CN103278961A - Liquid crystal display device - Google Patents

Liquid crystal display device Download PDF

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Publication number
CN103278961A
CN103278961A CN2013101558523A CN201310155852A CN103278961A CN 103278961 A CN103278961 A CN 103278961A CN 2013101558523 A CN2013101558523 A CN 2013101558523A CN 201310155852 A CN201310155852 A CN 201310155852A CN 103278961 A CN103278961 A CN 103278961A
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color rete
light
liquid crystal
layer
rete
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CN103278961B (en
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杜志宏
王尚
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BOE Technology Group Co Ltd
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BOE Technology Group Co Ltd
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Priority to CN201310155852.3A priority Critical patent/CN103278961B/en
Priority to PCT/CN2013/077950 priority patent/WO2014176818A1/en
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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 the technical field of displaying, and relates to a liquid crystal display device. The liquid crystal display device comprises a colorful film substrate, an array substrate and a backlight module, wherein the backlight module comprises a light source. An auxiliary light filter layer is arranged in the colorful film substrate. An optical excitation layer is arranged in the backlight module and is excited by main lasers sent out by the light source to generate excited light with specific wave length. The auxiliary light filter layer enables the excited light to selectively penetrate through the colorful film substrate and reflects the main lasers to the backlight module. The liquid crystal display device not only ensures excellent displaying chromaticity but also improves the using rate of light of the backlight module.

Description

A kind of liquid crystal indicator
Technical field
The invention belongs to the display technique field, relate to a kind of liquid crystal indicator.
Background technology
Liquid crystal indicator (LCD:Liquid Crystal Display) has become main product in the present flat-panel monitor because of characteristics such as its volume are little, low in energy consumption, radiationless.Along with the development of display technique, high permeability, large scale, low-power consumption, display device becomes the development in future direction cheaply.
Existing liquid crystal panel comprises color film (Color Filer) substrate, array (Array) substrate and module backlight (Back Light Module), and liquid crystal is arranged between color membrane substrates and the array base palte.Liquid crystal itself is not luminous, therefore, adopts module backlight for liquid crystal panel provides evenly, the light source of high brightness in liquid crystal indicator.In general, the difference according to distribution of light sources position in the module backlight can be divided into side entrance back module and down straight aphototropism mode set with module backlight.Wherein, the light source in the side entrance back module is positioned at module backlight side, and the light source in the down straight aphototropism mode set is positioned at the bottom of module backlight.
Color membrane substrates is provided with color rete (claiming colored filter again), and color rete is the critical component that display device can colorize.Usually, color rete comprises the color retes of a plurality of sons such as red, green, blue, and the white light that module backlight sends utilizes the chromatic photoresist of color rete to produce the red, green, blue three primary colours respectively through color rete.When realizing colorize, the light that light source sends is subjected to the obstruction of color rete, and the light that makes module backlight send can not see through color rete fully, and namely light is absorbed through part light after the color rete, causes light utilization to reduce; Also influence shows colourity simultaneously, and then influences the display effect of liquid crystal indicator.
Summary of the invention
Technical matters to be solved by this invention is at above shortcomings in the prior art, and a kind of liquid crystal indicator is provided, and this liquid crystal indicator had both guaranteed good demonstration colourity, has improved the light utilization of module backlight again.
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 module backlight, described module backlight comprises light source, be provided with auxiliary filter layer in the described color membrane substrates, be provided with optical exciting layer in the described module backlight, the main laser that described optical exciting layer is sent by described light source excites and produces the Stimulated Light of specific wavelength, described auxiliary filter layer can make described Stimulated Light optionally see through described color membrane substrates, and with the described module backlight of main laser reflected back.
Preferably, described color membrane substrates also comprises color rete, described color rete comprises the color rete of a plurality of sons that can see through different wave length light, described auxiliary filter layer is arranged on described color rete correspondence and and can see through wavelength greater than the zone of the sub color rete of the wavelength of described main laser, and the more close described module backlight of described relatively color rete.
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 and the sub color rete of described redness, at least one zone that green sub color rete is corresponding;
Perhaps, described color rete comprises red sub color rete, yellow sub color rete, green sub color rete and blue sub color rete, and described auxiliary filter layer is arranged at least one zone corresponding with the sub color rete of redness, green sub color rete and yellow sub color rete.
