CN105448197A - Display base plate and preparation method thereof as well as display device - Google Patents
Display base plate and preparation method thereof as well as display device Download PDFInfo
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- CN105448197A CN105448197A CN201610004680.3A CN201610004680A CN105448197A CN 105448197 A CN105448197 A CN 105448197A CN 201610004680 A CN201610004680 A CN 201610004680A CN 105448197 A CN105448197 A CN 105448197A
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
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- G—PHYSICS
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
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Abstract
The embodiment of the invention provides a display base plate and a preparation method thereof as well as a display device and relates to the technical field of display, aiming at solving a view angle problem caused by the fact that the display device adopts optical gratings to realize color filtering. The display base plate comprises a colored filtering layer arranged on a substrate base plate; the colored filtering layer comprises a plurality of types of color filtering units which are arrayed in a matrix manner; each of the plurality of types of color filtering units is at least composed of a first optical grating, a second optical grating and a third optical grating; the three optical gratings are used for carrying out light filtering on incident light emitted to the display base plate respectively to obtain light with three base colors; the display base plate further comprises a lens structure; aiming at a region corresponding to any optical grating, the lens structure is used for enabling one part of light emitted from the display base plate to diverge relative to the incident light. The preparation of the display base plate and the display device comprising the display base plate is realized.
Description
Technical field
The present invention relates to display technique field, particularly relate to a kind of display base plate and preparation method thereof, display device.
Background technology
Grating is that the bullion come by equal spacings is formed.As shown in Figure 1, grating height (i.e. the thickness of bullion) is h, spine's width (i.e. the width of bullion) of grating is w, and screen periods p is made up of the spacing between spine width w and adjacent two bullions, accounts for widely to equal w/p than F.
When period p have with the wavelength of visible ray quite or less size time, the reflectivity of grating, transmissivity, polarization characteristic and spectral characteristic etc. all demonstrate feature distinct with conventional diffraction optical element, and grating is now referred to as sub-wave length grating polarizer.When sub-wave length grating polarizer grating height h and account for wide more certain than F, the screen periods p change of sub-wave length grating polarizer can realize the change of the different filtered color of visible light wave range.
Based on the filtering principles of sub-wave length grating polarizer, the colored filter that there has been proposed in recent years based on sub-wave length grating polarizer replaces traditional colored filter be made up of red, green, blue photoresistance resin.Namely the light source sent by backlight by becoming ruddiness, green glow and blue light after the sub-wave length grating polarizer of different p value, to realize the display of pixel different colours in display device.
But, after the above-mentioned colored filter based on sub-wave length grating polarizer is applied to display device, the light sent due to backlight is incide on sub-wave length grating polarizer vertically upward after blooming piece, through sub-wave length grating polarizer leach red, green, blue light is also vertical injection, cause the luminous visual angle of sub-wave length grating polarizer less, the position that beholder is corresponding to display device center is different with the optical wavelength leached by sub-wave length grating polarizer that other positions of departing from center are seen, thus make the display device adopting sub-wave length grating polarizer to realize colorized optical filtering there is the less defect in viewing visual angle, cause display bad.
Summary of the invention
Embodiments of the invention provide a kind of display base plate and preparation method thereof, display device, can improve the viewing angle problem existed after display device adopts grating to realize colorized optical filtering.
For achieving the above object, embodiments of the invention adopt following technical scheme:
On the one hand, embodiments provide a kind of display base plate, described display base plate comprises: be arranged on the chromatic filter layer on underlay substrate; Described chromatic filter layer comprises: the multiple color-filter unit of the arrangement in matrix, described multiple color-filter unit is at least by the first grating, the second grating and the 3rd optical grating constitution, three kinds of gratings are respectively used to filter to the incident light of display base plate described in directive, to obtain the light of three kinds of primary colours; Described display base plate also comprises: lens arrangement; Wherein for the region corresponding to any one grating, described lens arrangement is dispersed relative to described incident light for making the part light penetrated from described display base plate.
Optionally, described lens arrangement comprises: concavees lens structure; Described concavees lens structure is positioned at the side of described chromatic filter layer away from described underlay substrate, and a described concavees lens structure and a grating one_to_one corresponding.
Optionally, described lens arrangement comprises: convex lens structures; Described convex lens structures is positioned at the side of described underlay substrate away from described chromatic filter layer; Wherein, a described convex lens structures corresponds to two to four gratings close to each other, and a described convex lens structures all overlaps with corresponding described two to four gratings.
