CN111208674A - Backlight module, display device and assembling method of backlight module - Google Patents
Backlight module, display device and assembling method of backlight module Download PDFInfo
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- CN111208674A CN111208674A CN202010127836.3A CN202010127836A CN111208674A CN 111208674 A CN111208674 A CN 111208674A CN 202010127836 A CN202010127836 A CN 202010127836A CN 111208674 A CN111208674 A CN 111208674A
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- light
- guide plate
- light guide
- backlight module
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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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0051—Diffusing sheet or layer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0066—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 characterised by the light source being coupled to the light guide
- G02B6/0073—Light emitting diode [LED]
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention relates to a backlight module, which comprises a light guide plate, a light source and a backlight module, wherein the light guide plate comprises a light incident surface, a bottom surface and a light emergent surface which are adjacent to the light incident surface, and the bottom surface and the light emergent surface are arranged oppositely; the light bar is arranged on the light incident side of the light guide plate, and comprises a flexible circuit board and a plurality of LEDs which are sequentially arranged from the light emergent surface to the bottom surface, and the LEDs are electrically connected to the flexible circuit board; the glue frame wraps the periphery of the light guide plate, the cross section of the glue frame in the first direction is L-shaped, the glue frame comprises a first part and a second part, the first part is located on one side, away from the light incident surface, of the LEDs, the second part is connected to one side, away from the flexible circuit board, of the LEDs, and the first direction is the direction from the light emergent surface of the light guide plate to the bottom surface of the light guide plate. The invention also relates to an assembly method of the display device and the backlight module.
Description
Technical Field
The invention relates to the technical field of manufacturing of display products, in particular to a backlight module, a display device and an assembling method of the backlight module.
Background
Fingerprints under an LCD (Liquid Crystal Display) screen are a future technical trend, and the existing iron back panel backlight can generate a certain shielding effect on 5G signals to influence signal transmission; the iron-free back plate backlight is also suitable for the fingerprint under the screen, but if the traditional scheme of the back plate-free backlight is used, the narrow lower frame is difficult to achieve.
Disclosure of Invention
In order to solve the technical problems, the invention provides a backlight module, a display device and an assembling method of the backlight module, and solves the problem that narrow frames are difficult to realize for finger print products under a screen due to the limitation of a rubber frame.
In order to achieve the purpose, the invention adopts the technical scheme that: a backlight module includes:
the light guide plate comprises a light incident surface, a bottom surface and a light emergent surface, wherein the bottom surface and the light emergent surface are adjacent to the light incident surface and are arranged oppositely;
the light bar is arranged on the light incident side of the light guide plate, and comprises a flexible circuit board and a plurality of LEDs which are sequentially arranged from the light emergent surface to the bottom surface, wherein the LEDs are electrically connected to the flexible circuit board;
the glue frame wraps the periphery of the light guide plate, the cross section of the glue frame in the first direction is L-shaped, the glue frame comprises a first part and a second part, the first part is located on one side, away from the light incident surface, of the LEDs, the second part is connected to one side, away from the flexible circuit board, of the LEDs, and the first direction is the direction from the light emergent surface of the light guide plate to the bottom surface of the light guide plate.
Optionally, the first portion is connected to the flexible circuit board through a first adhesive layer, and the second portion and the plurality of LEDs are connected and fixed through a second adhesive layer.
Optionally, the second adhesive layer includes a first adhesive portion extending to the first region of the light exit surface of the light guide plate.
Optionally, the first region of the light guide plate close to the LEDs includes a plurality of bright regions and dark regions arranged at intervals, and the first bonding portion is bonded to the dark regions in a zigzag manner.
Optionally, a diffusion sheet is disposed on a light-emitting surface of the light guide plate, the diffusion sheet covers the first bonding portion, and a light shielding strip is disposed on an area of the diffusion sheet corresponding to the first bonding portion.
Optionally, a prism sheet playing a role in condensing light is arranged on one side, away from the light guide plate, of the diffusion sheet, and a light shielding layer is arranged on the prism sheet and the rubber frame and covers an edge area, close to the light bar, of the prism sheet.
