CN114035371A - Backlight module, preparation process thereof and display device - Google Patents
Backlight module, preparation process thereof and display device Download PDFInfo
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- CN114035371A CN114035371A CN202111188228.4A CN202111188228A CN114035371A CN 114035371 A CN114035371 A CN 114035371A CN 202111188228 A CN202111188228 A CN 202111188228A CN 114035371 A CN114035371 A CN 114035371A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 93
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 238000009792 diffusion process Methods 0.000 claims description 14
- 239000003292 glue Substances 0.000 claims description 13
- 239000000853 adhesive Substances 0.000 claims description 10
- 230000001070 adhesive effect Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 230000000007 visual effect Effects 0.000 abstract description 7
- 230000017525 heat dissipation Effects 0.000 abstract 1
- 239000002390 adhesive tape Substances 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 238000013021 overheating Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- 239000005041 Mylar™ Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- 239000005020 polyethylene terephthalate Substances 0.000 description 1
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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
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
-
- 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
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- 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
- G02F1/133628—Illuminating devices with cooling means
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a backlight module, a preparation process thereof and a display device, wherein the preparation process comprises the following steps: preparing a metal frame, wherein the metal frame comprises a frame body and a sink groove arranged at the tail part of the frame body; install the light guide plate subassembly in the metal frame, the light guide plate subassembly include the light guide plate, with FPC that the light guide plate is connected and locate LED lamp on the FPC, just FPC installs in sink the inslot. The narrow frame is small, the screen occupation ratio is improved, and the visual effect is improved; low cost and high production efficiency: and the heat dissipation performance is good.
Description
Technical Field
The invention relates to the technical field of display devices, in particular to a backlight module, a preparation process of the backlight module and a display device.
Background
The narrow frame technology is a development requirement of a higher level provided after the technology of the liquid crystal display is basically developed, and the narrow frame means that a larger visible area can be obtained on a display surface with the same size and the same resolution.
With the continuous development of LCD product technology, the liquid crystal display market competition is becoming more and more intense, wherein, the liquid crystal display device has a narrow frame, can effectively improve the high screen occupation ratio, improves the visual effect, and especially can follow the large screen trend of the mobile display product in the existing market.
For example, the narrow bezel of the backlight module commonly used in the mobile phone has been limited, but the narrow bezel of the mobile phone still has a defect of being too large compared with the OLED screen.
Therefore, the prior art has yet to be improved.
Disclosure of Invention
The inventor finds that the narrow frame of the mobile phone in the prior art is too large, so that the screen occupation ratio is reduced, and the visual effect is influenced.
The present invention aims to alleviate or solve at least to some extent at least one of the above mentioned problems. The invention provides a preparation process of a backlight module, which comprises the following steps:
preparing a metal frame, wherein the metal frame comprises a frame body and a sink groove arranged at the tail part of the frame body;
install the light guide plate subassembly in the metal frame, the light guide plate subassembly include the light guide plate, with FPC that the light guide plate is connected and locate LED lamp on the FPC, just FPC installs in sink the inslot.
In one embodiment, the installing of the light guide plate assembly in the metal frame includes a light guide plate, an FPC connected to the light guide plate, and an LED lamp provided on the FPC, and the installing of the FPC in the sinking groove includes:
arranging an LED lamp on an FPC to form an FPC lamp strip;
and connecting the FPC lamp strip with a light guide plate to form a light guide plate assembly.
In one embodiment, the step of connecting the FPC light bar with the light guide plate to form the light guide plate assembly includes:
and aligning the light outlet of the LED lamp with the light inlet of the light guide plate.
In one embodiment, the step of installing a light guide plate assembly in the metal frame, the light guide plate assembly including a light guide plate, an FPC connected to the light guide plate, and an LED lamp provided on the FPC, and the step of installing the FPC in the sunken groove further includes:
inserting the FPC in the light guide plate assembly into the sinking groove in an inclined mode;
and adjusting one end of the light guide plate assembly, which is far away from the FPC, so that the light guide plate assembly is embedded into the metal frame.
In one embodiment, the step of installing a light guide plate assembly in the metal frame, where the light guide plate assembly includes a light guide plate, an FPC connected to the light guide plate, and an LED lamp provided on the FPC, and the step of installing the FPC in the sinking groove further includes:
and installing a reflector plate in the metal frame.
