CN106324746A - Light guide plate, backlight module set and display device - Google Patents
Light guide plate, backlight module set and display device Download PDFInfo
- Publication number
- CN106324746A CN106324746A CN201610846388.6A CN201610846388A CN106324746A CN 106324746 A CN106324746 A CN 106324746A CN 201610846388 A CN201610846388 A CN 201610846388A CN 106324746 A CN106324746 A CN 106324746A
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- Prior art keywords
- light
- guide plate
- light guide
- scattering
- converter section
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0051—Diffusing sheet or layer
-
- 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
-
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The present invention provides a light guide plate, a backlight module set and a display device. The light guide plate includes a substrate, a scattering portion and a light conversion portion; grooves are dispersed on the first surface of the substrate; the grooves form a scattering functional structure of the scattering portion; the light conversion portion is arranged on the first surface, and the light conversion functional structure of the light conversion portion is set to a dispersed dot form; and or the scattering portion and the light conversion portion are both arranged on the first surface of the substrate, and the scattering functional structure of the scattering portion and the light conversion functional structure of the light conversion portion are set to dispersed dot forms. Since a reticular dot layer comprises the light conversion portion on the basis of the scattering portion, and a light converting material in the light conversion portion has a scattering effect, and therefore, the light conversion portion cannot only further scatter incident light entering the light guide plate, and but also can convert the incident light to compensate the brightness of emergent light, and thus, the light equalizing performance and brightness of a display device provided with the light guide plate can be improved.
Description
Technical field
The present invention relates to optical technical field, in particular to a kind of light guide plate, backlight module and display device.
Background technology
Along with the development of Display Technique, people are also more and more higher to the requirement of the image quality of display device.Mesh
Before the display device that commonly uses, owing to being limited by white LED light source spectral characteristic, colour gamut is narrower and the energy of color rendition
Power is poor.
Quanta point material has that spectrum is continuous and photochromic adjustable advantage, these advantages having due to quanta point material,
After being applied in display device by quanta point material, by increasing capacitance it is possible to increase the colour gamut of display device, thus promote image quality.
Light guide plate of the prior art is generally of scattering part, so that the emergent light of light source is scattered, but, in display
The processing technology of equipment is the light guide plate being initially formed and there is scattering part, recycles light source, light guide plate, reflecting layer, quantum dot film
Forming display device with brightness enhancement film, therefore, in above-mentioned light guide plate, the unreasonable meeting of net-pont design causes the optical of display device
Matter and luminance range.
Further, when arranging quantum dot film as the light conversion layer of backlight module, can use blue-ray LED as light source,
Make blue light be converted into white light in quantum dot film and carry out outgoing, but, in actual applications can be due to the leakage of side blue light
The image quality causing display device declines.
Summary of the invention
Present invention is primarily targeted at a kind of light guide plate of offer, backlight module and display device, to solve prior art
In be provided with the equal photosensitiveness of display device and the problem of luminance range of light guide plate.
To achieve these goals, according to an aspect of the invention, it is provided a kind of light guide plate, light guide plate includes base
Plate, scattering part and light converter section, wherein, the first surface of substrate has the groove of dispersed and distributed, and groove forms dissipating of scattering part
Penetrating functional structure, light converter section is arranged on first surface, and the light translation function structure of light converter section is with the point-like of dispersed and distributed
Form is arranged；Or scattering part and light converter section are arranged on the first surface of substrate, and the scattering function structure of scattering part and
The light translation function structure of light converter section is arranged with the point format of dispersed and distributed.
Further, first surface includes marginal zone and non-edge district, and light converter section is arranged on marginal zone.
Further, the orthographic projection of first surface is rectangle, and marginal zone includes four sub-marginal zones, at least one sub-limit
In edge district, the light that light translation function structure is at least a line dispersed and distributed conversion site of light converter section.
Further, the spacing with the light conversion site in a line is equal.
Further, identical with the size of light conversion site in a line.
Further, in each row, the size of light conversion site is successively decreased from marginal zone to the center position of first surface.
