CN103018954B - A kind of colored filter and preparation method thereof, display device - Google Patents
A kind of colored filter and preparation method thereof, display device Download PDFInfo
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- CN103018954B CN103018954B CN201210564663.7A CN201210564663A CN103018954B CN 103018954 B CN103018954 B CN 103018954B CN 201210564663 A CN201210564663 A CN 201210564663A CN 103018954 B CN103018954 B CN 103018954B
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Abstract
The invention discloses a kind of colored filter and preparation method thereof, display device.Colored filter comprises substrate; Black matrix, covers on substrate; First color resin layer, covers in the first area of above-mentioned black matrix; Second color resin layer, covers in the second area of above-mentioned black matrix; 3rd color resin layer, covers in the 3rd region of above-mentioned black matrix; PS, lays respectively at the assigned address on above-mentioned first color resin layer, the second color resin layer and the 3rd color resin layer, and the height of these three PS is identical and basal diameter is identical.Adopt technical solution of the present invention, planarization layer need not be formed on color resin layer, the colored filter meeting technological requirement can be produced by means of only the thickness controlling different colours color resin layer, need not control Main? PS and Sub? the difference in height of PS, simplify Making programme, effectively save cost of manufacture.
Description
Technical field
The present invention relates to field of liquid crystal display, particularly relate to a kind of colored filter and preparation method thereof, display device.
Background technology
TFT-LCD(ThinFilmTransistorLiquidCrystalDisplay, Thin Film Transistor-LCD) with features such as its volume are little, low in energy consumption, radiationless, be widely used.LTPS(LowTemperaturePoly-silicon; Low temperature polycrystalline silicon) Thin Film Transistor-LCD (i.e. LTPS-TFTLCD) is the one of TFT-LCD, has that resolution is high, reaction velocity is fast, brightness is high, aperture opening ratio advantages of higher.And, because the silicon crystalline arrangement of LTPS-TFTLCD is more in good order compared with a-Si, therefore its electron mobility is very fast, peripheral drive circuit directly can be made on panel, the external contact of assembly can be reduced, increase fiduciary level, safeguard that simpler, shortening is assembled processing time and reduces EMI characteristic, and then reducing applied system design time-histories, and expanding design freedom.
LTPS-TFTLCD is the liquid crystal cell be combined to form by upper and lower two plate bases, when upper and lower two panels liquid crystal cell is involutory, needs to adopt passive PS(PostSpacer between two plate bases; Cylindrical spacer) to keep the box of liquid crystal cell thick.At present, the major design mode adopted PS in LTPS-TFTLCD colored filter is the main PS(MainPS of application) and auxiliary PS(SubPS) jointly play a supporting role.Wherein, there is certain difference in height in MainPS and SubPS, when LTPS-TFTLCD is squeezed, first bears all pressure by MainPS, when pressure reach MainPS can bear the threshold value of pressure time, SubPS will assist MainPS receiving portion partial pressure.
Consult the cross-sectional view of the colored filter that Figure 1 shows that in prior art in LTPS-TFTLCD, wherein, glass substrate 1 is positioned at the bottom; Black matrix 2 is positioned on glass substrate 1; Red color resin bed 3 is arranged in the first area of black matrix 2, and green color resin layer 4 is arranged in the second area on black matrix 2, and blue color resin layer 5 is arranged in the 3rd region on black matrix 2; Planarization layer 6 is positioned on above-mentioned color resin layer; PS, lays respectively at the first area on planarization layer 6, second area and the 3rd region.The first area of planarization layer 6 corresponds to the first area on black matrix 2, and the second area of planarization layer 6 corresponds to the second area on black matrix 2, and the 3rd region of planarization layer 6 corresponds to the 3rd region on black matrix 2.Wherein, any one region in the first area of planarization layer 6, second area and the 3rd region forms MainPS, form SubPS, and the height of MainPS is greater than SubPS in other two regions.In colored filter, planarization layer 6 is positioned at same height for making the bottom surface of MainPS and SubPS, and now only the height of control MainPS and SubPS can produce the PS meeting technological requirement.
