CN104155714B - Optical structure and preparation method thereof, backlight module, and display device - Google Patents
Optical structure and preparation method thereof, backlight module, and display device Download PDFInfo
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- CN104155714B CN104155714B CN201410327996.7A CN201410327996A CN104155714B CN 104155714 B CN104155714 B CN 104155714B CN 201410327996 A CN201410327996 A CN 201410327996A CN 104155714 B CN104155714 B CN 104155714B
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Abstract
The invention relates to an optical structure and a preparation method thereof, a backlight module, and a display device. The optical structure comprises a light guide layer and an optical film layer; the optical film layer comprises a quarter-wave plate and a reflective layer respectively arranged on the two sides of the light guide layer, as well as a first cholesteric liquid crystal layer arranged between the quarter-wave plate and the light guide layer; the pitch rotation direction of cholesteric liquid crystal in the first cholesteric liquid crystal layer is leftward, and the first cholesteric liquid crystal layer allows the rightward-rotation circularly polarized light to transmit, and can reflect leftward-rotation circularly polarized light to the reflective layer; or the pitch rotation direction of cholesteric liquid crystal in the first cholesteric liquid crystal layer is rightward, the first cholesteric liquid crystal layer allows the leftward-rotation circularly polarized light to transmit, and can reflect rightward-rotation circularly polarized light to the reflective layer. The optical structure has higher light transmittance and effective utilization rate, and is lower in production cost, and smaller in thickness.
Description
Technical field
The present invention relates to technical field of liquid crystal display, in particular it relates to a kind of optical texture and preparation method thereof, including upper
State the backlight module and the display device including above-mentioned backlight module of optical texture.
Background technology
In liquid crystal display, light source to light guide plate emits beam, and makes light guide plate become area source.Light guide plate is to display floater
Emit beam, the light sequentially passes through lower polarizer, the liquid crystal layer between array base palte and color membrane substrates, upper polarizer.
Specifically, as shown in figure 1, the light can be broken down into the P light and with the plane of incidence vertical S light parallel with the plane of incidence；In light
During through lower polarizer, P light can pass through lower polarizer, S light then can be absorbed by lower polarizer, make light losing substantial amounts of bright
Degree, causes the effective rate of utilization of light relatively low, and causes the brightness shown by display floater relatively low.
Fig. 2 is the schematic diagram of existing light guide plate and the optical film material being arranged on light guide plate.The light guide plate is by being located at
Dual brightness enhancement film (Dual Brightness Enhancement Film, hereinafter referred to as DBEF) above it and set
Reflecting layer in below solves the problems, such as that the brightness shown by the effective rate of utilization and display floater of light is low.Specifically,
The top of light guide plate 1 is sequentially provided with diffusion sheet 2, prism film 3 and DBEF4, and lower section is provided with reflecting layer 5.As shown in figure 3, DBEF4 is allowed
P light transmissions, by S light light guide plate 1 is reflected towards；Through the reflection in reflecting layer 5, the S light is changed into P light and S light, and again directive shows
Panel, P light therein can again be reflected towards light guide plate 1 through DBEF4 and lower polarizer, S light.Thus, through repeatedly anti-
Penetrate, the S light for being absorbed by lower polarizer originally is constantly converted into P light and S light, and P light therein can pass through lower polarizer
Directive display floater, so as to improve the effective rate of utilization of light, increases the brightness shown by display floater.
But in actual applications, because the technology of DBEF4 is mainly rested in Minnesota Mining and Manufacturing Company's hand, and its preparation process compared with
For complexity so that the price of DBEF4 is partially expensive, so as to the relatively costly of light guide plate can be caused.Additionally, above-mentioned light guide plate and being arranged at
Thereon, the thickness sum of the various membrane materials of lower surface is about 500 μm, and its thickness is bigger than normal.
The content of the invention
It is contemplated that at least solving one of technical problem present in prior art, it is proposed that a kind of optical texture and its
Preparation method, backlight module and display device, the optical texture can improve the transmitance of light, so as to improve having for light
Effect utilization rate, and with relatively low preparation cost, and with less thickness.
A kind of optical texture is provided to realize the purpose of the present invention, including optical waveguide layer and optical film, the blooming
Layer includes the quarter-wave plate of the both sides for being respectively arranged on optical waveguide layer and reflecting layer, and located at the quarter-wave plate and institute
State the first cholesteric crystal layer between optical waveguide layer；The pitch rotation side of the cholesteric liquid crystal in first cholesteric crystal layer
To for left-handed, first cholesteric crystal layer allows right-hand circular polarization light transmission, and can be reflected towards left circularly polarized light
The reflecting layer；Or the pitch direction of rotation of the cholesteric liquid crystal in first cholesteric crystal layer is dextrorotation, described the
One cholesteric crystal layer allows Left-hand circular polarization light transmission, and right-circularly polarized light can be reflected towards into the reflecting layer.
