CN103278961B - A kind of liquid crystal indicator - Google Patents
A kind of liquid crystal indicator Download PDFInfo
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- CN103278961B CN103278961B CN201310155852.3A CN201310155852A CN103278961B CN 103278961 B CN103278961 B CN 103278961B CN 201310155852 A CN201310155852 A CN 201310155852A CN 103278961 B CN103278961 B CN 103278961B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 55
- 239000000758 substrate Substances 0.000 claims abstract description 50
- 239000012528 membrane Substances 0.000 claims abstract description 42
- 230000003287 optical effect Effects 0.000 claims abstract description 33
- 239000002096 quantum dot Substances 0.000 claims description 47
- 239000000463 material Substances 0.000 claims description 23
- 230000001681 protective effect Effects 0.000 claims description 10
- 230000005142 aphototropism Effects 0.000 claims description 8
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 5
- 239000002210 silicon-based material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 239000010408 film Substances 0.000 description 20
- 239000003086 colorant Substances 0.000 description 12
- 230000005284 excitation Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- NCGICGYLBXGBGN-UHFFFAOYSA-N 3-morpholin-4-yl-1-oxa-3-azonia-2-azanidacyclopent-3-en-5-imine;hydrochloride Chemical compound Cl.[N-]1OC(=N)C=[N+]1N1CCOCC1 NCGICGYLBXGBGN-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
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- 238000001228 spectrum Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000006854 communication Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 210000004276 hyalin Anatomy 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004020 luminiscence type Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000295 emission spectrum Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
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- 230000000149 penetrating effect Effects 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- MEYZYGMYMLNUHJ-UHFFFAOYSA-N tunicamycin Natural products CC(C)CCCCCCCCCC=CC(=O)NC1C(O)C(O)C(CC(O)C2OC(C(O)C2O)N3C=CC(=O)NC3=O)OC1OC4OC(CO)C(O)C(O)C4NC(=O)C MEYZYGMYMLNUHJ-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Liquid Crystal (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Abstract
The invention belongs to display technique field, relate to a kind of liquid crystal indicator.This liquid crystal indicator, comprise color membrane substrates, array base palte and backlight module, described backlight module comprises light source, auxiliary filter layer is provided with in described color membrane substrates, optical exciting layer is provided with in described backlight module, described optical exciting layer produces the Stimulated Light of specific wavelength by the main laser that described light source sends excites, and described auxiliary filter layer can make described Stimulated Light optionally through described color membrane substrates, and main laser is reflected back described backlight module.This liquid crystal indicator both ensure that good display colourity, turn improved the light utilization of backlight module.
Description
Technical field
The invention belongs to display technique field, relate to a kind of liquid crystal indicator.
Background technology
Liquid crystal indicator (LCD:Liquid Crystal Display) has become the main product in current flat-panel monitor because of features such as its volume are little, low in energy consumption, radiationless.Along with the development of display technique, the display device of high permeability, large scale, low-power consumption, low cost becomes following developing direction.
Existing liquid crystal panel comprises color film (Color Filer) substrate, array (Array) substrate and backlight module (Back Light Module), and liquid crystal is arranged between color membrane substrates and array base palte.Liquid crystal itself is not luminous, therefore, adopt in liquid crystal indicator backlight module for liquid crystal panel provide evenly, the light source of high brightness.In general, backlight module can be divided into side entrance back module and down straight aphototropism mode set according to the difference of distribution of light sources position in backlight module.Wherein, the light source in side entrance back module is positioned at backlight module side, and the light source in down straight aphototropism mode set is positioned at the bottom of backlight module.
Color membrane substrates is provided with color rete (also known as colored filter), color rete is that display device can the critical component of colorize.Usually, color rete comprises the color retes of multiple son such as red, green, blue, and the white light that backlight module sends, through color rete, utilizes the chromatic photoresist of color rete to produce red, green, blue three primary colours respectively.While realizing colorize, the light that light source sends is by the obstruction of color rete, and the light that backlight module is sent can not completely through color rete, and namely light some light after color rete is absorbed, and causes light utilization to reduce; Also impact shows colourity simultaneously, and then affects the display effect of liquid crystal indicator.
