CN110568667A - backlight module and display device - Google Patents
backlight module and display device Download PDFInfo
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- CN110568667A CN110568667A CN201910876799.3A CN201910876799A CN110568667A CN 110568667 A CN110568667 A CN 110568667A CN 201910876799 A CN201910876799 A CN 201910876799A CN 110568667 A CN110568667 A CN 110568667A
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- panel
- guide plate
- light guide
- light
- backlight module
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- 239000000853 adhesive Substances 0.000 claims abstract description 92
- 230000001070 adhesive effect Effects 0.000 claims abstract description 92
- 239000000758 substrate Substances 0.000 claims description 8
- 238000004026 adhesive bonding Methods 0.000 abstract description 15
- 238000012360 testing method Methods 0.000 abstract description 15
- 230000032683 aging Effects 0.000 abstract description 14
- 230000003287 optical effect Effects 0.000 abstract description 10
- 230000008878 coupling Effects 0.000 description 10
- 238000010168 coupling process Methods 0.000 description 10
- 238000005859 coupling reaction Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 235000009537 plain noodles Nutrition 0.000 description 1
- 239000002096 quantum dot Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
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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
-
- 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The embodiment of the application provides a backlight module and a display device. The backlight module comprises: the backlight module comprises a back plate, a light source, a light guide plate and an adhesive piece; the back plate comprises a first panel, a second panel and a third panel, the projection of the first panel falls into the third panel, and the second panel is respectively connected with the first panel and the third panel; the light source is fixedly connected with the first panel, the second panel or the third panel; the light guide plate is arranged between the first panel and the third panel, the first panel partially covers the light guide plate, and the light inlet end of the light guide plate is abutted to the light source; the adhesive connecting piece comprises a first adhesive connecting piece and a second adhesive connecting piece; the first gluing piece is arranged on one side, close to the light guide plate, of the first panel and is connected with the light guide plate; the second gluing piece is arranged on one side, away from the light guide plate, of the first panel and is used for being connected with the display module. The embodiment of the application can overcome the negative influence of the aging test and ensure the optical quality of the display device.
Description
Technical Field
The application relates to the technical field of display, in particular to a backlight module and a display device.
Background
Generally, before the display device is shipped, an Aging test is usually performed to distinguish a defective finished product, but the brightness of the finished product subjected to the Aging test is likely to decrease, i.e., the Aging test adversely affects the quality of the finished product.
Thus, the negative impact of burn-in testing is to be overcome, providing a solution for ensuring the optical quality of the display device.
Disclosure of Invention
the application aims at the defects of the prior art and provides a backlight module and a display device, which are used for solving the technical problem that the brightness of the display device is reduced through aging test in the prior art.
In a first aspect, an embodiment of the present application provides a backlight module, including: the backlight module comprises a back plate, a light source, a light guide plate and an adhesive piece;
The back plate comprises a first panel, a second panel and a third panel, the projection of the first panel falls into the third panel, and the second panel is respectively connected with the first panel and the third panel;
The light source is fixedly connected with the first panel, the second panel or the third panel;
the light guide plate is arranged between the first panel and the third panel, the first panel partially covers the light guide plate, and the light inlet end of the light guide plate is abutted to the light source;
the adhesive connecting piece comprises a first adhesive connecting piece and a second adhesive connecting piece;
the first gluing piece is arranged on one side, close to the light guide plate, of the first panel and is connected with the light guide plate;
the second gluing piece is arranged on one side, away from the light guide plate, of the first panel and is used for being connected with the display module.
in a second aspect, an embodiment of the present application provides a display device, including: the backlight module provided in the first aspect, and a display module;
The display module is adhered to the second adhesive piece of the backlight module, and the light incident surface of the display module corresponds to the light emergent surface of the light guide plate of the backlight module.
