CN107831565A - The applying method of light guide plate and reflector plate, backlight module and display device - Google Patents
The applying method of light guide plate and reflector plate, backlight module and display device Download PDFInfo
- Publication number
- CN107831565A CN107831565A CN201711366731.8A CN201711366731A CN107831565A CN 107831565 A CN107831565 A CN 107831565A CN 201711366731 A CN201711366731 A CN 201711366731A CN 107831565 A CN107831565 A CN 107831565A
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- China
- Prior art keywords
- light guide
- guide plate
- plate
- reflector plate
- laser
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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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention provides a kind of light guide plate and the applying method of reflector plate, methods described includes：The light guide plate and reflector plate stacking；The reflector plate and the light guide plate are welded using laser, the solder joint as the light guide plate mesh point is formed at the contact surface of the reflector plate and the light guide plate.Reflector plate and light guide plate fitting are fixed together by the above method using laser welding mode, improve light source utilization rate and reliability, while simplify manufacturing process, improve production efficiency.
Description
Technical field
The application is related to display technology field, more particularly to the applying method of a kind of light guide plate and reflector plate, backlight module
And display device.
Background technology
LCD TV ultrathin design at present is into main flow, liquid crystal display device as shown in Figure 1, liquid crystal display device bag
Liquid crystal panel 1 and side entrance back module 2 are included, liquid crystal panel 1 and the exiting surface of side entrance back module 2 are oppositely arranged, and side enters
Formula backlight module 2 includes LED light bar 21, reflector plate 22, glass light guide plate 23 and blooming piece 24, and reflector plate 22 is led positioned at glass
The lower section of tabula rasa 23, blooming piece 24 are located at the exiting surface of glass light guide plate 23, and blooming piece 24 is mutually right with liquid crystal panel 1
Put.In order to realize ultrathin design, generally use glass light guide plate 23 is bonded reflector plate 22 and forms integral structure to support entirely
The intensity of module screen, it is ultra-thin to realize the mode of back plate thickness or cancellation backboard is thinned.In order to realize fitting, in the prior art
Take between glass light guide plate 23 and reflector plate 23 using fitting glue 25.
It is between glass light guide plate and reflector plate to use full laminating type more, as shown in Fig. 2 fitting glue 25 is paved with and entirely led
The bottom surface of tabula rasa 23 is used to reflector plate 22 and light guide plate 23 being bonded together.Such a mode is needed first to leaded light in actual production
The bottom surface printing net-point 231 ' of plate 23, drying site 231 ', then attach the reflector plate 22 for being made ready beforehand for glue layer, now again
Glue is covered on light guide plate printing net-point 231 '.This laminating type includes multiple steps, and manufacturing process is more complicated, and
After the light that LED is sent enters glass light guide plate 23, because the fitting refractive index of glue 25 is high, some light is caused not formed
It is totally reflected and enters glue layer, because glue has certain light absorptive, the light part for entering glue layer is absorbed, drop
The low utilization rate of backlight.Meanwhile the adhesive contained in fitting glue 25 can volatilize after long-term use or embrittlement, exists
Reliability hidden danger.
The content of the invention
In view of above-mentioned the deficiencies in the prior art, the invention provides the applying method of a kind of light guide plate and reflector plate, backlight
Module and display device, simplify the bonding process of light guide plate and reflector plate, improve light source utilization rate and the reliability of backlight module.
On the one hand, the invention provides a kind of light guide plate and the applying method of reflector plate, it is characterised in that methods described bag
Include：The light guide plate and reflector plate stacking；The reflector plate and the light guide plate are welded using laser, described
The solder joint as the light guide plate mesh point is formed at the contact surface of reflector plate and the light guide plate.
On the other hand, present invention also offers the backlight module of the light guide plate formed including above-mentioned applying method.
In addition, present invention also offers the display device for including above-mentioned backlight module.
The applying method of light guide plate and reflector plate provided by the invention, it is played reflector plate and guide-lighting plate weld using laser
Come, the solder joint as light guide plate mesh point is formed at the contact surface of reflector plate and light guide plate.The above method utilizes laser welding side
Reflector plate and light guide plate fitting are fixed together by formula, avoid glue used in traditional laminating type in the absorption and glue of light
The embrittlement of adhesive, light source utilization rate and reliability are improved, meanwhile, weld site of the solder joint directly as light guide plate of formation
Use, multi-step process, the solution of the present invention such as be bonded again compared to first printing net-point in the prior art is just completed by a step
The making of light guide plate mesh point and light guide plate are bonded with sheet emitting, are simplified manufacturing process, are improved production efficiency.
