CN106324746B - Light guide plate, backlight module and display device - Google Patents
Light guide plate, backlight module and display device Download PDFInfo
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- CN106324746B CN106324746B CN201610846388.6A CN201610846388A CN106324746B CN 106324746 B CN106324746 B CN 106324746B CN 201610846388 A CN201610846388 A CN 201610846388A CN 106324746 B CN106324746 B CN 106324746B
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- 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 kind of light guide plate, backlight module and display devices.The light guide plate includes substrate, scattering part and light converter section, wherein, the first surface of substrate has the groove of dispersed distribution, and groove forms the scattering function structure of scattering part, light converter section is set on first surface, and the light conversion function structure of light converter section is arranged with the point format of dispersed distribution；Or scattering part and light converter section are respectively provided on the first surface of the substrate, and the scattering function structure of scattering part and the light conversion function structure of light converter section are arranged with the point format of dispersed distribution.Since site layer further includes light converter section on the basis of including scattering part, and the light conversion material in light converter section also has scattering process, to which the incident light in incident light guide plate further can not only be scattered using light converter section, it can also be compensated by converting incident light with the brightness to emergent light, and then improve equal photosensitiveness and the brightness of the display equipment for being provided with the light guide plate.
Description
Technical field
The present invention relates to optical technical fields, in particular to a kind of light guide plate, backlight module and display device.
Background technique
With the continuous development of display technology, requirement of the people to the image quality of display equipment is also higher and higher.Mesh
The preceding display equipment generally used, due to being limited by white LED light source spectral characteristic, colour gamut is relatively narrow and the energy of color rendition
Power is poor.
Quanta point material has the advantages that spectrum is continuous and photochromic adjustable, due to these advantages that quanta point material has,
After quanta point material is applied in display equipment, the colour gamut of display equipment can be increased, to promote image quality.
Light guide plate in the prior art usually has scattering part, and the emergent light of light source is scattered, however, showing
It is to be initially formed the light guide plate with scattering part in the manufacture craft of equipment, recycles light source, light guide plate, reflecting layer, quantum dot film
Display equipment is formed with brightness enhancement film, therefore, the unreasonable of net-pont design will lead to the optical of display equipment in above-mentioned light guide plate
Matter and luminance range.
Also, when light conversion layer of the quantum dot film as backlight module is arranged, blue-ray LED can be used as light source,
Make blue light be converted into white light in quantum dot film to be emitted, however, in practical applications can be due to the leakage of side blue light
Lead to the image quality decline for showing equipment.
Summary of the invention
The main purpose of the present invention is to provide a kind of light guide plate, backlight module and display devices, to solve the prior art
In the problem of being provided with the equal photosensitiveness of display equipment and luminance range of light guide plate.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of light guide plate, light guide plate include base
Plate, scattering part and light converter section, wherein the first surface of substrate has the groove of dispersed distribution, and groove forms dissipating for scattering part
Functional structure is penetrated, light converter section is set on first surface, and the light conversion function structure of light converter section is with the dotted of dispersed distribution
Form setting；Or scattering part and light converter section are respectively provided on the first surface of the substrate, and the scattering function structure of scattering part and
The light conversion function structure of light converter section is arranged with the point format of dispersed distribution.
Further, first surface includes marginal zone and non-edge area, 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- side
In edge area, the light conversion function structure of light converter section is the light conversion site of at least a line dispersed distribution.
Further, equal with the spacing of the light conversion site in a line.
Further, identical with the light conversion size of site in a line.
Further, the size of light conversion site is successively decreased from marginal zone to the center position of first surface in each row.
Further, the concentration of the light conversion material in the light conversion site in each row is from sub- marginal zone to first surface
Center position gradually successively decreases.
Further, scattering part setting is in non-edge area 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 area, the setting of scattering netted dot mirror symmetry.
Further, the scattering netted dot and light conversion site that marginal zone is arranged in are alternately arranged setting.
Further, light conversion site and the section for being parallel to first surface of scattering netted dot are independently selected from circle and just
The section shape having the same for being parallel to first surface of the conversion of any one of polygon, preferably light site and scattering netted dot
Shape, light converts diameter ratio or light the conversion site of site and scattering netted dot and the side ratio of scattering netted dot is more than or equal to 5:1.