Preferably, described auxiliary filter layer comprises that described high-index material forms high refraction sublayer by the material of the material with high index of refraction and low-refraction stacked multilayer sublayer at interval successively, and described low-index material forms low refraction sublayer.
Preferably, described high refraction sublayer adopts titanic oxide material to form, and thickness is 1/8th rejection zone centre wavelengths; Described forming low-refractive-index layer adopts earth silicon material to form, and thickness is 1/4th rejection zone centre wavelengths.
Preferably, contain quantum dot in the described optical exciting layer, described quantum dot is at least a in red quantum dot, green quantum dot or the yellow quantum dot.
Preferably, described light source adopts blue light source, and described quantum dot is excited by blue light source and the light that sends comprises ruddiness, green glow or gold-tinted.
Further preferably; described color membrane substrates also comprises protective seam, transparent electrode layer and the oriented layer with the stacked setting of described color rete; described auxiliary filter layer is arranged between described color rete and the described protective seam; perhaps be arranged between described protective seam and the described transparent electrode layer, perhaps be arranged between described transparent electrode layer and the described oriented layer.
A kind of preferred version is, described module backlight is the side entrance back module, described side entrance back module also comprises reflector plate, light guide plate and the prism film of stacked setting, 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 the described prism film.
Another kind of preferred version is, described module backlight 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 the 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 cooperating of optical exciting layer in auxiliary filter layer in the color membrane substrates and the module backlight, before light arrives color rete, optionally allow the relatively long light of wavelength see through color membrane substrates, this light reflected back module backlight that may be absorbed by color rete, that wavelength is relatively lacked utilizes again and with a part, make this liquid crystal indicator both guarantee good demonstration colourity, improved the light utilization of module backlight again.
Description of drawings
Fig. 1 is the structural representation of liquid crystal indicator in the embodiment of the invention 1;
Fig. 2 is the principle of work synoptic diagram of auxiliary filter layer among Fig. 1;
Fig. 3 is the structural representation of auxiliary filter layer among Fig. 2;
Fig. 4 is the light path synoptic diagram of liquid crystal indicator in the embodiment of the invention 1;
Fig. 5 is the light path synoptic diagram of liquid crystal indicator in the embodiment of the invention 2;
Fig. 6 is the light path synoptic diagram of liquid crystal indicator in the embodiment of the invention 3;
Among the figure: the 1-color membrane substrates; The 10-substrate; The color rete of 12-; 13-assists filter layer; The 14-protective seam; The 15-transparent electrode layer; The last oriented layer of 16-; The last 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-;
The 2-array base palte; The 20-substrate; 21-TFT; Oriented layer under the 22-; Polaroid under the 23-;
3-module backlight; The 31-light source; The 32-reflector plate; The 33-light guide plate; The 34-optical exciting layer; The 35-prism film; The 36-diffuser plate;
The 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 module backlight, described module backlight comprises light source, be provided with auxiliary filter layer in the described color membrane substrates, be provided with optical exciting layer in the described module backlight, the main laser that described optical exciting layer is sent by described light source excites and produces the Stimulated Light of specific wavelength, and described auxiliary filter layer can make described Stimulated Light optionally see through described color membrane substrates, and with the described module backlight of main laser reflected back.
Embodiment 1:
A kind of liquid crystal indicator as shown in Figure 1, comprises color membrane substrates 1, array base palte 2 and module backlight 3, and liquid crystal 4 is arranged between color membrane substrates 1 and the array base palte 2.Wherein, described module backlight comprises light source 31, be provided with auxiliary filter layer 13 in the described color membrane substrates 1, be provided with optical exciting layer 34 in the described module backlight 3, the main laser that described optical exciting layer 34 is sent by described light source 31 excites and produces the Stimulated Light of specific wavelength, described auxiliary filter layer 13 makes described Stimulated Light optionally see through described color membrane substrates 1, and with the described module 3 backlight of main laser reflected back.
In the present invention, described main laser refers to the light that light source initiatively sends, and Stimulated Light refers to and is subjected to energy excitation and the passive light that sends.
