CN105938273A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
- Publication number
- CN105938273A CN105938273A CN201610394199.XA CN201610394199A CN105938273A CN 105938273 A CN105938273 A CN 105938273A CN 201610394199 A CN201610394199 A CN 201610394199A CN 105938273 A CN105938273 A CN 105938273A
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- China
- Prior art keywords
- backlight
- backlight module
- ink layer
- pcb board
- reflective ink
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
-
- 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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0274—Optical details, e.g. printed circuits comprising integral optical 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)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a backlight module and a display device. The backlight module comprises PCB fixedly provided with backlight sources and reflection sheets attached to the inner board surfaces of the PCB, wherein through holes for the backlight sources to penetrate through are formed in the reflection sheets, and reflection layers for reflecting light are arranged in gap regions, between the outer edges of the backlight sources and the edges of the through holes, of the PCB. By the adoption of the technical scheme, the utilization rate of the backlight sources and the uniformity of backlight brightness of the display device can be improved, and accordingly the display quality of the display device is improved.
Description
Technical field
The present invention relates to display device technical field, particularly to a kind of backlight module and display device.
Background technology
In display device of today (such as liquid crystal display, LCD TV etc.), due to backlight
And it is usually present matching difference between optics, such as, at the directly-down liquid crystal being done backlight by LED
In display device, for making reflector plate convenient with pcb board and the LED being fixedly arranged on pcb board firmly to paste
Close, its reflector plate would generally offer and expose and the through hole big compared with LED for LED by corresponding LED, now,
In this through hole, the pcb board being not covered with reflector plate will be manifested around LED, and pcb board is to light
The reflection of line is relatively low, therefore on the one hand may result in backlight and can not make full use of, on the other hand so that
Brightness around backlight is relatively low, so that the uniformity of the backlight illumination of display device reduces, these are two years old
Aspect all reduces the display quality of display device.
Summary of the invention
The main object of the present invention is to provide a kind of backlight module, it is intended to improves the utilization rate of backlight and shows
Show the uniformity of equipment backlight illumination, and then improve the display quality of display device.
For achieving the above object, the backlight module that the present invention proposes, including the pcb board being installed with backlight
And fitting in the reflector plate of described pcb board inner plate surface, described reflector plate is provided with to be worn for described backlight
If through hole, described pcb board described backlight outer and described through hole hole along between gap area set
There is the reflecting layer for reflecting light.
Preferably, described reflecting layer is reflective ink layer.
Preferably, described reflective ink layer is white or silvery white.
Preferably, the material of described reflective ink layer includes glass particle.
Preferably, described reflective ink layer is formed on described pcb board by silk-screen mode.
Preferably, the thickness of described reflective ink layer is 10um～40um.
Preferably, the thickness of described reflective ink layer is 25um～40um.
Preferably, described reflecting layer is the reflective membrane fitting in described pcb board.
Preferably, described backlight module also includes that interval is located at above described reflector plate for allowing light uniformly divide
The diffuser plate of cloth and be laminated in the optical diaphragm group in order to improve light distribution above described diffuser plate
Part, described optical diaphragm assembly include the lower diffusion sheet stacked gradually from the bottom up, upper diffusion sheet and
Prismatic lens.
The present invention also proposes a kind of display device, and including backlight module, this backlight module includes being installed with the back of the body
The pcb board of light source and fit in the reflector plate of described pcb board inner plate surface, described reflector plate is provided with confession
The through hole that described backlight wears, described pcb board is between described backlight outer and edge, described through hole hole
Gap area be provided with the reflecting layer for reflecting light.
In technical scheme, between on pcb board between backlight outer and edge, through hole hole
Gap region arranges reflecting layer, and this reflecting layer has the feature of reflection for light, therefore compared to the most often
That sees causes directly exposing pcb board at gap area because of the matching difference between backlight and reflector plate
Scheme, the reflectance of the light sent backlight due to reflecting layer is far above pcb board, so, a side
The light that face can make backlight send more can be reflected away by this reflecting layer, thus improves backlight
Utilization rate；On the other hand, by the reflecting layer reflection to light, can make around original backlight bright
Spending relatively low region, the brightness of the gap area i.e. exposing pcb board improves, thus avoids display device
The bright or dark situation of backlight occur, and then improve the uniformity of the backlight illumination of display device, this
Two aspects act on the image display quality that can improve display device jointly.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality
Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that below,
Accompanying drawing in description is only some embodiments of the present invention, for those of ordinary skill in the art,
On the premise of not paying creative work, it is also possible to obtain other according to the structure shown in these accompanying drawings
Accompanying drawing.
