is less than the thickness of the connection member, the protruding free portion of the brightness enhancement film is bent, and the brightness enhancement film is contacted with the liquid crystal adhesive tape through the connection member. Further, the convex free portion of the brightness enhancement film is bent to form an L-shape. In one embodiment, when the thickness is greater than the gap and the gap is less than the thickness of the connecting piece, the protruding free portion of the brightness enhancement film is bent, and the brightness enhancement film is contacted with the liquid crystal adhesive tape at the bent position through the connecting piece. The design is that the extending surface formed after the L-shaped bending has more contact area than the thickness of the brightness enhancement film, and the connecting piece is contacted with the liquid crystal adhesive tape as much as possible, so that the bonding and fixing effects are realized.
In one embodiment, the connector is located within the back plate. In one embodiment, the brightness enhancing film contacts the inside of the back plate through the connector. The design effectively fixes the brightness enhancement film at the second side on the premise of not influencing the overall length and width of the product, thereby reducing the risk of deflection of the brightness enhancement film, being beneficial to solving the problem of blue edge display caused by deflection of the film, and being beneficial to controlling the manufacturing cost of the product because the manufacturing process is changed very little and no new instrument or equipment is introduced.
If the gap between the liquid crystal adhesive tape 110 and the diffusion sheet 120 is too small, in one embodiment, as shown in fig. 13 and 14, the fourth width W4 is smaller than the thickness of the connecting piece 170, that is, the fifth width W5, for example, the fourth width W4 is smaller than 0.04 mm, and at this time, the brightness enhancement film 130 and the liquid crystal adhesive tape 110 may be designed to be directly bonded through the connecting piece 170; in this embodiment, the protruding free portion of the brightness enhancing film 130 is bent to form an L shape, and then adhered under the liquid crystal adhesive tape 110 by the connection member 170.
Further, the brightness enhancement film 130 may be adhered to a sidewall of the backlight cavity, such as the back plate 160 or a sidewall of a bracket thereof, so as to fix the brightness enhancement film 130 on one side, i.e. on the second side. In one embodiment, as shown in fig. 15, a portion of the structure of the backlight film set is different from the embodiment shown in fig. 13 in that the protruding free portion of the brightness enhancement film 130 is bent to form an L-shape, and then is adhered to the side wall of the back plate 160 through the connecting member 170. Alternatively, in one embodiment, as shown in fig. 16, a part of the structure of the backlight film set is different from the embodiment shown in fig. 15 in that the backlight film set is adhered to the lower side of the liquid crystal adhesive tape 110 and the side wall of the back plate 160 through the connecting member 170. Such a design is also advantageous for securing the second side of the brightness enhancing film 130.
In one embodiment, a backlight module includes a backlight film set; the backlight film group has the following structure: when the thickness of the brightness enhancement film is smaller than or equal to the gap between the liquid crystal adhesive tape and the diffusion sheet, bending the convex free part of the brightness enhancement film so as to contact the liquid crystal adhesive tape in the gap; when the thickness is larger than the gap and the gap is larger than or equal to the thickness of the connecting piece, the brightness enhancement film is contacted with the liquid crystal adhesive tape in the gap through the connecting piece; and when the thickness is larger than the gap and the gap is smaller than the thickness of the connecting piece, the brightness enhancement film is contacted with the liquid crystal adhesive tape through the connecting piece. In one embodiment, the backlight module has the backlight film set of any one of the embodiments. The design fixes the brightness enhancement film on the premise of not changing the traditional production equipment and manufacturing process, thereby reducing the risk of deflection of the brightness enhancement film, being beneficial to solving the problem of blue edge display caused by deflection of the film and avoiding increasing the manufacturing cost of the product; the connecting piece is assembled in the product, so that the overall length and width of the product are not influenced; moreover, the fixing mode does not enable the membrane to be completely fixed, so that the risk of membrane wrinkling caused by loop measurement is eliminated.
In one embodiment, a display structure includes a backlight module; the backlight module is provided with a backlight source diaphragm group with the following structure: when the thickness of the brightness enhancement film is smaller than or equal to the gap between the liquid crystal adhesive tape and the diffusion sheet, bending the convex free part of the brightness enhancement film so as to contact the liquid crystal adhesive tape in the gap; when the thickness is larger than the gap and the gap is larger than or equal to the thickness of the connecting piece, the brightness enhancement film is contacted with the liquid crystal adhesive tape in the gap through the connecting piece; and when the thickness is larger than the gap and the gap is smaller than the thickness of the connecting piece, the brightness enhancement film is contacted with the liquid crystal adhesive tape through the connecting piece. In one embodiment, the display structure or the backlight module thereof has the backlight film set according to any one of the embodiments. Such a design is advantageous in that, on the one hand, it is advantageous in preventing the poor blue edge after falling due to the design of the backlight film set, and on the other hand, it is advantageous in ensuring improvement on the inner side of the product to avoid changing the overall length-width dimension of the product.