It is the complete structure of the liquid crystal indicator of example that Fig. 1 shows with TN type TFT-LCD.As shown in Figure 1, described color membrane substrates 1 comprises substrate 10, black matrix (not specifically illustrating among Fig. 1), color rete 12, auxiliary filter layer 13, protective seam 14, transparent electrode layer 15, goes up oriented layer 16 and last polaroid 17.Described array base palte 2 comprises substrate 20, TFT(thin film transistor (TFT)) 21, down oriented layer 22 and polaroid 23 down.
Wherein, described auxiliary filter layer 13 is arranged on (being structure shown in Figure 1) between described color rete 12 and the described protective seam 14; perhaps be arranged between described protective seam 14 and the described transparent electrode layer 15, perhaps be arranged on described transparent electrode layer 15 and described going up between the oriented layer 16.
According to process conditions, in the described color membrane substrates 1 protective seam 14 can be set; Simultaneously, difference according to the TFT-LCD type, transparent electrode layer 15 also can be arranged in the array base palte 2, for example: at ADS type (ADvanced Super Dimension Switch, a senior super dimension switch technology) among the TFT-LCD, transparent electrode layer 15 all is arranged in the array base palte 2 with pixel electrode (being electrically connected with the drain electrode of TFT, not shown among Fig. 1).In said structure, the position of auxiliary filter layer 13 can be set flexibly, as long as make the auxiliary more close module 3 backlight of the color relatively rete 12 of filter layer 13, do not do restriction here.
Wherein, described color rete 12 comprises the color rete of a plurality of sons that can see through different wave length light, described auxiliary filter layer 13 is arranged on described color rete 12 correspondences and and can see through wavelength greater than the zone of the sub color rete of the light of the wavelength of described main laser, and the more close described module 3 backlight of described relatively color rete 12.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 at least one zone corresponding with the sub color rete 124 of described redness, green sub color rete 122.That is: described auxiliary filter layer 13 is arranged on the zone corresponding with the sub color rete of described redness 124, or is arranged on the zone corresponding with the sub color rete of green 122, or is arranged on the zone simultaneously corresponding with the sub color rete 124 of redness, green sub color rete 122.
Here it should be understood that, consider that the section that reduces each layer in the color membrane substrates 1 is poor, can the hyaline layer that one deck has complete permeability be set with zone that described auxiliary filter layer 13 is in one deck, corresponding blue sub color rete 121, such as the hyaline layer that adopts glass to form etc.; Further, if process conditions allow, the zone that correspondence can blue sub color rete 121 does not arrange any packing material, to save cost.
Preferably, described auxiliary filter layer 13 comprises that described high-index material forms high refraction sublayer by the material of the material with high index of refraction and low-refraction stacked multilayer sublayer at interval successively, and described low-index material forms low refraction sublayer.Wherein, preferred, described high refraction sublayer adopts titanic oxide material to form, and thickness is 1/8th rejection zone centre wavelengths; Described forming low-refractive-index layer adopts earth silicon material to form, and thickness is 1/4th rejection zone centre wavelengths.
The normal wavelength of visible light scope of utilizing is in the display technique field: red light wavelength coverage 620-770nm(identifies ruddiness with R in the figure of the embodiment of the invention), sodium yellow wavelength coverage 560-590nm(identifies gold-tinted with Y in the figure of the embodiment of the invention), green light wavelength coverage 500-530nm(identifies green glow with G in the figure of the embodiment of the invention), blue light wavelength coverage 430-470nm(identifies blue light with B in the figure of the embodiment of the invention), as can be known, when described auxiliary filter layer 13 being arranged on the corresponding red coloration color rete 124 of son and green sub color rete 122 regional, realize that namely the reflection of blue light in these two zones of correspondence is when improving the utilization factor of blue light, wavelength numerical range that can these described auxiliary filter layer 13 permeable light is set to 500-770nm, such as: when preferably this numerical value is set to 580nm, wavelength can see through auxiliary filter layer 13 greater than the light of 580nm, and wavelength will be reflected back toward module 3 backlight less than the light of 580nm.
