CN108279532A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
- Publication number
- CN108279532A CN108279532A CN201810078975.4A CN201810078975A CN108279532A CN 108279532 A CN108279532 A CN 108279532A CN 201810078975 A CN201810078975 A CN 201810078975A CN 108279532 A CN108279532 A CN 108279532A
- Authority
- CN
- China
- Prior art keywords
- light
- light source
- backlight module
- optical layer
- quantum dot
- 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.)
- Granted
Links
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
- G02F1/133605—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
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
Landscapes
- 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
This application discloses a kind of backlight module and display devices, belong to display technology field.The backlight module includes：Multiple light sources and quantum dot diaphragm, the excitation light excitation quantum point diaphragm that light source is sent out generate exciting light, and backlight module further includes three-dimensional reflector plate, and three-dimensional reflector plate includes a plurality of cavities of array setting, and cavity is made of bottom surface and side, and light source is located at the bottom surface of cavity；Configured with the optical layer for partially transmitted and partially reflecting excitation light between light source and quantum dot diaphragm；Wherein, when the ratio H/P of light source to the height H of the optical layer and length P of cavity long side are 0.2≤H/P≤0.35, optical layer meets 0.25≤m≤1 to the single transmitance m of excitation light.For the light sent out present application addresses each light extraction region of backlight module there are colour mixture, the relatively low problem of contrast between each light extraction region improves the contrast between each light extraction region.The application is for providing backlight.
Description
Technical field
This application involves display technology field, more particularly to a kind of backlight module and display device.
Background technology
With the development of display technology, requirement of the people to display device is higher and higher.Display device includes backlight module,
The contrast in each light extraction region is most important for the display effect of display device in backlight module.
In the related technology, backlight module includes：Substrate, and the luminescent layer and quantum dot film that are successively set on substrate
Piece.Wherein, luminescent layer includes multiple light emitting diodes（English：Light Emitting Diode；Referred to as：LED）, under straight
Backlight is divided into multiple independent control units by formula LED backlight module.It is every according to the brightness of image modulated in real time in each region
Backlight illumination corresponding to a backlight subarea, quantum dot diaphragm include and the multiple light extraction regions correspondingly multiple LED.Each
LED can send out blue light to its corresponding light extraction region.It should be noted that being provided with red quantum in each light extraction region
Point material and green quanta point material, and red quantum dot material and green quanta point material can be under the excitations of blue light to each
A direction sends out feux rouges and green light so that each light extraction region sends out the light of three kinds of colors of RGB.
It should be noted that backlight subarea is ideally, each backlight subarea can independently illuminate its backlight area, but real
On border, adjacent light extraction regional luminance has certain influence, causes the contrast between each light extraction region of backlight module relatively low.
Invention content
This application provides a kind of backlight module and display device, can solve contrast between each light extraction region compared with
Low problem.The technical solution is as follows：
In a first aspect, providing a kind of backlight module, the backlight module includes：Multiple light sources and quantum dot diaphragm, the light
Quantum dot diaphragm described in the excitation light directive that source is sent out, and the quantum dot diaphragm is excited to generate exciting light, the exciting light with
The excitation light is mixed into white backlight, it is characterised in that：The backlight module further includes three-dimensional reflector plate, the three-dimensional reflection
Piece includes a plurality of cavities of array setting, and the cavity is made of bottom surface and side, and the light source is located at the bottom surface of the cavity；
Configured with the optical layer for partially transmitted and partially reflecting the excitation light between the light source and the quantum dot diaphragm；Wherein,
When the ratio H/P of the light source to the height H of the optical layer and length P of the cavity long side are 0.2≤H/P≤0.35,
The optical layer meets 0.25≤m≤1 to the single transmitance m of the excitation light.
Second aspect, provides a kind of display device, and the display device includes above-mentioned backlight module.