Further, scattering function structure includes scattering material, scattering material be selected from titan oxide particles, tantalum oxide particles,
Niobium oxide particle, zirconia particles, alumina particle, tungsten oxide particles, antimony oxide particle, vanadium oxide particle, molybdenum oxide particle,
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 particle, zns particle, cadmium sulfide particle, zinc telluridse particle and cadmium selenide particle
It is any one or more of.
Further, light conversion function structure includes light conversion material, and light conversion material includes quantum dot and/or non-quantum
Point fluorescent material, preferably non-quantum point fluorescent material includes fluorescent powder.
According to another aspect of the present invention, a kind of backlight module, including light source, light guide plate and reflecting layer are provided, it is guide-lighting
There is plate incidence surface and the first light-emitting surface, light source to be correspondingly arranged with incidence surface, and reflecting layer is correspondingly arranged with the first light-emitting surface, is led
Tabula rasa is above-mentioned light guide plate, and the first surface in light guide plate is the first light-emitting surface.
Further, backlight module further include: quantum dot film is correspondingly arranged with the first light-emitting surface；Brightness enhancement film, the amount of being set to
The side of the separate light guide plate of son point film.
According to another aspect of the present invention, it additionally provides a kind of display device, including backlight module and is set to backlight
Liquid crystal display panel in mould group, backlight module are above-mentioned backlight module.
It applies the technical scheme of the present invention, provides a kind of including substrate and the net that is set on a side surface of substrate
The light guide plate of point layer, since site layer further includes light converter section on the basis of including scattering part, and the light in light converter section
Transition material also have scattering process, thus using above-mentioned smooth converter section can not only by the incident light in incident light guide plate into
Row further scattering, additionally it is possible to be compensated by converting incident light with the brightness to emergent light, and then improve and set
It is equipped with equal photosensitiveness and the brightness of the display equipment of the light guide plate.
Other than objects, features and advantages described above, there are also other objects, features and advantages by the present invention.
Below with reference to figure, the present invention is described in further detail.
Detailed description of the invention
The Figure of description for constituting a part of the invention is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 shows the schematic diagram of the section structure of light guide plate provided by embodiment of the present invention；
Fig. 2 shows the overlooking structure diagrams of light guide plate provided by embodiment of the present invention；And
Fig. 3 shows the decomposition diagram of the cross-section structure of backlight module provided by embodiment of the present invention.
Wherein, the above drawings include the following reference numerals:
10, light source；20, light guide plate；210, substrate；220, scattering part；221, scattering netted dot；230, light converter section；231,
Light converts site；30, reflecting layer；40, quantum dot film；50, brightness enhancement film.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein.In addition, term " includes " and " tool
Have " and their any deformation, it is intended that cover it is non-exclusive include, for example, containing a series of steps or units
Process, method, system, product or equipment those of are not necessarily limited to be clearly listed step or unit, but may include without clear
Other step or units listing to Chu or intrinsic for these process, methods, product or equipment.
As described in background technique, blue light can be made to exist using blue-ray LED as light source in existing backlight module
It is converted into white light in quantum dot film to be emitted, however, can cause to show due to the leakage of side blue light in practical applications
The image quality of equipment declines.Present inventor studies regarding to the issue above, proposes 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, wherein the first surface of substrate 210, which has, to be divided
The groove of distribution is dissipated, groove forms the scattering function structure of scattering part 220, and light converter section 230 is set on first surface, and light turns
The light conversion function structure in portion 230 is changed to be arranged with the point format of dispersed distribution；Or scattering part and light converter section 230 are arranged at
On the first surface of substrate 210, and the scattering function structure of scattering part 220 and the light conversion function structure of light converter section 230 with
The point format of dispersed distribution is arranged.The light conversion function of specific position can be arranged in those skilled in the art by optical design
Structure.
Light guide plate of the invention is due to including substrate and the site being set on a side surface of substrate layer, site layer
It further include light converter section on the basis of including scattering part, and also there is the light conversion lattice point structure in light converter section scattering to make
With so that the incident light in incident light guide plate further can not only be scattered using above-mentioned smooth converter section, additionally it is possible to logical
It crosses to convert incident light and be compensated with the brightness to emergent light, and then improve the display equipment for being provided with the light guide plate
Equal photosensitiveness and brightness.
