CN108302378A - A kind of backlight module and display device - Google Patents
A kind of backlight module and display device Download PDFInfo
- Publication number
- CN108302378A CN108302378A CN201711479790.6A CN201711479790A CN108302378A CN 108302378 A CN108302378 A CN 108302378A CN 201711479790 A CN201711479790 A CN 201711479790A CN 108302378 A CN108302378 A CN 108302378A
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- China
- Prior art keywords
- light
- layer
- guide plate
- backlight module
- light guide
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/10—Construction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
- F21V2200/20—Use of light guides, e.g. fibre optic devices, in lighting devices or systems of light guides of a generally planar shape
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Planar Illumination Modules (AREA)
Abstract
The present invention provides a kind of backlight module and display devices, include the side reflector plate positioned at light guide plate non-light source side in backlight module, light separating layer in side reflector plate is transflective layer, the light penetrated in light separating layer is absorbed by using light-absorbing layer, reduces the light intensity that light guide plate is again introduced at marginal position.I.e. side reflector plate to the light projected from light guide plate not only with scattering process but also with absorption, compared to the prior art, the absorption of side reflector plate makes the light scattered from side reflector plate tail off, and the light of scattering can be excited effectively, to solve the colour cast problem of surrounding appearance.
Description
Technical field
This application involves display technology field more particularly to a kind of backlight module and display devices.
Background technology
Colour gamut is to weigh the important parameter for showing product, and high colour gamut TV is the development trend of display industry in recent years,
In, recent years, the method that backlight module realizes high colour gamut mostly uses blue light cooperation yellow quantum dot film, blue light and feux rouges and coordinates
The technologies such as green quantum dot film.It is the side entrance back module of blue light and the green quantum dot film of feux rouges cooperation, the back of the body shown in Fig. 1
Optical mode group includes the ultraviolet light 1 ' as light source, reflector plate 2 ', light guide plate 3 ', green quantum dot film 4 ', and comprising BEF and
The optical diaphragm 5 ' of DBEF, for ultraviolet light 1 ' between glue frame 6 ' and light guide plate 3 ', green quantum dot film 4 ' is located at light guide plate 3 '
On, the light of the transmitting of ultraviolet light 1 ' enters in light guide plate 3 ' to be projected after total reflection, then enters green quantum dot film 4 '
The green quantum dot of middle excitation, reaches display panel after the focusing light effect of optical diaphragm 5 '.Wherein, light source transmitting light into
During entering light guide plate, light guide plate incident side light source some light launch angle is larger, and light cannot be satisfied total reflection, light
It is directly transmitted away from marginal position, the light of transmission cannot achieve whole excitations, and incident side is caused colour cast phenomenon occur.And it is right
In other marginal positions, in order to promote light utilization efficiency, side reflector plate, the material of side reflector plate are pasted in the light guide plate side of non-light incidence side
For PET, only the light transmitted away from marginal position is scattered, but because the light of scattering is more, cannot achieve whole
Excitation so that surrounding has partially red, inclined powder phenomenon.Traditional solution is silk-screen green emitting phosphor, silk-screen absorption feux rouges material
The ink of matter, but aforesaid way can only absorb the light of light guide plate bottom position, from the light of the reflection of light guide plate side, scattering
It can not be excited or absorb, leading to marginal position, there are still colour cast phenomenons.
Invention content
In view of above-mentioned deficiencies of the prior art, the present invention provides a kind of backlight module and display devices, existing to solve
The surrounding colour cast problem of backlight module.
In a first aspect, the present invention provides a kind of backlight module, the backlight module includes light guide plate, is set to the leaded light
The light source of plate incident side, the side reflector plate set on light guide plate non-light source side and the quantum set on the light guide plate light emission side
Point film, the light source are single primary light source, and the side reflector plate includes light separating layer and light-absorbing layer, the light separation
Layer is disposed in proximity to the light guide plate, and the light separating layer is transflective layer, and the transflective layer is used for permeation parts
Light and reflection another part light, the part light of the light-absorbing layer for absorbing the transmission.
Second aspect, the present invention provides a kind of backlight module, the backlight module includes light guide plate, is set to the leaded light
The lamp bar of plate incident side, the side reflector plate set on light guide plate non-light source side and the quantum set on the light guide plate light emission side
Point film, the light source are multiple bases light source, and the side reflector plate includes that light selects layer, light separating layer and light-absorbing layer,
The light selection layer is disposed in proximity to the light guide plate, and the light separating layer is located at light selection layer and the light
Between absorbed layer, the light selection layer is used for through the longest primary lights of wavelength and reflects other primary lights, the light point
Absciss layer is for the longest primary lights of wavelength, the light described in the longest primary lights of wavelength described in permeation parts and reflection another part
Line absorption layer is used to absorb the longest primary lights of the part wavelength of the transmission.