In one embodiment, the method further comprises the steps of:
attaching a diffusion film to the top surface of the light guide plate;
attaching a lower brightness enhancement film on the top surface of the diffusion film;
attaching a brightness enhancement film on the top surface of the lower brightness enhancement film to form a backlight source;
and attaching shading glue to the light-emitting side of the backlight source.
In one embodiment, the metal frame further comprises a U-shaped groove arranged at the tail of the frame body, and the top of the U-shaped groove is attached to the shading glue.
In one embodiment, a wrapping single-sided adhesive tape is arranged at the connecting position of the U-shaped groove and the shading adhesive.
The backlight module is prepared by adopting the preparation process of the backlight module.
A display device comprises the backlight module.
The invention has the beneficial effects that: the invention discloses a backlight module, a preparation process thereof and a display device, wherein the preparation process comprises the following steps: preparing a metal frame, wherein the metal frame comprises a frame body and a sink groove arranged at the tail part of the frame body; install the light guide plate subassembly in the metal frame, the light guide plate subassembly include the light guide plate, with FPC that the light guide plate is connected and locate LED lamp on the FPC, just FPC installs in sink the inslot. The invention has the beneficial effects that:
1. the narrow frame is little: the backlight module provided by the invention has the advantages that the narrow frame can be greatly reduced because a rubber frame is not required to be arranged, so that a larger screen area can be covered by the display screen, the screen occupation ratio is improved, and the visual effect is improved;
2. low cost and high production efficiency: a rubber frame is not required to be mounted, so that the cost can be saved, the mounting time can be saved, and the production efficiency can be improved;
3. the heat dispersion is good: the heat on the FPC is not required to be transferred through the rubber frame, the FPC is arranged on the metal frame, the metal frame can directly and quickly transfer the heat on the FPC, and a transfer path of the heat on the FPC and the LED lamp can be optimized, so that the purpose of reducing the temperature of the backlight module is achieved, and the problem of overheating of the backlight module can be effectively solved.
Drawings
Fig. 1 is a schematic flow chart of a process for manufacturing a backlight module according to the present invention.
Fig. 2 is a schematic structural diagram of a backlight module provided by the invention.
Fig. 3 is a schematic diagram of the positions of LED lamps in the backlight module provided by the present invention.
Fig. 4 is a schematic view illustrating an assembly of the light guide plate module and the metal frame according to the present invention.
Fig. 5 is a schematic view of a mechanism of the FPC light bar provided by the present invention.
Fig. 6 is an exploded view of the light guide plate module according to the present invention.
Fig. 7 is an exploded view of the backlight module according to the present invention.
Fig. 8 is an enlarged view of a portion a in fig. 7.
Fig. 9 is an enlarged view of a portion B in fig. 7.
FIG. 10 is a diagram illustrating an effect of the backlight module according to the present invention.
Reference numerals:
100. a metal frame; 200. a reflective sheet; 300. a light guide plate module; 400. a diffusion membrane; 500. a lower brightness enhancement film; 600. an upper brightness enhancement film; 700a, a light shielding glue; 700b, wrapping single-sided tape; 700c, double-sided adhesive tape;
110. a frame body; 120. sinking a groove; 121. an inclined surface; 130. a U-shaped groove; 131. an opening;
310. a light guide plate; 320. an LED lamp; 330. FPC; 320a, an FPC light bar;
331. an FPC main body; 332. a connecting portion; 410. diffusing the black stripes;
H. the distance between the visible area and the frame at the tail part of the metal frame (narrow frame value); h1, the distance between the LED lamp and the frame at the tail part of the metal frame; h2, distance of LED lamp from visual zone.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Based on the problems in the prior art, the embodiment provides a process for manufacturing a backlight module, as shown in fig. 1, the process includes the following steps:
s100, preparing a metal frame, wherein the metal frame comprises a frame body and a sink groove arranged at the tail of the frame body.
Specifically, as shown in fig. 2, the metal frame 100 includes a frame body 110 and a sink 120 disposed at a tail portion of the frame body 110, and the sink 120 is formed by stamping the metal frame 100. Wherein, the depth of the sink 120 is preferably 0.08-0.2 mm. The provision of the sink groove 120 enables the metal frame 100 to have an inner receiving space for mounting a portion of the backlight assembly, and the provision of the sink groove 120 enables the structural strength of the metal frame 100 to be enhanced without excessively increasing the thickness of the metal frame 100 by the depth of the sink groove 120.