Further, the concentration of light-converting material in the conversion of the light in each row site from sub-marginal zone to first surface
Center position gradually successively decreases.
Further, scattering part is arranged in non-edge district and at least one sub-marginal zone, the scattering function knot of scattering part
Structure is scattering netted dot.
Further, scattering netted dot is arranged in non-edge district, and scattering netted dot specular is arranged.
Further, scattering netted dot and the light conversion alternately arranged setting in site of marginal zone it are arranged on.
Further, the cross section being parallel to first surface of light conversion site and scattering netted dot is independently selected from circular and just
Any one in polygon, the preferably cross section being parallel to first surface of light conversion site and scattering netted dot have identical shape
Shape, the side ratio of light conversion site and the diameter ratio of scattering netted dot or light conversion site and scattering netted dot is more than or equal to 5:1.
Further, scattering function structure includes scattering material, scattering material selected from titan oxide particles, tantalum oxide particles,
Niobium oxide granule, zirconia particles, alumina particle, tungsten oxide particles, antimony oxide particle, vanadium oxide particle, molybdenum oxide granule,
Silicon oxide particle, chrome oxide particle, ferric oxide particles, copper oxide particle, particles of lead oxide, yttria particles, manganese oxide particle,
Granules of stannic oxide, Zinc oxide particles, vulcanized lead granule, zns particle, cadmium sulfide granule, zinc telluridse granule and cadmium selenide granule
In any one or more.
Further, light translation function structure includes that light-converting material, light-converting material include quantum dot and/or non-quantum
Point fluorescent material, preferably non-quantum point fluorescent material include fluorescent material.
According to a further aspect in the invention, it is provided that a kind of backlight module, including light source, light guide plate and reflecting layer, guide-lighting
Plate has incidence surface and the first exiting surface, and light source is correspondingly arranged with incidence surface, and reflecting layer is correspondingly arranged with the first exiting surface, leads
Tabula rasa is above-mentioned light guide plate, and the first surface in light guide plate is the first exiting surface.
Further, backlight module also includes: quantum dot film, is correspondingly arranged with the first exiting surface；Brightness enhancement film, the amount of being arranged at
The side away from light guide plate of son point film.
According to a further aspect in the invention, additionally provide a kind of display device, including backlight module and be arranged at backlight
Liquid crystal panel on module, backlight module is above-mentioned backlight module.
Application technical scheme, it is provided that a kind of include substrate and be arranged at the net on a side surface of substrate
The light guide plate of some layer, owing to this site layer also includes the light in light converter section, and light converter section on the basis of including scattering part
Transition material also there is scattering process, thus utilize above-mentioned smooth converter section to be entered by the incident illumination in incident light guide plate
Row further scattering, additionally it is possible to compensate by carrying out incident illumination changing the brightness with to emergent light, and then improve and set
It is equipped with equal photosensitiveness and the brightness of the display device of this light guide plate.
In addition to objects, features and advantages described above, the present invention also has other objects, features and advantages.
Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
The Figure of description of the part constituting the present invention is used for providing a further understanding of the present invention, and the present invention shows
Meaning property embodiment and explanation thereof are used for explaining the present invention, are not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the cross-sectional view of the light guide plate that embodiment of the present invention provided；
Fig. 2 shows the plan structure schematic diagram of the light guide plate that embodiment of the present invention provided；And
Fig. 3 shows the decomposing schematic representation of the cross-section structure of the backlight module that embodiment of the present invention provided.
Wherein, above-mentioned accompanying drawing includes the following drawings labelling:
10, light source；20, light guide plate；210, substrate；220, scattering part；221, scattering netted dot；230, light converter section；231、
Light conversion site；30, reflecting layer；40, quantum dot film；50, brightness enhancement film.
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the present invention and the feature in embodiment can phases
Combination mutually.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
In order to make those skilled in the art be more fully understood that the present invention program, below in conjunction with in the embodiment of the present invention
Accompanying drawing, is clearly and completely described the technical scheme in the embodiment of the present invention, it is clear that described embodiment is only
The embodiment of a present invention part rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under not making creative work premise, all should belong to the model of present invention protection
Enclose.