In above-mentioned light guide plate of the invention, scattering part 220 can be there are two types of set-up mode: in the first set-up mode
In, it is etched over the substrate 210 by etching technics and forms multiple grooves, using above-mentioned groove as scattering part 220, the depth of groove
It can be set according to the prior art with sectional area those skilled in the art；In second of set-up mode, by substrate
Be arranged on 210 it is multiple there is scattering material site, so that it is guide-lighting to be scattered realization to light using above-mentioned scattering material site
The light function of plate.
In above-mentioned light guide plate of the invention, it is preferable that first surface includes marginal zone and non-edge area, 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
Area refers respectively to the region on four sides of first surface, and on first surface in addition to the region on aforementioned four side
Region be non-edge area.Above-mentioned light guide plate can be curved surface, be also possible to plane.The determination of above-mentioned marginal zone depends on
Light leakage is to brightness and uniformity influence area.
It is leaked out since at least one side surface of light guide plate has light, so that above-mentioned smooth converter section 230 is set to side
In edge area, the incident light in incident light guide plate can not only further be scattered, and incident light is converted to out
The brightness for penetrating light compensates, additionally it is possible to pass through the light being emitted from the light leakage face of light guide plate under the action of light converter section 230
Complementary colors become white, to effectively overcome the leakage of blue light in light guide plate, improve brightness and the color of backlight module
The uniformity is spent, and then effectively improves the image quality for being provided with the display device of above-mentioned backlight module.
When above-mentioned smooth converter section 230 is set on the marginal zone of first surface, it is preferable that the orthographic projection of first surface is
The marginal zone of rectangle, the first surface includes four sub- marginal zones, at least one sub- marginal zone, the light of light converter section 230
Conversion function structure is the light conversion site 231 of at least a line dispersed distribution, wherein with the light conversion site 231 in a line
Spacing is equal.By keeping the spacing of light conversion site 231 in light converter section 230 identical, it is effective to ensure that positive light out
Evenness degree and brightness.It is to be understood that " row " refers to that in a sub- marginal zone, multiple sites are in straight line
On, and the straight line parallel is in the direction arrangement mode of the sub- marginal zone long side.
Those skilled in the art can be located at the light transition net with the medium spacing setting of a line to above-mentioned according to actual needs
The size of point 231 is set.When the spacing of light each in same a line conversion site 231 is equal, in order to further ensure forward direction
The evenness degree of light and brightness out, it is preferable that identical with the light conversion size of site 231 in a line.
In a preferred embodiment, equal with the spacing of light each in a line conversion site 231, and light turns in each row
The size of draping point 231 is successively decreased from sub- marginal zone to the center position of first surface.Also, the emergent light due to light source is passing through
Light leakage intensity after light guide plate is also in graded profile, and therefore, above-mentioned preferred embodiment can make each light conversion site 231 right
It answers light leakage light intensity to carry out light conversion, avoids light conversion and excessively cause coloration and brightness disproportionation.
In another preferred embodiment, equal with the spacing of light each in a line conversion site 231, and in each row
Center position of the concentration of light conversion material in light conversion site 231 from sub- marginal zone to first surface gradually successively decreases.It is above-mentioned
The arrangement mode of concentration gradient turns each light by principle identical with the arrangement mode of size gradual change in preferred embodiment
The corresponding light leakage light intensity of draping point 231 carries out light conversion, avoids light conversion and excessively causes coloration and brightness disproportionation.Similarly, on
The light leakage intensity for stating each sub- marginal zone may also be different, can equally take and control the concentration of light conversion material.
When above-mentioned smooth converter section 230 is set at least one sub- marginal zone of first surface, in a kind of preferred reality
It applies in mode, the setting of scattering part 220 is in non-edge area 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 guarantee that light converter section 230 realizes above-mentioned effect, additionally it is possible to
Realize scattering part 220 to the higher scattering efficiency of incident light in light guide plate.In order to avoid 220 pairs of light converter sections 230 of scattering part
Influence, it is further preferable that being arranged on one, two or three sub- marginal zone of first surface when above-mentioned smooth converter section 230
When, 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 influence of 220 pairs of light converter sections 230 of scattering part, when above-mentioned smooth converter section 230 is set to
When on the sub- marginal zone of at least one of one surface, in another preferred embodiment, scattering part 220 is arranged in non-edge area
In.At this point, the scattering part 220 in non-edge area, which is arranged in, to impact the light converter section 230 being arranged on marginal zone, from
And light converter section 230 can be arranged on any marginal zone of first surface.