the technical scheme provided by the embodiment of the application has the following beneficial technical effects:
the first gluing piece is arranged on one side of the first panel close to the light guide plate, so that the fixed point of the light guide plate is moved from the position far away from the light source to the position close to the light source in the prior art, the length of the light guide plate between the fixed point and the light source is greatly shortened, the shorter the length of the light guide plate is, the smaller the extension amount generated during thermal expansion (such as in an aging test) is, the smaller the displacement possibly generated between the first gluing piece and the light guide plate is, in addition, the first gluing piece can have a certain elastic space, the elastic space of the first gluing piece provides a certain extension space for the light guide plate, and after the aging test is finished and the light guide plate is cooled and shrunk, the first gluing piece can reset the light guide plate to a certain extent, reduce the GAP possibly generated between the light incident end of the light guide plate and the light emitting surface of the light source, and reduce the coupling, the brightness loss of the backlight module is greatly reduced. When the extension of the partial light guide plate is small enough, even the abutting relation between the light inlet end of the light guide plate and the light emitting surface of the light source can be recovered, namely the coupling degree of the light guide plate and the light source is completely recovered, and the brightness quality of the backlight module is ensured;
on the other hand, in the backlight module provided in this embodiment, the first panel is located on one side of the light-emitting surface of the light guide plate in the back plate structure, and the first adhesive member is disposed on one side of the first panel close to the light guide plate, so that the first adhesive member can prevent the first adhesive member from affecting the light-emitting surface of the backlight module, such as black spots, under a normal viewing angle, and the optical quality of the backlight module can be ensured.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
the foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
Fig. 1 is a schematic structural diagram of a first embodiment of a backlight module according to an embodiment of the present disclosure;
Fig. 2 is a schematic structural diagram of a second embodiment of a backlight module according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a third embodiment of a backlight module according to an embodiment of the present disclosure;
FIG. 4 is a top view of FIG. 2 or FIG. 3 with the second adhesive attachment piece removed;
Fig. 5 is a schematic structural diagram of a first embodiment of a display device according to an embodiment of the present disclosure;
fig. 6 is a schematic view illustrating a light emitting principle of a display device according to an embodiment of the present disclosure;
In the figure:
100-a backlight module;
110-a back-plate;
111-a first panel; 111 a-vias; 112-a second panel; 113-a third panel;
120-a light source; 130-a light guide plate;
140-gluing; 141-a first adhesive connection; 142-a second adhesive connection;
150-a reflector; 151-a first reflector; 152-a second reflector;
160-a first dimming film layer;
200-a display module;
210-a bottom polarizing layer; 220-an array substrate; 230-a second dimming film layer; 240-top polarizing layer.
Detailed Description
reference will now be made in detail to the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts or parts having the same or similar functions throughout. In addition, if a detailed description of the known art is not necessary for illustrating the features of the present application, it is omitted. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
it will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features and/or components, but do not preclude the presence or addition of one or more other features, components, and/or groups thereof. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
the inventors of the present application have conducted research and found that a display device having a backlight generally employs a combination of a light source and a light guide plate to provide the backlight, and specifically, light is guided by abutting a light incident end of the light guide plate on a light emitting surface of the light source. The light guide plate realizes the location through the gluing piece, and the gluing piece all sets up in the one end that the light source was kept away from to the light guide plate. When the display carries out aging test, the light guide plate can be heated and expand, because the income light end of light guide plate is the butt on the light emitting area of light source, the income light end extension of light guide plate is obstructed, the light guide plate can only extend to the direction of keeping away from the light source, this position that the piece of gluing is connected the light guide plate has just made and has taken place the removal, after aging test is finished, the light guide plate cooling shrink, the light guide plate is influenced by the fixed connection of gluing the piece this moment, its income light end all shrinks to the new fixed position of gluing the piece with the one end of keeping away from the light source, this income light end that has just led to the light guide plate breaks away from the play plain noodles of light source, GAP (clearance) appears. The larger the GAP, the poorer the coupling between the light guide plate and the light source, and the lower the brightness of the light guided out by the light guide plate.
the application provides a backlight unit and display device aims at solving prior art technical problem as above.
The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments.
the embodiment of the present application provides a backlight module 100, and a schematic structural diagram of the backlight module 100 is shown in fig. 1, and includes: a back plate 110, a light source 120, a light guide plate 130, and an adhesive member 140;
The back plate 110 comprises a first panel 111, a second panel 112 and a third panel 113, the projection of the first panel 111 falls into the third panel 113, and the second panel 112 is respectively connected with the first panel 111 and the third panel 113;
The light source 120 is fixedly connected with the first panel 111, the second panel 112 or the third panel 113;
The light guide plate 130 is disposed between the first panel 111 and the third panel 113, the first panel 111 partially covers the light guide plate 130, and a light incident end of the light guide plate 130 abuts against the light source 120;
The adhesive coupling 140 includes a first adhesive coupling 141 and a second adhesive coupling 142;
the first adhesive member 141 is disposed on one side of the first panel 111 close to the light guide plate 130, and the first adhesive member 141 is connected to the light guide plate 130;
the second adhesive member 142 is disposed on a side of the first panel 111 away from the light guide plate 130, and the second adhesive member 142 is used for connecting the display module 200.
