CN101339322A - Optical compound film - Google Patents
Optical compound film Download PDFInfo
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- CN101339322A CN101339322A CNA2007100758480A CN200710075848A CN101339322A CN 101339322 A CN101339322 A CN 101339322A CN A2007100758480 A CNA2007100758480 A CN A2007100758480A CN 200710075848 A CN200710075848 A CN 200710075848A CN 101339322 A CN101339322 A CN 101339322A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 56
- 150000001875 compounds Chemical class 0.000 title claims description 32
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 47
- 230000010287 polarization Effects 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims description 36
- 239000004642 Polyimide Substances 0.000 claims description 12
- 229920001721 polyimide Polymers 0.000 claims description 12
- 239000013078 crystal Substances 0.000 claims description 10
- 239000000758 substrate Substances 0.000 claims description 9
- BAZVSMNPJJMILC-UHFFFAOYSA-N triadimenol Chemical compound C1=NC=NN1C(C(O)C(C)(C)C)OC1=CC=C(Cl)C=C1 BAZVSMNPJJMILC-UHFFFAOYSA-N 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims 2
- 239000002131 composite material Substances 0.000 abstract description 44
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 62
- 239000010408 film Substances 0.000 description 58
- 239000012528 membrane Substances 0.000 description 42
- 238000007689 inspection Methods 0.000 description 13
- 239000004372 Polyvinyl alcohol Substances 0.000 description 11
- 229920002451 polyvinyl alcohol Polymers 0.000 description 11
- 239000012790 adhesive layer Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 208000003464 asthenopia Diseases 0.000 description 7
- 230000004438 eyesight Effects 0.000 description 7
- 210000002858 crystal cell Anatomy 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 230000005684 electric field Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000004988 Nematic liquid crystal Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000000366 juvenile effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 description 1
- 229910001635 magnesium fluoride Inorganic materials 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- WQEVDHBJGNOKKO-UHFFFAOYSA-K vanadic acid Chemical compound O[V](O)(O)=O WQEVDHBJGNOKKO-UHFFFAOYSA-K 0.000 description 1
- 230000009978 visual deterioration Effects 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
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- Liquid Crystal (AREA)
Abstract
The invention provides an optical composite film which is used for liquid crystal display devices and arranged at one side of outlet light of a liquid crystal layer; the optical composite film, in the light outlet direction of the liquid crystal display, sequentially comprises a first polarization layer and a phase compensation layer and can realize the functions of light polarization and phase compensation at the same time, thus changing the outlet light of the liquid crystal display device into the round polarized light or elliptic polarized light, thereby being beneficial to the visible fatigue of the viewers.
Description
[technical field]
The present invention relates to a kind of liquid crystal indicator, relate in particular to a kind of optical compound film that changes the emergent light polarization state.
[background technology]
Along with the continuous development of liquid crystal technology, LCD is widely used, and from the appearance of liquid crystal wrist-watch, liquid crystal is just exceptionally noticeable as the key player of electronic age.Portable phone, game machine, e-dictionary, video camera, digital camera, the videophone of liquid crystal display have appearred having in succession, so notebook computer, monitor, LCD TV etc.Particularly recent, in TV and pc domain, LCD progressively replaces CRT, becomes the main flow in market.
Along with informationalized development, it is more and more stronger that people obtain demand to information, need use PC in office daytime, a night in by seeing that TV or PC obtain information from network, therefore, people will spend a large amount of time in the face of liquid crystal indicator, as PC, LCD TV.