It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, "
Two " it is etc. for distinguishing similar object, without being used for describing specific order or precedence.Should be appreciated that so use
Data can exchange in the appropriate case, in order to embodiments of the invention described herein.Additionally, term " includes " and " tool
Have " and their any deformation, it is intended that cover non-exclusive comprising, such as, contain series of steps or unit
Process, method, system, product or equipment are not necessarily limited to those steps or the unit clearly listed, but can include the most clear
That list to Chu or for intrinsic other step of these processes, method, product or equipment or unit.
As described in background technology, existing backlight module can use blue-ray LED as light source, make blue light exist
Quantum dot film is converted into white light and carries out outgoing, but, display can be caused due to the leakage of side blue light in actual applications
The image quality of equipment declines.Present inventor studies for the problems referred to above, it is proposed that a kind of light guide plate, such as Fig. 1
Shown in 2, light guide plate includes substrate 210, scattering part 220 and light converter section 230, and wherein, the first surface of substrate 210 has point
Dissipating the groove of distribution, groove forms the scattering function structure of scattering part 220, and light converter section 230 is arranged on first surface, and light turns
The light translation function structure changing portion 230 is arranged with the point format of dispersed and distributed；Or scattering part and light converter section 230 are arranged at
On the first surface of substrate 210, and the light translation function structure of the scattering function structure of scattering part 220 and light converter section 230 with
The point format of dispersed and distributed is arranged.Those skilled in the art can arrange the light translation function of ad-hoc location by optical design
Structure.
The light guide plate of the present invention is owing to including substrate and the site layer being arranged on a side surface of substrate, this site layer
On the basis of including scattering part, also include that the light transition net dot structure in light converter section, and light converter section also has scattering and makees
With, thus utilize above-mentioned smooth converter section to be scattered further by the incident illumination in incident light guide plate, additionally it is possible to logical
Cross and incident illumination is carried out changes the brightness with to emergent light compensate, and then improve the display device being provided with this light guide plate
Equal photosensitiveness and brightness.
In the above-mentioned light guide plate of the present invention, scattering part 220 can have two kinds of set-up modes: at the first set-up mode
In, etched the multiple grooves of formation over the substrate 210 by etching technics, using above-mentioned groove as scattering part 220, the degree of depth of groove
Can be set according to prior art with sectional area those skilled in the art；In the second set-up mode, by substrate
Arrange on 210 and multiple there is scattering material site, thus utilize above-mentioned scattering material site to be scattered light realizing leaded light
All light function of plate.
In the above-mentioned light guide plate of the present invention, it is preferable that first surface includes marginal zone and non-edge district, light converter section
230 are arranged on marginal zone.When the orthographic projection in the plane of light guide plate is rectangle, first surface has four sub-edges
District, refers respectively to the region being positioned on four limits of first surface, and on first surface in addition to the region on aforementioned four limit
Region be non-edge district.Above-mentioned light guide plate can be curved surface, it is also possible to be plane.The determination of above-mentioned marginal zone is depended on
Light leak is to brightness and uniformity influence area.
Spill owing at least one side surface of light guide plate has light, thus above-mentioned smooth converter section 230 is arranged at limit
In edge district, the incident illumination in incident light guide plate can not only be scattered further, and carry out incident illumination changing with to going out
The brightness penetrating light compensates, additionally it is possible to make the light of the light leak face outgoing from light guide plate pass through under the effect of light converter section 230
Complementary colors becomes white, thus effectively overcomes the leakage of blue light in light guide plate, improves brightness and the color of backlight module
The degree uniformity, and then it is effectively improved the image quality of the display device being provided with above-mentioned backlight module.