Preferably, described display base plate comprises: the transparent insulating layer covering described chromatic filter layer; The region that described transparent insulating layer is corresponding to each grating has opening portion; Wherein, described opening portion is semicircle or minor arc shape along the cross sectional shape perpendicular to described underlay substrate direction; Or described opening portion is trapezoidal along the cross sectional shape perpendicular to described underlay substrate direction, and the described trapezoidal top away from described underlay substrate is greater than the following of described trapezoidal close described underlay substrate; Described concavees lens structure filling is in described opening portion.
Preferred further, described trapezoidal lower base angle span is 30 ~ 80 °.
Preferred further, the height span of described opening portion is 0.5 ~ 5.0 μm.
Optionally, at least one in described first grating, described second grating and described 3rd grating is made up of the nano wire equidistantly arranged; Described nano wire comprises: at least one in Nano Silver, nm of gold, nano aluminum, Nanometer Copper.
Optionally, the light of described three kinds of primary colours comprises ruddiness, blue light and green glow; Wherein, leach the cycle span of the grating of ruddiness for (420 ± 10) nm, the live width span of grating is 160 ~ 280nm; And/or leach the cycle span of the grating of green glow for (340 ± 10) nm, the live width span of grating is 120 ~ 240nm; And/or leach the cycle span of the grating of blue light for (260 ± 10) nm, the live width span of grating is 100 ~ 180nm.
Optionally, described display base plate also comprises: be positioned at the thin film transistor array layer of described chromatic filter layer away from described underlay substrate side.
On the other hand, the embodiment of the present invention additionally provides a kind of display device, and described display device comprises the display base plate described in above-mentioned any one.
Again on the one hand, the embodiment of the present invention additionally provides a kind of preparation method of display base plate, and described display base plate comprises: be arranged on the chromatic filter layer on underlay substrate; Described chromatic filter layer comprises: the multiple color-filter unit of the arrangement in matrix, described multiple color-filter unit is at least by the first grating, the second grating and the 3rd optical grating constitution, three kinds of gratings are respectively used to filter to the incident light of display base plate described in directive, to obtain the light of three kinds of primary colours; Described preparation method comprises: the step forming lens arrangement; Wherein for the region corresponding to any one grating, described lens arrangement is dispersed relative to described incident light for making the part light penetrated from described display base plate.
Optionally, the step of described formation lens arrangement comprises: in the side formation concavees lens structure of described chromatic filter layer away from described underlay substrate; Wherein, a described concavees lens structure and a grating one_to_one corresponding.
Preferably, the described step forming concavees lens structures away from the side of described underlay substrate at described chromatic filter layer comprises: form the transparent insulating layer covering described chromatic filter layer; By patterning processes process, correspond to the formation opening portion, region of each grating at described transparent insulating layer; Wherein, described opening portion is semicircle or minor arc shape along the cross sectional shape perpendicular to described underlay substrate direction; Or described opening portion is trapezoidal along the cross sectional shape perpendicular to described underlay substrate direction, and the described trapezoidal top away from described underlay substrate is greater than the following of described trapezoidal close described underlay substrate; Vitreosol is filled in described opening portion; Solidify described vitreosol, form described concavees lens structure.
Optionally, the step of described formation lens arrangement comprises: in the side formation convex lens structures of described underlay substrate away from described chromatic filter layer; Wherein, a described convex lens structures corresponds to two to four gratings close to each other, and a described convex lens structures all overlaps with corresponding described two to four gratings.
Preferably, describedly form the step of convex lens structures at described underlay substrate away from the side of described chromatic filter layer and comprise: adopt spraying or impact system to form vitreosol projective structure at described underlay substrate away from the side of described chromatic filter layer; Wherein, a described vitreosol projective structure corresponds to two to four gratings close to each other, and a described vitreosol projective structure all overlaps with corresponding described two to four gratings; Solidify described vitreosol projective structure, form described convex lens structures.
Based on this, by the above-mentioned display base plate that the embodiment of the present invention provides, owing to arranging lens arrangement above or below chromatic filter layer, for the region corresponding to any one grating, the part light that this lens arrangement can make above-mentioned display base plate penetrate is dispersed relative to incident light, improve the angular field of view that each grating sends light, improve the viewing angle problem existed after display device adopts grating to realize colorized optical filtering.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of grating;
Fig. 2 is three kinds of array arrangement modes of color-filter unit;
The cross-sectional view one of a kind of display base plate that Fig. 3 provides for the embodiment of the present invention;
The cross-sectional view two of a kind of display base plate that Fig. 4 provides for the embodiment of the present invention;
The cross-sectional view three of a kind of display base plate that Fig. 5 provides for the embodiment of the present invention;
Fig. 6 is the plan structure schematic diagram one of Fig. 4 from underlay substrate side;
Fig. 7 is the plan structure schematic diagram two of Fig. 4 from underlay substrate side;
Fig. 8 is the plan structure schematic diagram three of Fig. 4 from underlay substrate side;
The cross-sectional view four of a kind of display base plate that Fig. 9 provides for the embodiment of the present invention;
SiO in a kind of display base plate that Figure 10 provides for the embodiment of the present invention
2preparation technology's schematic flow sheet of colloidal sol.