in the embodiment, the first adhesive member 141 is disposed on one side of the first panel 111 close to the light guide plate 130, so that the fixing point of the light guide plate 130 is moved from a position far away from the light source 120 to a position close to the light source 120 in the prior art, thereby greatly shortening the length of the light guide plate 130 between the fixing point and the light source 120, the shorter the length of the light guide plate 130 is, the smaller the extension amount generated during thermal expansion (for example, in an aging test) is, the smaller the displacement that may occur between the first adhesive member 141 and the light guide plate 130 is, and in addition, the first adhesive member 141 may have a certain elastic space, the elastic space of the first adhesive member 141 provides a certain extension space for the light guide plate 130, and when the aging test is finished and the light guide plate 130 is cooled and shrunk, the first adhesive member 141 can reset the light guide plate 130 to a certain extent, thereby reducing a GAP that may be generated between the light incident end of the light guide, the coupling degree between the light guide plate 130 and the light source 120 is reduced as much as possible, and the brightness loss of the backlight module 100 is greatly reduced. When the extension of the aforementioned part of the light guide plate 130 is sufficiently small, even the abutting relationship between the light incident end of the light guide plate 130 and the light emitting surface of the light source 120 can be recovered, that is, the coupling degree between the light guide plate 130 and the light source 120 is completely recovered, thereby ensuring the brightness quality of the backlight module 100.
on the other hand, in the backlight module 100 provided in this embodiment, the first panel 111 is a side of the back plate 110 structure that is located on the light-emitting surface of the light guide plate 130, and the first adhesive member 141 is disposed on a side of the first panel 111 that is close to the light guide plate 130, so as to avoid the influence, such as black specks, on the light emitted from the backlight module 100 by the first adhesive member 141 under a normal viewing angle, and ensure the optical quality of the backlight module 100.
alternatively, the light source 120 may include an LED (light emitting diode) and an FPC (Flexible Printed Circuit), the LED being fixedly connected to the FPC, and the FPC being fixedly connected to the first panel 111, the second panel 112, or the third panel 113 of the rear panel 110 according to design requirements.
Optionally, the first adhesive member 141 and the second adhesive member 142 may both adopt a fixing tape, and are respectively connected to the light guide plate 130 and the display module 200 in an adhesion manner, so as to facilitate thinning of the film assembly and simplify the process.
The inventors of the present application considered that the first and second adhesive members 141 and 142 are respectively disposed at both sides of the first panel 111, and if they can be associated with each other, more elastic space can be obtained. Therefore, the present application provides one possible implementation manner for the backplane 110 as follows:
As shown in fig. 2 or 3, the first panel 111 of the embodiment of the present application has at least one through hole 111a, and the first adhesive member 141 penetrates through the through hole 111a of the first panel 111 and is connected to the second adhesive member 142;
Or, the second adhesive piece 142 penetrates through the through hole 111a of the first panel 111 and is connected with the second adhesive piece 142;
alternatively, the first and second adhesive members 141 and 142 each extend into the through-hole 111a and are connected within the through-hole 111 a.
the embodiment provides three ways to connect the first adhesive member 141 and the second adhesive member 142, which correspond to the connection at the two openings of the through hole 111a of the first panel 111 and the connection inside the through hole 111 a.
optionally, the first adhesive member 141 and the second adhesive member 142 are integrally formed, for example, the whole is an adhesive structure with a T-shaped cross section, and the first adhesive member 141 or the second adhesive member 142 partially penetrates through the through hole 111a, so that the light guide plates 130 and the display module 200 on two sides of the first panel 111 are adhered to each other, thereby simplifying the mounting process.
the inventor of the present application considers that the light guide plate 130 inevitably has light loss phenomena such as light escape during the light guiding process, and the light loss may reduce the brightness of the backlight module 100, thereby affecting the optical quality. Therefore, the present application provides one possible implementation manner for the backlight module 100 as follows:
As shown in fig. 1 to 3, the backlight module 100 of the embodiment of the present application further includes a reflective plate 150, where the reflective plate 150 includes a first reflective plate 151 and a second reflective plate 152;
the first reflective plate 151 is disposed between the third panel 113 and the light guide plate 130;
the second light reflecting plate 152 is disposed between the first panel 111 and the light guide plate 130.