The advantageous effect that technical solution provided by the present application is brought is：
This application provides a kind of backlight module and display device, backlight module includes three-dimensional reflector plate, and three-dimensional reflector plate includes
The a plurality of cavities of array setting, cavity are made of bottom surface and side, and light source is located at the bottom surface of cavity, in light source and quantum dot diaphragm
Between configured with partially transmitted and partially reflecting the optical layer of the excitation light, wherein the height H and cavity of light source to optical layer
The ratio H/P and optical layer of the length P of long side meets qualified relation to the single transmitance m of excitation light.So, light source is sent out
The light gone out under the action of three-dimensional reflector plate and optical layer, the corresponding light extraction region of the light source only on directive quantum dot diaphragm and produce
Raw exciting light, there is no the faces where light source to reflex to other light extraction regions on quantum dot diaphragm, reduces light source（Such as
LED）Range of exposures, realize the convergence to the hot spot of light source, meanwhile, the presence of optical layer improves three-dimensional reflector plate and individually mixes
The uniformity of optical cavity emergent light improves the contrast between each light extraction region of backlight module.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present application, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is a kind of structural schematic diagram of backlight module provided in an embodiment of the present invention；
The schematic diagram of light receiving surface when Fig. 2 a are a kind of unused optical layers provided in an embodiment of the present invention；
Fig. 2 b are a kind of brightness curve figures of unused optical layer time receiving surface provided in an embodiment of the present invention；
Fig. 3 a be it is provided in an embodiment of the present invention it is a kind of using optical layer when light receiving surface schematic diagram；
Fig. 3 b are a kind of brightness curve figures using optical layer time receiving surface provided in an embodiment of the present invention；
Fig. 4 is a kind of relation schematic diagram of the reflectivity of optical layer provided in an embodiment of the present invention about wavelength；
Fig. 5 is a kind of structural schematic diagram for backlight module that the relevant technologies provide；
Fig. 6 is the structural schematic diagram of another backlight module provided in an embodiment of the present invention；
Fig. 7 is a kind of relation schematic diagram of the reflectivity of second layer provided in an embodiment of the present invention about wavelength；
Fig. 8 is a kind of relation schematic diagram of the reflectivity of first layer provided in an embodiment of the present invention about wavelength；
Fig. 9 is relation schematic diagram of the reflectivity of another first layer provided in an embodiment of the present invention about wavelength；
Figure 10 is the structural schematic diagram of another backlight module provided in an embodiment of the present invention.
Specific implementation mode
To keep the purpose, technical scheme and advantage of the application clearer, below in conjunction with attached drawing to the application embodiment party
Formula is described in further detail.
With the development of display technology, requirement of the people to the display effect of display device is higher and higher, if display device
Contrast between each light extraction region of middle backlight module is higher, then display device can have preferable display effect.This hair
Bright embodiment provides the higher backlight module of contrast between a kind of each light-emitting zone.
Fig. 1 is a kind of structural schematic diagram of backlight module provided in an embodiment of the present invention.As shown in Figure 1, backlight module 10
May include：Multiple light sources 101 and quantum dot diaphragm 102, the excitation light directive quantum dot diaphragm 102 that light source 101 is sent out, and swash
It sends out quantum dot diaphragm 102 and generates exciting light, which can be mixed into white backlight with the excitation light that light source 101 is sent out.
Backlight module 10 further includes three-dimensional reflector plate 103, and three-dimensional reflector plate 103 includes a plurality of cavities of array setting
103h, cavity 103h are made of bottom surface 1031 and side 1032.The excitation light that three-dimensional reflector plate 103 is used to send out light source 101
It is reflected.
Optical layer 104 is additionally provided between light source 101 and quantum dot diaphragm 102, which swashs to what light source was sent out
It encourages light and carries out part reflection and fractional transmission, is i.e. optical layer has certain transmitance to excitation light.The reflection of three-dimensional reflector plate
The part reflex of effect and optical layer makes the excitation light that light source is sent out that multiple reflections mixed light can occur in cavity so that
Emergent light is more uniform.