When above-mentioned smooth converter section 230 is arranged on the marginal zone of first surface, it is preferable that the orthographic projection of first surface is
Rectangle, the marginal zone of this first surface includes four sub-marginal zones, at least one sub-marginal zone, the light of light converter section 230
Translation function structure is the light conversion site 231 of at least a line dispersed and distributed, wherein, changes site 231 with the light in a line
Spacing is equal.By making the spacing of light conversion site 231 in light converter section 230 identical, it is effective to ensure that forward goes out light
Evenness degree and brightness.It is to be understood that described " OK " refers to that, in a sub-marginal zone, multiple sites are at straight line
On, and this straight line parallel is in the direction arrangement mode on this head of district limit, sub-edge.
Those skilled in the art can be positioned at, to above-mentioned, the light transition net that same a line intermediate reach is arranged according to the actual requirements
The size of point 231 is set.When in same a line, the spacing of each light conversion site 231 is equal, in order to be further ensured that forward
Go out evenness degree and the brightness of light, it is preferable that identical with the size of light conversion site 231 in a line.
In a preferred embodiment, equal with the spacing of each light conversion site 231 in a line, and in each row, light turns
The size of draping point 231 is successively decreased to the center position of first surface from sub-marginal zone.Further, passing through due to the emergent light of light source
Light leak intensity after light guide plate is also in graded profile, therefore, above-mentioned preferred embodiment can make each light conversion site 231 right
The light leak light intensity is answered to carry out light conversion, it is to avoid light conversion excessively causes colourity and brightness disproportionation.
In another preferred embodiment, equal with the spacing of each light conversion site 231 in a line, and in each row
The concentration of the light-converting material in light conversion site 231 is gradually successively decreased to the center position of first surface from sub-marginal zone.Above-mentioned
The arrangement mode of middle concentration gradient, by the principle identical with the arrangement mode of size gradual change, makes each light turn
The corresponding light leak light intensity of draping point 231 carries out light conversion, it is to avoid light conversion excessively causes colourity and brightness disproportionation.In like manner, on
The light leak intensity stating each sub-marginal zone is likely to difference, equally takes to be controlled the concentration of light-converting material.
When above-mentioned smooth converter section 230 is arranged at least one sub-marginal zone of first surface, the most real in one
Executing in mode, scattering part 220 is arranged in non-edge district and at least one sub-marginal zone, the scattering function structure of scattering part 220
For scattering netted dot 221.Above-mentioned preferred embodiment can not only ensure that light converter section 230 realizes above-mentioned effect, additionally it is possible to
Scattering part 220 is made to realize the scattering efficiency higher to incident illumination in light guide plate.In order to avoid scattering part 220 is to light converter section 230
Impact, it is further preferable that be arranged on one of first surface, two or three sub-marginal zones when above-mentioned smooth converter section 230
Time, above-mentioned scattering part 220 is arranged on the sub-marginal zone in addition to above-mentioned sub-marginal zone.
Similarly, in order to avoid the scattering part 220 impact on light converter section 230, when above-mentioned smooth converter section 230 is arranged at
Time at least one sub-marginal zone on one surface, in another preferred embodiment, scattering part 220 is arranged on non-edge district
In.Now, the light converter section 230 being arranged on marginal zone will not be impacted by the scattering part 220 being arranged on non-edge district, from
And light converter section 230 can be arranged on any marginal zone of first surface.
When scattering part 220 can be simultaneously located on marginal zone and non-edge district, it is also possible to be provided only on non-edge district
On.Preferably, scattering netted dot 221 is arranged on non-edge district, and scattering netted dot 221 specular is arranged；Further, in order to reduce scattering
Influencing each other between portion 220 and light converter section 230, it is preferable that be arranged on scattering netted dot 221 and the light conversion site of marginal zone
231 alternately arranged settings.