Reference numeral:
01-display base plate; 10-underlay substrate; 20-chromatic filter layer; 21-first grating; 22-second grating; 23-the 3rd grating; 31-concavees lens structure; 32-convex lens structures; The black matrix of 40-; 50-transparent insulating layer; 51-opening portion; 60-flatness layer; 70-thin film transistor array layer.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
It should be noted that, all terms (comprising technology and scientific terminology) used in the embodiment of the present invention have the identical meanings jointly understood with those skilled in the art.It should also be understood that, those terms such as defined in usual dictionary should be interpreted as having the consistent implication of implication with them in the context of correlation technique, and do not apply idealized or extremely formal meaning explain, unless defined so clearly here.
Each physical dimension involved by the embodiment of the present invention is very small, and for the sake of clarity, in embodiment of the present invention accompanying drawing, the size of each structure is all exaggerated, does not represent physical size and ratio.
As shown in Fig. 3 to Fig. 9, embodiments provide a kind of display base plate 01, this display base plate 01 comprises: be arranged on the chromatic filter layer 20 above underlay substrate 10; This chromatic filter layer 20 comprises: the multiple color-filter unit of the arrangement in matrix, and multiple color-filter unit is at least made up of the first grating 21, second grating 22 and the 3rd grating 23; Three kinds of gratings are respectively used to filter to the light of this display base plate 01 of directive, to obtain the light of three kinds of colors; This display base plate 01 also comprises: lens arrangement; For the region corresponding to any one grating, this lens arrangement is dispersed relative to incident light for making the part light penetrated from above-mentioned display base plate 01.
It should be noted that, first, chromatic filter layer 20 is arranged on underlay substrate 10, the above-mentioned display base plate 01 referred to, on the basis including underlay substrate 10, also includes above-mentioned chromatic filter layer 20.In foregoing description term " on " concept be not restriction to the upper and lower orientation between chromatic filter layer 20 and underlay substrate 10.
The second, chromatic filter layer 20 comprises the multiple color-filter unit of the arrangement in matrix; in order to avoid the optical filtering generation mixed influence display quality of adjacent color-filter unit; shown in figure 3 to Fig. 5; chromatic filter layer 20 also includes the black matrix 40 of each color-filter unit of isolation usually, namely defines different color-filter units by the opening portion of black matrix 40.
Wherein, as shown in Figure 2, the matrix arrangement mode of color-filter unit can continue to use prior art, ruddiness (being labeled as in figure " R ") is leached respectively with three kinds of color-filter units, green glow (being labeled as in figure " G ") and blue light (being labeled as in figure " B ") are example, the stripe matrix arrangement mode as shown in (a) part in Fig. 2 can be adopted, i.e. R, G, B color-filter unit is only alternately arranged along row or column direction, example, shown in figure 2 (a) part, R, G, B color-filter unit is only alternately arranged in a column direction, do not replace in the row direction, so the filter unit of same row can be connected to form strip, or also can adopt the mosaic matrix arrangement mode as shown in (b) part in Fig. 2, namely R, G, B color-filter unit is all alternately arranged with column direction in the row direction, again or, also (" Delta " is delta can to adopt the Delta as shown in (c) part in Fig. 2, represent leg-of-mutton shape) matrix arrangement mode, three R, G, B color-filter units namely close to each other form a leg-of-mutton primitive shape (as shown in dotted outline in FIG.).
Certainly, above-mentioned multiple color-filter unit can also comprise white light color-filter unit (i.e. " white " white, usually represent with W color-filter unit), white light color-filter unit does not filter to incident light, and the light penetrated by white filter unit is exactly the white light that incident light itself sends.Namely above-mentioned multiple color-filter unit is made up of R, G, B and W tetra-kinds of color-filter units, and the concrete kind of color-filter unit can adopt the various ways of prior art, does not repeat them here.
Three, said lens structure can comprise concavees lens structure 31, or convex lens structures 32.Concrete structure and light path principle as described below:
Shown in figure 3 or Fig. 4, when lens arrangement is specially concavees lens structure 31, because concavees lens self have disperse function to incident light, therefore, concavees lens structure 31 is positioned at arranging the side of chromatic filter layer 20 away from underlay substrate, and a concavees lens structure 31 and a grating one_to_one corresponding.