In order to ensure the uniformity of emergent light to meet the needs of display, in an embodiment of the present invention, light source 101 arrives light
When the ratio H/P for learning the height H of the layer 104 and length P of 103 long side of cavity is 0.2≤H/P≤0.35, optical layer 104 is to excitation
The single transmitance m of light meets 0.25≤m≤1, research shows that light source is to the height H's of the optical layer and length P of cavity long side
When ratio H/P and optical layer meet above-mentioned qualified relation to the single transmitance m of excitation light, the three-dimensional single light mixing chamber of reflector plate goes out
Penetrate having good uniformity for light, meet the display demand of display device, in the case of being unsatisfactory for above-mentioned qualified relation, emergent light it is equal
Even property is poor, is unable to reach display and requires.
Illustratively, when the ratio H/P of the height H of light source to the optical layer and length P of cavity long side and optical layer are to swashing
The single transmitance m for encouraging light takes following values respectively：When H/P is 0.2, m takes 0.25；When H/P is 0.25, m takes 0.6, the H/P to be
When 0.35, when m takes 1, under the compound action of three-dimensional reflector plate and optical layer, from the emergent light of the single light mixing chamber of three-dimensional reflector plate
More uniformly, reach the display requirement of display device.
Exemplary, light source 101 can be light emitting diode（English：Light Emitting Diode；Referred to as：LED）, light
Source 101 can send out blue light, and multiple light source can be arranged on the A of face, can be arranged where light source in quantum dot diaphragm 102
There is quanta point material, which can be made of red quantum dot material and green quanta point material（It is not marked in Fig. 1
Quanta point material）, red quantum dot material can send out feux rouges, green quantum dot under the excitation for the blue light that light source 101 is sent out
Material can send out green light under the excitation of the blue light.
Quantum dot diaphragm 102 may include with 101 one-to-one light extraction region of multiple light sources, when need control quantum dot
When certain light extraction region of diaphragm 102 shines, the corresponding light source in the light extraction region 101 can be controlled and send out blue light, so that should
Light extraction region generates exciting light under the excitation of the blue light.If the corresponding light extraction of the blue light only directive light source that each light source is sent out
Region, the then light that each light source is sent out will not interfere with each other, and then can improve the contrast between each light extraction region.
As shown in Figure 1, light source 101 is placed on the bottom surface of cavity 103h, the excitation light that light source is sent out is in the anti-of cavity side
It is radiated in the optical layer 104 of light source region under the effect of penetrating, the hot spot of light source is restrained, the irradiation of light source is reduced
A part in excitation light further because optical layer 104 has partial reflection, is reflexed to cavity floor or side by range
Face, this some light is using multiple reflections, and the angle of light changes in reflection process, from there through keeping excitation light multiple
Mixed light is carried out in the cavity of three-dimensional reflector plate, to improve the uniformity of the single light mixing chamber outgoing of three-dimensional reflector plate.
It is that optical layer is not used and is analyzed using the effect comparison of illumination uniformity when optical layer under the same terms below.
Fig. 2 a are light receiving surface schematic diagram when optical layer is not used, and the coordinate system in Fig. 2 a can be in the light receiving surface
The coordinate system of foundation.Fig. 2 b are the brightness curve figure of light receiving surface when optical layer is not used, show altogether in Fig. 2 b two it is bright
It writes music line（Respectively brightness curve x1 and brightness curve y1）, line segment a1, brightness curve y1 in brightness curve x1 corresponding diagrams 2a
Line segment b1 in corresponding diagram 2a.The abscissa of the brightness curve figure is used to indicate the position in light receiving surface, the brightness curve figure
Ordinate be the position brightness.Exemplary, the abscissa of the certain point on brightness curve x1 is used to indicate Fig. 2 a middle conductors
The abscissa of point in a1 indicated by abscissa identical with the abscissa, the certain point on brightness curve y1 is used to indicate Fig. 2 a
Ordinate point identical with the abscissa in middle conductor b1.