In prior art, usually adopt the method for application half-tone to the PS process in above-mentioned colored filter, be specially:
Consult the another kind of disposal route that Figure 2 shows that to PS in colored filter in prior art, the method is by applying half-tone in Mask technique, make in the exposure process making PS, light intensity through mask plate above MainPS is 100%, and the light intensity through mask plate above SubPS is 50%.Adopt above-mentioned technique can obtain meeting the PS of technological requirement, but half-tone costly, and above-mentioned manufacture craft is difficult to realize, thus it is higher to cause cost, the problem not easily realized.
In sum, in prior art, in the process making colored filter, there is cost of manufacture high, the problem not easily realized.
Summary of the invention
The embodiment of the present invention provides a kind of colored filter and preparation method thereof, display device, in order to solve in prior art make colored filter process in, there is cost of manufacture high, the problem not easily realized.
The concrete technical scheme that the embodiment of the present invention provides is as follows:
A kind of colored filter, comprising:
Substrate;
First color resin layer, covers in the first area of described substrate; Second color resin layer, covers in the second area of described substrate; 3rd color resin layer, covers in the 3rd region of described substrate; Wherein, the thickness of the color resin layer on described first area, second area or the 3rd region, is greater than the thickness of the color resin layer in other two regions;
Cylindrical spacer PS, lays respectively at the assigned address on described first color resin layer, the second color resin layer and the 3rd color resin layer, and the height of these three PS is identical and basal diameter is identical.
A kind of colored filter method for making, comprising:
Substrate is formed black matrix;
The first color resin layer is formed in the first area of described black matrix, the second color resin layer is formed at the second area of described black matrix, the 3rd color resin layer is formed in the 3rd region of described black matrix, wherein, make the thickness of the color resin layer on described first area, second area or the 3rd region, be greater than the thickness of the color resin layer in other two regions;
Assigned address on described first color resin layer, the second color resin layer and the 3rd color resin layer is the identical and cylindrical spacer PS that basal diameter is identical of height of formation respectively.
The present invention also provides a kind of display device, comprises above-mentioned colored filter.
In the embodiment of the present invention, colored filter comprises substrate; Black matrix, covers on aforesaid substrate; First color resin layer, covers in the first area of above-mentioned black matrix; Second color resin layer, covers in the second area of above-mentioned black matrix; 3rd color resin layer, covers in the 3rd region of above-mentioned black matrix; Wherein, the thickness of the color resin layer on above-mentioned first area, second area or the 3rd region, is greater than the thickness of the color resin layer in other two regions; PS, lays respectively at the assigned address on above-mentioned first color resin layer, the second color resin layer and the 3rd color resin layer, and the height of these three PS is identical and basal diameter is identical.Adopt technical solution of the present invention, planarization layer need not be formed on color resin layer, the colored filter meeting technological requirement can be produced by means of only the thickness controlling different colours color resin layer, need not the difference in height of control MainPS and SubPS, simplify Making programme, effectively save cost of manufacture.
Accompanying drawing explanation
Fig. 1 is colored filter cross-sectional view in prior art;
Fig. 2 is colored filter method for making schematic diagram in prior art;
Fig. 3 is colored filter cross-sectional view in the embodiment of the present invention;
Fig. 4 is the schematic top plan view of display unit in colored filter in the embodiment of the present invention;
Fig. 5 is colored filter Making programme figure in the embodiment of the present invention.
Embodiment
In order to solve in prior art make colored filter process in, there is cost of manufacture high, the problem not easily realized.In the embodiment of the present invention, colored filter comprises substrate; Black matrix, covers on aforesaid substrate; First color resin layer, covers in the first area of above-mentioned black matrix; Second color resin layer, covers in the second area of above-mentioned black matrix; 3rd color resin layer, covers in the 3rd region of above-mentioned black matrix; Wherein, the thickness of the color resin layer on above-mentioned first area, second area or the 3rd region, is greater than the thickness of the color resin layer in other two regions; PS, lays respectively at the assigned address on above-mentioned first color resin layer, the second color resin layer and the 3rd color resin layer, and the height of these three PS is identical and basal diameter is identical.Adopt technical solution of the present invention, planarization layer need not be formed on color resin layer, the colored filter meeting technological requirement can be produced by means of only the thickness controlling different colours color resin layer, need not the difference in height of control MainPS and SubPS, simplify Making programme, effectively save cost of manufacture.