Here, because multiple color-filter unit is matrix arrangement, and be made up of the first above-mentioned grating 21, second grating 22 and the 3rd grating 23, namely in above-mentioned display base plate 01, include multiple first grating 21, multiple second grating 22 and multiple 3rd grating 23.Therefore, an above-mentioned concavees lens structure 31 and a grating one_to_one corresponding, refer to first grating 21 namely to having a concavees lens structure 31, second grating 22 to having a concavees lens structure 31, the 3rd grating 23 to there being a concavees lens structure 31.
Wherein for the region corresponding to any one grating, above-mentioned concavees lens structure 31 for the light path principle that makes the part light penetrated from display base plate 01 and disperse relative to incident light see Fig. 3 or Fig. 4 shown in dotted line, the light that each grating leaches is after the disperse function of concavees lens structure 31, except the light perpendicular to concavees lens structure 31 central area continues vertically injection, all the other light are all dispersed to surrounding, namely relative to the outside deviation of incident light, thus improve the visual angle size after adopting grating to realize colorized optical filtering, improve the viewing angle problem existed after adopting grating to realize colorized optical filtering.
Shown in figure 5, when lens arrangement is specially convex lens structures 32, because convex lens have to incident light the effect of gathering, can there is deviation through after convex lens in namely vertical light, therefore convex lens structures 32 is positioned at the side of underlay substrate 10 away from chromatic filter layer 20 with arranging; Wherein, a convex lens structures 32 corresponds to two to four gratings close to each other, and a convex lens structures 32 all overlaps with corresponding two to four gratings.
Here, because multiple color-filter unit is matrix arrangement, and be made up of the first above-mentioned grating 21, second grating 22 and the 3rd grating 23, namely in above-mentioned display base plate 01, include multiple first grating 21, multiple second grating 22 and multiple 3rd grating 23.Therefore, an above-mentioned convex lens structures 32 corresponds to two to four gratings close to each other, refer in the above-mentioned color-filter unit of the arrangement in matrix, every two to four color-filter units are namely to there being a convex lens structures 32, and each color-filter unit is by optical grating constitution, these two the concrete kinds to four gratings correspond to the concrete mode that color-filter unit is matrix arrangement.
Certainly, above-mentioned convex lens structures 32 also can be positioned at the side of underlay substrate 10 near chromatic filter layer 20 with arranging, the vertical incidence light of the above-mentioned display base plate of directive 01 first after convex lens structures 32 and above-mentioned grating, then penetrates to show through underlay substrate 10.Under considering this kind of structure, a part and corresponding two to four gratings of convex lens structures 32 have overlapping region can be arranged in the gap location of grating, likely can affect the angle of beam projecting, therefore when above-mentioned lens arrangement is specially convex lens structures 32, preferably convex lens structures 32 is arranged on and is positioned at the side of underlay substrate 10 away from chromatic filter layer 20.
Wherein for the region corresponding to any one grating, above-mentioned convex lens structures 32 for the light path principle that makes the part light penetrated from display base plate 01 and disperse relative to incident light see Fig. 5 shown in dotted line, because convex lens have to light the effect of gathering, for first grating 21 in left side in figure, the light of vertical incidence passes the first grating 21 after the part of convex lens structures 32 will carry out deviation to the right, and correspondingly this part light is also penetrate ground in the mode of outside deviation after filtering; And for second grating 22 on right side in figure, the light of vertical incidence passes the first grating 21 after the part of convex lens structures 32 will carry out deviation to the left, correspondingly this part light is also penetrate ground in the mode of outside deviation after filtering, thus make in the region corresponding to any one grating, outwards deviation is there is in the light penetrated from display base plate 01 relative to incident light, namely expand the visual angle size of grating to a certain extent, improve the viewing angle problem existed after display device adopts grating to realize colorized optical filtering.
Herein only with color-filter unit for the stripe matrix arrangement mode in Fig. 2 shown in (a) part, as shown in Figure 6, convex lens structures 32 can correspond to two adjacent gratings, and these two gratings can be any two kinds in above-mentioned first grating 21, second grating 22 and the 3rd grating 23; As shown in Figure 7, convex lens structures 32 can correspond to four gratings close to each other, and these four gratings can be at least two kinds in above-mentioned first grating 21, second grating 22 and the 3rd grating 23.