The size of above-mentioned scattering netted dot 221 can be carried out by those skilled in the art according to the size of light conversion site 231
Setting, the shape of site can be arbitrary.Preferably, light conversion site and scattering netted dot 221 be parallel to first surface
Cross section is independently selected from any one in circle and regular polygon；It is further preferable that light conversion site 231 and scattering netted dot 221
The cross section being parallel to first surface be of similar shape, light conversion site 231 and the diameter ratio of scattering netted dot 221 or light turn
The side ratio of draping point 231 and scattering netted dot 221 is more than or equal to 5:1.Owing to being positioned at the chi of the scattering netted dot 221 at the light guide plate back side
Very little can do the least, therefore, above-mentioned preferred embodiment ensure that light conversion site 231 there is relatively large chi
Very little, thus ensure that the light transfer capability of light conversion site 231.
In the above-mentioned light guide plate of the present invention, when groove forms the scattering function structure of scattering part 220, in order to make scattering
Portion 220 realizes higher scattering efficiency, it is preferable that scattering function structure includes scattering material, and scattering material is selected from titanium oxide
Grain, tantalum oxide particles, niobium oxide granule, zirconia particles, alumina particle, tungsten oxide particles, antimony oxide particle, vanadium oxide
Grain, molybdenum oxide granule, silicon oxide particle, chrome oxide particle, ferric oxide particles, copper oxide particle, particles of lead oxide, yittrium oxide
Grain, manganese oxide particle, granules of stannic oxide, Zinc oxide particles, vulcanized lead granule, zns particle, cadmium sulfide granule, zinc telluridse
Grain and any one or more in cadmium selenide granule；It is further preferable that the particle diameter of above-mentioned scattering material is 100～600nm.
In the above-mentioned light guide plate of the present invention, light translation function structure includes light-converting material, it is also possible to comprise curable
Fluoropolymer resin.In order to ensure that the scattering power of light conversion site 231, it is preferable that light translation function structure light conversion merit
The refractive index of energy structure is 1～4；Further, in order to make light conversion site 231 have higher scattering power and light transformation energy simultaneously
Power, it is preferable that light translation function structure includes that light-converting material, light-converting material include quantum dot and/or non-quantum point fluorescence
Material, it is further preferable that non-quantum point fluorescent material includes fluorescent material.Light-converting material can also is that quantum dot and curable poly-
The quantum dot microsphere that compound is formed, can be fluorescent material and the fluorescent material microsphere of curable polymer formation.
According to a further aspect in the invention, it is provided that a kind of backlight module, as it is shown on figure 3, include light source 10, light guide plate 20
With reflecting layer 30, light guide plate 20 has incidence surface and the first exiting surface, and light source 10 is correspondingly arranged with incidence surface, and reflecting layer 30 with
First exiting surface is correspondingly arranged, and light guide plate 20 is above-mentioned light guide plate 20, and the first surface in light guide plate 20 is the first exiting surface.
Owing to the light guide plate in above-mentioned backlight module includes substrate and the site layer being arranged on a side surface of substrate,
This site layer also includes the also tool of the light translation function structure in light converter section, and light converter section on the basis of including scattering part
There is scattering process, thus after above-mentioned light guide plate is applied to backlight module, it is possible to utilize above-mentioned smooth converter section by incidence light guide plate
In incident illumination scatter further, and compensate by carrying out incident illumination changing the brightness with to emergent light, and then
Improve equal photosensitiveness and the brightness of the display device being provided with this backlight module.
In the above-mentioned backlight module of the present invention, light source 10 can be Ordinary Light Sources Have of the prior art, including blue light and
White light in addition to blue light.Preferably, the emergent light of above-mentioned light source 10 is set as blue light, on the one hand, owing to making light guide plate
20 have light converter section 230, so that the blue light entering light converter section 230 from the light leak face of light guide plate 20 can exciting light conversion
Material and send gold-tinted, blue light and gold-tinted are mixed to form white light, and then effectively reduce the leakage of blue light in backlight module；Separately
On the one hand, owing to the harm of blue light is low, energy-conservation and colour gamut is high, use blue light can also reduce the energy of backlight module as light source 10
Consumption.Above-mentioned reflecting layer 30 is used for be reflected back in light guide plate 20 corresponding to the emergent light of side, reflecting layer 30 from light guide plate 20, from
And improve the light extraction efficiency of backlight module.