It should be noted that other embodiments of the present application further include a method for manufacturing a backlight film set, a backlight module, and a display structure, where the method is capable of being implemented and is formed by combining technical features of the foregoing embodiments.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be determined from the following claims.
Claims (11)
1. The preparation method of the backlight source diaphragm group is characterized by comprising the following steps:
the liquid crystal adhesive tape, the diffusion sheet and the brightness enhancement film are sequentially overlapped, and the gap between the liquid crystal adhesive tape and the diffusion sheet is larger than 0;
determining the gap between the liquid crystal adhesive tape and the diffusion sheet;
determining the thickness of the brightness enhancement film;
the connecting piece is pre-connected to the protruding free part of the brightness enhancement film, and the connecting piece is arranged at intervals with the diffusion sheet, or the connecting piece is in contact with the diffusion sheet and is movably arranged with the diffusion sheet;
when the thickness is smaller than or equal to the gap, bending the convex free part of the brightness enhancement film so as to contact the liquid crystal adhesive tape in the gap;
when the thickness is larger than the gap and the gap is larger than or equal to the thickness of the connecting piece, the brightness enhancement film is contacted with the liquid crystal adhesive tape in the gap through the connecting piece;
and when the thickness is larger than the gap and the gap is smaller than the thickness of the connecting piece, the brightness enhancement film is contacted with the liquid crystal adhesive tape through the connecting piece.
2. The method of claim 1, wherein the protruding free portion of the brightness enhancement film is bent to form a U-shape.
3. The method of claim 1, wherein when the thickness is greater than the gap and the gap is greater than the thickness of the connecting member, bending the protruding free portion of the brightness enhancement film, and contacting the brightness enhancement film with the liquid crystal adhesive tape in the gap through the connecting member.
4. The method of claim 3, wherein when the thickness is greater than the gap and the gap is greater than the thickness of the connecting member, bending the protruding free portion of the brightness enhancement film, and contacting the brightness enhancement film with the liquid crystal adhesive tape in the gap through the connecting member at the bent position.
5. The method of claim 1, wherein when the thickness is greater than the gap and the gap is less than the thickness of the connecting member, bending the protruding free portion of the brightness enhancement film, and contacting the brightness enhancement film with the liquid crystal adhesive tape through the connecting member.
6. The method of claim 5, wherein when the thickness is greater than the gap and the gap is less than the thickness of the connecting member, bending the protruding free portion of the brightness enhancement film, and contacting the brightness enhancement film with the liquid crystal adhesive tape at the bent position through the connecting member.
7. The method of claim 1, wherein the connector is located within the back plate; and/or the number of the groups of groups,
bending is performed within the back plate.
8. The method according to any one of claims 1 to 7, wherein the protruding free portion is folded against the inner side of the back plate.
9. The method of any one of claims 1 to 7, wherein the brightness enhancement film contacts the inner side of the back plate via the connector.
10. A backlight module is characterized by comprising a backlight source diaphragm group;
the backlight film group has the following structure:
the liquid crystal adhesive tape, the diffusion sheet and the brightness enhancement film are sequentially overlapped, and the gap between the liquid crystal adhesive tape and the diffusion sheet is larger than 0;
the connecting piece is pre-connected to the protruding free part of the brightness enhancement film, and the connecting piece is arranged at intervals with the diffusion sheet, or the connecting piece is in contact with the diffusion sheet and is movably arranged with the diffusion sheet;
when the thickness of the brightness enhancement film is smaller than or equal to the gap between the liquid crystal adhesive tape and the diffusion sheet, bending the convex free part of the brightness enhancement film so as to contact the liquid crystal adhesive tape in the gap;
when the thickness is larger than the gap and the gap is larger than or equal to the thickness of the connecting piece, the brightness enhancement film is contacted with the liquid crystal adhesive tape in the gap through the connecting piece;
and when the thickness is larger than the gap and the gap is smaller than the thickness of the connecting piece, the brightness enhancement film is contacted with the liquid crystal adhesive tape through the connecting piece.
11. The display structure is characterized by comprising a backlight module;
the backlight module is provided with a backlight source diaphragm group with the following structure:
the liquid crystal adhesive tape, the diffusion sheet and the brightness enhancement film are sequentially overlapped, and the gap between the liquid crystal adhesive tape and the diffusion sheet is larger than 0;
the connecting piece is pre-connected to the protruding free part of the brightness enhancement film, and the connecting piece is arranged at intervals with the diffusion sheet, or the connecting piece is in contact with the diffusion sheet and is movably arranged with the diffusion sheet;
when the thickness of the brightness enhancement film is smaller than or equal to the gap between the liquid crystal adhesive tape and the diffusion sheet, bending the convex free part of the brightness enhancement film so as to contact the liquid crystal adhesive tape in the gap;
when the thickness is larger than the gap and the gap is larger than or equal to the thickness of the connecting piece, the brightness enhancement film is contacted with the liquid crystal adhesive tape in the gap through the connecting piece;
and when the thickness is larger than the gap and the gap is smaller than the thickness of the connecting piece, the brightness enhancement film is contacted with the liquid crystal adhesive tape through the connecting piece.
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