When the Delta matrix during color-filter unit is with Fig. 2 shown in (c) part arranges, as shown in Figure 8, a convex lens structures 32 can correspond to three gratings close to each other, and these three gratings are respectively above-mentioned first grating 21, second grating 22 and these three kinds of gratings of the 3rd grating 23.
In order to improve the optical filtering angle of each grating equably, a convex lens structures and close to each other two areas to the overlapping region of four gratings are symmetrically.
Here, convex lens structures 32 that will be first above-mentioned due to the light sent from backlight passes underlay substrate 10 again, in order to avoid incident light cannot reflect away through occurring to be totally reflected with the interface of underlay substrate 10 in convex lens structures 32 after convex lens structures 32, therefore the refractive index of underlay substrate 10 is greater than or equals the refractive index of convex lens structures 32.
Four, above-mentioned display base plate 01 can, for the substrate with chromatic filter layer 20 involutory with array base palte, also can be COA (colorfilteronarray) substrate including chromatic filter layer 20 and array base palte.
Due in COA substrate, thin film transistor array layer (being namely formed with the structural sheet of the multiple thin film transistor (TFT)s be arranged in array) shares a underlay substrate 10 in chromatic filter layer 20, the underlay substrate of the color membrane substrates in existing display device in array base palte+color membrane substrates+covering plate structure can be saved, the object of significantly thinning display device thickness can be realized, therefore preferred, as shown in Figure 9, above-mentioned display base plate 01 also comprises the thin film transistor array layer 70 be positioned at above or below chromatic filter layer 20.
Consider that chromatic filter layer 20 is made up of the above-mentioned optical grating construction with different cycles, grating, when filtering to incident light, needs to be arranged on a relatively strict even curface, to avoid having an impact to optical filtering; And thin film transistor array layer is high less than grating for the planarization requirement of substrate, therefore preferred further, thin film transistor array layer is positioned at the side of chromatic filter layer 20 away from underlay substrate.Namely, shown in figure 9, thin film transistor array layer 70 is arranged on above above-mentioned chromatic filter layer 20, specifically can above chromatic filter layer 20 first deposition there is certain thickness flatness layer 60 form above-mentioned thin film transistor array layer 70 again as smooth substrate layer.
Based on this, by the above-mentioned display base plate 01 that the embodiment of the present invention provides, owing to arranging lens arrangement above or below chromatic filter layer 20, for the region corresponding to any one grating, the light that this lens arrangement can make above-mentioned display base plate 01 penetrate is relative to the outside deviation of incident light, improve the angular field of view that each grating sends light, improve the viewing angle problem existed after adopting grating to realize colorized optical filtering.
On the basis of the above, consider that concavees lens need to have certain thickness usually, and the concave surface of concavees lens is relative to chromatic filter layer 20 upwards, the difficulty directly forming concavees lens structure 31 is comparatively large, therefore adopts following mode to realize arranging concavees lens structure 31 above chromatic filter layer 20:
Shown in figure 3 or Fig. 4, above-mentioned display base plate 01 specifically comprises:
Cover the transparent insulating layer 50 of chromatic filter layer 20; The region that transparent insulating layer 50 is corresponding to each grating has opening portion 51; Wherein, opening portion 51 is semicircle or minor arc shape along the cross sectional shape perpendicular to underlay substrate 10 direction; Or opening portion 51 is trapezoidal along the cross sectional shape perpendicular to underlay substrate 10 direction, and the trapezoidal top away from underlay substrate is greater than the following of trapezoidal close underlay substrate; Concavees lens structure 31 is filled in opening portion 10.
It should be noted that, first, opening portion 51 for shown in reference diagram 3, can not penetrate transparent insulating layer 50; Also for shown in reference diagram 4, can run through above-mentioned transparent insulating layer 50, namely the grating being positioned at below is directly exposed in opening portion 51.
The second, the aperture area of opening portion 51 can be arranged by the pixel size corresponding according to color-filter unit; And the height of opening portion 51 affects its dispersion effect to light, height span is 0.5 ~ 5.0 μm.
Consider compared to semicircle or minor arc shape, the cross section of opening portion 51 is more easily formed when being above-mentioned inverted trapezoidal, mass production degree is higher, therefore above-mentioned Fig. 3 and Fig. 4 is only trapezoidal being described for the cross section of opening portion 51, and the cross section of opening portion 51 is that schematic diagram that is semicircle or minor arc shape does not repeat them here.
When the cross section of opening portion 51 is trapezoidal, the angle of inclination on trapezoidal both sides and the dispersion effect of light also have certain light, therefore preferred, above-mentioned twice trapezoidal base angles (namely dual-side and following between angle) span be 30 ~ 80 °; And the value at preferred twice base angles is identical further, with scattered beam equably.