Brief description of the drawings
Fig. 1 is the structural representation of the liquid crystal display device of prior art；
Fig. 2 is the bonding structure schematic diagram of light guide plate and reflector plate in the prior art；
Fig. 3 is the implementation schematic diagram of the applying method of embodiment one；
Fig. 4 is the structural representation for the partial liquid crystal display device that the applying method of embodiment one is formed；
Fig. 5, which is that light is distributed in the partial liquid crystal display device that the applying method of embodiment one is formed, to be intended to；
Fig. 6 is the distribution schematic diagram of solder joint on light guide plate；
Fig. 7 is the fitting process schematic of the lower light guide plate of pressure effect and reflector plate.
Embodiment
It should be understood that embodiment described herein is used only for explaining the present invention, it is not used to limit this hair
It is bright.
Manufacturing process is complicated, backlight source utilization rate is low in order to solve existing for existing light guide plate and reflector plate laminating type and
The technical problem of poor reliability, the present invention proposes a kind of applying method of light guide plate and reflector plate, by light guide plate and reflector plate
Stacking, is welded reflector plate and light guide plate using laser, is formed at the contact surface of reflector plate and light guide plate as guide-lighting
The solder joint of expanded metals point.The method of the present invention improves light source utilization rate and reliability, simplifies manufacturing process, improves production effect
Rate.The light guide plate of the application offer and the applying method of reflector plate are provided below in conjunction with the accompanying drawings.
It should be noted that the implementation for being welded reflector plate and light guide plate using laser in the present invention is optional
Select by carrying out laser irradiation in light guide plate side, and then laser is entered at the contact surface of reflector plate and light guide plate, also may be selected
Laser irradiation is carried out from reflector plate side, is not limited herein.Illustrated below exemplified by carrying out laser irradiation in light guide plate side.
Embodiment one
Referring to Fig. 3, the schematic diagram of the applying method of a kind of light guide plate and reflector plate of the offer of the embodiment of the present application one is shown.Such as
Shown in Fig. 3, light guide plate 23 and reflector plate 22 are laminated, and light guide plate 23 is located on reflector plate 22, and laser enters through light guide plate 23
Reflector plate 22 is with the contact surface of light guide plate 23, the reflector plate material absorption laser at contact surface, changing into heat energy by luminous energy, making
The rise of reflector plate material temperature is obtained, heat is also communicated to the surface of light guide plate, causes to melt at the contact surface of reflector plate and light guide plate
Melt or melt, weld zone, i.e. solder joint 231 are formed, as shown in figure 4, reflector plate and light guide plate are welded together.In laser welding
During, by the position for controlling Laser Focusing focus so that laser beam passes through light guide plate, and the Voice segment of most high-density is being led
At the contact surface of tabula rasa and reflector plate, melted at the contact surface of reflector plate and light guide plate, so as to realize welding.Laser solder joint due to
Total reflection of the light in light guide plate is destroyed, therefore laser solder joint uses directly as light guide plate mesh point, as shown in Figure 5.Because of weldering
Point uses as the site of light guide plate, therefore selects to be welded according to the distribution of the dot density of setting, so as to management and control module
Optical profile.Dot density distribution can use network point distribution form commonly used in the art, and preferably solder joint site arrangement is according to solder joint
Diameter is equal, the solder joint arrangement of spot pitch change, as shown in Figure 6.Spot size stimulated light focal beam spot size determines, adjustable
Whole is 0.05mm-1mm, suitable with existing light guide plate printing net-point.
It should be noted that in order to ensure that light guide plate and reflector plate fitting are fixed together, the energy of laser beam at least makes
Obtain at least one fusing at the contact surface of reflector plate and light guide plate.The material of light guide plate is glass in the embodiment of the present invention, instead
The material for penetrating piece is PET, and the energy of laser beam used can at least reach the fusion temperature of reflector plate, such as 250 degree.In order to ensure to weld
Effect is connect, the preferably energy of laser beam can reach the glass transition temperature of glass used in light guide plate, and glass transition temperature is 600 degree
Left and right.In addition, for the light guide plate of PMMA materials, applying method of the invention is equally applicable.
In order to ensure that laser energy meets use demand, the present invention selects（Nd3+：YAG）Laser and diode laser
Device, laser used are the femtosecond pulse that the pulse width in short wavelength infrared area is 800-900fs, can within the burst length
To melt glass and PET, pulse energy is about tens μ J.