In module 3 backlight, contain at least a quantum dot in the described optical exciting layer 34, quantum dot wherein is subjected to the blue-light excited of incident and sends the visible light of other colors.Quantum dot (Quantum Dot, QD) be a kind of accurate zero dimension ((quasi-zero-dimensional) Nano semiconductor luminescent material, constituted by a spot of atom, it is stimulated after absorbing certain energy can send visible light, and this quantum dot excitation energy comprises optical excitation energy and electric excitation energy.The optical excitation energy namely adopts light activated mode to make quantum dot light emitting, compare light-emitting phosphor, quantum dot light emitting has quantum efficiency height, emission spectrum half-peak width, only need just can accurately control the light that inspires different wave length by the chemical composition of replacing quantum dot or by the size of adjusting quantum dot, thereby obtain the visible light of different colours.
In order to guarantee that quantum dot can be excited effectively, the light wavelength of being excited that the wavelength of the main laser that described light source 31 sends is stimulated and sends less than described quantum dot.In the present embodiment, described light source 31 adopts blue light sources, and described quantum dot comprises red quantum dot and green quantum dot at least, and described quantum dot is excited by blue light source and the Stimulated Light sent comprises ruddiness and green glow.
An outstanding advantage of quantum dot is, even commaterial only by adjusting the size of quantum dot, just can accurately be controlled the emission wavelength of quantum dot, thereby obtain the visible light of different colours.According to the different demands of user, can obtain the visible light of different colours by the size of regulating it at the quantum dot of commaterial; Perhaps at the visible light that can obtain different colours with a kind of quantum dot of size by the chemical composition of regulating it.Therefore, in actual applications, can be according to the characteristics of luminescence of quantum dot, for example: luminescent spectrum half-peak breadth, luminous crest and emission wavelength etc., the proportioning of the quantum dot by regulating different materials, perhaps, the proportioning of regulating the quantum dot of different size obtains the light of different colours.General, quantum dot light emitting spectrum half-peak breadth is more narrow, and excitation is more high, and the color display effect of liquid crystal indicator is more good; Simultaneously, the 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 is adjusted, can take to adjust the mode of the size of quantum dot this moment and come the control wave peak position, so that it is 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, can change the wave amplitude size that quantum dot sends light.
Described blue light source can be LED, CCFL or EEFL (External Electrode Fluorescent Lamp, external electrode fluorescence lamp) etc.At present, the blue-ray LED wavelength of volume production concentrates on the 440-455nm scope, and the wavelength of light that blue light source sends is more short, and the efficient of excitation quantum point is more high.
In the present embodiment, described module 3 backlight is the side entrance back module.As shown in Figure 4, described side entrance back module also comprises reflector plate 32, light guide plate 33 and the prism film 35 of stacked setting, 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 the described prism film 35.Wherein, reflector plate 32 reflexes to the exiting surface of light guide plate 33 for the light that will enter light guide plate 33 and penetrates, and prism film 35 is used for making the light that penetrates from light guide plate 33 exiting surfaces to spread, and its light luminance is improved, and the homogeneity of light is improved.
In the present embodiment, the expression formula of the main film system of auxiliary filter layer 13 is:
( H 2 L H 2 ) M … … … … … … … … … … ( 1 )
In the formula (1), the L representative has low-refraction and thickness is the thickness of the low refraction sublayer of 1/4 rejection zone centre wavelength, the H representative has high index of refraction and thickness is the thickness of the height refraction sublayer of 1/4 rejection zone centre wavelength, H/2 then represents has the thickness that high index of refraction and thickness are the height refraction sublayer of 1/8 rejection zone centre wavelength, and M is periodicity.Auxiliary filter layer 13 is the series of symmetrical film, centered by intermediate part-layer, the both sides symmetry, the sublayer add up to 2M+1, as shown in Figure 3.
Thickness and the film of high refraction sublayer, low refraction sublayer are that periodicity can calculate according to formula (2) and formula (3) in the auxiliary filter layer 13:
Δλ = 2 Δg λ 0 = 4 λ 0 π sin - 1 ( n H - n L n H + n L ) … … … … … … ( 2 )
In the formula (2), Δ λ is the width of rejection zone, λ 0Be rejection zone centre wavelength, n HAnd n LBe respectively the refractive index of high-index material, low-index material.