Fig. 3 a are to use optical layer（Ratio of the light source to the height H and the length P of the cavity long side of three-dimensional reflector plate of optical layer
Value H/P is 0.2≤H/P≤0.35, and optical layer meets 0.25≤m≤1 to the single transmitance m of excitation light）When light receiving surface
Schematic diagram, the coordinate system in Fig. 3 a can be the coordinate system established in the light receiving surface.Light when Fig. 3 b are using optical layer connects
By the brightness curve figure in face, two brightness curves are shown altogether in Fig. 3 b（Respectively brightness curve x2 and brightness curve y2）, bright
Line segment b2 in line segment a2 in line x2 corresponding diagrams of writing music 3a, brightness curve y2 corresponding diagrams 3a.The abscissa of the brightness curve figure
It is used to indicate the position in light receiving surface, the ordinate of the brightness curve figure is the brightness of the position.It is exemplary, brightness curve x2
On the abscissa of certain point be used to indicate the point in Fig. 3 a middle conductors a2 indicated by abscissa identical with the abscissa, brightness
The abscissa of certain point on curve y2 is used to indicate ordinate point identical with the abscissa in Fig. 3 a middle conductors b2.
Comparison diagram 2a and Fig. 3 a and Fig. 2 b and Fig. 3 b can be seen that the gap between x2 and y2 and is less than between x1 and y1
Gap, it will be apparent that, under the mating reaction of three-dimensional reflector plate and optical layer, emergent light has good uniformity, improves the back of the body
The contrast in each light extraction region of optical mode group.It should be noted that the E+004 in Fig. 2 b and Fig. 3 b indicates 104, exemplary, figure
1.2E+004 in 2b indicates that 12000,2.8E+004 indicates 28000.
Optionally, it reserves certain interval between the cavity top of three-dimensional reflector plate 103 and optical layer 104, is protected with this
The light of card cavity top corresponding region is evenly distributed, and avoids blackening occur in this region, ensures each output optical zone of backlight module
The contrast in domain.
In conclusion backlight module provided in an embodiment of the present invention includes three-dimensional reflector plate, three-dimensional reflector plate includes array
The a plurality of cavities of setting, cavity are made of bottom surface and side, and light source is located at the bottom surface of cavity, between light source and quantum dot diaphragm
Optical layer configured with transmissive portion excitation light and reflection another part excitation light, wherein the height H of light source to optical layer and sky
The ratio H/P and optical layer of the length P of chamber long side meets qualified relation to the single transmitance m of excitation light.So, light source
The light sent out under the action of three-dimensional reflector plate and optical layer, the corresponding light extraction region of the light source only on directive quantum dot diaphragm and
Exciting light is generated, there is no the faces where light source to reflex to other light extraction regions on quantum dot diaphragm, reduces light source
Range of exposures realizes the convergence to the hot spot of light source, meanwhile, the presence of optical layer improves the single light mixing chamber of three-dimensional reflector plate and goes out
The uniformity penetrated improves the contrast between each light extraction region of backlight module
Further, because in quantum dot film red quantum dot material and green quanta point material can under the excitation of blue light to
All directions send out feux rouges and green light so that can have a part for directive luminescent layer in feux rouges and green light that light extraction region is sent out
Light, and then other light extraction regions are reflexed to by luminescent layer, so that there are colour mixtures for the light that sends out of each light extraction region, into one
Step causes the contrast between each light extraction region of backlight module relatively low.
Therefore in another embodiment of the invention, optical layer 104 is additionally operable to the rear orientation light of reflected excitation light, specifically
For reflection feux rouges and green light.
In the embodiment of the present invention, the wave-length coverage of blue light can be 440 nanometers ~ 450 nanometers, and the wave-length coverage of feux rouges can be with
It it is 620 nanometers ~ 660 nanometers, the wave-length coverage of green light can be 525 nanometers ~ 545 nanometers.