In this embodiment, the first reflective plate 151 may be used to capture the escaping light from the light guide plate 130 near the third panel 113, and recycle the escaping light to the light guide plate 130, and further guide the escaping light to the light exit of the backlight module 100. The second reflector 152 is used to capture the escaping light from the light guide plate 130 near the first panel 111, and also recycle the escaping light to the light guide plate 130 to continue to be guided to the light exit of the backlight module 100. Thereby reducing light loss and ensuring the optical quality of the backlight module 100.
the inventor of the present application considers that when light obliquely enters another medium from one medium, the propagation direction is changed, so that the light rays are deflected at the boundary of different media, which is also the refraction principle of light. If the escaping light captured and recovered by the first and second light-reflecting plates 151 and 152 is excessively deflected after entering the light guide plate 130, the light-emitting angle of the recovered escaping light is affected, and the optical quality of the backlight module 100 is affected. For this reason, the present application provides one possible implementation manner for the installation positions of the first reflector 151 and the second reflector 152 as follows:
As shown in fig. 1 to 3, the first light reflecting plate 151 of the embodiment of the present disclosure is attached to a side of the light guide plate 130 close to the third panel 113, and/or the second light reflecting plate 152 is attached to a side of the light guide plate 130 close to the first panel 111.
in this embodiment, the first reflective plate 151 and/or the second reflective plate 152 are attached to the light guide plate 130, so that the occurrence probability of an air layer or other medium between the two reflective plates 150 and the light guide plate 130 is reduced, the initial angle of the escaping light in the light guide plate 130 is reduced to the maximum extent, and the light guide plate 130 is facilitated to continue guiding.
the inventor of the present application considers that the second light reflecting plate 152 and the first adhesive member 141 are disposed on the same side of the first panel 111, and if the second light reflecting plate 152 and the first adhesive member 141 can be associated, the backlight module 100 may have the advantages of simplifying the structure, or simplifying the installation process. Therefore, the present application provides one possible implementation manner for the installation manner of the second reflection plate 152 as follows:
As shown in fig. 1 to 3, the first adhesive member 141 and the second reflective plate 152 of the present embodiment are connected to each other, so that the second reflective plate 152 is attached to one side of the light guide plate 130 close to the first panel 111.
In this embodiment, the second light reflecting plate 152 is associated with the first adhesive member 141, and the first adhesive member 141 is used to fix the second light reflecting plate 152, so that the utilization rate of the first adhesive member 141 is improved, the structure of the backlight module 100 is simplified, and the mounting process is also simplified.
The inventor of the present application considers that the second reflector 152 and the first adhesive member 141 are disposed on the same side of the first panel 111, and the positional relationship between the second reflector 152 and the first adhesive member 141 needs to be well matched. Therefore, the present application provides one possible implementation manner for the installation manner of the second reflection plate 152 as follows:
the second light reflecting plate 152 of the embodiment of the application is attached to the first panel 111 at a side close to the light guide plate 130;
Or, one side of the second reflective plate 152 away from the light guide plate 130 is connected to the first adhesive member 141.
As shown in fig. 2, one side of the second light reflecting plate 152 away from the light guide plate 130 is attached to one side of the first panel 111 close to the light guide plate 130, that is, the side of the second light reflecting plate 152 is adhered to the first adhesive member 141 to be fixed.
as shown in fig. 3, a side of the second reflective plate 152 away from the light guide plate 130 is connected to the first adhesive member 141, that is, the second reflective plate 152 is fixed by the first adhesive member 141, and the second reflective plate 152 abuts against the light guide plate 130, so that the light guide plate 130 is relatively fixed.
the inventor of the present application considers that the backlight led out from the backlight module 100 through the light guide plate 130 generally needs to be processed to better match the requirements of the display module 200 and other structures. Therefore, the present application provides one possible implementation manner for the backlight module 100 as follows:
As shown in fig. 1 to 3, the backlight module 100 of the embodiment of the present disclosure further includes a first light modulation film layer 160, and the first light modulation film layer 160 is disposed on a side of the light guide plate 130 away from the third panel 113.
In this embodiment, the first light-adjusting film layer 160 is adopted to adjust the backlight to a certain degree, so as to meet the requirements of the display module 200 and provide better optical quality.
alternatively, the first dimming film layer 160 may be a stacked arrangement of two diffusion sheets and one prism sheet.