S200 install the light guide plate subassembly in the metal frame, the light guide plate subassembly include the light guide plate, with FPC that the light guide plate is connected and locate LED lamp on the FPC, just FPC installs sink the inslot.
Specifically, as shown in fig. 2 and 4, the light guide plate assembly 300 includes a light guide plate 310, an FPC330 and an LED lamp 320, the light guide plate 310 in the light guide plate assembly 300 is attached to the metal frame, wherein the FPC330 is fixed in the sinking groove 120, for example, the FPC330 is fixed in the sinking groove 120 through a double-sided tape 700c, the FPC330 is used for connecting the LED lamp 320 with a main board of the backlight module, and the LED lamp 320 is used for providing a light source of the backlight module.
The working principle of the preparation process of the backlight module provided by the embodiment is as follows:
among the prior art, on the frame was glued in the FPC installation, it establishes in the metal frame to glue the frame, wherein, the metal frame, glue the frame, LED lamp and light guide plate distribute the setting in proper order, and FPC is located glues the frame, FPC occupies certain width, and then the distance H2 of LED lamp and visible region has been increased, FPC need walk around LED lamp and mainboard connection, can increase the distance H1 of LED lamp and metal frame afterbody frame to a certain extent, and it is located between LED lamp and the metal frame to glue the frame, the more great distance H1 of increase LED lamp and metal frame afterbody frame, therefore, the distance H greatly increased that leads to visible region and metal frame afterbody frame.
Generally, in the prior art, the width occupied by the rubber frame is 0.6-1.5mm, if the rubber frame is too narrow, a light leakage phenomenon occurs, so that the numerical value H of the narrow frame is increased due to the rubber frame, the distance H2 between the LED lamp and the visible region is 2.2-5.5mm, and the light leakage problem occurs due to the fact that the distance between the LED lamp and the visible region is small; the distance H between the visible area and the frame at the tail part of the metal frame is 4.5-6.5 mm.
In the embodiment, the LED lamp, the FPC and the light guide plate are assembled into a whole to form the light guide plate assembly, the position relation of the LED lamp, the FPC and the light guide plate is not considered at first, the light guide plate assembly is taken as a whole, and then the assembly is carried out, so that the assembly gap of the LED can be greatly reduced, the distance H between a visible area and a tail frame of the metal frame can be reduced, namely the value H of a narrow frame is reduced;
in addition, in this embodiment, the FPC is fixed in the sinking groove of the metal frame, and a glue frame is not required to be mounted, so that the distance H1 between the LED lamp and the frame at the rear end of the metal frame is greatly reduced, and the FPC is located in the sinking groove and is not required to be connected with the main board after being wound around the LED lamp, so that the distance H1 between the LED lamp and the frame at the rear end of the metal frame is reduced to a certain extent, and the distance H2 between the LED lamp and the visible area is reduced when the FPC is located at the bottom of the light guide plate, so that the distance H (shown in fig. 10) between the visible area and the frame at the rear end of the metal frame can be greatly reduced, that is, the narrow-frame value H can be greatly reduced.
In this embodiment, as shown in fig. 3, the distance H1 between the LED lamp and the frame at the rear of the metal frame is 0.2-0.7 mm; the distance H2 between the LED lamp and the visible region is 1.0-1.5mm, and the distance H between the visible region and the frame at the tail part of the metal frame is 1.8-3.0 mm.
In the embodiment, by optimizing the preparation process of the backlight module, the distance H1 between the LED lamp and the tail frame of the metal frame can be 0.2 mm; the distance H2 between the LED lamp and the visible region is 1.0mm, and the distance H between the visible region and the frame at the tail of the metal frame is 1.8mm, i.e., the value H of the narrow frame in this embodiment may be 1.8 mm. Therefore, the distance H between the visible area and the frame at the tail part of the metal frame can be greatly reduced, namely the numerical value H of the narrow frame can be greatly reduced, and the screen occupation ratio is improved.