T R = 16 n 0 n g ( n H n l ) 2 M { ( n 0 + n g ) 2 ( n 0 n g n H - n H ) 2 } … … … … ( 3 )
In the formula (3): T RBe the transmitance of rejection zone central wavelength, n 0Be the refractive index of last substrate (being that described auxiliary filter layer 13 is relatively away from liquid crystal 4 one sides), n gBe the refractive index of substrate down (being that described auxiliary filter layer 13 is relatively near liquid crystal 4 one sides), n HAnd n LBe respectively the refractive index of high and low refractive index material, M is periodicity.
Under the situation of the refractive index of known high-index material, low-index material, for example: 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):
Δg = 2 π sin - 1 ( n H - n L n H + n L ) = 2 3.14 sin - 1 ( 2.1 - 1.46 2.1 + 1.46 ) = 0.1151
Simultaneously, had by formula (2):
Δλ=2Δgλ 0=0.2302λ 0…………………………（4）
For example: the auxiliary filter layers 13 that corresponding green sub color rete 122 zones arrange, should be set to make wavelength can see through and be transmitted to the sub color rete 122 of green greater than the light of 500nm, wavelength then is reflected back toward in the module 3 backlight less than the light of 500nm.
Have so:
Δλ 2 + λ 0 = 500 … … … … … … … … … … ( 5 )
Combinatorial formula (4) gets with formula (5):
λ 0=448.6nm,Δλ=103.2nm
The thickness of individual layer refraction sublayer is so:
L = H = λ 0 4 = 11.2 nm
Because the refractive index of the refractive index of high refraction sublayer and low refraction sublayer all is known, therefore, only need to set the transmitance of central wavelength, just can calculate main film by formula (3) is the basic cycle to count M, consider actual be coated with error in the process and the influence of every tunic parametric stability, selected basic cycle number can suitably increase.
Arrange under the parameter above-mentioned, as shown in Figure 2, auxiliary filter layer 13 can reflect back into module backlight 3 inside less than the blue visible light (wavelength 430-470nm) of 500nm with wavelength, and the reflector plate 32 by module backlight 3 inside reflexes to again on the liquid crystal panel and re-used again again.And wavelength sees through the color rete 12 that this described auxiliary filter layer 13 arrives correspondence greater than the green visible light of 500nm, red visible light (green visible wavelength 500-530nm, red visible wavelength 620-770nm).
As shown in Figure 4, the communication process of light is in this liquid crystal indicator: light source 31 sends blue light light, blue light light is from incidence surface (being the side) the incident light guide plate 33 of light guide plate 33, exiting surface (namely positive) by light guide plate 33 after reflector plate 32 reflections propagates into optical exciting layer 34, wherein, be mapped to the blue light light on the quantum dot in the optical exciting layer 34, a part of blue light light is absorbed by quantum dot, thereby inspires red visible light (being ruddiness) or green visible light (being green glow); Another part blue light light passes optical exciting layer 34 and together propagates into prism film 35 with the red visible light of being excited to send or green visible light and be mixed into white light (white-light spectrum is decomposed into R, G, three crests of B), propagates in the color membrane substrates 1 through array base palte 2, liquid crystal 4.In color membrane substrates 1, blue light components in corresponding the white light in blue sub color rete 121 zones, directly be transmitted to the blue sub color rete 121 in the color rete 12, finally pass color membrane substrates 1, and green component and the red component of corresponding blue sub color rete 121 are absorbed by the sub color rete 121 of blueness; The green component in the red light component of the color rete 124 of corresponding red coloration, corresponding green sub color rete 122 zones is on auxiliary filter layer 13 is transmitted to the sub color rete 124 of corresponding redness and green sub color rete 122 in the color rete 12, and finally pass color membrane substrates 1, make normally show image of liquid crystal panel, and the green component of the color rete 124 of corresponding red coloration is absorbed by red sub color rete 124 after auxiliary filter layer 13 transmissions; The red light component in corresponding green sub color rete 122 zones is absorbed by green sub color rete 122 after auxiliary filter layer 13 transmissions of correspondence; The blue light components of the color rete 124 of corresponding red coloration and green sub color rete 122 is assisted in the filter layer 13 reflected backs module 3 backlight, be reflected back toward color membrane substrates 1 again through reflector plate 32, finally blue sub color rete 121 zones from correspondence and be transmitted to blue sub color rete 121 color membrane substrates 1, improved the light utilization of module 3 backlight greatly, and made liquid crystal panel reach the better colored effect that shows.