See also the structural representation of the LCD shown in Figure 1A, the 1B, LCD is with two band transparency electrodes 102,104 the glass substrate beaded glass or the plastic bead dottle pin of number micron diameter, the edge is fixed with glue, inject twisted nematic liquid crystal 130, liquid crystal twists 90 degree between upper and lower base plate, two mutually perpendicular polaroids 110,120 of optical axis are adhered in the upper and lower base plate outside.Polaroid 120 optical axises (being parallel to paper) of upside are parallel with the liquid crystal aligning at upside substrate place, and polaroid 110 optical axises (perpendicular to paper) of downside are parallel with the liquid crystal aligning at downside substrate place.Natural light from infrabasal plate to upper substrate incident liquid crystal display, light does not become the polarized light of vertical infrabasal plate place liquid crystal aligning by downside polaroid 110 during added electric field, polarized light is by the liquid crystal layer optically-active, turn over after 90 ° and just in time parallel with the optical axis of upper substrate place polaroid, can see through, as the bright attitude of display, shown in Figure 1A; Liquid crystal molecule 130 is holded up along direction of an electric field during added electric field, aligned twisted originally becomes vertical parallel and arranges, the liquid crystal of polarized light and homeotropic alignment does not act on, plane of polarization no longer rotated when the polarized light of polaroid 110 was by liquid crystal layer under seeing through, when arriving the polaroid 120 of exit end, polarizing axis is vertical with the polarization direction of emergent light, and light is cut off, present dark attitude, shown in Figure 1B.If electric field is not strong especially, liquid crystal molecule is in half upright state, and the optically-active effect also is in half complete state, then has the part light transmission, presents middle gray, the principle of work of LCD that Here it is.From the principle of work of LCD as can be known, the emergent light of existing LCD is a kind of linearly polarized light.
Except this twisted nematic liquid crystal, liquid crystal also has distortion performances such as exhibition song, bending, and different distortion performances is corresponding to the different display modes of liquid crystal.But the displaying principle of the ultimate principle of the display mode that these are different and above-mentioned twisted nematic liquid crystal is similar, i.e. arrangement by liquid crystal molecule changes the polarization direction of light and realizes showing, and the only linearly polarized light of final outgoing.
Different with linearly polarized light, it is that this equally distributed natural light is isotropic to the stimulation of the photosensory cell of human eye uniformly that the vector of natural light on all directions distributes, and human eye is got used to this natural light.Circularly polarized light also is a kind of polarized light, but because the direction vector of circularly polarized light is atwirl, also shows as isotropy, and is the most approaching with natural light.Compare with linearly polarized light, human eye watches circularly polarized light then comparatively comfortable.
Therefore, change the outgoing polarized state of light of existing LCD, have crucial meaning for reducing people's visual fatigue.
[summary of the invention]
Technical matters to be solved by this invention is to provide a kind of optical compound film that changes the emergent light polarized light state.
For solving the problems of the technologies described above, a kind of optical compound film of the present invention is arranged at liquid crystal cell emergent light one side, and the light exit direction that described optical compound film prolongs LCD comprises a polarizing layer and phase compensation layer successively.Described optical compound film is used for the emergent light of liquid crystal indicator is become circularly polarized light or elliptically polarized light outgoing by linearly polarized light, to reduce consumer's visual fatigue.
Further, described polarisation series of strata one polaroid.
Further, described optical compound film further comprises a surface-treated layer in the phase compensation layer outside.
Further again, described optical compound film further comprises a phase compensation layer in the polarizing layer outside.
Compared with prior art, the invention provides a kind of optical compound film, have polarisation and optical phase compensate function optical compound film by be provided with one in liquid crystal cell emergent light one side, thereby the linear polarization emergent light that changes the available liquid crystal display is circularly polarized light emergent light or elliptically polarized light emergent light, helps reducing visual fatigue.
[description of drawings]
The present invention is described in further detail below in conjunction with the drawings and specific embodiments:
Figure 1A, 1B are the structural representations of LCD.
Fig. 2 realizes that LCD emergent light polaroid adds the inclined to one side structural representation of stickup phase compensation.
Fig. 3 is the optical schematic diagram of LCDs among Fig. 2.
Fig. 4 is the delay optical axis of compensate film and the angle synoptic diagram of polaroid optical axis.