The inventor of the present application considers that the arrangement of the through holes 111a on the first panel 111 affects the overall layout of the backlight module 100, and also affects the arrangement of the first adhesive member 141 or the second adhesive member 142. For this reason, the present application provides one possible implementation manner for the through hole 111a on the first panel 111 as follows:
As shown in fig. 4, the cross section of the through hole 111a of the embodiment of the present application, which is perpendicular to the axial direction thereof, is a bar shape;
and/or, the through holes 111a are provided in plurality and distributed at intervals on the first panel 111.
the through hole 111a in this embodiment has a strip-shaped cross section, for example: the shape of the rectangle, the ellipse, or the racetrack is to increase the connection area between the first adhesive member 141 and the second adhesive member 142, and also to enhance the deformation resistance along the length direction of the strip-shaped through hole 111a, thereby enhancing the connection strength between the first adhesive member 141 and the second adhesive member 142. The plurality of through holes 111a are formed in the first panel 111 at intervals, so that connection points between the first adhesive member 141 and the second adhesive member 142 can be increased, and the connection strength between the first adhesive member 141 and the second adhesive member 142 can be enhanced.
Alternatively, the through holes 111a may be spaced apart in a direction where the first panel 111 and the second panel 112 intersect, or may be spaced apart in a direction perpendicular to the intersection of the first panel 111 and the second panel 112.
based on the same inventive concept, embodiments of the present application provide a display device, a schematic structural framework of which is shown in fig. 5 and 6, and the display device includes: the backlight module 100 and the display module 200 according to any of the above embodiments;
the display module 200 is adhered to the second adhesive member 142 of the backlight module 100, and the light incident surface of the display module 200 corresponds to the light emitting surface of the light guide plate 130 of the backlight module 100.
in the display device provided in this embodiment, the display module 200 is matched with the backlight module 100 to achieve the display effect. By adopting the backlight module 100 provided in any of the above embodiments, the display device has the beneficial effects of overcoming the negative effects of the aging test and ensuring the optical quality of the display device, which are not described herein again.
The inventor of the present application considers that the display module 200 needs to be matched with the backlight module 100 to achieve the display effect. Therefore, the present application provides the following possible implementation manner for the display module 200:
As shown in fig. 5 and 6, the display module 200 of the embodiment of the present application includes: a bottom polarizing layer 210, an array substrate 220, a second dimming film layer 230 and a top polarizing layer 240 arranged in a stack;
the bottom polarizing layer 210 corresponds to the light guide plate 130 of the backlight module 100;
The array substrate 220 is disposed between the bottom polarizing layer 210 and the top polarizing layer 240;
The second dimming film layer 230 is disposed between the array substrate 220 and the top polarizing layer 240.
Optionally, the second dimming film layer 230 includes a liquid crystal encapsulation layer and a real color film layer which are stacked.
optionally, the second dimming film layer 230 includes a stacked liquid crystal encapsulation layer, a quantum dot layer, and a real color film layer.
by applying the embodiment of the application, at least the following beneficial effects can be realized:
1. the first adhesive member 141 is disposed on one side of the first panel 111 close to the light guide plate 130, such that a fixing point of the light guide plate 130 moves from a position far away from the light source 120 to a position close to the light source 120 in the prior art, thereby greatly shortening the length of the light guide plate 130 between the fixing point and the light source 120, the shorter the length of the light guide plate 130 is, the smaller the extension amount generated during thermal expansion (e.g. in an aging test) is, the smaller the displacement that may occur between the first adhesive member 141 and the light guide plate 130 is, and in addition, the first adhesive member 141 may have a certain elastic space, the elastic space of the first adhesive member 141 provides a certain extension space for the light guide plate 130, and when the aging test is finished and the light guide plate 130 is cooled and shrunk, the first adhesive member 141 can reset the light guide plate 130 to reduce a GAP that may occur between the light incident end of the light guide plate 130 and the light emitting surface of the, the coupling degree between the light guide plate 130 and the light source 120 is reduced as much as possible, so that the brightness loss of the backlight module 100 is greatly reduced;
2. When the extension of the aforementioned part of the light guide plate 130 is sufficiently small, even the abutting relationship between the light incident end of the light guide plate 130 and the light emitting surface of the light source 120 can be recovered, that is, the coupling degree between the light guide plate 130 and the light source 120 is completely recovered, so as to ensure the brightness quality of the backlight module 100;
3. the first panel 111 is located on one side of the light-emitting surface of the light guide plate 130 in the structure of the back plate 110, and the first adhesive member 141 is disposed on one side of the first panel 111 close to the light guide plate 130, so as to avoid the influence, such as black specks, on the light-emitting of the backlight module 100 caused by the first adhesive member 141 under a normal viewing angle, and ensure the optical quality of the backlight module 100.