Fig. 4 is relation schematic diagram of the reflectivity of optical layer about wavelength, and as shown in Figure 4, optical layer is for quantum dot film
The green light that piece is sent out（Assuming that the wave-length coverage of green light is 525 nanometers ~ 545 nanometers）With feux rouges（Assuming that the wave-length coverage of feux rouges is
620 nanometers ~ 660 nanometers）Reflectivity be about 100%, the reflectivity for the LED blue lights sent out is about 50%.It needs to illustrate
It is that the embodiment of the present invention is only by taking optical layer is 50% to the reflectivity of blue light as an example, and the reflectivity can be adjusted in practical application,
The selection of reflectivity can be determined according to the relationship of above-mentioned transmitance and H/P ratios, with the equal of this light extraction for ensureing light extraction region
Even property.
Fig. 5 is the structural schematic diagram of backlight module in the related technology.In the related technology, backlight module can be with when luminous
Carry out subregion dynamic control（English：Local dimming, also referred to as local dimming）, such as only control some light source luminescent.
Backlight module 30 may include the blue light source 302 being arranged on substrate 301, and be arranged in blue light source 302 far from substrate
The quantum dot diaphragm 303 of 301 side.
As shown in figure 5, the expected hot spot formed can be under the excitation for the blue light that blue light source is sent out for quantum dot diaphragm 303
For B1.However, the exciting light that quantum dot diaphragm generates can occur back scattering and form rear orientation light, and then directive substrate
It 301 and is reflected on substrate 301, again directive quantum dot diaphragm 303, the hot spot that quantum dot diaphragm is formed at this time can be
B2.As shown in Figure 5, the range for the hot spot B2 being actually formed is more than the range of the expected hot spot B1 formed, therefore in the related technology
Backlight module each light extraction region between contrast it is relatively low.
And in backlight module provided in an embodiment of the present invention, optical layer can reflect the exciting light of quantum dot diaphragm generation,
The excitation light is avoided to face where light source, greatly shortens the path of the exciting light back scattering, therefore be actually formed
Hot spot and the expected hot spot gap formed it is smaller, and then the contrast between each light extraction region can be improved.
In conclusion backlight module provided in an embodiment of the present invention includes three-dimensional reflector plate and optical layer, and the solid is anti-
Penetrating piece can be such that the angle of departure of the emergent light of light source reduces, the optical layer excitation light that partially transmitted and partially reflection source is sent out, and
The rear orientation light of reflected excitation light.So, the light that light source is sent out can be in the effect of the solid reflector plate and optical layer
Under, the corresponding light extraction region of the light source only on directive quantum dot diaphragm and generate exciting light, and in the exciting light it is backward dissipate
Penetrating light can be reflected by optical layer, and can not face where directive light source and the face where light source reflex to its on quantum dot diaphragm
His light extraction region.To reduce the colour mixture for the light that each light extraction region is sent out, each light extraction region of backlight module is improved
Between contrast.
Optionally, Fig. 6 is the structural schematic diagram of another backlight module provided in an embodiment of the present invention.As shown in fig. 6,
On the basis of Fig. 1, backlight module 10 can also include：It is arranged in light diffusing sheet of the quantum dot diaphragm 102 far from 101 side of light source
105。
It should be noted that light diffusing sheet 105 is arranged in side of the quantum dot diaphragm 102 far from light source 101, for making
The exciting light that quantum dot diaphragm 102 generates（It that is to say feux rouges and green light）And it is uniformly mixed through the blue light of quantum dot diaphragm 102
It closes.If in addition, diffuser plate be arranged between optical layer and quantum dot diaphragm, quantum dot diaphragm generate exciting light back scattering
Transmission path it is longer, and light diffusing sheet 105 is arranged in quantum dot diaphragm 102 far from light source 101 in the embodiment of the present invention
Side shortens the excitation light of the generation of quantum dot diaphragm 102 to the path of optical layer 104 so that exciting light is in optical layer 104
After reflecting, the hot spot of formation is smaller, further reduces the colour mixture between each light extraction region, improve light extraction region it
Between contrast.