Summary of the invention
Technical matters to be solved by this invention is for above shortcomings in prior art, provides a kind of liquid crystal indicator, and this liquid crystal indicator both ensure that good display colourity, turn improved the light utilization of backlight module.
The technical scheme that solution the technology of the present invention problem adopts is this liquid crystal indicator, comprise color membrane substrates, array base palte and backlight module, described backlight module comprises light source, auxiliary filter layer is provided with in described color membrane substrates, optical exciting layer is provided with in described backlight module, described optical exciting layer produces the Stimulated Light of specific wavelength by the main laser that described light source sends excites, described auxiliary filter layer can make described Stimulated Light optionally through described color membrane substrates, and main laser is reflected back described backlight module.
Preferably, described color membrane substrates also comprises color rete, described color rete comprises can through the color rete of multiple sons of different wave length light, described auxiliary filter layer is arranged on described color rete and correspond to the region that can be greater than the color rete of son of the wavelength of described main laser through wavelength, and relatively described color rete is closer to described backlight module.
Preferably, described color rete comprises red sub color rete, green sub color rete, blue sub color rete, and described auxiliary filter layer is arranged on color rete with described redness, at least one region that green sub color rete is corresponding;
Or described color rete comprises red sub color rete, yellow sub color rete, green sub color rete and the color rete of blueness, and described auxiliary filter layer is arranged at least one region corresponding with the color rete of redness, green sub color rete and the color rete of yellow.
Preferably, described auxiliary filter layer comprises by the stacked multilayer sublayer of the material of the material and low-refraction with high index of refraction successively interval, and described high-index material forms high refraction sublayer, and described low-index material forms low refraction sublayer.
Preferably, described height refraction sublayer adopts titanic oxide material to be formed, and thickness is 1/8th rejection zone centre wavelengths; Described forming low-refractive-index layer adopts earth silicon material to be formed, and thickness is 1/4th rejection zone centre wavelengths.
Preferably, containing quantum dot in described optical exciting layer, described quantum dot is at least one in red quantum point, green quantum dot or yellow quantum dot.
Preferably, described light source adopts blue light source, and the light that described quantum dot sends by blue light source excites comprises ruddiness, green glow or gold-tinted.
Further preferably; described color membrane substrates also comprises and the protective seam of the stacked setting of described color rete, transparent electrode layer and oriented layer; described auxiliary filter layer is arranged between described color rete and described protective seam; or be arranged between described protective seam and described transparent electrode layer, or be arranged between described transparent electrode layer and described oriented layer.
A kind of preferred version is, described backlight module is side entrance back module, described side entrance back module also comprises the reflector plate of stacked setting, light guide plate and prism film, described light source is arranged on the side of described reflector plate, described light guide plate and described prism film, and described optical exciting layer is arranged between described light guide plate and described prism film.
Another kind of preferred version is, described backlight module is down straight aphototropism mode set, described down straight aphototropism mode set also comprises reflector plate and the diffuser plate of stacked setting, and described light source is arranged between described reflector plate and described diffuser plate, and described optical exciting layer is arranged on the top of described diffuser plate.
The invention has the beneficial effects as follows: by coordinating of filter layer auxiliary in color membrane substrates and optical exciting layer in backlight module, before light arrives color rete, optionally allow the light therethrough color membrane substrates that wavelength is relatively grown, and by a part this may be absorbed by color rete, light reflection that wavelength is relatively short returns backlight module and again utilizes, make this liquid crystal indicator both ensure that good display colourity, turn improve the light utilization of backlight module.