Optionally, a gasket for supporting a single-layer region of the display panel is disposed on the light shielding layer, or the light shielding layer extends from a portion connected to the prism sheet to the rubber frame in an inclined manner along a direction from the bottom surface of the light guide plate to the light exit surface of the light guide plate.
Optionally, the bottom surface of the light guide plate is provided with a reflector plate, the reflector plate is provided with graphite connection glue between the flexible circuit board, one end of the graphite connection glue is located on one side of the light guide plate away from the reflector plate and covers a part of the reflector plate, and the other end of the graphite connection glue is located on one side of the flexible circuit board away from the LEDs and covers a part of the flexible circuit board.
The invention also provides a display device comprising the backlight module.
The invention also provides an assembling method of the backlight module, the first part is connected to the flexible circuit board through a first bonding layer, the second part is fixedly connected with the LEDs through a second bonding layer, the second bonding layer comprises a first bonding part extending to the first area of the light-emitting surface of the light guide plate,
the method comprises the following steps:
connecting the light bar with the light guide plate through a second bonding layer;
the first part of the rubber frame is connected with the flexible circuit board of the lamp strip through the first bonding layer, and the second part of the rubber frame is connected with the LED of the lamp strip through the second bonding layer.
The invention has the beneficial effects that: will the LED and the flexible line way board of lamp strip are along following go out the plain noodles to the direction of bottom surface sets gradually, glues the top that the frame can extend to LED like this, when guaranteeing to support intensity, realizes narrow frame.
Drawings
FIG. 1 is a schematic diagram of a backlight module according to the related art;
FIG. 2 is a schematic view of a backlight module according to an embodiment of the invention;
FIG. 3 is a schematic view of an embodiment of a light bar and a light guide plate after assembly;
FIG. 4 is a schematic diagram illustrating an assembled plastic frame, a light bar, and a light guide plate according to an embodiment of the invention;
FIG. 5 is a schematic view of a display device according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Fingerprints under an LCD screen are a future technical trend, the existing iron back plate backlight can generate a certain shielding effect on 5G signals to influence signal transmission, and a fingerprint sensor sends signals and receives signals to pass through a backlight module; the iron-free back plate backlight is also suitable for fingerprints under a screen, but if the traditional scheme of the back plate-free backlight is used, a narrow lower frame is difficult to achieve, as shown in fig. 1, after the back plate is removed, in order to ensure the supporting strength and prevent the deformation of the rubber frame, the rubber frame needs to be wide, in fig. 1, the light bar 3 comprises an LED 31 and a flexible circuit board 32 which are sequentially arranged along the light emergent direction of the light guide plate, part of the flexible circuit board 32 is positioned above the light guide plate 1, and it can be seen that the arrangement of the light bar 3 occupies a certain space, under the structure, the cross section of the rubber frame 2 in the light emergent direction of the light guide plate 1 is of a T-shaped structure, and is positioned on one side of the light bar 3 away from the light guide plate, and comprises a first part parallel to the light emergent direction of the light guide plate 1 (the X direction in fig. 1) and a second part perpendicular to the light emergent direction, the length of the rubber frame in the first direction (the direction in which light emitted by the light bar enters the light guide plate and propagates in the light guide plate, refer to the Y direction in fig. 1) thus limits the width of the lower frame.
To solve the above technical problem, the present embodiment provides a backlight module, including:
the light guide plate 1 comprises a light incident surface, a bottom surface and a light emitting surface, wherein the bottom surface and the light emitting surface are adjacent to the light incident surface and are arranged oppositely;
the light bar 3 is arranged on the light incident side of the light guide plate 1, the light bar 3 comprises a flexible circuit board 32 and a plurality of LEDs 31 which are sequentially arranged from the light emergent side to the bottom side, and the LEDs 31 are electrically connected to the flexible circuit board 32;
the plastic frame 2 covers the periphery of the light guide plate 1, the cross section of the plastic frame 2 in the first direction is L-shaped, the plastic frame 2 includes a first portion 21 located on one side of the LEDs 31 far away from the light incident surface, and a second portion 22 connected to one side of the LEDs 31 far away from the flexible circuit board 32, and the first direction is from the light emergent surface of the light guide plate 1 to the bottom surface of the light guide plate 1.