Optical layer 104 in the embodiment of the present invention can send out the blue light of a part, and reflection source with transmitted light source 101
The 101 another part blue lights sent out.Three-dimensional reflector plate 103 is reflector plate, then the blue light that the part is reflected can reflex to vertical
Body reflector plate 103, and multiple reflections are carried out between three-dimensional reflector plate 103, optical layer 104 is then projected, directive amount is improved
The uniformity of the blue light of son point diaphragm 102.
Optionally, optical layer can be a transflective layer, which is configured as reflecting blue light components transmissive portion, to indigo plant
Light activated feux rouges and green light are reflected.
Optionally, optical layer may also comprise two layers or two layers or more, and the embodiment of the present invention is not construed as limiting this.It is exemplary,
When optical layer includes multilayer, as shown in fig. 6, optical layer 104 may include：First layer 1041 and the second layer 1042, and first
Layer 1041 is arranged by close to sources 101, and first layer 1041 can be used for a part of blue light that transmitted light source 101 is sent out, and reflected light
Another part blue light that source 101 is sent out；The second layer 1042 may be located remotely from the setting of light source 101, which can be with volume reflection
The rear orientation light for the exciting light that son point diaphragm 102 generates, and the blue light that transmitted light source 101 is sent out.Fig. 7 shows the second layer
Relationship of the reflectivity about wavelength, it is assumed that the wave-length coverage for the blue light that light source 101 is sent out is 440 nanometers ~ 450 nanometers, quantum
The wave-length coverage for the feux rouges that red quantum dot material in point diaphragm 102 is sent out under the excitation of the blue light is 620 nanometers ~ 660
The wave-length coverage of nanometer, the green light that green quanta point material is sent out under the excitation of the blue light is 525 nanometers ~ 545 nanometers, is such as schemed
Shown in 7, which is transmissive to the blue light, and reflects the feux rouges and green light.
Exemplary, Fig. 8 shows a kind of relationship of the reflectivity of first layer about wavelength, as shown in figure 8, the first layer can
With only to blue wave band（400 nanometers ~ 480 nanometers）Light carry out it is semi-transparent semi-reflecting, and to other wavelength except the blue wave band
Light transmitted, the blue wave band（400 nanometers ~ 480 nanometers）It may include the blue light that light source is sent out in the embodiment of the present invention
Wavelength.
Again it is exemplary, Fig. 9 shows relationship of the reflectivity about wavelength of another first layer, as shown in figure 9, this first
Layer can be to visible light wave range（380 nanometers ~ 780 nanometers）The light of interior arbitrary wavelength carries out semi-transparent semi-reflecting, the visible light wave range
（380 nanometers ~ 780 nanometers）It may include the wavelength for the blue light that light source is sent out in the embodiment of the present invention.
With continued reference to FIG. 6, backlight module 10 can also include substrate K, and substrate K can be in groove-like, light source 101
It can be arranged in the groove, that is to say that the bottom surface of the groove can be face A where light source, optical layer 104 can be arranged in base
On plate K, to be supported for optical layer 104 and other film layers being arranged on optical layer 104.
In conclusion backlight module provided in an embodiment of the present invention includes three-dimensional reflector plate and optical layer, and the solid is anti-
Penetrating piece can be such that the angle of departure of the emergent light of light source reduces, a part of light that optical layer can be sent out with transmitted light source, and reflect excitation
Another part light that the rear orientation light and light source of light are sent out.So, the light that light source is sent out can be in the solid reflector plate
Under the action of optical layer, the corresponding light extraction region of the light source only on directive quantum dot diaphragm and generate exciting light, and this swash
Rear orientation light in shining can be reflected by optical layer, and can not face where directive light source and the face amount of reflexing to where light source
Other light extraction regions on son point diaphragm.To reduce the colour mixture for the light that each light extraction region is sent out, backlight module is improved
Each light extraction region between contrast.