Accompanying drawing explanation
Fig. 1 is the structural representation of liquid crystal indicator in the embodiment of the present invention 1;
Fig. 2 is the principle of work schematic diagram of auxiliary filter layer in Fig. 1;
Fig. 3 is the structural representation of auxiliary filter layer in Fig. 2;
Fig. 4 is the light path schematic diagram of liquid crystal indicator in the embodiment of the present invention 1;
Fig. 5 is the light path schematic diagram of liquid crystal indicator in the embodiment of the present invention 2;
Fig. 6 is the light path schematic diagram of liquid crystal indicator in the embodiment of the present invention 3;
In figure: 1-color membrane substrates; 10-substrate; The color rete of 12-; 13-assists filter layer; 14-protective seam; 15-transparent electrode layer; The upper oriented layer of 16-; The upper polaroid of 17-; The blue sub color rete of 121-; The green sub color rete of 122-; The yellow sub color rete of 123-; The red sub color rete of 124-;
2-array base palte; 20-substrate; 21-TFT; Oriented layer under 22-; Polaroid under 23-;
3-backlight module; 31-light source; 32-reflector plate; 33-light guide plate; 34-optical exciting layer; 35-prism film; 36-diffuser plate;
4-liquid crystal.
Embodiment
For making those skilled in the art understand technical scheme of the present invention better, below in conjunction with the drawings and specific embodiments, liquid crystal indicator of the present invention is described in further detail.
A kind of liquid crystal indicator, comprise color membrane substrates, array base palte and backlight module, described backlight module comprises light source, auxiliary filter layer is provided with in described color membrane substrates, optical exciting layer is provided with in described backlight module, described optical exciting layer produces the Stimulated Light of specific wavelength by the main laser that described light source sends excites, and described auxiliary filter layer can make described Stimulated Light optionally through described color membrane substrates, and main laser is reflected back described backlight module.
Embodiment 1:
A kind of liquid crystal indicator, as shown in Figure 1, comprise color membrane substrates 1, array base palte 2 and backlight module 3, liquid crystal 4 is arranged between color membrane substrates 1 and array base palte 2.Wherein, described backlight module comprises light source 31, auxiliary filter layer 13 is provided with in described color membrane substrates 1, optical exciting layer 34 is provided with in described backlight module 3, the main laser that described optical exciting layer 34 sends by described light source 31 excites and produces the Stimulated Light of specific wavelength, described auxiliary filter layer 13 makes described Stimulated Light optionally through described color membrane substrates 1, and main laser is reflected back described backlight module 3.
In the present invention, described main laser refers to the light that light source initiatively sends, and Stimulated Light refers to the passive light sent by energy excitation.
Fig. 1 shows with the complete structure of the TN type TFT-LCD liquid crystal indicator that is example.As shown in Figure 1, described color membrane substrates 1 comprises substrate 10, black matrix (not specifically illustrating in Fig. 1), color rete 12, auxiliary filter layer 13, protective seam 14, transparent electrode layer 15, upper oriented layer 16 and upper polaroid 17.Described array base palte 2 comprises substrate 20, TFT(thin film transistor (TFT)) 21, lower oriented layer 22 and lower polaroid 23.
Wherein, described auxiliary filter layer 13 is arranged on (structure namely shown in Fig. 1) between described color rete 12 and described protective seam 14; or be arranged between described protective seam 14 and described transparent electrode layer 15, or be arranged between described transparent electrode layer 15 and described upper oriented layer 16.
According to process conditions, in described color membrane substrates 1, protective seam 14 can not be set; Simultaneously, according to the difference of TFT-LCD type, transparent electrode layer 15 also can be arranged in array base palte 2, such as: at ADS type (ADvanced Super Dimension Switch, senior super dimension field switch technology) in TFT-LCD, transparent electrode layer 15 is all arranged in array base palte 2 with pixel electrode (being electrically connected with the drain electrode of TFT, not shown in Fig. 1).In said structure, the position of auxiliary filter layer 13 can be set flexibly, as long as make the relatively color rete 12 of auxiliary filter layer 13 closer to backlight module 3, not limit here.
