CN106405882A - Local backlight adjusting membrane, backlight module and liquid crystal display device - Google Patents
Local backlight adjusting membrane, backlight module and liquid crystal display device Download PDFInfo
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- CN106405882A CN106405882A CN201611039436.7A CN201611039436A CN106405882A CN 106405882 A CN106405882 A CN 106405882A CN 201611039436 A CN201611039436 A CN 201611039436A CN 106405882 A CN106405882 A CN 106405882A
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- 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
- G02F1/0147—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 thermo-optic effects
-
- 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
- G02F1/0102—Constructional details, not otherwise provided for in this subclass
- G02F1/0105—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
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- 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
- G02F1/133601—Illuminating devices for spatial active dimming
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a local backlight adjusting membrane, a backlight module and a liquid crystal display device, and belongs to the technical field of liquid crystal display. The local backlight adjusting membrane comprises a thermally light-adjusting layer made of a thermally light-adjusting material, and a plurality of heating units arranged on the thermally light-adjusting layer and controlled by a microcircuit. Each heating unit controlled by the microcircuit is used for adjusting the temperature of a preset area of the thermally light-adjusting layer. By arranging the local backlight adjusting membrane in the backlight module, the precise local backlight adjusting can be achieved. Especially after the local backlight adjusting membrane is applied in the side light type backlight module, the advantage of the side light type backlight module of being small in thickness is kept, and the precise local backlight adjusting of the side light type backlight module is achieved.
Description
Technical field
The present invention relates to technical field of liquid crystal display, particularly to a kind of local backlight adjusting film, backlight module and liquid crystal
Display device.
Background technology
With the continuous development of lcd technology, people for the display effect of liquid crystal display requirement increasingly
Height, the research and development for the method for the display effect improving liquid crystal display become the emphasis that liquid crystal display is developed.Each
Class improves in the method for liquid crystal display display effect, and Local Dimming (local backlight regulation) technology is due to easily real
Existing, effect substantially receives extensive concern.
The implementation of existing Local Dimming technology is：Using a large amount of LED (Light Emitting Diode,
Light emitting diode) LED formation light source, according to the light and shade of image to display, subregion is carried out to backlight.Controlled respectively using chip
Making the switch of the LED of each subregion, to control the intensity of each subregion backlight, thus realize local backlight adjusting, and then improving
The contrast of display picture, grey exponent number, and reduce ghost, make liquid crystal display have good display effect.
During realizing the present invention, the inventors discovered that at least there is problems with prior art：Existing liquid
The backlight module of crystal display device is divided into down straight aphototropism mode set and sidelight type backlight module according to the position of light source.Under straight
For formula backlight module, due to LED size and to the restriction of the control of LED switch so that backlight subarea not fine it is impossible to
Realize accurate local backlight to adjust；For sidelight type backlight module, because light source is located at the side of backlight module, therefore
Can only embark on journey or in column backlight be carried out subregion (as shown in Figure 1) and equally can not carry out accurate local backlight regulation.Comprehensive
For, adjusted by controlling the switch of LED not enable accurate local backlight.
Content of the invention
In order to solve above-mentioned technical problem, the embodiment of the present invention provides a kind of local backlight based on thermally lightadjusting material
Adjusting film, backlight module and liquid crystal display, the light transmission using thermally lightadjusting material changes with the change of temperature
This feature, realizes accurate local back by the intensity controlling thermally lightadjusting material to control backlight to the transmitance of light
Light is adjusted.
Specifically, including following technical scheme：
In a first aspect, the embodiment of the present invention provides a kind of local backlight adjusting film, this local backlight adjusting film includes：By heat
Cause light control material formed thermic light modulation layer, and be arranged in described thermic light modulation layer multiple by microcircuit control plus
Hot cell；It is respectively used to control the predeterminable area of described thermic light modulation layer by the heating unit that microcircuit controls described in each
Temperature.
Alternatively, described thermally lightadjusting material is polymerized under illumination condition by photo polymerization monomer, polyethers and light trigger
Formed.
Alternatively, the chemical constitution of described photo polymerization monomer is as follows：
Described light trigger is alpha-alcohol ketone photoinitiator.
Alternatively, described light trigger is 2- hydroxy-2-methyl -1- phenylacetone；The molecular weight of described polyethers is 1000
～3000.
Alternatively, the molar ratio of described photo polymerization monomer, described polyethers and described light trigger is (4～5)：5：
(0.1～1).
Alternatively, the thickness of described thermic light modulation layer is 200 μm～800 μm.
Alternatively, described included by the heating unit that microcircuit controls：Cover miniature in described thermic light modulation layer
The transistor control circuit and covering indium tin oxide films in described micro-transistors control circuit.
Second aspect, the embodiment of the present invention provides a kind of backlight module, and this backlight module includes：Reflector plate, positioned at described
Light guide plate above reflector plate, positioned at the light source of described at least one side of light guide plate, and, above described light guide plate
Blooming piece；Wherein, described backlight module also includes：Above-mentioned local between described light guide plate and described blooming piece
Backlight adjusting film.