Preferably, the optical waveguide layer is polymer dispersed liquid crystal layer, and the polymer dispersed liquid crystal layer is prepared in the first base
On plate.
Preferably, the optical texture also includes second substrate, the second substrate and first cholesteric crystal layer
Respectively positioned at the both sides of the quarter-wave plate；The optical film also includes dichroism layer, and the dichroism layer sets
Between the second substrate and the quarter-wave plate.
Preferably, the reflecting layer is relative with the first cholesteric crystal layer side on the optical waveguide layer
Metal level on opposite side.
Preferably, the reflecting layer includes the 3rd substrate and the second cholesteric crystal layer, the 3rd substrate and described the
Respectively positioned at the both sides of the optical waveguide layer, second cholesteric crystal layer is arranged on the 3rd substrate to one cholesteric crystal layer
And the optical waveguide layer between, the pitch direction of rotation of the cholesteric liquid crystal in second cholesteric crystal layer includes the left-handed and right side
Rotation, for left circularly polarized light and right-circularly polarized light to be reflected towards into the optical waveguide layer.
Used as another technical scheme, the present invention also provides a kind of preparation method of optical texture, for preparing the present invention
The above-mentioned optical texture for providing, the preparation method of the optical texture includes：
Prepare optical waveguide layer；
By optical waveguide layer and quarter-wave plate to box；
To arranging the first cholesteric crystal layer between the optical waveguide layer and the quarter-wave plate；
Reflecting layer is set, and the optical waveguide layer is located between the quarter-wave plate and the reflecting layer；
Wherein, first cholesteric crystal layer allows right-hand circular polarization light transmission, and can be anti-by left circularly polarized light
Reflecting layer described in directive；Or, first cholesteric crystal layer allows Left-hand circular polarization light transmission, and can be inclined by dextrorotation circle
The light that shakes is reflected towards the reflecting layer.
Preferably, the optical waveguide layer is prepared according to following methods：
S10, offer first substrate；
S11, the side of first substrate surface arrange polymer dispersed liquid crystal layer.
Preferably polymer dispersed liquid crystal layer is set on the first substrate by following methods：
S20, in the surface coated with adhesive of the first side of first substrate；
S21, by first substrate and tetrabasal to box, and make the first side of first substrate relative with tetrabasal；And
Therebetween the mixture that injection nematic liquid crystal, polymerisable monomer and light trigger are mixed by preset ratio；
S22, the said mixture irradiated between injection first substrate and tetrabasal using ultraviolet so as to solidify, obtain
Obtain polymer dispersed liquid crystal layer；
S23, tetrabasal and polymer dispersed liquid crystal layer are peeled off.
Preferably, in the optical waveguide layer with the quarter-wave plate to box the step of before, carry out following step：
S30, offer second substrate；
S31, on the surface of the side of second substrate prepare dichroism layer；
S32, second substrate and quarter-wave plate are fitted, and make dichroism layer be located at second substrate and a quarter
Between wave plate.
Preferably, first cholesteric is set between the optical waveguide layer and the quarter-wave plate by following methods
Phase liquid crystal layer：
S40, to injecting left-handed or dextrorotation chiral ionic liquid, nematic phase liquid between optical waveguide layer and quarter-wave plate
Brilliant, polymerisable monomer and light trigger press the mixed mixture of preset ratio；
S41, carry out ultraviolet light to injecting the said mixture between optical waveguide layer and quarter-wave plate so as to Gu
Change.
Preferably, reflecting layer is prepared on optical waveguide layer according to following methods：
S50, the 3rd substrate of offer；
S51, by the 3rd substrate and optical waveguide layer to box；
S52, to inject between the 3rd substrate and optical waveguide layer left-handed chiral ionic liquid, the chiral ionic liquid of dextrorotation,
The mixture that nematic liquid crystal, polymerisable monomer and light trigger are mixed by preset ratio；
S53, ultraviolet irradiation is carried out to injecting the said mixture between the 3rd substrate and optical waveguide layer, solidified, obtained
The second cholesteric crystal layer is obtained, as reflecting layer.
Preferably, reflecting layer is prepared on optical waveguide layer according to following methods：
Layer of metal is deposited on the surface of the side of optical waveguide layer, as reflecting layer, and the reflecting layer and the first cholesteric phase liquid
Crystal layer is respectively positioned at the both sides of the optical waveguide layer.
Used as another technical scheme, the present invention also provides a kind of backlight module, including light source and optical texture, the light
The above-mentioned optical texture that structure is provided using the present invention is learned, or, the above-mentioned optics that the optical texture is provided using the present invention
The preparation method manufacture of structure；The light source is located at the one or both sides of the optical waveguide layer of the optical texture.
Used as another technical scheme, the present invention also provides a kind of display device, including backlight module, array base palte and right
Box substrate, the array base palte and described to being provided with liquid crystal layer between box substrate, the backlight module is provided using the present invention
Above-mentioned backlight module, and the backlight module connects with the array base palte.