Wherein, described color rete 12 comprises can through the color rete of multiple sons of different wave length light, described auxiliary filter layer 13 is arranged on described color rete 12 and correspond to the region that can be greater than the color rete of son of the light of the wavelength of described main laser through wavelength, and relatively described color rete 12 is closer to described backlight module 3.In the present embodiment, described color rete 12 comprises red sub color rete 124, green sub color rete 122, blue sub color rete 121, and described auxiliary filter layer 13 is arranged on color rete 124 sub with described redness, at least one region that green sub color rete 122 is corresponding.That is: described auxiliary filter layer 13 is arranged on region corresponding to color rete 124 sub with described redness, or is arranged on the region corresponding with the color rete 122 of green, or is arranged on the region corresponding with the while of the color rete 124 of redness, green sub color rete 122.
Here it should be understood that, consider that the section reducing each layer in color membrane substrates 1 is poor, can be in same layer with described auxiliary filter layer 13, the region that correspond to blue sub color rete 121 arranges the hyaline layer that one deck has complete permeability, such as adopts the hyaline layer etc. that glass is formed; Further, if process conditions allow, the region that correspond to blue sub color rete 121 can not arranged any packing material, to save cost.
Preferably, described auxiliary filter layer 13 comprises by the stacked multilayer sublayer of the material of the material and low-refraction with high index of refraction successively interval, and described high-index material forms high refraction sublayer, and described low-index material forms low refraction sublayer.Wherein, preferably, described height refraction sublayer adopts titanic oxide material to be formed, and thickness is 1/8th rejection zone centre wavelengths; Described forming low-refractive-index layer adopts earth silicon material to be formed, and thickness is 1/4th rejection zone centre wavelengths.
In display technique field, the wavelength coverage of the normal visible ray utilized is: red wavelengths scope 620-770nm(identifies ruddiness with R in the figure of the embodiment of the present invention), yellow wavelengths scope 560-590nm(identifies gold-tinted with Y in the figure of the embodiment of the present invention), green light wavelength coverage 500-530nm(identifies green glow with G in the figure of the embodiment of the present invention), blue light wavelength coverage 430-470nm(identifies blue light with B in the figure of the embodiment of the present invention), known, when described auxiliary filter layer 13 being arranged on the region that correspond to red sub color rete 124 and green sub color rete 122, namely when the reflection realizing the blue light in these correspondence two regions is to improve the utilization factor of blue light, the wavelength values scope of permeable light of filter layer 13 auxiliary described in this can be set to 500-770nm, such as: when preferably this numerical value being set to 580nm, wavelength is greater than the light of 580nm can through auxiliary filter layer 13, and the light that wavelength is less than 580nm will be reflected back toward backlight module 3.
In backlight module 3, containing at least one quantum dot in described optical exciting layer 34, quantum dot wherein sends the visible ray of other colors by the blue-light excited of incidence.Quantum dot (Quantum Dot, QD) be a kind of accurate zero dimension ((quasi-zero-dimensional) Nano semiconductor luminescent material, be made up of a small amount of atom, it is stimulated and can sends visible ray after the certain energy of absorption, and this quantum dot excitation energy comprises optical excitation energy and is electrically excited energy.Namely optical excitation energy adopts light activated mode to make quantum dot light emitting, compare light-emitting phosphor, quantum dot light emitting has that quantum efficiency is high, emission spectrum half-peak width, only by changing the chemical composition of quantum dot or just can accurately controlling the light inspiring different wave length by the size of adjustment quantum dot, thus the visible ray of different colours need be obtained.
In order to ensure that quantum dot can be excited effectively, the wavelength of the main laser that described light source 31 sends is less than described quantum dot and is stimulated the wavelength of the Stimulated Light sent.In the present embodiment, described light source 31 adopts blue light source, and described quantum dot at least comprises red quantum point and green quantum dot, and the Stimulated Light that described quantum dot sends by blue light source excites comprises ruddiness and green glow.
