CN203465442U - Color filter, liquid crystal panel and display device - Google Patents
Color filter, liquid crystal panel and display device Download PDFInfo
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- CN203465442U CN203465442U CN201320441252.9U CN201320441252U CN203465442U CN 203465442 U CN203465442 U CN 203465442U CN 201320441252 U CN201320441252 U CN 201320441252U CN 203465442 U CN203465442 U CN 203465442U
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Abstract
The utility model provides a color filter, a liquid crystal panel and a display device. The color filter comprises a substrate and a filter layer, wherein the substrate comprises a plurality of pixel corresponding areas, each pixel corresponding area comprises three subareas, the first subarea is provided with a quantum dot material layer which can emit first-color light, the second subarea is provided with a quantum dot material layer which can emit second-color light which is different from the first-color light, and the third subarea is provided with a light-transmission layer; and the filter layer is used for penetrating third-color light and reflecting the first-color light and the second-color light, and the wave length of the third-color light is smaller than the wave lengths of the first-color light and the second-color light. The color filter is made by adopting quantum dots, can improve the lighting utilization rate of the quantum dots, and enhances the brightness and color saturation of the color filter and the display device.
Description
Technical field
The utility model relates to display technique field, refers in particular to a kind of colored filter and liquid crystal panel, display device.
Background technology
The current leading position in occupation of TV and mobile electronic product market of liquid crystal display (LCD, Liquid Crystal Display), but its color is difficult to cover colour gamut completely.The display technique based on Organic Light Emitting Diode (OLED, Organic Light-Emitting Diode) of rising is in recent years also increasingly mature, its simple structure, and thin thickness, fast response time, can realize abundanter color.Simultaneously, birth along with quanta point material, of quanta point material, making the idea of display also arises at the historic moment, because quantum dot (Quantum Dots) emission wavelength scope is extremely narrow, color is very pure, also can realize meticulous adjusting, compares with current display screen, new display screen, when greatly having improved brightness and picture vividness, has also reduced energy consumption.
Quantum dot is that some naked eyes cannot be seen, extremely small semiconductor nanocrystal, is combined particle diameter less than 10 nanometers in crystal by zinc, cadmium, selenium and sulphur atom.Quantum dot has a distinguished characteristic: will be luminous when being subject to electricity or light stimulus, produce light and pure color, and the light color of sending is determined by composition material and size, the shape of quantum dot.Size is more little is more partial to blue light, be more greatly more partial to ruddiness, if calculated accurately, just can send bright-coloured RGB light, so can be used as the RGB three primary colors light source of display.
Existing display, conventionally adopt white light emitting diode (Light Emitting Diode, LED) backlight coordinates to form colored demonstration with common color optical filter, this kind of colored display mode light source utilization factor is low, and the colour gamut of display is narrow, if utilize the above-mentioned characteristic of quantum dot, make colored filter, can reach and greatly improve the brightness of display and the object of color saturation, when yet prior art adopts quantum dot to make the display of colored filter, because quanta point material the produced light that is excited is to all the winds launched, only have sub-fraction to be transferred in intelligent's eye, therefore make the utilization factor of quanta point material not high, cause the waste of material.
Utility model content
The object of technical solutions of the utility model is to provide a kind of colored filter and liquid crystal panel, display device, described colored filter adopts quantum dot to make, the utilization factor of quantum dot light emitting be can improve, and then brightness and the color saturation of colored filter and display device promoted.
The utility model provides a kind of colored filter, comprising:
Substrate, on described substrate, comprise a plurality of pixels corresponding region, in each pixel corresponding region, comprise respectively three sub regions, the quanta point material layer that can send the first color of light is wherein set on the first subregion, the quanta point material layer that can send second color of light different from the first color of light is set on the second subregion, on the 3rd subregion, photic zone is set;
For seeing through the 3rd color of light, reflecting the filter layer of described the first color of light and described the second color of light, wherein said the 3rd color light wavelength is less than described the first color of light and described the second color light wavelength.
Preferably, colored filter described above, between described filter layer and described substrate, be provided with can printing opacity protective seam.
