CN105206643A - Pixel defining layer structure and manufacturing method thereof, display panel, and display apparatus - Google Patents
Pixel defining layer structure and manufacturing method thereof, display panel, and display apparatus Download PDFInfo
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- CN105206643A CN105206643A CN201510517319.6A CN201510517319A CN105206643A CN 105206643 A CN105206643 A CN 105206643A CN 201510517319 A CN201510517319 A CN 201510517319A CN 105206643 A CN105206643 A CN 105206643A
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Abstract
The invention discloses a pixel defining layer structure and a manufacturing method thereof, a display panel, and a display apparatus. The pixel defining layer structure comprises a first pixel defining layer and a second pixel defining layer disposed on the first pixel defining layer, wherein the first pixel defining layer is provided with multiple first openings in one-to-one corresponding to the luminescence area of each sub pixel, and the second pixel defining layer is provided with multiple second openings shared by an area formed by connecting sub pixels having the same color. Through the pixel defining layer structure provided by the invention, the multiple sub pixels having the same color are combined together for simultaneous printing so that the deposition area of ink is increased by multiple times. Therefore, the dimension of each sub pixel can be effectively reduced, at the same time, it is ensured that the ink does not overflow due to too small area of the sub pixels, and finally, a printing type high-resolution display device is prepared.
Description
Technical field
The present invention relates to Display Technique field, particularly relate to a kind of pixel and define Rotating fields and preparation method thereof, display floater and display unit.
Background technology
Adopting solution processing and fabricating OLED and QLED display, due to its low cost, high production capacity, be easy to realize the advantages such as large scale, is the important directions of following Display Technique development.Wherein, printing technology is considered to the most effective way realizing OLED and QLED low cost and the full-color display of large area.
In typography, due to the impact by equipment precision and drop size, the RGBStripe(RGB strip for traditional) dot structure that arranges, be difficult to the preparation realizing high resolution display part.When the resolution of display device reaches 200ppi, the width of each sub-pixel can be reduced to 42 μm, and simultaneously because pixel defines the existence of layer, the actual width of sub-pixel can be further reduced to about 35 μm, and for the ink of 10pL volume, its diameter just reaches 27 μm.If improve resolution further again, sub-pixel size can reduce further, so it is separate and do not overflow pixel to be just difficult to control ink in each sub-pixel.
Disclose a kind of pixel arrangement structure in Chinese patent (CN104009066A), by the sub-pixel of unconnected pixels is shared Mask(mask) on opening, thus effectively improve the resolution of display device.But, in typography, this pixel arrangement structure of simple introducing, along with the increase of resolution, ink in each sub-pixel still can overflow pixel hole because Pixel Dimensions diminishes, with the sub-pixel generation color cross-talk of adjacent different colours, display device display effect is caused to decline, therefore in typography, directly this structure is applied, or the size that cannot reduce sub-pixel keeps the separate of deposited ink between different colours sub-pixel, and therefore this dot structure cannot realize the making of the typography of high resolution display simultaneously.
Prepare in the technique of the display screen of OLED in typography, Chinese patent (CN104393192A, CN104409653A) design of a kind of dot structure is disclosed, namely each sub-pixel adopts two-layer pixel to define layer, ground floor is hydrophilic film, the second layer is hydrophobic film, thus realize ink well sprawling and film forming near pixel electrode, simultaneously because second of pixel defines the hydrophobicity of layer, ink forms larger contact angle in pixel, thus prevent ink from overflowing, effectively realize the typography preparation of OLED display screen.But this dot structure cannot be avoided causing elemental area to reduce because display device resolution increases equally, and then cause ink because of the excessive spilling pixel hole of volume, finally cause the problem of display device pixel color crosstalk.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of pixel to define Rotating fields and preparation method thereof, display floater and display unit, be intended to solve in prior art cause because display device resolution increases elemental area to reduce and then cause ink to overflow pixel and cheat the problem causing color cross-talk.
Technical scheme of the present invention is as follows:
A kind of pixel defines Rotating fields, wherein, comprise the first pixel to define layer and be positioned at the second pixel that the first pixel defines on layer and define layer, described first pixel defines layer to be had and the light-emitting zone of each sub-pixel multiple first opening one to one, and described second pixel defines layer and has multiple second openings that the region of joining together for same color sub-pixel shares.
Described pixel defines Rotating fields, and wherein, the thickness that described first pixel defines layer is 50 ~ 500nm.
Described pixel defines Rotating fields, and wherein, the thickness that described second pixel defines layer is 1000 ~ 5000nm.