Below in conjunction with accompanying drawing, the preferred embodiment of the present invention is described in detail.
Consult and Figure 3 shows that in the embodiment of the present invention, the cross-sectional view of colored filter, this colored filter comprises substrate 1, black matrix 2, first color resin layer 3, second color resin layer the 4, three color resin layer 5, PS7, wherein:
Black matrix 2 is positioned on substrate 1;
First color resin layer 3, covers in the first area of substrate 1; Second color resin layer 4, covers in the second area of substrate 1; 3rd color resin layer 5, covers in the 3rd region of substrate 1; Wherein, the thickness of the color resin layer on first area, second area or the 3rd region, is greater than the thickness of the color resin layer in other two regions;
PS7, lays respectively at the assigned address 8 on the first color resin layer 3, second color resin layer 4 and the 3rd color resin layer 5, and the height of these three PS is identical and basal diameter is identical.
Color resin layer thickness on other two regions is identical.
Wherein, the color resin layer thickness in other two regions above-mentioned is 1.5 microns ~ 2.2 microns;
The difference of the color resin layer thickness in the thickness of the color resin layer on above-mentioned first area, second area or the 3rd region and other two regions is 0.2 micron ~ 0.3 micron.
In the embodiment of the present invention, aforesaid substrate 1 can be color membrane substrates, also can be array base palte.
Consult the vertical view that Figure 4 shows that colored filter in the embodiment of the present invention.Wherein, the first color resin layer 3, second color resin layer 4,3rd color resin layer 5 is on substrate 1 for being arranged parallel to each other, further, the order of above-mentioned three color resin layers is random sequence, namely can be followed successively by the first color resin layer 3, second color resin layer 4,3rd color resin layer 5(is as described in Figure 4), also can be followed successively by the first color resin layer the 3, three color resin layer 5, second color resin layer 4, etc.Only provide the situation only comprising three kinds of color resin layers in colored filter in the embodiment of the present invention, the situation of four kinds and above multiple color resin layer can also be comprised.Further, above-mentioned color resin layer can be red resin layer, can be green resin layer, can also be blue resins layer.
Based on foregoing description, the thickness of the color resin layer on the first area on black matrix 2, second area or the 3rd region, be greater than the thickness of the color resin layer in other two regions, color resin layer thickness on other two regions is identical, be specially: the thickness of the first color resin layer 3 is greater than the second color resin layer 4, and the 3rd thickness of color resin layer 5, wherein, the thickness of the second color resin layer 4 equals the thickness 5 of the 3rd color resin layer; Or the thickness of the second color resin layer 4 is greater than the first color resin layer 3, and the thickness of the 3rd color resin layer 5, wherein, the thickness of the first color resin layer 3 equals the thickness of the 3rd color resin layer 5; Or the thickness of the 3rd color resin layer 5 is greater than the first color resin layer 3, and the thickness of the second color resin layer 4, wherein, the thickness of the first color resin layer 3 equals the thickness of the second color resin layer 4.Such as, when above-mentioned first color resin layer 3 is red resin layer, second color resin layer 5 is green resin layer, when 3rd color resin layer 6 is blue resins layer, then the thickness of blue resins layer is greater than the thickness of red resin layer, and the thickness of blue resins layer is greater than the thickness of green resin layer, wherein, the thickness of red resin layer equals the thickness of green resin layer.
In the embodiment of the present invention, PS7 lays respectively at the assigned address on the first color resin layer 3, second color resin layer 4 and the 3rd color resin layer 5, and this assigned address is alternatively non-transparent region (consulting the border circular areas 8 in Fig. 4).
Based on technique scheme, shown in composition graphs 5, in the embodiment of the present invention, the detailed process making colored filter is:
Step 500: form black matrix 2 on substrate 1.
In the embodiment of the present invention, adopt patterning processes to form black matrix 2 on substrate 1, detailed process is: form one deck photoresist on substrate 1, after carrying out exposure imaging process, can form black matrix 2 to the appointed area of substrate 1.
Step 510: form the first color resin layer 3 in the first area of above-mentioned black matrix 2, form the second color resin layer 4 at the second area of this black matrix 2, forms the 3rd color resin layer 5 in the 3rd region of this black matrix 2.