An outstanding advantages of quantum dot is, even commaterial, by means of only the size of adjustment quantum dot, just can the emission wavelength put of precise control amount, and thus obtain the visible ray of different colours.According to the different demand of user, the quantum dot for commaterial can by the visible ray regulating its size to obtain different colours; Or can by the visible ray regulating its chemical composition to obtain different colours for the quantum dot of same size.Therefore, in actual applications, can according to the characteristics of luminescence of quantum dot, such as: luminescent spectrum half-peak breadth, luminescence peak and emission wavelength etc., by regulating the proportioning of the quantum dot of different materials, or, regulate the proportioning of the quantum dot of different size to obtain the light of different colours.General, quantum dot light emitting spectrum half-peak breadth is narrower, and excitation is higher, and the color rendering effect of liquid crystal indicator is better; Simultaneously, quantum dot light emitting crest, wavelength coverage according to the transmitted light of the color rete 122 of color membrane substrates medium green dice, red sub color rete 124 adjusts, the mode of the size adjusting quantum dot now can be taked to come control wave peak position, to make it as far as possible near the wavelength coverage of the transmitted light of the color rete of corresponding son; By adjusting the distributive law of quantum dot, the wave amplitude size that quantum dot sends light can be changed.
Described blue light source can be LED, CCFL or EEFL (External ElectrodeFluorescent Lamp, external electrode fluorescence lamp) etc.At present, the blue LED wavelength of volume production concentrates on 440-455nm scope, and the wavelength of light that blue light source sends is shorter, and the efficiency of excitation quantum point is higher.
In the present embodiment, described backlight module 3 is side entrance back module.As shown in Figure 4, described side entrance back module also comprises the reflector plate 32 of stacked setting, light guide plate 33 and prism film 35, described light source 31 is arranged on the side of described reflector plate 32, described light guide plate 33 and described prism film 35, and described optical exciting layer 34 is arranged between described light guide plate 33 and described prism film 35.Wherein, reflector plate 32 is for penetrating the exiting surface of the light reflection to light guide plate 33 that enter light guide plate 33, and prism film 35 for making the light diffusion from the injection of light guide plate 33 exiting surface, or makes its light luminance improve, or the homogeneity of light improved.
In the present embodiment, the expression formula of the main film system of auxiliary filter layer 13 is:
In formula (1), L representative has low-refraction and thickness is the thickness of the low refraction sublayer of 1/4 rejection zone centre wavelength, H representative there is high index of refraction and thickness be 1/4 rejection zone centre wavelength height refraction sublayer thickness, H/2 then represent there is high index of refraction and thickness be 1/8 rejection zone centre wavelength height refraction sublayer thickness, M is periodicity.Auxiliary filter layer 13 be the series of symmetrical film, centered by intermediate part-layer, both sides symmetry, sublayer add up to 2M+1, as shown in Figure 3.
Assist the thickness of high refraction sublayer, low refraction sublayer in filter layer 13 and film system periodicity can calculate according to formula (2) and formula (3):
In formula (2), Δ λ is the width of rejection zone, λ
0for rejection zone centre wavelength, n
hand n
lbe respectively the refractive index of high-index material, low-index material.
In formula (3): T
rfor the transmitance of rejection zone central wavelength, n
0for the refractive index of upper substrate (namely described auxiliary filter layer 13 is relatively away from liquid crystal 4 side), n
gfor the refractive index of lower substrate (namely described auxiliary filter layer 13 is relatively near liquid crystal 4 side), n
hand n
lbe respectively the refractive index of high and low refractive index material, M is periodicity.
When the refractive index of known high-index material, low-index material, such as: titania (TiO
2) refractive index be: n
h=2.1; Silicon dioxide (SiO
2) refractive index be: n
l=1.46, then have according to formula (2):
Meanwhile, had by formula (2):
Δλ=2Δgλ
0=0.2302λ
0…………………………（4）
Such as: correspond to the auxiliary filter layer 13 that green sub color rete 122 region is arranged, should be set to make wavelength be greater than 500nm light can through and be transmitted to green sub color rete 122, the light that wavelength is less than 500nm is then reflected back toward in backlight module 3.
