CN108279532B - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
- Publication number
- CN108279532B CN108279532B CN201810078975.4A CN201810078975A CN108279532B CN 108279532 B CN108279532 B CN 108279532B CN 201810078975 A CN201810078975 A CN 201810078975A CN 108279532 B CN108279532 B CN 108279532B
- Authority
- CN
- China
- Prior art keywords
- light
- backlight module
- light source
- quantum dot
- layer
- 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.)
- Active
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 field of display technology.The backlight module includes: multiple light sources and quantum dot diaphragm, the excitation light excitation quantum dot diaphragm that light source issues generates exciting light, and backlight module further includes three-dimensional reflector plate, and three-dimensional reflector plate includes a plurality of cavities of array setting, 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 issued present application addresses each output optical zone domain of backlight module there are colour mixture, the lower problem of contrast between each output optical zone domain improves the contrast between each output optical zone domain.The application is for providing backlight.
Description
Technical field
This application involves field of display technology, in particular to a kind of backlight module and display device.
Background technique
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 output optical zone domain 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), using under straight
Backlight is divided into multiple independent control units by formula LED backlight mould group.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 output optical zone domains correspondingly multiple LED.Each
LED can issue blue light to its corresponding output optical zone domain.It should be noted that being provided with red quantum in each output optical zone domain
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 issues feux rouges and green light, so that each output optical zone domain issues 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, the brightness of adjacent output optical zone domain has certain influence, causes the contrast between each output optical zone domain of backlight module relatively low.
Summary of the invention
This application provides a kind of backlight module and display device, can solve contrast between each output optical zone domain 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, institute
Quantum dot diaphragm described in the excitation light directive of light source sending is stated, and the quantum dot diaphragm is excited to generate exciting light, the excitation
Light and the excitation light are mixed into white backlight, it is characterised in that: the backlight module further includes three-dimensional reflector plate, the solid
Reflector plate 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 cavity
Bottom surface；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 the length P of the cavity long side be 0.2≤H/P≤
When 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.
Technical solution provided by the present application has the benefit that
This application provides a kind of backlight module and display device, backlight module includes three-dimensional reflector plate, three-dimensional reflector plate
A plurality of cavities including 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
Configured with partially transmitted and partially reflecting the optical layer of the excitation light between diaphragm, wherein the height H of light source to optical layer and
The ratio H/P and optical layer of the length P of cavity long side meets qualified relation to the single transmitance m of excitation light.So, light
The light that source issues is under the action of three-dimensional reflector plate and optical layer, the only corresponding output optical zone domain of the light source on directive quantum dot diaphragm
And exciting light is generated, other output optical zone domains on quantum dot diaphragm are reflexed to there is no the face where light source, reduce light source
The range of exposures of (such as LED) realizes the convergence to the hot spot of light source, meanwhile, the presence of optical layer improves three-dimensional reflector plate list
The uniformity of a light mixing chamber emergent light improves the contrast between each output optical zone domain of backlight module.
Detailed description of the invention
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 drawings in the following description are only some examples of the present application, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
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 is a kind of unused optical layer provided in an embodiment of the present invention；
Fig. 2 b is a kind of brightness curve figure 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 is a kind of brightness curve figure 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 embodiment
To keep the purposes, technical schemes and advantages 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 output optical zone domain 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 region.
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
It may include: multiple light sources 101 and quantum dot diaphragm 102, the excitation light directive quantum dot diaphragm 102 that light source 101 issues, and swash
It sends out quantum dot diaphragm 102 and generates exciting light, the excitation light that the exciting light and light source 101 issue can be mixed into white backlight.
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.Three-dimensional reflector plate 103 is used for the excitation light issued to light source 101
It is reflected.
Optical layer 104 is additionally provided between light source 101 and quantum dot diaphragm 102, which swashs light source sending
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
Multiple reflections light mixing can occur in cavity for the excitation light that the part reflex of effect and optical layer issues light source, so that
Emergent light is more uniform.
In order to guarantee 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≤0.35,104 pairs of optical layer excitations
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 where 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 sharp
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 issue blue light, and multiple light source can be set on the A of face, can be set where light source in quantum dot diaphragm 102
There is quanta point material, which can be formed and (not marked in Fig. 1 by red quantum dot material and green quanta point material
Quanta point material), red quantum dot material can issue feux rouges, green quantum dot under the excitation for the blue light that light source 101 issues
Material can issue green light under the excitation of the blue light.
Quantum dot diaphragm 102 may include with the one-to-one output optical zone domain of multiple light sources 101, when needing to control quantum dot
When certain output optical zone domain of diaphragm 102 shines, it can control the corresponding light source 101 in the output optical zone domain and issue blue light, so that should
Output optical zone domain generates exciting light under the excitation of the blue light.If the blue light that each light source issues only the directive light source it is corresponding go out light
Region, then the light that each light source issues will not interfere with each other, and then the contrast between each output optical zone domain can be improved.