The third aspect, the present invention also provides a kind of display device, display device includes above-mentioned backlight module.
Include the side reflector plate positioned at light guide plate non-light source side, the light in side reflector plate in backlight module provided by the invention
Line separating layer is transflective layer, and the light penetrated in light separating layer is absorbed by using light-absorbing layer, reduces edge
The light intensity of light guide plate is again introduced at position.I.e. side reflector plate not only there is scattering process to the light that is projected from light guide plate but also
With absorption, compared to the prior art, the absorption of side reflector plate makes the light scattered from side reflector plate tail off, and dissipates
The light penetrated can be excited effectively, to solve the colour cast problem of surrounding appearance.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Some bright embodiments for those of ordinary skill in the art without having to pay creative labor, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the structural schematic diagram of side entrance back module in the prior art；
Fig. 2 is the structural schematic diagram of one side entrance back module of the embodiment of the present invention；
Fig. 3 is the structural schematic diagram of side reflector plate used in embodiment one；
Fig. 4 is film interference principle schematic；
Fig. 5 is the structural schematic diagram of light separating layer；
Fig. 6 is the structural schematic diagram of side reflector plate used in embodiment two.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Embodiment one
It is a kind of structural schematic diagram of an embodiment of backlight module provided in an embodiment of the present invention referring to Fig. 2.
As shown in Fig. 2, backlight module provided in an embodiment of the present invention is side entrance back module, backlight module includes reflection
Piece 1, the light guide plate 2 on reflector plate 1, be set to light guide plate 2 light emission side yellow quantum dot film 3, be set to yellow amount
The BEF films and DBEF films as optical diaphragm 4 on son point film 3, and it is set to the sidelight lamp bar 5 of 2 incident side 21 of light guide plate,
Sidelight lamp bar 5 sends out blue light, i.e. light source is single primary light source, and sidelight lamp bar 5 is set in glue frame 6, and glue frame 6, which has, is located at yellow
Support arm between quantum dot film 3 and optical diaphragm 4, support arm support optical diaphragm 4.Positioned at the sidelight of light guide plate incident side 21
The blue light that lamp bar 5 is sent out enters in light guide plate 2, after total reflection, is projected from the light emission side of light guide plate, enters and be located at
The yellow quantum dot film 3 of the light emission side of light guide plate 2 excites, and the white light excited enters optical diaphragm 4.
In addition to incident side 21 and light emission side, light guide plate 2 further includes the first side opposite with incident side 21, incident side and
Second side between one side and third side, first side, second side and third side are the non-light incidence side of light guide plate.
Blue light because entering light guide plate 2 can be projected from the edge of light guide plate 2 i.e. non-light incidence side, and the non-light incidence side implemented in one is provided with
Side reflector plate 7, side reflector plate 7 are set at least one of three sides, may be disposed at a side, and such as first side also may be used
Two sides are set to, such as second side and third side, may also set up in three sides, in order to ensure effect, embodiment one
Middle selection three sides is both provided with side reflector plate 7, and side reflector plate is illustrated only in Fig. 2 and is located at opposite with incident side 21 the
One side, second side and third side are not shown.
It is the structural schematic diagram of side reflector plate 7 used in embodiment one in Fig. 3.Side reflector plate 7 includes light separating layer
71 and light-absorbing layer 72, light separating layer 71 is adjacent with the non-light incidence side of light guide plate 2, and light-absorbing layer 72 is laminated in light point
On absciss layer 71, light-absorbing layer 72 is located remotely from the side of light guide plate 2.
In conjunction with Fig. 1, with reference to Fig. 3, the blue light projected from 2 edge of light guide plate enters light separating layer 71, is detached in light
Under the action of layer 71, a part of blue light is reflected, and another part blue light is transmitted, and the blue light of transmission enters light-absorbing layer 72
It is absorbed.
Light separating layer 71 plays the role of reflection and transmission in above process, that is, realizes to the semi-transparent semi-reflecting of blue light
Function.Light separating layer 71 be realized using film interference principle it is semi-transparent semi-reflecting, by the different multilayer film lamella of refractive index
Product is formed, and refractive index is different between adjacent diaphragms.As shown in figure 4, combination film interference condition, wherein i are the incidence of light
Angle, k1, k2 are integer, and λ is vacuum medium wavelength, and n is film refractive index.