When scattering part 220 can be arranged in simultaneously on marginal zone and non-edge area, non-edge area can also be provided only on
On.Preferably, the setting of scattering netted dot 221 is in non-edge area, the setting of 221 mirror symmetry of scattering netted dot；Also, in order to reduce scattering
Influencing each other between portion 220 and light converter section 230, it is preferable that scattering netted dot 221 and the light conversion site of marginal zone are set
231 are alternately arranged setting.
The size that those skilled in the art can convert site 231 according to light carries out the size of above-mentioned scattering netted dot 221
Setting, the shape of site can be arbitrary.Preferably, light conversion site and scattering netted dot 221 are parallel to first surface
Section is independently selected from any one of round and regular polygon；It is further preferable that light conversion site 231 and scattering netted dot 221
The section for being parallel to first surface be of similar shape, the diameter ratio or light that light converts site 231 and scattering netted dot 221 turn
The side ratio of draping point 231 and scattering netted dot 221 is more than or equal to 5:1.Due to being located at the ruler of the scattering netted dot 221 of guide-lighting back
It is very little can do it is very small, therefore, above-mentioned preferred embodiment can guarantee light conversion site 231 have relatively large ruler
It is very little, to ensure that the light transfer capability of light conversion site 231.
In above-mentioned light guide plate of the invention, when groove forms the scattering function structure of scattering part 220, in order to make to scatter
Realize higher scattering efficiency in portion 220, it is preferable that scattering function structure includes scattering material, and scattering material is selected from titanium oxide
Grain, tantalum oxide particles, niobium oxide particle, zirconia particles, alumina particle, tungsten oxide particles, antimony oxide particle, vanadium oxide
Grain, molybdenum oxide particle, silicon oxide particle, chrome oxide particle, ferric oxide particles, copper oxide particle, particles of lead oxide, yttrium oxide
Grain, manganese oxide particle, granules of stannic oxide, Zinc oxide particles, vulcanized lead particle, zns particle, cadmium sulfide particle, zinc telluridse
Grain is any one or more of with cadmium selenide particle；It is further preferable that the partial size of above-mentioned scattering material is 100~600nm.
In above-mentioned light guide plate of the invention, light conversion function structure includes light conversion material, can also include curable
Fluoropolymer resin.In order to ensure that the scattering power of light conversion site 231, it is preferable that light conversion function structure light converts function
The refractive index of energy structure is 1~4；Also, in order to make light conversion site 231 scattering power and light conversion energy with higher simultaneously
Power, it is preferable that light conversion function structure includes light conversion material, and light conversion material includes quantum dot and/or non-quantum point fluorescence
Material, it is further preferable that non-quantum point fluorescent material includes fluorescent powder.Light conversion material can also be quantum dot and curable poly-
The quantum dot microsphere that object is formed is closed, can be the fluorescent powder microballoon that fluorescent powder and curable polymer are formed.
According to another aspect of the present invention, a kind of backlight module is provided, as shown in figure 3, including light source 10, light guide plate 20
With reflecting layer 30, light guide plate 20 has incidence surface and the first light-emitting surface, and light source 10 is correspondingly arranged with incidence surface, and reflecting layer 30 and
First light-emitting 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 light-emitting surface.
Due to the light guide plate in above-mentioned backlight module include substrate and the site being set on a side surface of substrate layer,
Site layer further includes light converter section on the basis of including scattering part, and the also tool of the light conversion function structure in light converter section
There is scattering process, to above-mentioned smooth converter section can be utilized incident light guide plate after above-mentioned light guide plate is applied to backlight module
In incident light further scattered, and compensated by converting incident light with the brightness to emergent light, in turn
Improve equal photosensitiveness and the brightness of the display equipment for being provided with the backlight module.