Fig. 5 is the structure of composite membrane synoptic diagram that embodiment of the present invention 1 discloses.
Fig. 6 is the structure of composite membrane synoptic diagram that embodiment of the present invention 2 discloses.
The structural representation of the common polaroid of Fig. 7.
Fig. 8 is the structural representation that one of the composite membrane that discloses of Fig. 5 improves composite membrane.
Fig. 9 is the structural representation that one of the composite membrane that discloses of Fig. 6 improves composite membrane.
Figure 10 is that the described composite membrane of Fig. 9 adopts wavelength retardation plate unitized construction synoptic diagram.
Figure 11 is the polarization direction angle graph of a relation that two of the wavelength retardation plate combination shown in Figure 10 postpones optical axis and polarizing layer.
Figure 12 is the composite membrane and the compensation effect contrast synoptic diagram of the composite membrane that adopts λ/4 compensate films to visible light that adopts the phase compensation combination.
Figure 13 is that the mode with crystal production obtains the structure of composite membrane synoptic diagram.
Figure 14 watches the common liquid crystals TV and adds the phase compensation sheet afterwards human eyesight being influenced comparison diagram.
[embodiment]
Consult Fig. 2 to Fig. 4, in order to obtain the liquid crystal indicator that emergent light is linearly polarized light or elliptic polarization light state, the straight simple mode of ratio is to post λ/4 phase compensation films 15 by the outside at the emergent light polaroid 120 of liquid crystal indicator, described phase compensation film 15 is an optical thin film, the phase compensation function can be provided, in visible-range, promptly wavelength X is between 380～760nm usually for the scope of wavelength X.The phase compensation value of described compensate film 15 is a pi/2, and promptly postponing thickness is 140nm, and adheres on the emergent light polaroid 120 by sticker 13.The described compensate film 15 outer diaphragms 17 that also are stained with.Compensate film 15 directly adheres on the emergent light polaroid 120, need not other add-on assembles, can make that the emergent light of liquid crystal indicator is linearly polarized light or elliptically polarized light, realizes that cost is lower.
Postpone optical axises from the polarized light absorption axle of emergent light polaroid 120 outgoing with phase compensation film 15 and become miter angle, because of the phase-delay value of phase compensation film 15 is a pi/2, so can convert linearly polarized light to circularly polarized light from 120 outgoing of emergent light polaroid.This kind conclusion can be according to following principle gained:
Suppose that the linearly polarized light that incides on the wavelength retardation plate (being compensate film 16) has definite vibration plane (as Fig. 7), the X-axis of vibration plane and the electric vector of Y-axis can be expressed as:
Wherein, A is the amplitude of incident light, and ω is an angular frequency,
Be the phasing degree, λ is a light wavelength.And:
a
x＝Acosα
a
y＝Asinα (1-2)
Order:
τ＝ωt (1-3)
Then formula (1-1) can change into:
Order:
Wherein δ is the phasic difference of incident light at X-axis and Y-axis component;
Then have:
Respectively square then addition is then with formula (1-6) equation both sides:
By the synthetic equation of locus of formula (1-7) vertical vibration, when phasic difference δ=± during pi/2, obtain formula (1-8) equation of locus:
If a
x=a
y, then formula (1-8) becomes round equation.Thus, a branch of linearly polarized light incides on the quarter wave plate 14 that thickness is d, and emergent light is that circularly polarized condition is promising:
1) E
xAnd E
yBetween phasic difference
Because
Cause by quarter wave plate 14 itself, so select λ/4 retardation plates for use.
2) E
xAnd E
yAmplitude a
x=a
y, the amplitude of supposing incident ray polarized light is A, the angle of its direction of vibration and X-axis is α, then a
x=Acos α, a
y=Asin α.Make a
x=a
y, must α=45 degree.