Fig. 1 is the cross-sectional view of backlight module one embodiment of the present invention；
Fig. 2 is the top view of pcb board in Fig. 1；
Fig. 3 is the enlarged diagram in Fig. 1 at A；
Fig. 4 is the enlarged diagram in Fig. 1 at B.
Drawing reference numeral illustrates:
| Label | Title | Label | Title |
| 1 | Pcb board | 2 | Backlight |
| 21 | LED | 22 | Lens |
| 3 | Reflector plate | 4 | Reflective ink layer |
| 5 | Diffuser plate | 6 | Optical diaphragm assembly |
| 61 | Lower diffusion sheet | 62 | Upper diffusion sheet |
| 63 | Prismatic lens |
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, do referring to the drawings further
Explanation.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention,
Rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
Make the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
It is to be appreciated that if the embodiment of the present invention relates to directivity instruction (such as upper and lower, left and right,
It is forward and backward ...), then directionality instruction is only used for explaining under a certain particular pose (as shown in drawings)
Relative position relation between each parts, motion conditions etc., if this particular pose changes, then
Directionality instruction changes the most therewith.
If it addition, the embodiment of the present invention relates to the description of " first ", " second " etc., then be somebody's turn to do " the
One ", the description of " second " etc. is only used for describing purpose, and it is not intended that instruction or imply that it is relatively heavy
The property wanted or the implicit quantity indicating indicated technical characteristic.Thus, " first ", " second " are defined
Feature can express or implicitly include at least one this feature.It addition, between each embodiment
Technical scheme can be combined with each other, but must be based on those of ordinary skill in the art are capable of,
When the combination of technical scheme occur conflicting maybe cannot realize time will be understood that the combination of this technical scheme
Do not exist, the most not within the protection domain of application claims.
The present invention proposes a kind of backlight module for display device.
Seeing figures.1.and.2, in an embodiment of the present invention, this backlight module includes being installed with backlight 2
Pcb board 1 and fit in the reflector plate 3 of this pcb board 1 inner plate surface.Specifically, in the present embodiment
In, the display device with this backlight module is Straight-down type liquid crystal television (not shown).Wherein, in reflection
Sheet 3 is provided with the through hole worn for backlight 2, and pcb board 1 is on backlight 2 outer and edge, through hole hole
Between gap area be then provided with the reflecting layer for reflecting light.Specifically, in the present embodiment, should
Reflecting layer is reflective ink layer 4.
In the present embodiment, by pcb board 1 in backlight 2 outer and through hole hole along between gap
Region arranges reflective ink layer 4, and this reflective ink layer 4 mainly has the feature of reflection for light, therefore
Cause at gap area because of the matching difference between backlight 2 and reflector plate 3 compared to the most common
Directly expose the scheme of pcb board 1, in the inventive solutions, owing to reflective ink layer 4 is right
The reflectance of the light that backlight 2 sends is far above pcb board 1, so, on the one hand can make backlight 2
The light sent more can be reflected away by this reflective ink layer 4, thus improves the profit of backlight 2
By rate；On the other hand, by the reflection to light of the reflective ink layer 4, original backlight can be made 2 weeks
Enclosing the region that brightness is relatively low, the brightness of the gap area i.e. exposing pcb board 1 improves, thus avoids
Bright or the dark situation of the backlight of display device occurs, and then improves backlight illumination equal of display device
Even property, these two aspects acts on the image display quality that can improve display device jointly.
So the design is not limited to this, and in other embodiments of the present invention, this reflecting layer can also be designed as it
His reflective structure, such as but not limited to, reflecting layer is the reflective membrane fitting in pcb board 1.But, phase
Compared with reflective membrane, the reflective ink layer 4 used in the present embodiment is in addition to having the advantage on cost, also
Because reflective ink layer 4 can be invested on pcb board 1 by simple silk screen printing process, therefore also has technique
Convenience in manufacture.
With reference to Fig. 1 and Fig. 3, in the present embodiment, backlight 2 preferably includes LED 21 and is located at LED
The lens 22 that point source is converted into area source on lamp 21, these lens 22 wear through hole and manifest anti-
Penetrate sheet 3.It is appreciated that correspondingly, on pcb board 1 between lens 22 outer and edge, through hole hole
Gap area should be the position that reflective ink layer 4 is arranged.In addition, it is necessary to explanation, in the present embodiment,
Pcb board 1 is the package carrier of backlight 2, and multiple backlights 2 are fixedly arranged on pcb board 1 in SMD,
And multiple backlight 2 on pcb board 1, in array, interval is arranged, to form backlight 2 light source matrix,
This is the set-up mode of the backlight 2 in common Straight-down type liquid crystal television.