（1）Maximum
（2）Minimum
When thickness d is maximum, interference is mutually grown, and the intensity of reflected light is increased, and is played and is increased anti-effect；When thickness d is minimum
When value, interferes cancellation, increase the intensity of transmitted light, play the role of antireflective.Such as：Light separating layer can take gradually changed refractive index
Mode realize that, as shown in figure 5, incident medium refractive index is 1.5, dense flint glass or light flint glass can be selected in base material
The refractive index of glass, both glass visible lights is relatively high.Low refractive index film can be MgF2（Refractive index is 1.37）, height refraction
Rate film can be ZnS（Refractive index is 2.4）, middle refractive index film can be Al2O3（Refractive index is 1.59）.It is herein light point
The citing of absciss layer structure, but not limited to this, as long as can realize the thin of light separation by the thickness and refractive index that control each film
Film stacked form belongs to invention which is intended to be protected.
Light-absorbing layer 72 is used to absorb the blue light of transmission, has the structure that can realize absorption.For example, passing through
Make base material with absorbing material to realize the absorption to transmitted light, it specifically, can be by way of by substrate tape blacking.
Side reflector plate as a result, comprising light separating layer and light-absorbing layer, which both has the light projected from light guide plate, to be dissipated
The effect of penetrating has absorption again, reduces the light intensity that light guide plate is again introduced at marginal position, compared to the prior art,
The absorption of side reflector plate makes the light scattered from side reflector plate tail off, and the light of scattering can be excited effectively, from
And solve the surrounding colour cast problem because caused by scattering light cannot obtain effectively excitation.
Embodiment two
Different from embodiment one, lamp bar 5 is blue light and red-light source, i.e. multiple bases light source in embodiment two, and quantum dot film is green
Color quantum dot film.Correspondingly, Fig. 6 is the structural schematic diagram of side reflector plate 7 ' used in embodiment two.Side reflector plate 7 ' includes
Light selects layer 70 ', light separating layer 71 ' and light-absorbing layer 72 ', light to select the non-light incidence side phase of layer 70 ' and light guide plate 2
Neighbour above stacks gradually light separating layer 71 ' and light-absorbing layer 72 ' in light selection layer 70 ', and light-absorbing layer 72 ' is located at remote
Side from light guide plate.
In conjunction with Fig. 2, with reference to Fig. 6, the blue light and feux rouges that are projected from 2 edge of light guide plate enter light selection layer 70 ' in light
Under the action of line options layer 70 ', blue light is reflected, and returns to light guide plate 2, and feux rouges transmitted light selection layer 70 ' enters light point
Absciss layer 71 ', under the action of light separating layer 71 ', a part of feux rouges is reflected, and another part feux rouges is transmitted, transmission it is red
Light enters light-absorbing layer 72 ' and is absorbed.
In the present invention light selection layer it is identical with the realization principle of light separating layer, be using film interference principle come reality
It is existing.For example, in one embodiment, it is assumed that 640 nanometers of red spectral band, 450 nanometers of blue wave band work as formula（1）、（2）In K1=
, it can be achieved that blue wave band is maximum when 32, K2=22, blue light increases instead, and red spectral band is minimum, anti-reflection.Thus it realizes pair
The selection of the light emitted line of light source.
Similarly, the light separating layer 71 ' in embodiment two be also formed by the different Multilayer Film lamination of refractive index, and
Refractive index is different between adjacent diaphragms.The structural form of light separating layer 71 in embodiment one can be used in its structural form, can needle
To selecting different thickness and refractive index to realize the function of reflection and transmission by the difference of the wavelength of separation light.
Light-absorbing layer 72 ' is used to absorb the feux rouges of transmission, has the structure that can realize absorption.For example, logical
Crossing makes base material with absorbing material to realize the absorption to transmitted light, specifically, can be by way of by substrate tape blacking.
Since human eye is different to the susceptibility of different wavelengths of light, when light source uses multiple bases light source, in side reflector plate
Light selection layer is used for through the longest primary lights of wavelength and reflects other primary lights, wavelength described in light separating layer permeation parts
The longest primary lights of wavelength described in longest primary lights and reflection another part, light-absorbing layer are used to absorb the part institute penetrated
State the longest primary lights of wavelength.Side reflector plate both has scattering process to the longest light of the wavelength projected from light guide plate as a result,
There is absorption again, reduce the light intensity for being again introduced into light guide plate at marginal position, compared to the prior art, lateral reflection
The absorption of piece makes the light scattered from side reflector plate tail off, and the light of scattering can be excited effectively, to solve
The surrounding colour cast problem because caused by scattering light cannot obtain effectively excitation.