In a word, make that a branch of linearly polarized light is the phase compensation film of λ/4 wavelength odd-multiple by postponing thickness, and to postpone thickness be the delay optical axis of the phase compensation film of λ/4 wavelength odd-multiple when becoming miter angle with the polarization direction of emergent light, can obtain a branch of circularly polarized light.
Hence one can see that, posts λ/4 phase compensation films 15 on emergent light polaroid 120, and phase compensation film 15 becomes miter angle with incident light, get final product circularly polarized light.
For better industry application, in the practicality can with the emergent light polaroid in aforementioned two embodiments 120 with its on the λ that posts/4 phase compensation films, 15 integration as a whole, become the composite membrane that to realize polarisation and phase compensation function simultaneously, this composite membrane is a new light transparent member, this light transparent member is arranged on emergent light one side of liquid crystal cell, can make liquid crystal indicator realize circularly polarized light or elliptically polarized light outgoing, will help improving the visual fatigue of human eye.
See also composite membrane 20 structural representations that to realize polarisation and phase compensation function simultaneously shown in Figure 5, this composite membrane is by two adhesive-layers, 23,25 bonding trilaminate materials, the function division of layers of material is as follows, and the polarizing layer 24 that is in bottom is realized the polarisation function, and commonly used is a polaroid; What mediate is the phase compensation layer 26 main phase compensation functions that realize, general λ/4 phase compensation the sheets that adopt, be used for liquid-crystal apparatus, a preferable phase compensation value of phase compensation layer 26 is pi/2s, promptly postponing thickness is 140nm, the material of this phase compensation layer 26 can adopt cyclic olefin polymer (the Cycio Olefins Polymer with birefringent characteristic, COP) film, be called for short COP, adopt biaxial stretch-formed, birefringent characteristic Triafol T (N-TAC) film is arranged, be called for short N-TAC, or adopt the uniaxial tension Triafol T, be coated with the film with birefringent characteristic of polyimide (PI) material formation etc. simultaneously, the preferred miter angle in polarization direction of the delay optical axis of phase compensation layer 26 and polarizing layer 24.What be in the superiors is surface-treated layer 28, mainly plays a safeguard function, and the most frequently used is one deck TAC film, can be by increasing anti-dazzle, anti-reflex treated, to improve the picture quality of screen under extraneous high light environment.In addition, for the ease of commercial production, make things convenient for the stickup of composite membrane 20 and liquid crystal cell, the lateral surface of polarizing layer 24 also is coated with one deck adhesive-layer (figure does not show) usually.
During use, composite membrane 20 is to place liquid crystal cell emergent light one side, linearly polarized light by liquid crystal layer is realized passing through of light and is ended through the polarizing layer 24 of composite membrane 20, carrying out image shows, become circularly polarized light or elliptically polarized light again after the process phase compensation layer 26 through surface-treated layer 28 outgoing, thereby can realize that the liquid crystal display image that human eye is watched is circularly polarized light or elliptically polarized light.
On September 22nd, 2004, Chinese patent publication number " LCD of many display fields vertical orientation type of use circularly polarized light " by name for CN 1530720A discloses has disclosed a kind of Novel LCD structure, sketch it, promptly between two polaroids and liquid crystal layer, increase one deck phase compensation sheet respectively, make that changing circularly polarized light with linearly polarized light into by liquid crystal layer in the LCD passes through liquid crystal layer, with the light leak of solution available liquid crystal display and the problem of color displacement, in order further to adapt to such LCD user demand, the composite membrane 20 of the present invention and the phase compensation film of emergent light one side further can be integrated, form a new composite membrane 30, as shown in Figure 6, the logical adhesive-layer 21 of lateral surface that is about to the polarizing layer 24 of composite membrane 20 is pasted one deck phase compensation layer 22 again, the parameter of the phase compensation layer that the correlation parameter of this phase compensation layer and liquid crystal cell incident light one side are provided with is suitable, detailed parameter mated condition sees also the patent that aforementioned publication number is CN 1530720A, thereby make new composite membrane 30 in use can realize phase compensation simultaneously along the direct of travel of light, polarisation, phase compensation again forms a multi-functional composite membrane.