Figure 10 is the structural schematic diagram of another backlight module provided in an embodiment of the present invention.Shown in Fig. 1 or Fig. 6
Backlight module 10 on the basis of, backlight module can also include optical film layer.Exemplary, backlight module 90 is on the basis of Fig. 6
On can also include the optical film layer 106 that is arranged on light diffusing sheet 105.The optical film layer 106 may include：Prism film with it is anti-
Penetrate formula brightness enhancement film（English：Dual Brightness Enhance Film；Referred to as：DBEF）, which can
Improve the brightness of the light by the optical film layer 106.
The embodiment of the present invention additionally provides a kind of display device, which may include Fig. 1, Fig. 6 and Figure 10 any
Shown in backlight module.Optionally, which can also include liquid crystal display panel, which can be used for for liquid
LCD panel provides backlight.
Exemplary, which can be：Liquid crystal display device, Electronic Paper, mobile phone, tablet computer, television set, display
Any product or component with display function such as device, laptop, Digital Frame, navigator.
The foregoing is merely the alternative embodiments of the application, not to limit the application, it is all in spirit herein and
Within principle, any modification, equivalent replacement, improvement and so on should be included within the protection domain of the application.
Claims (8)
1. a kind of backlight module, the backlight module include：Multiple light sources and quantum dot diaphragm, the excitation light that the light source is sent out
Quantum dot diaphragm described in directive, and the quantum dot diaphragm is excited to generate exciting light, the exciting light is mixed with the excitation light
At white backlight, it is characterised in that：
The backlight module further includes three-dimensional reflector plate, and the solid reflector plate includes a plurality of cavities of array setting, the sky
Chamber is made of bottom surface and side, and the light source is located at the bottom surface of the cavity；
Configured with the optical layer for partially transmitted and partially reflecting the excitation light between the light source and the quantum dot diaphragm；
Wherein, the ratio H/P of the light source to the height H of the optical layer and length P of the cavity long side are 0.2≤H/P
When≤0.35, the optical layer meets 0.25≤m≤1 to the single transmitance m of the excitation light.
2. backlight module according to claim 1, the optical layer is additionally operable to reflect the rear orientation light of the exciting light.
3. backlight module according to claim 2, which is characterized in that the optical layer is a transflective layer.
4. backlight module according to claim 2, which is characterized in that the optical layer includes：The first layer of superposition and
Two layers,
Close to the light source, the first layer swashs for excitation light described in transmissive portion described in reflective portion the first layer
Light is encouraged, the second layer is used to reflect the rear orientation light of the exciting light far from the light source, the second layer.
5. according to claim 1-4 any one of them backlight modules, which is characterized in that the backlight module further includes：Setting
Diffuser plate in the side of the quantum dot diaphragm far from the light source.
6. according to claim 1-4 any one of them backlight modules, which is characterized in that the light source is blue light source, described
Quanta point material is provided in quantum dot diaphragm, the quanta point material is by red quantum dot material and green quanta point material group
At.
7. according to claim 1-4 any one of them backlight modules, which is characterized in that the top of the cavity and the optics
Certain interval is reserved between layer.