In the above-mentioned backlight module of the present invention, light source 10 can be Ordinary Light Sources Have in 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, due to making light guide plate
20 have light converter section 230, to enable the blue light exciting light conversion for entering light converter section 230 from the light leakage face of light guide plate 20
Material and issue yellow light, blue light and yellow light are mixed to form white light, and then effectively reduce the leakage of blue light in backlight module；Separately
On the one hand, since the harm of blue light is low, energy saving and colour gamut is high, the energy of backlight module can also be reduced as light source 10 using blue light
Consumption.Above-mentioned reflecting layer 30 is used to for the emergent light for corresponding to 30 side of reflecting layer from light guide plate 20 being reflected back in 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, be correspondingly arranged with the first light-emitting surface；Brightness enhancement film 50, setting
In the side of the separate light guide plate 20 of 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 the light being emitted from quantum dot film 40, to improve back
The emitting brightness of optical mode group.
According to another aspect of the present invention, it provides a kind of display device, including backlight module and is set to backlight mould
Liquid crystal display panel in group, and backlight module is above-mentioned backlight module.Since the light guide plate in above-mentioned display device includes substrate
And it is set to the site layer on a side surface of substrate, site layer further includes light conversion on the basis of including scattering part
Portion, and the light conversion function structure in light converter section also has scattering process, so that above-mentioned light guide plate is applied to backlight mould
After group, the incident light in incident light guide plate can further be scattered using above-mentioned smooth converter section, and by by incident light
It is converted and is compensated with the brightness to emergent light, and then improve the equal photosensitiveness for being provided with the display equipment of the backlight module
And brightness.
Light guide plate provided by the present application is further illustrated below in conjunction with embodiment and comparative example.
Embodiment 1
Light guide plate provided in this embodiment includes substrate, scattering part and light converter section, and the first surface of substrate has dispersion
The groove of distribution, groove form the scattering function structure of scattering part, and light converter section is set on first surface, the light of light converter section
Conversion function structure is arranged with the point format of dispersed distribution, and first surface is 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 area, the setting of light converter section are arranged in four sub- marginal zones, scattering part on non-side
In edge area.
The light conversion site for having a line to be spacedly distributed on each sub- marginal zone, light convert site and scatter groove site
The section for being parallel to first surface is circle, and light converts the diameter ratio of site and circular groove scattering function structure as 5:1.Shape
Material at light conversion function structure is the CdSe/ZnS core-shell quanta dots and silica column matrix that emission wavelength is 570nm,
The concentration of middle quantum dot is identical.
Wherein, substrate is PMMA substrate, and the light transmittance of the light guide plate before not set smooth converter section is 95%, brightness uniformity
Degree is 90%.
Embodiment 2
Light guide plate provided in this embodiment includes substrate, scattering part and light converter section, and scattering part and light converter section are respectively provided with
On the first surface of light guide plate, and the scattering function structure of scattering part and the light conversion function structure of light converter section are to disperse 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 sub- marginal zone of third, the 4th sub- side
Edge area and non-edge area, the setting of light converter section are arranged in non-edge area in four sub- marginal zones, scattering part.
The light conversion site that a line is spacedly distributed is set on each sub- marginal zone, is arranged in non-edge area and is spacedly distributed
Scattering netted dot, the section for being parallel to first surface of light conversion site and scattering netted dot is circle, and light is converted site and dissipated
The diameter ratio for penetrating site is 10:1.The material of formation light conversion function structure is the CdSe/ZnS nucleocapsid that emission wavelength is 570nm
Quantum dot and silica column matrix, wherein the concentration of quantum dot is identical.
Wherein, substrate is PMMA substrate, and the material for forming scattering function structure is titan oxide particles, is converted in not set light
Before portion and be provided with scattering netted dot light guide plate light transmittance be 95%, luminance uniformity 90%.
Embodiment 3
Light guide plate provided in this embodiment the difference from example 2 is that:
Light converter section is arranged on four sub- marginal zones, and scattering part setting is in non-edge area and identical as light converter section
Four sub- marginal zones on, have the scattering netted dot that a line is spacedly distributed on each sub- marginal zone, the scatternet of marginal zone be set
Point and light conversion site are alternately arranged setting.
Embodiment 4
Light guide plate provided in this embodiment the difference from example 2 is that:
In each sub- marginal zone, the light conversion function structure of light converter section is the light transition net that two rows are spacedly distributed
Point, the size of each light conversion site is identical in two rows.