Aforementioned two composite membranes 20, the 30th, adopt adhesive-layer that each functional material layer is bonded together, thereby make composite membrane 20 of the present invention, 30 compare existing LCD will increase by a phase compensation layer 28 more, influenced transmittance to a certain extent, examine and filter two composite membranes 20,30 middle polarizing layer 24 is polaroids, this polaroid is by two optically isotropic Triafol Ts (Normal TAC) layer 244,246 therebetween one deck polarizing film materials 245, as shown in Figure 7, polarisation material 245 commonly used is polyvinyl alcohol (PVA) (the Polyvinyl Alcohol that utilize iodine staining, PVA) film is called for short PVA.Because PVA is easy to the moisture absorption, yielding, extremely unstable, therefore, cook polaroid with the PVA material, need make sandwich structure usually, the centre is one deck PVA material, each one deck base material TAC of both sides is to shield.
In composite membrane 20 of the present invention; polaroid 24 1 sides have phase compensation layer 26; phase compensation layer 26 can adopt biaxial stretch-formed; birefringent characteristic Triafol T (N-TAC) film is arranged; and N-TAC is except having the phase compensation function; also have substrate and protective effect that Normal TAC material plays in general polaroid; therefore one deck protective material Normal TAC of polarizing layer 24 in the composite membrane 20 of the present invention can be saved; form a kind of new composite membrane 40; consult shown in Figure 8; comprise basalis 244 successively by the light going direction in using; material is Normal TAC; polarizing layer 245; material is PVA; phase compensation layer 26; adhesive-layer 25 and surface-treated layer 28 except N-TAC, can also or adopt the uniaxial tension Triafol T at the material of this phase compensation layer 26 of remarking additionally again with COP; be coated with the film that polyimide (PI) material forms simultaneously with birefringent characteristic.
By same principle, at composite membrane 30 of the present invention, can further improve, the one, can on the basis of composite membrane 20, improve, polarizing layer 24 outermost one deck base material Normal TAC of composite membrane 20 are directly replaced to N-TAC, COP film or adopt the uniaxial tension Triafol T, be coated with the film that polyimide (PI) material forms simultaneously and can realize, compare one deck base material 244 that original composite membrane 30 has saved adhesive-layer 21 and polaroid 24 with birefringent characteristic.Another kind of more simple structure is to improve on the basis of composite membrane 40, the material Normal TAC of the basalis 244 of composite membrane 40 is directly replaced to N-TAC, COP film or employing uniaxial tension Triafol T, the film with birefringent characteristic that is coated with the formation of polyimide (PI) material simultaneously can be realized, thereby form a kind of new composite membrane 60, as shown in Figure 9, comprise phase compensation film 22 successively by the radiation direction in the use, polarisation material PVA layer 245, and phase compensation layer 26, adhesive-layer 25 and surface-treated layer 28, the material of each layer does not repeat them here as previously mentioned.
Composite membrane 20 of the present invention as the aforementioned, 30,40, phase compensation layer 26 is to adopt quarter-wave plate in 60, the preferred pi/2 of its phase compensation value, promptly postpone thickness 140nm, for visible wavelength is better compensated, composite membrane 20,30,40, phase compensation layer 26 can adopt λ/2 compensate films and the film formed wavelength compensation sheet combination of λ/4 compensation in 60, be the example explanation now with composite membrane 60 structures, to increase one deck λ/2 compensate film 26a again by adhesive-layer 27 between phase compensation layer 26 in the composite membrane 60 and the polarisation material PVA layer 245, form compound as shown in figure 10 compensate film 70, other composite membrane 20,30,40 also can increase one deck λ/2 compensate film 26a in the same way, do not remake one by one at this and give unnecessary details.