The invention has the advantages that：
The optical texture that the present invention is provided, its first cholesteric crystal layer makes the left-handed circle in the light that optical waveguide layer sends inclined
The light (right-circularly polarized light) that shakes is passed through, and right-circularly polarized light (left circularly polarized light) reflection in the light that optical waveguide layer is sent
To reflecting layer so as to constantly reflected between the first cholesteric crystal layer and reflecting layer, and in the process, dextrorotation circle
Polarised light (left circularly polarized light) is constantly converted into left circularly polarized light (right-circularly polarized light), such that it is able to send out optical waveguide layer
The most of light for going out can pass through the first cholesteric crystal layer, improve the transmitance and effective rate of utilization of light.Also, with it is existing
There is technology to compare, DBEF is not included in the optical texture that the present invention is provided so as to which preparation cost is relatively low.Additionally, and prior art
Compare, the thickness of the optical texture that the present invention is provided is relatively low, so as to contribute to reducing the thickness of display device.
The preparation method of the optical texture that the present invention is provided, the first cholesteric crystal layer of its optical texture prepared makes
Left circularly polarized light (right-circularly polarized light) in the light that optical waveguide layer sends is passed through, and the right side in the light that optical waveguide layer is sent
Rounding polarised light (left circularly polarized light) is reflected towards reflecting layer so as between the first cholesteric crystal layer and reflecting layer constantly
Reflected, and in the process, right-circularly polarized light (left circularly polarized light) is constantly converted into left circularly polarized light (dextrorotation
Circularly polarized light), the most of light such that it is able to send optical waveguide layer passes through the first cholesteric crystal layer, improves light
Transmitance and effective rate of utilization.Also, compared with prior art, do not include DBEF in above-mentioned optical texture so as to preparation cost
It is relatively low.Additionally, compared with prior art, the thickness of above-mentioned optical texture is relatively low, so as to contribute to reducing the thickness of display device.
The backlight module that the present invention is provided, it adopts the above-mentioned optical texture of present invention offer, or using by above-mentioned optics
The optical texture that the preparation method of structure is prepared, can make its light for sending have higher transmitance and effectively utilizes
Rate, also, preparation cost is reduced, and, reduce thickness.
The present invention provide display device, its adopt the present invention offer above-mentioned backlight module, can make light have compared with
High transmitance and effective rate of utilization, also, contribute to reducing the manufacturing cost of display device, and, contribute to reducing showing
The thickness of device.Further, since above-mentioned backlight module directly provides linearly polarized light, therefore the display device provided in the present embodiment
In, polaroid need not be set between array base palte and backlight module.
Description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute the part of specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 sequentially passes through the schematic diagram of lower polarizer and upper polarizer for light；
Fig. 2 is the schematic diagram of existing light guide plate and the optical film material being arranged on light guide plate；
Fig. 3 is schematic diagram of the light through light guide plate shown in Fig. 2；
Fig. 4 is the schematic diagram of optical texture provided in an embodiment of the present invention；
Fig. 5 is arranged on the schematic diagram of optical waveguide layer both sides for light source；
Fig. 6 is schematic diagram that reflecting layer is metal level positioned at optical waveguide layer side.
Description of reference numerals
1：Light guide plate；2：Diffusion sheet；3：Prism film；4：DBEF；5 reflecting layer；
10：Optical texture；11：Optical waveguide layer；12：Optical film；13：Quarter-wave plate；14：Reflecting layer；15：First courage
Steroid phase liquid crystal layer；16：Light source；17：First substrate；18：Second substrate；19：Dichroism layer；20：3rd substrate；21：Second
Cholesteric crystal layer.
Specific embodiment
The specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing.It should be appreciated that this place is retouched
The specific embodiment stated is merely to illustrate and explains the present invention, is not limited to the present invention.
Fig. 4 is the schematic diagram of optical texture provided in an embodiment of the present invention.As shown in figure 4, optical texture 10 includes leaded light
Layer 11 and optical film 12, wherein, optical film 12 includes the He of quarter-wave plate 13 of the both sides for being respectively arranged on optical waveguide layer 11
Reflecting layer 14, and the first cholesteric crystal layer 15 between quarter-wave plate 13 and optical waveguide layer 11.Specifically, at this
In embodiment, the pitch direction of rotation of the cholesteric liquid crystal in the first cholesteric crystal layer 15 is left-handed, i.e. the first cholesteric phase liquid
Crystal layer 15 allows right-hand circular polarization light transmission, and left circularly polarized light can be reflected towards into reflecting layer 14；Or, the first cholesteric phase
The pitch direction of rotation of the cholesteric liquid crystal in liquid crystal layer 15 is dextrorotation, i.e. the first cholesteric crystal layer 15 allows left-handed circle inclined
Shake light transmission, and right-circularly polarized light can be reflected towards reflecting layer 14.Preferably, the thickness of the first cholesteric crystal layer 15 is
20μm。
As shown in figure 5, the one or both sides of optical waveguide layer 11 are provided with light source 16, the light source 16 is to the irradiation light of optical waveguide layer 11
Line, makes optical waveguide layer 11 become area source, to quarter-wave plate 13 and the transmitting of reflecting layer 14 light.In the present embodiment, such as Fig. 4
With shown in Fig. 5, with quarter-wave plate 13 relative to optical waveguide layer 11 position and direction as " on ", with reflecting layer 14 relative to leading
The position and direction of photosphere 11 is D score.