The preparation process of the backlight module provided by the embodiment has the beneficial effects that:
1. the narrow frame is little: the backlight module in the embodiment can greatly reduce narrow frames due to no need of arranging a rubber frame, so that a display screen can cover a larger screen area, the screen occupation ratio is improved, and the visual effect is improved;
2. low cost and high production efficiency: a rubber frame is not required to be mounted, so that the cost can be saved, the mounting time can be saved, and the production efficiency can be improved;
3. the heat dispersion is good: the heat on the FPC does not need to be transmitted through the rubber frame, the FPC is installed on the metal frame in the embodiment, the metal frame can directly transmit the heat on the FPC fast, and a heat transmission path on the FPC and the LED lamp can be optimized, so that the purpose of reducing the temperature of the backlight module is achieved, and the problem of overheating of the backlight module can be effectively solved.
In one embodiment, step S200 includes:
s210, arranging an LED lamp on an FPC to form an FPC lamp strip;
and S220, connecting the FPC light bar with the light guide plate to form a light guide plate assembly.
Specifically, as shown in fig. 5 and fig. 6, the light guide plate assembly 300 in this embodiment includes a light guide plate 310, an FPC330 connected to the light guide plate 310, and an LED lamp 320 disposed on the FPC330, the FPC330 is connected to the LED lamp 330 to form an FPC light bar 300a, the FPC light bar 300a is assembled with the light guide plate 310 to form the light guide plate assembly 300, and then the light guide plate assembly 300 is integrally mounted in the metal frame 100, so as to implement a module design and effectively improve assembly efficiency, and the light guide plate assembly 300 can effectively reduce an assembly gap between the LED lamp 320 and the metal frame 100, and can reduce a distance H1 between the LED lamp and a rear frame of the metal frame.
For example, as shown in fig. 2, the LED lamps 320 are first mounted on the FPC330 to form the FPC light bar 300a, and then the FPC330 and the light guide plate 310 are fixedly connected by the double-sided adhesive tape 700c, so that the LED lamps 320 and the light guide plate 310 are arranged in parallel.
In one embodiment, step S220 includes:
and aligning the light outlet of the LED lamp with the light inlet of the light guide plate.
Specifically, in conjunction with fig. 2, the LED lamp 320 provides a light source of the backlight module, and the light guide plate 310 converts a linear light source of the LED lamp 320 into a surface light source. The light outlet of the LED lamp 320 is flush with the light inlet of the light guide plate 310, so that the LED light of the LED lamp 320 can be guided into the light guide plate 310.
In one embodiment, step S200 further comprises:
s230, inserting the FPC in the light guide plate assembly into the sinking groove in an inclined mode;
s240, adjusting one end, far away from the FPC, of the light guide plate assembly to enable the light guide plate assembly to be embedded into the metal frame.
Specifically, as shown in fig. 4, in the present embodiment, after the light guide plate assembly 300 is formed, that is, after the FPC light bar 300a is assembled on the light guide plate 310, the FPC330 of the light guide plate assembly 300 is obliquely inserted into the sinking groove 120, and then one end of the light guide plate assembly 300 away from the FPC330 is adjusted, so that the light guide plate assembly 300 is embedded into the metal frame, which can ensure that the FPC330 smoothly enters the sinking groove, and can improve the assembly efficiency.
As shown in fig. 2 and 3, in order to avoid stress concentration in the sinking groove 120 and facilitate processing, the insertion end of the sinking groove 120 is provided with an inclined surface 121, that is, the insertion end 121 of the sinking groove 120 is located on the side of the sinking groove 120 away from the frame at the tail of the metal frame.
In one embodiment, step S200 further includes, before:
and installing a reflector plate in the metal frame.
Specifically, referring to fig. 7, in the present embodiment, the reflective sheet 200 is installed in the metal frame 100, wherein most of the reflective sheet 200 is located at one end of the metal frame 100 away from the sinking groove 120, and a section of the reflective sheet 200 is located on the sinking groove 120, wherein one end of the reflective sheet 200 close to the sinking groove 120 is fixedly connected to the sinking groove 120 through the double-sided tape 700 c. The reflective sheet 200 is disposed at the bottom of the light guide plate 310, and is used for reflecting light emitted from the light guide plate 310 to one side of the bottom plate of the metal frame 100, so that the light can be recycled, and the light utilization rate can be improved.