For improving utilization rate and the uniformity of backlight illumination of backlight 2 further, in the present embodiment, instead
Gloss oil layer of ink 4 is preferably white or silvery white.Certainly, in other embodiments, when reflecting layer is reflection
During film, similarly, the color of reflectance coating can also be preferably white or silvery white, this is because generally use
What the LED 21 in display device sent is, and the wavelength being mixed into by three primary colours is 450nm～600nm
Mixed white light, and white or argenteous reflecting layer is higher for the reflectance of this white light.So the design
Being not limited to this, reflective ink layer 4 color also can be allocated according to actual requirement, the invention is not limited in this regard.
It should be strongly noted that for making reflective ink layer 4 can reach preferable light reflecting effect, this
Invention technical scheme in, the material of reflective ink layer 4 in addition to including colorant, binder, auxiliary agent,
Also include nano level glass particle.It is appreciated that by lens refraction and the principle of concave spherical surface reflection,
This glass particle can make reflective ink layer 4 when backlight 2 irradiates, and can produce the high light of high reflectance,
This reflectance is significantly larger than the reflectance of the most common white ink, and does not produce dazzle.It addition, in
In the present embodiment, the material of reflective ink layer 4 is both preferably nanoscale, the nanoscale of reflective ink layer 4
Form heat emissivity coefficient and the heat transfer efficiency owing to ink can be increased, therefore for the reduction of pcb board 1 temperature
There is certain effect, thus can indirectly promote light efficiency and the brightness of backlight 2.
In the inventive solutions, it is mainly by the adjustment of reflective ink layer 4 thickness is realized
Different reflectance.In general, the thickness of reflective ink layer 4 is proportional with its reflectance, such as,
When the thickness of reflective ink layer 4 is 10um～40um, it is to the mixed white light that backlight 2 sends
Reflectance is 65～92%, and this reflectance is more than the common pcb board 1 reflectance to mixed white light.When
So, in the present embodiment, the thickness of reflective ink layer 4 is preferably 25um～40um.When reflective ink layer 4
Thickness when this scope, its to the reflectance of the mixed white light that backlight 2 sends up to 85～92%,
This reflectance and the reflectance reflectance unanimous on the whole or slightly below reflector plate 3 of conventional reflector plate 3,
And the reflectance of significantly larger than pcb board 1, so that the light that backlight 2 sends can be reflective by this
Ink layer 4 more reflects away, and then can improve the utilization rate of backlight 2 and the uniform of backlight illumination
Property.It addition, by the structure adjusting of thickness, color and pattern form to reflective ink layer 4, also
Can control the intensity of reflection light quantity, and control reflective ink layer 4 and reflect the light of different wave length, from
And the overall photochromic distribution of backlight module and light intensity can be adjusted.
Specifically, for making the thickness controllable precise of reflective ink layer 4, reflective ink layer 4 is excellent
Gating silk rolling India side formula is formed on pcb board 1, and the thickness of reflective ink layer 4 can be by the mesh number of silk-screen
And print pass controls.Certainly, reflective ink layer 4 also can be coated with and invest on pcb board 1, but this kind of side
Formula is not so good as silk-screen mode for the control of the thickness of reflective ink layer 4, and silk-screen is the work of a kind of maturation
The mass production of skill, beneficially product.
For improving the image display quality of display device further, as shown in Figure 1 and Figure 4, further,
This backlight module also include interval be located at above reflector plate 3 for allow the equally distributed diffuser plate of light 5 and
It is laminated in the optical diaphragm assembly 6 in order to improve light distribution above diffuser plate 5.Wherein, blooming piece
Assembly 6 includes lower diffusion sheet 61, upper diffusion sheet 62 and the prismatic lens 63 stacked gradually from the bottom up.
Being appreciated that in the inventive solutions, it is anti-that reflector plate 3 and reflective ink layer 4 collectively constitute one
Penetrate face, and the region between diffuser plate 5 and this reflecting surface is mixed light district.The photochromic distribution in this mixed light district
Reflected by the ink layer 4 photochromic, reflective of LED 21 and reflector plate 3 combining lens 22 or inhaled
The photochromic mixing received forms, and can be adjusted according to actual needs.When display device works, light warp
Outwards reflected via lens 22 by LED 21 or reflect, and via reflective ink layer 4 and bottom
The reflection of reflector plate 3, more i.e. obtain uniform light distribution via diffuser plate 5 and optical diaphragm assembly 6.
It addition, in the design of the present invention, except this backlight module can be utilized to carry out the tune of wavelength of backlight
Outside whole, it is also possible to be used in combination with the optical filter of liquid crystal panel (not shown), so that wavelength of backlight is carried out
Overall correction, and then colour gamut can be improved, the overall display effect making LCD TV is more preferable.