When the light sent in optical waveguide layer 11 is directed upwardly toward the first cholesteric crystal layer 15, with the first cholesteric crystal layer 15
In cholesteric liquid crystal pitch direction of rotation be dextrorotation as a example by, it makes the Left-hand circular polarization light transmission in light, is directed upwardly toward
Quarter-wave plate 13；And the right-circularly polarized light in light is reflected down to optical waveguide layer 11 and reflecting layer 14.
For the left circularly polarized light for being directed upwardly toward quarter-wave plate 13, quarter-wave plate 13 is by the Left-hand circular polarization
Light is converted into linearly polarized light.When the optical texture that the present embodiment is provided is used for liquid crystal indicator, the linearly polarized light directive shows
Show panel, in the liquid crystal layer of display floater, the yawing moment of the linearly polarized light produces deflection according to the angle of liquid crystal molecule,
So that display floater can be with display picture.Preferably, in the present embodiment, the thickness of quarter-wave plate 13 is 20 μm.
For the light downwardly toward reflecting layer 14 is (including the light downwardly toward reflecting layer 14 sent by optical waveguide layer 11
Line, and the first cholesteric crystal layer 15 is reflected down the right-circularly polarized light to optical waveguide layer 11 and reflecting layer 14), reflecting layer 14
It is reflected towards the cholesteric crystal layer 15 of optical waveguide layer 11 and first.Also, for first cholesteric crystal layer 15 is reflected down
Right-circularly polarized light, after reflecting layer 14 is reflected towards the cholesteric crystal layer 15 of optical waveguide layer 11 and first, it is changed into including a left side
The light of rounding polarised light and right-circularly polarized light.
Understood according to above-mentioned, in above-mentioned optical texture 10, the first cholesteric crystal layer 15 makes optical waveguide layer 11 project upwards
Light in Left-hand circular polarization light transmission, and right-circularly polarized light therein is reflected towards into reflecting layer 14, the right-hand circular polarization
Light can constantly be reflected between the first cholesteric crystal layer 15 and reflecting layer 14, and every time justify dextrorotation in reflecting layer 14
When polarised light is reflected towards the first cholesteric crystal layer 15, the right-circularly polarized light is constantly converted into can pass through the first cholesteric phase
The left circularly polarized light of liquid crystal layer 15, makes most of light that optical waveguide layer 11 sends may be passed through the first cholesteric crystal layer
15, and linearly polarized light is converted into by quarter-wave plate 13, so as to improve the transmitance of light, and effective rate of utilization.
When the pitch direction of rotation of the cholesteric liquid crystal in the first cholesteric crystal layer 15 is left-handed, it is made in light
Right-hand circular polarization light transmission, and left circularly polarized light is reflected towards into reflecting layer 14, the left circularly polarized light is constantly in the first courage
Reflected between steroid phase liquid crystal layer 15 and reflecting layer 14, its process is similar to the above, finally made the big portion that optical waveguide layer 11 sends
Light splitter can pass through the first cholesteric crystal layer 15, and be converted into linearly polarized light by quarter-wave plate 13.
In the present embodiment, optical waveguide layer 11 is the PDLC (Polymer being prepared on first substrate 17
Dispersed Liquid Crystal, hereinafter referred to as PDLC) layer.Preferably, in the present embodiment, the thickness of PDLC layer is
10 μm, the thickness of first substrate 17 is 40 μm.
In the present embodiment, optical texture 10 also includes second substrate 18, the cholesteric liquid crystal of second substrate 18 and first
Layer 15 is respectively positioned at the both sides of quarter-wave plate 13；Optical film also includes dichroism layer 19, and the dichroism layer 19 sets
Between second substrate 18 and quarter-wave plate 13.Specifically, dichroism layer 19 is prepared on second substrate 18.When four points
One of wave plate 13 when light is converted into into linearly polarized light directive top, through dichroism layer 19, the dichroism layer 19 can be with
Improve the degree of polarization of linearly polarized light.Preferably, in the present embodiment, the thickness of second substrate 18 is 40 μm, dichroism layer 19
Thickness be 30 μm.