As shown in fig. 2, in this embodiment, the light bar 3 includes a flexible circuit board 32 and a plurality of LEDs 31 sequentially arranged in a direction from the light emitting surface to the bottom surface, that is, the arrangement direction of the LEDs 31 of the light bar 3 and the flexible circuit board 32 is reversed with respect to the backlight module in fig. 1, so that a space is left above the LEDs 31, in this embodiment, the structure of the rubber frame 2 is changed, the cross section of the rubber frame 2 in the first direction (the direction perpendicular to the light emitting surface of the light guide plate) is L-shaped, and the rubber frame includes a first portion 21 located on a side of the LEDs 31 away from the light incident surface, and a second portion 22 connected to a side of the LEDs 31 away from the flexible circuit board 32, and the second portion 22 extends above the LEDs 31, and with respect to the backlight module in fig. 1, in the second direction (after the light emitted by the light bar enters the light guide plate), In the propagation direction within the light guide plate), the length of the glue frame 2 is not reduced, which corresponds to the position of the glue frame 2 moving toward the direction close to the light guide plate 1, and the thickness of the glue frame is increased in the first direction due to the presence of the second portion 22, thereby realizing a narrow bezel while ensuring the supporting strength.
It should be noted that, in order to better illustrate the structure of the rubber frame 2, in this embodiment, the rubber frame 2 is divided into a first portion 21 and a second portion 22, and the first portion 21 and the second portion 22 are divided by a dotted line in fig. 2 and are respectively located on two sides of the dotted line.
It should be noted that, the distance between the first portion 21 and the side of the LED away from the light guide plate 1 may be zero, so as to reduce the width of the frame to the maximum, but in practical applications, in consideration of interference and heat dissipation of the LED, the distance between the first portion 21 and the side of the LED away from the light guide plate 1 is greater than zero but is within a preset value range, which is 0.05mm to 0.15mm, but not limited thereto.
It should be noted that the extending direction of the flexible printed circuit board 32 is perpendicular to the propagation direction of the light emitted by the LEDs 31 in the light guide plate 1 after entering the light guide plate 1, the extending direction of the flexible printed circuit board 32 is perpendicular to the light exit surface of the light guide plate, and the LEDs 31 are arranged on the flexible printed circuit board 32 along the extending direction of the flexible printed circuit board 32.
In this embodiment, the first portion 21 is connected to the flexible circuit board 32 through a first adhesive layer 8, and the second portion 22 and the plurality of LEDs 31 are connected and fixed through a second adhesive layer 9.
Because the plurality of LEDs 31 and the flexible connecting plate of the lamp strip 3 are arranged in the reverse positions, in order to prevent the lamp strip 3 from shaking, the first part 21 of the rubber frame 2 is connected to the flexible circuit board 32 through the first bonding layer 8, and the second part 22 is fixedly connected with the plurality of LEDs 31 through the second bonding layer 9, so that the connection stability of the lamp strip 3 is enhanced.
In this embodiment, the second adhesive layer 9 includes a first adhesive portion extending to a first region of the light emitting surface of the light guide plate 1.
Through the second tie coat 9 with light guide plate 1 is connected, guarantees lamp strip 3 with the stability of the position relation between the light guide plate 1, further reinforcing lamp strip 3's connection stability.
In this embodiment, the first region of the light guide plate 1 close to the LEDs 31 includes a plurality of bright regions and dark regions arranged at intervals, and the first bonding portion is bonded to the dark regions in a zigzag manner.
In this embodiment, a diffusion sheet 61 is disposed on the light exit surface of the light guide plate 1, the diffusion sheet 61 covers the first bonding portion, and a light shielding strip 5 is disposed on an area of the diffusion sheet 61 corresponding to the first bonding portion.
In a specific embodiment of this embodiment, the diffusion sheet 61 is further provided with a prism sheet 62 playing a role of condensing light, and a distance between the prism sheet 62 and the light-shielding bars 5 may be zero, so as to effectively prevent light leakage.