In one embodiment, the preparation process further comprises the steps of:
attaching a diffusion film to the top surface of the light guide plate;
attaching a lower brightness enhancement film on the top surface of the diffusion film;
attaching a brightness enhancement film on the top surface of the lower brightness enhancement film to form a backlight source;
and attaching shading glue to the light-emitting side of the backlight source.
Specifically, as shown in fig. 7, in this embodiment, a backlight is formed by attaching a diffusion film 400, a lower brightness enhancement film 500, and an upper brightness enhancement film 600 to the top surface of a light guide plate 310, the top surface of the diffusion film 400, and the top surface of the lower brightness enhancement film 500 in this order, and a light shielding adhesive 700a is attached to the light exit side of the backlight. The diffusion film 400 makes the LED light generate many refraction, reflection and scattering phenomena, and can correct the light to form a uniform surface light source to achieve the effect of optical diffusion. The upper and lower brightness enhancement films 600 and 500 are used for backlight brightness; the light shielding adhesive 700a has excellent shielding and insulating properties, and is used for fixing the backlight source to the LCD, wherein a diffusion black stripe 410 (shown in fig. 2) is disposed at one end of the diffusion film 400 close to the LED lamp, for shielding the upward light of the LED lamp.
In one embodiment, the metal frame further comprises a U-shaped groove arranged at the tail of the frame body, and the top of the U-shaped groove is attached to the shading glue.
Specifically, as shown in fig. 8, the U-shaped groove 130 at the tail of the metal frame 100 includes a first plate perpendicular to the bottom plate of the metal frame 100 and a second plate perpendicular to the first plate, wherein the second plate has a certain width, so that the structural strength of the metal frame 100 can be enhanced, the attachment width of the light shielding adhesive 700a to the metal frame 100 can be increased, and the bonding strength between the light shielding adhesive 700a and the metal frame 100 can be effectively enhanced.
Wherein, seted up opening 131 on U type groove 130, FPC330 includes FPC main part 331 and connecting portion 332, and this opening 131 is used for installing FPC 330's connecting portion 332, connecting portion 332 with backlight unit's mainboard connection, can greatly make things convenient for backlight unit's equipment, can avoid connecting portion 332 to walk around the afterbody frame of metal frame 100 simultaneously, avoid increasing the distance of LED lamp and the afterbody frame of metal frame 100.
In one embodiment, a wrapping single-sided adhesive tape is arranged at the connecting position of the U-shaped groove and the shading adhesive.
Specifically, referring to fig. 9, the edge-covering single-sided tape 700b is used to connect the light-shielding adhesive 700a and the metal frame 100, one end of the edge-covering single-sided tape 700b covers the light-shielding adhesive 700a on the front surface of the backlight module, and the other end of the edge-covering single-sided tape 700b covers the bottom plate of the metal frame 100, and the edge-covering single-sided tape 700b can enhance the bonding strength between the light-shielding adhesive 700a and the U-shaped groove 130. For example, the edge-covered single-sided tape 700b is made of mylar, which is black PET and has a thickness of 0.03 mm.
Example 1
S1, automatically feeding a metal frame;
specifically, the metal frame 100 includes a frame body 110, a sink 120, and a U-shaped groove 130, and the sink 120 and the U-shaped groove 130 are processed on the metal frame 100 before the metal frame 100 is loaded.
S2, attaching a reflector plate;
s3, obliquely inserting the light guide plate assembly into the metal frame;
specifically, the suction block sucks the light emitting surface of the light guide plate 310, rotates by 15 degrees, inserts the FPC light bar 300a into the corresponding sinking groove 120 in the metal frame 100 in an inclined manner, and adjusts one end of the light guide plate 310 away from the FPC light bar 300a to be placed in the metal frame 100.
S4, sticking a diffusion film;
s5, attaching a brightness enhancement film;
s6, attaching a brightness enhancement film;
s7, pasting shading glue;
s8, attaching a single-sided tape of the edge covering.
In this embodiment, by optimizing the manufacturing process of the backlight module, the distance H1 between the LED lamp and the rear frame of the metal frame is 0.2-0.7mm, the distance H2 between the LED lamp and the visible region is 1.0-1.5mm, and the distance H between the visible region and the rear frame of the metal frame is 1.8-3.0 mm. Therefore, the distance H between the visible area and the frame at the tail part of the metal frame can be greatly reduced, namely the numerical value H of the narrow frame can be greatly reduced, and the screen occupation ratio is improved.