Above-mentioned backlight module can also include: quantum dot film 40, is correspondingly arranged with the first exiting surface；Brightness enhancement film 50, is arranged
The side away from light guide plate 20 in quantum dot film 40.When the emergent light of light source 10 is blue light, above-mentioned quantum dot film 40 is used for
Convert blue light into white light；Above-mentioned brightness enhancement film 50 is for converging from the light of quantum dot film 40 outgoing, thus improves the back of the body
The emitting brightness of light module.
According to a further aspect in the invention, it is provided that a kind of display device, including backlight module and be arranged at backlight mould
Liquid crystal panel in group, and backlight module is above-mentioned backlight module.Owing to the light guide plate in above-mentioned display device includes substrate
And the site layer being arranged on a side surface of substrate, this site layer also includes that on the basis of including scattering part light is changed
Light translation function structure in portion, and light converter section also there is scattering process, thus above-mentioned light guide plate is applied to backlight mould
After group, it is possible to utilize above-mentioned smooth converter section to be scattered further by the incident illumination in incident light guide plate, and by by incident illumination
Carry out changing the brightness with to emergent light to compensate, and then improve the equal photosensitiveness of the display device being provided with this backlight module
And brightness.
The light guide plate that the application provides is further illustrated below in conjunction with embodiment and comparative example.
Embodiment 1
The light guide plate that the present embodiment provides includes substrate, scattering part and light converter section, and the first surface of substrate has dispersion
The groove of distribution, groove forms the scattering function structure of scattering part, and light converter section is arranged on first surface, the light of light converter section
Translation function structure is arranged with the point format of dispersed and distributed, first surface be divided into the first sub-marginal zone, the second sub-marginal zone, the
Three sub-marginal zones, the 4th sub-marginal zone and non-edge district, light converter section is arranged on four sub-marginal zones, and scattering part is arranged on non-limit
In edge district.
The light conversion site having a line to be spacedly distributed on each sub-marginal zone, light conversion site and scattering groove site
The cross section being parallel to first surface is circle, and light changes the diameter of site and circular groove scattering function structure than into 5:1.Shape
Become light translation function structure material be emission wavelength be CdSe/ZnS core-shell quanta dots and the silica column substrate of 570nm, its
The concentration of middle quantum dot is identical.
Wherein, substrate is PMMA substrate, and the light transmittance of the light guide plate before being not provided with light converter section is 95%, brightness uniformity
Degree is 90%.
Embodiment 2
The light guide plate that the present embodiment provides includes that substrate, scattering part and light converter section, scattering part and light converter section are respectively provided with
On the first surface of light guide plate, and the light translation function structure of the scattering function structure of scattering part and light converter section is with dispersion point
The point format of cloth is arranged, and first surface is divided into the first sub-marginal zone, the second sub-marginal zone, the 3rd sub-marginal zone, the 4th sub-limit
Edge district and non-edge district, light converter section is arranged on four sub-marginal zones, and scattering part is arranged in non-edge district.
The light conversion site that a line is spacedly distributed is set on each sub-marginal zone, non-edge district is arranged and is spacedly distributed
Scattering netted dot, light conversion site and the cross section being parallel to first surface of scattering netted dot be circle, light conversion site and dissipating
Penetrate the diameter of site than for 10:1.Formed light translation function structure material be emission wavelength be the CdSe/ZnS nucleocapsid of 570nm
Quantum dot and silica column substrate, wherein the concentration of quantum dot is identical.
Wherein, substrate is PMMA substrate, and the material forming scattering function structure is titan oxide particles, is being not provided with light conversion
Before portion and the light transmittance of the light guide plate that is provided with scattering netted dot is 95%, luminance uniformity is 90%.
Embodiment 3
The light guide plate that the present embodiment provides is with the difference of embodiment 2:
Light converter section is arranged on four sub-marginal zones, and scattering part is arranged in non-edge district and identical with light converter section
Four sub-marginal zones on, the scattering netted dot that each sub-marginal zone has a line to be spacedly distributed, be arranged on the scatternet of marginal zone
Point and light change the alternately arranged setting in site.