Preferably, colored filter described above, between described the first subregion, described the second subregion and described the 3rd subregion, interval arranges black matrix".
Preferably, colored filter described above, described the first color of light is ruddiness, and described the second color of light is green glow, and described the 3rd color of light is blue light.
Preferably, colored filter described above, the material that forms described filter layer comprises wherein a kind of in germanium, monox, zinc sulphide, zinc selenide, lead telluride, titania and silicon dioxide.
Preferably, colored filter described above, the quanta point material on described the first subregion and described the second subregion is at least one in zinc sulphide, zinc paste, gallium nitride, zinc selenide, cadmium sulfide, gallium selenide, cadmium selenide, zinc telluridse, cadmium telluride, gallium arsenide, indium phosphide and lead telluride.
Preferably, colored filter described above, also comprises common electrode layer, with described filter layer laminating.
The utility model also provides a kind of liquid crystal panel, comprises array base palte and liquid crystal layer, and wherein, described liquid crystal panel also comprises colored filter as above.
The utility model also provides a kind of display device, comprises backlight, wherein, also comprises liquid crystal panel as above.
Preferably, display device described above, it is corresponding with described the 3rd color of light that described backlight sends light.
At least one in the utility model specific embodiment technique scheme has following beneficial effect:
When colored filter receives the 3rd color of light, quanta point material on the first subregion and the second subregion is excited and is luminous, form the first color of light and the second color of light, the 3rd color of light sees through from described the 3rd subregion, thereby forms the light guide of three kinds of colors; And by the setting of filter layer, the first color of light that generates of being excited and the second color of light upwards transmission can enter pleasing to the eye, during transmission downwards, can be reflected by filter layer and change upwards transmission into, therefore can improve the luminous utilization factor of quanta point material, and the brightness and the color saturation that improve colored filter and display device.
Accompanying drawing explanation
Fig. 1 is the structural representation of colored filter described in the utility model embodiment;
Fig. 2 is the structural representation of the display device of colored filter described in employing the utility model embodiment;
Fig. 3 is the be excited schematic diagram of sent light of quanta point material.
Wherein: 1-substrate; 2-protective seam; 3-filter layer; 5-liquid crystal layer; 6-common electrode layer; 7-array base palte; 8-backlight; 11-the first subregion; 12-the second subregion; 13-the 3rd subregion; 14-black matrix".
Embodiment
For making the technical problems to be solved in the utility model, technical scheme and advantage clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
Colored filter described in the utility model the first embodiment, comprising:
Substrate, on described substrate, comprise a plurality of pixels corresponding region, in each pixel corresponding region, comprise respectively three sub regions, the quanta point material layer that can send the first color of light is wherein set on the first subregion, the quanta point material layer that can send second color of light different from the first color of light is set on the second subregion, on the 3rd subregion, photic zone is set;
For seeing through the 3rd color of light, reflecting the filter layer of described the first color of light and described the second color of light, wherein said the 3rd color light wavelength is less than described the first color of light and described the second color light wavelength.
Adopt the colored filter of above-described embodiment structure, when colored filter receives the 3rd color of light, quanta point material on the first subregion and the second subregion is excited and is luminous, form the first color of light and the second color of light, the 3rd color of light sees through from described the 3rd subregion, thereby forms the light guide of three kinds of colors; And by the setting of filter layer, the first color of light and the second color of light generating that be excited enters human eye to first direction (being also the reverse direction arranging towards filter layer) transmission, during to second direction (direction arranging towards filter layer) transmission, can be reflected by filter layer and change into first direction and transmitting, enter human eye, for image, show, therefore can improve the luminous utilization factor of quanta point material, and the brightness and the color saturation that improve colored filter and display device.
In the first embodiment, particularly, described the first color of light can be ruddiness, and described the second color of light can be green glow, and described the 3rd color of light can be blue light; And between described the first subregion, described the second subregion and described the 3rd subregion, interval arranges black matrix".