So have:
Combinatorial formula (4) obtains with formula (5):
λ
0=448.6nm,Δλ=103.2nm
So the thickness of individual layer refraction sublayer is:
Because the height refraction refractive index of sublayer and the refractive index of low refraction sublayer are all known, therefore, only need the transmitance setting central wavelength, main film system basic cycle number M just can be calculated by formula (3), consider the actual impact being coated with error in process and every tunic parametric stability, selected basic cycle number can suitably increase.
Under above-mentioned parameters, as shown in Figure 2, it is inner that the blue visible light (wavelength 430-470nm) that wavelength can be less than 500nm by auxiliary filter layer 13 reflects back into backlight module 3, again reflexed on liquid crystal panel again again re-used by the reflector plate 32 of backlight module 3 inside.And wavelength is greater than the green visible of 500nm, red visible (green visible light wavelength 500-530nm, red visible light wavelength 620-770nm) arrives corresponding color rete 12 through filter layer 13 auxiliary described in this.
As shown in Figure 4, in this liquid crystal indicator, the communication process of light is: light source 31 sends blue light light, blue light light is from the incident light guide plate 33 of incidence surface (i.e. side) of light guide plate 33, exiting surface (i.e. front) by light guide plate 33 after reflector plate 32 reflects propagates into optical exciting layer 34, wherein, be mapped to the blue light light on the quantum dot in optical exciting layer 34, a part of blue light light is absorbed by quantum dot, thus inspires red visible (i.e. ruddiness) or green visible (i.e. green glow); Another part blue light light together propagates into prism film 35 through optical exciting layer 34 with the red visible of being excited to send or green visible and is mixed into white light (white-light spectrum is decomposed into R, G, B tri-crests), propagates in color membrane substrates 1 through array base palte 2, liquid crystal 4.In color membrane substrates 1, correspond to the blue light components in the white light in blue sub color rete 121 region, directly be transmitted to the color rete 121 of blueness in color rete 12, eventually pass through color membrane substrates 1, and correspond to the green component of blue sub color rete 121 and red component is absorbed by the sub color rete 121 of blueness; Correspond to the red light component of red sub color rete 124, correspond to the green component in green sub color rete 122 region and be transmitted on the sub color rete 124 of corresponding redness in color rete 12 and the color rete 122 of green through auxiliary filter layer 13, and eventually pass through color membrane substrates 1, make the normal show image of liquid crystal panel energy, and the green component that correspond to red sub color rete 124 is after assisting filter layer 13 transmission, absorbed by the sub color rete 124 of redness; The red light component that correspond to green sub color rete 122 region, after auxiliary filter layer 13 transmission of correspondence, is absorbed by the sub color rete 122 of green; The blue light components that correspond to red sub color rete 124 and the color rete 122 of green is assisted in filter layer 13 back into backlight module 3, color membrane substrates 1 is again reflected back toward through reflector plate 32, finally be transmitted to the color rete 121 of blueness color membrane substrates 1 from correspond to blue sub color rete 121 region, substantially increase the light utilization of backlight module 3, and make liquid crystal panel reach the effect of better colored display.
Here it should be understood that, in the present embodiment, auxiliary filter layer also can be arranged by subregion, now the auxiliary filter layer of corresponding subregion is set to: the light component that only correspond to permeable respective color in the color rete of described son through, and the light component of other colors is all reflected back toward backlight module, to improve the light utilization of described backlight module further.That is: auxiliary filter layer correspond to the region of green sub color rete, can be set to only can to make green component through, and blue light components is reflected back toward backlight module; Equally, correspond to the region of red sub color rete, can be set to only can to make red light component through, and blue light components and green component are all reflected back toward backlight module.Accordingly; each sublayer that now auxiliary filter layer correspond to subregion should be recalculated according to formula (2) and formula (3) and highly reflect sublayer, the thickness of low refraction sublayer and film system periodicity; and can be prepared on the different layer of color membrane substrates (such as by subregion; the green glow subregion of auxiliary filter layer is arranged on the protection layer, and ruddiness subregion is arranged on transparent electrode layer).