As shown in Figure 1, light source 101 is placed on the bottom surface of cavity 103h, the excitation light that light source issues 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
Light mixing 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 is 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 is the brightness curve figure of light receiving surface when optical layer is not used, shown in Fig. 2 b altogether two it is bright
Write music line (respectively brightness curve x1 and brightness curve y1), line segment a1, brightness curve y1 in brightness curve x1 corresponding diagram 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 conductor
The abscissa of point indicated by abscissa identical with the abscissa in a1, 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 is using the optical layer (ratio of the length P of the cavity long side of the height H and three-dimensional reflector plate of light source to 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, coordinate system in Fig. 3 a can be the coordinate system established in the light receiving surface.Light when Fig. 3 b is using optical layer connects
By the brightness curve figure in face, shown altogether two brightness curves (respectively brightness curve x2 and brightness curve y2) in Fig. 3 b, it is bright
Line segment b2 in line segment a2 in line x2 corresponding diagram of writing music 3a, brightness curve y2 corresponding diagram 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 point indicated by abscissa identical with the abscissa, brightness in Fig. 3 a middle conductor a2
The abscissa of certain point on curve y2 is used to indicate ordinate point identical with the abscissa in Fig. 3 a middle conductor 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 back
The contrast in each output optical zone domain 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, certain interval is reserved between the cavity top and optical layer 104 of three-dimensional reflector plate 103, is protected with this
The light of card cavity top corresponding region is evenly distributed, and avoids blackening occur in this region, guarantees 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 and sky of light source to optical layer
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 of sending under the action of three-dimensional reflector plate and optical layer, only on directive quantum dot diaphragm the corresponding output optical zone domain of the light source and
Exciting light is generated, there is no the faces where light source to reflex to other output optical zone domains 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 output optical zone domain of backlight module.
Further, because the red quantum dot material in quantum dot film can be in the excitation of blue light with green quanta point material
It is lower to issue feux rouges and green light to all directions, so that can have the one of directive luminescent layer in feux rouges and green light that output optical zone domain issues
Part light, and then other output optical zone domains are reflexed to by luminescent layer, so that the light that issues of each output optical zone domain is there are colour mixture,
The contrast further resulted between each output optical zone domain of backlight module is relatively low.
Therefore in another embodiment of the invention, optical layer 104 is also used 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 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 (assuming that the wave-length coverage of green light is 525 nanometers ~ 545 nanometers) that piece issues is with feux rouges (assuming that the wave-length coverage of feux rouges is
620 nanometers ~ 660 nanometers) reflectivity be about 100%, be about 50% for the LED reflectivity of blue light issued.It needs to illustrate
It is that the embodiment of the present invention is only by taking reflectivity of the optical layer to blue light is 50% as an example, and the reflectivity is adjustable in practical application,
The selection of reflectivity can be determined according to the relationship of above-mentioned transmitance and H/P ratio, with the equal of this light out for guaranteeing output optical zone domain
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
Subregion dynamic control (English: local dimming, also referred to as local dimming) is carried out, such as only controls 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 issues 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 greater than the range of the expected hot spot B1 formed, therefore in the related technology
Backlight module each output optical zone domain between contrast it is lower.
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 output optical zone domain 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 issues, and
The rear orientation light of reflected excitation light.So, the light that light source issues can be in the effect of the solid reflector plate and optical layer
Under, only on directive quantum dot diaphragm the corresponding output optical zone domain of the light source 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 output optical zone domain.To reduce the colour mixture for the light that each output optical zone domain issues, each output optical zone domain 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, In
On the basis of Fig. 1, backlight module 10 can also include: that light diffusing sheet of the quantum dot diaphragm 102 far from 101 side of light source is arranged in
105。
It should be noted that side of the quantum dot diaphragm 102 far from light source 101 is arranged in light diffusing sheet 105, be used for so that
The exciting light (that is to say feux rouges and green light) and uniformly mixed through the blue light of quantum dot diaphragm 102 that quantum dot diaphragm 102 generates
It closes.In addition, if diffuser plate is arranged between optical layer and quantum dot diaphragm, the exciting light back scattering that quantum dot diaphragm generates
Transmission path it is longer, and quantum dot diaphragm 102 is arranged in far from light source 101 in light diffusing sheet 105 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 output optical zone domain, improve output optical zone domain it
Between contrast.