In the embodiment of the present invention, patterning processes is adopted to form the first color resin layer 3 in the first area of above-mentioned black matrix 2, the second color resin layer 4 is formed at the second area of this black matrix 2, the 3rd color resin layer 5 is formed in the 3rd region of this black matrix 2, idiographic flow is: first, the substrate 1 forming black matrix 2 forms one deck first photoresist, after exposure imaging is carried out to this first area, the first color resin layer 3 is formed in first area, wherein, first photoresist is corresponding with the first color resin layer 3, such as, when the first color resin layer 3 is red resin layer, then the first photoresist is red photoresist, when the first color resin layer 3 is green resin layer, then the first photoresist is green photoresist, then, the substrate 1 forming black matrix 2 forms one deck second photoresist, and after carrying out exposure imaging to second area, form the second color resin layer 4 at second area, wherein, the second photoresist is corresponding with the second color resin layer, the substrate 1 forming black matrix 2 forms one deck the 3rd photoresist, and after carrying out exposure imaging to the 3rd region, form the 3rd color resin layer 5 in the 3rd region, wherein, the 3rd photoresist is corresponding with the 3rd color resin layer 5.
In above process, make the thickness of the color resin layer on first area, second area or the 3rd region, be greater than the color resin layer thickness in other two regions.Wherein, the color resin layer thickness in other two regions is identical, is 1.5 microns ~ 2.2 microns.Such as, when the thickness of the first color resin layer 3 is greater than the second color resin layer 4 and the 3rd color resin layer 5, second color resin layer 4 thickness is identical with the thickness of the 3rd color resin layer 5, its Thickness scope is 1.5 microns ~ 2.2 microns, namely the thickness of the second color resin layer 4 thickness and the 3rd color resin layer 5 can be 1.5 microns, can be 1.7 microns, can be 2.0 microns, can be 2.2 microns; And the span of the thickness of above-mentioned first color resin layer 3 is 1.7 microns ~ 2.4 microns, namely the thickness of the first color resin layer 3 can be 1.7 microns, can be 1.9 microns, can be 2.2 microns, can be 2.4 microns.
In the embodiment of the present invention, the color resin layer thickness difference in the thickness of the color resin layer on first area, second area or the 3rd region and other two regions should be kept to be 0.2 ~ 0.3 micron.Such as, when the thickness of the first color resin layer 3 is greater than the second color resin layer 4 and the 3rd color resin layer 5, and when the thickness of the first color resin layer 3 is 1.9 microns, then the thickness of the second color resin layer 4 and the 3rd color resin layer 5 can be 1.7 microns.
Step 520: at the assigned address 8 identical and PS7 that basal diameter is identical of height of formation respectively of above-mentioned first color resin layer 3, second color resin layer 4 and the 3rd color resin layer 5.
In the embodiment of the present invention, patterning processes is adopted to form a PS7 respectively at above-mentioned first color resin layer 3, second color resin layer 4 and the 3rd color resin layer 5, idiographic flow is: at formation first color resin layer 3, second color resin layer 4, and the substrate 1 of the 3rd color resin layer 5 forms one deck photoresist; After carrying out exposure imaging to the assigned address 8 in described first area, second area and the 3rd region, the assigned address 8 in above-mentioned first area, second area and the 3rd region forms a PS7 respectively.In the embodiment of the present invention, above-mentioned photoresist can be the photoresist of subsidiary color, also can be transparent photomask glue; Above-mentioned assigned address 8 can be determined by mask plate, and preferably, this assigned address is arranged in the border circular areas 8 of the schematic top plan view of each color resin layer as shown in Figure 4, the side that namely color resin layer minor face is corresponding; In addition, this assigned address 8 can also be positioned at side corresponding to the long limit of color resin layer.
In above process, due in the product adopting senior super dimension field switch technology, when not adopting planarization layer, still can high resolving power and wide angle display, therefore, in colored filter, after removing planarization layer, still can meet the requirement to display resolution and angles of display, and, in colored filter manufacture craft, planarization layer need not be formed on color resin layer, simplify technological process, reduce cost.