Wherein, the delay optical axis of λ/2 compensate film 26a if with the polarization direction angle of polarizing layer be θ, the described λ/delay optical axis of 4 compensate films 26 and the polarization direction angle of polarizing layer are 2 θ+45 ° or 2 θ+135 °, wherein the variation range of θ is between 0～90 °.Described λ/2 compensate film 26a and λ/4 compensate films 26 postpone one-tenth-value thickness 1/10 and are preferably 270nm and 140nm respectively.Therefore can convert the LCD emergent light to circularly polarized light and elliptically polarized light by linearly polarized light.
Please consult Figure 11 and Figure 12 once more, from the polarization direction of LCD outgoing polarized light and the delay optical axis included angle of λ/2 compensate film 26a (λ/2 retardation plates) is θ, and the delay optical axis included angle of the delay optical axis of λ/2 compensate film 26a and λ/4 compensate films 26 (λ/4 retardation plates) is 2 θ+45 °.In composite membrane of the present invention,, can carry out better compensation effect to visible wavelength by adopting the wavelength retardation plate combination of λ/2 compensate film 26a and λ/4 compensate films 26.
The applicant has carried out verification experimental verification to two embodiment provided by the invention.
Experiment 1:
Use 2 32 inches LCD TV, one adds 1/4 retardation plate, and one does not deal with.Allow the experimenter on above-mentioned two kinds of TVs, watch continuously respectively in the DVD TV programme 180 minutes, carried out the detection of an eyesight every 30 minutes.The maximum brightness of TV all is set to 325cd/m2 under two kinds of situations.Sample number is for being divided into juvenile group, young group, middle age group, three groups of old group, wherein juvenile group age distribution 8～18 years old, the age distribution 19～35 years old of young group, middle age group age distribution 36～55 years old, the age distribution of old group are more than 55 years old, and each has extracted 10 people, promptly 40 people have carried out contrast test altogether.
Experiment result such as Figure 14 of drawing, curve B is to watch person under inspection's the eyesight mean value of conventional LCD TV with the change curve of viewing time; Curve A is to watch the change curve of the experimenter's who adds 1/4 retardation plate LCD TV eyesight mean value with viewing time.Conventional LCD TV, add under two kinds of situations of 1/4 retardation plate, the eyesight of watching the DVD program all has in various degree decline with the length of viewing time.To recently seeing, to watch after half an hour, two kinds of temporary eyesights of situation all have decline in various degree.Add the conventional relatively LCD TV of 1/4 retardation plate, beholder's visual deterioration amplitude is fewer, and is helpful to protection beholder eyesight.
Experiment 2:
This experiment utilizes frequency of wink to estimate visual fatigue.Use 2 32 inches LCD TV in the experiment, one adds 1/4 retardation plate, and one does not deal with.The person under inspection is divided into two groups at random, uses above-mentioned two kinds of television-viewing programs 150 minutes respectively.Watch in the process of TV the person under inspection, monitor its frequency of wink with electroculogram (EOG) registering instrument.Observe the person under inspection and watch the variation of the frequency of wink in the TV process, can reflect the situation of person under inspection's visual fatigue.This is tested the LCD-TV that finishes 79 person-times altogether and watches experiment and data recording.
Change the number of winks of person under inspection on each time point into frequency of wink (inferior/second), and be listed as follows after asking on average:
Table: the frequency of wink (inferior/second) of person under inspection on each time point
| Grouping | Before watching | 59min | 89min | 125min | After watching |
| Linearly polarized light | 13.59 | 13.18 | 14.44 | 16.77 | 16.55 |
| Circularly polarized light | 13.29 | 11.87 | 12.22 | 14.80 | 13.36 |
Can be observed from top data, before two groups of person under inspection's frequencies of wink are watched relatively decline is arranged all in watching process, progressively become big subsequently again, and the amplitude of variation of linearly polarized light group big than the circularly polarized light group.