The present invention also proposes a kind of display device, and this display device includes backlight module, this backlight module
Concrete structure is with reference to above-described embodiment, owing to this display device have employed whole skills of above-mentioned all embodiments
Art scheme, the most at least has all beneficial effects that the technical scheme of above-described embodiment is brought, at this
Repeat the most one by one.
The foregoing is only the preferred embodiments of the present invention, not thereby limit the scope of the claims of the present invention,
Every under the inventive concept of the present invention, utilize the equivalent structure that description of the invention and accompanying drawing content are made
Conversion, or directly/be indirectly used in other relevant technical fields and be included in the patent protection model of the present invention
In enclosing.
Claims (10)
1. a backlight module, for display device, it is characterised in that include being installed with backlight
Pcb board and fit in the reflector plate of described pcb board inner plate surface, described reflector plate is provided with for described
The through hole that backlight wears, between described pcb board is between described backlight outer and edge, described through hole hole
Gap region is provided with the reflecting layer for reflecting light.
2. backlight module as claimed in claim 1, it is characterised in that described reflecting layer is reflective ink
Layer.
3. backlight module as claimed in claim 2, it is characterised in that described reflective ink layer is white
Or silvery white.
4. backlight module as claimed in claim 2, it is characterised in that the material of described reflective ink layer
Including glass particle.
5. backlight module as claimed in claim 2, it is characterised in that described reflective ink layer passes through silk
India side formula is formed on described pcb board.
6. backlight module as claimed in claim 2, it is characterised in that the thickness of described reflective ink layer
For 10um～40um.
7. backlight module as claimed in claim 6, it is characterised in that the thickness of described reflective ink layer
For 25um～40um.
8. backlight module as claimed in claim 1, it is characterised in that described reflecting layer is for fitting in
State the reflective membrane of pcb board.
9. backlight module as claimed in claim 1, it is characterised in that between described backlight module also includes
Every being located at above described reflector plate for allowing the equally distributed diffuser plate of light and be laminated in described diffuser plate
The optical diaphragm assembly in order to improve light distribution of top, described optical diaphragm assembly includes from the bottom up
The lower diffusion sheet stacked gradually, upper diffusion sheet and prismatic lens.
10. a display device, it is characterised in that include as described in claim 1 to 9 any one
Backlight module.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610394199.XA CN105938273B (en) | 2016-06-03 | 2016-06-03 | Backlight module and display device |
| PCT/CN2016/095373 WO2017206366A1 (en) | 2016-06-03 | 2016-08-15 | Backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610394199.XA CN105938273B (en) | 2016-06-03 | 2016-06-03 | Backlight module and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105938273A true CN105938273A (en) | 2016-09-14 |
| CN105938273B CN105938273B (en) | 2017-12-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610394199.XA Active CN105938273B (en) | 2016-06-03 | 2016-06-03 | Backlight module and display device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105938273B (en) |
| WO (1) | WO2017206366A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109307954A (en) * | 2018-10-31 | 2019-02-05 | 武汉华星光电技术有限公司 | Backlight module and liquid crystal display |
| CN110161753A (en) * | 2019-05-31 | 2019-08-23 | 厦门天马微电子有限公司 | A kind of backlight module and display device |
| WO2019227618A1 (en) * | 2018-05-28 | 2019-12-05 | 武汉华星光电技术有限公司 | Led-based planar light source, manufacturing method thereof, and display panel |
| CN113296309A (en) * | 2020-02-24 | 2021-08-24 | 海信视像科技股份有限公司 | Display device |
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| CN109511217A (en) * | 2019-01-07 | 2019-03-22 | 深圳市顺荣昌电路有限公司 | A kind of high reflectance energy conservation double-face backlight wiring board |
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| CN111812890A (en) * | 2020-08-06 | 2020-10-23 | 惠州视维新技术有限公司 | Light-emitting structure, backlight module and display device |
| CN111948854A (en) * | 2020-08-21 | 2020-11-17 | 安徽芯瑞达科技股份有限公司 | Ultra-thin straight following formula backlight unit based on chip level light emitting area |
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| CN109307954B (en) * | 2018-10-31 | 2024-04-09 | 武汉华星光电技术有限公司 | Backlight module and liquid crystal display |
| CN110161753A (en) * | 2019-05-31 | 2019-08-23 | 厦门天马微电子有限公司 | A kind of backlight module and display device |
| CN113296309A (en) * | 2020-02-24 | 2021-08-24 | 海信视像科技股份有限公司 | Display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105938273B (en) | 2017-12-29 |
| WO2017206366A1 (en) | 2017-12-07 |
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