The third aspect, the embodiment of the present invention provides another kind of backlight module, and this backlight module includes：Reflector plate, positioned at institute
State the light source above reflector plate, the diffuser plate above described light source, and, the blooming above described diffuser plate
Piece；Wherein, described backlight module also includes：Above-mentioned local backlight between described diffuser plate and described blooming piece is adjusted
Section film.
Fourth aspect, the embodiment of the present invention provides a kind of liquid crystal display, and this liquid crystal display includes the above-mentioned back of the body
Light module.
The beneficial effect of technical scheme provided in an embodiment of the present invention：
The embodiment of the present invention changes this feature based on the light transmission variation with temperature of thermally lightadjusting material, by heat
Electroluminescent material is applied in the local backlight regulation of liquid crystal display, there is provided a kind of local backlight adjusting film.This local
Backlight adjusting film includes the thermic light modulation layer being formed by thermally lightadjusting material and multiple passing through of being arranged in thermic light modulation layer
The heating unit that microcircuit controls.Each heating unit corresponds to a predeterminable area of thermic light modulation layer respectively, and each heating is single
The temperature of the independently controlled corresponding predeterminable area of thermic light modulation layer of unit, thus realize to thermic light modulation layer local transparent
The control of rate.Local backlight adjusting film provided in an embodiment of the present invention is arranged on (side-light type between light guide plate and blooming piece
Backlight module) or diffuser plate and blooming piece between after (down straight aphototropism mode set), controlled respectively by each heating unit
The temperature of thermic light modulation layer zones of different, thus control thermic light modulation layer zones of different to the light being projected by light guide plate or diffuser plate
The transmitance of line, and then change the backlight intensity of backlight module zones of different, realize local backlight and adjust.Due to by microcircuit
The heating unit size controlling can be very little, and backlight subarea therefore can be made finer, and the printing opacity of thermic light modulation layer
Rate can carry out consecutive variations with the change of temperature, and compared with existing control LED switch, the change of backlight intensity is richer
Richness, thus realize accurate local backlight adjusting, improves the display effect of liquid crystal display.
After particularly applying local backlight adjusting film provided in an embodiment of the present invention in sidelight type backlight module, both retained
Sidelight type backlight module thickness little advantage, overcomes existing sidelight type backlight module again and is only capable of embarking on journey or adjusts the back of the body in column
The problem of light, effectively improves the display effect of sidelight type backlight module, is conducive to the development of sidelight type backlight module.
Brief description
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, will make to required in embodiment description below
Accompanying drawing be briefly described it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the effect diagram of the local backlight regulation of existing sidelight type backlight module；
Fig. 2 is the structural representation of local backlight adjusting film provided in an embodiment of the present invention；
Fig. 3 is the operation principle schematic diagram of thermally lightadjusting material；
Fig. 4 is the structural representation of sidelight type backlight module provided in an embodiment of the present invention；
Fig. 5 is the structural representation of down straight aphototropism mode set provided in an embodiment of the present invention；
Fig. 6 is for forming the printing opacity of the thermally lightadjusting material of thermic light modulation layer of local backlight adjusting film in embodiment 2
The curve that rate varies with temperature；
The partial schematic diagram of the local backlight adjusting film that Fig. 7 provides for embodiment 2.
Reference represents respectively：
100- local backlight adjusting film；
1- thermic light modulation layer；
The heating unit that 2- is controlled by microcircuit；
200- light guide plate；
300- reflector plate；
400- light source；
500- blooming piece；
600- diffuser plate.
Specific embodiment
For making technical scheme and advantage clearer, below in conjunction with accompanying drawing embodiment of the present invention is made into
One step ground describes in detail.Unless otherwise defined, all technical terms used by the embodiment of the present invention are respectively provided with and art technology
The identical implication that personnel are generally understood that.
In a first aspect, the embodiment of the present invention provides a kind of local backlight adjusting film, referring to Fig. 2, this local backlight adjusting film
100 include：The thermic light modulation layer 1 being formed by thermally lightadjusting material, and it is arranged on multiple in thermic light modulation layer 1 by micro- electricity
The heating unit 2 that road controls；The heating unit 2 that each is controlled by microcircuit is respectively used to control the default of thermic light modulation layer 1
The temperature in region.
Thermally lightadjusting material (Thermally Adjusting matetial) is that a class can rely on variation of ambient temperature
And change the hot optical function material of itself transmitance to incident ray and absorption characteristic.The embodiment of the present invention is based on thermic and dims
This performance that material has, by thermoluminescence materials application in the local backlight of liquid crystal display is adjusted, there is provided
A kind of local backlight adjusting film 100.This local backlight adjusting film 100 includes the thermic light modulation layer 1 being formed by thermally lightadjusting material
And it is arranged on the multiple heating units 2 controlling by microcircuit in thermic light modulation layer.Each heating unit 2 corresponding heat respectively
Cause a predeterminable area of light modulation layer 1, the predeterminable area of the independently controlled corresponding thermic light modulation layer of each heating unit 2
Temperature, thus realizing control to thermic light modulation layer 1 local transparent rate.