Those of skill in the art will appreciate that the various operations, methods, steps in the processes, acts, or solutions discussed in this application can be interchanged, modified, combined, or eliminated. Further, other steps, measures, or schemes in various operations, methods, or flows that have been discussed in this application can be alternated, altered, rearranged, broken down, combined, or deleted. Further, steps, measures, schemes in the prior art having various operations, methods, procedures disclosed in the present application may also be alternated, modified, rearranged, decomposed, combined, or deleted.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable 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 in specific cases to those skilled in the art.
in the description herein, particular features, structures, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.
Claims (10)
1. A backlight module (100), comprising: a back plate (110), a light source (120), a light guide plate (130) and an adhesive piece (140);
the back plate (110) comprises a first panel (111), a second panel (112) and a third panel (113), the projection of the first panel (111) falls within the third panel (113), the second panel (112) connects the first panel (111) and the third panel (113) respectively;
the light source (120) is fixedly connected with the first panel (111), the second panel (112) or the third panel (113);
the light guide plate (130) is arranged between the first panel (111) and the third panel (113), the first panel (111) partially covers the light guide plate (130), and the light inlet end of the light guide plate (130) is abutted to the light source (120);
The adhesive connection (140) comprises a first adhesive connection (141) and a second adhesive connection (142);
The first adhesive piece (141) is arranged on one side of the first panel (111) close to the light guide plate (130), and the first adhesive piece (141) is connected with the light guide plate (130);
The second adhesive piece (142) is arranged on one side, far away from the light guide plate (130), of the first panel (111), and the second adhesive piece (142) is used for being connected with a display module (200).
2. the backlight module (100) according to claim 1, wherein the first panel (111) has at least one through hole (111a), and the first adhesive member (141) penetrates through the through hole (111a) of the first panel (111) and is connected to the second adhesive member (142);
or, the second adhesive piece (142) penetrates through the through hole (111a) of the first panel (111) and is connected with the second adhesive piece (142);
Or, the first adhesive piece (141) and the second adhesive piece (142) both extend into the through hole (111a) and are connected in the through hole (111 a).
3. The backlight module (100) according to claim 2, wherein the backlight module (100) further comprises a reflector (150), the reflector (150) comprising a first reflector (151) and a second reflector (152);
The first light reflecting plate (151) is disposed between the third panel (113) and the light guide plate (130);
The second light reflecting plate (152) is disposed between the first panel (111) and the light guide plate (130).
4. the backlight module (100) according to claim 3, wherein the first light reflecting plate (151) is attached to a side of the light guide plate (130) close to the third panel (113), and/or the second light reflecting plate (152) is attached to a side of the light guide plate (130) close to the first panel (111).
5. the backlight module (100) according to claim 3, wherein the first adhesive member (141) is connected to the second light reflecting plate (152) such that the second light reflecting plate (152) is attached to the light guide plate (130) at a side close to the first panel (111).
6. The backlight module (100) according to claim 5, wherein a side of the second light reflecting plate (152) away from the light guide plate (130) is attached to a side of the first panel (111) close to the light guide plate (130);
or, one side of the second light reflecting plate (152) far away from the light guide plate (130) is connected with the first adhesive piece (141).
7. The backlight module (100) according to any one of claims 1-6, wherein the backlight module (100) further comprises a first dimming film layer (160), and the first dimming film layer (160) is disposed on a side of the light guide plate (130) away from the third panel (113).
8. the backlight module (100) according to any one of claims 2-6, wherein the cross section of the through hole (111a) perpendicular to the axial direction thereof is bar-shaped;
and/or the through holes (111a) are multiple and distributed at intervals on the first panel (111).
9. A display device, comprising: a backlight module (100) according to any of claims 1-8, and a display module (200);
the display module (200) is adhered to the second adhesive piece (142) of the backlight module (100), and the light incident surface of the display module (200) corresponds to the light emergent surface of the light guide plate (130) of the backlight module (100).
10. the display device according to claim 9, wherein the display module (200) comprises: the array substrate comprises a bottom polarizing layer (210), an array substrate (220), a second dimming film layer (230) and a top polarizing layer (240) which are arranged in a stacked mode;
the bottom polarizing layer (210) corresponds to the light guide plate (130) of the backlight module (100);
The array substrate (220) is disposed between the bottom polarizing layer (210) and the top polarizing layer (240);
The second dimming film layer (230) is disposed between the array substrate (220) and the top polarizing layer (240).
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| CN201910876799.3A CN110568667B (en) | 2019-09-17 | 2019-09-17 | Backlight module and display device |
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| CN110568667B (en) | 2022-06-07 |
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