Embodiment 4
The light guide plate that the present embodiment provides is with the difference of embodiment 2:
In each sub-marginal zone, the light translation function structure of light converter section is the light transition net that two row are spacedly distributed
Point, in two row, the size of each light conversion site is identical.
Embodiment 5
The light guide plate that the present embodiment provides is with the difference of embodiment 4:
In each row, light conversion site size from sub-marginal zone to the center position of first surface with 30% ratio successively
Successively decrease.
Embodiment 6
The light guide plate that the present embodiment provides is with the difference of embodiment 4:
Light in each row changes the concentration of the light-converting material in site from sub-marginal zone to the center position of first surface
Successively decrease successively with the ratio of 30%.
Comparative example 1
The light guide plate that this comparative example provides includes substrate and scattering part, and scattering part includes the scattering netted dot being spacedly distributed,
Wherein, substrate is PMMA substrate, and the material forming scattering function structure is titan oxide particles, before being not provided with light converter section and set
The light transmittance of the light guide plate being equipped with scattering netted dot is 95%, and luminance uniformity is 90%.
The light guide plate being utilized respectively in above-described embodiment 1 to 6 and comparative example 1 makes backlight module, and to above-mentioned backlight mould
Uniformity of chromaticity and the brightness of group are tested, and choose equally spaced 3 × 3 points, and CIE-x deviation value=CIE-x maximum-
CIE-x minima, CIE-y deviation value=CIE-y maximum-CIE-y minima, the brightness in the point of luminance uniformity=9 is
Brightness maxima in/9 points of big value, (x, y) and CIE (x', y') is chromaticity coordinate value, wherein back light is blue light to CIE
LED, test result such as following table:
From above-mentioned test result it can be seen that utilize the backlight module that above-described embodiment 1 to 6, light guide plate makes, its color
Degree uniformity is all significantly improved compared with comparative example 1 with brightness.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect:
1, above-mentioned smooth converter section is utilized to be scattered further by the incident illumination in incident light guide plate, additionally it is possible to
Compensate by carrying out incident illumination changing the brightness with to emergent light, and then improve and be provided with the display of this light guide plate and set
Standby equal photosensitiveness and brightness；
2, above-mentioned smooth converter section is arranged on marginal zone, additionally it is possible to make the light of the light leak face outgoing from light guide plate turn at light
Change and become white by complementary colors under the effect in portion, thus effectively overcome the leakage of blue light in light guide plate, improve the back of the body
The brightness of light module and evenness degree, and then it is effectively improved the one-tenth picture element of the display device being provided with above-mentioned backlight module
Amount.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, that is made any repaiies
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (16)
1. a light guide plate, it is characterised in that light guide plate includes substrate (210), scattering part (220) and light converter section (230), its
In,
The first surface of described substrate (210) has the groove of dispersed and distributed, and described groove forms dissipating of described scattering part (220)
Penetrating functional structure, described smooth converter section (230) is arranged on described first surface, the light conversion merit of described smooth converter section (230)
Can structure arrange with the point format of dispersed and distributed；Or
Described scattering part (220) and described smooth converter section (230) are arranged on the first surface of described substrate (210), and institute
State the scattering function structure of scattering part (220) and the light translation function structure of described smooth converter section (230) point with dispersed and distributed
Shape form is arranged.
Light guide plate the most according to claim 1, it is characterised in that described first surface includes marginal zone and non-edge district,
Described smooth converter section (230) is arranged on described marginal zone.
Light guide plate the most according to claim 2, it is characterised in that the orthographic projection of described first surface is rectangle, described limit
Edge district includes four sub-marginal zones, on marginal zone sub-at least one described, and the light translation function knot of described smooth converter section (230)
Structure is light conversion site (231) of at least a line dispersed and distributed.