In the present embodiment, reflecting layer 14 includes the 3rd substrate 20 and the second cholesteric crystal layer 21, the He of the 3rd substrate 20
Respectively positioned at the both sides of optical waveguide layer 11, the second cholesteric crystal layer 21 is arranged on the He of the 3rd substrate 20 to first cholesteric crystal layer 15
Between optical waveguide layer 11, also, the pitch direction of rotation of the cholesteric liquid crystal in the second cholesteric crystal layer 21 includes the left-handed and right side
Rotation, i.e. the second cholesteric crystal layer 21 have wide wave reflection characteristics, and it can be anti-by left circularly polarized light and right-circularly polarized light
Directive optical waveguide layer 11.Preferably, the thickness of the 3rd substrate 20 is 40 μm, and the thickness of the second cholesteric crystal layer 21 is 20 μm.
In the present embodiment, the thickness sum of each layer of optical texture 10 is 220 μm, and light guide plate of the prior art and light
The thickness for learning film layer is about 500 μm, and the thickness of polaroid is about 130 μm, it follows that compared to existing technology, this enforcement
The thickness of the optical texture 10 that example is provided reduces about 400 μm, and its thickness significantly reduces, and then contributes to reducing display device
Thickness.
In sum, the optical texture 10 that the present embodiment is provided, its first cholesteric crystal layer 15 sends optical waveguide layer 11
Light in left circularly polarized light (right-circularly polarized light) pass through, and the right-hand circular polarization in the light that optical waveguide layer 11 is sent
Light (left circularly polarized light) is reflected towards reflecting layer 14 so as to constantly enter between the first cholesteric crystal layer 15 and reflecting layer 14
Row reflection, and in the process, right-circularly polarized light (left circularly polarized light) is constantly converted into left circularly polarized light, and (dextrorotation is justified
Polarised light), the most of light such that it is able to send optical waveguide layer 11 passes through the first cholesteric crystal layer 15, improves light
Transmitance and effective rate of utilization.Also, do not include in the optical texture 10 that compared with prior art, the present embodiment is provided
DBEF so as to which preparation cost is relatively low.Additionally, compared with prior art, the thickness of the optical texture 10 that the present embodiment is provided is relatively low,
So as to contribute to reducing the thickness of display device.
It should be noted that in the present embodiment, reflecting layer 14 includes the 3rd substrate 20 and the second cholesteric crystal layer 21,
But the present invention is not limited to this, in actual applications, reflecting layer 14 can also be on optical waveguide layer 11 with the first cholesteric phase
The metal level of the relative opposite side of the side of liquid crystal layer 15, as shown in Figure 6；In light directive metal level from top to bottom,
Light is reflected towards upwards optical waveguide layer 11 by the metal level.Specifically, it is to be prepared on first substrate 17 in optical waveguide layer 11
During PDLC layer, the metal level is prepared on first substrate 17, and it may be located between first substrate 17 and PDLC layer, such as Fig. 6 institutes
Show；Meanwhile, it can also be with PDLC layer respectively positioned at the both sides of first substrate 17.
Used as another technical scheme, the embodiment of the present invention also provides a kind of preparation method of optical texture, and it is used to make
The optical texture 10 that standby the above embodiment of the present invention is provided.Specifically, the preparation method of the optical texture comprises the steps：
Prepare optical waveguide layer 11；
By optical waveguide layer 11 and quarter-wave plate 13 to box；
To arranging the first cholesteric crystal layer 15 between optical waveguide layer 11 and quarter-wave plate 13；
Reflecting layer 14 is set, and optical waveguide layer 11 is located between quarter-wave plate 13 and reflecting layer 14；
Wherein, the first cholesteric crystal layer 15 allows right-hand circular polarization light transmission, and can reflect left circularly polarized light
To reflecting layer 14；Or, the first cholesteric crystal layer 15 allows Left-hand circular polarization light transmission, and can be anti-by right-circularly polarized light
Directive reflecting layer 14.
According to optical texture 10 prepared by said method, its first cholesteric crystal layer 15 makes the light that optical waveguide layer 11 sends
In left circularly polarized light (right-circularly polarized light) pass through, and right-circularly polarized light in the light that optical waveguide layer 11 is sent is (left
Rounding polarised light) it is reflected towards reflecting layer 14 so as to constantly carry out between the first cholesteric crystal layer 15 and reflecting layer 14 anti-
Penetrate, and in the process, right-circularly polarized light (left circularly polarized light) is constantly converted into left circularly polarized light (right-hand circular polarization
Light), the most of light such that it is able to send optical waveguide layer 11 passes through the first cholesteric crystal layer 15, improves the saturating of light
Cross rate and effective rate of utilization.Also, compared with prior art, do not include DBEF in above-mentioned optical texture 10 so as to preparation cost
It is relatively low.Additionally, compared with prior art, the thickness of above-mentioned optical texture 10 is relatively low, so as to contribute to reducing the thickness of display device
Degree.
Specifically, in the step of preparing optical waveguide layer 11, according to following methods optical waveguide layer 11 is prepared：
S10, offer first substrate 17；
S11, the side of first substrate 17 surface arrange PDLC (PDLC) layer.