Described pixel defines Rotating fields, and wherein, it is hydrophilic film layer that described first pixel defines layer, and it is hydrophobic film layer that described second pixel defines layer.
Described pixel defines Rotating fields, and wherein, described hydrophilic film layer is negativity photoresistance film, and described hydrophobic film layer is positivity photoresistance film.
A kind of display floater, wherein, it comprises the pixel as above be formed on array base palte and defines Rotating fields.
Described display floater, wherein, multiple pixel cells that the sub-pixel that the dot structure on described array base palte comprises three kinds of colors is formed; Each pixel cell becomes Chinese character pin-shaped arrangement to form square structure by three sub pixels.
Described display floater, wherein, described sub-pixel comprises red sub-pixel, green sub-pixels and blue subpixels.
A kind of display unit, wherein, comprises display floater as above.
Pixel defines a preparation method for Rotating fields, wherein, comprises step:
Array base palte is formed one deck hydrophilic film layer, and exposure imaging is carried out to it forms the first pixel had with the light-emitting zone of each sub-pixel multiple first opening one to one and define layer;
The array base palte being formed with the first pixel and defining layer forms one deck hydrophobic film layer, and exposure imaging is carried out to it forms second pixel with multiple second openings that the region of joining together for same color sub-pixel shares and define layer.
Multiple sub-pixels of same color are combined and print simultaneously by beneficial effect: define Rotating fields by the pixel in the present invention, thus the deposition region increasing ink at double.Therefore the size that the present invention can effectively reduce each sub-pixel ensures that ink can not overflow because sub-pixel area is too small simultaneously, finally realizes the preparation of printed form high resolution display part.
Accompanying drawing explanation
Fig. 1 is the structural representation that pixel of the present invention defines the preferred embodiment of structure.
Fig. 2 is the flow chart that pixel of the present invention defines the manufacture method preferred embodiment of Rotating fields.
Fig. 3 to Fig. 7 is the different conditions side sectional view that pixel of the present invention defines Rotating fields manufacture method.
Embodiment
The invention provides a kind of pixel and define Rotating fields and preparation method thereof, display floater and display unit, for making object of the present invention, technical scheme and effect clearly, clearly, the present invention is described in more detail below.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
A kind of pixel provided by the present invention defines Rotating fields, as shown in Figure 1, comprise the first pixel to define layer and be positioned at the second pixel that the first pixel defines on layer 120 and define layer 130, described first pixel defines layer 120 and has light-emitting zone multiple first opening one to one with each sub-pixel (as the blue subpixels 111 in Fig. 1, green sub-pixels 112, red sub-pixel 113), and described second pixel defines layer 130 and has multiple second openings that the region of joining together for same color sub-pixel shares.
By structural design of the present invention, multiple sub-pixels of same color can be combined and print simultaneously, thus the deposition region increasing ink at double.Therefore, the size that can be effectively reduced single sub-pixel by this structure ensures that ink can not overflow because sub-pixel area is too small simultaneously, finally realizes the preparation of printed form high resolution display part.
The first pixel wherein defines layer 120 for water wetted material preparation (hydrophilic film layer), the light-emitting zone one_to_one corresponding of opening and each sub-pixel, and the first pixel defines the light-emitting zone that layer 120 defines each sub-pixel; Second pixel defines layer 130 for hydrophobic material preparation (hydrophobic film layer), the sub-pixel with same color wherein flocked together shares the opening that second pixel defines layer 130, second pixel defines the deposition region that layer 130 defines typography ink inside, namely the second pixel defines the open area of layer 130 is that multiple sub-pixel shares, thus significantly improve the depositional area of ink, prevent ink from overflowing.
The thickness that first pixel defines layer 120 is 50nm ~ 500nm, and the thickness that the second pixel defines layer 130 is 1000nm ~ 5000nm.In printing preparation process, simultaneously the sub-pixel shared in open area carries out printing preparation, because the first pixel defines layer 120 for water wetted material preparation, therefore good sprawling can be formed in whole region after deposit of ink to these regions, because the open areas shared increases exponentially relative to the area of single sub-pixel, define the hydrophobicity of layer 130 in conjunction with the second pixel, therefore can deposit more ink and not overflow.So adopt structure of the present invention, the size that can reduce sub-pixel keeps ink not overflow in deposition region simultaneously, thus improve the resolution of display device.
Described hydrophilic film layer is negativity photoresistance film, and described hydrophobic film layer is positivity photoresistance film.Be independent of each other when exposure imaging like this.