Embodiment 5
Light guide plate provided in this embodiment and the difference of embodiment 4 are:
In each row, light converts center position of the size from sub- marginal zone to first surface of site with 30% ratio successively
Successively decrease.
Embodiment 6
Light guide plate provided in this embodiment and the difference of embodiment 4 are:
Center position of the concentration of the light conversion material in light conversion site in each row from sub- marginal zone to first surface
Successively successively decreased with 30% ratio.
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 for forming scattering function structure is titan oxide particles, before not set smooth converter section and is set
The light transmittance for being equipped with the light guide plate of scattering netted dot is 95%, luminance uniformity 90%.
The light guide plate production backlight module being utilized respectively in above-described embodiment 1 to 6 and comparative example 1, and to above-mentioned backlight mould
The uniformity of chromaticity and brightness of group are tested, and equidistant 3 × 3 points, CIE-x deviation=CIE-x maximum value-are chosen
CIE-x minimum value, CIE-y deviation=CIE-y maximum value-CIE-y minimum value, the brightness in the point of luminance uniformity=9 is most
Brightness maxima greatly in/9 points of value, CIE (x, y) and CIE (x', y') are chromaticity coordinate value, and wherein back light is blue light
LED, test result is as follows table:
It can be seen that the backlight module made using light guide plate in above-described embodiment 1 to 6, color from above-mentioned test result
Degree uniformity and brightness are significantly improved compared with comparative example 1.
It can be seen from the above description that the above embodiments of the present invention realized the following chievements:
1, the incident light in incident light guide plate can not only further be scattered using above-mentioned smooth converter section, additionally it is possible to
It is compensated by converting incident light with the brightness to emergent light, and then improves and be provided with the display of the light guide plate and set
Standby equal photosensitiveness and brightness；
2, above-mentioned smooth converter section is set on marginal zone, additionally it is possible to turn the light being emitted from the light leakage face of light guide plate in light
Changing under the action of portion becomes white by complementary colors, to effectively overcome the leakage of blue light in light guide plate, improves back
The brightness of optical mode group and evenness degree, so effectively improve the display device for being provided with above-mentioned backlight module at image quality
Amount.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (17)
1. a kind of light guide plate, which is characterized in that light guide plate includes substrate (210), scattering part (220) and light converter section (230),
In,
The first surface of the substrate (210) has the groove of dispersed distribution, and the groove forms dissipating for the scattering part (220)
Functional structure is penetrated, the smooth converter section (230) is set on the first surface, and the light of the smooth converter section (230) converts function
Energy structure is arranged with the point format of dispersed distribution；Or
The scattering part (220) and the smooth converter section (230) are arranged on the first surface of the substrate (210), and institute
The scattering function structure of scattering part (220) and the light conversion function structure of the smooth converter section (230) are stated with the point of dispersed distribution
The setting of shape form,
The first surface includes marginal zone and non-edge area, and the smooth converter section (230) is arranged on the marginal zone.
2. light guide plate according to claim 1, which is characterized in that the orthographic projection of the first surface is rectangle, the side
Edge area includes four sub- marginal zones, at least one described sub- marginal zone, the light conversion function knot of the smooth converter section (230)
Structure is light conversion site (231) of at least a line dispersed distribution.
3. light guide plate according to claim 2, which is characterized in that between light conversion site (231) in a line
Away from equal.
4. light guide plate according to claim 2, which is characterized in that the size of light conversion site (231) in described same a line
It is identical.
5. light guide plate according to claim 2, which is characterized in that in each row light conversion site (231) size from
Successively decrease to the center position of the first surface marginal zone.
6. light guide plate according to claim 2, which is characterized in that the light in light conversion site (231) in each row
The concentration of transition material is gradually successively decreased from the sub- marginal zone to the center position of the first surface.
7. light guide plate according to claim 2, which is characterized in that the scattering part (220) is arranged in the non-edge area
In sub- marginal zone described at least one, the scattering function structure of the scattering part (220) is scattering netted dot (221).
8. light guide plate according to claim 7, which is characterized in that the scattering netted dot (221) is arranged in the non-edge
Qu Shang, scattering netted dot (221) the mirror symmetry setting.