At the frequency of wink that two groups of persons under inspection watch the feature film front and back, analyze result such as following table with the pairing t-check of SPSS analysis software:
Table: the frequency of wink before and after two groups of persons under inspection watch (mean+SD time/second)
| Grouping | Before watching TV | After watching TV | t | p |
| Linearly polarized light | 13.6±8.1 | 16.6±9.3 | 3.35 | 0.002 |
| Circularly polarized light | 13.3±6.8 | 13.4±6.2 | 0.11 | 0.913 |
Watch frequency of wink before and after the feature film to match t-check back to two groups of persons under inspection respectively and find, line is organized the person under inspection partially, and to watch frequency of wink ratio behind the feature film to watch before the feature film high, difference significance (p＜0.05); Circle is organized the frequency of wink difference nonsignificance (p＞0.05) that the person under inspection watches the feature film front and back partially.Both compared the LCD-TV TV that traditional output light is linearly polarized light, the TV of circularly polarized light output can alleviate eye fatigue, watches TV to the asthenopic influence of human eye thereby play to alleviate, and reaches the purpose of eyeshield.
Claims (12)
1. an optical compound film is arranged at liquid crystal layer emergent light one side, it is characterized in that, the light exit direction that described optical compound film prolongs LCD comprises a polarizing layer and phase compensation layer successively.
2. a kind of optical compound film as claimed in claim 1 is characterized in that, described polarizing layer is a polaroid.
3. a kind of optical compound film as claimed in claim 1 is characterized in that the phase compensation value of described phase compensation layer is a pi/2.
4. a kind of optical compound film as claimed in claim 1 is characterized in that, described optical compound film further comprises a surface-treated layer in the phase compensation layer outside.
5. as each described a kind of optical compound film of claim 1 to 4, it is characterized in that described optical compound film further comprises a phase compensation layer in the polarizing layer outside.
6. a kind of optical compound film as claimed in claim 1 is characterized in that, the polarizing layer of described optical compound film and phase compensation layer are by the crystal technique formation of growing stage by stage.
7. an optical compound film is arranged at liquid crystal layer emergent light one side, it is characterized in that, the light exit direction that described optical compound film prolongs LCD comprises substrate material layer, PVA material layer successively, reaches phase compensation layer.
8. a kind of optical compound film as claimed in claim 7, it is characterized in that the material of described substrate material layer can be selected TAC, N-TAC, COP for use or adopt the uniaxial tension Triafol T, is coated with the compound substance with birefringent characteristic that polyimide (PI) material forms simultaneously.
9. as claim 7 or 8 described a kind of optical compound films, it is characterized in that the material of described phase compensation layer can be selected N-TAC, COP for use or adopt the uniaxial tension Triafol T, is coated with the compound substance with birefringent characteristic that polyimide (PI) material forms simultaneously.
10. a kind of optical compound film as claimed in claim 7 is characterized in that, described optical compound film further comprises a surface-treated layer in the phase compensation layer outside.
11. a kind of optical compound film as claimed in claim 7 is characterized in that, described phase compensation layer is to adopt λ/2 compensate films and the film formed wavelength compensation sheet combination of λ/4 compensation.
12. a kind of optical compound film as claimed in claim 11, it is characterized in that, described wavelength compensation sheet is combined in along the emergent light direction to be made up of one deck λ/2 compensate films and one deck λ/4 wavelength compensation films, the emergent light polarization direction angle of the delay optical axis of described λ/2 compensate films and liquid crystal indicator is θ, and the emergent light polarization direction angle of the delay optical axis of described λ/4 compensate films and liquid crystal indicator is 2 θ+45 ° or 2 θ+135 °.