When carrying out laser welding, if light guide plate and reflector plate are in the free state of stacking, due to light guide plate and reflection
The reason for piece flatness, more or less certain interval all be present between the two, be so unable to reach predetermined welding effect.It is therefore optional
Ground, in order to ensure that light guide plate and reflector plate fitting are tight, before reflector plate and light guide plate is welded using laser, one
The light guide plate and reflector plate of stacking are extruded under constant-pressure, make both be in close contact, beneficial to laser spot seek level really and
Each welding site same effect.Further, in laser beam welding, reflector plate and light guide plate are also at extruding shape
State, pressure are acted on so that being welded between reflector plate and light guide plate more firm.As shown in Figure 7, pressure can be from reflector plate and leading
The side of tabula rasa two applies simultaneously, makes both simultaneously to middle close, only can also apply from a side, and the opposing party creates antagonism power, so as to
So that both are pressed together.The selection of pressure size can make reasonable selection according to the actual requirements, be pressed in the embodiment of the present invention
The optional scope of power is 500g-10kg, can be in close contact reflector plate and light guide plate, without damage light guide plate and reflection
Piece, while also avoid occurring impression between light guide plate and reflector plate.
Embodiment two
On the basis of the applying method of embodiment one, the embodiment of the present invention provides the fitting side of second of reflector plate and light guide plate
Method.To improve speed of welding and welding effect, applying method is additionally included in before carrying out laser welding, and precoating absorbs the painting of laser
The step of material, make to be pre-coated with the coating for absorbing laser at the reflector plate of stacking and the contact surface of light guide plate.A more step, precoating applies
The step of material, occurs before being laminated to light guide plate and reflector plate.Precoating can by the way that coating is coated in into reflector plate surface,
Then the reflector plate surface with coating is contacted with light guide plate；Also coating first can be coated then by reflector plate in light guide plate surface
Covering is thereon.When laser irradiates, coating absorbs heat energy under the irradiation of laser and generates heat rapidly and melt the material of adjacent layer, profit
Reflector plate and light guide plate are fixed together with melt portions, realize welding.Because site of the solder joint directly as light guide plate uses,
Therefore preferred coatings are precoated according to the distribution of the dot density of setting, are set at pre-formed solder joint.
Coating in the embodiment of the present invention includes SiO2, TiO2, Fe3O4, MnO2, at least one of CuO, CdTe are above-mentioned
Material is nano material, there is good absorbability to laser, is generated heat rapidly after absorbing laser energy.
The embodiment of the present invention additionally provides a kind of backlight module, and the backlight module includes method provided in an embodiment of the present invention
The fit type light guide plate of formation.Certainly, in addition, backlight module may also include miscellaneous part, such as：For supporting or fixing
The glue frame of diaphragm, blooming piece etc., the prior art that above-mentioned part is well known to those skilled in the art, the present invention is herein no longer
Repeat.
In actual use, because reflecting layer 22 is affixed on light guide plate 23, both form integral structure, thus can support whole
The intensity of individual module screen, back plate thickness can so be thinned or cancel backboard, realize the ultrathin design of display device.
In addition, present invention also offers a kind of liquid crystal display device, it includes liquid crystal panel and the backlight module of the present invention,
The exiting surface and liquid crystal panel of backlight module are mutually opposing.Thus the reliability of the display device made is higher, light source utilization rate
It is higher, also more conducively ultrathin.
It the above is only the embodiment of the present invention, it is noted that come for those skilled in the art
Say, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (10)
1. the applying method of a kind of light guide plate and reflector plate, it is characterised in that methods described includes：
The light guide plate and reflector plate stacking；
The reflector plate and the light guide plate are welded using laser, in the reflector plate and the contact surface of the light guide plate
Place forms the solder joint as the light guide plate mesh point.
2. the method as described in claim 1, it is characterised in that：It is described to be welded the reflector plate and the light guide plate using laser
Pick up to include：Laser beam enters the light guide plate with the contact surface of the reflector plate, making described through the light guide plate
Reflector plate and/or light guide plate melting or fusing at contact surface.
3. method as claimed in claim 1 or 2, it is characterised in that：By the reflector plate and described led using laser described
Among tabula rasa welds process, the reflector plate and the light guide plate of the stacking are extruded under a certain pressure.
4. method as claimed in claim 1 or 2, it is characterised in that：Laser is being utilized by the reflector plate and the light guide plate
Before welding, precoating absorbs the coating of the laser, makes reflector plate contact with the light guide plate of the stacking
It is pre-coated with absorbing the coating of the laser at face.
5. method as claimed in claim 4, it is characterised in that：The coating includes SiO2, TiO2, Fe3O4, MnO2, CuO,
At least one of CdTe.