9. light guide plate according to claim 7, which is characterized in that the scattering netted dot of the marginal zone is arranged in
(221) and light conversion site (231) is alternately arranged setting.
10. light guide plate according to claim 7, which is characterized in that light conversion site (231) and the scattering netted dot
(221) the section for being parallel to the first surface is independently selected from any one of round and regular polygon.
11. light guide plate according to claim 10, which is characterized in that light conversion site (231) and the scatternet
The section for being parallel to the first surface of point (221) is of similar shape, light conversion site (231) and the scattering
The side ratio of the diameter ratio of site (221) or light conversion site (231) and the scattering netted dot (221) is more than or equal to 5:1.
12. light guide plate according to claim 1, which is characterized in that the scattering function structure includes scattering material, described
Scattering material is selected from titan oxide particles, tantalum oxide particles, niobium oxide particle, zirconia particles, alumina particle, tungsten oxide
Grain, antimony oxide particle, vanadium oxide particle, molybdenum oxide particle, 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 particle, zinc sulphide
Grain, cadmium sulfide particle, zinc telluridse particle and cadmium selenide particle are any one or more of.
13. light guide plate according to claim 1, which is characterized in that the smooth conversion function structure includes light conversion material,
The light conversion material includes quantum dot and/or non-quantum point fluorescent material.
14. light guide plate according to claim 13, which is characterized in that the non-quantum point fluorescent material includes fluorescent powder.
15. a kind of backlight module, including light source (10), light guide plate (20) and reflecting layer (30), the light guide plate (20) have into
Smooth surface and the first light-emitting surface, the light source (10) is correspondingly arranged with the incidence surface, and the reflecting layer (30) and described first
Light-emitting surface is correspondingly arranged, which is characterized in that the light guide plate (20) is light guide plate described in any one of claims 1 to 14
(20), the first surface in the light guide plate (20) is the first light-emitting surface.
16. backlight module according to claim 15, which is characterized in that the backlight module further include:
Quantum dot film (40) is correspondingly arranged with first light-emitting surface；
Brightness enhancement film (50) is set to the side far from the light guide plate (20) of the quantum dot film (40).
17. a kind of display device exists including backlight module and the liquid crystal display panel being set on the backlight module, feature
In the backlight module is backlight module described in claim 15 or 16.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106941583B (en) * | 2017-02-17 | 2020-01-24 | 苏州佳世达电通有限公司 | Light guide device and network camera using same |
| CN106950632A (en) * | 2017-05-26 | 2017-07-14 | 深圳市国显科技有限公司 | A kind of quantum dot filter blue Light Film and its display |
| 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 |
| TWI777350B (en) * | 2020-12-31 | 2022-09-11 | 友達光電股份有限公司 | Backlight module |
| CN115917419A (en) | 2021-06-25 | 2023-04-04 | 京东方科技集团股份有限公司 | Backlight module and display device |
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| CN102073090A (en) * | 2010-11-05 | 2011-05-25 | 深圳市华星光电技术有限公司 | Light guide plate and backlight module |
| CN104570191A (en) * | 2013-10-24 | 2015-04-29 | 华为终端有限公司 | Light guide plate and backlight module |
| CN105353557A (en) * | 2015-11-03 | 2016-02-24 | 纳晶科技股份有限公司 | Backlight module and display device |
| CN105739176A (en) * | 2016-03-18 | 2016-07-06 | 纳晶科技股份有限公司 | Backlight module and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100776463B1 (en) * | 2004-09-11 | 2007-11-16 | 레디언트 옵토-일렉트로닉스 코포레이션 | Light guide plate and LGP-based FFP |
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|---|---|---|---|---|
| CN102073090A (en) * | 2010-11-05 | 2011-05-25 | 深圳市华星光电技术有限公司 | Light guide plate and backlight module |
| CN104570191A (en) * | 2013-10-24 | 2015-04-29 | 华为终端有限公司 | Light guide plate and backlight module |
| CN105353557A (en) * | 2015-11-03 | 2016-02-24 | 纳晶科技股份有限公司 | Backlight module and display device |
| CN105739176A (en) * | 2016-03-18 | 2016-07-06 | 纳晶科技股份有限公司 | Backlight module and display device |
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