Embodiment 2:
The difference of the present embodiment and embodiment 1 is, in this liquid crystal indicator, the color rete 12 arranged in color membrane substrates 1, auxiliary filter layer 13 are different from the structure of the color rete 12 in embodiment 1, auxiliary filter layer 13; Accordingly, in backlight module 3, optical exciting layer 34 is different from the structure of the optical exciting layer 34 in embodiment 1, as shown in Figure 5.
In the present embodiment, described color rete 12 comprises red sub color rete 124, yellow sub color rete 123, green sub color rete 122 and the color rete 121 of blueness, and described auxiliary filter layer 13 is arranged at least one region corresponding with the color rete 124 of redness, yellow sub color rete 123 and the color rete 122 of green.As required, the light of specific wavelength that described quantum dot sends by blue light source excites comprises at least one in ruddiness, gold-tinted or green glow.Accordingly, in embodiment, be red quantum point, yellow quantum dot, green quantum dot or blue quantum dot at described quantum dot.What correspond to the region of the color rete of each son in described color rete 12 in described auxiliary filter layer 13 is make the light of corresponding color can be through through featured configuration.Assist the thickness of high refraction sublayer, low refraction sublayer in filter layer 13 and film system periodicity can calculate according to formula (2) in embodiment 1 and formula (3), repeat no more here.
In the same way, when the color rete 12 in color membrane substrates is not identical, the quantum dot arranged in optical exciting layer 34 in backlight module 3 is not identical yet, namely, in order to the display making display panels realize setpoint color, should make color rete 12 filter through color and the conjunction matching in colour of visible ray that sends of quantum dot.When the color rete 12 of color membrane substrates in liquid crystal indicator changes, such as: when the color film of liquid crystal indicator is red, green, blue, white four colors, then should include in optical exciting layer 34 to be stimulated and can send the quantum dot of red visible, green visible.According to this principle, if when the color rete of liquid crystal indicator 12 is the color of other multiple colors, then adulterating to be stimulated in optical exciting layer 34 according to actual conditions to send the quantum dot of different colours.
In the present embodiment, other structures of liquid crystal indicator are identical with embodiment 1, and the communication process of light is similar to Example 1, repeats no more here.
Embodiment 3:
The present embodiment is from the different of embodiment 1,2, and in this liquid crystal indicator, backlight module 3 is different from the structure of the backlight module 3 in embodiment 1.
In the present embodiment, as shown in Figure 6, described backlight module 3 is down straight aphototropism mode set, described down straight aphototropism mode set 3 also comprises reflector plate 32 and the diffuser plate 36 of stacked setting, described light source 31 is arranged between described reflector plate 32 and described diffuser plate 36, and described optical exciting layer 34 is arranged on the top of described diffuser plate 36.In order to obtain better light source effect, the backlight module in the present embodiment can also comprise prism film (not shown in Fig. 6), and described prism film can be arranged on the top of described optical exciting layer 34.Prism film for making the light diffusion penetrated from diffuser plate 36, or makes its light luminance improve, or the homogeneity of light is improved.
In the present embodiment, the difference of light transmition process and embodiment 1 is: the light that in the present embodiment, light source 31 sends is from bottom to up through described array base palte 2, liquid crystal 4 and color membrane substrates 1.In auxiliary filter layer 13 pairs of light, reflection and transmission and the embodiment 1,2 identical of different colours component, repeat no more here.
In the present embodiment, other structures and the embodiment 1,2 identical of liquid crystal indicator, repeat no more here.
In liquid crystal indicator of the present invention, by the coordinating of the optical exciting layer of the light of specific wavelength can be sent with backlight module by energy excitation to the auxiliary filter layer that the light of specific wavelength can reflect in color membrane substrates, the light of solid color is first utilized to be excited the light obtaining multiple color by optical exciting layer, then before light arrives color rete, utilize the light therethrough color membrane substrates that auxiliary filter layer optionally allows wavelength relatively grow, and by a part this may be absorbed by color rete, light reflection that wavelength is relatively short returns backlight module.This liquid crystal indicator both ensure that good display colourity, turn improved the light utilization of backlight module.