Three, after the light owing to sending from backlight is filtered by concavees lens structure 31, have at least some light first can pass the transparent insulating layer 50 concavees lens structure 31 that directive is above-mentioned again, the light leached in order to avoid grating is occurred to be totally reflected with the interface of concavees lens structure 31 at transparent insulating layer 50 and cannot be penetrated by concavees lens structure 31, and the refractive index of transparent insulating layer 50 is less than or equals the refractive index of concavees lens structure 31.
On the basis of the above, further preferably, at least one in the first grating 21, second grating 22 and the 3rd grating 23 is made up of the nano wire equidistantly arranged; Nano wire comprises: at least one in Nano Silver, nm of gold, nano aluminum, Nanometer Copper, and namely nano wire can be the combination of one or more in above-mentioned Nano Silver, nm of gold, nano aluminum, Nanometer Copper.
Here, for nano-silver thread, nano-silver thread (resistance Rs is 17 Ω/square) can up to more than 90% to the transmitance of visible ray, because grating is made up of lighttight metal material, the problem that the display comparison degree utilizing the nano wire of above-mentioned high permeability can effectively prevent from causing because metal material is reflective declines, improves display quality further.
The nano wire of above-mentioned equidistant arrangement can be formed by etching technics, such as, can first deposit one deck silver metal film, etched by the patterning processes of precision to silver metal film on underlay substrate 10, forms the nano-silver thread one by one of equidistantly arrangement.
Above-mentioned three kinds of gratings are respectively used to filter to the vertical incidence light of display base plate described in directive, and to obtain the light of three kinds of primary colours, namely the cycle of often kind of grating is corresponding with the color that often kind of grating filters respectively.The pixel three primary colours adopted due to current display device are generally red, green, blue three look, therefore preferably, above-mentioned three kinds of gratings are respectively used to correlation and filter to ruddiness, green glow and the blue light in the vertical incidence light of above-mentioned display base plate 01.
Wherein, the cycle span of the grating of ruddiness is leached for (420 ± 10) nm; The live width span leaching the grating of ruddiness is 160 ~ 280nm; Leach the cycle span of the grating of green glow for (340 ± 10) nm; The live width span leaching the grating of green glow is 120 ~ 240nm; Leach the cycle span of the grating of blue light for (260 ± 10) nm; The live width span leaching the grating of blue light is 100 ~ 180nm.
On the basis of the above, further, the embodiment of the present invention additionally provides a kind of display device, and this display device comprises above-mentioned display base plate 01.
On the basis of the above, further, the embodiment of the present invention also provides a kind of preparation method of above-mentioned display base plate, and shown in figure 3 to Fig. 9, this display base plate 01 comprises: be arranged on the chromatic filter layer 20 above underlay substrate 10; This chromatic filter layer 20 comprises: the multiple color-filter unit of the arrangement in matrix, multiple color-filter unit comprises: the first grating 21, second grating 22 and the 3rd grating 23, three kinds of gratings are respectively used to correlation and filter, to obtain the light of three kinds of primary colours to the incident light of above-mentioned display base plate 01; Above-mentioned preparation method comprises:
Form the step of lens arrangement; For the region corresponding to any one grating, this lens arrangement is dispersed relative to incident light for making the part light penetrated from above-mentioned display base plate 01.
As the optional mode of one, the step of the multiple lens arrangement of above-mentioned formation comprises:
In the side formation concavees lens structure 31 of chromatic filter layer 20 away from underlay substrate 10; Wherein, a concavees lens structure 31 and a grating one_to_one corresponding.
Shown in figure 3 or Fig. 4, above-mentioned steps specifically comprises:
Step a: form the transparent insulating layer 50 covering chromatic filter layer 20; Wherein transparent insulating layer 50 can by monox (SiO
2), silicon oxynitride (SiNO
x) and silicon nitride (SiN
x) at least one material form, can be single or multiple lift structure.
Step b: by patterning processes process, corresponds to the formation opening portion, region 51 of each grating at transparent insulating layer 50; Wherein, opening portion 51 is semicircle or minor arc shape along the cross sectional shape perpendicular to underlay substrate 10 direction; Or opening portion 51 is trapezoidal along the cross sectional shape perpendicular to underlay substrate 10 direction, and the trapezoidal top away from underlay substrate is greater than trapezoidal following near underlay substrate, namely above-mentionedly trapezoidally to cheat for inverted trapezoidal.