In this embodiment, a prism sheet 62 playing a role of condensing light is disposed on one side of the diffusion sheet 61 away from the light guide plate 1, a light shielding layer 7 is disposed on the prism sheet 62 and the rubber frame 2, the light shielding layer 7 is an annular structure, and the light shielding layer 7 covers an edge area of the prism sheet 62 close to the light bar 3.
The light-shielding layer 7 effectively prevents light leakage.
It should be understood that the light shielding layer 7 is an annular structure, when the prism sheet is a rectangular structure, the light shielding layer 7 includes 4 sides, and fig. 2 is a schematic cross-sectional view in the light exiting direction of the light guide plate, so that the sides of the light shielding layer 7 in the propagation direction (refer to the X direction in fig. 2) of the light guide plate are visible after the light emitted from the light bars enters the light guide plate, that is, the light shielding layer 7 is a portion of the prism sheet 62 on the side away from the light guide plate 1, however, the edge area of the prism sheet 62 is covered by the light shielding layer 7, and the middle area of the prism sheet 62 is not covered by the light shielding layer, and does not affect the exiting of the light emitted from the light guide.
The specific structural form of the light shielding layer 7 may be various, and in this embodiment, the light shielding layer 7 is made of light shielding glue, but not limited thereto.
In this embodiment, the light shielding layer 7 is provided with a spacer for supporting a single layer region of the display panel 10, or the light shielding layer 7 extends from a portion connected to the optical film material 6 to the bezel 2 in an inclined manner along a direction from the bottom surface of the light guide plate 1 to the light exit surface of the light guide plate 1.
The display panel 10 includes a color filter substrate 103 and an array substrate 102 that are disposed opposite to each other, a first polarizer 101 is disposed on a side of the array substrate 102 away from the color filter substrate 103, a second polarizer 104 is disposed on a side of the color filter substrate 103 away from the array substrate 102, the array substrate 102 includes a first region where the color filter substrate 103 is disposed and a second region located on a side of the first region, the second region is a single-layer region of the display panel 10, referring to fig. 5, because the single-layer region of the display panel 10 is relatively thin and fragile, and because of the arrangement of the first polarizer 101, if the light shielding layer 7 is disposed parallel to the light exit surface of the light guide plate, a gap is formed between the light shielding layer 7 and the second region of the array substrate, in the first embodiment of this embodiment, a gasket for supporting the single-layer region of the display panel is disposed on the light shielding layer 7, however, in the present embodiment, the thickness of the rubber frame 2 in the light outgoing direction parallel to the light guide plate is reduced, and the supporting strength of the rubber frame 2 is reduced.
In the second embodiment of this embodiment, a first distance between the light shielding layer 7 and the light guide plate 1 in a direction perpendicular to the light emitting surface of the light guide plate 1 and a first connecting portion of the light shielding layer 7 connected to the plastic frame 2 is greater than a second distance between the light shielding layer 7 and the light guide plate 1 in a direction perpendicular to the light emitting surface of the light guide plate 1 and a second connecting portion of the optical film material 6, referring to fig. 2 and 5, the light shielding layer 7 extends obliquely to the upper side of the rubber frame 2, and the first connecting portion and the second connecting portion form a height difference, compared with the first embodiment, the thickness of the rubber frame 2 in the direction perpendicular to the light emergent surface of the light guide plate 1 is increased, the supporting strength of the rubber frame 2 is effectively ensured, and the second area of the array substrate can be supported without adding a gasket, so that the cost is reduced.
Along the direction from the bottom surface of the light guide plate 1 to the light-emitting surface of the light guide plate 1, the light shielding layer 7 obliquely extends from the part connected to the optical film material 6 to the rubber frame 2, the light shielding layer 7 with an oblique structure plays a role in light shielding, and can support a single-layer area of the display panel 10, so that a gasket is omitted, the cost is saved, and reference is made to fig. 5.