Light guide plate the most according to claim 3, it is characterised in that change between site (231) with the described light in a line
Away from equal.
Light guide plate the most according to claim 3, it is characterised in that the size of light conversion site (231) in described same a line
Identical.
Light guide plate the most according to claim 3, it is characterised in that in described each row light conversion site (231) size from
Successively decrease to the center position of described first surface in described marginal zone.
Light guide plate the most according to claim 3, it is characterised in that the light in light conversion site (231) in described each row
The concentration of transition material is gradually successively decreased to the center position of described first surface from described sub-marginal zone.
Light guide plate the most according to claim 3, it is characterised in that described scattering part (220) is arranged on described non-edge district
With at least one described in sub-marginal zone, the scattering function structure of described scattering part (220) is scattering netted dot (221).
Light guide plate the most according to claim 8, it is characterised in that described scattering netted dot (221) is arranged on described non-edge
Qu Shang, described scattering netted dot (221) specular is arranged.
Light guide plate the most according to claim 8, it is characterised in that be arranged on the described scattering netted dot of described marginal zone
(221) and described light conversion site (231) alternately arranged setting.
11. light guide plates according to claim 8, it is characterised in that described light conversion site (231) and described scattering netted dot
(221) the cross section being parallel to described first surface is independently selected from any one in circle and regular polygon, the most described light
The cross section being parallel to described first surface of conversion site (231) and described scattering netted dot (221) is of similar shape, described
Light conversion site (231) and the diameter ratio of described scattering netted dot (221) or described light change site (231) and described scattering netted dot
(221) side ratio is more than or equal to 5:1.
12. light guide plates according to claim 1, it is characterised in that described scattering function structure includes scattering material, described
Scattering material is selected from titan oxide particles, tantalum oxide particles, niobium oxide granule, zirconia particles, alumina particle, tungsten oxide
Grain, antimony oxide particle, vanadium oxide particle, molybdenum oxide granule, silicon oxide particle, chrome oxide particle, ferric oxide particles, copper oxide
Grain, particles of lead oxide, yttria particles, manganese oxide particle, granules of stannic oxide, Zinc oxide particles, vulcanized lead granule, zinc sulfide
Grain, cadmium sulfide granule, zinc telluridse granule and any one or more in cadmium selenide granule.
13. light guide plates according to claim 1, it is characterised in that described smooth translation function structure includes light-converting material,
Described light-converting material includes quantum dot and/or non-quantum point fluorescent material, and the most described non-quantum point fluorescent material includes glimmering
Light powder.
14. 1 kinds of backlight modules, including light source (10), light guide plate (20) and reflecting layer (30), described light guide plate (20) have into
Bright finish and the first exiting surface, described light source (10) is correspondingly arranged with described incidence surface, and described reflecting layer (30) and described first
Exiting surface is correspondingly arranged, it is characterised in that described light guide plate (20) is the light guide plate according to any one of claim 1 to 13
(20), the first surface in described light guide plate (20) is the first exiting surface.
15. backlight modules according to claim 14, it is characterised in that described backlight module also includes:
Quantum dot film (40), is correspondingly arranged with described first exiting surface；
Brightness enhancement film (50), is arranged at the side away from described light guide plate (20) of described quantum dot film (40).
16. 1 kinds of display devices, including backlight module and be arranged at the liquid crystal panel on described backlight module, its feature exists
In, described backlight module is the backlight module described in claims 14 or 15.
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| CN201610846388.6A CN106324746B (en) | 2016-09-23 | 2016-09-23 | Light guide plate, backlight module and display device |
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| CN201610846388.6A CN106324746B (en) | 2016-09-23 | 2016-09-23 | Light guide plate, backlight module and display device |
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| CN107327747A (en) * | 2017-06-26 | 2017-11-07 | 青岛海信电器股份有限公司 | A kind of backlight module and display device |
| CN113805384A (en) * | 2020-12-31 | 2021-12-17 | 友达光电股份有限公司 | Backlight module |
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| CN106324746B (en) | 2019-08-30 |
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