6. the method as described in claim 1, it is characterised in that：The material of the light guide plate is glass or PMMA, the reflection
The material of piece is PET.
7. the method as described in claim 1, it is characterised in that：The laser is that the pulse width in short wavelength infrared area is 800-
900fs femtosecond pulse.
8. the method as described in claim 1, it is characterised in that：A diameter of 0.05mm-1mm of the solder joint.
A kind of 9. backlight module, it is characterised in that the leaded light formed including the applying method described in claim any one of 1-8
Plate.
10. a kind of display device, it is characterised in that including the backlight module described in liquid crystal panel and claim 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711366731.8A CN107831565A (en) | 2017-12-18 | 2017-12-18 | The applying method of light guide plate and reflector plate, backlight module and display device |
| PCT/CN2018/087393 WO2019119719A1 (en) | 2017-12-18 | 2018-05-17 | Bonding structure for light guide plate and reflective sheet, bonding method and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711366731.8A CN107831565A (en) | 2017-12-18 | 2017-12-18 | The applying method of light guide plate and reflector plate, backlight module and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107831565A true CN107831565A (en) | 2018-03-23 |
Family
ID=61645263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711366731.8A Pending CN107831565A (en) | 2017-12-18 | 2017-12-18 | The applying method of light guide plate and reflector plate, backlight module and display device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107831565A (en) |
| WO (1) | WO2019119719A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108963736A (en) * | 2018-08-16 | 2018-12-07 | 深圳番越光电有限公司 | A kind of high-peak power picosecond and nanosecond short-wavelength light fibre laser |
| WO2019119719A1 (en) * | 2017-12-18 | 2019-06-27 | 青岛海信电器股份有限公司 | Bonding structure for light guide plate and reflective sheet, bonding method and liquid crystal display device |
| US11182006B1 (en) | 2020-08-24 | 2021-11-23 | Chicony Power Technology Co., Ltd. | Illuminated touch panel and backlight assembly thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW461975B (en) * | 1999-05-31 | 2001-11-01 | Nippon Electric Co | Area type light emitting device and manufacturing method thereof |
| CN105945428A (en) * | 2016-06-14 | 2016-09-21 | 长春三友汽车部件制造有限公司 | Endothermic coating used for increasing laser welding weld penetration depth of ultrahigh-strength steel and use method thereof |
| CN107193077A (en) * | 2017-07-24 | 2017-09-22 | 武汉华星光电技术有限公司 | Backlight module and liquid crystal display |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105807360B (en) * | 2014-12-29 | 2019-02-26 | 中强光电股份有限公司 | Light guide plate and light source module |
| CN105739009A (en) * | 2016-05-13 | 2016-07-06 | 京东方科技集团股份有限公司 | Light guide plate and backlight module as well as manufacture method thereof and display device with same |
| CN106353850A (en) * | 2016-11-03 | 2017-01-25 | 南京诺邦新材料有限公司 | Compact ultrathin liquid crystal display backlight module structure and manufacturing method thereof |
| CN107831565A (en) * | 2017-12-18 | 2018-03-23 | 青岛海信电器股份有限公司 | The applying method of light guide plate and reflector plate, backlight module and display device |
-
2017
- 2017-12-18 CN CN201711366731.8A patent/CN107831565A/en active Pending
-
2018
- 2018-05-17 WO PCT/CN2018/087393 patent/WO2019119719A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW461975B (en) * | 1999-05-31 | 2001-11-01 | Nippon Electric Co | Area type light emitting device and manufacturing method thereof |
| CN105945428A (en) * | 2016-06-14 | 2016-09-21 | 长春三友汽车部件制造有限公司 | Endothermic coating used for increasing laser welding weld penetration depth of ultrahigh-strength steel and use method thereof |
| CN107193077A (en) * | 2017-07-24 | 2017-09-22 | 武汉华星光电技术有限公司 | Backlight module and liquid crystal display |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019119719A1 (en) * | 2017-12-18 | 2019-06-27 | 青岛海信电器股份有限公司 | Bonding structure for light guide plate and reflective sheet, bonding method and liquid crystal display device |
| CN108963736A (en) * | 2018-08-16 | 2018-12-07 | 深圳番越光电有限公司 | A kind of high-peak power picosecond and nanosecond short-wavelength light fibre laser |
| US11182006B1 (en) | 2020-08-24 | 2021-11-23 | Chicony Power Technology Co., Ltd. | Illuminated touch panel and backlight assembly thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019119719A1 (en) | 2019-06-27 |
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Application publication date: 20180323 |
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