It will be appreciated to those of skill in the art that in local backlight adjusting film provided in an embodiment of the present invention, thermic is adjusted
The predeterminable area of photosphere 1 refers to the region corresponding with backlight subarea.That is heating unit 2 is in thermic light modulation layer 1
Distribution situation is corresponding with backlight subarea.In actual applications, according to required backlight subarea in local backlight regulation, in thermic
In light modulation layer 1, the heating unit 2 being controlled by microcircuit accordingly is set, makes backlight subarea and the heating controlling by microcircuit
Unit 2 assumes one-to-one relation.Control the size of microcircuit electric current by signal control chip, to control heating unit 2
The temperature of heating, thus change the transmitance to light for the respective regions in thermic light modulation layer 1.
Local backlight adjusting film 100 provided in an embodiment of the present invention is arranged on (sidelight between light guide plate and blooming piece
Formula backlight module) or diffuser plate and blooming piece between after (down straight aphototropism mode set), controlled respectively by each heating unit 2
Heat the temperature causing light modulation layer 1 zones of different, thus controlling the light penetration of thermic light modulation layer 1 zones of different.When backlight mould
The light that in group, light source sends is projected by light guide plate (or diffuser plate) and enters local backlight adjusting film provided in an embodiment of the present invention
When in 100, thermic light modulation layer 1 zones of different to the transmitance of the light being projected by light guide plate or diffuser plate with temperature change
And change, to control the intensity being projected the light entering subsequent optical diaphragm by local backlight adjusting film 100, finally realize local back
Light is adjusted.
Heating unit 2 size due to being controlled by microcircuit can be very little, and backlight subarea therefore can be made more smart
Carefully, in theory can unlimited subregion, and the light transmittance of thermic light modulation layer can carry out consecutive variations with the change of temperature, with
Existing control LED switch is compared, and the change of backlight intensity is abundanter, thus realize accurate local backlight adjusting, improves
The display effect of liquid crystal display.
After particularly applying local backlight adjusting film 100 provided in an embodiment of the present invention in sidelight type backlight module, both
Remain the little advantage of sidelight type backlight module thickness, overcome existing sidelight type backlight module again and be only capable of embarking on journey or adjust in column
The problem of section backlight, effectively improves the display effect of sidelight type backlight module, is conducive to the development of sidelight type backlight module.
It should be noted that using after local backlight adjusting film 100 provided in an embodiment of the present invention, for using LED as
The backlight module of light source, no longer can carry out subregion, or the quantity reducing LED to LED.And, for adopting cold-cathode lamp
For the backlight module of the conventional light source such as pipe, equally can using local backlight adjusting film 100 provided in an embodiment of the present invention
Realize accurate local backlight to adjust.
In local backlight adjusting film 100 provided in an embodiment of the present invention, the thermally lightadjusting material forming thermic light modulation layer 1 can
Think existing all kinds of thermally lightadjusting material, including inorganic thermally lightadjusting material and organic thermally lightadjusting material, wherein, inorganic heat
Cause complex compound such as yttrium zirconium oxide, silicon, calcium titanium manganese ore etc. that light control material can be the compositions such as inorganic semiconductor, organic thermic light modulation
Material can be polyalcohol hydrogel, lysotropic liquid crystal, blend polymer, polymers copolymers (such as poly-methyl methacrylate
Ester and ethylene vinyl acetate copolymer) etc..
Consider the factors such as excursion and the response time of light transmittance, more preferred in one kind of the embodiment of the present invention
Embodiment in, be polymerized, using a kind of, the thermic being formed under illumination condition by photo polymerization monomer, polyethers and light trigger
Light control material is as the material of thermic light modulation layer 1.Referring to Fig. 3, the operation principle of this thermally lightadjusting material is：Polyethers is mutually to become
Point, photo polymerization monomer occurs polymerisation to form matrix resin, when temperature relatively low (such as room temperature), phase transformation under light trigger
Composition is to separate phase with matrix resin, and now thermally lightadjusting material is opaque, and that is, light can not pass through；When temperature is higher, phase
Become composition gradually compatible with matrix resin so that thermally lightadjusting material is transparent, i.e. light-transmissive.This kind of thermally lightadjusting material
Light transmittance excursion is big, and the response time is short, and more obvious light transmittance can occur in less range of temperature
Change, disclosure satisfy that the response speed needs of liquid crystal display display picture.This thermally lightadjusting material is to light simultaneously
Transmitance variation with temperature is reversible.
In above-mentioned thermally lightadjusting material, photo polymerization monomer can be for having the compound as shown in formula (I)；Light-initiated
Agent can be alpha-alcohol ketone photoinitiator, such as 2- hydroxy-2-methyl -1- phenylacetone (Darocur1173)；Polyethers is permissible
The polyethers that formed for polyglycol ether or by expoxy propane or epoxy butane etc. or by oxirane, ring
Two kinds in Ethylene Oxide and epoxy butane or the polyethers of two or more formation；The molecular weight of polyethers can for 1000～
3000, such as 1000,1200,1500,1600,1700,1800,1900,2000,2100,2200,2300,2400,2500,
2800th, 3000 etc..