The present invention also provides above-mentioned pixel to define the preparation method of Rotating fields, and as shown in Figure 2, it comprises:
S101, on array base palte, form one deck hydrophilic film layer, and exposure imaging is carried out to it form the first pixel had with the light-emitting zone of each sub-pixel multiple first opening one to one and define layer;
S102, on the array base palte being formed with the first pixel and defining layer, form one deck hydrophobic film layer, and exposure imaging is carried out to it form second pixel with multiple second openings that the region of joining together for same color sub-pixel shares and define layer.
Specifically, as shown in Figure 3, first making tft array 210 and the patterned transparent anode 220(sub-pixel for the formation of shades of colour) array base palte 200 on deposit one deck hydrophilic film layer, wherein, described hydrophilic film layer is negativity photoresistance film, subsequently exposure imaging is carried out to this layer of hydrophilic film layer, formed and transparent anode 220 opening one to one, as shown in Figure 4, forming the first pixel, to define layer 120, Fig. 5 be made the side sectional view that the first pixel defines the array base palte 200 of layer 120.By this step, array base palte 200 defines light-emitting area and the region of each sub-pixel.
Then on array base palte 200, one deck hydrophobic film layer is deposited further, as shown in Figure 6, wherein, described hydrophobic film layer is positivity photoresistance film, carry out exposure imaging to this layer of hydrophobic film layer subsequently to form the second pixel and define layer 130, as shown in Figure 7, because the first pixel defines layer 120 for negativity photoresistance, therefore define layer 130 in the second pixel to carry out can not defining layer 120 to the first pixel in the process of exposure imaging and destroy, maintain the integrality that the first pixel defines layer 120.After second pixel defines layer 130 exposure imaging, the region that same color sub-pixel joins together shares an opening, thus significantly increase the later stage printing time ink deposition region.Fig. 7 be complete the second pixel define layer make after the side sectional view of array base palte.By this step, the region that same color sub-pixel on array base palte 200 joins together is formed a large-area deposit of ink region, namely the second pixel defines the deposition region that layer 130 defines printing process ink inside.Hydrophilic surface is with transparent anode 220 because the first pixel defines layer 120, therefore ink can form good sprawling in this region, define layer 130 in conjunction with hydrophobic second pixel, thus effectively solve the less problem causing ink to overflow of factor Pixel Dimensions.
Further, on the array base palte 200 completing above-mentioned steps, typography is adopted to make red, green, blue three-colour light-emitting element.Wherein, define layer 130 open area in the second pixel print light emitting material solution respectively thus form each functional layer of light-emitting component, because the first pixel defines the hydrophily of layer 120 and transparent anode 220, good sprawling can be formed after liquid deposition, therefore the open area that full second pixel defines layer 130 can be filled, due to increasing exponentially of area, can effectively avoid solution to overflow because sub-pixel area is less, cause color cross-talk.Define the open area of layer 130 in the second pixel, each functional layer of light-emitting component joins together, but the open area that light-emitting zone still defines layer 120 by the first pixel determines.Therefore, adopt manufacture method of the present invention, significantly expand the deposition region of ink, thus can reduce the size of sub-pixel, realize the typography preparation of high resolution display part.
The present invention also provides a kind of display floater, and it comprises the pixel as above be formed on array base palte and defines Rotating fields.This display floater can be OLED or QLED, and the preparation technology adopted is typography.This display floater is that driven with active matrix mode drives, and what wherein drive light-emitting component is tft array;
Multiple pixel cells that the sub-pixel that dot structure on described array base palte comprises three kinds of colors is formed; Each pixel cell becomes Chinese character pin-shaped arrangement to form square structure by three sub pixels.
Described sub-pixel comprises red sub-pixel, green sub-pixels and blue subpixels.
As shown in Figure 1, a pixel cell 110 is the square structures be made up of a red sub-pixel 113, green sub-pixels 112 and a blue subpixels 111, described blue subpixels 111 occupies 4/9ths of pixel cell 110 area, i.e. 2/3d*2/3d, wherein d is the length of side of pixel cell; Described red sub-pixel 113 occupies 1/3rd of pixel cell 110 area, i.e. 1/3d*1d; Described green sub-pixels 112 occupies 2/9ths of pixel cell 110 area, i.e. 1/3d*2/3d.
The size of each sub-pixel area is corresponding with the light-emitting component performance of shades of colour.The area that performance is the highest is minimum, and the area that performance is minimum is maximum, thus the color stability of effectively adjusting device long-term work.
In above-mentioned dot structure, the same color sub-pixel of unconnected pixels gets close to mutually, and final formation four blue subpixels join together, and four green sub-pixels join together, the structure that two row red sub-pixel join together.