In the embodiment of the present invention, the height being positioned at the PS on the PS on the first color resin layer 3, the second color resin layer 4 and PS on the 3rd color resin layer 5 is identical and basal diameter is identical, this PS7 basal diameter scope is 12 microns ~ 13 microns, 12 microns can be thought, 12.3 microns can be, also 12.7 microns can be.The altitude range of PS7 is 2.5 microns ~ 4 microns.In the embodiment of the present invention, PS7 can be standard cylinder, also can be non-standard cylindrical, the right cylinder that namely upper surface diameter is different from lower surface diameter.When PS7 be non-standard cylindrical time, the upper surface diameter range of PS7 is 8 ~ 9 microns, can think 8 microns, can be 8.2 microns, can be 9 microns; Lower surface diameter is 12 microns ~ 13 microns.
In the embodiment of the present invention, using the PS that is arranged on the maximum color resin layer of three color resin layer thickness as MainPS, play main support effect, be positioned at PS on other two color resin layers as SubPS, play supplemental support effect.Such as, the thickness of the first color resin layer 3 and the second color resin layer 4 is 1.7 microns, and the thickness of the 3rd color resin layer 5 is 1.9 microns, then be positioned at PS on the 3rd color resin layer 5 namely as MainPS, be positioned at PS on the first color resin layer 3 and the second color resin layer as SubPS, now because the difference of the 3rd color resin layer 5 thickness and the first color resin layer 3 and the second color resin layer 4 thickness is 0.2 micron, then above-mentioned three PS7 are identical PS, the difference in height of MainPS and SubPS can be ensured, thus ensure its bearing capacity.
In above process, owing to being comparative maturity to the control of above-mentioned different colours color resin layer thickness and the technology easily realized, therefore, in the embodiment of the present invention, the thickness only needing the thickness of the color resin layer at control MainPS place to be greater than other two color resin layers can ensure the difference in height between MainPS and SubPS, and implementation procedure is simple and convenient, be convenient to control, further, low-temperature bubbles can be reduced, and the pressure-bearing recovery capability of effective control TFTLCD.
In sum, in the embodiment of the present invention, substrate forms the black matrix of one deck; The first color resin layer is formed in the first area of above-mentioned black matrix, the second color resin layer is formed at the second area of this black matrix, the 3rd color resin layer is formed in the 3rd region of this black matrix, wherein, the thickness of the color resin layer on first area, second area or the 3rd region, is greater than the color resin layer thickness in other two regions; A highly identical and PS that basal diameter is identical is formed respectively in the specified location of above-mentioned first color resin layer, the second color resin layer and the 3rd color resin layer.Adopt technical solution of the present invention, planarization layer need not be formed on color resin layer, by means of only the thickness controlling different colours color resin layer, the color resin layer thickness at MainPS place and the color resin layer thickness difference at SubPS place is made to be 0.2 micron ~ 0.3 micron, can produce the colored filter meeting technological requirement, MainPS and SubPS adopts measure-alike PS, need not the difference in height of control MainPS and SubPS, simplify Making programme, effectively save cost of manufacture.
Present invention also offers a kind of display device, comprise above-mentioned colored filter.Concrete, this display device can be liquid crystal indicator, OLED display etc.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the embodiment of the present invention and not depart from the spirit and scope of the embodiment of the present invention.Like this, if these amendments of the embodiment of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (12)
1. a colored filter, is characterized in that, comprising:
Substrate;
Black matrix, covers on the substrate;
First color resin layer, covers in the first area of described black matrix; Second color resin layer, covers in the second area of described black matrix; 3rd color resin layer, covers in the 3rd region of described black matrix; Wherein, the thickness of the color resin layer on described first area, second area or the 3rd region, is greater than the thickness of the color resin layer in other two regions;
Cylindrical spacer (PS), be located immediately at the assigned address on described first color resin layer, the second color resin layer and the 3rd color resin layer respectively, and the height being located immediately at the cylindrical spacer of the assigned address on described first color resin layer, the second color resin layer and the 3rd color resin layer is respectively identical and basal diameter is identical.
2. colored filter as claimed in claim 1, it is characterized in that, the color resin layer thickness on other two regions described is identical.
3. colored filter as claimed in claim 1, it is characterized in that, the color resin layer thickness in other two regions described is 1.5 microns ~ 2.2 microns.