Wherein, photo polymerization monomer can be obtained using the ring-opening reaction of epoxide as follows：
The concrete preparation process of this photo polymerization monomer can be：Benzene oxygen is added first in reaction vessel (such as three-necked bottle)
Acetic acid (PAA), solvent and catalyst, by gained system be heated to 55 DEG C～65 DEG C so that phenoxy acetic acid is completely dissolved after, Xiang Qi
Middle dropping is dissolved with the GMA (GMA) of polymerization inhibitor, is then reacted at 80 DEG C～90 DEG C.Benzene oxygen
The molar ratio of acetic acid, GMA, catalyst and polymerization inhibitor can be：1：(1～1.1)：(0.01～
0.015)：(0.005～0.008).Phenoxy acetic acid with the mass ratio of solvent can be：1：(0.8～1.2).In course of reaction
Middle sampling and measuring acid number, stops reaction after acid number is stable.Products therefrom is washed with sodium hydrate aqueous solution to remove unreacted
Complete phenoxy acetic acid and polymerization inhibitor, then obtain above-mentioned photo polymerization monomer after carrying out vacuum distillation.Wherein, solvent can be second
The solvent that the organic reactions such as acetoacetic ester, acetone, ethanol are commonly used, catalyst can be TBAB, and polymerization inhibitor can be right
The acrylic ester compounds such as the hydroxyanisol polymerization inhibitor conventional when carrying out chemical reaction.
React the tool obtaining thermally lightadjusting material using the photo polymerization monomer shown in above-mentioned formula (I) and polyethers, light trigger
Body process can be：By the photo polymerization monomer shown in above-mentioned formula (I) with polyethers, light trigger according to molar ratio (4～5)：5：
The ratio mixing of (0.1～1), the mixed system obtaining is being coated on substrate by film applicator, in power 800w～1200w
High-pressure sodium lamp under be exposed obtaining thermally lightadjusting material, away from for 25cm～35cm, the time for exposure is 10s～30s to lamp.Also may be used
Add a small amount of tri (propylene glycol) diacrylate in photo polymerization monomer and polyethers, the mixed system of light trigger, as friendship
Connection agent and diluent, the quality of the tri (propylene glycol) diacrylate of addition accounts for photo polymerization monomer and polyethers, light trigger
The percentage of the gross mass of mixed system can be 0.2%～0.5%.
Further, in local backlight adjusting film 100 provided in an embodiment of the present invention, the thickness of thermic light modulation layer 1 does not have
Strict restriction, the thickness of thermic light modulation layer 1 is thinner, when the temperature is changed, during the response of the change of its transmitance to light
Between shorter, but the minimum light transmission rate that can reach can increase.For example, gather for by with the light shown in above-mentioned formula (I)
Close monomer and react the thermic light modulation layer 1 that the thermally lightadjusting material obtaining is formed with polyethers, light trigger, when its thickness is 200 μm
When～800 μm, such as 200 μm, 300 μm, 400 μm, 500 μm, 600 μm, 700 μm, 800 μm etc., permissible to the transmitance of light
Change in the range of 0.5%～92%, response time of change is 0.05s.
Further, in local backlight adjusting film 100 provided in an embodiment of the present invention, the heating list that controlled by microcircuit
The concrete form of unit 2 does not have strict restriction, as long as being capable of controlling heating-up temperature by control electric current size.One
Planting optional implementation is：The heating unit 2 that microcircuit controls includes：Cover the micro-transistors in thermic light modulation layer 1
Control circuit and covering tin indium oxide (ITO) film in micro-transistors control circuit.It should be noted that for same
For one local backlight adjusting film 100, multiple micro-transistors control circuits can be set on indium tin oxide films,
One backlight subarea of the corresponding thermic light modulation layer 1 of each micro-transistors control circuit, the heating list controlling in order to microcircuit
Unit 2 and the combination of thermic light modulation layer 1.
Second aspect, the embodiment of the present invention provides a kind of side-light backlight mould using above-mentioned local backlight adjusting film
Group.Referring to Fig. 5, this sidelight type backlight module includes：
Reflector plate 300,
Positioned at the light guide plate 200 of reflector plate 300 top,
Positioned at the light source 400 of at least one side of light guide plate 200,
And,
Blooming piece 500 positioned at light guide plate 200 top；
Wherein, this sidelight type backlight module also includes：Above-mentioned office between light guide plate 200 and blooming piece 500
Portion's backlight adjusting film 100.
In this sidelight type backlight module, local backlight adjusting film 100 is arranged between light guide plate 200 and blooming piece 500,
The light sending when the light source 400 positioned at light guide plate 200 side enters light guide plate 200, more reflected 300 reflection, then from leading
After tabula rasa 200 enters local backlight adjusting film 100 after projecting, according to the needs of display picture, by signal control chip difference
Controlling the size of microcircuit electric current in each heating unit 2, controlling the temperature of each heating unit 2 heating, thus controlling heat
Cause the transmitance to light for the respective regions in light modulation layer 1, and then control enters the intensity of the light of subsequent optical diaphragm 500,
Realize local backlight eventually to adjust.For example, if certain regional luminance is relatively low in display picture, control thermic light modulation layer 1
Corresponding region has relatively low light penetration；If certain regional luminance is higher in display picture, control thermic light modulation
Layer 1 corresponding region has higher light penetration.