Here it should be understood that, auxiliary filter layer also can the subregion setting in the present embodiment, this moment, the auxiliary filter layer of corresponding subregion was set to: only the light component of permeable respective color sees through in corresponding the color rete of described son, and the light component of other colors all is reflected back toward module backlight, with the light utilization of the described module backlight of further raising.That is: auxiliary filter layer can be set to only to make that green component sees through, and blue light components is reflected back toward module backlight in the zone that correspondence green sub color rete; Equally, the zone at the color rete of corresponding red coloration can be set to only to make that red light component sees through, and blue light components and green component all is reflected back toward module backlight.Accordingly; high refraction sublayer should be recomputated according to formula (2) and formula (3) in each sublayer of assisting the filter layer correspondence subregion at this moment, low thickness and the film that reflects the sublayer is periodicity; but and subregion preparation on the different layer of color membrane substrates (for example; the green glow subregion of auxiliary filter layer is arranged on the protective seam, and the ruddiness subregion is arranged on the transparent electrode layer).
Embodiment 2:
The difference of present embodiment and embodiment 1 is, in this liquid crystal indicator, the color rete 12 among the color rete 12 that arranges in the color membrane substrates 1, auxiliary filter layer 13 and the embodiment 1, assists the structure of filter layer 13 different; Accordingly, the structure of the optical exciting layer 34 in the module 3 backlight among optical exciting layer 34 and the embodiment 1 is different, 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 blue sub color rete 121, and described auxiliary filter layer 13 is arranged at least one zone corresponding with the sub color rete 124 of redness, yellow sub color rete 123 and green sub color rete 122.As required, described quantum dot is excited by blue light source and the light of the specific wavelength that sends comprises at least a in ruddiness, gold-tinted or the green glow.Accordingly, among the embodiment, be red quantum dot, yellow quantum dot, green quantum dot or blue quantum dot at described quantum dot.In the described auxiliary filter layer 13 in corresponding the described color rete 12 characteristic that sees through in the zone of each sub color rete be arranged so that the light of corresponding color can see through.Thickness and the film of high refraction sublayer, low refraction sublayer are that periodicity can calculate according to formula (2) among the embodiment 1 and formula (3) in the auxiliary filter layer 13, repeat no more here.
In the same way, when the color rete 12 in the color membrane substrates is inequality, the quantum dot that arranges in the optical exciting layer 34 in module 3 backlight is also inequality, namely, in order to make display panels realize the demonstration of setpoint color, the matching in colour of visible light that the color that color rete 12 is filtered see through and quantum dot send closed.When the color rete 12 of color membrane substrates in the liquid crystal indicator changes, for example: when the color film of liquid crystal indicator is red, green, blue, white four colors, then should includes in the optical exciting layer 34 to be stimulated and to send the quantum dot of red visible light, green visible light.According to this principle, if when the color rete 12 of liquid crystal indicator is the color of other a plurality of colors, then mixes to be stimulated in optical exciting layer 34 according to actual conditions and can send the quantum dot of different colours.
Other structures of liquid crystal indicator are identical with embodiment 1 in the present embodiment, and the communication process of light is similar to Example 1, repeats no more here.
Embodiment 3:
Present embodiment and embodiment 1,2 different being, in this liquid crystal indicator, the structure of the module backlight 3 among module 3 backlight and the embodiment 1 is different.
In the present embodiment, as shown in Figure 6, described module backlight 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 the 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 module backlight in the present embodiment can also comprise prism film (not shown among Fig. 6), and described prism film can be arranged on the top of described optical exciting layer 34.Prism film is used for making the light diffusion of penetrating from diffuser plate 36, and its light luminance is improved, and the homogeneity of light is improved.