Optical layer 104 in the embodiment of the present invention can issue the blue light of a part, and reflection source with transmitted light source 101
The 101 another part blue lights issued.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 of the sending of transmitted light source 101, and reflected light
Another part blue light that source 101 issues；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 issues.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 issues is 440 nanometers ~ 450 nanometers, quantum
The wave-length coverage for the feux rouges that red quantum dot material in point diaphragm 102 issues under the excitation of the blue light is 620 nanometers ~ 660
Nanometer, the wave-length coverage for the green light that green quanta point material issues under the excitation of the blue light are 525 nanometers ~ 545 nanometers, are 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 about wavelength of first layer, as shown in figure 8, the first layer can
It is semi-transparent semi-reflecting with the light progress only to blue wave band (400 nanometers ~ 480 nanometers), and to other wavelength except the blue wave band
Light transmitted, the blue wave band (400 nanometers ~ 480 nanometers) may include in the embodiment of the present invention light source issue blue light
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 carry out semi-transparent semi-reflecting, the visible light wave range to the light of wavelength any in visible light wave range (380 nanometers ~ 780 nanometers)
(380 nanometers ~ 780 nanometers) may include the wavelength for the blue light that light source issues 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 set in the groove, that is to say that the bottom surface of the groove can be set for face A where light source, optical layer 104 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 issued with transmitted light source, and reflect excitation
Another part light that the rear orientation light and light source of light issue.So, the light that light source issues can be in the solid reflector plate
Under the action of optical layer, only on directive quantum dot diaphragm the corresponding output optical zone domain of the light source 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 output optical zone domains on son point diaphragm.To reduce the colour mixture for the light that each output optical zone domain issues, backlight module is improved
Each output optical zone domain 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 and 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 invention also 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 with are as follows: liquid crystal display device, Electronic Paper, mobile phone, tablet computer, television set, display
Any products or components having a 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 be should be included within the scope of protection of this application.
Claims (8)
1. a kind of backlight module, the backlight module includes: multiple light sources and quantum dot diaphragm, the excitation light that the light source issues
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 also used 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 and of superposition
Two layers,
Close to the light source, the first layer swashs the first layer for excitation light described in transmissive portion, and described in reflective portion
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. backlight module according to claim 1-4, which is characterized in that the backlight module further include: setting
Diffuser plate in the side of the quantum dot diaphragm far from the light source.
6. backlight module according to claim 1-4, 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. backlight module according to claim 1-4, 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 |
| PCT/CN2018/090105 WO2019144557A1 (en) | 2018-01-26 | 2018-06-06 | Liquid crystal display device |
| EP18902372.4A EP3745188B1 (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 CN108279532A (en) | 2018-07-13 |
| CN108279532B true 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) |
Families Citing this family (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 |
| TWI785631B (en) * | 2021-06-02 | 2022-12-01 | 友達光電股份有限公司 | Backlight module |
Family Cites Families (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 |
| EP4123365A1 (en) * | 2015-05-15 | 2023-01-25 | Sony Group Corporation | Light-emitting device, display apparatus, and lighting apparatus |
| 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 |
-
2018
- 2018-01-26 CN CN201810078975.4A patent/CN108279532B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108279532A (en) | 2018-07-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108227305A (en) | Backlight module and display device | |
| JP5085864B2 (en) | Backlight system and liquid crystal display device employing the same | |
| CN106773315B (en) | Backlight module and liquid crystal display | |
| US7543965B2 (en) | Side light-emitting device, backlight unit having the side light-emitting device, and liquid crystal display apparatus employing the backlight unit | |
| US20060077692A1 (en) | Backlight unit and liquid crystal display apparatus employing the same | |
| CN113126363A (en) | Display device | |
| CN104516149B (en) | A kind of liquid crystal display panel and display device | |
| WO2017154799A1 (en) | Lighting device and display device | |
| TW201219925A (en) | Backlight unit and display apparatus using the same | |
| JP2010277986A (en) | Planar lighting device and liquid crystal display with the same | |
| JP2010272245A (en) | Backlight unit and liquid crystal display equipped with this | |
| EP2067065A2 (en) | Illumination system, luminaire and display device | |
| WO2015081692A1 (en) | Light guide plate, backlight source and liquid crystal display apparatus | |
| JP2006202533A (en) | Lighting system | |
| CN109001936A (en) | Light source module and display equipment | |
| WO2018066209A1 (en) | Light emitting device, display device, and illuminating device | |
| JP2011517040A (en) | LIGHTING SYSTEM, BACKLIGHT SYSTEM, AND DISPLAY DEVICE | |
| EP2450742B1 (en) | Backlight source and thinning method for the same and liquid crystal device with the same | |
| CN108279532B (en) | Backlight module and display device | |
| US20230097447A1 (en) | Backlight module and display device | |
| CN107894677A (en) | Quantum dot film, backlight module and liquid crystal display for backlight module | |
| JP2023552154A (en) | Backlight module and display screen | |
| CN214751236U (en) | Display device | |
| WO2019205476A1 (en) | Light source module, backlight module, and liquid crystal display device | |
| US10732457B2 (en) | Backlight module and display device having transparent substrate with a plurality of light source disposed thereon |
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 |
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. |
|
| CP01 | Change in the name or title of a patent holder |