Because local backlight adjusting film 100 can carry out fine backlight subarea, and the transmitance of light can be connected
Continuous change, therefore, applies the sidelight type backlight module of above-mentioned local backlight adjusting film 100 remaining the same of the little advantage of thickness
When it is achieved that accurate backlight is adjusted, overcome existing sidelight type backlight module and be only capable of embarking on journey or adjust asking of backlight in column
Topic.
It should be noted that in sidelight type backlight module provided in an embodiment of the present invention, local backlight adjusts adjusting film
Thermic light modulation layer 1 in 100 can be towards light guide plate 200 side it is also possible to towards blooming piece 500 side.
Further, in sidelight type backlight module provided in an embodiment of the present invention, blooming piece 500 includes diffusion sheet, rib
One of eyeglass, DBEF brightening film sheet, fluorescent powder membrane, quantum dot film etc. or several combinations, blooming piece 500 is specific
Composition and set-up mode are arranged according to this area routine techniques means according to actual conditions, and therefore not to repeat here.Meanwhile,
The parts such as necessary framework, backboard are also included in sidelight type backlight module provided in an embodiment of the present invention, conventional using this area
Technological means, here does not equally repeat.
Further, in sidelight type backlight module provided in an embodiment of the present invention, light source 400 can be LED/light source, also may be used
Think the conventional light source such as CCFL, the arrangement of light source 400 adopts ordinary skill in the art means, the present invention
Embodiment is not particularly limited.
The third aspect, the embodiment of the present invention provides a kind of downward back optical mode using above-mentioned local backlight adjusting film
Group.Referring to Fig. 6, this down straight aphototropism mode set includes：
Reflector plate 300,
Positioned at the light source 400 of reflector plate 300 top,
Positioned at the diffuser plate 600 of light source 400 top,
And,
Blooming piece 500 positioned at diffuser plate 600 top；
Wherein, this down straight aphototropism mode set also includes：Above-mentioned office between diffuser plate 600 and blooming piece 500
Portion's backlight adjusting film 100.
In this down straight aphototropism mode set, local backlight adjusting film 100 is arranged between diffuser plate 600 and blooming piece 500,
It is diffused when the light that the light source 400 positioned at reflector plate 300 top sends is reflected into diffuser plate 600 for reflected 300, then
Projected after entrance local backlight adjusting film 100 by diffuser plate 600, according to the needs of display picture, divided by signal control chip
Not controlling the size of microcircuit electric current in each heating unit 2, controlling the temperature of each heating unit 2 heating, thus controlling
The transmitance to light for the respective regions in thermic light modulation layer 1, and then control the intensity of the light entering subsequent optical diaphragm 500,
Finally realize local backlight to adjust.For example, if certain regional luminance is relatively low in display picture, control thermic light modulation layer
1 corresponding region has relatively low light penetration；If certain regional luminance is higher in display picture, control thermic light modulation
Layer 1 corresponding region has higher light penetration.
Because local backlight adjusting film 100 can carry out fine backlight subarea, and the transmitance of light can be connected
Continuous change, therefore, applies the down straight aphototropism mode set of above-mentioned local backlight adjusting film 100 to be capable of accurate local backlight and adjusts
Section.
It should be noted that in down straight aphototropism mode set provided in an embodiment of the present invention, local backlight adjusts adjusting film
Thermic light modulation layer 1 in 100 can be towards diffuser plate 600 side it is also possible to towards blooming piece 500 side.
Further, in down straight aphototropism mode set provided in an embodiment of the present invention, blooming piece 500 includes diffusion sheet, rib
One of eyeglass, DBEF brightening film sheet, fluorescent powder membrane, quantum dot film etc. or several combinations, blooming piece 500 is specific
Composition and set-up mode are arranged according to this area routine techniques means according to actual conditions, and therefore not to repeat here.Meanwhile,
The parts such as necessary framework, backboard are also included in down straight aphototropism mode set provided in an embodiment of the present invention, conventional using this area
Technological means, here does not equally repeat.
Further, in down straight aphototropism mode set provided in an embodiment of the present invention, light source 400 can be LED/light source, also may be used
Think the conventional light source such as CCFL, the arrangement of light source 400 adopts ordinary skill in the art means, the present invention
Embodiment is not particularly limited.
Fourth aspect, a kind of liquid crystal display of the embodiment of the present invention, the backlight module in this liquid crystal display adopts
Above-mentioned sidelight type backlight module or down straight aphototropism mode set.
Because above-mentioned sidelight type backlight module and down straight aphototropism mode set all can carry out accurate local backlight tune
Section, therefore, applies the display picture tool of the liquid crystal display of above-mentioned sidelight type backlight module or down straight aphototropism mode set
There are higher contrast and grey exponent number, ghost is less simultaneously, and display effect is good.
Liquid crystal display described in the embodiment of the present invention is specifically as follows LCD TV, notebook computer screen, puts down
Any product with display function such as plate computer, mobile phone or part.
For ULED (Ultra Light Emitting Diode) TV, the application embodiment of the present invention carries
For sidelight type backlight module after, on the one hand there is good display effect, on the other hand there is relatively thin thickness, improve ULED
Product competitiveness.
Below by specific embodiment, technical scheme is described in detail.
In the examples below, raw materials used unreceipted production firm and specification person be can by city available from normal
Rule product.