In the present embodiment, the difference of light communication process and embodiment 1 is: the light that light source 31 sends in the present embodiment passes described array base palte 2, liquid crystal 4 and color membrane substrates 1 from bottom to up.The reflection of different colours component and transmission and embodiment 1 in auxiliary 13 pairs of light of filter layer, 2 identical repeat no more here.
Other structures of liquid crystal indicator and embodiment 1 in the present embodiment, 2 identical repeat no more here.
In the liquid crystal indicator of the present invention, by being subjected to energy excitation can send the cooperating of optical exciting layer of the light of specific wavelength in the auxiliary filter layer that can reflect the light of specific wavelength in the color membrane substrates and the module backlight, utilize the light of solid color to excite the light that obtains multiple color by optical exciting layer earlier, then before light arrives color rete, utilize auxiliary filter layer optionally to allow the relatively long light of wavelength see through color membrane substrates, and with a part this may be absorbed by color rete, the relatively short light reflected back module backlight of wavelength.This liquid crystal indicator had both guaranteed good demonstration colourity, had improved the light utilization of module backlight again.
Be understandable that above embodiment only is the illustrative embodiments that adopts for principle of the present invention is described, yet 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 also are considered as protection scope of the present invention.

Claims (10)

1. liquid crystal indicator, comprise color membrane substrates, array base palte and module backlight, described module backlight comprises light source, it is characterized in that, be provided with auxiliary filter layer in the described color membrane substrates, be provided with optical exciting layer in the described module backlight, the main laser that described optical exciting layer is sent by described light source excites and produces the Stimulated Light of specific wavelength, described auxiliary filter layer can make described Stimulated Light optionally see through described color membrane substrates, and with the described module backlight of main laser reflected back.
2. liquid crystal indicator according to claim 1, it is characterized in that, described color membrane substrates also comprises color rete, described color rete comprises the color rete of a plurality of sons that can see through different wave length light, described auxiliary filter layer is arranged on described color rete correspondence and and can see through wavelength greater than the zone of the sub color rete of the wavelength of described main laser, and the more close described module backlight of described relatively color rete.
3. liquid crystal indicator according to claim 2, 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 and the sub color rete of described redness, at least one zone that green sub color rete is corresponding;
Perhaps, described color rete comprises red sub color rete, yellow sub color rete, green sub color rete and blue sub color rete, and described auxiliary filter layer is arranged at least one zone corresponding with the sub color rete of redness, green sub color rete and yellow sub color rete.
4. liquid crystal indicator according to claim 3, it is characterized in that, described auxiliary filter layer comprises by the material of the material with high index of refraction and low-refraction stacked multilayer sublayer at interval successively, described high-index material forms high refraction sublayer, and described low-index material forms low refraction sublayer.
5. liquid crystal indicator according to claim 4 is characterized in that, described high refraction sublayer adopts titanic oxide material to form, and thickness is 1/8th rejection zone centre wavelengths; Described forming low-refractive-index layer adopts earth silicon material to form, and thickness is 1/4th rejection zone centre wavelengths.
6. liquid crystal indicator according to claim 5 is characterized in that, contains quantum dot in the described optical exciting layer, and described quantum dot is at least a in red quantum dot, green quantum dot or the yellow quantum dot.
7. liquid crystal indicator according to claim 6 is characterized in that, described light source adopts blue light source, and the light that described quantum dot is sent by described blue light source excites and the light that sends comprises ruddiness, green glow or gold-tinted.
8. according to each described liquid crystal indicator of claim 1-7; it is characterized in that; described color membrane substrates also comprises protective seam, transparent electrode layer and the oriented layer with the stacked setting of described color rete; described auxiliary filter layer is arranged between described color rete and the described protective seam; perhaps be arranged between described protective seam and the described transparent electrode layer, perhaps be arranged between described transparent electrode layer and the described oriented layer.
9. liquid crystal indicator according to claim 8, it is characterized in that, described module backlight is the side entrance back module, described side entrance back module also comprises reflector plate, light guide plate and the prism film of stacked setting, 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 the described prism film.
10. liquid crystal indicator according to claim 8, it is characterized in that, described module backlight 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 the described diffuser plate, and described optical exciting layer is arranged on the top of described diffuser plate.
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