Further, in above-mentioned steps S11, PDLC layer is set on first substrate 17 by following methods：
S20, in the surface coated with adhesive of the first side of first substrate 17；
S21, by first substrate 17 and tetrabasal to box, and make the first side of first substrate 17 relative with tetrabasal；
And the mixture that between injection nematic liquid crystal, polymerisable monomer and light trigger are mixed by preset ratio；
S22, the said mixture irradiated between injection first substrate 17 and tetrabasal using ultraviolet so as to solidify,
Obtain polymer dispersed liquid crystal layer；
S23, tetrabasal and polymer dispersed liquid crystal layer are peeled off.
In the present embodiment, specifically, before the step of optical waveguide layer 11 and quarter-wave plate 13 are to box, carry out following
Step：
S30, offer second substrate 18；
S31, prepare on the surface of the side of second substrate 18 dichroism layer 19；
S32, second substrate 18 and quarter-wave plate 13 are fitted, and make dichroism layer 19 be located at the He of second substrate 18
Between quarter-wave plate 13.
By above-mentioned steps S31-S32, dichroism layer 19 is obtained in the side of quarter-wave plate 13, so as to incite somebody to action
Quarter-wave plate 13 and optical waveguide layer 11 are prepared after optical texture 10 to box, in quarter-wave plate 13 that left-handed circle is inclined
Shake light or when right-circularly polarized light is converted into linearly polarized light and projects upwards, be prepared in the side of second substrate 18 surface two to
Color layer 19 can improve the degree of polarization of linearly polarized light.
In the step of by optical waveguide layer 11 and quarter-wave plate 13 to box, by arranging default size therebetween at it
Glass microballoon controlling the size in its gap therebetween.In the present embodiment, optical waveguide layer 11 is controlled by glass microballoon
It it is 20 μm with the gap between quarter-wave plate 13.
In the step of the first cholesteric crystal layer 15 are set between optical waveguide layer 11 and quarter-wave plate 13, by under
State method and the first cholesteric crystal layer 15 is set between optical waveguide layer 11 and quarter-wave plate 13：
S40, to injecting left-handed or dextrorotation chiral ionic liquid, nematic phase between optical waveguide layer 11 and quarter-wave plate 13
Liquid crystal, polymerisable monomer and light trigger press the mixed mixture of preset ratio；
S41, carry out ultraviolet light to injecting the said mixture between optical waveguide layer 11 and quarter-wave plate 13 so as to
Solidification.
Specifically, in step s 40, the direction of the pitch rotation of the first cholesteric crystal layer 15 for preparing as needed,
Choose the chiral ionic liquid of corresponding left-handed rear dextrorotation.For example, it is the first left-handed cholesteric phase pitch direction of rotation is prepared
During liquid crystal layer 15, left-handed chiral ionic liquid is chosen；Conversely, preparing first cholesteric phase liquid of the pitch direction of rotation for dextrorotation
During crystal layer 15, then the chiral ionic liquid of dextrorotation is chosen.
Preferably, in step S41, when ultraviolet light is carried out to said mixture, the temperature of said mixture is high
In the phase transition temperature of the cholesteric phase-smectic C of liquid crystal, and its difference therebetween is less than 10 degree.
In the step of preparing reflecting layer 14, reflecting layer 14 is prepared on optical waveguide layer 11 according to following methods：
S50, the 3rd substrate 20 of offer；
S51, by the 3rd substrate 20 with optical waveguide layer 11 to box；
S52, to the chiral ion liquid that left-handed chiral ionic liquid, dextrorotation are injected between the 3rd substrate 20 and optical waveguide layer 11
The mixture that body, nematic liquid crystal, polymerisable monomer and light trigger are mixed by preset ratio；
S53, ultraviolet irradiation is carried out to injecting the said mixture between the 3rd substrate 20 and optical waveguide layer 11, consolidate
Change, the second cholesteric crystal layer 21 is obtained, as reflecting layer 14.
In step s 51, controlled by arranging the glass microballoon of default size between the 3rd substrate 20 and optical waveguide layer 11
Make the size in its gap therebetween.In the present embodiment, by glass microballoon control the 3rd substrate 20 and optical waveguide layer 11 it
Between gap be 20 μm.
Preferably, in step S53, when ultraviolet light is carried out to said mixture, the temperature of said mixture is high
In the phase transition temperature of the cholesteric phase-smectic C of liquid crystal, and its difference therebetween is less than 10 degree.