Embodiment 1
The present embodiment provides one kind, and being used for shown in Chinese style (I) prepares formation thermic light modulation in local backlight adjusting film above
The preparation method of the photo polymerization monomer of thermally lightadjusting material of layer, this photo polymerization monomer is by phenoxy acetic acid (PAA) and metering system
Acid glycidyl ester (GMA) is obtained by the ring-opening reaction of epoxide, comprises the following steps that：
First to equipped with addition 50g phenoxy acetic acid, 40g acetic acid in constant pressure funnel, the three-necked bottle of bulb condensation device
Ethyl ester and 1.5g TBAB, by gained system be heated to 60 DEG C so that phenoxy acetic acid is completely dissolved after, drip thereto
It is dissolved with the GMA 49g of 0.3g MEHQ, then reacted at 85 DEG C.Reacting
Acid number is measured by sampling in journey, after acid number is stable, stops reaction.Products therefrom mass concentration be 10% NaOH water-soluble
Liquid washing is removing the complete phenoxy acetic acid of unreacted and polymerization inhibitor, then obtains light yellow transparent liquid after carrying out vacuum distillation,
I.e. photo polymerization monomer shown in Chinese style (I) above, yield 74%.
Embodiment 2
The present embodiment provides a kind of photo polymerization monomer obtaining using embodiment 1 to react with polyethers, light trigger to obtain
Thermally lightadjusting material, and the local backlight adjusting film based on this thermally lightadjusting material.
In the present embodiment, thermally lightadjusting material is by the photo polymerization monomer of embodiment 1, PPG 2000 (i.e. molecular weight
PPG for 2000, purchased from Guangzhou Wen Long Chemical Co., Ltd., model DL2000D) and 2- hydroxy-2-methyl -1-
Phenylacetone reacts under ultraviolet light and obtains, and detailed process is：
By the photo polymerization monomer of embodiment 1, PPG 2000 and 2- hydroxy-2-methyl -1- phenylacetone according to
Molar ratio 4.5:5:0.5 ratio mixes, and add account for photo polymerization monomer, PPG 2000 and 2- hydroxyl-
Then gained mixed system is passed through by the tri (propylene glycol) diacrylate of the 0.3% of 2- methyl isophthalic acid-phenylacetone gross mass
Film applicator film on substrate, exposes under the high-pressure sodium lamp for 1000w for the power, and away from for 30cm, the time for exposure is 20s to lamp, obtains
The thermally lightadjusting material film being 500 μm to thickness.
Above-mentioned thermally lightadjusting material film is taken off from substrate, its light transmittance variation with temperature situation is tested,
Result is as shown in Figure 6.From fig. 6, it can be seen that in heating process, this thermally lightadjusting material film rises to 65 in temperature by 25 DEG C
During DEG C, light transmittance is improved to 92% by 0.5%；In cooling procedure, with the reduction of temperature, this thermally lightadjusting material
The light transmittance of film is reduced to 0.5% by 92%；And above-mentioned change procedure can repeat, the response time of change is
0.05s.
Using above-mentioned thermally lightadjusting material film as the thermic light modulation layer of local backlight adjusting film, cover thereon and pass through micro- electricity
The heating unit that road controls, obtains local backlight adjusting film.Wherein, tin indium oxide is included by the heating unit that microcircuit controls
Film and the multiple micro-transistors control circuits needing arrangement according to backlight subarea being arranged on indium tin oxide films, and
Micro-transistors control circuit and thermally lightadjusting material film directly contact.By signal control chip, each minicrystal management and control
The temperature change of circuit independent control thermic light modulation layer respective regions processed.The structure of this local backlight adjusting film can be found in Fig. 7.Figure
7 structures showing the local of local backlight adjusting film that the present embodiment provides.Based on the property of thermally lightadjusting material, should
The light transmittance of each backlight subarea of local backlight adjusting film all can be 0.5%～92% within the temperature range of 25 DEG C～65 DEG C
Between change, the response time be 0.05s, meet the requirement that liquid crystal display picture shows.
Embodiment 3
The present embodiment provides a kind of photo polymerization monomer obtaining using embodiment 1 to react with polyethers, light trigger to obtain
Thermally lightadjusting material, and the local backlight adjusting film based on this thermally lightadjusting material.
In the present embodiment, thermally lightadjusting material is by the photo polymerization monomer of embodiment 1, PPG 1000 (i.e. molecular weight
PPG for 1000, purchased from Guangzhou Wen Long Chemical Co., Ltd., model DL1000D) and 2- hydroxy-2-methyl -1-
Phenylacetone reacts under ultraviolet light and obtains, and detailed process is：
By the photo polymerization monomer of embodiment 1, PPG 1000 and 2- hydroxy-2-methyl -1- phenylacetone according to
Molar ratio 4:5:0.1 ratio mixes, and adds and account for photo polymerization monomer, PPG 1000 and 2- hydroxyl -2-
Then gained mixed system is passed through to apply by the tri (propylene glycol) diacrylate of the 0.2% of methyl isophthalic acid-phenylacetone gross mass
Film machine film on substrate, exposes under the high-pressure sodium lamp for 800w for the power, and away from for 25cm, the time for exposure is 30s to lamp, obtains thickness
Spend the thermally lightadjusting material film for 200 μm.