It the above is only the specific implementation mode of the present invention, it is noted that those skilled in the art are come
It says, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (8)
1. a kind of backlight module, the backlight module include light guide plate, set on the light guide plate incident side light source, be set to it is described
The side reflector plate of light guide plate non-light source side and quantum dot film set on the light guide plate light emission side, which is characterized in that the light
Source is single primary light source, and the side reflector plate includes light separating layer and light-absorbing layer, and the light separating layer, which is set to, to be leaned on
The nearly light guide plate, the light separating layer are transflective layer, and the transflective layer is divided for through portion and reflects another
A part of light, the light-absorbing layer are laminated in the light separating layer, and the light-absorbing layer is for absorbing the transmission
The part light.
2. a kind of backlight module, the backlight module include light guide plate, set on the light guide plate incident side light source, be set to it is described
The side reflector plate of light guide plate non-light source side and quantum dot film set on the light guide plate light emission side, which is characterized in that the light
Source is multiple bases light source, and the side reflector plate includes light selection layer, light separating layer and light-absorbing layer, the light selection
Layer is disposed in proximity to the light guide plate, and the light separating layer is located between light selection layer and the light-absorbing layer,
The light selection layer is used for through the longest primary lights of wavelength and reflects other primary lights, and the light separating layer is semi-transparent half
Anti- layer, the transflective layer is for wavelength longest described in the longest primary lights of wavelength described in permeation parts and reflection another part
Primary lights, the light-absorbing layer is used to absorb the longest primary lights of the part wavelength of the transmission.
3. backlight module as described in claim 1, it is characterised in that：The list primary light source is blue light source, the quantum
Point film is yellow quantum dot film.
4. backlight module as claimed in claim 2, it is characterised in that：The multiple bases light source is blue light and red-light source, institute
It is green quantum dot film to state quantum dot film.
5. backlight module as claimed in claim 1 or 2, it is characterised in that：The light selection layer and the light separating layer
It is formed by the different Multilayer Film lamination of refractive index, and refractive index is different between adjacent diaphragms.
6. backlight module as described in claim 1, it is characterised in that：The light separating layer includes substrate layer, in the base
The Al stacked gradually on material layer2O3Film, ZnS films, MgF2Film.
7. backlight module as claimed in claim 5, it is characterised in that：The substrate layer is dense flint glass or light flint glass
Glass.
8. a kind of display device, which is characterized in that including claim 1-7 any one of them backlight modules.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711479790.6A CN108302378A (en) | 2017-12-29 | 2017-12-29 | A kind of backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711479790.6A CN108302378A (en) | 2017-12-29 | 2017-12-29 | A kind of backlight module and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108302378A true CN108302378A (en) | 2018-07-20 |
Family
ID=62868214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711479790.6A Pending CN108302378A (en) | 2017-12-29 | 2017-12-29 | A kind of backlight module and display device |
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| Country | Link |
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| CN (1) | CN108302378A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110426892A (en) * | 2019-07-05 | 2019-11-08 | 青岛海信电器股份有限公司 | A kind of backlight module and display device |
| CN113093435A (en) * | 2021-01-05 | 2021-07-09 | 青岛海信移动通信技术股份有限公司 | Electronic equipment |
| CN113467150A (en) * | 2021-01-05 | 2021-10-01 | 青岛海信移动通信技术股份有限公司 | Display device |
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| CN205208250U (en) * | 2015-05-27 | 2016-05-04 | 厦门天马微电子有限公司 | Backlight module and liquid crystal display (LCD) device |
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| CN107340647A (en) * | 2017-09-01 | 2017-11-10 | 青岛海信电器股份有限公司 | A kind of method for solving the backlight module edge colour cast using fluorescent film |
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| CN104163022A (en) * | 2014-08-07 | 2014-11-26 | 宜昌南玻显示器件有限公司 | Semi reflective and semi transparent glass and preparation method thereof |
| CN204076964U (en) * | 2014-08-07 | 2015-01-07 | 宜昌南玻显示器件有限公司 | Half-reflection and half-transmission glass |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110426892A (en) * | 2019-07-05 | 2019-11-08 | 青岛海信电器股份有限公司 | A kind of backlight module and display device |
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| CN113467150A (en) * | 2021-01-05 | 2021-10-01 | 青岛海信移动通信技术股份有限公司 | Display device |
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| CB02 | Change of applicant information |
Address after: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Applicant after: Hisense Video Technology Co., Ltd Address before: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Applicant before: HISENSE ELECTRIC Co.,Ltd. |
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Application publication date: 20180720 |
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