In this embodiment, the bottom surface of the light guide plate 1 is provided with the reflection sheet 20, a graphite connection glue 4 is arranged between the reflection sheet 20 and the flexible circuit board 32, one end of the graphite connection glue 4 is located at one side of the reflection sheet far away from the light guide plate 1 and covers a part of the reflection sheet, and the other end of the graphite connection glue 4 is located at one side of the flexible circuit board 32 far away from the plurality of LEDs 31 and covers a part of the flexible circuit board 32.
As shown in fig. 2, a gap is formed between the reflection sheet 20 and the flexible printed circuit board 32, the graphite connection adhesive 4 is arranged to close the gap between the reflection sheet 20 and the flexible printed circuit board 32, so as to prevent foreign matters from entering, and the graphite connection adhesive 4 covers a part of the flexible printed circuit board 32 to dissipate heat.
The embodiment also provides a display device comprising the backlight module.
The display device further comprises a display panel 10, the display panel 10 comprises a color film substrate 103 and an array substrate 102 which are oppositely arranged, a first polarizer 101 is disposed on a side of the array substrate 102 away from the color filter substrate 103, a second polarizer 104 is disposed on a side of the color filter substrate 103 away from the array substrate 102, the array substrate 102 includes a first region where the color filter substrate 103 is disposed and a second region located on one side of the first region, the light shielding layer 7 extends obliquely from a portion connected to the optical film material 6 to the rubber frame 2 along a direction from the bottom surface of the light guide plate 1 to the light exit surface of the light guide plate 1, the light shielding layer 7 is located at the optical film material 6 and forms a height difference with the part located at the rubber frame 2, and the light shielding layer has a light shielding effect and also has a function of supporting a single layer region of the display panel 10 by utilizing the structure of the light shielding layer.
The display device may be: the display device comprises any product or component with a display function, such as a liquid crystal television, a liquid crystal display, a digital photo frame, a mobile phone, a tablet personal computer and the like, wherein the display device further comprises a flexible circuit board, a printed circuit board and a back plate.
In this embodiment, the arrangement positions of the LEDs 31 of the light bar 3 and the flexible circuit board 32 are reversed with respect to the backlight module shown in fig. 1, so that the conventional assembly process of the backlight module is no longer suitable for the backlight module of this embodiment, and for this reason, this embodiment also provides an assembly method of the backlight module,
the first part is connected to the flexible circuit board through a first bonding layer, the second part is fixedly connected with the LEDs through a second bonding layer, the second bonding layer comprises a first bonding part extending to a first area of the light-emitting surface of the light guide plate,
the method comprises the following steps:
connecting the light bar with the light guide plate through a second bonding layer;
the first part of the rubber frame is connected with the flexible circuit board of the lamp strip through the first bonding layer, and the second part of the rubber frame is connected with the LED of the lamp strip through the second bonding layer.
Specifically, the assembling method of the backlight module comprises the following steps:
the light bar 3 is connected with the light guide plate 1 through a first bonding layer 8, as shown in fig. 3;
the first part 21 of the rubber frame 2 is connected with the flexible circuit board 32 of the light bar 3 through the second bonding layer 9, and the second part 22 of the rubber frame 2 is connected with the LEDs 31 of the light bar 3 through the first bonding layer 8, as shown in fig. 4;
respectively arranging a reflecting sheet on the bottom surface of the light guide plate 1, and arranging an optical film material 6 on the light emergent surface of the light guide plate 1;
a shading layer 7 is arranged between the optical film material 6 and the rubber frame 2;
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A backlight module, comprising:
the light guide plate comprises a light incident surface, a bottom surface and a light emergent surface, wherein the bottom surface and the light emergent surface are adjacent to the light incident surface and are arranged oppositely;
the light bar is arranged on the light incident side of the light guide plate, and comprises a flexible circuit board and a plurality of LEDs which are sequentially arranged from the light emergent surface to the bottom surface, wherein the LEDs are electrically connected to the flexible circuit board;
the glue frame wraps the periphery of the light guide plate, the cross section of the glue frame in the first direction is L-shaped, the glue frame comprises a first part and a second part, the first part is located on one side, away from the light incident surface, of the LEDs, the second part is connected to one side, away from the flexible circuit board, of the LEDs, and the first direction is the direction from the light emergent surface of the light guide plate to the bottom surface of the light guide plate.