Above-mentioned thermally lightadjusting material film is taken off from substrate, its light transmittance variation with temperature situation is tested,
Result is essentially identical with the thermally lightadjusting material film of embodiment 2 gained, and the response time of change is 0.05s.
Using above-mentioned thermally lightadjusting material film as the thermic light modulation layer of local backlight adjusting film, cover thereon and pass through micro- electricity
The heating unit that road controls, obtains local backlight adjusting film.Wherein, tin indium oxide is included by the heating unit that microcircuit controls
Film and the multiple micro-transistors control circuits needing arrangement according to backlight subarea being arranged on indium tin oxide films, and
Micro-transistors control circuit and thermally lightadjusting material film directly contact.Each micro-transistors control circuit independent control thermic
The temperature change of light modulation layer respective regions.The structure of this local backlight adjusting film also can be found in Fig. 7.Based on thermally lightadjusting material
Property, the light transmittance of each backlight subarea of this local backlight adjusting film all can within the temperature range of 25 DEG C～65 DEG C
Change between 0.5%～92%, the response time is 0.05s, meets the requirement that liquid crystal display picture shows.
Embodiment 4
The present embodiment provides a kind of photo polymerization monomer obtaining using embodiment 1 to react with polyethers, light trigger to obtain
Thermally lightadjusting material, and the local backlight adjusting film based on this thermally lightadjusting material.
In the present embodiment, thermally lightadjusting material is by the photo polymerization monomer of embodiment 1, PPG 3000 (i.e. molecular weight
PPG for 3000, purchased from Guangzhou Wen Long Chemical Co., Ltd., model DL3000D) and 2- hydroxy-2-methyl -1-
Phenylacetone reacts under ultraviolet light and obtains, and detailed process is：
By the photo polymerization monomer of embodiment 1, PPG 3000 and 2- hydroxy-2-methyl -1- phenylacetone according to
Molar ratio 5:5:1 ratio mixes, and adds and account for photo polymerization monomer, PPG 3000 and 2- hydroxyl -2- first
Then gained mixed system is passed through film by the tri (propylene glycol) diacrylate of the 0.5% of base -1- phenylacetone gross mass
Machine film on substrate, exposes under the high-pressure sodium lamp for 1200w for the power, and away from for 35cm, the time for exposure is 10s to lamp, obtains thickness
Spend the thermally lightadjusting material film for 800 μm.
Above-mentioned thermally lightadjusting material film is taken off from substrate, its light transmittance variation with temperature situation is tested,
Result is essentially identical with the thermally lightadjusting material film of embodiment 2 gained, and the response time of change is 0.05s.
Using above-mentioned thermally lightadjusting material film as the thermic light modulation layer of local backlight adjusting film, cover thereon and pass through micro- electricity
The heating unit that road controls, obtains local backlight adjusting film.Wherein, tin indium oxide is included by the heating unit that microcircuit controls
Film and the multiple micro-transistors control circuits needing arrangement according to backlight subarea being arranged on indium tin oxide films, and
Micro-transistors control circuit and thermally lightadjusting material film directly contact.Each micro-transistors control circuit independent control thermic
The temperature change of light modulation layer respective regions.The structure of this local backlight adjusting film also can be found in Fig. 7.Based on thermally lightadjusting material
Property, the light transmittance of each backlight subarea of this local backlight adjusting film all can within the temperature range of 25 DEG C～65 DEG C
Change between 0.5%～92%, the response time is 0.05s, meets the requirement that liquid crystal display picture shows.
Embodiment 5
The present embodiment provides a kind of photo polymerization monomer obtaining using embodiment 1 to react with polyethers, light trigger to obtain
Thermally lightadjusting material, and the local backlight adjusting film based on this thermally lightadjusting material.
The thermally lightadjusting material of the present embodiment is with the difference of embodiment 1, the thermally lightadjusting material film finally giving
Thickness is 100 μm.
The light transmittance variation with temperature situation of the thermally lightadjusting material film of the present embodiment is tested, result is：Should
In 25 DEG C to 65 DEG C of temperature range, its light transmittance changes in the range of 0.8% to 92% thermally lightadjusting material film, change
Response time be 0.02s.
Using above-mentioned thermally lightadjusting material film as the thermic light modulation layer of local backlight adjusting film, cover thereon and pass through micro- electricity
The heating unit that road controls, obtains local backlight adjusting film.Wherein, tin indium oxide is included by the heating unit that microcircuit controls
Film and the multiple micro-transistors control circuits needing arrangement according to backlight subarea being arranged on indium tin oxide films, and
Micro-transistors control circuit and thermally lightadjusting material film directly contact.Each micro-transistors control circuit independent control thermic
The temperature change of light modulation layer respective regions.The structure of this local backlight adjusting film also can be found in Fig. 7.Based on thermally lightadjusting material
Property, the light transmittance of each backlight subarea of this local backlight adjusting film all can within the temperature range of 25 DEG C～65 DEG C
Change between 0.8%～92%, the response time is 0.02s, compared with the local backlight adjusting film of embodiment 1, the response time becomes
Short, but the value of the minimum light transmittance that can reach increases.