In addition, the utility model also provides the also enforcement structure of more detailed colored filter.Be illustrated in figure 1 the structural representation of colored filter described in the second embodiment.Consult shown in Fig. 1, colored filter comprises substrate 1, protective seam 2 and filter layer 3 described in the utility model the second embodiment, wherein:
Described substrate 1 is generally a glass substrate; On this substrate 1, be formed with a plurality of pixels corresponding region, in each pixel corresponding region, comprise respectively three sub regions, wherein in the first subregion 11, arrange to be excited and send the quanta point material layer of the first color of light, the quanta point material layer that can send second color of light different from the first color of light is set on the second subregion 12, on the 3rd subregion 13, photic zone is set; This photic zone can be formed by transparency protected filling insulating material.
By the pixel corresponding region of said structure is set on substrate 1, when receiving the 3rd color of light, quanta point material on the first subregion and the second subregion is excited and is luminous, form the first color of light and the second color of light, the 3rd color of light sees through from described the 3rd subregion, thereby forms the light guide of three kinds of colors.
Because short wavelength's luminous energy is high, only have high-energy to excite low-yield, therefore the 3rd color light wavelength should be less than the first color of light and the second color light wavelength.
Particularly, in RGB three primary colors due to common display, blue light wavelength 450～480nm, red light wavelength 620～760nm, green wavelength 500nm～560nm, therefore this first color of light can can be blue light for green glow, the 3rd color of light for ruddiness, the second color of light, thereby forms the RGB tri-look printing opacities of colored filter.But the light guide of formed three kinds of colors is not limited to above three kinds, as long as the 3rd color light wavelength is less than the first color of light and the second color of light, can excite the quanta point material on the first subregion 11 and the second subregion 12 luminous.For example, because blue or green light wavelength is 480～490nm, be less than equally red light wavelength and green wavelength, when therefore the 3rd color of light is green light, can realize the technical solution of the utility model equally.
Quanta point material on described the first subregion 11 and described the second subregion 12 can be zinc sulphide, zinc paste, gallium nitride, zinc selenide, cadmium sulfide, gallium selenide, cadmium selenide, zinc telluridse, cadmium telluride, gallium arsenide, indium phosphide and lead telluride a kind of potpourri of or above-mentioned material wherein.Wherein, according to the difference of quanta point material diameter, can make quanta point material be excited and form the light of different colours, those skilled in the art should be able to understand the first subregion 11 and the second subregion 12 excites respectively while forming ruddiness and green glow, the material of set quanta point material and dimensional structure, be not described in detail at this.
In addition, consult shown in Fig. 1, between the first subregion 11, the second subregion 12 and the 3rd subregion 13, with black matrix" 14 intervals, arrange.
Described filter layer 3, can see through the 3rd color of light, reflect the first color of light and the second color of light, for example, when display utilizes RGB three primary colours Show Color, adopts this filter layer 3, and blue light is seen through, and ruddiness and green glow are reflected.Particularly, the material that forms described filter layer 3 comprises wherein a kind of in germanium, monox, zinc sulphide, zinc selenide, lead telluride, titania and silicon dioxide.Those skilled in the art should understand the structure of the filter layer 3 that can reach above-mentioned effect, at this, are not described in detail.
Further, have between the substrate 1 of said structure and filter layer 3 protective seam 2 is set, this protective seam 2 can be a transparent organic protective film, and particularly, the photic zone of this protective seam 2 and the 3rd subregion 13 is manufactured from the same material.
In addition, the utility model also provides the colored filter of the 3rd embodiment, except comprising the said structure identical with the second embodiment, also comprise common electrode layer, specifically can consult shown in Fig. 2, common electrode layer 6 forms with the preparation technology of colored filter, is fitted and connected with filter layer 3.
The utility model specific embodiment also provides a kind of liquid crystal panel on the other hand, consults shown in Fig. 2, comprises the colored filter of common electrode layer 6, array base palte 7, liquid crystal layer 5 and said structure.Wherein, common electrode layer 6 is fitted and connected with filter layer 3, when the colored filter of said structure is arranged on liquid crystal panel, described liquid crystal layer 5 is arranged between described array base palte 7 and described common electrode layer 6, and described common electrode layer 6 is arranged between described liquid crystal layer 5 and described colored filter.
In addition, described common electrode layer 6 also can be arranged on colored filter, with the preparation technology of colored filter, forms.