8. a kind of display device, which is characterized in that the display device includes any backlight module of claim 1 to 7.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810078975.4A CN108279532B (en) | 2018-01-26 | 2018-01-26 | Backlight module and display device |
| EP18902372.4A EP3745188B1 (en) | 2018-01-26 | 2018-06-06 | Liquid crystal display device |
| PCT/CN2018/090105 WO2019144557A1 (en) | 2018-01-26 | 2018-06-06 | Liquid crystal display device |
| US16/714,138 US10788704B2 (en) | 2018-01-26 | 2019-12-13 | Liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810078975.4A CN108279532B (en) | 2018-01-26 | 2018-01-26 | Backlight module and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108279532A true CN108279532A (en) | 2018-07-13 |
| CN108279532B CN108279532B (en) | 2019-12-03 |
Family
ID=62805354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810078975.4A Active CN108279532B (en) | 2018-01-26 | 2018-01-26 | Backlight module and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108279532B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108983499A (en) * | 2018-09-19 | 2018-12-11 | 武汉华星光电技术有限公司 | Backlight module |
| CN114002881A (en) * | 2021-06-02 | 2022-02-01 | 友达光电股份有限公司 | Backlight module |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012174371A (en) * | 2011-02-17 | 2012-09-10 | Sharp Corp | Lighting apparatus, and liquid crystal display |
| JP2012212509A (en) * | 2011-03-30 | 2012-11-01 | Sharp Corp | Lighting system and display device |
| CN104698680A (en) * | 2015-03-11 | 2015-06-10 | 青岛海信电器股份有限公司 | Module and display equipment |
| CN105425452A (en) * | 2015-12-03 | 2016-03-23 | 青岛海信电器股份有限公司 | Backlight module and display device |
| CN107532786A (en) * | 2015-05-15 | 2018-01-02 | 索尼公司 | Light-emitting device, display device and lighting device |
-
2018
- 2018-01-26 CN CN201810078975.4A patent/CN108279532B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012174371A (en) * | 2011-02-17 | 2012-09-10 | Sharp Corp | Lighting apparatus, and liquid crystal display |
| JP2012212509A (en) * | 2011-03-30 | 2012-11-01 | Sharp Corp | Lighting system and display device |
| CN104698680A (en) * | 2015-03-11 | 2015-06-10 | 青岛海信电器股份有限公司 | Module and display equipment |
| CN107532786A (en) * | 2015-05-15 | 2018-01-02 | 索尼公司 | Light-emitting device, display device and lighting device |
| CN105425452A (en) * | 2015-12-03 | 2016-03-23 | 青岛海信电器股份有限公司 | Backlight module and display device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108983499A (en) * | 2018-09-19 | 2018-12-11 | 武汉华星光电技术有限公司 | Backlight module |
| US11150509B2 (en) | 2018-09-19 | 2021-10-19 | Wuhan China Star Optoelectronics Technology Co., Ltd. | Backlight module |
| CN114002881A (en) * | 2021-06-02 | 2022-02-01 | 友达光电股份有限公司 | Backlight module |
| CN114002881B (en) * | 2021-06-02 | 2023-07-04 | 友达光电股份有限公司 | Backlight module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108279532B (en) | 2019-12-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108227305A (en) | Backlight module and display device | |
| CN106773315B (en) | Backlight module and liquid crystal display | |
| US8246235B2 (en) | Illumination system for luminaires and display device | |
| JP5540610B2 (en) | Light quantity control member, surface light source device and display device | |
| CN113126363A (en) | Display device | |
| CN108701742A (en) | Luminescence unit, display device and lighting device | |
| CN109298573A (en) | A kind of display panel and display device | |
| CN108700263A (en) | Lighting device and display device | |
| CN109001936A (en) | Light source module and display equipment | |
| US11221518B2 (en) | Backlight module and display panel | |
| EP2450742B1 (en) | Backlight source and thinning method for the same and liquid crystal device with the same | |
| CN108279532B (en) | Backlight module and display device | |
| WO2018173977A1 (en) | Backlight and backlight production method | |
| CN107894677A (en) | Quantum dot film, backlight module and liquid crystal display for backlight module | |
| CN214751236U (en) | Display device | |
| JP2023552154A (en) | Backlight module and display screen | |
| WO2019205476A1 (en) | Light source module, backlight module, and liquid crystal display device | |
| CN110456558A (en) | Optical film material, backlight and display device | |
| US10788704B2 (en) | Liquid crystal display device | |
| JP2010055999A (en) | Backlight unit and liquid crystal display device equipped with same | |
| KR20090032669A (en) | Backlight unit | |
| CN112987394B (en) | Display device | |
| CN114675451A (en) | Optical module and splicing display device | |
| US11018118B2 (en) | Backlight device and manufacturing method thereof | |
| TW201944149A (en) | Backlight module and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee after: Hisense Video Technology Co.,Ltd. Address before: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee before: HISENSE ELECTRIC Co.,Ltd. |