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|---|---|---|---|
| CN2007100758480A CN101339322B (en) | 2007-07-06 | 2007-07-06 | Optical compound film |
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|---|---|---|---|
| CN2007100758480A CN101339322B (en) | 2007-07-06 | 2007-07-06 | Optical compound film |
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| CN101339322B CN101339322B (en) | 2012-06-27 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010075682A1 (en) * | 2009-01-05 | 2010-07-08 | 深圳Tcl工业研究院有限公司 | Optical composite film |
| CN102043283A (en) * | 2009-10-20 | 2011-05-04 | 乐金显示有限公司 | Liquid crystal display |
| CN103760715A (en) * | 2013-12-31 | 2014-04-30 | 深圳市华星光电技术有限公司 | Liquid crystal display panel and manufacturing method thereof |
| WO2014187019A1 (en) * | 2013-05-22 | 2014-11-27 | 深圳市华星光电技术有限公司 | Polarizing device, liquid crystal display apparatus, and manufacturing method therefor |
| CN105137637A (en) * | 2015-09-23 | 2015-12-09 | 武汉华星光电技术有限公司 | Liquid crystal display module, liquid crystal display device and terminal |
| CN106371240A (en) * | 2015-07-22 | 2017-02-01 | 乐金显示有限公司 | Display apparatus and polarizer thereof |
| JP2017223991A (en) * | 2012-03-30 | 2017-12-21 | 住友化学株式会社 | Circularly polarizing plate and method for producing the same |
| CN107538885A (en) * | 2017-09-25 | 2018-01-05 | 深圳市运宝莱光电科技有限公司 | A kind of laminating apparatus and its manufacture craft of slim compensation film polaroid |
| TWI614657B (en) * | 2016-12-16 | 2018-02-11 | 奇象光學有限公司 | Optical film and user input system |
| US10394080B2 (en) | 2017-12-28 | 2019-08-27 | Industrial Technology Research Institute | Wideband compensation stack film and optical element using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100462800C (en) * | 2004-07-16 | 2009-02-18 | 住友化学株式会社 | Anti-glare polarizing film laminate and liquid crystal display device using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2010075682A1 (en) * | 2009-01-05 | 2010-07-08 | 深圳Tcl工业研究院有限公司 | Optical composite film |
| CN102043283A (en) * | 2009-10-20 | 2011-05-04 | 乐金显示有限公司 | Liquid crystal display |
| US8743321B2 (en) | 2009-10-20 | 2014-06-03 | Lg Display Co., Ltd. | Liquid crystal display |
| JP2017223991A (en) * | 2012-03-30 | 2017-12-21 | 住友化学株式会社 | Circularly polarizing plate and method for producing the same |
| WO2014187019A1 (en) * | 2013-05-22 | 2014-11-27 | 深圳市华星光电技术有限公司 | Polarizing device, liquid crystal display apparatus, and manufacturing method therefor |
| CN103760715A (en) * | 2013-12-31 | 2014-04-30 | 深圳市华星光电技术有限公司 | Liquid crystal display panel and manufacturing method thereof |
| CN106371240A (en) * | 2015-07-22 | 2017-02-01 | 乐金显示有限公司 | Display apparatus and polarizer thereof |
| CN106371240B (en) * | 2015-07-22 | 2020-09-08 | 乐金显示有限公司 | Display device and its polarizer |
| CN105137637A (en) * | 2015-09-23 | 2015-12-09 | 武汉华星光电技术有限公司 | Liquid crystal display module, liquid crystal display device and terminal |
| TWI614657B (en) * | 2016-12-16 | 2018-02-11 | 奇象光學有限公司 | Optical film and user input system |
| CN107538885A (en) * | 2017-09-25 | 2018-01-05 | 深圳市运宝莱光电科技有限公司 | A kind of laminating apparatus and its manufacture craft of slim compensation film polaroid |
| US10394080B2 (en) | 2017-12-28 | 2019-08-27 | Industrial Technology Research Institute | Wideband compensation stack film and optical element using the same |
| CN114966933A (en) * | 2021-02-26 | 2022-08-30 | 京东方科技集团股份有限公司 | Polarizing assembly, preparation method thereof, display panel and display device |
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