Be understandable that, the illustrative embodiments that above embodiment is only used to principle of the present invention is described and adopts, but the present invention is not limited thereto.For those skilled in the art, without departing from the spirit and substance in the present invention, can make various modification and improvement, these modification and improvement are also considered as protection scope of the present invention.
Claims (9)
1. a liquid crystal indicator, comprise color membrane substrates, array base palte and backlight module, described backlight module comprises light source, it is characterized in that, be provided with auxiliary filter layer in described color membrane substrates, be provided with optical exciting layer in described backlight module, described optical exciting layer produces the Stimulated Light of specific wavelength by the main laser that described light source sends excites, described auxiliary filter layer can make described Stimulated Light optionally through described color membrane substrates, and main laser is reflected back described backlight module; Described color membrane substrates also comprises color rete, described color rete comprises can through the color rete of multiple sons of different wave length light, described auxiliary filter layer is arranged on described color rete and correspond to the region that can be greater than the color rete of son of the wavelength of described main laser through wavelength, and relatively described color rete is closer to described backlight module.
2. liquid crystal indicator according to claim 1, it is characterized in that, described color rete comprises red sub color rete, green sub color rete, blue sub color rete, and described auxiliary filter layer is arranged on color rete with described redness, at least one region that green sub color rete is corresponding;
Or described color rete comprises red sub color rete, yellow sub color rete, green sub color rete and the color rete of blueness, and described auxiliary filter layer is arranged at least one region corresponding with the color rete of redness, green sub color rete and the color rete of yellow.
3. liquid crystal indicator according to claim 1, it is characterized in that, described auxiliary filter layer comprises by the stacked multilayer sublayer of the material of the material and low-refraction with high index of refraction successively interval, described high-index material forms high refraction sublayer, and described low-index material forms low refraction sublayer.
4. liquid crystal indicator according to claim 3, is characterized in that, described height refraction sublayer adopts titanic oxide material to be formed, and thickness is 1/8th rejection zone centre wavelengths; Described forming low-refractive-index layer adopts earth silicon material to be formed, and thickness is 1/4th rejection zone centre wavelengths.
5. liquid crystal indicator according to claim 1, is characterized in that, containing quantum dot in described optical exciting layer, described quantum dot is at least one in red quantum point, green quantum dot or yellow quantum dot.
6. liquid crystal indicator according to claim 5, is characterized in that, described light source adopts blue light source, and the light that described quantum dot sends by the light that described blue light source sends excites comprises ruddiness, green glow or gold-tinted.
7. the liquid crystal indicator according to any one of claim 1-6; it is characterized in that; described color membrane substrates also comprises and the protective seam of the stacked setting of described color rete, transparent electrode layer and oriented layer; described auxiliary filter layer is arranged between described color rete and described protective seam; or be arranged between described protective seam and described transparent electrode layer, or be arranged between described transparent electrode layer and described oriented layer.
8. liquid crystal indicator according to claim 7, it is characterized in that, described backlight module is side entrance back module, described side entrance back module also comprises the reflector plate of stacked setting, light guide plate and prism film, described light source is arranged on the side of described reflector plate, described light guide plate and described prism film, and described optical exciting layer is arranged between described light guide plate and described prism film.
9. liquid crystal indicator according to claim 7, it is characterized in that, described backlight module is down straight aphototropism mode set, described down straight aphototropism mode set also comprises reflector plate and the diffuser plate of stacked setting, described light source is arranged between described reflector plate and described diffuser plate, and described optical exciting layer is arranged on the top of described diffuser plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310155852.3A CN103278961B (en) | 2013-04-28 | 2013-04-28 | A kind of liquid crystal indicator |
| PCT/CN2013/077950 WO2014176818A1 (en) | 2013-04-28 | 2013-06-26 | Liquid crystal display device |
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| CN201310155852.3A CN103278961B (en) | 2013-04-28 | 2013-04-28 | A kind of liquid crystal indicator |
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