It should be noted that in the present embodiment, by preparing the second courage between the substrate 20 of first substrate 17 and the 3rd
Steroid phase liquid crystal layer 21 is obtaining reflecting layer 14, but the present invention is not limited to this, in actual applications, can be with optical waveguide layer 11
The surface deposition layer of metal of side, using the metal level as reflecting layer 14, and the cholesteric crystal layer of reflecting layer 14 and first
15 respectively positioned at the both sides of optical waveguide layer 11.Specifically, when optical waveguide layer 11 is PDLC layer, before step S11, first first
The metal level as reflecting layer 14 is prepared on the surface of the side of substrate 17, step S11 is then carried out, and is located at reflecting layer 14
Between first substrate 17 and PDLC layer, or make reflecting layer 14 with PDLC layer respectively positioned at the both sides of first substrate 17.
Used as another technical scheme, the embodiment of the present invention also provides a kind of backlight module, including light source and optical texture,
Wherein, the optical texture that optical texture is provided using the above embodiment of the present invention, or, optical texture adopts above-mentioned reality of the invention
Apply the optical texture that the preparation method of the optical texture of example offer is prepared；Light source is located at the side of the optical waveguide layer of the optical texture
Or both sides.
Backlight module provided in an embodiment of the present invention, it adopts the optical texture that the above embodiment of the present invention is provided, or
There is the preparation method manufacture of the optical texture of the above embodiment of the present invention offer so as to which the light for sending has higher transmitance
And effective rate of utilization, also, preparation cost is reduced, and, reduce thickness.
Used as another technical scheme, the embodiment of the present invention also provides a kind of display device, including backlight module, array base
Plate and to box substrate, wherein, array base palte and to being provided with liquid crystal layer between box substrate, backlight module adopts above-mentioned enforcement of the invention
The backlight module that example is provided, and the backlight module connects with array base palte.
Display device provided in an embodiment of the present invention, it adopts the backlight module that the above embodiment of the present invention is provided, makes light
Line has higher transmitance and effective rate of utilization, also, contributes to reducing the manufacturing cost of display device, and, contribute to
Reduce the thickness of display device.Further, since above-mentioned backlight module directly provides linearly polarized light, therefore in the present embodiment offer
In display device, polaroid need not be set between array base palte and backlight module.
It is understood that the embodiment of above principle being intended to be merely illustrative of the present and the exemplary enforcement for adopting
Mode, but the invention is not limited in this.For those skilled in the art, in the essence without departing from the present invention
In the case of god and essence, various modifications and improvement can be made, these modifications and improvement are also considered as protection scope of the present invention.
Claims (11)
1. a kind of optical texture, including optical waveguide layer and optical film, it is characterised in that the optical film includes being respectively arranged on leading
The quarter-wave plate of the both sides of photosphere and reflecting layer, and between the quarter-wave plate and the optical waveguide layer
One cholesteric crystal layer；
The pitch direction of rotation of the cholesteric liquid crystal in first cholesteric crystal layer is left-handed, first cholesteric liquid crystal
Layer allows right-hand circular polarization light transmission, and left circularly polarized light can be reflected towards into the reflecting layer；Or
The pitch direction of rotation of the cholesteric liquid crystal in first cholesteric crystal layer be dextrorotation, first cholesteric liquid crystal
Layer allows Left-hand circular polarization light transmission, and right-circularly polarized light can be reflected towards into the reflecting layer；
The reflecting layer includes the 3rd substrate and the second cholesteric crystal layer, the 3rd substrate and first cholesteric liquid crystal
Respectively positioned at the both sides of the optical waveguide layer, second cholesteric crystal layer is arranged on the 3rd substrate and the optical waveguide layer to layer
Between；
The pitch direction of rotation of the cholesteric liquid crystal in second cholesteric crystal layer includes left-handed and dextrorotation, for will be left-handed
Circularly polarized light and right-circularly polarized light are reflected towards the optical waveguide layer；
The optical texture also includes second substrate, and the second substrate is located at respectively described with first cholesteric crystal layer
The both sides of quarter-wave plate；
The optical film also includes dichroism layer, and the dichroism layer is located at the second substrate and a quarter
Between wave plate.
2. optical texture according to claim 1, it is characterised in that the optical waveguide layer be prepared in it is poly- on first substrate
Compound dispersing liquid crystal layer.
3. optical texture according to claim 1, it is characterised in that the reflecting layer be on the optical waveguide layer with
Metal level on the relative opposite side of first cholesteric crystal layer side.
4. a kind of preparation method of optical texture, for preparing the optical texture described in claims 1 to 3 any one, it is special
Levy and be, the preparation method of the optical texture includes：
Prepare optical waveguide layer；
S30, offer second substrate；
S31, on the surface of the side of second substrate prepare dichroism layer；
S32, second substrate and quarter-wave plate are fitted, and make dichroism layer be located at second substrate and quarter-wave plate
Between；
By optical waveguide layer and quarter-wave plate to box；
To arranging the first cholesteric crystal layer between the optical waveguide layer and the quarter-wave plate；
Reflecting layer is set, and the optical waveguide layer is located between the quarter-wave plate and the reflecting layer；
Wherein, first cholesteric crystal layer allows right-hand circular polarization light transmission, and can be reflected towards left circularly polarized light
The reflecting layer；Or, first cholesteric crystal layer allows Left-hand circular polarization light transmission, and can be by right-circularly polarized light
It is reflected towards the reflecting layer.