The embodiment of the invention provides a backlight module, wherein the backlight module is prepared by adopting the preparation process of the backlight module.
The embodiment of the invention provides a display device, wherein the display device comprises the backlight module.
In summary, the present invention provides a backlight module, a manufacturing process thereof and a display device, wherein the manufacturing process includes the steps of: preparing a metal frame, wherein the metal frame comprises a frame body and a sink groove arranged at the tail part of the frame body; install the light guide plate subassembly in the metal frame, the light guide plate subassembly include the light guide plate, with FPC that the light guide plate is connected and locate LED lamp on the FPC, just FPC installs in sink the inslot. According to the backlight module, the narrow frame can be greatly reduced because a rubber frame is not required to be arranged, so that a display screen can cover a larger screen area, the screen occupation ratio is improved, and the visual effect is improved; according to the invention, a rubber frame is not required to be mounted, so that the cost can be saved, the mounting time can be saved, and the production efficiency can be improved; the heat on the FPC is not required to be transferred through the rubber frame, the FPC is arranged on the metal frame, the metal frame can directly and quickly transfer the heat on the FPC, and a transfer path of the heat on the FPC and the LED lamp can be optimized, so that the purpose of reducing the temperature of the backlight module is achieved, and the problem of overheating of the backlight module can be effectively solved.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (10)
1. A preparation process of a backlight module is characterized by comprising the following steps:
preparing a metal frame, wherein the metal frame comprises a frame body and a sink groove arranged at the tail part of the frame body;
install the light guide plate subassembly in the metal frame, the light guide plate subassembly include the light guide plate, with FPC that the light guide plate is connected and locate LED lamp on the FPC, just FPC installs in sink the inslot.
2. The process of claim 1, wherein a light guide plate assembly is mounted in the metal frame, the light guide plate assembly comprises a light guide plate, an FPC connected to the light guide plate, and an LED lamp disposed on the FPC, and the step of mounting the FPC in the sinking groove comprises:
arranging an LED lamp on an FPC to form an FPC lamp strip;
and connecting the FPC lamp strip with a light guide plate to form a light guide plate assembly.
3. The process of claim 2, wherein the step of connecting the FPC light bar with a light guide plate to form a light guide plate assembly comprises:
and aligning the light outlet of the LED lamp with the light inlet of the light guide plate.
4. The process of claim 1, wherein a light guide plate assembly is mounted in the metal frame, the light guide plate assembly comprises a light guide plate, an FPC connected to the light guide plate, and an LED lamp disposed on the FPC, and the step of mounting the FPC in the sinking groove further comprises:
inserting the FPC in the light guide plate assembly into the sinking groove in an inclined mode;
and adjusting one end of the light guide plate assembly, which is far away from the FPC, so that the light guide plate assembly is embedded into the metal frame.
5. The process for preparing a backlight module according to claim 1, wherein a light guide plate assembly is mounted in the metal frame, the light guide plate assembly comprises a light guide plate, an FPC connected to the light guide plate, and an LED lamp disposed on the FPC, and the step of mounting the FPC in the sunken groove further comprises:
and installing a reflector plate in the metal frame.
6. The process of claim 1, further comprising the steps of:
attaching a diffusion film to the top surface of the light guide plate;
attaching a lower brightness enhancement film on the top surface of the diffusion film;
attaching a brightness enhancement film on the top surface of the lower brightness enhancement film to form a backlight source;
and attaching shading glue to the light-emitting side of the backlight source.
7. The process for preparing a backlight module according to claim 1, wherein the metal frame further comprises a U-shaped groove formed in the tail of the frame body, and the top of the U-shaped groove is attached to the light-shielding adhesive.
8. The process for preparing a backlight module according to claim 7, wherein a wrapping single-sided tape is arranged at the connection position of the U-shaped groove and the light-shielding glue.
9. A backlight module prepared by the process for preparing a backlight module according to any one of claims 1 to 9.
10. A display device, characterized in that the display device comprises a backlight module according to claim 9.
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| CN202111188228.4A CN114035371A (en) | 2021-10-12 | 2021-10-12 | Backlight module, preparation process thereof and display device |
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Application publication date: 20220211 |