Here, patterning processes process can be process to be formed the technique with specific pattern to rete (by one or more layers film) arbitrarily, typical patterning processes is application mask plate, by the technique of photoresist exposure, development, etching, removal photoresist.Wherein, mask plate can be normal masks plate or half-tone mask plate or gray mask plate, should adjust flexibly according to concrete patterning processes.
Wherein, consider that dry etching can increase substantially the anisotropy of etching, accurately control the shape of sidewall profile, and have good etching homogeneity, therefore preferably, opening portion 51 adopts dry etch process to be formed.
Step c: fill vitreosol in opening portion 51; Vitreosol preferably adopts functional, the SiO of mature preparation process
2colloidal sol is formed, SiO
2the preparation process of colloidal sol can continue to use prior art technological process as shown in Figure 10, that is: in the mixed solution of a ethyl orthosilicate and ethanol, add ammoniacal liquor, stirs certain hour, makes mixed solution aging, then through backflow forming reactions precursor liquid; In the mixed solution of another part of ethyl orthosilicate and ethanol, add hydrochloric acid solution, stir certain hour, form teos solution; Above-mentioned reaction precursor liquid is mixed with teos solution, refluxes after stirring certain hour, form SiO
2colloidal sol, then to SiO
2colloidal sol carries out follow-up filling, the operation steps of plated film.
Wherein, in order to avoid light produces total reflection phenomenon, the refractive index of transparent insulating layer 50 is less than or equals the refractive index of vitreosol, specifically can by regulating SiO
2parameters in colloidal sol preparation technology obtains the SiO needing refractive index
2colloidal sol.
Steps d: curing transparent colloidal sol, forms concavees lens structure 31; Change solid-state gel into after vitreosol solidification, namely define the above-mentioned structure of concavees lens one by one 31.
As the optional mode of another kind, the step of the multiple lens arrangement of above-mentioned formation comprises:
In the side formation convex lens structures 32 of underlay substrate 10 away from chromatic filter layer 20; Wherein, a convex lens structures 32 corresponds to two to four gratings close to each other, and a convex lens structures 32 all overlaps with corresponding two to four gratings.
Above-mentioned steps specifically comprises:
Step a ': adopt spraying or impact system at the side formation vitreosol projective structure of underlay substrate 10 away from chromatic filter layer 20; Wherein, a vitreosol projective structure corresponds to two to four gratings close to each other, and a vitreosol projective structure all overlaps with corresponding two to four gratings.
Here, when above-mentioned display base plate 01 is applied to high PPi (pixelsperinch, resolution, the i.e. number of pixels that has of per inch) display device time, because pixel is small-sized, namely each color-filter unit small-sized and the surface tension of vitreosol is very large time, be difficult to adopt above-mentioned steps a to fill vitreosol to the method for steps d in opening portion 51.In the case, the its own face tension force of vitreosol can be utilized, adopt spraying or impact system directly at the back side of underlay substrate, namely underlay substrate 10 forms multiple vitreosol projective structure away from the side of chromatic filter layer 20, because the surface tension of vitreosol is comparatively large, nature can form protruding structure and opening portion 51 without the need to arranging above-mentioned transparent insulating layer 50 and transparent insulating layer 50.
Step b ': curing transparent colloidal sol projective structure, forms convex lens structures 32; Change solid-state gel into after vitreosol solidification, namely define above-mentioned convex lens structures one by one 32.
Wherein, in order to avoid light produces total reflection phenomenon, the refractive index of above-mentioned underlay substrate 10 is greater than or equals the refractive index of the vitreosol applied.
It should be noted that, institute of the present invention drawings attached is the simple schematic diagram of above-mentioned display base plate, only for the clear this programme that describes embodies the structure relevant to inventive point, the structure irrelevant with inventive point for other is existing structure, in the accompanying drawings not embodiment or only realizational portion.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (15)
1. a display base plate, described display base plate comprises: be arranged on the chromatic filter layer on underlay substrate; Described chromatic filter layer comprises: the multiple color-filter unit of the arrangement in matrix, described multiple color-filter unit is at least by the first grating, the second grating and the 3rd optical grating constitution, three kinds of gratings are respectively used to filter to the incident light of display base plate described in directive, to obtain the light of three kinds of primary colours; It is characterized in that, described display base plate also comprises:
Lens arrangement;
Wherein for the region corresponding to any one grating, described lens arrangement is dispersed relative to described incident light for making the part light penetrated from described display base plate.
2. display base plate according to claim 1, is characterized in that, described lens arrangement comprises: concavees lens structure; Described concavees lens structure is positioned at the side of described chromatic filter layer away from described underlay substrate, and a described concavees lens structure and a grating one_to_one corresponding.