Embodiment 6
The present embodiment provides a kind of photo polymerization monomer obtaining using embodiment 1 to react with polyethers, light trigger to obtain
Thermally lightadjusting material, and the local backlight adjusting film based on this thermally lightadjusting material.
The thermally lightadjusting material of the present embodiment is with the difference of embodiment 1, the thermally lightadjusting material film finally giving
Thickness is 1mm.
The light transmittance variation with temperature situation of the thermally lightadjusting material film of the present embodiment is tested, result is：Should
In 25 DEG C to 65 DEG C of temperature range, its light transmittance changes in the range of 0.2% to 92% thermally lightadjusting material film, change
Response time be 0.08s.
Using above-mentioned thermally lightadjusting material film as the thermic light modulation layer of local backlight adjusting film, cover thereon and pass through micro- electricity
The heating unit that road controls, obtains local backlight adjusting film.Wherein, tin indium oxide is included by the heating unit that microcircuit controls
Film and the multiple micro-transistors control circuits needing arrangement according to backlight subarea being arranged on indium tin oxide films, and
Micro-transistors control circuit and thermally lightadjusting material film directly contact.Each micro-transistors control circuit independent control thermic
The temperature change of light modulation layer respective regions.The structure of this local backlight adjusting film also can be found in Fig. 7.Based on thermally lightadjusting material
Property, the light transmittance of each backlight subarea of this local backlight adjusting film all can within the temperature range of 25 DEG C～65 DEG C
Change between 0.2%～92%, the response time is 0.08s, and compared with the local backlight adjusting film of embodiment 1, the response time has
Increased, but the value of the minimum light transmittance that can reach is reduced.
To sum up, the embodiment of the present invention changes this spy based on the light transmission variation with temperature of thermally lightadjusting material
Point, by thermoluminescence materials application in the local backlight of liquid crystal display is adjusted, there is provided a kind of local backlight adjusting film.
This local backlight adjusting film is arranged in backlight module, it is possible to achieve accurate local backlight is adjusted, improves liquid crystal display and set
The contrast of standby display picture and grey exponent number, reduce ghost simultaneously, improve the display effect of liquid crystal display.Particularly right
In sidelight type backlight module, after sidelight type backlight module is applied local backlight adjusting film provided in an embodiment of the present invention, both
Remain the little advantage of sidelight type backlight module thickness, overcome existing sidelight type backlight module again and be only capable of embarking on journey or adjust in column
The problem of section backlight, it is achieved that the accurate local backlight of sidelight type backlight module is adjusted, is conducive to the ultra-thin of liquid crystal display
Ultra-narrowization designs.
The above is for only for ease of those skilled in the art and understands technical scheme, not in order to limit
The present invention.All any modification, equivalent substitution and improvement within the spirit and principles in the present invention, made etc., should be included in this
Within the protection domain of invention.
Claims (10)
1. a kind of local backlight adjusting film is it is characterised in that include：The thermic light modulation layer (1) being formed by thermally lightadjusting material, with
And it is arranged on the multiple heating units (2) controlling by microcircuit on described thermic light modulation layer (1)；
The heating unit (2) being controlled by microcircuit described in each is respectively used to control the preset areas of described thermic light modulation layer (1)
The temperature in domain.
2. local backlight adjusting film according to claim 1 is it is characterised in that described thermally lightadjusting material is by photopolymerization list
Body, polyethers and light trigger are polymerized formation under illumination condition.
3. local backlight adjusting film according to claim 2 it is characterised in that the chemical constitution of described photo polymerization monomer such as
Under：
Described light trigger is alpha-alcohol ketone photoinitiator.
4. local backlight adjusting film according to claim 3 is it is characterised in that described light trigger is 2- hydroxyl -2- first
Base -1- phenylacetone；The molecular weight of described polyethers is 1000～3000.
5. local backlight adjusting film according to claims 2 to 4 is it is characterised in that described photo polymerization monomer, described polyethers
And the molar ratio of described light trigger is (4～5)：5：(0.1～1).
6. local backlight adjusting film according to claim 3 is it is characterised in that the thickness of described thermic light modulation layer (1) is
200 μm～800 μm.
7. local backlight adjusting film according to claim 1 is it is characterised in that the described heating list being controlled by microcircuit
First (2) include：Cover the micro-transistors control circuit on described thermic light modulation layer (1) and cover in described minicrystal
Indium tin oxide films in pipe control circuit.
8. a kind of backlight module, including：
Reflector plate (300),
Light guide plate (200) above described reflector plate (300),
Positioned at the light source (400) of described light guide plate (200) at least one side,
And,
Blooming piece (500) above described light guide plate (200)；
It is characterized in that, described backlight module also includes：Between described light guide plate (200) and described blooming piece (500)
The local backlight adjusting film (100) described in any one of claim 1～7.
9. a kind of backlight module, including：
Reflector plate (300),
Light source (400) above described reflector plate (300),
Diffuser plate (600) above described light source (400),
And,
Blooming piece (500) above described diffuser plate (600)；
It is characterized in that, described backlight module also includes：Between described diffuser plate (600) and described blooming piece (500)
The local backlight adjusting film (100) described in any one of claim 1～7.
10. a kind of liquid crystal display is it is characterised in that include the backlight module described in claim 8 or claim 9.
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