The preparation process of the colored filter of the utility model said structure can comprise following several steps:
S310 forms by composition technique the figure that comprises spaced black matrix" 14 on substrate 1; The preparation technology of this concrete black matrix" 14 can adopt mode well known in the art, as adopted, on substrate 1, apply one deck and form black matrix" photoresist used, and the mode of exposing and developing by being carved with the mask plate of figure, form spaced black matrix" 14; In the middle of black matrix" 14, the region at institute interval forms the subregion of pixel corresponding region, and three adjacent subregions are configured to a pixel corresponding region.
S320 forms by composition technique the figure that comprises the first subregion 11 and the second subregion 12 on the basis of above-mentioned steps structure that S310 forms; Concrete mode can be, the method by red quanta point material by transfer printing or printing prints to the first subregion 11; Can green quanta point material method by transfer printing or printing print to the second subregion 12; Those skilled in the art should be able to understand the method for preparing quanta point material on substrate 1, and this preparation method is not technology emphasis of the present utility model, and no further details to be given herein.
In the utility model, be appreciated that the light that " red quanta point material " described above is also at specific wavelength excites the lower quanta point material that can send ruddiness; The light that " green quanta point material " is also at specific wavelength excites the lower quanta point material that can send green glow.
S330; on the substrate 1 of above-mentioned steps S320, apply transparent organic protective material completing; make this transparent organic protective material in the interior filling of the 3rd subregion 13, and be filled with the first subregion 11 of quanta point material and the second subregion 12 above by composition technique, form protective seam 2.
S340, forms filter layer 3 completing on the substrate 1 of above-mentioned steps S330, for seeing through the 3rd color of light, reflects the first color of light and the second color of light.Wherein, the material that forms described filter layer 3 comprises wherein a kind of in germanium, monox, zinc sulphide, zinc selenide, lead telluride, titania and silicon dioxide.The preparation method of this filter layer 3 can in thermal evaporation, bombard film forming by ion beam-assisted for ion gun assistant depositing method, makes rete fine and close, even, improves the stability of film.
Concrete mode can be: first use ion gun to activate bombardment to the substrate 1 of completing steps S330, when the vacuum tightness of vacuum coating equipment reaches 1 * 10
-3during Pa, open ion gun Ion Cleaning is carried out in substrate 1 surface of completing steps S330, to contribute to increase the adhesion of filter layer 3.While selecting the composite material of high-index material lead telluride PbTe and low-index material zinc sulphide ZnS as filter layer 3, start first to deposit certain thickness lead telluride PbTe, according to the film structure of designed filter layer 3, carry out rete deposition again, as to design film structure be HL2HLH (wherein H represents the layout level of high-index material lead telluride PbTe and the layout level that L represents low-index material zinc sulphide ZnS), the central wavelength lambda of filter layer 3 is 450nm, the thickness of every layer is λ/4, the rate of sedimentation of PbTe is 0.3nm/s～0.5nm/s, the rate of sedimentation of ZnS is 0.8～1nm/s, thicknesses of layers and rate of sedimentation can be controlled by film thickness gauge.
S350, forms public electrode (ITO) layer 6 completing on the substrate 1 of above-mentioned steps S340 by composition technique, and the common electrode layer 6 that makes liquid crystal panel forms with the preparation technology of colored filter.Those skilled in the art should be able to understand the preparation method of common electrode layer 6, at this, are not described in detail.
The colored filter that adopts above-mentioned preparation method to form, as shown in Figure 2, with substrate 1 away from liquid crystal layer, common electrode layer 6 is near the mode of liquid crystal layer, be oppositely arranged with array base palte 7, make light that backlight 8 sends after filtration after photosphere 3, excite the quanta point material on the first subregion 11 and the second subregion 12 luminous respectively, because the 3rd subregion 13 is photic zone, therefore the light by the 3rd subregion 13 directly enters human eye by pixel region.Particularly, backlight 8 light that sends is corresponding with the 3rd color of light.As when the 3rd color of light is blue light, backlight 8 can be a blue-light source, concrete can be the turn blue LED light source of coloured light.