3. display base plate according to claim 1, is characterized in that, described lens arrangement comprises: convex lens structures; Described convex lens structures is positioned at the side of described underlay substrate away from described chromatic filter layer;
Wherein, a described convex lens structures corresponds to two to four gratings close to each other, and a described convex lens structures all overlaps with corresponding described two to four gratings.
4. display base plate according to claim 2, is characterized in that, described display base plate comprises:
Cover the transparent insulating layer of described chromatic filter layer; The region that described transparent insulating layer is corresponding to each grating has opening portion; Wherein, described opening portion is semicircle or minor arc shape along the cross sectional shape perpendicular to described underlay substrate direction; Or described opening portion is trapezoidal along the cross sectional shape perpendicular to described underlay substrate direction, and the described trapezoidal top away from described underlay substrate is greater than the following of described trapezoidal close described underlay substrate;
Described concavees lens structure filling is in described opening portion.
5. display base plate according to claim 4, is characterized in that, described trapezoidal lower base angle span is 30 ~ 80 °.
6. display base plate according to claim 4, is characterized in that, the height span of described opening portion is 0.5 ~ 5.0 μm.
7. display base plate according to claim 1, is characterized in that,
At least one in described first grating, described second grating and described 3rd grating is made up of the nano wire equidistantly arranged; Described nano wire comprises: at least one in Nano Silver, nm of gold, nano aluminum, Nanometer Copper.
8. display base plate according to claim 1, is characterized in that, the light of described three kinds of primary colours comprises ruddiness, blue light and green glow;
Wherein, leach the cycle span of the grating of ruddiness for (420 ± 10) nm, the live width span of grating is 160 ~ 280nm;
And/or leach the cycle span of the grating of green glow for (340 ± 10) nm, the live width span of grating is 120 ~ 240nm;
And/or leach the cycle span of the grating of blue light for (260 ± 10) nm, the live width span of grating is 100 ~ 180nm.
9. display base plate according to claim 1, is characterized in that, described display base plate also comprises: be positioned at the thin film transistor array layer of described chromatic filter layer away from described underlay substrate side.
10. a display device, is characterized in that, described display device comprises the display base plate as described in any one of claim 1 to 9.
The preparation method of 11. 1 kinds of display base plates, described display base plate comprises: be arranged on the chromatic filter layer on underlay substrate; Described chromatic filter layer comprises: the multiple color-filter unit of the arrangement in matrix, described multiple color-filter unit is at least by the first grating, the second grating and the 3rd optical grating constitution, three kinds of gratings are respectively used to filter to the incident light of display base plate described in directive, to obtain the light of three kinds of primary colours; It is characterized in that, described preparation method comprises:
Form the step of lens arrangement; Wherein for the region corresponding to any one grating, described lens arrangement is dispersed relative to described incident light for making the part light penetrated from described display base plate.
12. preparation methods according to claim 11, is characterized in that, the step of described formation lens arrangement comprises:
In the side formation concavees lens structure of described chromatic filter layer away from described underlay substrate; Wherein, a described concavees lens structure and a grating one_to_one corresponding.
13. preparation methods according to claim 12, is characterized in that, the described step forming concavees lens structures away from the side of described underlay substrate at described chromatic filter layer comprises:
Form the transparent insulating layer covering described chromatic filter layer;
By patterning processes process, correspond to the formation opening portion, region of each grating at described transparent insulating layer; Wherein, described opening portion is semicircle or minor arc shape along the cross sectional shape perpendicular to described underlay substrate direction; Or described opening portion is trapezoidal along the cross sectional shape perpendicular to described underlay substrate direction, and the described trapezoidal top away from described underlay substrate is greater than the following of described trapezoidal close described underlay substrate;
Vitreosol is filled in described opening portion;
Solidify described vitreosol, form described concavees lens structure.
14. preparation methods according to claim 11, is characterized in that, the step of described formation lens arrangement comprises:
In the side formation convex lens structures of described underlay substrate away from described chromatic filter layer; Wherein, a described convex lens structures corresponds to two to four gratings close to each other, and a described convex lens structures all overlaps with corresponding described two to four gratings.
15. preparation methods according to claim 14, is characterized in that, describedly form the step of convex lens structures at described underlay substrate away from the side of described chromatic filter layer and comprise:
Adopt spraying or impact system at the side formation vitreosol projective structure of described underlay substrate away from described chromatic filter layer; Wherein, a described vitreosol projective structure corresponds to two to four gratings close to each other, and a described vitreosol projective structure all overlaps with corresponding described two to four gratings;
Solidify described vitreosol projective structure, form described convex lens structures.
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