2. The backlight module as claimed in claim 1, wherein the first portion is connected to the flexible printed circuit board via a first adhesive layer, and the second portion is connected to the plurality of LEDs via a second adhesive layer.
3. The backlight module as claimed in claim 2, wherein the second adhesive layer comprises a first adhesive portion extending to the first region of the light-emitting surface of the light guide plate.
4. The backlight module as claimed in claim 3, wherein the first region of the light guide plate adjacent to the LEDs comprises a plurality of bright regions and dark regions arranged at intervals, and the first bonding portion is bonded to the dark regions in a zigzag manner.
5. The backlight module as claimed in claim 4, wherein a diffusion sheet is disposed on the light emergent surface of the light guide plate, the diffusion sheet covers the first bonding portion, and a light shielding strip is disposed on the diffusion sheet in a region corresponding to the first bonding portion.
6. The backlight module as claimed in claim 5, wherein a prism sheet for condensing light is disposed on a side of the diffusion sheet away from the light guide plate, and a light shielding layer is disposed on the prism sheet and the plastic frame and covers an edge region of the prism sheet close to the light bar.
7. The backlight module as claimed in claim 6, wherein the light shielding layer has a spacer for supporting a single layer region of the display panel, or the light shielding layer extends obliquely from a portion connected to the prism sheet to the bezel along a direction from the bottom surface of the light guide plate to the light exit surface of the light guide plate.
8. The backlight module as claimed in claim 1, wherein a reflective sheet is disposed on the bottom surface of the light guide plate, a graphite connecting adhesive is disposed between the reflective sheet and the flexible printed circuit board, one end of the graphite connecting adhesive is disposed on a side of the reflective sheet away from the light guide plate and covers a portion of the reflective sheet, and the other end of the graphite connecting adhesive is disposed on a side of the flexible printed circuit board away from the LEDs and covers a portion of the flexible printed circuit board.
9. A display device comprising the backlight module according to any one of claims 1 to 8.
10. A method for assembling a backlight module as claimed in any one of claims 1 to 8, wherein the first portion is connected to the flexible printed circuit board via a first adhesive layer, the second portion is connected to and fixed to the LEDs via a second adhesive layer, the second adhesive layer includes a first adhesive portion extending to the first region of the light-emitting surface of the light guide plate,
the method comprises the following steps:
connecting the light bar with the light guide plate through a second bonding layer;
the first part of the rubber frame is connected with the flexible circuit board of the lamp strip through the first bonding layer, and the second part of the rubber frame is connected with the LED of the lamp strip through the second bonding layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010127836.3A CN111208674B (en) | 2020-02-28 | 2020-02-28 | Backlight module, display device and assembling method of backlight module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010127836.3A CN111208674B (en) | 2020-02-28 | 2020-02-28 | Backlight module, display device and assembling method of backlight module |
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| CN111208674A true CN111208674A (en) | 2020-05-29 |
| CN111208674B CN111208674B (en) | 2022-07-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113721388A (en) * | 2021-08-30 | 2021-11-30 | 京东方科技集团股份有限公司 | Backlight module and display module |
| CN113835268A (en) * | 2021-09-30 | 2021-12-24 | 厦门天马微电子有限公司 | Backlight module and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105301840A (en) * | 2015-11-18 | 2016-02-03 | 武汉华星光电技术有限公司 | Backlight module and liquid crystal display device |
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| CN113721388A (en) * | 2021-08-30 | 2021-11-30 | 京东方科技集团股份有限公司 | Backlight module and display module |
| CN113721388B (en) * | 2021-08-30 | 2023-12-01 | 京东方科技集团股份有限公司 | Backlight module and display module |
| CN113835268A (en) * | 2021-09-30 | 2021-12-24 | 厦门天马微电子有限公司 | Backlight module and display device |
| CN113835268B (en) * | 2021-09-30 | 2023-11-21 | 厦门天马微电子有限公司 | Backlight module and display device |
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| CN111208674B (en) | 2022-07-12 |
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