5. the preparation method of optical texture according to claim 4, it is characterised in that lead according to prepared by following methods
Photosphere：
S10, offer first substrate；
S11, the side of first substrate surface arrange polymer dispersed liquid crystal layer.
6. the preparation method of optical texture according to claim 5, it is characterised in that by following methods in first substrate
Upper setting polymer dispersed liquid crystal layer：
S20, in the surface coated with adhesive of the first side of first substrate；
S21, by first substrate and tetrabasal to box, and make the first side of first substrate relative with tetrabasal；And at the two
Between inject the mixture that nematic liquid crystal, polymerisable monomer and light trigger are mixed by preset ratio；
S22, the said mixture irradiated between injection first substrate and tetrabasal using ultraviolet so as to solidify, gathered
Compound dispersing liquid crystal layer；
S23, tetrabasal and polymer dispersed liquid crystal layer are peeled off.
7. the preparation method of optical texture according to claim 4, it is characterised in that by following methods in the leaded light
First cholesteric crystal layer is set between layer and the quarter-wave plate：
S40, to inject between optical waveguide layer and quarter-wave plate left-handed or dextrorotation chiral ionic liquid, nematic liquid crystal, can
Polymerized monomer and light trigger press the mixed mixture of preset ratio；
S41, carry out ultraviolet light to injecting the said mixture between optical waveguide layer and quarter-wave plate so as to solidify.
8. the preparation method of optical texture according to claim 4, it is characterised in that according to following methods on optical waveguide layer
Prepare reflecting layer：
S50, the 3rd substrate of offer；
S51, by the 3rd substrate and optical waveguide layer to box；
S52, to injecting left-handed chiral ionic liquid, the chiral ionic liquid of dextrorotation, nematic between the 3rd substrate and optical waveguide layer
The mixture that phase liquid crystal, polymerisable monomer and light trigger are mixed by preset ratio；
S53, ultraviolet irradiation is carried out to injecting the said mixture between the 3rd substrate and optical waveguide layer, solidified, obtain the
Two cholesteric crystal layers, as reflecting layer.
9. the preparation method of optical texture according to claim 4, it is characterised in that according to following methods on optical waveguide layer
Prepare reflecting layer：
Layer of metal is deposited on the surface of the side of optical waveguide layer, as reflecting layer, and the reflecting layer and the first cholesteric crystal layer
Respectively positioned at the both sides of the optical waveguide layer.
10. a kind of backlight module, including light source and optical texture, it is characterised in that the optical texture will using aforesaid right
The optical texture described in any one in 1-3 is sought, or, the optical texture is using any one in the claims 4-9
Described preparation method manufacture；
The light source is located at the one or both sides of the optical waveguide layer of the optical texture.
A kind of 11. display devices, including backlight module, array base palte and to box substrate, the array base palte and described to box base
Liquid crystal layer is provided between plate, it is characterised in that the backlight module adopts the backlight module described in claim 10, and the back of the body
Light module connects with the array base palte.
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| CN104698682B (en) * | 2015-03-20 | 2017-12-22 | 广东海信电子有限公司 | A kind of module and liquid crystal display device |
| CN105372876B (en) * | 2015-11-20 | 2018-07-06 | 明基材料有限公司 | quantum rod backlight module |
| CN105511145A (en) * | 2016-02-03 | 2016-04-20 | 京东方科技集团股份有限公司 | Display device and fabrication method thereof |
| CN105700233A (en) * | 2016-04-05 | 2016-06-22 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| WO2017175852A1 (en) * | 2016-04-08 | 2017-10-12 | 日本化薬株式会社 | Optical laminate structure, head-up display system in which same is used, and optical reflection film |
| CN105954917A (en) * | 2016-06-29 | 2016-09-21 | 京东方科技集团股份有限公司 | Display apparatus |
| TW201809751A (en) * | 2016-07-13 | 2018-03-16 | Scivax股份有限公司 | Optical element, light emitting element, optical device using said light emitting element, and method for producing said optical element |
| KR102622741B1 (en) * | 2018-09-17 | 2024-01-09 | 삼성전자주식회사 | Back light unit and display apparatus comprising the same |
| CN110764307B (en) * | 2019-11-28 | 2022-02-15 | 京东方科技集团股份有限公司 | Liquid crystal display panel and liquid crystal display device |
| CN111025720A (en) * | 2019-12-16 | 2020-04-17 | 北京小米移动软件有限公司 | Display screen, display device and display method |
| CN113985673B (en) * | 2021-11-18 | 2023-11-14 | 京东方科技集团股份有限公司 | Display device |
| CN114582950A (en) * | 2022-04-24 | 2022-06-03 | 西安明为光学科技有限公司 | OLED display panel and display |
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