4. colored filter as claimed in claim 1, is characterized in that, the difference of the color resin layer thickness in the thickness of the color resin layer on described first area, second area or the 3rd region and other two regions is 0.2 micron ~ 0.3 micron.
5. a display device, is characterized in that, comprises the arbitrary described colored filter of Claims 1 to 4.
6. a method for making for colored filter, is characterized in that, comprising:
Substrate is formed black matrix;
The first color resin layer is formed in the first area of described black matrix, the second color resin layer is formed at the second area of described black matrix, the 3rd color resin layer is formed in the 3rd region of described black matrix, wherein, the thickness of the color resin layer on described first area, second area or the 3rd region is made to be greater than the thickness of the color resin layer in other two regions;
Assigned address on described first color resin layer, the second color resin layer and the 3rd color resin layer is the identical and cylindrical spacer (PS) that basal diameter is identical of height of formation respectively.
7. method as claimed in claim 6, is characterized in that, also comprise:
Patterning processes is adopted to form black matrix on the substrate.
8. method as claimed in claim 6, it is characterized in that, the color resin layer thickness on other two regions described is identical.
9. method as claimed in claim 8, it is characterized in that, the color resin layer thickness in other two regions described is 1.5 microns ~ 2.2 microns.
10. method as claimed in claim 8, is characterized in that, the difference of the color resin layer thickness in the thickness of the color resin layer on described first area, second area or the 3rd region and other two regions is 0.2 micron ~ 0.3 micron.
11. methods as claimed in claim 6, it is characterized in that, form the first color resin layer in the first area of described black matrix, form the second color resin layer at the second area of described black matrix, form the 3rd color resin layer in the 3rd region of described black matrix, specifically comprise:
The substrate forming described black matrix forms one deck first photoresist, after exposure imaging is carried out to described first area, forms the first color resin layer in described first area;
The substrate forming described black matrix forms one deck second photoresist, after exposure imaging is carried out to described second area, forms the second color resin layer at described second area;
The substrate forming described black matrix forms one deck the 3rd photoresist, after exposure imaging is carried out to described 3rd region, forms the 3rd color resin layer in described 3rd region.
12. methods as described in any one of claim 6 ~ 11, it is characterized in that, assigned address on described first color resin layer, the second color resin layer and the 3rd color resin layer is the identical and cylindrical spacer that basal diameter is identical of height of formation respectively, comprising:
At formation described first color resin layer, the second color resin layer, and the substrate of the 3rd color resin layer forms one deck photoresist;
After carrying out exposure imaging to the assigned address in described first area, second area and the 3rd region, the assigned address in described first area, second area and the 3rd region forms cylindrical spacer respectively.
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| CN104280929A (en) * | 2014-09-30 | 2015-01-14 | 南京中电熊猫液晶材料科技有限公司 | Method for producing color filter |
| CN105607337A (en) * | 2016-03-15 | 2016-05-25 | 武汉华星光电技术有限公司 | Manufacturing method of color film substrate, color film substrate and liquid crystal display panel |
| CN105785636B (en) * | 2016-05-04 | 2019-11-26 | 武汉华星光电技术有限公司 | A kind of liquid crystal display panel and preparation method thereof |
| CN105700215A (en) * | 2016-05-07 | 2016-06-22 | 深圳爱易瑞科技有限公司 | Display panel manufacturing method |
| CN105700216A (en) * | 2016-05-07 | 2016-06-22 | 深圳爱易瑞科技有限公司 | Method for manufacturing liquid crystal display panel |
| US9846340B1 (en) * | 2016-06-15 | 2017-12-19 | A.U. Vista, Inc. | Pixel structure utilizing photo spacer stage design and display device having the same |
| CN109061969B (en) * | 2018-08-31 | 2021-09-28 | Tcl华星光电技术有限公司 | Array substrate and display panel thereof |
| CN109283753A (en) * | 2018-10-30 | 2019-01-29 | 武汉华星光电技术有限公司 | Display panel and display device |
| CN109407413A (en) * | 2018-11-12 | 2019-03-01 | 惠科股份有限公司 | Display panel, display device and manufacturing photomask thereof |
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