Like this, backlight 8 light that sends can see through the first subregion 11, the second subregion 12 and the 3rd subregion 13 that filter layer 3 arrives substrate 1, can excite the quanta point material of the first subregion 11 and the second subregion 12 luminous, as obtain ruddiness and green glow, by the 3rd subregion 13 is rear, directly sees through and obtain blue light, therefore obtain the RGB primaries of display device.In addition, it will be appreciated by those skilled in the art that, during backlight 8 light that sends process liquid crystal layer 5, can control liquid crystal by the thin film transistor (TFT) array switch on array base palte 7 overturns, to realize presenting of the different gray scales of each subpixel area, this part technology is not research emphasis of the present utility model, and no further details to be given herein.
In addition, when backlight 8 emitted lights arrive the first subregion 11 and the second subregion 12, the quanta point material that makes these two regions excites and when luminous, the sent light that is excited is from all directions, as shown in Figure 3, the light of transmission upwards can arrive human eye and be received by human eye, the light of transmission can arrive filter layer 3 downwards, utilize the characteristic of filter layer 3 (best, make the transmittance of blue light can reach more than 99%, to the reflectivity of ruddiness and green glow, can reach more than 90%) and be reflected and upwards enter human eye, thereby improve the utilization factor of quantum dot light emitting, to improve brightness and the color saturation of colored filter and liquid crystal indicator.
The utility model specific embodiment also provides a kind of as above display device of colored filter that has, and as shown in Figure 2, comprises backlight 8 and comprises the as above liquid crystal panel of structure colored filter.Preferably, described backlight 8 light that sends is corresponding with the 3rd color of light, as is a LED blue light source.
Colored filter, liquid crystal panel and display device described in the utility model specific embodiment, make described colored filter adopt quantum dot to make, by the setting of filter layer, can improve the utilization factor of quantum dot light emitting, and then promote brightness and the color saturation of colored filter and display device.
The above is preferred implementation of the present utility model; should be understood that; for those skilled in the art; do not departing under the prerequisite of principle described in the utility model; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (10)
1. a colored filter, is characterized in that, comprising:
Substrate, on described substrate, comprise a plurality of pixels corresponding region, in each pixel corresponding region, comprise respectively three sub regions, the quanta point material layer that can send the first color of light is wherein set on the first subregion, the quanta point material layer that can send second color of light different from the first color of light is set on the second subregion, on the 3rd subregion, photic zone is set;
For seeing through the 3rd color of light, reflecting the filter layer of described the first color of light and described the second color of light, wherein said the 3rd color light wavelength is less than described the first color of light and described the second color light wavelength.
2. colored filter as claimed in claim 1, is characterized in that, between described filter layer and described substrate, be provided with can printing opacity protective seam.
3. colored filter as claimed in claim 1, is characterized in that, between described the first subregion, described the second subregion and described the 3rd subregion, interval arranges black matrix".
4. the colored filter as described in claims 1 to 3 any one, is characterized in that, described the first color of light is ruddiness, and described the second color of light is green glow, and described the 3rd color of light is blue light.
5. colored filter as claimed in claim 1, is characterized in that, the material that forms described filter layer comprises wherein a kind of in germanium, monox, zinc sulphide, zinc selenide, lead telluride, titania and silicon dioxide.
6. colored filter as claimed in claim 1, it is characterized in that, the quanta point material on described the first subregion and described the second subregion is at least one in zinc sulphide, zinc paste, gallium nitride, zinc selenide, cadmium sulfide, gallium selenide, cadmium selenide, zinc telluridse, cadmium telluride, gallium arsenide, indium phosphide and lead telluride.
7. colored filter as claimed in claim 1, is characterized in that, described colored filter also comprises common electrode layer, with described filter layer laminating.
8. a liquid crystal panel, comprises array base palte and liquid crystal layer, it is characterized in that, described liquid crystal panel also comprises the colored filter described in as above claim 1 to 7 any one.
9. a display device, comprises backlight, it is characterized in that, also comprises liquid crystal panel as claimed in claim 8.
10. display device as claimed in claim 9, is characterized in that, it is corresponding with described the 3rd color of light that described backlight sends light.
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