For the resolution of 300ppi, corresponding square pixel unit, the size of each pixel cell 84 μm × 84 μm, if now adopt traditional strip arrangement of subpixels, then each sub-pixel is of a size of 28 μm × 84 μm, removing pixel defines the area that layer occupies, the width of actual sub-pixel about about 20 μm, its liquid-drop diameter of ink of conventional 10pL volume is 27 μm, ink obviously can overflow sub-pixel, adopts the dot structure of isosceles triangle arrangement equally also can ink be caused to overflow because sub-pixel size is little.And when adopting pixel of the present invention to define Rotating fields, the green sub-pixels of minimum area its be of a size of 28 μm × 56 μm, but define layer opening because four sub-pixels share the second pixel, therefore the area of actual deposit of ink is 56 μm × 112 μm, the ink of 10pL is now adopted to print, area meets the demands completely, and ink spilling can not occur.Therefore adopt this dot structure, the resolution of printed form display device can also be improved further.
The present invention also provides a kind of display unit, and it comprises display floater as above.
In sum, the present invention defines the optimization of Rotating fields by pixel, adjacent same color sub-pixel being joined together, meanwhile, defining layer by adopting two-layer pixel, ground floor is water wetted material preparation, the light-emitting zone one_to_one corresponding of opening and each sub-pixel, defines light-emitting area and the region of each sub-pixel, and the second layer is hydrophobic material preparation, the sub-pixel that wherein same color joins together shares an opening, the depositional area of its definition printing process ink inside and region.Like this in typography, layer is defined and transparent anode is hydrophily due to the first pixel, second pixel that is deposited on hydrophilic inks defines any position in the open area of layer, due to the spreadability that it is good, the ink meeting whole region of uniform filling, the relatively single sub-pixel area of aperture area defining layer due to the second pixel increases exponentially, and defines the hydrophobicity of layer, effectively can suppress the spillover that ink causes because single sub-pixel area is too small in conjunction with the second pixel.In addition, corresponding with luminescent material performance by red, green, blue each sub-pixel for emitting light size, the long-time stability of enhance device display color.Therefore, layer is defined by two-layer pixel of the present invention, significantly can reduce the size of each sub-pixel, ensure the validity of typography simultaneously, namely will ink be caused to overflow because sub-pixel size is too small in printing process, and then solution typography is difficult to the limitation of the preparation realizing high resolution display part, realizes the making of printed form high resolution display part.
Should be understood that, application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection range that all should belong to claims of the present invention.
Claims (10)
1. a pixel defines Rotating fields, it is characterized in that, comprise the first pixel to define layer and be positioned at the second pixel that the first pixel defines on layer and define layer, described first pixel defines layer to be had and the light-emitting zone of each sub-pixel multiple first opening one to one, and described second pixel defines layer and has multiple second openings that the region of joining together for same color sub-pixel shares.
2. pixel according to claim 1 defines Rotating fields, it is characterized in that, the thickness that described first pixel defines layer is 50 ~ 500nm.
3. pixel according to claim 1 defines Rotating fields, it is characterized in that, the thickness that described second pixel defines layer is 1000 ~ 5000nm.
4. pixel according to claim 1 defines Rotating fields, it is characterized in that, it is hydrophilic film layer that described first pixel defines layer, and it is hydrophobic film layer that described second pixel defines layer.
5. pixel according to claim 4 defines Rotating fields, it is characterized in that, described hydrophilic film layer is negativity photoresistance film, and described hydrophobic film layer is positivity photoresistance film.
6. a display floater, is characterized in that, it comprises the pixel as described in any one of claim 1 ~ 5 be formed on array base palte and defines Rotating fields.
7. display floater according to claim 6, is characterized in that, multiple pixel cells that the sub-pixel that the dot structure on described array base palte comprises three kinds of colors is formed; Each pixel cell becomes Chinese character pin-shaped arrangement to form square structure by three sub pixels.
8. display floater according to claim 7, is characterized in that, described sub-pixel comprises red sub-pixel, green sub-pixels and blue subpixels.
9. a display unit, is characterized in that, comprises the display floater as described in any one of claim 6 ~ 8.
10. pixel defines a preparation method for Rotating fields, it is characterized in that, comprises step:
Array base palte is formed one deck hydrophilic film layer, and exposure imaging is carried out to it forms the first pixel had with the light-emitting zone of each sub-pixel multiple first opening one to one and define layer;
The array base palte being formed with the first pixel and defining layer forms one deck hydrophobic film layer, and exposure imaging is carried out to it forms second pixel with multiple second openings that the region of joining together for same color sub-pixel shares and define layer.
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